merge sebres-8-6-clock-speedup (clock speed-up / flightaware Tcl-bounties#4, see RFE [ddc948cff9781daac7ad95a3077b3c1b4f07cf93])

28 files changed, 10436 insertions, 4838 deletions

diff --git a/doc/clock.n b/doc/clock.n
index 889a5da..38b408d 100644
--- a/doc/clock.n
+++ b/doc/clock.n
@@ -87,6 +87,15 @@ slowing its clock by a tiny fraction for some minutes until it is
 back in sync with UTC; its data model does not represent minutes that
 have 59 or 61 seconds.
 .TP
+\fI\-now\fR
+Instead of \fItimeVal\fR a non-integer option \fI\-now\fR can be used as
+replacement for today, which is simply interpolated to the runt-time as value
+of \fBclock seconds\fR. For example:
+.sp
+\fBclock format -now -f %a; # current day of the week\fR
+.sp
+\fBclock add -now 1 month; # next month\fR
+.TP
 \fIunit\fR
 One of the words, \fBseconds\fR, \fBminutes\fR, \fBhours\fR,
 \fBdays\fR, \fBweeks\fR, \fBmonths\fR, or \fByears\fR, or
@@ -528,6 +537,12 @@ abbreviation appropriate to the current locale, and uses it to fix
 whether \fB%Y\fR refers to years before or after Year 1 of the
 Common Era.
 .TP
+\fB%Es\fR
+This affects similar to \fB%s\fR, but in opposition to \fB%s\fR it parses
+or formats local seconds (not the posix seconds).
+Because \fB%s\fR has the same precedence as \fB%s\fR (uniquely determines 
+a point in time), it overrides all other input formats.
+.TP
 \fB%Ex\fR
 On output, produces a locale-dependent representation of the date
 in the locale's alternative calendar.  On input, matches
@@ -722,13 +737,15 @@ week number \fB%V\fR; programs should use \fB%G\fR for that purpose.
 On output, produces the current time zone, expressed in hours and
 minutes east (+hhmm) or west (\-hhmm) of Greenwich. On input, accepts a
 time zone specifier (see \fBTIME ZONES\fR below) that will be used to
-determine the time zone.
+determine the time zone (this token is optionally applicable on input, 
+so the value is not mandatory and can be missing in input).
 .TP
 \fB%Z\fR
 On output, produces the current time zone's name, possibly
 translated to the given locale. On input, accepts a time zone
 specifier (see \fBTIME ZONES\fR below) that will be used to determine the
-time zone. This option should, in general, be used on input only when
+time zone (token is also like \fB%z\fR optionally applicable on input).
+This option should, in general, be used on input only when
 parsing RFC822 dates. Other uses are fraught with ambiguity; for
 instance, the string \fBBST\fR may represent British Summer Time or
 Brazilian Standard Time. It is recommended that date/time strings for
@@ -927,6 +944,24 @@ used.  Finally, a correction is applied so that the correct hour of
 the day is produced after allowing for daylight savings time
 differences and the correct date is given when going from the end
 of a long month to a short month.
+.PP
+The precedence of the applying of single tokens resp. which sequence will be
+used by calculating of the time is complex, e. g. heavily dependent on the
+precision of type of the token.
+.sp
+In example below the second date-string contains "next January", therefore
+it results in next year but in January. And third date-string besides "January"
+contains also additionally "Fri", so it results in the nearest Friday.
+Thus both win before "385 days" resp. make it more precise, because of higher 
+precision of this token types.
+.CS
+% clock format [clock scan "5 years 18 months 385 days" -base 0 -gmt 1] -gmt 1
+Thu Jul 21 00:00:00 GMT 1977
+% clock format [clock scan "5 years 18 months 385 days next January" -base 0 -gmt 1] -gmt 1
+Sat Jan 21 00:00:00 GMT 1978
+% clock format [clock scan "5 years 18 months 385 days next January Fri" -base 0 -gmt 1] -gmt 1
+Fri Jan 27 00:00:00 GMT 1978
+.CE
 .SH "SEE ALSO"
 msgcat(n)
 .SH KEYWORDS
diff --git a/doc/timerate.n b/doc/timerate.n
new file mode 100644
index 0000000..df9a8f7
--- /dev/null
+++ b/doc/timerate.n
@@ -0,0 +1,114 @@
+'\"
+'\" Copyright (c) 2005 Sergey Brester aka sebres.
+'\"
+'\" See the file "license.terms" for information on usage and redistribution
+'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+'\"
+.TH timerate n "" Tcl "Tcl Built-In Commands"
+.so man.macros
+.BS
+'\" Note:  do not modify the .SH NAME line immediately below!
+.SH NAME
+timerate \- Time-related execution resp. performance measurement of a script
+.SH SYNOPSIS
+\fBtimerate \fIscript\fR \fI?time?\fR
+.sp
+\fBtimerate \fI?-direct?\fR \fI?-overhead double?\fR \fIscript\fR \fI?time?\fR
+.sp
+\fBtimerate \fI?-calibrate?\fR \fI?-direct?\fR \fIscript\fR \fI?time?\fR
+.BE
+.SH DESCRIPTION
+.PP
+The first and second form will evaluate \fIscript\fR until the interval
+\fItime\fR given in milliseconds elapses, or for 1000 milliseconds (1 second)
+if \fItime\fR is not specified. 
+.sp
+It will then return a canonical tcl-list of the form
+.PP
+.CS
+\f0.095977 µs/# 52095836 # 10419167 #/sec 5000.000 nett-ms\fR
+.CE
+.PP
+which indicates:
+.IP \(bu
+the average amount of time required per iteration, in microseconds (lindex $result 0)
+.IP \(bu
+the count how many times it was executed (lindex $result 2)
+.IP \(bu
+the estimated rate per second (lindex $result 4)
+.IP \(bu
+the estimated real execution time without measurement overhead (lindex $result 6)
+.PP
+Time is measured in elapsed time using heighest timer resolution as possible, not CPU time.
+This command may be used to provide information as to how well the script or a tcl-command 
+is performing and can help determine bottlenecks and fine-tune application performance.
+.PP
+\fI-calibrate\fR
+.
+To measure very fast scripts as exact as posible the calibration process
+may be required.
+
+This parameter used to calibrate \fBtimerate\fR calculating the estimated overhead 
+of given \fIscript\fR as default overhead for further execution of \fBtimerate\fR.
+It can take up to 10 seconds if parameter \fItime\fR is not specified.
+.PP
+\fI-overhead double\fR
+.
+This parameter used to supply the measurement overhead of single iteration 
+(in microseconds) that should be ignored during whole evaluation process.
+.PP
+\fI-direct\fR
+.
+Causes direct execution per iteration (not compiled variant of evaluation used).
+.PP
+In opposition to \fBtime\fR the execution limited here by fixed time instead of 
+repetition count.
+Additionally the compiled variant of the script will be used during whole evaluation 
+(as if it were part of a compiled \fBproc\fR), if parameter \fI-direct\fR is not specified.
+Therefore it provides more precise results and prevents very long execution time 
+by slow scripts resp. scripts with unknown speed.
+
+.SH EXAMPLE
+Estimate how fast it takes for a simple Tcl \fBfor\fR loop (including
+operations on variable \fIi\fR) to count to a ten:
+.PP
+.CS
+# calibrate:
+timerate -calibrate {}
+# measure:
+timerate { for {set i 0} {$i<10} {incr i} {} } 5000
+.CE
+.PP
+Estimate how fast it takes for a simple Tcl \fBfor\fR loop only (ignoring the 
+overhead for operations on variable \fIi\fR) to count to a ten:
+.PP
+.CS
+# calibrate for overhead of variable operations:
+set i 0; timerate -calibrate {expr {$i<10}; incr i} 1000
+# measure:
+timerate { for {set i 0} {$i<10} {incr i} {} } 5000
+.CE
+.PP
+Estimate the rate of calculating the hour using \fBclock format\fR only, ignoring 
+overhead of the rest, without measurement how fast it takes for a whole script:
+.PP
+.CS
+# calibrate:
+timerate -calibrate {}
+# estimate overhead:
+set tm 0
+set ovh [lindex [timerate { incr tm [expr {24*60*60}] }] 0]
+# measure using esimated overhead:
+set tm 0
+timerate -overhead $ovh {
+    clock format $tm -format %H
+    incr tm [expr {24*60*60}]; # overhead for this is ignored
+} 5000
+.CE
+.SH "SEE ALSO"
+time(n)
+.SH KEYWORDS
+script, timerate, time
+.\" Local Variables:
+.\" mode: nroff
+.\" End:
diff --git a/generic/tclBasic.c b/generic/tclBasic.c
index 0486383..4d392d0 100644
--- a/generic/tclBasic.c
+++ b/generic/tclBasic.c
@@ -285,6 +285,7 @@ static const CmdInfo builtInCmds[] = {
     {"source",		Tcl_SourceObjCmd,	NULL,			TclNRSourceObjCmd,	0},
     {"tell",		Tcl_TellObjCmd,		NULL,			NULL,	CMD_IS_SAFE},
     {"time",		Tcl_TimeObjCmd,		NULL,			NULL,	CMD_IS_SAFE},
+    {"timerate",	Tcl_TimeRateObjCmd,	NULL,			NULL,	CMD_IS_SAFE},
     {"unload",		Tcl_UnloadObjCmd,	NULL,			NULL,	0},
     {"update",		Tcl_UpdateObjCmd,	NULL,			NULL,	CMD_IS_SAFE},
     {"vwait",		Tcl_VwaitObjCmd,	NULL,			NULL,	CMD_IS_SAFE},
diff --git a/generic/tclClock.c b/generic/tclClock.c
index 02b2845..c980a27 100644
--- a/generic/tclClock.c
+++ b/generic/tclClock.c
@@ -8,12 +8,16 @@
  * Copyright 1991-1995 Karl Lehenbauer and Mark Diekhans.
  * Copyright (c) 1995 Sun Microsystems, Inc.
  * Copyright (c) 2004 by Kevin B. Kenny. All rights reserved.
+ * Copyright (c) 2015 by Sergey G. Brester aka sebres. All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  */
 
 #include "tclInt.h"
+#include "tclStrIdxTree.h"
+#include "tclDate.h"
+#include "tclCompile.h"
 
 /*
  * Windows has mktime. The configurators do not check.
@@ -24,21 +28,6 @@
 #endif
 
 /*
- * Constants
- */
-
-#define JULIAN_DAY_POSIX_EPOCH		2440588
-#define SECONDS_PER_DAY			86400
-#define JULIAN_SEC_POSIX_EPOCH	      (((Tcl_WideInt) JULIAN_DAY_POSIX_EPOCH) \
-					* SECONDS_PER_DAY)
-#define FOUR_CENTURIES			146097	/* days */
-#define JDAY_1_JAN_1_CE_JULIAN		1721424
-#define JDAY_1_JAN_1_CE_GREGORIAN	1721426
-#define ONE_CENTURY_GREGORIAN		36524	/* days */
-#define FOUR_YEARS			1461	/* days */
-#define ONE_YEAR			365	/* days */
-
-/*
  * Table of the days in each month, leap and common years
  */
 
@@ -55,70 +44,13 @@ static const int daysInPriorMonths[2][13] = {
  * Enumeration of the string literals used in [clock]
  */
 
-typedef enum ClockLiteral {
-    LIT__NIL,
-    LIT__DEFAULT_FORMAT,
-    LIT_BCE,		LIT_C,
-    LIT_CANNOT_USE_GMT_AND_TIMEZONE,
-    LIT_CE,
-    LIT_DAYOFMONTH,	LIT_DAYOFWEEK,		LIT_DAYOFYEAR,
-    LIT_ERA,		LIT_GMT,		LIT_GREGORIAN,
-    LIT_INTEGER_VALUE_TOO_LARGE,
-    LIT_ISO8601WEEK,	LIT_ISO8601YEAR,
-    LIT_JULIANDAY,	LIT_LOCALSECONDS,
-    LIT_MONTH,
-    LIT_SECONDS,	LIT_TZNAME,		LIT_TZOFFSET,
-    LIT_YEAR,
-    LIT__END
-} ClockLiteral;
-static const char *const literals[] = {
-    "",
-    "%a %b %d %H:%M:%S %Z %Y",
-    "BCE",		"C",
-    "cannot use -gmt and -timezone in same call",
-    "CE",
-    "dayOfMonth",	"dayOfWeek",		"dayOfYear",
-    "era",		":GMT",			"gregorian",
-    "integer value too large to represent",
-    "iso8601Week",	"iso8601Year",
-    "julianDay",	"localSeconds",
-    "month",
-    "seconds",		"tzName",		"tzOffset",
-    "year"
-};
-
-/*
- * Structure containing the client data for [clock]
- */
-
-typedef struct ClockClientData {
-    int refCount;		/* Number of live references. */
-    Tcl_Obj **literals;		/* Pool of object literals. */
-} ClockClientData;
+CLOCK_LITERAL_ARRAY(Literals);
 
-/*
- * Structure containing the fields used in [clock format] and [clock scan]
- */
+/* Msgcat literals for exact match (mcKey) */
+CLOCK_LOCALE_LITERAL_ARRAY(MsgCtLiterals, "");
+/* Msgcat index literals prefixed with _IDX_, used for quick dictionary search */
+CLOCK_LOCALE_LITERAL_ARRAY(MsgCtLitIdxs, "_IDX_");
 
-typedef struct TclDateFields {
-    Tcl_WideInt seconds;	/* Time expressed in seconds from the Posix
-				 * epoch */
-    Tcl_WideInt localSeconds;	/* Local time expressed in nominal seconds
-				 * from the Posix epoch */
-    int tzOffset;		/* Time zone offset in seconds east of
-				 * Greenwich */
-    Tcl_Obj *tzName;		/* Time zone name */
-    int julianDay;		/* Julian Day Number in local time zone */
-    enum {BCE=1, CE=0} era;	/* Era */
-    int gregorian;		/* Flag == 1 if the date is Gregorian */
-    int year;			/* Year of the era */
-    int dayOfYear;		/* Day of the year (1 January == 1) */
-    int month;			/* Month number */
-    int dayOfMonth;		/* Day of the month */
-    int iso8601Year;		/* ISO8601 week-based year */
-    int iso8601Week;		/* ISO8601 week number */
-    int dayOfWeek;		/* Day of the week */
-} TclDateFields;
 static const char *const eras[] = { "CE", "BCE", NULL };
 
 /*
@@ -139,26 +71,23 @@ TCL_DECLARE_MUTEX(clockMutex)
  * Function prototypes for local procedures in this file:
  */
 
-static int		ConvertUTCToLocal(Tcl_Interp *,
-			    TclDateFields *, Tcl_Obj *, int);
 static int		ConvertUTCToLocalUsingTable(Tcl_Interp *,
-			    TclDateFields *, int, Tcl_Obj *const[]);
+			    TclDateFields *, int, Tcl_Obj *const[],
+			    Tcl_WideInt rangesVal[2]);
 static int		ConvertUTCToLocalUsingC(Tcl_Interp *,
 			    TclDateFields *, int);
-static int		ConvertLocalToUTC(Tcl_Interp *,
-			    TclDateFields *, Tcl_Obj *, int);
+static int		ConvertLocalToUTC(ClientData clientData, Tcl_Interp *,
+			    TclDateFields *, Tcl_Obj *timezoneObj, int);
 static int		ConvertLocalToUTCUsingTable(Tcl_Interp *,
-			    TclDateFields *, int, Tcl_Obj *const[]);
+			    TclDateFields *, int, Tcl_Obj *const[],
+			    Tcl_WideInt rangesVal[2]);
 static int		ConvertLocalToUTCUsingC(Tcl_Interp *,
 			    TclDateFields *, int);
-static Tcl_Obj *	LookupLastTransition(Tcl_Interp *, Tcl_WideInt,
-			    int, Tcl_Obj *const *);
+static int		ClockConfigureObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]);
 static void		GetYearWeekDay(TclDateFields *, int);
 static void		GetGregorianEraYearDay(TclDateFields *, int);
 static void		GetMonthDay(TclDateFields *);
-static void		GetJulianDayFromEraYearWeekDay(TclDateFields *, int);
-static void		GetJulianDayFromEraYearMonthDay(TclDateFields *, int);
-static int		IsGregorianLeapYear(TclDateFields *);
 static int		WeekdayOnOrBefore(int, int);
 static int		ClockClicksObjCmd(
 			    ClientData clientData, Tcl_Interp *interp,
@@ -166,6 +95,10 @@ static int		ClockClicksObjCmd(
 static int		ClockConvertlocaltoutcObjCmd(
 			    ClientData clientData, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
+
+static int		ClockGetDateFields(ClientData clientData, 
+			    Tcl_Interp *interp, TclDateFields *fields, 
+			    Tcl_Obj *timezoneObj, int changeover);
 static int		ClockGetdatefieldsObjCmd(
 			    ClientData clientData, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
@@ -184,13 +117,28 @@ static int		ClockMicrosecondsObjCmd(
 static int		ClockMillisecondsObjCmd(
 			    ClientData clientData, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
-static int		ClockParseformatargsObjCmd(
+static int		ClockSecondsObjCmd(
 			    ClientData clientData, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
-static int		ClockSecondsObjCmd(
+static int		ClockFormatObjCmd(
+			    ClientData clientData, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+static int		ClockScanObjCmd(
+			    ClientData clientData, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const objv[]);
+static int		ClockScanCommit(
+			    ClientData clientData, register DateInfo *info,
+			    register ClockFmtScnCmdArgs *opts);
+static int		ClockFreeScan(
+			    register DateInfo *info, 
+			    Tcl_Obj *strObj, ClockFmtScnCmdArgs *opts);
+static int		ClockCalcRelTime(
+			    register DateInfo *info, ClockFmtScnCmdArgs *opts);
+static int		ClockAddObjCmd(
 			    ClientData clientData, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const objv[]);
 static struct tm *	ThreadSafeLocalTime(const time_t *);
+static unsigned long	TzsetGetEpoch(void);
 static void		TzsetIfNecessary(void);
 static void		ClockDeleteCmdProc(ClientData);
 
@@ -202,22 +150,32 @@ struct ClockCommand {
     const char *name;		/* The tail of the command name. The full name
 				 * is "::tcl::clock::<name>". When NULL marks
 				 * the end of the table. */
-    Tcl_ObjCmdProc *objCmdProc;	/* Function that implements the command. This
+    Tcl_ObjCmdProc *objCmdProc; /* Function that implements the command. This
 				 * will always have the ClockClientData sent
 				 * to it, but may well ignore this data. */
+    CompileProc *compileProc;	/* The compiler for the command. */
+    ClientData clientData;	/* Any clientData to give the command (if NULL
+    				 * a reference to ClockClientData will be sent) */
 };
 
 static const struct ClockCommand clockCommands[] = {
-    { "getenv",			ClockGetenvObjCmd },
-    { "Oldscan",		TclClockOldscanObjCmd },
-    { "ConvertLocalToUTC",	ClockConvertlocaltoutcObjCmd },
-    { "GetDateFields",		ClockGetdatefieldsObjCmd },
-    { "GetJulianDayFromEraYearMonthDay",
-		ClockGetjuliandayfromerayearmonthdayObjCmd },
-    { "GetJulianDayFromEraYearWeekDay",
-		ClockGetjuliandayfromerayearweekdayObjCmd },
-    { "ParseFormatArgs",	ClockParseformatargsObjCmd },
-    { NULL, NULL }
+    {"add",		ClockAddObjCmd,		TclCompileBasicMin1ArgCmd, NULL},
+    {"clicks",		ClockClicksObjCmd,	TclCompileClockClicksCmd,  NULL},
+    {"format",		ClockFormatObjCmd,	TclCompileBasicMin1ArgCmd, NULL},
+    {"getenv",		ClockGetenvObjCmd,	TclCompileBasicMin1ArgCmd, NULL},
+    {"microseconds",	ClockMicrosecondsObjCmd,TclCompileClockReadingCmd, INT2PTR(1)},
+    {"milliseconds",	ClockMillisecondsObjCmd,TclCompileClockReadingCmd, INT2PTR(2)},
+    {"scan",		ClockScanObjCmd,	TclCompileBasicMin1ArgCmd, NULL},
+    {"seconds",		ClockSecondsObjCmd,	TclCompileClockReadingCmd, INT2PTR(3)},
+    {"configure",	  ClockConfigureObjCmd,			NULL, NULL},
+    {"Oldscan",		  TclClockOldscanObjCmd,		NULL, NULL},
+    {"ConvertLocalToUTC", ClockConvertlocaltoutcObjCmd,		NULL, NULL},
+    {"GetDateFields",	  ClockGetdatefieldsObjCmd,		NULL, NULL},
+    {"GetJulianDayFromEraYearMonthDay",
+		ClockGetjuliandayfromerayearmonthdayObjCmd,	NULL, NULL},
+    {"GetJulianDayFromEraYearWeekDay",
+		ClockGetjuliandayfromerayearweekdayObjCmd,	NULL, NULL},
+    {NULL, NULL, NULL, NULL}
 };
 
 /*
@@ -246,22 +204,10 @@ TclClockInit(
     char cmdName[50];		/* Buffer large enough to hold the string
 				 *::tcl::clock::GetJulianDayFromEraYearMonthDay
 				 * plus a terminating NUL. */
+    Command         *cmdPtr;
     ClockClientData *data;
     int i;
 
-    /* Structure of the 'clock' ensemble */
-
-    static const EnsembleImplMap clockImplMap[] = {
-	{"add",          NULL,                    TclCompileBasicMin1ArgCmd, NULL, NULL,       0},
-	{"clicks",       ClockClicksObjCmd,       TclCompileClockClicksCmd,  NULL, NULL,       0},
-	{"format",       NULL,                    TclCompileBasicMin1ArgCmd, NULL, NULL,       0},
-	{"microseconds", ClockMicrosecondsObjCmd, TclCompileClockReadingCmd, NULL, INT2PTR(1), 0},
-	{"milliseconds", ClockMillisecondsObjCmd, TclCompileClockReadingCmd, NULL, INT2PTR(2), 0},
-	{"scan",         NULL,                    TclCompileBasicMin1ArgCmd, NULL, NULL      , 0},
-	{"seconds",      ClockSecondsObjCmd,      TclCompileClockReadingCmd, NULL, INT2PTR(3), 0},
-	{NULL,           NULL,                    NULL,                      NULL, NULL,       0}
-    };
-
     /*
      * Safe interps get [::clock] as alias to a master, so do not need their
      * own copies of the support routines.
@@ -279,27 +225,918 @@ TclClockInit(
     data->refCount = 0;
     data->literals = ckalloc(LIT__END * sizeof(Tcl_Obj*));
     for (i = 0; i < LIT__END; ++i) {
-	data->literals[i] = Tcl_NewStringObj(literals[i], -1);
-	Tcl_IncrRefCount(data->literals[i]);
+	Tcl_InitObjRef(data->literals[i], Tcl_NewStringObj(Literals[i], -1));
     }
+    data->mcLiterals = NULL;
+    data->mcLitIdxs = NULL;
+    data->LastTZEpoch = 0;
+    data->currentYearCentury = ClockDefaultYearCentury;
+    data->yearOfCenturySwitch = ClockDefaultCenturySwitch;
+    data->SystemTimeZone = NULL;
+    data->SystemSetupTZData = NULL;
+    data->GMTSetupTimeZone = NULL;
+    data->GMTSetupTZData = NULL;
+    data->AnySetupTimeZone = NULL;
+    data->AnySetupTZData = NULL;
+    data->LastUnnormSetupTimeZone = NULL;
+    data->LastSetupTimeZone = NULL;
+    data->LastSetupTZData = NULL;
+
+    data->CurrentLocale = NULL;
+    data->CurrentLocaleDict = NULL;
+    data->LastUnnormUsedLocale = NULL;
+    data->LastUsedLocale = NULL;
+    data->LastUsedLocaleDict = NULL;
+
+    data->lastBase.timezoneObj = NULL;
+    data->UTC2Local.timezoneObj = NULL;
+    data->UTC2Local.tzName = NULL;
+    data->Local2UTC.timezoneObj = NULL;
 
     /*
      * Install the commands.
-     * TODO - Let Tcl_MakeEnsemble do this?
      */
 
 #define TCL_CLOCK_PREFIX_LEN 14 /* == strlen("::tcl::clock::") */
     memcpy(cmdName, "::tcl::clock::", TCL_CLOCK_PREFIX_LEN);
     for (clockCmdPtr=clockCommands ; clockCmdPtr->name!=NULL ; clockCmdPtr++) {
+    	ClientData clientData;
+
 	strcpy(cmdName + TCL_CLOCK_PREFIX_LEN, clockCmdPtr->name);
-	data->refCount++;
-	Tcl_CreateObjCommand(interp, cmdName, clockCmdPtr->objCmdProc, data,
-		ClockDeleteCmdProc);
+	if (!(clientData = clockCmdPtr->clientData)) {
+	    clientData = data;
+	    data->refCount++;
+	}
+	cmdPtr = (Command *)Tcl_CreateObjCommand(interp, cmdName, 
+		clockCmdPtr->objCmdProc, clientData,
+		clockCmdPtr->clientData ? NULL : ClockDeleteCmdProc);
+	cmdPtr->compileProc = clockCmdPtr->compileProc ? 
+		clockCmdPtr->compileProc : TclCompileBasicMin0ArgCmd;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockConfigureClear --
+ *
+ *	Clean up cached resp. run-time storages used in clock commands.
+ *
+ *	Shared usage for clean-up (ClockDeleteCmdProc) and "configure -clear".
+ *
+ * Results:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+ClockConfigureClear(
+    ClockClientData *data)
+{
+    ClockFrmScnClearCaches();
+
+    data->LastTZEpoch = 0;
+    Tcl_UnsetObjRef(data->SystemTimeZone);
+    Tcl_UnsetObjRef(data->SystemSetupTZData);
+    Tcl_UnsetObjRef(data->GMTSetupTimeZone);
+    Tcl_UnsetObjRef(data->GMTSetupTZData);
+    Tcl_UnsetObjRef(data->AnySetupTimeZone);
+    Tcl_UnsetObjRef(data->AnySetupTZData);
+    Tcl_UnsetObjRef(data->LastUnnormSetupTimeZone);
+    Tcl_UnsetObjRef(data->LastSetupTimeZone);
+    Tcl_UnsetObjRef(data->LastSetupTZData);
+
+    Tcl_UnsetObjRef(data->CurrentLocale);
+    Tcl_UnsetObjRef(data->CurrentLocaleDict);
+    Tcl_UnsetObjRef(data->LastUnnormUsedLocale);
+    Tcl_UnsetObjRef(data->LastUsedLocale);
+    Tcl_UnsetObjRef(data->LastUsedLocaleDict);
+
+    Tcl_UnsetObjRef(data->lastBase.timezoneObj);
+    Tcl_UnsetObjRef(data->UTC2Local.timezoneObj);
+    Tcl_UnsetObjRef(data->UTC2Local.tzName);
+    Tcl_UnsetObjRef(data->Local2UTC.timezoneObj);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockDeleteCmdProc --
+ *
+ *	Remove a reference to the clock client data, and clean up memory
+ *	when it's all gone.
+ *
+ * Results:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+static void
+ClockDeleteCmdProc(
+    ClientData clientData)	/* Opaque pointer to the client data */
+{
+    ClockClientData *data = clientData;
+    int i;
+
+    if (data->refCount-- <= 1) {
+	for (i = 0; i < LIT__END; ++i) {
+	    Tcl_DecrRefCount(data->literals[i]);
+	}
+	if (data->mcLiterals != NULL) {
+	    for (i = 0; i < MCLIT__END; ++i) {
+		Tcl_DecrRefCount(data->mcLiterals[i]);
+	    }
+	    data->mcLiterals = NULL;
+	}
+	if (data->mcLitIdxs != NULL) {
+	    for (i = 0; i < MCLIT__END; ++i) {
+		Tcl_DecrRefCount(data->mcLitIdxs[i]);
+	    }
+	    data->mcLitIdxs = NULL;
+	}
+
+	ClockConfigureClear(data);
+
+	ckfree(data->literals);
+	ckfree(data);
     }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * NormTimezoneObj --
+ *
+ *	Normalizes the timezone object (used for caching puposes).
+ *
+ *	If already cached time zone could be found, returns this
+ *	object (last setup or last used, system (current) or gmt).
+ *
+ * Results:
+ *	Normalized tcl object pointer.
+ *
+ *----------------------------------------------------------------------
+ */
 
-    /* Make the clock ensemble */
+static inline Tcl_Obj *
+NormTimezoneObj(
+    ClockClientData *dataPtr,  /* Client data containing literal pool */
+    Tcl_Obj *timezoneObj)
+{
+    const char *tz;
+    if ( timezoneObj == dataPtr->LastUnnormSetupTimeZone
+      && dataPtr->LastSetupTimeZone != NULL 
+    ) {
+	return dataPtr->LastSetupTimeZone;
+    }
+    if ( timezoneObj == dataPtr->LastSetupTimeZone
+      || timezoneObj == dataPtr->literals[LIT_GMT]
+      || timezoneObj == dataPtr->SystemTimeZone
+      || timezoneObj == dataPtr->AnySetupTimeZone
+    ) {
+	return timezoneObj;
+    }
 
-    TclMakeEnsemble(interp, "clock", clockImplMap);
+    tz = TclGetString(timezoneObj);
+    if (dataPtr->AnySetupTimeZone != NULL &&
+	(timezoneObj == dataPtr->AnySetupTimeZone
+	   || strcmp(tz, TclGetString(dataPtr->AnySetupTimeZone)) == 0
+	)
+    ) {
+	timezoneObj = dataPtr->AnySetupTimeZone;
+    }
+    else
+    if (dataPtr->SystemTimeZone != NULL &&
+	(timezoneObj == dataPtr->SystemTimeZone
+	   || strcmp(tz, TclGetString(dataPtr->SystemTimeZone)) == 0
+	)
+    ) {
+	timezoneObj = dataPtr->SystemTimeZone;
+    }
+    else
+    if (
+	strcmp(tz, Literals[LIT_GMT]) == 0
+    ) {
+	timezoneObj = dataPtr->literals[LIT_GMT];
+    }
+    return timezoneObj;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockGetSystemLocale --
+ *
+ *	Returns system locale.
+ *
+ *	Executes ::tcl::clock::GetSystemLocale in given interpreter.
+ *
+ * Results:
+ *	Returns system locale tcl object.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline Tcl_Obj *
+ClockGetSystemLocale(
+    ClockClientData *dataPtr,	/* Opaque pointer to literal pool, etc. */
+    Tcl_Interp *interp)		/* Tcl interpreter */
+{
+    if (Tcl_EvalObjv(interp, 1, &dataPtr->literals[LIT_GETSYSTEMLOCALE], 0) != TCL_OK) {
+	return NULL;
+    }
+
+    return Tcl_GetObjResult(interp);
+}
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockGetCurrentLocale --
+ *
+ *	Returns current locale.
+ *
+ *	Executes ::tcl::clock::mclocale in given interpreter.
+ *
+ * Results:
+ *	Returns current locale tcl object.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline Tcl_Obj *
+ClockGetCurrentLocale(
+    ClockClientData *dataPtr,	/* Client data containing literal pool */
+    Tcl_Interp *interp)		/* Tcl interpreter */
+{   
+    if (Tcl_EvalObjv(interp, 1, &dataPtr->literals[LIT_GETCURRENTLOCALE], 0) != TCL_OK) {
+	return NULL;
+    }
+
+    Tcl_SetObjRef(dataPtr->CurrentLocale, Tcl_GetObjResult(interp));
+    Tcl_UnsetObjRef(dataPtr->CurrentLocaleDict);
+
+    return dataPtr->CurrentLocale;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * NormLocaleObj --
+ *
+ *	Normalizes the locale object (used for caching puposes).
+ *
+ *	If already cached locale could be found, returns this
+ *	object (current, system (OS) or last used locales).
+ *
+ * Results:
+ *	Normalized tcl object pointer.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static Tcl_Obj *
+NormLocaleObj(
+    ClockClientData *dataPtr,	/* Client data containing literal pool */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    Tcl_Obj    *localeObj,
+    Tcl_Obj   **mcDictObj)
+{
+    const char *loc;
+    if ( localeObj == NULL || localeObj == dataPtr->CurrentLocale
+      || localeObj == dataPtr->literals[LIT_C] 
+      || localeObj == dataPtr->literals[LIT_CURRENT]
+    ) {
+	if (dataPtr->CurrentLocale == NULL) {
+	    ClockGetCurrentLocale(dataPtr, interp);
+	}
+	*mcDictObj = dataPtr->CurrentLocaleDict;
+	return dataPtr->CurrentLocale;
+    }
+    if ( localeObj == dataPtr->LastUsedLocale
+      || localeObj == dataPtr->LastUnnormUsedLocale
+    ) {
+	*mcDictObj = dataPtr->LastUsedLocaleDict;
+	return dataPtr->LastUsedLocale;
+    }
+
+    loc = TclGetString(localeObj);
+    if ( dataPtr->CurrentLocale != NULL
+      && ( localeObj == dataPtr->CurrentLocale
+       || (localeObj->length == dataPtr->CurrentLocale->length
+	  && strcmp(loc, TclGetString(dataPtr->CurrentLocale)) == 0
+	)
+      )
+    ) {
+	*mcDictObj = dataPtr->CurrentLocaleDict;
+	localeObj = dataPtr->CurrentLocale;
+    }
+    else
+    if ( dataPtr->LastUsedLocale != NULL
+      && ( localeObj == dataPtr->LastUsedLocale
+       || (localeObj->length == dataPtr->LastUsedLocale->length
+	  && strcmp(loc, TclGetString(dataPtr->LastUsedLocale)) == 0
+	)
+      )
+    ) {
+	*mcDictObj = dataPtr->LastUsedLocaleDict;
+	Tcl_SetObjRef(dataPtr->LastUnnormUsedLocale, localeObj);
+	localeObj = dataPtr->LastUsedLocale;
+    }
+    else
+    if (
+	 (localeObj->length == 1 /* C */
+	   && strncasecmp(loc, Literals[LIT_C], localeObj->length) == 0)
+      || (localeObj->length == 7 /* current */
+	   && strncasecmp(loc, Literals[LIT_CURRENT], localeObj->length) == 0)
+    ) {
+	if (dataPtr->CurrentLocale == NULL) {
+	    ClockGetCurrentLocale(dataPtr, interp);
+	}
+	*mcDictObj = dataPtr->CurrentLocaleDict;
+	localeObj = dataPtr->CurrentLocale;
+    } 
+    else 
+    if (
+	 (localeObj->length == 6 /* system */
+	   && strncasecmp(loc, Literals[LIT_SYSTEM], localeObj->length) == 0)
+    ) {
+	Tcl_SetObjRef(dataPtr->LastUnnormUsedLocale, localeObj);
+	localeObj = ClockGetSystemLocale(dataPtr, interp);
+	Tcl_SetObjRef(dataPtr->LastUsedLocale, localeObj);
+	*mcDictObj = NULL;
+    } 
+    else 
+    {
+	*mcDictObj = NULL;
+    }
+    return localeObj;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockMCDict --
+ *
+ *	Retrieves a localized storage dictionary object for the given 
+ *	locale object.
+ *
+ *	This corresponds with call `::tcl::clock::mcget locale`.
+ *	Cached representation stored in options (for further access).
+ *
+ * Results:
+ *	Tcl-object contains smart reference to msgcat dictionary.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_Obj *
+ClockMCDict(ClockFmtScnCmdArgs *opts)
+{
+    ClockClientData *dataPtr = opts->clientData;
+
+    /* if dict not yet retrieved */
+    if (opts->mcDictObj == NULL) {
+
+	/* if locale was not yet used */
+	if ( !(opts->flags & CLF_LOCALE_USED) ) {
+	    
+	    opts->localeObj = NormLocaleObj(opts->clientData, opts->interp,
+		opts->localeObj, &opts->mcDictObj);
+	    
+	    if (opts->localeObj == NULL) {
+		Tcl_SetResult(opts->interp,
+		    "locale not specified and no default locale set", TCL_STATIC);
+		Tcl_SetErrorCode(opts->interp, "CLOCK", "badOption", NULL);
+		return NULL;
+	    }
+	    opts->flags |= CLF_LOCALE_USED;
+
+	    /* check locale literals already available (on demand creation) */
+	    if (dataPtr->mcLiterals == NULL) {
+		int i;
+		dataPtr->mcLiterals = ckalloc(MCLIT__END * sizeof(Tcl_Obj*));
+		for (i = 0; i < MCLIT__END; ++i) {
+		    Tcl_InitObjRef(dataPtr->mcLiterals[i], 
+			Tcl_NewStringObj(MsgCtLiterals[i], -1));
+		}
+	    }
+	}
+
+	if (opts->mcDictObj == NULL) {
+	    Tcl_Obj *callargs[2];
+	    /* get msgcat dictionary - ::tcl::clock::mcget locale */
+	    callargs[0] = dataPtr->literals[LIT_MCGET];
+	    callargs[1] = opts->localeObj;
+
+	    if (Tcl_EvalObjv(opts->interp, 2, callargs, 0) != TCL_OK) {
+		return NULL;
+	    }
+
+	    opts->mcDictObj = Tcl_GetObjResult(opts->interp);
+	    /* be sure that object reference not increases (dict changeable) */
+	    if (opts->mcDictObj->refCount > 0) {
+		/* smart reference (shared dict as object with no ref-counter) */
+		opts->mcDictObj = Tcl_DictObjSmartRef(opts->interp, opts->mcDictObj);
+	    }
+	    if ( opts->localeObj == dataPtr->CurrentLocale ) {
+		Tcl_SetObjRef(dataPtr->CurrentLocaleDict, opts->mcDictObj);
+	    } else if ( opts->localeObj == dataPtr->LastUsedLocale ) {
+		Tcl_SetObjRef(dataPtr->LastUsedLocaleDict, opts->mcDictObj);
+	    } else {
+		Tcl_SetObjRef(dataPtr->LastUsedLocale, opts->localeObj);
+		Tcl_UnsetObjRef(dataPtr->LastUnnormUsedLocale);
+		Tcl_SetObjRef(dataPtr->LastUsedLocaleDict, opts->mcDictObj);
+	    }
+	    Tcl_ResetResult(opts->interp);
+	}
+    }
+
+    return opts->mcDictObj;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockMCGet --
+ *
+ *	Retrieves a msgcat value for the given literal integer mcKey
+ *	from localized storage (corresponding given locale object)
+ *	by mcLiterals[mcKey] (e. g. MONTHS_FULL).
+ *
+ * Results:
+ *	Tcl-object contains localized value.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_Obj *
+ClockMCGet(
+    ClockFmtScnCmdArgs *opts, 
+    int mcKey)
+{
+    ClockClientData *dataPtr = opts->clientData;
+
+    Tcl_Obj *valObj = NULL;
+
+    if (opts->mcDictObj == NULL) {
+	ClockMCDict(opts);
+	if (opts->mcDictObj == NULL)
+	    return NULL;
+    }
+
+    Tcl_DictObjGet(opts->interp, opts->mcDictObj, 
+	dataPtr->mcLiterals[mcKey], &valObj);
+
+    return valObj; /* or NULL in obscure case if Tcl_DictObjGet failed */
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockMCGetIdx --
+ *
+ *	Retrieves an indexed msgcat value for the given literal integer mcKey
+ *	from localized storage (corresponding given locale object)
+ *	by mcLitIdxs[mcKey] (e. g. _IDX_MONTHS_FULL).
+ *
+ * Results:
+ *	Tcl-object contains localized indexed value.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_Obj *
+ClockMCGetIdx(
+    ClockFmtScnCmdArgs *opts, 
+    int mcKey)
+{
+    ClockClientData *dataPtr = opts->clientData;
+
+    Tcl_Obj *valObj = NULL;
+
+    if (opts->mcDictObj == NULL) {
+	ClockMCDict(opts);
+	if (opts->mcDictObj == NULL)
+	    return NULL;
+    }
+
+    /* try to get indices object */
+    if (dataPtr->mcLitIdxs == NULL) {
+	return NULL;
+    }
+    
+    if (Tcl_DictObjGet(NULL, opts->mcDictObj, 
+	dataPtr->mcLitIdxs[mcKey], &valObj) != TCL_OK
+    ) {
+	return NULL;
+    }
+
+    return valObj;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockMCSetIdx --
+ *
+ *	Sets an indexed msgcat value for the given literal integer mcKey
+ *	in localized storage (corresponding given locale object)
+ *	by mcLitIdxs[mcKey] (e. g. _IDX_MONTHS_FULL).
+ *
+ * Results:
+ *	Returns a standard Tcl result.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE int
+ClockMCSetIdx(
+    ClockFmtScnCmdArgs *opts, 
+    int mcKey, Tcl_Obj *valObj)
+{
+    ClockClientData *dataPtr = opts->clientData;
+
+    if (opts->mcDictObj == NULL) {
+	ClockMCDict(opts);
+	if (opts->mcDictObj == NULL)
+	    return TCL_ERROR;
+    }
+
+    /* if literal storage for indices not yet created */
+    if (dataPtr->mcLitIdxs == NULL) {
+	int i;
+	dataPtr->mcLitIdxs = ckalloc(MCLIT__END * sizeof(Tcl_Obj*));
+	for (i = 0; i < MCLIT__END; ++i) {
+	    Tcl_InitObjRef(dataPtr->mcLitIdxs[i], 
+		Tcl_NewStringObj(MsgCtLitIdxs[i], -1));
+	}
+    }
+
+    return Tcl_DictObjPut(opts->interp, opts->mcDictObj, 
+	    dataPtr->mcLitIdxs[mcKey], valObj);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockConfigureObjCmd --
+ *
+ *	This function is invoked to process the Tcl "clock configure" command.
+ *
+ * Usage:
+ *	::tcl::clock::configure ?-option ?value??
+ *
+ * Results:
+ *	Returns a standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+ClockConfigureObjCmd(
+    ClientData clientData,  /* Client data containing literal pool */
+    Tcl_Interp *interp,	    /* Tcl interpreter */
+    int objc,		    /* Parameter count */
+    Tcl_Obj *const objv[])  /* Parameter vector */
+{
+    ClockClientData *dataPtr = clientData;
+    
+    static const char *const options[] = {
+	"-system-tz",	  "-setup-tz",	  "-default-locale",
+	"-clear",
+	"-year-century",  "-century-switch",
+	NULL
+    };
+    enum optionInd {
+	CLOCK_SYSTEM_TZ,  CLOCK_SETUP_TZ, CLOCK_CURRENT_LOCALE,
+	CLOCK_CLEAR_CACHE,
+	CLOCK_YEAR_CENTURY, CLOCK_CENTURY_SWITCH,
+	CLOCK_SETUP_GMT, CLOCK_SETUP_NOP
+    };
+    int optionIndex;		/* Index of an option. */
+    int i;
+
+    for (i = 1; i < objc; i++) {
+	if (Tcl_GetIndexFromObj(interp, objv[i++], options, 
+	    "option", 0, &optionIndex) != TCL_OK) {
+	    Tcl_SetErrorCode(interp, "CLOCK", "badOption",
+		    Tcl_GetString(objv[i-1]), NULL);
+	    return TCL_ERROR;
+	}
+	switch (optionIndex) {
+	case CLOCK_SYSTEM_TZ:
+	if (1) {
+	    /* validate current tz-epoch */
+	    unsigned long lastTZEpoch = TzsetGetEpoch();
+	    if (i < objc) {
+		if (dataPtr->SystemTimeZone != objv[i]) {
+		    Tcl_SetObjRef(dataPtr->SystemTimeZone, objv[i]);
+		    Tcl_UnsetObjRef(dataPtr->SystemSetupTZData);
+		}
+		dataPtr->LastTZEpoch = lastTZEpoch;
+	    } 
+	    if (i+1 >= objc && dataPtr->SystemTimeZone != NULL 
+			 && dataPtr->LastTZEpoch == lastTZEpoch) {
+		Tcl_SetObjResult(interp, dataPtr->SystemTimeZone);
+	    }
+	}
+	break;
+	case CLOCK_SETUP_TZ:
+	    if (i < objc) {
+		/* differentiate GMT and system zones, because used often */
+		Tcl_Obj *timezoneObj = NormTimezoneObj(dataPtr, objv[i]);
+		Tcl_SetObjRef(dataPtr->LastUnnormSetupTimeZone, objv[i]);
+		if (dataPtr->LastSetupTimeZone != timezoneObj) {
+		    Tcl_SetObjRef(dataPtr->LastSetupTimeZone, timezoneObj);
+		    Tcl_UnsetObjRef(dataPtr->LastSetupTZData);
+		}
+		if (timezoneObj == dataPtr->literals[LIT_GMT]) {
+		    optionIndex = CLOCK_SETUP_GMT;
+		} else if (timezoneObj == dataPtr->SystemTimeZone) {
+		    optionIndex = CLOCK_SETUP_NOP;
+		}
+		switch (optionIndex) {
+		case CLOCK_SETUP_GMT:
+		    if (i < objc) {
+			if (dataPtr->GMTSetupTimeZone != timezoneObj) {
+			    Tcl_SetObjRef(dataPtr->GMTSetupTimeZone, timezoneObj);
+			    Tcl_UnsetObjRef(dataPtr->GMTSetupTZData);
+			}
+		    }
+		break;
+		case CLOCK_SETUP_TZ:
+		    if (i < objc) {
+			if (dataPtr->AnySetupTimeZone != timezoneObj) {
+			    Tcl_SetObjRef(dataPtr->AnySetupTimeZone, timezoneObj);
+			    Tcl_UnsetObjRef(dataPtr->AnySetupTZData);
+			}
+		    } 
+		break;
+		}
+	    }
+	    if (i+1 >= objc && dataPtr->LastSetupTimeZone != NULL) {
+		Tcl_SetObjResult(interp, dataPtr->LastSetupTimeZone);
+	    }
+	break;
+	case CLOCK_CURRENT_LOCALE:
+	    if (i < objc) {
+		if (dataPtr->CurrentLocale != objv[i]) {
+		    Tcl_SetObjRef(dataPtr->CurrentLocale, objv[i]);
+		    Tcl_UnsetObjRef(dataPtr->CurrentLocaleDict);
+		}
+	    }
+	    if (i+1 >= objc && dataPtr->CurrentLocale != NULL) {
+		Tcl_SetObjResult(interp, dataPtr->CurrentLocale);
+	    }
+	break;
+	case CLOCK_YEAR_CENTURY:
+	    if (i < objc) {
+		int year;
+		if (TclGetIntFromObj(interp, objv[i], &year) != TCL_OK) {
+		    return TCL_ERROR;
+		}
+		dataPtr->currentYearCentury = year;
+		if (i+1 >= objc) {
+		    Tcl_SetObjResult(interp, objv[i]);
+		}
+		continue;
+	    }
+	    if (i+1 >= objc) {
+		Tcl_SetObjResult(interp, 
+		    Tcl_NewIntObj(dataPtr->currentYearCentury));
+	    }
+	break;
+	case CLOCK_CENTURY_SWITCH:
+	    if (i < objc) {
+		int year;
+		if (TclGetIntFromObj(interp, objv[i], &year) != TCL_OK) {
+		    return TCL_ERROR;
+		}
+		dataPtr->yearOfCenturySwitch = year;
+		Tcl_SetObjResult(interp, objv[i]);
+		continue;
+	    }
+	    if (i+1 >= objc) {
+		Tcl_SetObjResult(interp, 
+		    Tcl_NewIntObj(dataPtr->yearOfCenturySwitch));
+	    }
+	break;
+	case CLOCK_CLEAR_CACHE:
+	    ClockConfigureClear(dataPtr);
+	break;
+	}
+    }
+
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockGetTZData --
+ *
+ *	Retrieves tzdata table for given normalized timezone.
+ *
+ * Results:
+ *	Returns a tcl object with tzdata.
+ *
+ * Side effects:
+ *	The tzdata can be cached in ClockClientData structure.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline Tcl_Obj *
+ClockGetTZData(
+    ClientData clientData,	/* Opaque pointer to literal pool, etc. */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    Tcl_Obj *timezoneObj)	/* Name of the timezone */
+{
+    ClockClientData *dataPtr = clientData;
+    Tcl_Obj **literals = dataPtr->literals;
+    Tcl_Obj *ret, **out = NULL;
+
+    /* if cached (if already setup this one) */
+    if ( dataPtr->LastSetupTZData != NULL
+      && ( timezoneObj == dataPtr->LastSetupTimeZone
+	|| timezoneObj == dataPtr->LastUnnormSetupTimeZone
+      )
+    ) {
+	return dataPtr->LastSetupTZData;
+    }
+
+    /* differentiate GMT and system zones, because used often */
+    /* simple caching, because almost used the tz-data of last timezone
+     */
+    if (timezoneObj == dataPtr->SystemTimeZone) {
+	if (dataPtr->SystemSetupTZData != NULL) {
+	    return dataPtr->SystemSetupTZData;
+	}
+	out = &dataPtr->SystemSetupTZData;
+    }
+    else 
+    if (timezoneObj == dataPtr->GMTSetupTimeZone) {
+	if (dataPtr->GMTSetupTZData != NULL) {
+	    return dataPtr->GMTSetupTZData;
+	}
+	out = &dataPtr->GMTSetupTZData;
+    }
+    else
+    if (timezoneObj == dataPtr->AnySetupTimeZone) {
+	if (dataPtr->AnySetupTZData != NULL) {
+	    return dataPtr->AnySetupTZData;
+	}
+	out = &dataPtr->AnySetupTZData;
+    }
+
+    ret = Tcl_ObjGetVar2(interp, literals[LIT_TZDATA],
+	timezoneObj, TCL_LEAVE_ERR_MSG);
+
+    /* cache using corresponding slot and as last used */
+    if (out != NULL) {
+	Tcl_SetObjRef(*out, ret);
+    }
+    Tcl_SetObjRef(dataPtr->LastSetupTZData, ret);
+    if (dataPtr->LastSetupTimeZone != timezoneObj) {
+	Tcl_SetObjRef(dataPtr->LastSetupTimeZone, timezoneObj);
+	Tcl_UnsetObjRef(dataPtr->LastUnnormSetupTimeZone);
+    }
+    return ret;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockGetSystemTimeZone --
+ *
+ *	Returns system (current) timezone.
+ *
+ *	If system zone not yet cached, it executes ::tcl::clock::GetSystemTimeZone
+ *	in given interpreter and caches its result.
+ *
+ * Results:
+ *	Returns normalized timezone object.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static Tcl_Obj *
+ClockGetSystemTimeZone(
+    ClientData clientData,	/* Opaque pointer to literal pool, etc. */
+    Tcl_Interp *interp)		/* Tcl interpreter */
+{
+    ClockClientData *dataPtr = clientData;
+    Tcl_Obj **literals;
+
+    /* if known (cached and same epoch) - return now */
+    if (dataPtr->SystemTimeZone != NULL 
+	  && dataPtr->LastTZEpoch == TzsetGetEpoch()) {
+	return dataPtr->SystemTimeZone;
+    }
+
+    Tcl_UnsetObjRef(dataPtr->SystemTimeZone);
+    Tcl_UnsetObjRef(dataPtr->SystemSetupTZData);
+
+    literals = dataPtr->literals;
+
+    if (Tcl_EvalObjv(interp, 1, &literals[LIT_GETSYSTEMTIMEZONE], 0) != TCL_OK) {
+	return NULL;
+    }
+    if (dataPtr->SystemTimeZone == NULL) {
+	Tcl_SetObjRef(dataPtr->SystemTimeZone, Tcl_GetObjResult(interp));
+    }
+    return dataPtr->SystemTimeZone;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockSetupTimeZone --
+ *
+ *	Sets up the timezone. Loads tzdata, etc.
+ *
+ * Results:
+ *	Returns normalized timezone object.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_Obj *
+ClockSetupTimeZone(
+    ClientData clientData,	/* Opaque pointer to literal pool, etc. */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    Tcl_Obj *timezoneObj)
+{
+    ClockClientData *dataPtr = clientData;
+    Tcl_Obj **literals = dataPtr->literals;
+    Tcl_Obj *callargs[2];
+
+    /* if cached (if already setup this one) */
+    if ( dataPtr->LastSetupTimeZone != NULL
+      && ( timezoneObj == dataPtr->LastSetupTimeZone
+	|| timezoneObj == dataPtr->LastUnnormSetupTimeZone
+      )
+    ) {
+	return dataPtr->LastSetupTimeZone;
+    }
+
+    /* differentiate GMT and system zones, because used often and already set */
+    timezoneObj = NormTimezoneObj(dataPtr, timezoneObj);
+    if (   timezoneObj == dataPtr->GMTSetupTimeZone
+	|| timezoneObj == dataPtr->SystemTimeZone
+	|| timezoneObj == dataPtr->AnySetupTimeZone
+    ) {
+	return timezoneObj;
+    }
+
+    callargs[0] = literals[LIT_SETUPTIMEZONE];
+    callargs[1] = timezoneObj;
+
+    if (Tcl_EvalObjv(interp, 2, callargs, 0) == TCL_OK) {
+	return dataPtr->LastSetupTimeZone;
+    }
+    return NULL;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockFormatNumericTimeZone --
+ *
+ *	Formats a time zone as +hhmmss
+ *
+ * Parameters:
+ *	z - Time zone in seconds east of Greenwich
+ *
+ * Results:
+ *	Returns the time zone object (formatted in a numeric form)
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Obj * 
+ClockFormatNumericTimeZone(int z) {
+    char sign = '+';
+    int h, m;
+    if ( z < 0 ) {
+	z = -z;
+	sign = '-';
+    }
+    h = z / 3600;
+    z %= 3600;
+    m = z / 60;
+    z %= 60;
+    if (z != 0) {
+	return Tcl_ObjPrintf("%c%02d%02d%02d", sign, h, m, z);
+    }
+    return Tcl_ObjPrintf("%c%02d%02d", sign, h, m);
 }
 
 /*
@@ -311,11 +1148,11 @@ TclClockInit(
  *	is available.
  *
  * Usage:
- *	::tcl::clock::ConvertUTCToLocal dictionary tzdata changeover
+ *	::tcl::clock::ConvertUTCToLocal dictionary timezone changeover
  *
  * Parameters:
  *	dict - Dictionary containing a 'localSeconds' entry.
- *	tzdata - Time zone data
+ *	timezone - Time zone
  *	changeover - Julian Day of the adoption of the Gregorian calendar.
  *
  * Results:
@@ -345,12 +1182,13 @@ ClockConvertlocaltoutcObjCmd(
     int created = 0;
     int status;
 
+    fields.tzName = NULL;
     /*
      * Check params and convert time.
      */
 
     if (objc != 4) {
-	Tcl_WrongNumArgs(interp, 1, objv, "dict tzdata changeover");
+	Tcl_WrongNumArgs(interp, 1, objv, "dict timezone changeover");
 	return TCL_ERROR;
     }
     dict = objv[1];
@@ -363,10 +1201,10 @@ ClockConvertlocaltoutcObjCmd(
 		"found in dictionary", -1));
 	return TCL_ERROR;
     }
-    if ((Tcl_GetWideIntFromObj(interp, secondsObj,
+    if ((TclGetWideIntFromObj(interp, secondsObj,
 	    &fields.localSeconds) != TCL_OK)
 	|| (TclGetIntFromObj(interp, objv[3], &changeover) != TCL_OK)
-	|| ConvertLocalToUTC(interp, &fields, objv[2], changeover)) {
+	|| ConvertLocalToUTC(clientData, interp, &fields, objv[2], changeover)) {
 	return TCL_ERROR;
     }
 
@@ -400,12 +1238,11 @@ ClockConvertlocaltoutcObjCmd(
  *	formatting a date, and populates a dictionary with them.
  *
  * Usage:
- *	::tcl::clock::GetDateFields seconds tzdata changeover
+ *	::tcl::clock::GetDateFields seconds timezone changeover
  *
  * Parameters:
  *	seconds - Time expressed in seconds from the Posix epoch.
- *	tzdata - Time zone data of the time zone in which time is to be
- *		 expressed.
+ *	timezone - Time zone in which time is to be expressed.
  *	changeover - Julian Day Number at which the current locale adopted
  *		     the Gregorian calendar
  *
@@ -434,15 +1271,17 @@ ClockGetdatefieldsObjCmd(
     Tcl_Obj *const *literals = data->literals;
     int changeover;
 
+    fields.tzName = NULL;
+
     /*
      * Check params.
      */
 
     if (objc != 4) {
-	Tcl_WrongNumArgs(interp, 1, objv, "seconds tzdata changeover");
+	Tcl_WrongNumArgs(interp, 1, objv, "seconds timezone changeover");
 	return TCL_ERROR;
     }
-    if (Tcl_GetWideIntFromObj(interp, objv[1], &fields.seconds) != TCL_OK
+    if (TclGetWideIntFromObj(interp, objv[1], &fields.seconds) != TCL_OK
 	    || TclGetIntFromObj(interp, objv[3], &changeover) != TCL_OK) {
 	return TCL_ERROR;
     }
@@ -457,28 +1296,14 @@ ClockGetdatefieldsObjCmd(
 	return TCL_ERROR;
     }
 
-    /*
-     * Convert UTC time to local.
-     */
+    /* Extract fields */
 
-    if (ConvertUTCToLocal(interp, &fields, objv[2], changeover) != TCL_OK) {
+    if (ClockGetDateFields(clientData, interp, &fields, objv[2], 
+	  changeover) != TCL_OK) {
 	return TCL_ERROR;
     }
 
-    /*
-     * Extract Julian day.
-     */
-
-    fields.julianDay = (int) ((fields.localSeconds + JULIAN_SEC_POSIX_EPOCH)
-	    / SECONDS_PER_DAY);
-
-    /*
-     * Convert to Julian or Gregorian calendar.
-     */
-
-    GetGregorianEraYearDay(&fields, changeover);
-    GetMonthDay(&fields);
-    GetYearWeekDay(&fields, changeover);
+    /* Make dict of fields */
 
     dict = Tcl_NewDictObj();
     Tcl_DictObjPut(NULL, dict, literals[LIT_LOCALSECONDS],
@@ -517,6 +1342,58 @@ ClockGetdatefieldsObjCmd(
 /*
  *----------------------------------------------------------------------
  *
+ * ClockGetDateFields --
+ *
+ *	Converts given UTC time (seconds in a TclDateFields structure) 
+ *	to local time and determines the values that clock routines will 
+ *	use in scanning or formatting a date.
+ *
+ * Results:
+ *	Date-time values are stored in structure "fields".
+ *	Returns a standard Tcl result.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+ClockGetDateFields(
+    ClientData clientData,	/* Client data of the interpreter */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    TclDateFields *fields,	/* Pointer to result fields, where
+				 * fields->seconds contains date to extract */
+    Tcl_Obj *timezoneObj,	/* Time zone object or NULL for gmt */
+    int changeover)		/* Julian Day Number */
+{
+    /*
+     * Convert UTC time to local.
+     */
+
+    if (ConvertUTCToLocal(clientData, interp, fields, timezoneObj,
+	    changeover) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    /*
+     * Extract Julian day.
+     */
+
+    fields->julianDay = (int) ((fields->localSeconds + JULIAN_SEC_POSIX_EPOCH)
+	    / SECONDS_PER_DAY);
+
+    /*
+     * Convert to Julian or Gregorian calendar.
+     */
+
+    GetGregorianEraYearDay(fields, changeover);
+    GetMonthDay(fields);
+    GetYearWeekDay(fields, changeover);
+
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * ClockGetjuliandayfromerayearmonthdayObjCmd --
  *
  *	Tcl command that converts a time from era-year-month-day to a Julian
@@ -591,6 +1468,8 @@ ClockGetjuliandayfromerayearmonthdayObjCmd(
     int status;
     int era = 0;
 
+    fields.tzName = NULL;
+
     /*
      * Check params.
      */
@@ -675,6 +1554,8 @@ ClockGetjuliandayfromerayearweekdayObjCmd(
     int status;
     int era = 0;
 
+    fields.tzName = NULL;
+
     /*
      * Check params.
      */
@@ -742,18 +1623,70 @@ ClockGetjuliandayfromerayearweekdayObjCmd(
 
 static int
 ConvertLocalToUTC(
+    ClientData clientData,	/* Client data of the interpreter */
     Tcl_Interp *interp,		/* Tcl interpreter */
     TclDateFields *fields,	/* Fields of the time */
-    Tcl_Obj *tzdata,		/* Time zone data */
+    Tcl_Obj *timezoneObj,	/* Time zone */
     int changeover)		/* Julian Day of the Gregorian transition */
 {
+    ClockClientData *dataPtr = clientData;
+    Tcl_Obj *tzdata;		/* Time zone data */
     int rowc;			/* Number of rows in tzdata */
     Tcl_Obj **rowv;		/* Pointers to the rows */
+    Tcl_WideInt seconds;
+
+    /* fast phase-out for shared GMT-object (don't need to convert UTC 2 UTC) */
+    if (timezoneObj == dataPtr->GMTSetupTimeZone && dataPtr->GMTSetupTimeZone != NULL) {
+	fields->seconds = fields->localSeconds;
+	fields->tzOffset = 0;
+	return TCL_OK;
+    }
+
+    /*
+     * Check cacheable conversion could be used
+     * (last-period Local2UTC cache within the same TZ)
+     */
+    seconds = fields->localSeconds - dataPtr->Local2UTC.tzOffset;
+    if ( timezoneObj == dataPtr->Local2UTC.timezoneObj
+      && ( fields->localSeconds == dataPtr->Local2UTC.localSeconds
+	|| ( seconds >= dataPtr->Local2UTC.rangesVal[0]
+	  && seconds <	dataPtr->Local2UTC.rangesVal[1])
+      )
+      && changeover == dataPtr->Local2UTC.changeover
+    ) {
+	/* the same time zone and offset (UTC time inside the last minute) */
+	fields->tzOffset = dataPtr->Local2UTC.tzOffset;
+	fields->seconds = seconds;
+	return TCL_OK;
+    }
+
+    /*
+     * Check cacheable back-conversion could be used
+     * (last-period UTC2Local cache within the same TZ)
+     */
+    seconds = fields->localSeconds - dataPtr->UTC2Local.tzOffset;
+    if ( timezoneObj == dataPtr->UTC2Local.timezoneObj
+      && ( seconds == dataPtr->UTC2Local.seconds
+	|| ( seconds >= dataPtr->UTC2Local.rangesVal[0]
+	  && seconds <	dataPtr->UTC2Local.rangesVal[1])
+      )
+      && changeover == dataPtr->UTC2Local.changeover
+    ) {
+	/* the same time zone and offset (UTC time inside the last minute) */
+	fields->tzOffset = dataPtr->UTC2Local.tzOffset;
+	fields->seconds = seconds;
+	return TCL_OK;
+    }
 
     /*
      * Unpack the tz data.
      */
 
+    tzdata = ClockGetTZData(clientData, interp, timezoneObj);
+    if (tzdata == NULL) {
+	return TCL_ERROR;
+    }
+
     if (TclListObjGetElements(interp, tzdata, &rowc, &rowv) != TCL_OK) {
 	return TCL_ERROR;
     }
@@ -764,10 +1697,26 @@ ConvertLocalToUTC(
      */
 
     if (rowc == 0) {
-	return ConvertLocalToUTCUsingC(interp, fields, changeover);
+	dataPtr->Local2UTC.rangesVal[0] = 0;
+	dataPtr->Local2UTC.rangesVal[1] = 0;
+
+	if (ConvertLocalToUTCUsingC(interp, fields, changeover) != TCL_OK) {
+	    return TCL_ERROR;
+	};
     } else {
-	return ConvertLocalToUTCUsingTable(interp, fields, rowc, rowv);
+	if (ConvertLocalToUTCUsingTable(interp, fields, rowc, rowv, 
+		dataPtr->Local2UTC.rangesVal) != TCL_OK) {
+	    return TCL_ERROR;
+	};
     }
+
+    /* Cache the last conversion */
+    Tcl_SetObjRef(dataPtr->Local2UTC.timezoneObj, timezoneObj);
+    dataPtr->Local2UTC.localSeconds = fields->localSeconds;
+    dataPtr->Local2UTC.changeover = changeover;
+    dataPtr->Local2UTC.tzOffset = fields->tzOffset;
+
+    return TCL_OK;
 }
 
 /*
@@ -793,7 +1742,8 @@ ConvertLocalToUTCUsingTable(
     Tcl_Interp *interp,		/* Tcl interpreter */
     TclDateFields *fields,	/* Time to convert, with 'seconds' filled in */
     int rowc,			/* Number of points at which time changes */
-    Tcl_Obj *const rowv[])	/* Points at which time changes */
+    Tcl_Obj *const rowv[],	/* Points at which time changes */
+    Tcl_WideInt rangesVal[2])	/* Return bounds for time period */
 {
     Tcl_Obj *row;
     int cellc;
@@ -817,7 +1767,8 @@ ConvertLocalToUTCUsingTable(
     fields->tzOffset = 0;
     fields->seconds = fields->localSeconds;
     while (!found) {
-	row = LookupLastTransition(interp, fields->seconds, rowc, rowv);
+	row = LookupLastTransition(interp, fields->seconds, rowc, rowv,
+		    rangesVal);
 	if ((row == NULL)
 		|| TclListObjGetElements(interp, row, &cellc,
 		    &cellv) != TCL_OK
@@ -842,6 +1793,41 @@ ConvertLocalToUTCUsingTable(
     }
     fields->tzOffset = have[i];
     fields->seconds = fields->localSeconds - fields->tzOffset;
+
+#if 0
+    /* currently unused, test purposes only */
+    /*
+     * Convert back from UTC, if local times are different - wrong local time
+     * (local time seems to be in between DST-hole).
+     */
+    if (fields->tzOffset) {
+
+	int corrOffset;
+	Tcl_WideInt backCompVal;
+	/* check DST-hole interval contains UTC time */
+	TclGetWideIntFromObj(NULL, cellv[0], &backCompVal);
+	if ( fields->seconds >= backCompVal - fields->tzOffset 
+	  && fields->seconds <= backCompVal + fields->tzOffset
+	) {
+	    row = LookupLastTransition(interp, fields->seconds, rowc, rowv);
+	    if (row == NULL ||
+		    TclListObjGetElements(interp, row, &cellc, &cellv) != TCL_OK ||
+		    TclGetIntFromObj(interp, cellv[1], &corrOffset) != TCL_OK) {
+		return TCL_ERROR;
+	    }
+	    if (fields->localSeconds != fields->seconds + corrOffset) {
+		Tcl_Panic("wrong local time %ld by LocalToUTC conversion,"
+		    " local time seems to be in between DST-hole", 
+		    fields->localSeconds);
+		/* correcting offset * /
+		fields->tzOffset -= corrOffset;
+		fields->seconds += fields->tzOffset;
+		*/
+	    }
+	}
+    }
+#endif
+
     return TCL_OK;
 }
 
@@ -943,20 +1929,61 @@ ConvertLocalToUTCUsingC(
  *----------------------------------------------------------------------
  */
 
-static int
+MODULE_SCOPE int
 ConvertUTCToLocal(
+    ClientData clientData,	/* Client data of the interpreter */
     Tcl_Interp *interp,		/* Tcl interpreter */
     TclDateFields *fields,	/* Fields of the time */
-    Tcl_Obj *tzdata,		/* Time zone data */
+    Tcl_Obj *timezoneObj,	/* Time zone */
     int changeover)		/* Julian Day of the Gregorian transition */
 {
+    ClockClientData *dataPtr = clientData;
+    Tcl_Obj *tzdata;		/* Time zone data */
     int rowc;			/* Number of rows in tzdata */
     Tcl_Obj **rowv;		/* Pointers to the rows */
 
+    /* fast phase-out for shared GMT-object (don't need to convert UTC 2 UTC) */
+    if (timezoneObj == dataPtr->GMTSetupTimeZone 
+	&& dataPtr->GMTSetupTimeZone != NULL 
+	&& dataPtr->GMTSetupTZData != NULL
+    ) {
+	fields->localSeconds = fields->seconds;
+	fields->tzOffset = 0;
+	if ( TclListObjGetElements(interp, dataPtr->GMTSetupTZData, &rowc, &rowv) != TCL_OK
+	  || Tcl_ListObjIndex(interp, rowv[0], 3, &fields->tzName) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+	Tcl_IncrRefCount(fields->tzName);
+	return TCL_OK;
+    }
+
+    /*
+     * Check cacheable conversion could be used
+     * (last-period UTC2Local cache within the same TZ)
+     */
+    if ( timezoneObj == dataPtr->UTC2Local.timezoneObj
+      && ( fields->seconds == dataPtr->UTC2Local.seconds
+	|| ( fields->seconds >= dataPtr->UTC2Local.rangesVal[0]
+	  && fields->seconds <	dataPtr->UTC2Local.rangesVal[1])
+      )
+      && changeover == dataPtr->UTC2Local.changeover
+    ) {
+	/* the same time zone and offset (UTC time inside the last minute) */
+	Tcl_SetObjRef(fields->tzName, dataPtr->UTC2Local.tzName);
+	fields->tzOffset = dataPtr->UTC2Local.tzOffset;
+	fields->localSeconds = fields->seconds + fields->tzOffset;
+	return TCL_OK;
+    }
+
     /*
      * Unpack the tz data.
      */
 
+    tzdata = ClockGetTZData(clientData, interp, timezoneObj);
+    if (tzdata == NULL) {
+	return TCL_ERROR;
+    }
+
     if (TclListObjGetElements(interp, tzdata, &rowc, &rowv) != TCL_OK) {
 	return TCL_ERROR;
     }
@@ -967,10 +1994,26 @@ ConvertUTCToLocal(
      */
 
     if (rowc == 0) {
-	return ConvertUTCToLocalUsingC(interp, fields, changeover);
+	dataPtr->UTC2Local.rangesVal[0] = 0;
+	dataPtr->UTC2Local.rangesVal[1] = 0;
+
+	if (ConvertUTCToLocalUsingC(interp, fields, changeover) != TCL_OK) {
+	    return TCL_ERROR;
+	}
     } else {
-	return ConvertUTCToLocalUsingTable(interp, fields, rowc, rowv);
+	if (ConvertUTCToLocalUsingTable(interp, fields, rowc, rowv, 
+		dataPtr->UTC2Local.rangesVal) != TCL_OK) {
+	    return TCL_ERROR;
+	}
     }
+
+    /* Cache the last conversion */
+    Tcl_SetObjRef(dataPtr->UTC2Local.timezoneObj, timezoneObj);
+    dataPtr->UTC2Local.seconds = fields->seconds;
+    dataPtr->UTC2Local.changeover = changeover;
+    dataPtr->UTC2Local.tzOffset = fields->tzOffset;
+    Tcl_SetObjRef(dataPtr->UTC2Local.tzName, fields->tzName);
+    return TCL_OK;
 }
 
 /*
@@ -997,7 +2040,8 @@ ConvertUTCToLocalUsingTable(
     TclDateFields *fields,	/* Fields of the date */
     int rowc,			/* Number of rows in the conversion table
 				 * (>= 1) */
-    Tcl_Obj *const rowv[])	/* Rows of the conversion table */
+    Tcl_Obj *const rowv[],	/* Rows of the conversion table */
+    Tcl_WideInt rangesVal[2])	/* Return bounds for time period */
 {
     Tcl_Obj *row;		/* Row containing the current information */
     int cellc;			/* Count of cells in the row (must be 4) */
@@ -1007,7 +2051,7 @@ ConvertUTCToLocalUsingTable(
      * Look up the nearest transition time.
      */
 
-    row = LookupLastTransition(interp, fields->seconds, rowc, rowv);
+    row = LookupLastTransition(interp, fields->seconds, rowc, rowv, rangesVal);
     if (row == NULL ||
 	    TclListObjGetElements(interp, row, &cellc, &cellv) != TCL_OK ||
 	    TclGetIntFromObj(interp, cellv[1], &fields->tzOffset) != TCL_OK) {
@@ -1018,8 +2062,7 @@ ConvertUTCToLocalUsingTable(
      * Convert the time.
      */
 
-    fields->tzName = cellv[3];
-    Tcl_IncrRefCount(fields->tzName);
+    Tcl_SetObjRef(fields->tzName, cellv[3]);
     fields->localSeconds = fields->seconds + fields->tzOffset;
     return TCL_OK;
 }
@@ -1112,8 +2155,7 @@ ConvertUTCToLocalUsingC(
     if (diff > 0) {
 	sprintf(buffer+5, "%02d", diff);
     }
-    fields->tzName = Tcl_NewStringObj(buffer, -1);
-    Tcl_IncrRefCount(fields->tzName);
+    Tcl_SetObjRef(fields->tzName, Tcl_NewStringObj(buffer, -1));
     return TCL_OK;
 }
 
@@ -1131,24 +2173,25 @@ ConvertUTCToLocalUsingC(
  *----------------------------------------------------------------------
  */
 
-static Tcl_Obj *
+MODULE_SCOPE Tcl_Obj *
 LookupLastTransition(
     Tcl_Interp *interp,		/* Interpreter for error messages */
     Tcl_WideInt tick,		/* Time from the epoch */
     int rowc,			/* Number of rows of tzdata */
-    Tcl_Obj *const *rowv)	/* Rows in tzdata */
+    Tcl_Obj *const *rowv,	/* Rows in tzdata */
+    Tcl_WideInt rangesVal[2])	/* Return bounds for time period */
 {
-    int l;
+    int l = 0;
     int u;
     Tcl_Obj *compObj;
-    Tcl_WideInt compVal;
+    Tcl_WideInt compVal, fromVal = tick, toVal = tick;
 
     /*
      * Examine the first row to make sure we're in bounds.
      */
 
     if (Tcl_ListObjIndex(interp, rowv[0], 0, &compObj) != TCL_OK
-	    || Tcl_GetWideIntFromObj(interp, compObj, &compVal) != TCL_OK) {
+	    || TclGetWideIntFromObj(interp, compObj, &compVal) != TCL_OK) {
 	return NULL;
     }
 
@@ -1158,28 +2201,36 @@ LookupLastTransition(
      */
 
     if (tick < compVal) {
-	return rowv[0];
+	goto done;
     }
 
     /*
      * Binary-search to find the transition.
      */
 
-    l = 0;
     u = rowc-1;
     while (l < u) {
 	int m = (l + u + 1) / 2;
 
 	if (Tcl_ListObjIndex(interp, rowv[m], 0, &compObj) != TCL_OK ||
-		Tcl_GetWideIntFromObj(interp, compObj, &compVal) != TCL_OK) {
+		TclGetWideIntFromObj(interp, compObj, &compVal) != TCL_OK) {
 	    return NULL;
 	}
 	if (tick >= compVal) {
 	    l = m;
+	    fromVal = compVal;
 	} else {
 	    u = m-1;
+	    toVal = compVal;
 	}
     }
+
+done:
+
+    if (rangesVal) {
+	rangesVal[0] = fromVal;
+	rangesVal[1] = toVal;
+    }
     return rowv[l];
 }
 
@@ -1210,6 +2261,8 @@ GetYearWeekDay(
     TclDateFields temp;
     int dayOfFiscalYear;
 
+    temp.tzName = NULL;
+
     /*
      * Find the given date, minus three days, plus one year. That date's
      * iso8601 year is an upper bound on the ISO8601 year of the given date.
@@ -1416,7 +2469,7 @@ GetMonthDay(
  *----------------------------------------------------------------------
  */
 
-static void
+MODULE_SCOPE void
 GetJulianDayFromEraYearWeekDay(
     TclDateFields *fields,	/* Date to convert */
     int changeover)		/* Julian Day Number of the Gregorian
@@ -1426,6 +2479,8 @@ GetJulianDayFromEraYearWeekDay(
 				 * given year */
     TclDateFields firstWeek;
 
+    firstWeek.tzName = NULL;
+
     /*
      * Find January 4 in the ISO8601 year, which will always be in week 1.
      */
@@ -1467,7 +2522,7 @@ GetJulianDayFromEraYearWeekDay(
  *----------------------------------------------------------------------
  */
 
-static void
+MODULE_SCOPE void
 GetJulianDayFromEraYearMonthDay(
     TclDateFields *fields,	/* Date to convert */
     int changeover)		/* Gregorian transition date as a Julian Day */
@@ -1521,9 +2576,9 @@ GetJulianDayFromEraYearMonthDay(
      * See above bug for details. The casts are necessary.
      */
     if (ym1 >= 0)
-        ym1o4 = ym1 / 4;
+	ym1o4 = ym1 / 4;
     else {
-        ym1o4 = - (int) (((unsigned int) -ym1) / 4);
+	ym1o4 = - (int) (((unsigned int) -ym1) / 4);
     }
 #endif
     if (ym1 % 4 < 0) {
@@ -1563,6 +2618,61 @@ GetJulianDayFromEraYearMonthDay(
 /*
  *----------------------------------------------------------------------
  *
+ * GetJulianDayFromEraYearDay --
+ *
+ *	Given era, year, and dayOfYear (in TclDateFields), and the
+ *	Gregorian transition date, computes the Julian Day Number.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Stores day number in 'julianDay'
+ *
+ *----------------------------------------------------------------------
+ */
+
+
+MODULE_SCOPE void
+GetJulianDayFromEraYearDay(
+    TclDateFields *fields,	/* Date to convert */
+    int changeover)		/* Gregorian transition date as a Julian Day */
+{
+    int year, ym1;
+
+    /* Get absolute year number from the civil year */
+    if (fields->era == BCE) {
+	year = 1 - fields->year;
+    } else {
+	year = fields->year;
+    }
+
+    ym1 = year - 1;
+
+    /* Try the Gregorian calendar first. */
+    fields->gregorian = 1;
+    fields->julianDay =
+	1721425
+	+ fields->dayOfYear
+	+ ( 365 * ym1 )
+	+ ( ym1 / 4 )
+	- ( ym1 / 100 )
+	+ ( ym1 / 400 );
+
+    /* If the date is before the Gregorian change, use the Julian calendar. */
+
+    if ( fields->julianDay < changeover ) {
+	fields->gregorian = 0;
+	fields->julianDay =
+	    1721423
+	    + fields->dayOfYear
+	    + ( 365 * ym1 )
+	    + ( ym1 / 4 );
+    }
+}
+/*
+ *----------------------------------------------------------------------
+ *
  * IsGregorianLeapYear --
  *
  *	Tests whether a given year is a leap year, in either Julian or
@@ -1574,16 +2684,14 @@ GetJulianDayFromEraYearMonthDay(
  *----------------------------------------------------------------------
  */
 
-static int
+MODULE_SCOPE int
 IsGregorianLeapYear(
     TclDateFields *fields)	/* Date to test */
 {
-    int year;
+    int year = fields->year;
 
     if (fields->era == BCE) {
-	year = 1 - fields->year;
-    } else {
-	year = fields->year;
+	year = 1 - year;
     }
     if (year%4 != 0) {
 	return 0;
@@ -1757,7 +2865,7 @@ ClockClicksObjCmd(
 	}
 	break;
     default:
-	Tcl_WrongNumArgs(interp, 1, objv, "?-switch?");
+	Tcl_WrongNumArgs(interp, 0, NULL, "clock clicks ?-switch?");
 	return TCL_ERROR;
     }
 
@@ -1774,8 +2882,7 @@ ClockClicksObjCmd(
 #endif
 	break;
     case CLICKS_MICROS:
-	Tcl_GetTime(&now);
-	clicks = ((Tcl_WideInt) now.sec * 1000000) + now.usec;
+	clicks = TclpGetMicroseconds();
 	break;
     }
 
@@ -1811,7 +2918,7 @@ ClockMillisecondsObjCmd(
     Tcl_Time now;
 
     if (objc != 1) {
-	Tcl_WrongNumArgs(interp, 1, objv, NULL);
+	Tcl_WrongNumArgs(interp, 0, NULL, "clock milliseconds");
 	return TCL_ERROR;
     }
     Tcl_GetTime(&now);
@@ -1845,134 +2952,1043 @@ ClockMicrosecondsObjCmd(
     int objc,			/* Parameter count */
     Tcl_Obj *const *objv)	/* Parameter values */
 {
-    Tcl_Time now;
-
     if (objc != 1) {
-	Tcl_WrongNumArgs(interp, 1, objv, NULL);
+	Tcl_WrongNumArgs(interp, 0, NULL, "clock microseconds");
 	return TCL_ERROR;
     }
-    Tcl_GetTime(&now);
-    Tcl_SetObjResult(interp, Tcl_NewWideIntObj(
-	    ((Tcl_WideInt) now.sec * 1000000) + now.usec));
+    Tcl_SetObjResult(interp, Tcl_NewWideIntObj(TclpGetMicroseconds()));
     return TCL_OK;
 }
 
+static inline void
+ClockInitFmtScnArgs(
+    ClientData clientData,
+    Tcl_Interp *interp,
+    ClockFmtScnCmdArgs *opts)
+{
+    memset(opts, 0, sizeof(*opts));
+    opts->clientData = clientData;
+    opts->interp = interp;
+}
+
 /*
  *-----------------------------------------------------------------------------
  *
- * ClockParseformatargsObjCmd --
+ * ClockParseFmtScnArgs --
  *
- *	Parses the arguments for [clock format].
+ *	Parses the arguments for [clock scan] and [clock format].
  *
  * Results:
- *	Returns a standard Tcl result, whose value is a four-element list
- *	comprising the time format, the locale, and the timezone.
- *
- * This function exists because the loop that parses the [clock format]
- * options is a known performance "hot spot", and is implemented in an effort
- * to speed that particular code up.
+ *	Returns a standard Tcl result, and stores parsed options
+ *	(format, the locale, timezone and base) in structure "opts".
  *
  *-----------------------------------------------------------------------------
  */
 
+#define CLC_FMT_ARGS	(0)
+#define CLC_SCN_ARGS	(1 << 0)
+#define CLC_ADD_ARGS	(1 << 1)
+
 static int
-ClockParseformatargsObjCmd(
-    ClientData clientData,	/* Client data containing literal pool */
-    Tcl_Interp *interp,		/* Tcl interpreter */
+ClockParseFmtScnArgs(
+    register
+    ClockFmtScnCmdArgs *opts,	/* Result vector: format, locale, timezone... */
+    TclDateFields      *date,	/* Extracted date-time corresponding base 
+				 * (by scan or add) resp. clockval (by format) */
     int objc,			/* Parameter count */
-    Tcl_Obj *const objv[])	/* Parameter vector */
-{
-    ClockClientData *dataPtr = clientData;
-    Tcl_Obj **litPtr = dataPtr->literals;
-    Tcl_Obj *results[3];	/* Format, locale and timezone */
-#define formatObj results[0]
-#define localeObj results[1]
-#define timezoneObj results[2]
+    Tcl_Obj *const objv[],	/* Parameter vector */
+    int		flags		/* Flags, differentiates between format, scan, add */
+) {
+    Tcl_Interp	    *interp =  opts->interp;
+    ClockClientData *dataPtr = opts->clientData;
     int gmtFlag = 0;
-    static const char *const options[] = { /* Command line options expected */
+    static const char *const options[] = {
 	"-format",	"-gmt",		"-locale",
-	"-timezone",	NULL };
+	"-timezone",	"-base",	NULL
+    };
     enum optionInd {
-	CLOCK_FORMAT_FORMAT,	CLOCK_FORMAT_GMT,	CLOCK_FORMAT_LOCALE,
-	CLOCK_FORMAT_TIMEZONE
+	CLC_ARGS_FORMAT,    CLC_ARGS_GMT,	CLC_ARGS_LOCALE,
+	CLC_ARGS_TIMEZONE,  CLC_ARGS_BASE
     };
     int optionIndex;		/* Index of an option. */
     int saw = 0;		/* Flag == 1 if option was seen already. */
-    Tcl_WideInt clockVal;	/* Clock value - just used to parse. */
     int i;
+    Tcl_WideInt baseVal;	/* Base time, expressed in seconds from the Epoch */
 
-    /*
-     * Args consist of a time followed by keyword-value pairs.
-     */
-
-    if (objc < 2 || (objc % 2) != 0) {
-	Tcl_WrongNumArgs(interp, 0, objv,
-		"clock format clockval ?-format string? "
-		"?-gmt boolean? ?-locale LOCALE? ?-timezone ZONE?");
-	Tcl_SetErrorCode(interp, "CLOCK", "wrongNumArgs", NULL);
-	return TCL_ERROR;
+    /* clock value (as current base) */
+    if ( !(flags & (CLC_SCN_ARGS)) ) {
+	opts->baseObj = objv[1];
+	saw |= (1 << CLC_ARGS_BASE);
     }
 
     /*
      * Extract values for the keywords.
      */
 
-    formatObj = litPtr[LIT__DEFAULT_FORMAT];
-    localeObj = litPtr[LIT_C];
-    timezoneObj = litPtr[LIT__NIL];
     for (i = 2; i < objc; i+=2) {
-	if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0,
-		&optionIndex) != TCL_OK) {
-	    Tcl_SetErrorCode(interp, "CLOCK", "badOption",
-		    Tcl_GetString(objv[i]), NULL);
-	    return TCL_ERROR;
+	/* bypass integers (offsets) by "clock add" */
+	if (flags & CLC_ADD_ARGS) {
+	    Tcl_WideInt num;
+	    if (TclGetWideIntFromObj(NULL, objv[i], &num) == TCL_OK) {
+		continue;
+	    }
+	}
+	/* get option */
+	if (Tcl_GetIndexFromObj(interp, objv[i], options, 
+	    "option", 0, &optionIndex) != TCL_OK) {
+	    goto badOption;
+	}
+	/* if already specified */
+	if (saw & (1 << optionIndex)) {
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		"bad option \"%s\": doubly present", 
+		TclGetString(objv[i]))
+	    );
+	    goto badOption;
 	}
 	switch (optionIndex) {
-	case CLOCK_FORMAT_FORMAT:
-	    formatObj = objv[i+1];
+	case CLC_ARGS_FORMAT:
+	    if (flags & CLC_ADD_ARGS) {
+		goto badOptionMsg;
+	    }
+	    opts->formatObj = objv[i+1];
 	    break;
-	case CLOCK_FORMAT_GMT:
+	case CLC_ARGS_GMT:
 	    if (Tcl_GetBooleanFromObj(interp, objv[i+1], &gmtFlag) != TCL_OK){
 		return TCL_ERROR;
 	    }
 	    break;
-	case CLOCK_FORMAT_LOCALE:
-	    localeObj = objv[i+1];
+	case CLC_ARGS_LOCALE:
+	    opts->localeObj = objv[i+1];
+	    break;
+	case CLC_ARGS_TIMEZONE:
+	    opts->timezoneObj = objv[i+1];
 	    break;
-	case CLOCK_FORMAT_TIMEZONE:
-	    timezoneObj = objv[i+1];
+	case CLC_ARGS_BASE:
+	    if ( !(flags & (CLC_SCN_ARGS)) ) {
+		goto badOptionMsg;
+	    }
+	    opts->baseObj = objv[i+1];
 	    break;
 	}
-	saw |= 1 << optionIndex;
+	saw |= (1 << optionIndex);
     }
 
     /*
      * Check options.
      */
 
-    if (Tcl_GetWideIntFromObj(interp, objv[1], &clockVal) != TCL_OK) {
-	return TCL_ERROR;
-    }
-    if ((saw & (1 << CLOCK_FORMAT_GMT))
-	    && (saw & (1 << CLOCK_FORMAT_TIMEZONE))) {
-	Tcl_SetObjResult(interp, litPtr[LIT_CANNOT_USE_GMT_AND_TIMEZONE]);
+    if ((saw & (1 << CLC_ARGS_GMT))
+	    && (saw & (1 << CLC_ARGS_TIMEZONE))) {
+	Tcl_SetResult(interp, "cannot use -gmt and -timezone in same call", TCL_STATIC);
 	Tcl_SetErrorCode(interp, "CLOCK", "gmtWithTimezone", NULL);
 	return TCL_ERROR;
     }
     if (gmtFlag) {
-	timezoneObj = litPtr[LIT_GMT];
+	opts->timezoneObj = dataPtr->literals[LIT_GMT];
+    }
+
+    /* If time zone not specified use system time zone */
+
+    if ( opts->timezoneObj == NULL
+      || TclGetString(opts->timezoneObj) == NULL 
+      || opts->timezoneObj->length == 0
+    ) {
+	opts->timezoneObj = ClockGetSystemTimeZone(opts->clientData, interp);
+	if (opts->timezoneObj == NULL) {
+	    return TCL_ERROR;
+	}
+    }
+
+    /* Setup timezone (normalize object if needed and load TZ on demand) */
+
+    opts->timezoneObj = ClockSetupTimeZone(opts->clientData, interp, opts->timezoneObj);
+    if (opts->timezoneObj == NULL) {
+	return TCL_ERROR;
+    }
+
+    /* Base (by scan or add) or clock value (by format) */
+
+    if (opts->baseObj != NULL) {
+	register Tcl_Obj *baseObj = opts->baseObj;
+	/* bypass integer recognition if looks like option "-now" */
+	if (
+	    (baseObj->length == 4 && baseObj->bytes && *(baseObj->bytes+1) == 'n') ||
+	    TclGetWideIntFromObj(NULL, baseObj, &baseVal) != TCL_OK
+	) {
+
+	    /* we accept "-now" as current date-time */
+	    static const char *const nowOpts[] = {
+		"-now", NULL
+	    };
+	    int idx;
+	    if (Tcl_GetIndexFromObj(NULL, baseObj, nowOpts, "seconds or -now",
+		    TCL_EXACT, &idx) == TCL_OK
+	    ) {
+		goto baseNow;
+	    }
+
+	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+		    "expected integer but got \"%s\"",
+		    Tcl_GetString(baseObj)));
+	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "INTEGER", NULL);
+	    i = 1;
+	    goto badOption;
+	}
+	/*
+	 * seconds could be an unsigned number that overflowed. Make sure
+	 * that it isn't.
+	 */
+
+	if (baseObj->typePtr == &tclBignumType) {
+	    Tcl_SetObjResult(interp, dataPtr->literals[LIT_INTEGER_VALUE_TOO_LARGE]);
+	    return TCL_ERROR;
+	}
+
+    } else {
+
+baseNow:
+	{
+	    Tcl_Time now;
+	    Tcl_GetTime(&now);
+	    baseVal = (Tcl_WideInt) now.sec;
+	}
+    }
+
+    /*
+     * Extract year, month and day from the base time for the parser to use as
+     * defaults
+     */
+
+    /* check base fields already cached (by TZ, last-second cache) */
+    if ( dataPtr->lastBase.timezoneObj == opts->timezoneObj
+      && dataPtr->lastBase.Date.seconds == baseVal) {
+	memcpy(date, &dataPtr->lastBase.Date, ClockCacheableDateFieldsSize);
+    } else {
+	/* extact fields from base */
+	date->seconds = baseVal;
+	if (ClockGetDateFields(opts->clientData, interp, date, opts->timezoneObj,
+	      GREGORIAN_CHANGE_DATE) != TCL_OK) { /* TODO - GREGORIAN_CHANGE_DATE should be locale-dependent */
+	    return TCL_ERROR;
+	}
+	/* cache last base */
+	memcpy(&dataPtr->lastBase.Date, date, ClockCacheableDateFieldsSize);
+	Tcl_SetObjRef(dataPtr->lastBase.timezoneObj, opts->timezoneObj);
+    }
+
+    return TCL_OK;
+
+badOptionMsg: 
+
+    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+	"bad option \"%s\": unexpected for command \"%s\"",
+	TclGetString(objv[i]), TclGetString(objv[0]))
+    );
+
+badOption:
+
+    Tcl_SetErrorCode(interp, "CLOCK", "badOption",
+	    i < objc ? Tcl_GetString(objv[i]) : NULL, NULL);
+    
+    return TCL_ERROR;
+}
+
+/*----------------------------------------------------------------------
+ *
+ * ClockFormatObjCmd -- , clock format --
+ *
+ *	This function is invoked to process the Tcl "clock format" command.
+ *
+ *	Formats a count of seconds since the Posix Epoch as a time of day.
+ *
+ *	The 'clock format' command formats times of day for output.  Refer 
+ *	to the user documentation to see what it does.
+ *
+ * Results:
+ *	Returns a standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+ClockFormatObjCmd(
+    ClientData clientData,	/* Client data containing literal pool */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    int objc,			/* Parameter count */
+    Tcl_Obj *const objv[])	/* Parameter values */
+{
+    ClockClientData *dataPtr = clientData;
+
+    int ret;
+    ClockFmtScnCmdArgs opts;	/* Format, locale, timezone and base */
+    DateFormat	    dateFmt;	/* Common structure used for formatting */
+
+    /* even number of arguments */
+    if ((objc & 1) == 1) {
+	Tcl_WrongNumArgs(interp, 0, NULL, "clock format clockval|-now "
+	    "?-format string? "
+	    "?-gmt boolean? "
+	    "?-locale LOCALE? ?-timezone ZONE?");
+	Tcl_SetErrorCode(interp, "CLOCK", "wrongNumArgs", NULL);
+	return TCL_ERROR;
+    }
+
+    memset(&dateFmt, 0, sizeof(dateFmt));
+
+    /*
+     * Extract values for the keywords.
+     */
+
+    ClockInitFmtScnArgs(clientData, interp, &opts);
+    ret = ClockParseFmtScnArgs(&opts, &dateFmt.date, objc, objv,
+	    CLC_FMT_ARGS);
+    if (ret != TCL_OK) {
+	goto done;
+    }
+
+    /* Default format */
+    if (opts.formatObj == NULL) {
+	opts.formatObj = dataPtr->literals[LIT__DEFAULT_FORMAT];
+    }
+
+    /* Use compiled version of Format - */
+
+    ret = ClockFormat(&dateFmt, &opts);
+
+done:
+
+    Tcl_UnsetObjRef(dateFmt.date.tzName);
+
+    if (ret != TCL_OK) {
+	return ret;
+    }
+
+    return TCL_OK;
+}
+
+/*----------------------------------------------------------------------
+ *
+ * ClockScanObjCmd -- , clock scan --
+ *
+ *	This function is invoked to process the Tcl "clock scan" command.
+ *
+ *	Inputs a count of seconds since the Posix Epoch as a time of day.
+ *
+ *	The 'clock scan' command scans times of day on input. Refer to the
+ *	user documentation to see what it does.
+ *
+ * Results:
+ *	Returns a standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+ClockScanObjCmd(
+    ClientData clientData,	/* Client data containing literal pool */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    int objc,			/* Parameter count */
+    Tcl_Obj *const objv[])	/* Parameter values */
+{
+    int ret;
+    ClockFmtScnCmdArgs opts;	/* Format, locale, timezone and base */
+    DateInfo	    yy;		/* Common structure used for parsing */
+    DateInfo	   *info = &yy;
+
+    /* even number of arguments */
+    if ((objc & 1) == 1) {
+	Tcl_WrongNumArgs(interp, 0, NULL, "clock scan string "
+	    "?-base seconds? "
+	    "?-format string? "
+	    "?-gmt boolean? "
+	    "?-locale LOCALE? ?-timezone ZONE?");
+	Tcl_SetErrorCode(interp, "CLOCK", "wrongNumArgs", NULL);
+	return TCL_ERROR;
+    }
+
+    ClockInitDateInfo(&yy);
+    
+    /*
+     * Extract values for the keywords.
+     */
+
+    ClockInitFmtScnArgs(clientData, interp, &opts);
+    ret = ClockParseFmtScnArgs(&opts, &yy.date, objc, objv,
+	    CLC_SCN_ARGS);
+    if (ret != TCL_OK) {
+	goto done;
+    }
+
+    /* seconds are in localSeconds (relative base date), so reset time here */
+    yyHour = 0; yyMinutes = 0; yySeconds = 0; yyMeridian = MER24;
+
+    /* If free scan */
+    if (opts.formatObj == NULL) {
+	/* Use compiled version of FreeScan - */
+
+	/* [SB] TODO: Perhaps someday we'll localize the legacy code. Right now, it's not localized. */
+	if (opts.localeObj != NULL) {
+	    Tcl_SetResult(interp,
+		"legacy [clock scan] does not support -locale", TCL_STATIC);
+	    Tcl_SetErrorCode(interp, "CLOCK", "flagWithLegacyFormat", NULL);
+	    return TCL_ERROR;
+	}
+	ret = ClockFreeScan(&yy, objv[1], &opts);
+    } 
+    else {
+	/* Use compiled version of Scan - */
+
+	ret = ClockScan(&yy, objv[1], &opts);
+    }
+
+    /* Convert date info structure into UTC seconds */
+
+    if (ret == TCL_OK) {
+	ret = ClockScanCommit(clientData, &yy, &opts);
+    }
+
+done:
+
+    Tcl_UnsetObjRef(yy.date.tzName);
+
+    if (ret != TCL_OK) {
+	return ret;
+    }
+
+    Tcl_SetObjResult(interp, Tcl_NewWideIntObj(yy.date.seconds));
+    return TCL_OK;
+}
+
+/*----------------------------------------------------------------------
+ *
+ * ClockScanCommit --
+ *
+ *	Converts date info structure into UTC seconds.
+ *
+ * Results:
+ *	Returns a standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+ClockScanCommit(
+    ClientData clientData,	/* Client data containing literal pool */
+    register DateInfo  *info,	/* Clock scan info structure */
+    register
+    ClockFmtScnCmdArgs *opts)	/* Format, locale, timezone and base */
+{
+    /* If needed assemble julianDay using year, month, etc. */
+    if (info->flags & CLF_ASSEMBLE_JULIANDAY) {
+	if ((info->flags & CLF_ISO8601)) {
+	    GetJulianDayFromEraYearWeekDay(&yydate, GREGORIAN_CHANGE_DATE);
+	}
+	else
+	if (!(info->flags & CLF_DAYOFYEAR)) {
+	    GetJulianDayFromEraYearMonthDay(&yydate, GREGORIAN_CHANGE_DATE);
+	} else {
+	    GetJulianDayFromEraYearDay(&yydate, GREGORIAN_CHANGE_DATE);
+	}
+    }
+
+    /* some overflow checks, if not extended */
+    if (!(opts->flags & CLF_EXTENDED)) {
+	if (yydate.julianDay > 5373484) {
+	    Tcl_SetObjResult(opts->interp, Tcl_NewStringObj(
+		"requested date too large to represent", -1));
+	    Tcl_SetErrorCode(opts->interp, "CLOCK", "dateTooLarge", NULL);
+	    return TCL_ERROR;
+	}
+    }
+
+    /* Local seconds to UTC (stored in yydate.seconds) */
+
+    if (info->flags & (CLF_ASSEMBLE_SECONDS|CLF_ASSEMBLE_JULIANDAY)) {
+	yydate.localSeconds =
+	    -210866803200L
+	    + ( SECONDS_PER_DAY * (Tcl_WideInt)yydate.julianDay )
+	    + ( yySeconds % SECONDS_PER_DAY );
+    }
+
+    if (info->flags & (CLF_ASSEMBLE_SECONDS|CLF_ASSEMBLE_JULIANDAY|CLF_LOCALSEC)) {
+	if (ConvertLocalToUTC(clientData, opts->interp, &yydate, opts->timezoneObj, 
+	      GREGORIAN_CHANGE_DATE) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+    }
+
+    /* Increment UTC seconds with relative time */
+    
+    yydate.seconds += yyRelSeconds;
+
+    return TCL_OK;
+}
+
+/*----------------------------------------------------------------------
+ *
+ * ClockFreeScan --
+ *
+ *	Used by ClockScanObjCmd for free scanning without format.
+ *
+ * Results:
+ *	Returns a standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+ClockFreeScan(
+    register
+    DateInfo	       *info,	/* Date fields used for parsing & converting
+				 * simultaneously a yy-parse structure of the 
+				 * TclClockFreeScan */	  
+    Tcl_Obj *strObj,		/* String containing the time to scan */
+    ClockFmtScnCmdArgs *opts)	/* Command options */
+{
+    Tcl_Interp	    *interp =  opts->interp;
+    ClockClientData *dataPtr = opts->clientData;
+
+    int ret = TCL_ERROR;
+
+    /*
+     * Parse the date. The parser will fill a structure "info" with date,
+     * time, time zone, relative month/day/seconds, relative weekday, ordinal
+     * month.
+     * Notice that many yy-defines point to values in the "info" or "date" 
+     * structure, e. g. yySeconds -> info->date.secondOfDay or 
+     *			yySeconds -> info->date.month (same as yydate.month)
+     */
+    yyInput = Tcl_GetString(strObj);
+
+    if (TclClockFreeScan(interp, info) != TCL_OK) {
+	Tcl_Obj *msg = Tcl_NewObj();
+	Tcl_AppendPrintfToObj(msg, "unable to convert date-time string \"%s\": %s", 
+	    Tcl_GetString(strObj), TclGetString(Tcl_GetObjResult(interp)));
+	Tcl_SetObjResult(interp, msg);
+	goto done;
+    }
+
+    /*
+     * If the caller supplied a date in the string, update the date with
+     * the value. If the caller didn't specify a time with the date, default to
+     * midnight.
+     */
+
+    if (yyHaveDate) {
+	if (yyYear < 100) {
+	    if (yyYear >= dataPtr->yearOfCenturySwitch) {
+		yyYear -= 100;
+	    }
+	    yyYear += dataPtr->currentYearCentury;
+	}
+	yydate.era = CE;
+	if (yyHaveTime == 0) {
+	    yyHaveTime = -1;
+	}
+	info->flags |= CLF_ASSEMBLE_JULIANDAY|CLF_ASSEMBLE_SECONDS;
+    }
+
+    /*
+     * If the caller supplied a time zone in the string, make it into a time 
+     * zone indicator of +-hhmm and setup this time zone.
+     */
+
+    if (yyHaveZone) {
+	Tcl_Obj *tzObjStor = NULL;
+	int minEast = -yyTimezone;
+	int dstFlag = 1 - yyDSTmode;
+	tzObjStor = ClockFormatNumericTimeZone(
+			  60 * minEast + 3600 * dstFlag);
+	Tcl_IncrRefCount(tzObjStor);
+
+	opts->timezoneObj = ClockSetupTimeZone(dataPtr, interp, tzObjStor);
+
+	Tcl_DecrRefCount(tzObjStor);
+	if (opts->timezoneObj == NULL) {
+	    goto done;
+	}
+
+	// Tcl_SetObjRef(yydate.tzName, opts->timezoneObj);
+
+	info->flags |= CLF_ASSEMBLE_SECONDS;
+    }
+    
+    /* 
+     * Assemble date, time, zone into seconds-from-epoch
+     */
+
+    if (yyHaveTime == -1) {
+	yySeconds = 0;
+	info->flags |= CLF_ASSEMBLE_SECONDS;
+    }
+    else
+    if (yyHaveTime) {
+	yySeconds = ToSeconds(yyHour, yyMinutes,
+			    yySeconds, yyMeridian);
+	info->flags |= CLF_ASSEMBLE_SECONDS;
+    } 
+    else 
+    if ( (yyHaveDay && !yyHaveDate)
+	    || yyHaveOrdinalMonth
+	    || ( yyHaveRel
+		&& ( yyRelMonth != 0
+		     || yyRelDay != 0 ) )
+    ) {
+	yySeconds = 0;
+	info->flags |= CLF_ASSEMBLE_SECONDS;
+    } 
+    else {
+	yySeconds = yydate.localSeconds % SECONDS_PER_DAY;
     }
 
     /*
-     * Return options as a list.
+     * Do relative times
      */
 
-    Tcl_SetObjResult(interp, Tcl_NewListObj(3, results));
+    ret = ClockCalcRelTime(info, opts);
+
+    /* Free scanning completed - date ready */
+
+done:
+
+    return ret;
+}
+
+/*----------------------------------------------------------------------
+ *
+ * ClockCalcRelTime --
+ *
+ *	Used for calculating of relative times.
+ *
+ * Results:
+ *	Returns a standard Tcl result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+int
+ClockCalcRelTime(
+    register
+    DateInfo	       *info,	/* Date fields used for converting */
+    ClockFmtScnCmdArgs *opts)	/* Command options */
+{
+    /*
+     * Because some calculations require in-between conversion of the
+     * julian day, we can repeat this processing multiple times 
+     */
+repeat_rel:
+
+    if (yyHaveRel) {
+
+	/* 
+	 * Relative conversion normally possible in UTC time only, because
+	 * of possible wrong local time increment if ignores in-between DST-hole.
+	 * (see test-cases clock-34.53, clock-34.54).
+	 * So increment date in julianDay, but time inside day in UTC (seconds).
+	 */
+
+	/* add months (or years in months) */
+
+	if (yyRelMonth != 0) {
+	    int m, h;
+
+	    /* if needed extract year, month, etc. again */
+	    if (info->flags & CLF_ASSEMBLE_DATE) {
+		GetGregorianEraYearDay(&yydate, GREGORIAN_CHANGE_DATE);
+		GetMonthDay(&yydate);
+		GetYearWeekDay(&yydate, GREGORIAN_CHANGE_DATE);
+		info->flags &= ~CLF_ASSEMBLE_DATE;
+	    }
+
+	    /* add the requisite number of months */
+	    yyMonth += yyRelMonth - 1;
+	    yyYear += yyMonth / 12;
+	    m = yyMonth % 12;
+	    yyMonth = m + 1;
+
+	    /* if the day doesn't exist in the current month, repair it */
+	    h = hath[IsGregorianLeapYear(&yydate)][m];
+	    if (yyDay > h) {
+		yyDay = h;
+	    }
+
+	    /* on demand (lazy) assemble julianDay using new year, month, etc. */
+	    info->flags |= CLF_ASSEMBLE_JULIANDAY|CLF_ASSEMBLE_SECONDS;
+
+	    yyRelMonth = 0;
+	}
+
+	/* add days (or other parts aligned to days) */
+	if (yyRelDay) {
+
+	    /* assemble julianDay using new year, month, etc. */
+	    if (info->flags & CLF_ASSEMBLE_JULIANDAY) {
+		GetJulianDayFromEraYearMonthDay(&yydate, GREGORIAN_CHANGE_DATE);
+		info->flags &= ~CLF_ASSEMBLE_JULIANDAY;
+	    }
+	    yydate.julianDay += yyRelDay;
+	    
+	    /* julianDay was changed, on demand (lazy) extract year, month, etc. again */
+	    info->flags |= CLF_ASSEMBLE_DATE|CLF_ASSEMBLE_SECONDS;
+
+	    yyRelDay = 0;
+	}
+
+	/* relative time (seconds), if exceeds current date, do the day conversion and
+	 * leave rest of the increment in yyRelSeconds to add it hereafter in UTC seconds */
+	if (yyRelSeconds) {
+	    int newSecs = yySeconds + yyRelSeconds;
+	       
+	    /* if seconds increment outside of current date, increment day */
+	    if (newSecs / SECONDS_PER_DAY != yySeconds / SECONDS_PER_DAY) {
+		
+		yyRelDay += newSecs / SECONDS_PER_DAY;
+		yySeconds = 0;		    
+		yyRelSeconds = newSecs % SECONDS_PER_DAY;
+
+		goto repeat_rel;
+	    }
+	}
+
+	yyHaveRel = 0;
+    }
+
+    /*
+     * Do relative (ordinal) month
+     */
+
+    if (yyHaveOrdinalMonth) {
+	int monthDiff;
+
+	/* if needed extract year, month, etc. again */
+	if (info->flags & CLF_ASSEMBLE_DATE) {
+	    GetGregorianEraYearDay(&yydate, GREGORIAN_CHANGE_DATE);
+	    GetMonthDay(&yydate);
+	    GetYearWeekDay(&yydate, GREGORIAN_CHANGE_DATE);
+	    info->flags &= ~CLF_ASSEMBLE_DATE;
+	}
+
+	if (yyMonthOrdinalIncr > 0) {
+	    monthDiff = yyMonthOrdinal - yyMonth;
+	    if (monthDiff <= 0) {
+		monthDiff += 12;
+	    }
+	    yyMonthOrdinalIncr--;
+	} else {
+	    monthDiff = yyMonth - yyMonthOrdinal;
+	    if (monthDiff >= 0) {
+		monthDiff -= 12;
+	    }
+	    yyMonthOrdinalIncr++;
+	}
+
+	/* process it further via relative times */
+	yyHaveRel++;
+	yyYear += yyMonthOrdinalIncr;
+	yyRelMonth += monthDiff;
+	yyHaveOrdinalMonth = 0;
+
+	info->flags |= CLF_ASSEMBLE_JULIANDAY|CLF_ASSEMBLE_SECONDS;
+
+	goto repeat_rel;
+    }
+
+    /*
+     * Do relative weekday
+     */
+
+    if (yyHaveDay && !yyHaveDate) {
+
+	/* if needed assemble julianDay now */
+	if (info->flags & CLF_ASSEMBLE_JULIANDAY) {
+	    GetJulianDayFromEraYearMonthDay(&yydate, GREGORIAN_CHANGE_DATE);
+	    info->flags &= ~CLF_ASSEMBLE_JULIANDAY;
+	}
+
+	yydate.era = CE;
+	yydate.julianDay = WeekdayOnOrBefore(yyDayNumber, yydate.julianDay + 6)
+		    + 7 * yyDayOrdinal;
+	if (yyDayOrdinal > 0) {
+	    yydate.julianDay -= 7;
+	}
+	info->flags |= CLF_ASSEMBLE_DATE|CLF_ASSEMBLE_SECONDS;
+    }
+
     return TCL_OK;
+}
+
+
+/*----------------------------------------------------------------------
+ *
+ * ClockWeekdaysOffs --
+ *
+ *	Get offset in days for the number of week days corresponding the
+ *	given day of week (skipping Saturdays and Sundays).
+ *	
+ *
+ * Results:
+ *	Returns a day increment adjusted the given weekdays
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline int
+ClockWeekdaysOffs(
+    register int dayOfWeek,
+    register int offs)
+{
+    register int weeks, resDayOfWeek;
+
+    /* offset in days */
+    weeks = offs / 5;
+    offs = offs % 5;
+    /* compiler fix for negative offs - wrap (0, -1) -> (-1, 4) */
+    if (offs < 0) {
+	weeks--;
+	offs = 5 + offs;
+    }
+    offs += 7 * weeks;
+
+    /* resulting day of week */
+    {
+	register int day = (offs % 7);
+	/* compiler fix for negative offs - wrap (0, -1) -> (-1, 6) */
+	if (day < 0) {
+	    day = 7 + day;
+	}
+	resDayOfWeek = dayOfWeek + day;
+    }
+
+    /* adjust if we start from a weekend */
+    if (dayOfWeek > 5) {
+	int adj = 5 - dayOfWeek;
+	offs += adj;
+	resDayOfWeek += adj;
+    }
 
-#undef timezoneObj
-#undef localeObj
-#undef formatObj
+    /* adjust if we end up on a weekend */
+    if (resDayOfWeek > 5) {
+       offs += 2;
+    }
+
+    return offs;
+}
+
+
+
+/*----------------------------------------------------------------------
+ *
+ * ClockAddObjCmd -- , clock add --
+ *
+ *	Adds an offset to a given time.
+ *
+ *	Refer to the user documentation to see what it exactly does.
+ *
+ * Syntax:
+ *   clock add clockval ?count unit?... ?-option value?
+ *
+ * Parameters:
+ *   clockval -- Starting time value
+ *   count -- Amount of a unit of time to add
+ *   unit -- Unit of time to add, must be one of:
+ *	     years year months month weeks week
+ *	     days day hours hour minutes minute
+ *	     seconds second
+ *
+ * Options:
+ *   -gmt BOOLEAN
+ *	 Flag synonymous with '-timezone :GMT'
+ *   -timezone ZONE
+ *	 Name of the time zone in which calculations are to be done.
+ *   -locale NAME
+ *	 Name of the locale in which calculations are to be done.
+ *	 Used to determine the Gregorian change date.
+ *
+ * Results:
+ *	Returns a standard Tcl result with the given time adjusted 
+ *	by the given offset(s) in order.
+ *
+ * Notes:
+ *   It is possible that adding a number of months or years will adjust the
+ *   day of the month as well.	For instance, the time at one month after
+ *   31 January is either 28 or 29 February, because February has fewer
+ *   than 31 days.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+ClockAddObjCmd(
+    ClientData clientData,	/* Client data containing literal pool */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    int objc,			/* Parameter count */
+    Tcl_Obj *const objv[])	/* Parameter values */
+{
+    ClockClientData *dataPtr = clientData;
+    int ret;
+    ClockFmtScnCmdArgs opts;	/* Format, locale, timezone and base */
+    DateInfo	    yy;		/* Common structure used for parsing */
+    DateInfo	   *info = &yy;
+
+    /* add "week" to units also (because otherwise ambiguous) */
+    static const char *const units[] = {
+	"years",	"months",	    "week",	    "weeks",
+	"days",		"weekdays",
+	"hours",	"minutes",	    "seconds",
+	NULL
+    };
+    enum unitInd {
+	CLC_ADD_YEARS,	CLC_ADD_MONTHS,	    CLC_ADD_WEEK,   CLC_ADD_WEEKS,
+	CLC_ADD_DAYS,	CLC_ADD_WEEKDAYS,
+	CLC_ADD_HOURS,	CLC_ADD_MINUTES,    CLC_ADD_SECONDS
+    };
+    int unitIndex;		/* Index of an option. */
+    int i;
+    Tcl_WideInt offs;
+
+    /* even number of arguments */
+    if ((objc & 1) == 1) {
+	Tcl_WrongNumArgs(interp, 0, NULL, "clock add clockval|-now ?number units?..."
+	    "?-gmt boolean? "
+	    "?-locale LOCALE? ?-timezone ZONE?");
+	Tcl_SetErrorCode(interp, "CLOCK", "wrongNumArgs", NULL);
+	return TCL_ERROR;
+    }
+
+    ClockInitDateInfo(&yy);
+    
+    /*
+     * Extract values for the keywords.
+     */
+
+    ClockInitFmtScnArgs(clientData, interp, &opts);
+    ret = ClockParseFmtScnArgs(&opts, &yy.date, objc, objv,
+	    CLC_ADD_ARGS);
+    if (ret != TCL_OK) {
+	goto done;
+    }
+
+    /* time together as seconds of the day */
+    yySeconds = yydate.localSeconds % SECONDS_PER_DAY;	 
+    /* seconds are in localSeconds (relative base date), so reset time here */
+    yyHour = 0; yyMinutes = 0; yyMeridian = MER24;
+
+    ret = TCL_ERROR;
+
+    /*
+     * Find each offset and process date increment
+     */
+
+    for (i = 2; i < objc; i+=2) {
+	/* bypass not integers (options, allready processed above) */
+	if (TclGetWideIntFromObj(NULL, objv[i], &offs) != TCL_OK) {
+	    continue;
+	}
+	if (objv[i]->typePtr == &tclBignumType) {
+	    Tcl_SetObjResult(interp, dataPtr->literals[LIT_INTEGER_VALUE_TOO_LARGE]);
+	    goto done;
+	}
+	/* get unit */
+	if (Tcl_GetIndexFromObj(interp, objv[i+1], units, "unit", 0,
+		&unitIndex) != TCL_OK) {
+	    goto done;
+	}
+
+	/* nothing to do if zero quantity */
+	if (!offs) {
+	    continue;
+	}
+
+	/* if in-between conversion needed (already have relative date/time), 
+	 * correct date info, because the date may be changed, 
+	 * so refresh it now */
+
+	if ( yyHaveRel
+	  && ( unitIndex == CLC_ADD_WEEKDAYS 
+	    /* some months can be shorter as another */
+	    || yyRelMonth || yyRelDay
+	    /* day changed */
+	    || yySeconds + yyRelSeconds > SECONDS_PER_DAY
+	    || yySeconds + yyRelSeconds < 0
+	  )
+	) {
+	    if (ClockCalcRelTime(info, &opts) != TCL_OK) {
+		goto done;
+	    }
+	}
+
+	/* process increment by offset + unit */
+	yyHaveRel++;
+	switch (unitIndex) {
+	case CLC_ADD_YEARS:
+	    yyRelMonth += offs * 12;
+	    break;
+	case CLC_ADD_MONTHS:
+	    yyRelMonth += offs;
+	    break;
+	case CLC_ADD_WEEK:
+	case CLC_ADD_WEEKS:
+	    yyRelDay += offs * 7;
+	    break;
+	case CLC_ADD_DAYS:
+	    yyRelDay += offs;
+	    break;
+	case CLC_ADD_WEEKDAYS:
+	    /* add number of week days (skipping Saturdays and Sundays)
+	     * to a relative days value. */
+	    offs = ClockWeekdaysOffs(yy.date.dayOfWeek, offs);
+	    yyRelDay += offs;
+	    break;
+	case CLC_ADD_HOURS:
+	    yyRelSeconds += offs * 60 * 60;
+	    break;
+	case CLC_ADD_MINUTES:
+	    yyRelSeconds += offs * 60;
+	    break;
+	case CLC_ADD_SECONDS:
+	    yyRelSeconds += offs;
+	    break;
+	}
+    }
+
+    /*
+     * Do relative times (if not yet already processed interim):
+     */
+
+    if (yyHaveRel) {
+	if (ClockCalcRelTime(info, &opts) != TCL_OK) {
+	    goto done;
+	}
+    }
+
+    /* Convert date info structure into UTC seconds */
+
+    ret = ClockScanCommit(clientData, &yy, &opts);
+
+done:
+
+    Tcl_UnsetObjRef(yy.date.tzName);
+
+    if (ret != TCL_OK) {
+	return ret;
+    }
+
+    Tcl_SetObjResult(interp, Tcl_NewWideIntObj(yy.date.seconds));
+    return TCL_OK;
 }
 
 /*----------------------------------------------------------------------
@@ -2003,7 +4019,7 @@ ClockSecondsObjCmd(
     Tcl_Time now;
 
     if (objc != 1) {
-	Tcl_WrongNumArgs(interp, 1, objv, NULL);
+	Tcl_WrongNumArgs(interp, 0, NULL, "clock seconds");
 	return TCL_ERROR;
     }
     Tcl_GetTime(&now);
@@ -2014,7 +4030,7 @@ ClockSecondsObjCmd(
 /*
  *----------------------------------------------------------------------
  *
- * TzsetIfNecessary --
+ * TzsetGetEpoch --, TzsetIfNecessary --
  *
  *	Calls the tzset() library function if the contents of the TZ
  *	environment variable has changed.
@@ -2028,15 +4044,37 @@ ClockSecondsObjCmd(
  *----------------------------------------------------------------------
  */
 
-static void
-TzsetIfNecessary(void)
+static unsigned long
+TzsetGetEpoch(void)
 {
-    static char* tzWas = INT2PTR(-1);	/* Previous value of TZ, protected by
-				 * clockMutex. */
-    const char *tzIsNow;	/* Current value of TZ */
+    static char* tzWas = INT2PTR(-1);	 /* Previous value of TZ, protected by
+					  * clockMutex. */
+    static long	 tzLastRefresh = 0;	 /* Used for latency before next refresh */
+    static unsigned long tzWasEpoch = 0; /* Epoch, signals that TZ changed */
+    static unsigned long tzEnvEpoch = 0; /* Last env epoch, for faster signaling, 
+					    that TZ changed via TCL */
+    
+    const char *tzIsNow;		 /* Current value of TZ */
+    
+    /* 
+     * Prevent performance regression on some platforms by resolving of system time zone:
+     * small latency for check whether environment was changed (once per second)
+     * no latency if environment was chaned with tcl-env (compare both epoch values)
+     */
+    Tcl_Time now;
+    Tcl_GetTime(&now);
+    if (now.sec == tzLastRefresh && tzEnvEpoch == TclEnvEpoch) {
+	return tzWasEpoch;
+    }
+    tzEnvEpoch = TclEnvEpoch;
+    tzLastRefresh = now.sec;
 
+    /* check in lock */
     Tcl_MutexLock(&clockMutex);
-    tzIsNow = getenv("TZ");
+    tzIsNow = getenv("TCL_TZ");
+    if (tzIsNow == NULL) {
+	tzIsNow = getenv("TZ");
+    }
     if (tzIsNow != NULL && (tzWas == NULL || tzWas == INT2PTR(-1)
 	    || strcmp(tzIsNow, tzWas) != 0)) {
 	tzset();
@@ -2045,43 +4083,21 @@ TzsetIfNecessary(void)
 	}
 	tzWas = ckalloc(strlen(tzIsNow) + 1);
 	strcpy(tzWas, tzIsNow);
+	tzWasEpoch++;
     } else if (tzIsNow == NULL && tzWas != NULL) {
 	tzset();
 	if (tzWas != INT2PTR(-1)) ckfree(tzWas);
 	tzWas = NULL;
+	tzWasEpoch++;
     }
     Tcl_MutexUnlock(&clockMutex);
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * ClockDeleteCmdProc --
- *
- *	Remove a reference to the clock client data, and clean up memory
- *	when it's all gone.
- *
- * Results:
- *	None.
- *
- *----------------------------------------------------------------------
- */
 
-static void
-ClockDeleteCmdProc(
-    ClientData clientData)	/* Opaque pointer to the client data */
+    return tzWasEpoch;
+}
+static void
+TzsetIfNecessary(void)
 {
-    ClockClientData *data = clientData;
-    int i;
-
-    data->refCount--;
-    if (data->refCount == 0) {
-	for (i = 0; i < LIT__END; ++i) {
-	    Tcl_DecrRefCount(data->literals[i]);
-	}
-	ckfree(data->literals);
-	ckfree(data);
-    }
+    TzsetGetEpoch();
 }
 
 /*
diff --git a/generic/tclClockFmt.c b/generic/tclClockFmt.c
new file mode 100644
index 0000000..d923ede
--- /dev/null
+++ b/generic/tclClockFmt.c
@@ -0,0 +1,3138 @@
+/*
+ * tclClockFmt.c --
+ *
+ *	Contains the date format (and scan) routines. This code is back-ported
+ *	from the time and date facilities of tclSE engine, by Serg G. Brester.
+ *
+ * Copyright (c) 2015 by Sergey G. Brester aka sebres. All rights reserved.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.h"
+#include "tclStrIdxTree.h"
+#include "tclDate.h"
+
+/*
+ * Miscellaneous forward declarations and functions used within this file
+ */
+
+static void
+ClockFmtObj_DupInternalRep(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr);
+static void
+ClockFmtObj_FreeInternalRep(Tcl_Obj *objPtr);
+static int
+ClockFmtObj_SetFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
+static void
+ClockFmtObj_UpdateString(Tcl_Obj *objPtr);
+
+
+TCL_DECLARE_MUTEX(ClockFmtMutex); /* Serializes access to common format list. */
+
+static void ClockFmtScnStorageDelete(ClockFmtScnStorage *fss);
+
+static void ClockFrmScnFinalize(ClientData clientData);
+
+/*
+ * Clock scan and format facilities.
+ */
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * _str2int -- , _str2wideInt --
+ *
+ *	Fast inline-convertion of string to signed int or wide int by given
+ *	start/end.
+ *
+ *	The given string should contain numbers chars only (because already
+ *	pre-validated within parsing routines)
+ *
+ * Results:
+ *	Returns a standard Tcl result. 
+ *	TCL_OK - by successful conversion, TCL_ERROR by (wide) int overflow
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline int
+_str2int(
+    int	       *out,
+    register 
+    const char *p,
+    const char *e,
+    int sign)
+{
+    register int val = 0, prev = 0;
+    if (sign >= 0) {
+	while (p < e) {
+	    val = val * 10 + (*p++ - '0');
+	    if (val < prev) {
+		return TCL_ERROR;
+	    }
+	    prev = val;
+	}
+    } else {
+	while (p < e) {
+	    val = val * 10 - (*p++ - '0');
+	    if (val > prev) {
+		return TCL_ERROR;
+	    }
+	    prev = val;
+	}
+    }
+    *out = val;
+    return TCL_OK;
+} 
+
+static inline int
+_str2wideInt(
+    Tcl_WideInt *out,
+    register 
+    const char	*p,
+    const char	*e,
+    int sign)
+{
+    register Tcl_WideInt val = 0, prev = 0;
+    if (sign >= 0) {
+	while (p < e) {
+	    val = val * 10 + (*p++ - '0');
+	    if (val < prev) {
+		return TCL_ERROR;
+	    }
+	    prev = val;
+	}
+    } else {
+	while (p < e) {
+	    val = val * 10 - (*p++ - '0');
+	    if (val > prev) {
+		return TCL_ERROR;
+	    }
+	    prev = val;
+	}
+    }
+    *out = val;
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * _itoaw -- , _witoaw --
+ *
+ *	Fast inline-convertion of signed int or wide int to string, using
+ *	given padding with specified padchar and width (or without padding).
+ *
+ *	This is a very fast replacement for sprintf("%02d").
+ *
+ * Results:
+ *	Returns position in buffer after end of conversion result.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline char *
+_itoaw(
+    char *buf,
+    register int val,
+    char  padchar,
+    unsigned short int width)
+{
+    register char *p;
+    static int wrange[] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000};
+
+    /* positive integer */
+
+    if (val >= 0)
+    {
+	/* check resp. recalculate width */
+	while (width <= 9 && val >= wrange[width]) {
+	    width++;
+	}
+	/* number to string backwards */
+	p = buf + width;
+	*p-- = '\0';
+	do {
+	    register char c = (val % 10); val /= 10;
+	    *p-- = '0' + c;
+	} while (val > 0);
+	/* fulling with pad-char */
+	while (p >= buf) {
+	    *p-- = padchar;
+	}
+
+	return buf + width;
+    }
+    /* negative integer */
+
+    if (!width) width++;
+    /* check resp. recalculate width (regarding sign) */
+    width--;
+    while (width <= 9 && val <= -wrange[width]) {
+	width++;
+    }
+    width++;
+    /* number to string backwards */
+    p = buf + width;
+    *p-- = '\0';
+    /* differentiate platforms with -1 % 10 == 1 and -1 % 10 == -1 */
+    if (-1 % 10 == -1) {
+	do {
+	    register char c = (val % 10); val /= 10;
+	    *p-- = '0' - c;
+	} while (val < 0);
+    } else {
+	do {
+	    register char c = (val % 10); val /= 10;
+	    *p-- = '0' + c;
+	} while (val < 0);
+    }
+    /* sign by 0 padding */
+    if (padchar != '0') { *p-- = '-'; }
+    /* fulling with pad-char */
+    while (p >= buf + 1) {
+	*p-- = padchar;
+    }
+    /* sign by non 0 padding */
+    if (padchar == '0') { *p = '-'; }
+
+    return buf + width;
+}
+
+static inline char *
+_witoaw(
+    char *buf,
+    register Tcl_WideInt val,
+    char  padchar,
+    unsigned short int width)
+{
+    register char *p;
+    static int wrange[] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000};
+
+    /* positive integer */
+
+    if (val >= 0)
+    {
+	/* check resp. recalculate width */
+	if (val >= 10000000000L) {
+	    Tcl_WideInt val2;
+	    val2 = val / 10000000000L;
+	    while (width <= 9 && val2 >= wrange[width]) {
+		width++;
+	    }
+	    width += 10;
+	} else {
+	    while (width <= 9 && val >= wrange[width]) {
+		width++;
+	    }
+	}
+	/* number to string backwards */
+	p = buf + width;
+	*p-- = '\0';
+	do {
+	    register char c = (val % 10); val /= 10;
+	    *p-- = '0' + c;
+	} while (val > 0);
+	/* fulling with pad-char */
+	while (p >= buf) {
+	    *p-- = padchar;
+	}
+
+	return buf + width;
+    }
+
+    /* negative integer */
+
+    if (!width) width++;
+    /* check resp. recalculate width (regarding sign) */
+    width--;
+    if (val <= 10000000000L) {
+	Tcl_WideInt val2;
+	val2 = val / 10000000000L;
+	while (width <= 9 && val2 <= -wrange[width]) {
+	    width++;
+	}
+	width += 10;
+    } else {
+	while (width <= 9 && val <= -wrange[width]) {
+	    width++;
+	}
+    }
+    width++;
+    /* number to string backwards */
+    p = buf + width;
+    *p-- = '\0';
+    /* differentiate platforms with -1 % 10 == 1 and -1 % 10 == -1 */
+    if (-1 % 10 == -1) {
+	do {
+	    register char c = (val % 10); val /= 10;
+	    *p-- = '0' - c;
+	} while (val < 0);
+    } else {
+	do {
+	    register char c = (val % 10); val /= 10;
+	    *p-- = '0' + c;
+	} while (val < 0);
+    }
+    /* sign by 0 padding */
+    if (padchar != '0') { *p-- = '-'; }
+    /* fulling with pad-char */
+    while (p >= buf + 1) {
+	*p-- = padchar;
+    }
+    /* sign by non 0 padding */
+    if (padchar == '0') { *p = '-'; }
+
+    return buf + width;
+}
+
+/*
+ * Global GC as LIFO for released scan/format object storages.
+ * 
+ * Used to holds last released CLOCK_FMT_SCN_STORAGE_GC_SIZE formats
+ * (after last reference from Tcl-object will be removed). This is helpful
+ * to avoid continuous (re)creation and compiling by some dynamically resp.
+ * variable format objects, that could be often reused.
+ * 
+ * As long as format storage is used resp. belongs to GC, it takes place in 
+ * FmtScnHashTable also.
+ */
+
+#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
+
+static struct {
+    ClockFmtScnStorage	  *stackPtr;
+    ClockFmtScnStorage	  *stackBound;
+    unsigned int	   count;
+} ClockFmtScnStorage_GC = {NULL, NULL, 0};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockFmtScnStorageGC_In --
+ *
+ *	Adds an format storage object to GC.
+ *
+ *	If current GC is full (size larger as CLOCK_FMT_SCN_STORAGE_GC_SIZE)
+ *	this removes last unused storage at begin of GC stack (LIFO).
+ *
+ *	Assumes caller holds the ClockFmtMutex.
+ *
+ * Results:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline void
+ClockFmtScnStorageGC_In(ClockFmtScnStorage *entry) 
+{
+    /* add new entry */
+    TclSpliceIn(entry, ClockFmtScnStorage_GC.stackPtr);
+    if (ClockFmtScnStorage_GC.stackBound == NULL) {
+	ClockFmtScnStorage_GC.stackBound = entry;
+    }
+    ClockFmtScnStorage_GC.count++;
+
+    /* if GC ist full */
+    if (ClockFmtScnStorage_GC.count > CLOCK_FMT_SCN_STORAGE_GC_SIZE) {
+
+	/* GC stack is LIFO: delete first inserted entry */
+	ClockFmtScnStorage *delEnt = ClockFmtScnStorage_GC.stackBound;
+	ClockFmtScnStorage_GC.stackBound = delEnt->prevPtr;
+	TclSpliceOut(delEnt, ClockFmtScnStorage_GC.stackPtr);
+	ClockFmtScnStorage_GC.count--;
+	delEnt->prevPtr = delEnt->nextPtr = NULL;
+	/* remove it now */
+	ClockFmtScnStorageDelete(delEnt);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockFmtScnStorage_GC_Out --
+ *
+ *	Restores (for reusing) given format storage object from GC.
+ *
+ *	Assumes caller holds the ClockFmtMutex.
+ *
+ * Results:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline void
+ClockFmtScnStorage_GC_Out(ClockFmtScnStorage *entry)
+{
+    TclSpliceOut(entry, ClockFmtScnStorage_GC.stackPtr);
+    ClockFmtScnStorage_GC.count--;
+    if (ClockFmtScnStorage_GC.stackBound == entry) {
+	ClockFmtScnStorage_GC.stackBound = entry->prevPtr;
+    }
+    entry->prevPtr = entry->nextPtr = NULL;
+}
+
+#endif
+
+
+/*
+ * Global format storage hash table of type ClockFmtScnStorageHashKeyType
+ * (contains list of scan/format object storages, shared across all threads).
+ *
+ * Used for fast searching by format string. 
+ */
+static Tcl_HashTable FmtScnHashTable;
+static int	     initialized = 0;
+
+/*
+ * Wrappers between pointers to hash entry and format storage object
+ */
+static inline Tcl_HashEntry *
+HashEntry4FmtScn(ClockFmtScnStorage *fss) {
+    return (Tcl_HashEntry*)(fss + 1);
+};
+static inline ClockFmtScnStorage *
+FmtScn4HashEntry(Tcl_HashEntry *hKeyPtr) {
+    return (ClockFmtScnStorage*)(((char*)hKeyPtr) - sizeof(ClockFmtScnStorage));
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockFmtScnStorageAllocProc --
+ *
+ *	Allocate space for a hash entry containing format storage together
+ *	with the string key.
+ *
+ * Results:
+ *	The return value is a pointer to the created entry.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static Tcl_HashEntry *
+ClockFmtScnStorageAllocProc(
+    Tcl_HashTable *tablePtr,	/* Hash table. */
+    void *keyPtr)		/* Key to store in the hash table entry. */
+{
+    ClockFmtScnStorage *fss;
+
+    const char *string = (const char *) keyPtr;
+    Tcl_HashEntry *hPtr;
+    unsigned int size, 
+	allocsize = sizeof(ClockFmtScnStorage) + sizeof(Tcl_HashEntry);
+
+    allocsize += (size = strlen(string) + 1);
+    if (size > sizeof(hPtr->key)) {
+	allocsize -= sizeof(hPtr->key);
+    }
+
+    fss = ckalloc(allocsize);
+
+    /* initialize */
+    memset(fss, 0, sizeof(*fss));
+
+    hPtr = HashEntry4FmtScn(fss);
+    memcpy(&hPtr->key.string, string, size);
+    hPtr->clientData = 0; /* currently unused */
+
+    return hPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockFmtScnStorageFreeProc --
+ *
+ *	Free format storage object and space of given hash entry.
+ *
+ * Results:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void 
+ClockFmtScnStorageFreeProc(
+    Tcl_HashEntry *hPtr)
+{
+    ClockFmtScnStorage *fss = FmtScn4HashEntry(hPtr);
+
+    if (fss->scnTok != NULL) {
+	ckfree(fss->scnTok);
+	fss->scnTok = NULL;
+	fss->scnTokC = 0;
+    }
+    if (fss->fmtTok != NULL) {
+	ckfree(fss->fmtTok);
+	fss->fmtTok = NULL;
+	fss->fmtTokC = 0;
+    }
+
+    ckfree(fss);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockFmtScnStorageDelete --
+ *
+ *	Delete format storage object.
+ *
+ * Results:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void 
+ClockFmtScnStorageDelete(ClockFmtScnStorage *fss) {
+    Tcl_HashEntry   *hPtr = HashEntry4FmtScn(fss);
+    /* 
+     * This will delete a hash entry and call "ckfree" for storage self, if
+     * some additionally handling required, freeEntryProc can be used instead
+     */
+    Tcl_DeleteHashEntry(hPtr);
+}
+
+
+/* 
+ * Derivation of tclStringHashKeyType with another allocEntryProc
+ */
+
+static Tcl_HashKeyType ClockFmtScnStorageHashKeyType;
+
+
+/*
+ * Type definition of clock-format tcl object type.
+ */
+
+Tcl_ObjType ClockFmtObjType = {
+    "clock-format",	       /* name */
+    ClockFmtObj_FreeInternalRep, /* freeIntRepProc */
+    ClockFmtObj_DupInternalRep,	 /* dupIntRepProc */
+    ClockFmtObj_UpdateString,	 /* updateStringProc */
+    ClockFmtObj_SetFromAny	 /* setFromAnyProc */
+};
+
+#define ObjClockFmtScn(objPtr) \
+    (*((ClockFmtScnStorage **)&(objPtr)->internalRep.twoPtrValue.ptr1))
+
+#define ObjLocFmtKey(objPtr) \
+    (*((Tcl_Obj **)&(objPtr)->internalRep.twoPtrValue.ptr2))
+
+static void
+ClockFmtObj_DupInternalRep(srcPtr, copyPtr)
+    Tcl_Obj *srcPtr;
+    Tcl_Obj *copyPtr;
+{
+    ClockFmtScnStorage *fss = ObjClockFmtScn(srcPtr);
+
+    if (fss != NULL) {
+	Tcl_MutexLock(&ClockFmtMutex);
+	fss->objRefCount++;
+	Tcl_MutexUnlock(&ClockFmtMutex);
+    }
+
+    ObjClockFmtScn(copyPtr) = fss;
+    /* regards special case - format not localizable */
+    if (ObjLocFmtKey(srcPtr) != srcPtr) {
+	Tcl_InitObjRef(ObjLocFmtKey(copyPtr), ObjLocFmtKey(srcPtr));
+    } else {
+	ObjLocFmtKey(copyPtr) = copyPtr;
+    }
+    copyPtr->typePtr = &ClockFmtObjType;
+
+
+    /* if no format representation, dup string representation */
+    if (fss == NULL) {
+	copyPtr->bytes = ckalloc(srcPtr->length + 1);
+	memcpy(copyPtr->bytes, srcPtr->bytes, srcPtr->length + 1);
+	copyPtr->length = srcPtr->length;
+    }
+}
+
+static void
+ClockFmtObj_FreeInternalRep(objPtr)
+    Tcl_Obj *objPtr;
+{
+    ClockFmtScnStorage *fss = ObjClockFmtScn(objPtr);
+    if (fss != NULL) {
+	Tcl_MutexLock(&ClockFmtMutex);
+	/* decrement object reference count of format/scan storage */
+	if (--fss->objRefCount <= 0) {
+	    #if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
+	      /* don't remove it right now (may be reusable), just add to GC */
+	      ClockFmtScnStorageGC_In(fss);
+	    #else 
+	      /* remove storage (format representation) */
+	      ClockFmtScnStorageDelete(fss);
+	    #endif 
+	}
+	Tcl_MutexUnlock(&ClockFmtMutex);
+    }
+    ObjClockFmtScn(objPtr) = NULL;
+    if (ObjLocFmtKey(objPtr) != objPtr) {
+	Tcl_UnsetObjRef(ObjLocFmtKey(objPtr));
+    } else {
+	ObjLocFmtKey(objPtr) = NULL;
+    }
+    objPtr->typePtr = NULL;
+};
+
+static int
+ClockFmtObj_SetFromAny(interp, objPtr)
+    Tcl_Interp *interp;
+    Tcl_Obj    *objPtr;
+{
+    /* validate string representation before free old internal represenation */
+    (void)TclGetString(objPtr);
+
+    /* free old internal represenation */
+    if (objPtr->typePtr && objPtr->typePtr->freeIntRepProc)
+	objPtr->typePtr->freeIntRepProc(objPtr);
+
+    /* initial state of format object */
+    ObjClockFmtScn(objPtr) = NULL;
+    ObjLocFmtKey(objPtr) = NULL;
+    objPtr->typePtr = &ClockFmtObjType;
+
+    return TCL_OK;
+};
+
+static void
+ClockFmtObj_UpdateString(objPtr)
+    Tcl_Obj  *objPtr;
+{
+    char *name = "UNKNOWN";
+    int	  len;
+    ClockFmtScnStorage *fss = ObjClockFmtScn(objPtr);
+
+    if (fss != NULL) {
+	Tcl_HashEntry *hPtr = HashEntry4FmtScn(fss);
+	name = hPtr->key.string;
+    }
+    len = strlen(name);
+    objPtr->length = len,
+    objPtr->bytes = ckalloc((size_t)++len);
+    if (objPtr->bytes)
+	memcpy(objPtr->bytes, name, len);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockFrmObjGetLocFmtKey --
+ *
+ *	Retrieves format key object used to search localized format.
+ *
+ *	This is normally stored in second pointer of internal representation.
+ *	If format object is not localizable, it is equal the given format 
+ *	pointer (special case to fast fallback by not-localizable formats).
+ *
+ * Results:
+ *	Returns tcl object with key or format object if not localizable.
+ *
+ * Side effects:
+ * 	Converts given format object to ClockFmtObjType on demand for caching
+ *	the key inside its internal representation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_Obj*
+ClockFrmObjGetLocFmtKey(
+    Tcl_Interp *interp,
+    Tcl_Obj    *objPtr)
+{
+    Tcl_Obj *keyObj;
+
+    if (objPtr->typePtr != &ClockFmtObjType) {
+	if (ClockFmtObj_SetFromAny(interp, objPtr) != TCL_OK) {
+	    return NULL;
+	}
+    }
+   
+    keyObj = ObjLocFmtKey(objPtr);
+    if (keyObj) {
+	return keyObj;
+    }
+
+    keyObj = Tcl_ObjPrintf("FMT_%s", TclGetString(objPtr));
+    Tcl_InitObjRef(ObjLocFmtKey(objPtr), keyObj);
+
+    return keyObj;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * FindOrCreateFmtScnStorage --
+ *
+ *	Retrieves format storage for given string format.
+ *
+ *	This will find the given format in the global storage hash table
+ *	or create a format storage object on demaind and save the
+ *	reference in the first pointer of internal representation of given
+ *	object.
+ *
+ * Results:
+ *	Returns scan/format storage pointer to ClockFmtScnStorage.
+ *
+ * Side effects:
+ * 	Converts given format object to ClockFmtObjType on demand for caching
+ *	the format storage reference inside its internal representation.
+ *	Increments objRefCount of the ClockFmtScnStorage reference.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static ClockFmtScnStorage *
+FindOrCreateFmtScnStorage(
+    Tcl_Interp *interp, 
+    Tcl_Obj    *objPtr)
+{
+    const char *strFmt = TclGetString(objPtr);
+    ClockFmtScnStorage *fss = NULL;
+    int new;
+    Tcl_HashEntry *hPtr;
+
+    Tcl_MutexLock(&ClockFmtMutex);
+
+    /* if not yet initialized */
+    if (!initialized) {
+	/* initialize type */
+	memcpy(&ClockFmtScnStorageHashKeyType, &tclStringHashKeyType, sizeof(tclStringHashKeyType));
+	ClockFmtScnStorageHashKeyType.allocEntryProc = ClockFmtScnStorageAllocProc;
+	ClockFmtScnStorageHashKeyType.freeEntryProc = ClockFmtScnStorageFreeProc;
+
+	/* initialize hash table */
+	Tcl_InitCustomHashTable(&FmtScnHashTable, TCL_CUSTOM_TYPE_KEYS,
+	    &ClockFmtScnStorageHashKeyType);
+
+	initialized = 1;
+	Tcl_CreateExitHandler(ClockFrmScnFinalize, NULL);
+    }
+
+    /* get or create entry (and alocate storage) */
+    hPtr = Tcl_CreateHashEntry(&FmtScnHashTable, strFmt, &new);
+    if (hPtr != NULL) {
+	
+	fss = FmtScn4HashEntry(hPtr);
+
+	#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
+	  /* unlink if it is currently in GC */
+	  if (new == 0 && fss->objRefCount == 0) {
+	      ClockFmtScnStorage_GC_Out(fss);
+	  }
+	#endif
+
+	/* new reference, so increment in lock right now */
+	fss->objRefCount++;
+
+	ObjClockFmtScn(objPtr) = fss;
+    }
+
+    Tcl_MutexUnlock(&ClockFmtMutex);
+
+    if (fss == NULL && interp != NULL) {
+	Tcl_AppendResult(interp, "retrieve clock format failed \"",
+	    strFmt ? strFmt : "", "\"", NULL);
+	Tcl_SetErrorCode(interp, "TCL", "EINVAL", NULL);
+    }
+
+    return fss;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetClockFrmScnFromObj --
+ *
+ *	Returns a clock format/scan representation of (*objPtr), if possible.
+ *	If something goes wrong, NULL is returned, and if interp is non-NULL,
+ *	an error message is written there.
+ *
+ * Results:
+ *	Valid representation of type ClockFmtScnStorage.
+ *
+ * Side effects:
+ *	Caches the ClockFmtScnStorage reference as the internal rep of (*objPtr)
+ *	and in global hash table, shared across all threads.
+ *
+ *----------------------------------------------------------------------
+ */
+
+ClockFmtScnStorage *
+Tcl_GetClockFrmScnFromObj(
+    Tcl_Interp *interp,
+    Tcl_Obj *objPtr)
+{
+    ClockFmtScnStorage *fss;
+    
+    if (objPtr->typePtr != &ClockFmtObjType) {
+	if (ClockFmtObj_SetFromAny(interp, objPtr) != TCL_OK) {
+	    return NULL;
+	}
+    }
+
+    fss = ObjClockFmtScn(objPtr);
+
+    if (fss == NULL) {
+	fss = FindOrCreateFmtScnStorage(interp, objPtr);
+    }
+
+    return fss;
+}
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockLocalizeFormat --
+ *
+ *	Wrap the format object in options to the localized format,
+ *	corresponding given locale.
+ *
+ *	This searches localized format in locale catalog, and if not yet
+ *	exists, it executes ::tcl::clock::LocalizeFormat in given interpreter
+ *	and caches its result in the locale catalog.
+ *
+ * Results:
+ *	Localized format object.
+ *
+ * Side effects:
+ *	Caches the localized format inside locale catalog.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE Tcl_Obj *
+ClockLocalizeFormat(
+    ClockFmtScnCmdArgs *opts)
+{
+    ClockClientData *dataPtr = opts->clientData;
+    Tcl_Obj *valObj = NULL, *keyObj;
+
+    keyObj = ClockFrmObjGetLocFmtKey(opts->interp, opts->formatObj);
+
+    /* special case - format object is not localizable */
+    if (keyObj == opts->formatObj) {
+	return opts->formatObj;
+    }
+
+    /* prevents loss of key object if the format object (where key stored) 
+     * becomes changed (loses its internal representation during evals) */
+    Tcl_IncrRefCount(keyObj);
+
+    if (opts->mcDictObj == NULL) {
+	ClockMCDict(opts);
+	if (opts->mcDictObj == NULL)
+	    goto done;
+    }
+
+    /* try to find in cache within locale mc-catalog */
+    if (Tcl_DictObjGet(NULL, opts->mcDictObj, 
+	    keyObj, &valObj) != TCL_OK) {
+	goto done;
+    }
+
+    /* call LocalizeFormat locale format fmtkey */
+    if (valObj == NULL) {
+	Tcl_Obj *callargs[4];
+	callargs[0] = dataPtr->literals[LIT_LOCALIZE_FORMAT];
+	callargs[1] = opts->localeObj;
+	callargs[2] = opts->formatObj;
+	callargs[3] = keyObj;
+	if (Tcl_EvalObjv(opts->interp, 4, callargs, 0) != TCL_OK
+	) {
+	    goto done;
+	}
+
+	valObj = Tcl_GetObjResult(opts->interp);
+
+	/* cache it inside mc-dictionary (this incr. ref count of keyObj/valObj) */
+	if (Tcl_DictObjPut(opts->interp, opts->mcDictObj,
+		keyObj, valObj) != TCL_OK
+	) {
+	    valObj = NULL;
+	    goto done;
+	}
+
+	Tcl_ResetResult(opts->interp);
+
+	/* check special case - format object is not localizable */
+	if (valObj == opts->formatObj) {
+	    /* mark it as unlocalizable, by setting self as key (without refcount incr) */
+	    if (opts->formatObj->typePtr == &ClockFmtObjType) {
+		Tcl_UnsetObjRef(ObjLocFmtKey(opts->formatObj));
+		ObjLocFmtKey(opts->formatObj) = opts->formatObj;
+	    }
+	}
+    }
+
+done:
+
+    Tcl_UnsetObjRef(keyObj);
+    return (opts->formatObj = valObj);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * FindTokenBegin --
+ *
+ *	Find begin of given scan token in string, corresponding token type.
+ *
+ * Results:
+ *	Position of token inside string if found. Otherwise - end of string.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static const char *
+FindTokenBegin(
+    register const char *p,
+    register const char *end,
+    ClockScanToken *tok)
+{
+    char c;
+    if (p < end) {
+	/* next token a known token type */
+	switch (tok->map->type) {
+	case CTOKT_DIGIT:
+	    /* should match at least one digit */
+	    while (!isdigit(UCHAR(*p)) && (p = TclUtfNext(p)) < end) {};
+	    return p;
+	break;
+	case CTOKT_WORD:
+	    c = *(tok->tokWord.start);
+	    /* should match at least to the first char of this word */
+	    while (*p != c && (p = TclUtfNext(p)) < end) {};
+	    return p;
+	break;
+	case CTOKT_SPACE:
+	    while (!isspace(UCHAR(*p)) && (p = TclUtfNext(p)) < end) {};
+	    return p;
+	break;
+	case CTOKT_CHAR:
+	    c = *((char *)tok->map->data);
+	    while (*p != c && (p = TclUtfNext(p)) < end) {};
+	    return p;
+	break;
+	}
+    }
+    return p;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DetermineGreedySearchLen --
+ *
+ *	Determine min/max lengths as exact as possible (speed, greedy match).
+ *
+ * Results:
+ *	None. Lengths are stored in *minLenPtr, *maxLenPtr.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+DetermineGreedySearchLen(ClockFmtScnCmdArgs *opts,
+    DateInfo *info, ClockScanToken *tok, 
+    int *minLenPtr, int *maxLenPtr)
+{
+    register int minLen = tok->map->minSize;
+    register int maxLen;
+    register const char *p = yyInput + minLen,
+			*end = info->dateEnd;
+
+    /* if still tokens available, try to correct minimum length */
+    if ((tok+1)->map) {
+	end -= tok->endDistance + yySpaceCount;
+	/* find position of next known token */
+	p = FindTokenBegin(p, end, tok+1);
+	if (p < end) {
+	    minLen = p - yyInput;
+	}
+    }
+
+    /* max length to the end regarding distance to end (min-width of following tokens) */
+    maxLen = end - yyInput;
+    /* several amendments */
+    if (maxLen > tok->map->maxSize) {
+	maxLen = tok->map->maxSize;
+    };
+    if (minLen < tok->map->minSize) {
+	minLen = tok->map->minSize;
+    } 
+    if (minLen > maxLen) {
+	maxLen = minLen;
+    }
+    if (maxLen > info->dateEnd - yyInput) {
+	maxLen = info->dateEnd - yyInput;
+    }
+
+    /* check digits rigth now */
+    if (tok->map->type == CTOKT_DIGIT) {
+	p = yyInput;
+	end = p + maxLen;
+	if (end > info->dateEnd) { end = info->dateEnd; };
+	while (isdigit(UCHAR(*p)) && p < end) { p++; };
+	maxLen = p - yyInput;
+    }
+
+    /* try to get max length more precise for greedy match,
+     * check the next ahead token available there */
+    if (minLen < maxLen && tok->lookAhTok) {
+	ClockScanToken *laTok = tok + tok->lookAhTok + 1;
+	p = yyInput + maxLen;
+	/* regards all possible spaces here (because they are optional) */
+	end = p + tok->lookAhMax + yySpaceCount + 1;
+	if (end > info->dateEnd) {
+	    end = info->dateEnd;
+	}
+	p += tok->lookAhMin;
+	if (laTok->map && p < end) {
+	    const char *f;
+	    /* try to find laTok between [lookAhMin, lookAhMax] */
+	    while (minLen < maxLen) {
+		f = FindTokenBegin(p, end, laTok);
+		/* if found (not below lookAhMax) */
+		if (f < end) {
+		    break;
+		}
+		/* try again with fewer length */
+		maxLen--;
+		p--;
+		end--;
+	    }
+	} else if (p > end) {
+	    maxLen -= (p - end);
+	    if (maxLen < minLen) {
+		maxLen = minLen;
+	    }
+	}
+    }
+
+    *minLenPtr = minLen;
+    *maxLenPtr = maxLen;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ObjListSearch --
+ *
+ *	Find largest part of the input string from start regarding min and 
+ *	max lengths in the given list (utf-8, case sensitive).
+ *
+ * Results:
+ *	TCL_OK - match found, TCL_RETURN - not matched, TCL_ERROR in error case.
+ *
+ * Side effects:
+ *	Input points to end of the found token in string.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline int 
+ObjListSearch(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, int *val, 
+    Tcl_Obj **lstv, int lstc,
+    int minLen, int maxLen)
+{
+    int	       i, l, lf = -1;
+    const char *s, *f, *sf;
+    /* search in list */
+    for (i = 0; i < lstc; i++) {
+	s = TclGetString(lstv[i]);
+	l = lstv[i]->length;
+
+	if ( l >= minLen
+	  && (f = TclUtfFindEqualNC(yyInput, yyInput + maxLen, s, s + l, &sf)) > yyInput
+	) {
+	    l = f - yyInput;
+	    if (l < minLen) {
+		continue;
+	    }
+	    /* found, try to find longest value (greedy search) */
+	    if (l < maxLen && minLen != maxLen) {
+		lf = i;
+		minLen = l + 1;
+		continue;
+	    }
+	    /* max possible - end of search */
+	    *val = i;
+	    yyInput += l;
+	    break;
+	}
+    }
+
+    /* if found */
+    if (i < lstc) {
+	return TCL_OK;
+    }
+    if (lf >= 0) {
+	*val = lf;
+	yyInput += minLen - 1;
+	return TCL_OK;
+    }
+    return TCL_RETURN;
+}
+#if 0
+/* currently unused */
+
+static int 
+LocaleListSearch(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, int mcKey, int *val, 
+    int minLen, int maxLen)
+{
+    Tcl_Obj **lstv;
+    int	      lstc;
+    Tcl_Obj *valObj;
+
+    /* get msgcat value */
+    valObj = ClockMCGet(opts, mcKey);
+    if (valObj == NULL) {
+	return TCL_ERROR;
+    }
+
+    /* is a list */
+    if (TclListObjGetElements(opts->interp, valObj, &lstc, &lstv) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    /* search in list */
+    return ObjListSearch(opts, info, val, lstv, lstc,
+	minLen, maxLen);
+}
+#endif
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockMCGetListIdxTree --
+ *
+ *	Retrieves localized string indexed tree in the locale catalog for
+ *	given literal index mcKey (and builds it on demand).
+ *
+ *	Searches localized index in locale catalog, and if not yet exists,
+ *	creates string indexed tree and stores it in the locale catalog.
+ *
+ * Results:
+ *	Localized string index tree.
+ *
+ * Side effects:
+ *	Caches the localized string index tree inside locale catalog.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static TclStrIdxTree *
+ClockMCGetListIdxTree(
+    ClockFmtScnCmdArgs *opts, 
+    int	 mcKey)
+{
+    TclStrIdxTree * idxTree;
+    Tcl_Obj *objPtr = ClockMCGetIdx(opts, mcKey);
+    if ( objPtr != NULL
+      && (idxTree = TclStrIdxTreeGetFromObj(objPtr)) != NULL
+    ) {
+	return idxTree;
+
+    } else {
+	/* build new index */
+
+	Tcl_Obj **lstv;
+	int	  lstc;
+	Tcl_Obj *valObj;
+
+	objPtr = TclStrIdxTreeNewObj();
+	if ((idxTree = TclStrIdxTreeGetFromObj(objPtr)) == NULL) {
+	    goto done; /* unexpected, but ...*/
+	}
+
+	valObj = ClockMCGet(opts, mcKey);
+	if (valObj == NULL) {
+	    goto done;
+	}
+
+	if (TclListObjGetElements(opts->interp, valObj, 
+		&lstc, &lstv) != TCL_OK) {
+	    goto done;
+	};
+
+	if (TclStrIdxTreeBuildFromList(idxTree, lstc, lstv, NULL) != TCL_OK) {
+	    goto done;
+	}
+
+	ClockMCSetIdx(opts, mcKey, objPtr);
+	objPtr = NULL;
+    };
+
+done:
+    if (objPtr) {
+	Tcl_DecrRefCount(objPtr);
+	idxTree = NULL;
+    }
+
+    return idxTree;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockMCGetMultiListIdxTree --
+ *
+ *	Retrieves localized string indexed tree in the locale catalog for
+ *	multiple lists by literal indices mcKeys (and builds it on demand).
+ *
+ *	Searches localized index in locale catalog for mcKey, and if not 
+ *	yet exists, creates string indexed tree and stores it in the 
+ *	locale catalog.
+ *
+ * Results:
+ *	Localized string index tree.
+ *
+ * Side effects:
+ *	Caches the localized string index tree inside locale catalog.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static TclStrIdxTree *
+ClockMCGetMultiListIdxTree(
+    ClockFmtScnCmdArgs *opts, 
+    int	 mcKey, 
+    int *mcKeys)
+{
+    TclStrIdxTree * idxTree;
+    Tcl_Obj *objPtr = ClockMCGetIdx(opts, mcKey);
+    if ( objPtr != NULL
+      && (idxTree = TclStrIdxTreeGetFromObj(objPtr)) != NULL
+    ) {
+	return idxTree;
+
+    } else {
+	/* build new index */
+
+	Tcl_Obj **lstv;
+	int	  lstc;
+	Tcl_Obj *valObj;
+
+	objPtr = TclStrIdxTreeNewObj();
+	if ((idxTree = TclStrIdxTreeGetFromObj(objPtr)) == NULL) {
+	    goto done; /* unexpected, but ...*/
+	}
+
+	while (*mcKeys) {
+
+	    valObj = ClockMCGet(opts, *mcKeys);
+	    if (valObj == NULL) {
+		goto done;
+	    }
+
+	    if (TclListObjGetElements(opts->interp, valObj, 
+		    &lstc, &lstv) != TCL_OK) {
+		goto done;
+	    };
+
+	    if (TclStrIdxTreeBuildFromList(idxTree, lstc, lstv, NULL) != TCL_OK) {
+		goto done;
+	    }
+	    mcKeys++;
+	}
+
+	ClockMCSetIdx(opts, mcKey, objPtr);
+	objPtr = NULL;
+    };
+
+done:
+    if (objPtr) {
+	Tcl_DecrRefCount(objPtr);
+	idxTree = NULL;
+    }
+
+    return idxTree;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClockStrIdxTreeSearch --
+ *
+ *	Find largest part of the input string from start regarding lengths
+ *	in the given localized string indexed tree (utf-8, case sensitive).
+ *
+ * Results:
+ *	TCL_OK - match found and the index stored in *val,
+ *	TCL_RETURN - not matched or ambigous, 
+ * 	TCL_ERROR - in error case.
+ *
+ * Side effects:
+ *	Input points to end of the found token in string.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline int
+ClockStrIdxTreeSearch(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, TclStrIdxTree *idxTree, int *val, 
+    int minLen, int maxLen)
+{
+    const char *f;
+    TclStrIdx  *foundItem;
+    f = TclStrIdxTreeSearch(NULL, &foundItem, idxTree, 
+	    yyInput, yyInput + maxLen);
+ 
+    if (f <= yyInput || (f - yyInput) < minLen) {
+	/* not found */
+	return TCL_RETURN;
+    }
+    if (!foundItem->value) {
+	/* ambigous */
+	return TCL_RETURN;
+    }
+
+    *val = PTR2INT(foundItem->value);
+
+    /* shift input pointer */
+    yyInput = f;
+
+    return TCL_OK;
+}
+#if 0
+/* currently unused */
+
+static int 
+StaticListSearch(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, const char **lst, int *val)
+{
+    int len;
+    const char **s = lst;
+    while (*s != NULL) {
+	len = strlen(*s);
+	if ( len <= info->dateEnd - yyInput 
+	  && strncasecmp(yyInput, *s, len) == 0
+	) {
+	    *val = (s - lst);
+	    yyInput += len;
+	    break;
+	}
+	s++;
+    }
+    if (*s != NULL) {
+	return TCL_OK;
+    }
+    return TCL_RETURN;
+}
+#endif
+
+static inline const char *
+FindWordEnd(
+    ClockScanToken *tok, 
+    register const char * p, const char * end)
+{
+    register const char *x = tok->tokWord.start;
+    const char *pfnd = p;
+    if (x == tok->tokWord.end - 1) { /* fast phase-out for single char word */
+	if (*p == *x) {
+	    return ++p;
+	}
+    }
+    /* multi-char word */
+    x = TclUtfFindEqualNC(x, tok->tokWord.end, p, end, &pfnd);
+    if (x < tok->tokWord.end) {
+	/* no match -> error */
+	return NULL;
+    }
+    return pfnd;
+}
+
+static int 
+ClockScnToken_Month_Proc(ClockFmtScnCmdArgs *opts,
+    DateInfo *info, ClockScanToken *tok)
+{
+#if 0
+/* currently unused, test purposes only */
+    static const char * months[] = {
+	/* full */
+	"January", "February", "March",
+	"April",   "May",      "June",
+	"July",	   "August",   "September",
+	"October", "November", "December",
+	/* abbr */
+	"Jan", "Feb", "Mar", "Apr", "May", "Jun", 
+	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
+	NULL
+    };
+    int val;
+    if (StaticListSearch(opts, info, months, &val) != TCL_OK) {
+	return TCL_RETURN;
+    }
+    yyMonth = (val % 12) + 1;
+    return TCL_OK;
+#endif
+
+    static int monthsKeys[] = {MCLIT_MONTHS_FULL, MCLIT_MONTHS_ABBREV, 0};
+
+    int ret, val;
+    int minLen, maxLen;
+    TclStrIdxTree *idxTree;
+
+    DetermineGreedySearchLen(opts, info, tok, &minLen, &maxLen);
+
+    /* get or create tree in msgcat dict */
+
+    idxTree = ClockMCGetMultiListIdxTree(opts, MCLIT_MONTHS_COMB, monthsKeys);
+    if (idxTree == NULL) {
+	return TCL_ERROR;
+    }
+
+    ret = ClockStrIdxTreeSearch(opts, info, idxTree, &val, minLen, maxLen);
+    if (ret != TCL_OK) {
+	return ret;
+    }
+
+    yyMonth = val;
+    return TCL_OK;
+
+}
+
+static int 
+ClockScnToken_DayOfWeek_Proc(ClockFmtScnCmdArgs *opts,
+    DateInfo *info, ClockScanToken *tok)
+{
+    static int dowKeys[] = {MCLIT_DAYS_OF_WEEK_ABBREV, MCLIT_DAYS_OF_WEEK_FULL, 0};
+
+    int ret, val;
+    int minLen, maxLen;
+    char curTok = *tok->tokWord.start;
+    TclStrIdxTree *idxTree;
+
+    DetermineGreedySearchLen(opts, info, tok, &minLen, &maxLen);
+
+    /* %u %w %Ou %Ow */
+    if ( curTok != 'a' && curTok != 'A'
+      && ((minLen <= 1 && maxLen >= 1) || PTR2INT(tok->map->data))
+    ) {
+	
+	val = -1;
+
+	if (PTR2INT(tok->map->data) == 0) {
+	    if (*yyInput >= '0' && *yyInput <= '9') {
+		val = *yyInput - '0';
+	    }
+	} else {
+	    idxTree = ClockMCGetListIdxTree(opts, PTR2INT(tok->map->data) /* mcKey */);
+	    if (idxTree == NULL) {
+		return TCL_ERROR;
+	    }
+
+	    ret = ClockStrIdxTreeSearch(opts, info, idxTree, &val, minLen, maxLen);
+	    if (ret != TCL_OK) {
+		return ret;
+	    }
+	    --val;
+	}
+
+	if (val != -1) {
+	    if (val == 0) {
+		val = 7;
+	    }
+	    if (val > 7) {
+		Tcl_SetResult(opts->interp, "day of week is greater than 7",
+		    TCL_STATIC);
+		Tcl_SetErrorCode(opts->interp, "CLOCK", "badDayOfWeek", NULL);
+		return TCL_ERROR;
+	    }
+	    info->date.dayOfWeek = val;
+	    yyInput++;
+	    return TCL_OK;
+	}
+
+
+	return TCL_RETURN;
+    }
+
+    /* %a %A */
+    idxTree = ClockMCGetMultiListIdxTree(opts, MCLIT_DAYS_OF_WEEK_COMB, dowKeys);
+    if (idxTree == NULL) {
+	return TCL_ERROR;
+    }
+
+    ret = ClockStrIdxTreeSearch(opts, info, idxTree, &val, minLen, maxLen);
+    if (ret != TCL_OK) {
+	return ret;
+    }
+    --val;
+
+    if (val == 0) {
+	val = 7;
+    }
+    info->date.dayOfWeek = val;
+    return TCL_OK;
+
+}
+
+static int 
+ClockScnToken_amPmInd_Proc(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, ClockScanToken *tok)
+{
+    int ret, val;
+    int minLen, maxLen;
+    Tcl_Obj *amPmObj[2];
+
+    DetermineGreedySearchLen(opts, info, tok, &minLen, &maxLen);
+
+    amPmObj[0] = ClockMCGet(opts, MCLIT_AM);
+    amPmObj[1] = ClockMCGet(opts, MCLIT_PM);
+
+    if (amPmObj[0] == NULL || amPmObj[1] == NULL) {
+	return TCL_ERROR;
+    }
+
+    ret = ObjListSearch(opts, info, &val, amPmObj, 2,
+	minLen, maxLen);
+    if (ret != TCL_OK) {
+	return ret; 
+    }
+
+    if (val == 0) {
+	yyMeridian = MERam;
+    } else {
+	yyMeridian = MERpm;
+    }
+
+    return TCL_OK;
+}
+
+static int 
+ClockScnToken_LocaleERA_Proc(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, ClockScanToken *tok)
+{
+    ClockClientData *dataPtr = opts->clientData;
+
+    int ret, val;
+    int minLen, maxLen;
+    Tcl_Obj *eraObj[6];
+
+    DetermineGreedySearchLen(opts, info, tok, &minLen, &maxLen);
+
+    eraObj[0] = ClockMCGet(opts, MCLIT_BCE);
+    eraObj[1] = ClockMCGet(opts, MCLIT_CE);
+    eraObj[2] = dataPtr->mcLiterals[MCLIT_BCE2];
+    eraObj[3] = dataPtr->mcLiterals[MCLIT_CE2];
+    eraObj[4] = dataPtr->mcLiterals[MCLIT_BCE3];
+    eraObj[5] = dataPtr->mcLiterals[MCLIT_CE3];
+
+    if (eraObj[0] == NULL || eraObj[1] == NULL) {
+	return TCL_ERROR;
+    }
+
+    ret = ObjListSearch(opts, info, &val, eraObj, 6,
+	minLen, maxLen);
+    if (ret != TCL_OK) {
+	return ret; 
+    }
+
+    if (val & 1) {
+	yydate.era = CE;
+    } else {
+	yydate.era = BCE;
+    }
+
+    return TCL_OK;
+}
+
+static int 
+ClockScnToken_LocaleListMatcher_Proc(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, ClockScanToken *tok)
+{
+    int ret, val;
+    int minLen, maxLen;
+    TclStrIdxTree *idxTree;
+
+    DetermineGreedySearchLen(opts, info, tok, &minLen, &maxLen);
+
+    /* get or create tree in msgcat dict */
+
+    idxTree = ClockMCGetListIdxTree(opts, PTR2INT(tok->map->data) /* mcKey */);
+    if (idxTree == NULL) {
+	return TCL_ERROR;
+    }
+
+    ret = ClockStrIdxTreeSearch(opts, info, idxTree, &val, minLen, maxLen);
+    if (ret != TCL_OK) {
+	return ret;
+    }
+
+    if (tok->map->offs > 0) {
+	*(int *)(((char *)info) + tok->map->offs) = --val;
+    }
+
+    return TCL_OK;
+}
+
+static int 
+ClockScnToken_TimeZone_Proc(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, ClockScanToken *tok)
+{
+    int minLen, maxLen;
+    int len = 0;
+    register const char *p = yyInput;
+    Tcl_Obj *tzObjStor = NULL;
+
+    DetermineGreedySearchLen(opts, info, tok, &minLen, &maxLen);
+
+    /* numeric timezone */
+    if (*p == '+' || *p == '-') {
+	/* max chars in numeric zone = "+00:00:00" */
+    #define MAX_ZONE_LEN 9
+	char buf[MAX_ZONE_LEN + 1]; 
+	char *bp = buf;
+	*bp++ = *p++; len++;
+	if (maxLen > MAX_ZONE_LEN)
+	    maxLen = MAX_ZONE_LEN;
+	/* cumulate zone into buf without ':' */
+	while (len + 1 < maxLen) {
+	    if (!isdigit(UCHAR(*p))) break;
+	    *bp++ = *p++; len++;
+	    if (!isdigit(UCHAR(*p))) break;
+	    *bp++ = *p++; len++;
+	    if (len + 2 < maxLen) {
+		if (*p == ':') {
+		    p++; len++;
+		}
+	    }
+	}
+	*bp = '\0';
+
+	if (len < minLen) {
+	    return TCL_RETURN;
+	}
+    #undef MAX_ZONE_LEN
+	
+	/* timezone */
+	tzObjStor = Tcl_NewStringObj(buf, bp-buf);
+    } else {
+	/* legacy (alnum) timezone like CEST, etc. */
+	if (maxLen > 4)
+	    maxLen = 4;
+	while (len < maxLen) {
+	    if ( (*p & 0x80) 
+	      || (!isalpha(UCHAR(*p)) && !isdigit(UCHAR(*p)))
+	    ) {	      /* INTL: ISO only. */
+		break;
+	    }
+	    p++; len++;
+	}
+
+	if (len < minLen) {
+	    return TCL_RETURN;
+	}
+
+	/* timezone */
+	tzObjStor = Tcl_NewStringObj(yyInput, p-yyInput);
+
+	/* convert using dict */
+    }
+
+    /* try to apply new time zone */
+    Tcl_IncrRefCount(tzObjStor);
+
+    opts->timezoneObj = ClockSetupTimeZone(opts->clientData, opts->interp, 
+	tzObjStor);
+
+    Tcl_DecrRefCount(tzObjStor);
+    if (opts->timezoneObj == NULL) {
+	return TCL_ERROR;
+    }
+
+    yyInput += len;
+
+    return TCL_OK;
+}
+
+static int 
+ClockScnToken_StarDate_Proc(ClockFmtScnCmdArgs *opts, 
+    DateInfo *info, ClockScanToken *tok)
+{
+    int minLen, maxLen;
+    register const char *p = yyInput, *end; const char *s;
+    int year, fractYear, fractDayDiv, fractDay;
+    static const char *stardatePref = "stardate ";
+
+    DetermineGreedySearchLen(opts, info, tok, &minLen, &maxLen);
+
+    end = yyInput + maxLen;
+
+    /* stardate string */
+    p = TclUtfFindEqualNCInLwr(p, end, stardatePref, stardatePref + 9, &s);
+    if (p >= end || p - yyInput < 9) {
+	return TCL_RETURN;
+    }
+    /* bypass spaces */
+    while (p < end && isspace(UCHAR(*p))) {
+	p++;
+    }
+    if (p >= end) {
+	return TCL_RETURN;
+    }
+    /* currently positive stardate only */
+    if (*p == '+') { p++; };
+    s = p;
+    while (p < end && isdigit(UCHAR(*p))) {
+	p++;
+    }
+    if (p >= end || p - s < 4) {
+	return TCL_RETURN;
+    }
+    if ( _str2int(&year, s, p-3, 1) != TCL_OK
+      || _str2int(&fractYear, p-3, p, 1) != TCL_OK) {
+	return TCL_RETURN;
+    };
+    if (*p++ != '.') {
+	return TCL_RETURN;
+    }
+    s = p;
+    fractDayDiv = 1;
+    while (p < end && isdigit(UCHAR(*p))) {
+	fractDayDiv *= 10;
+	p++;
+    }
+    if ( _str2int(&fractDay, s, p, 1) != TCL_OK) {
+	return TCL_RETURN;
+    };
+    yyInput = p;
+
+    /* Build a date from year and fraction. */
+
+    yydate.year = year + RODDENBERRY;
+    yydate.era = CE;
+    yydate.gregorian = 1;
+
+    if (IsGregorianLeapYear(&yydate)) {
+	fractYear *= 366;
+    } else {
+	fractYear *= 365;
+    }
+    yydate.dayOfYear = fractYear / 1000 + 1;
+    if (fractYear % 1000 >= 500) {
+	yydate.dayOfYear++;
+    }
+
+    GetJulianDayFromEraYearDay(&yydate, GREGORIAN_CHANGE_DATE);
+
+    yydate.localSeconds =
+	-210866803200L
+	+ ( SECONDS_PER_DAY * (Tcl_WideInt)yydate.julianDay )
+	+ ( SECONDS_PER_DAY * fractDay / fractDayDiv );
+
+    return TCL_OK;
+}
+
+static const char *ScnSTokenMapIndex = 
+    "dmbyYHMSpJjCgGVazUsntQ";
+static ClockScanTokenMap ScnSTokenMap[] = {
+    /* %d %e */
+    {CTOKT_DIGIT, CLF_DAYOFMONTH, 0, 1, 2, TclOffset(DateInfo, date.dayOfMonth),
+	NULL},
+    /* %m %N */
+    {CTOKT_DIGIT, CLF_MONTH, 0, 1, 2, TclOffset(DateInfo, date.month),
+	NULL},
+    /* %b %B %h */
+    {CTOKT_PARSER, CLF_MONTH, 0, 0, 0xffff, 0,
+	    ClockScnToken_Month_Proc},
+    /* %y */
+    {CTOKT_DIGIT, CLF_YEAR, 0, 1, 2, TclOffset(DateInfo, date.year),
+	NULL},
+    /* %Y */
+    {CTOKT_DIGIT, CLF_YEAR | CLF_CENTURY, 0, 4, 4, TclOffset(DateInfo, date.year),
+	NULL},
+    /* %H %k %I %l */
+    {CTOKT_DIGIT, CLF_TIME, 0, 1, 2, TclOffset(DateInfo, date.hour),
+	NULL},
+    /* %M */
+    {CTOKT_DIGIT, CLF_TIME, 0, 1, 2, TclOffset(DateInfo, date.minutes),
+	NULL},
+    /* %S */
+    {CTOKT_DIGIT, CLF_TIME, 0, 1, 2, TclOffset(DateInfo, date.secondOfDay),
+	NULL},
+    /* %p %P */
+    {CTOKT_PARSER, CLF_ISO8601, 0, 0, 0xffff, 0,
+	ClockScnToken_amPmInd_Proc, NULL},
+    /* %J */
+    {CTOKT_DIGIT, CLF_JULIANDAY, 0, 1, 0xffff, TclOffset(DateInfo, date.julianDay),
+	NULL},
+    /* %j */
+    {CTOKT_DIGIT, CLF_DAYOFYEAR, 0, 1, 3, TclOffset(DateInfo, date.dayOfYear),
+	NULL},
+    /* %C */
+    {CTOKT_DIGIT, CLF_CENTURY|CLF_ISO8601CENTURY, 0, 1, 2, TclOffset(DateInfo, dateCentury),
+	NULL},
+    /* %g */
+    {CTOKT_DIGIT, CLF_ISO8601YEAR | CLF_ISO8601, 0, 2, 2, TclOffset(DateInfo, date.iso8601Year),
+	NULL},
+    /* %G */
+    {CTOKT_DIGIT, CLF_ISO8601YEAR | CLF_ISO8601 | CLF_ISO8601CENTURY, 0, 4, 4, TclOffset(DateInfo, date.iso8601Year),
+	NULL},
+    /* %V */
+    {CTOKT_DIGIT, CLF_ISO8601, 0, 1, 2, TclOffset(DateInfo, date.iso8601Week),
+	NULL},
+    /* %a %A %u %w */
+    {CTOKT_PARSER, CLF_ISO8601, 0, 0, 0xffff, 0,
+	ClockScnToken_DayOfWeek_Proc, NULL},
+    /* %z %Z */
+    {CTOKT_PARSER, CLF_OPTIONAL, 0, 0, 0xffff, 0,
+	ClockScnToken_TimeZone_Proc, NULL},
+    /* %U %W */
+    {CTOKT_DIGIT, CLF_OPTIONAL, 0, 1, 2, 0, /* currently no capture, parse only token */
+	NULL},
+    /* %s */
+    {CTOKT_DIGIT, CLF_POSIXSEC | CLF_SIGNED, 0, 1, 0xffff, TclOffset(DateInfo, date.seconds),
+	NULL},
+    /* %n */
+    {CTOKT_CHAR, 0, 0, 1, 1, 0, NULL, "\n"},
+    /* %t */
+    {CTOKT_CHAR, 0, 0, 1, 1, 0, NULL, "\t"},
+    /* %Q */
+    {CTOKT_PARSER, CLF_LOCALSEC, 0, 16, 30, 0,
+	ClockScnToken_StarDate_Proc, NULL},
+};
+static const char *ScnSTokenMapAliasIndex[2] = {
+    "eNBhkIlPAuwZW",
+    "dmbbHHHpaaazU"
+};
+
+static const char *ScnETokenMapIndex = 
+    "Eys";
+static ClockScanTokenMap ScnETokenMap[] = {
+    /* %EE */
+    {CTOKT_PARSER, 0, 0, 0, 0xffff, TclOffset(DateInfo, date.year),
+	ClockScnToken_LocaleERA_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Ey */
+    {CTOKT_PARSER, 0, 0, 0, 0xffff, 0, /* currently no capture, parse only token */
+	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Es */
+    {CTOKT_DIGIT, CLF_LOCALSEC | CLF_SIGNED, 0, 1, 0xffff, TclOffset(DateInfo, date.localSeconds),
+	NULL},
+};
+static const char *ScnETokenMapAliasIndex[2] = {
+    "",
+    ""
+};
+
+static const char *ScnOTokenMapIndex = 
+    "dmyHMSu";
+static ClockScanTokenMap ScnOTokenMap[] = {
+    /* %Od %Oe */
+    {CTOKT_PARSER, CLF_DAYOFMONTH, 0, 0, 0xffff, TclOffset(DateInfo, date.dayOfMonth),
+	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Om */
+    {CTOKT_PARSER, CLF_MONTH, 0, 0, 0xffff, TclOffset(DateInfo, date.month),
+	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Oy */
+    {CTOKT_PARSER, CLF_YEAR, 0, 0, 0xffff, TclOffset(DateInfo, date.year),
+	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %OH %Ok %OI %Ol */
+    {CTOKT_PARSER, CLF_TIME, 0, 0, 0xffff, TclOffset(DateInfo, date.hour),
+	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %OM */
+    {CTOKT_PARSER, CLF_TIME, 0, 0, 0xffff, TclOffset(DateInfo, date.minutes),
+	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %OS */
+    {CTOKT_PARSER, CLF_TIME, 0, 0, 0xffff, TclOffset(DateInfo, date.secondOfDay),
+	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Ou Ow */
+    {CTOKT_PARSER, CLF_ISO8601, 0, 0, 0xffff, 0,
+	ClockScnToken_DayOfWeek_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+};
+static const char *ScnOTokenMapAliasIndex[2] = {
+    "ekIlw",
+    "dHHHu"
+};
+
+static const char *ScnSpecTokenMapIndex = 
+    " ";
+static ClockScanTokenMap ScnSpecTokenMap[] = {
+    {CTOKT_SPACE,  0, 0, 1, 1, 0,
+	NULL},
+};
+
+static ClockScanTokenMap ScnWordTokenMap = {
+    CTOKT_WORD,	   0, 0, 1, 1, 0, 
+	NULL
+};
+
+
+static inline unsigned int
+EstimateTokenCount(
+    register const char *fmt,
+    register const char *end)
+{
+    register const char *p = fmt;
+    unsigned int tokcnt;
+    /* estimate token count by % char and format length */
+    tokcnt = 0;
+    while (p <= end) {
+	if (*p++ == '%') {
+	    tokcnt++;
+	    p++;
+	}
+    }
+    p = fmt + tokcnt * 2;
+    if (p < end) {
+	if ((unsigned int)(end - p) < tokcnt) {
+	    tokcnt += (end - p);
+	} else {
+	    tokcnt += tokcnt;
+	}
+    }
+    return ++tokcnt;
+}
+
+#define AllocTokenInChain(tok, chain, tokCnt) \
+    if (++(tok) >= (chain) + (tokCnt)) { \
+	chain = ckrealloc((char *)(chain), \
+	    (tokCnt + CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE) * sizeof(*(tok))); \
+	if ((chain) == NULL) { goto done; }; \
+	(tok) = (chain) + (tokCnt); \
+	(tokCnt) += CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE; \
+    } \
+    memset(tok, 0, sizeof(*(tok)));
+
+/*
+ *----------------------------------------------------------------------
+ */
+ClockFmtScnStorage *
+ClockGetOrParseScanFormat(
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    Tcl_Obj    *formatObj)	/* Format container */
+{
+    ClockFmtScnStorage *fss;
+    ClockScanToken     *tok;
+
+    fss = Tcl_GetClockFrmScnFromObj(interp, formatObj);
+    if (fss == NULL) {
+	return NULL;
+    }
+
+    /* if first time scanning - tokenize format */
+    if (fss->scnTok == NULL) {
+	unsigned int tokCnt;
+	register const char *p, *e, *cp;
+
+	e = p = HashEntry4FmtScn(fss)->key.string;
+	e += strlen(p);
+
+	/* estimate token count by % char and format length */
+	fss->scnTokC = EstimateTokenCount(p, e);
+	
+	fss->scnSpaceCount = 0;
+
+	Tcl_MutexLock(&ClockFmtMutex);
+
+	fss->scnTok = tok = ckalloc(sizeof(*tok) * fss->scnTokC);
+	memset(tok, 0, sizeof(*(tok)));
+	tokCnt = 1;
+	while (p < e) {
+	    switch (*p) {
+	    case '%':
+	    if (1) {
+		ClockScanTokenMap * scnMap = ScnSTokenMap;
+		const char *mapIndex =	ScnSTokenMapIndex,
+			  **aliasIndex = ScnSTokenMapAliasIndex;
+		if (p+1 >= e) {
+		    goto word_tok;
+		}
+		p++;
+		/* try to find modifier: */
+		switch (*p) {
+		case '%':
+		    /* begin new word token - don't join with previous word token, 
+		     * because current mapping should be "...%%..." -> "...%..." */
+		    tok->map = &ScnWordTokenMap;
+		    tok->tokWord.start = p;
+		    tok->tokWord.end = p+1;
+		    AllocTokenInChain(tok, fss->scnTok, fss->scnTokC); tokCnt++;
+		    p++;
+		    continue;
+		break;
+		case 'E':
+		    scnMap = ScnETokenMap, 
+		    mapIndex =	ScnETokenMapIndex,
+		    aliasIndex = ScnETokenMapAliasIndex;
+		    p++;
+		break;
+		case 'O':
+		    scnMap = ScnOTokenMap,
+		    mapIndex = ScnOTokenMapIndex,
+		    aliasIndex = ScnOTokenMapAliasIndex;
+		    p++;
+		break;
+		}
+		/* search direct index */
+		cp = strchr(mapIndex, *p);
+		if (!cp || *cp == '\0') {
+		    /* search wrapper index (multiple chars for same token) */
+		    cp = strchr(aliasIndex[0], *p);
+		    if (!cp || *cp == '\0') {
+			p--; if (scnMap != ScnSTokenMap) p--;
+			goto word_tok;
+		    }
+		    cp = strchr(mapIndex, aliasIndex[1][cp - aliasIndex[0]]);
+		    if (!cp || *cp == '\0') { /* unexpected, but ... */
+		    #ifdef DEBUG
+			Tcl_Panic("token \"%c\" has no map in wrapper resolver", *p);
+		    #endif
+			p--; if (scnMap != ScnSTokenMap) p--;
+			goto word_tok;
+		    }
+		}
+		tok->map = &scnMap[cp - mapIndex];
+		tok->tokWord.start = p;
+
+		/* calculate look ahead value by standing together tokens */
+		if (tok > fss->scnTok) {
+		    ClockScanToken     *prevTok = tok - 1;
+
+		    while (prevTok >= fss->scnTok) {
+			if (prevTok->map->type != tok->map->type) {
+			    break;
+			}
+			prevTok->lookAhMin += tok->map->minSize;
+			prevTok->lookAhMax += tok->map->maxSize;
+			prevTok->lookAhTok++;
+			prevTok--;
+		    }
+		}
+
+		/* increase space count used in format */
+		if ( tok->map->type == CTOKT_CHAR 
+		  && isspace(UCHAR(*((char *)tok->map->data)))
+		) {
+		    fss->scnSpaceCount++;
+		}
+
+		/* next token */
+		AllocTokenInChain(tok, fss->scnTok, fss->scnTokC); tokCnt++;
+		p++;
+		continue;
+	    }
+	    break;
+	    case ' ':
+		cp = strchr(ScnSpecTokenMapIndex, *p);
+		if (!cp || *cp == '\0') {
+		    p--;
+		    goto word_tok;
+		}
+		tok->map = &ScnSpecTokenMap[cp - ScnSpecTokenMapIndex];
+		/* increase space count used in format */
+		fss->scnSpaceCount++;
+		/* next token */
+		AllocTokenInChain(tok, fss->scnTok, fss->scnTokC); tokCnt++;
+		p++;
+		continue;
+	    break;
+	    default:
+word_tok:
+	    if (1) {
+		ClockScanToken	 *wordTok = tok;
+		if (tok > fss->scnTok && (tok-1)->map == &ScnWordTokenMap) {
+		    wordTok = tok-1;
+		}
+		/* new word token */
+		if (wordTok == tok) {
+		    wordTok->tokWord.start = p;
+		    wordTok->map = &ScnWordTokenMap;
+		    AllocTokenInChain(tok, fss->scnTok, fss->scnTokC); tokCnt++;
+		}
+		if (isspace(UCHAR(*p))) {
+		    fss->scnSpaceCount++;
+		}
+		p = TclUtfNext(p);
+		wordTok->tokWord.end = p;
+	    }
+	    break;
+	    }
+	}
+
+	/* calculate end distance value for each tokens */
+	if (tok > fss->scnTok) {
+	    unsigned int	endDist = 0;
+	    ClockScanToken     *prevTok = tok-1;
+
+	    while (prevTok >= fss->scnTok) {
+		prevTok->endDistance = endDist;
+		if (prevTok->map->type != CTOKT_WORD) {
+		    endDist += prevTok->map->minSize;
+		} else {
+		    endDist += prevTok->tokWord.end - prevTok->tokWord.start;
+		}
+		prevTok--;
+	    }
+	}
+
+	/* correct count of real used tokens and free mem if desired
+	 * (1 is acceptable delta to prevent memory fragmentation) */
+	if (fss->scnTokC > tokCnt + (CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE / 2)) {
+	    if ( (tok = ckrealloc(fss->scnTok, tokCnt * sizeof(*tok))) != NULL ) {
+		fss->scnTok = tok;
+	    }
+	}
+	fss->scnTokC = tokCnt;
+
+done:
+	Tcl_MutexUnlock(&ClockFmtMutex);
+    }
+
+    return fss;
+}
+
+/*
+ *----------------------------------------------------------------------
+ */
+int
+ClockScan(
+    register DateInfo *info,	/* Date fields used for parsing & converting */
+    Tcl_Obj *strObj,		/* String containing the time to scan */
+    ClockFmtScnCmdArgs *opts)	/* Command options */
+{
+    ClockClientData *dataPtr = opts->clientData;
+    ClockFmtScnStorage	*fss;
+    ClockScanToken	*tok;
+    ClockScanTokenMap	*map;
+    register const char *p, *x, *end;
+    unsigned short int	 flags = 0;
+    int ret = TCL_ERROR;
+
+    /* get localized format */
+    if (ClockLocalizeFormat(opts) == NULL) {
+	return TCL_ERROR;
+    }
+
+    if ( !(fss = ClockGetOrParseScanFormat(opts->interp, opts->formatObj))
+      || !(tok = fss->scnTok)
+    ) {
+	return TCL_ERROR;
+    }
+
+    /* prepare parsing */
+
+    yyMeridian = MER24;
+
+    p = TclGetString(strObj);
+    end = p + strObj->length;
+    /* in strict mode - bypass spaces at begin / end only (not between tokens) */
+    if (opts->flags & CLF_STRICT) {
+	while (p < end && isspace(UCHAR(*p))) {
+	    p++;
+	}
+    }
+    yyInput = p;
+    /* look ahead to count spaces (bypass it by count length and distances) */
+    x = end;
+    while (p < end) {
+	if (isspace(UCHAR(*p))) {
+	    x = p++;
+	    yySpaceCount++;
+	    continue;
+	}
+	x = end;
+	p++;
+    }
+    /* ignore spaces at end */
+    yySpaceCount -= (end - x);
+    end = x;
+    /* ignore mandatory spaces used in format */
+    yySpaceCount -= fss->scnSpaceCount;
+    if (yySpaceCount < 0) {
+	yySpaceCount = 0;
+    }
+    info->dateStart = p = yyInput;
+    info->dateEnd = end;
+    
+    /* parse string */
+    for (; tok->map != NULL; tok++) {
+	map = tok->map;
+	/* bypass spaces at begin of input before parsing each token */
+	if ( !(opts->flags & CLF_STRICT) 
+	  && ( map->type != CTOKT_SPACE 
+	    && map->type != CTOKT_WORD
+	    && map->type != CTOKT_CHAR )
+	) {
+	    while (p < end && isspace(UCHAR(*p))) {
+		yySpaceCount--;
+		p++;
+	    }
+	}
+	yyInput = p;
+	/* end of input string */
+	if (p >= end) {
+	    break;
+	}
+	switch (map->type)
+	{
+	case CTOKT_DIGIT:
+	if (1) {
+	    int minLen, size;
+	    int sign = 1;
+	    if (map->flags & CLF_SIGNED) {
+		if (*p == '+') { yyInput = ++p; }
+		else
+		if (*p == '-') { yyInput = ++p; sign = -1; };
+	    }
+
+	    DetermineGreedySearchLen(opts, info, tok, &minLen, &size);
+
+	    if (size < map->minSize) {
+		/* missing input -> error */
+		if ((map->flags & CLF_OPTIONAL)) {
+		    continue;
+		}
+		goto not_match;
+	    }
+	    /* string 2 number, put number into info structure by offset */
+	    if (map->offs) {
+		p = yyInput; x = p + size;
+		if (!(map->flags & (CLF_LOCALSEC|CLF_POSIXSEC))) {
+		    if (_str2int((int *)(((char *)info) + map->offs), 
+			    p, x, sign) != TCL_OK) {
+			goto overflow;
+		    }
+		    p = x;
+		} else {
+		    if (_str2wideInt((Tcl_WideInt *)(((char *)info) + map->offs), 
+			    p, x, sign) != TCL_OK) {
+			goto overflow;
+		    }
+		    p = x;
+		}
+		flags = (flags & ~map->clearFlags) | map->flags;
+	    }
+	}
+	break;
+	case CTOKT_PARSER:
+	    switch (map->parser(opts, info, tok)) {
+		case TCL_OK:
+		break;
+		case TCL_RETURN:
+		    if ((map->flags & CLF_OPTIONAL)) {
+			yyInput = p;
+			continue;
+		    }
+		    goto not_match;
+		break;
+		default:
+		    goto done;
+		break;
+	    };
+	    /* decrement count for possible spaces in match */
+	    while (p < yyInput) {
+		if (isspace(UCHAR(*p++))) {
+		    yySpaceCount--;
+		}
+	    }
+	    p = yyInput;
+	    flags = (flags & ~map->clearFlags) | map->flags;
+	break;
+	case CTOKT_SPACE:
+	    /* at least one space */
+	    if (!isspace(UCHAR(*p))) {
+		/* unmatched -> error */
+		goto not_match;
+	    }
+	    yySpaceCount--;
+	    p++;
+	    while (p < end && isspace(UCHAR(*p))) {
+		yySpaceCount--;
+		p++;
+	    }
+	break;
+	case CTOKT_WORD:
+	    x = FindWordEnd(tok, p, end);
+	    if (!x) {
+		/* no match -> error */
+		goto not_match;
+	    }
+	    p = x;
+	break;
+	case CTOKT_CHAR:
+	    x = (char *)map->data;
+	    if (*x != *p) {
+		/* no match -> error */
+		goto not_match;
+	    }
+	    if (isspace(UCHAR(*x))) {
+		yySpaceCount--;
+	    }
+	    p++;
+	break;
+	}
+    }
+    /* check end was reached */
+    if (p < end) {
+	/* something after last token - wrong format */
+	goto not_match;
+    }
+    /* end of string, check only optional tokens at end, otherwise - not match */
+    while (tok->map != NULL) {
+	if (!(opts->flags & CLF_STRICT) && (tok->map->type == CTOKT_SPACE)) {
+	    tok++;
+	    if (tok->map == NULL) break;
+	}
+	if (!(tok->map->flags & CLF_OPTIONAL)) {
+	    goto not_match;
+	}
+	tok++;
+    }
+
+    /* 
+     * Invalidate result 
+     */
+
+    /* seconds token (%s) take precedence over all other tokens */
+    if ((opts->flags & CLF_EXTENDED) || !(flags & CLF_POSIXSEC)) {
+	if (flags & CLF_DATE) {
+
+	    if (!(flags & CLF_JULIANDAY)) {
+		info->flags |= CLF_ASSEMBLE_SECONDS|CLF_ASSEMBLE_JULIANDAY;
+
+		/* dd precedence below ddd */
+		switch (flags & (CLF_MONTH|CLF_DAYOFYEAR|CLF_DAYOFMONTH)) {
+		    case (CLF_DAYOFYEAR|CLF_DAYOFMONTH):
+		    /* miss month: ddd over dd (without month) */
+		    flags &= ~CLF_DAYOFMONTH;
+		    case (CLF_DAYOFYEAR):
+		    /* ddd over naked weekday */
+		    if (!(flags & CLF_ISO8601YEAR)) {
+			flags &= ~CLF_ISO8601;
+		    }
+		    break;
+		    case (CLF_MONTH|CLF_DAYOFYEAR|CLF_DAYOFMONTH):
+		    /* both available: mmdd over ddd */
+		    flags &= ~CLF_DAYOFYEAR;
+		    case (CLF_MONTH|CLF_DAYOFMONTH):
+		    case (CLF_DAYOFMONTH):
+		    /* mmdd / dd over naked weekday */
+		    if (!(flags & CLF_ISO8601YEAR)) {
+			flags &= ~CLF_ISO8601;
+		    }
+		    break;
+		}
+
+		/* YearWeekDay below YearMonthDay */
+		if ( (flags & CLF_ISO8601) 
+		  && ( (flags & (CLF_YEAR|CLF_DAYOFYEAR)) == (CLF_YEAR|CLF_DAYOFYEAR)
+		    || (flags & (CLF_YEAR|CLF_DAYOFMONTH|CLF_MONTH)) == (CLF_YEAR|CLF_DAYOFMONTH|CLF_MONTH)
+		  ) 
+		) {
+		    /* yy precedence below yyyy */
+		    if (!(flags & CLF_ISO8601CENTURY) && (flags & CLF_CENTURY)) {
+			/* normally precedence of ISO is higher, but no century - so put it down */
+			flags &= ~CLF_ISO8601;
+		    } 
+		    else 
+		    /* yymmdd or yyddd over naked weekday */
+		    if (!(flags & CLF_ISO8601YEAR)) {
+			flags &= ~CLF_ISO8601;
+		    }
+		}
+
+		if (!(flags & CLF_ISO8601)) {
+		    if (yyYear < 100) {
+			if (!(flags & CLF_CENTURY)) {
+			    if (yyYear >= dataPtr->yearOfCenturySwitch) {
+				yyYear -= 100;
+			    }
+			    yyYear += dataPtr->currentYearCentury;
+			} else {
+			    yyYear += info->dateCentury * 100;
+			}
+		    }
+		} else {
+		    if (info->date.iso8601Year < 100) {
+			if (!(flags & CLF_ISO8601CENTURY)) {
+			    if (info->date.iso8601Year >= dataPtr->yearOfCenturySwitch) {
+				info->date.iso8601Year -= 100;
+			    }
+			    info->date.iso8601Year += dataPtr->currentYearCentury;
+			} else {
+			    info->date.iso8601Year += info->dateCentury * 100;
+			}
+		    }
+		}
+	    }
+	}
+
+	/* if no time - reset time */
+	if (!(flags & (CLF_TIME|CLF_LOCALSEC|CLF_POSIXSEC))) {
+	    info->flags |= CLF_ASSEMBLE_SECONDS;
+	    yydate.localSeconds = 0;
+	}
+
+	if (flags & CLF_TIME) {
+	    info->flags |= CLF_ASSEMBLE_SECONDS;
+	    yySeconds = ToSeconds(yyHour, yyMinutes,
+				yySeconds, yyMeridian);
+	} else
+	if (!(flags & (CLF_LOCALSEC|CLF_POSIXSEC))) {
+	    info->flags |= CLF_ASSEMBLE_SECONDS;
+	    yySeconds = yydate.localSeconds % SECONDS_PER_DAY;
+	}
+    }
+
+    /* tell caller which flags were set */
+    info->flags |= flags;
+
+    ret = TCL_OK;
+    goto done;
+
+overflow:
+
+    Tcl_SetResult(opts->interp, "requested date too large to represent", 
+	TCL_STATIC);
+    Tcl_SetErrorCode(opts->interp, "CLOCK", "dateTooLarge", NULL);
+    goto done;
+
+not_match:
+
+    Tcl_SetResult(opts->interp, "input string does not match supplied format",
+	TCL_STATIC);
+    Tcl_SetErrorCode(opts->interp, "CLOCK", "badInputString", NULL);
+
+done:
+
+    return ret;
+}
+
+static inline int
+FrmResultAllocate(
+    register DateFormat *dateFmt,
+    int len)
+{
+    int needed = dateFmt->output + len - dateFmt->resEnd;
+    if (needed >= 0) { /* >= 0 - regards NTS zero */
+	int newsize = dateFmt->resEnd - dateFmt->resMem 
+		    + needed + MIN_FMT_RESULT_BLOCK_ALLOC;
+	char *newRes = ckrealloc(dateFmt->resMem, newsize);
+	if (newRes == NULL) {
+	    return TCL_ERROR;
+	}
+	dateFmt->output = newRes + (dateFmt->output - dateFmt->resMem);
+	dateFmt->resMem = newRes;
+	dateFmt->resEnd = newRes + newsize;
+    }
+    return TCL_OK;
+}
+
+static int
+ClockFmtToken_HourAMPM_Proc(
+    ClockFmtScnCmdArgs *opts,
+    DateFormat *dateFmt,
+    ClockFormatToken *tok,
+    int *val)
+{
+    *val = ( ( ( *val % SECONDS_PER_DAY ) + SECONDS_PER_DAY - 3600 ) / 3600 ) % 12 + 1;
+    return TCL_OK;
+}
+
+static int
+ClockFmtToken_AMPM_Proc(
+    ClockFmtScnCmdArgs *opts,
+    DateFormat *dateFmt,
+    ClockFormatToken *tok,
+    int *val)
+{
+    Tcl_Obj *mcObj;
+    const char *s;
+    int len;
+
+    if ((*val % SECONDS_PER_DAY) < (SECONDS_PER_DAY / 2)) {
+	mcObj = ClockMCGet(opts, MCLIT_AM);
+    } else {
+	mcObj = ClockMCGet(opts, MCLIT_PM);
+    }
+    if (mcObj == NULL) {
+	return TCL_ERROR;
+    }
+    s = TclGetString(mcObj); len = mcObj->length;
+    if (FrmResultAllocate(dateFmt, len) != TCL_OK) { return TCL_ERROR; };
+    memcpy(dateFmt->output, s, len + 1);
+    if (*tok->tokWord.start == 'p') {
+	len = Tcl_UtfToUpper(dateFmt->output);
+    }
+    dateFmt->output += len;
+
+    return TCL_OK;
+}
+
+static int
+ClockFmtToken_StarDate_Proc(
+    ClockFmtScnCmdArgs *opts,
+    DateFormat *dateFmt,
+    ClockFormatToken *tok,
+    int *val)
+ {
+    int fractYear;
+    /* Get day of year, zero based */
+    int v = dateFmt->date.dayOfYear - 1;
+
+    /* Convert day of year to a fractional year */
+    if (IsGregorianLeapYear(&dateFmt->date)) {
+	fractYear = 1000 * v / 366;
+    } else {
+	fractYear = 1000 * v / 365;
+    }
+
+    /* Put together the StarDate as "Stardate %02d%03d.%1d" */
+    if (FrmResultAllocate(dateFmt, 30) != TCL_OK) { return TCL_ERROR; };
+    memcpy(dateFmt->output, "Stardate ", 9);
+    dateFmt->output += 9;
+    dateFmt->output = _itoaw(dateFmt->output, 
+	dateFmt->date.year - RODDENBERRY, '0', 2);
+    dateFmt->output = _itoaw(dateFmt->output, 
+	fractYear, '0', 3);
+    *dateFmt->output++ = '.';
+    /* be sure positive after decimal point (note: clock-value can be negative) */
+    v = dateFmt->date.localSeconds % SECONDS_PER_DAY / ( SECONDS_PER_DAY / 10 );
+    if (v < 0) v = 10 + v;
+    dateFmt->output = _itoaw(dateFmt->output, v, '0', 1);
+
+    return TCL_OK;
+}
+static int
+ClockFmtToken_WeekOfYear_Proc(
+    ClockFmtScnCmdArgs *opts,
+    DateFormat *dateFmt,
+    ClockFormatToken *tok,
+    int *val)
+{
+    int dow = dateFmt->date.dayOfWeek;
+    if (*tok->tokWord.start == 'U') {
+	if (dow == 7) {
+	    dow = 0;
+	}
+	dow++;
+    }
+    *val = ( dateFmt->date.dayOfYear - dow + 7 ) / 7;
+    return TCL_OK;
+}
+static int
+ClockFmtToken_TimeZone_Proc(
+    ClockFmtScnCmdArgs *opts,
+    DateFormat *dateFmt,
+    ClockFormatToken *tok,
+    int *val)
+{
+    if (*tok->tokWord.start == 'z') {
+	int z = dateFmt->date.tzOffset;
+	char sign = '+';
+	if ( z < 0 ) {
+	    z = -z;
+	    sign = '-';
+	}
+	if (FrmResultAllocate(dateFmt, 7) != TCL_OK) { return TCL_ERROR; };
+	*dateFmt->output++ = sign;
+	dateFmt->output = _itoaw(dateFmt->output, z / 3600, '0', 2);
+	z %= 3600;
+	dateFmt->output = _itoaw(dateFmt->output, z / 60, '0', 2);
+	z %= 60;
+	if (z != 0) {
+	    dateFmt->output = _itoaw(dateFmt->output, z, '0', 2);
+	}
+    } else {
+	Tcl_Obj * objPtr;
+	const char *s; int len;
+	/* convert seconds to local seconds to obtain tzName object */
+	if (ConvertUTCToLocal(opts->clientData, opts->interp,
+		&dateFmt->date, opts->timezoneObj, 
+		GREGORIAN_CHANGE_DATE) != TCL_OK) {
+	    return TCL_ERROR;
+	};
+	objPtr = dateFmt->date.tzName;
+	s = TclGetString(objPtr);
+	len = objPtr->length;
+	if (FrmResultAllocate(dateFmt, len) != TCL_OK) { return TCL_ERROR; };
+	memcpy(dateFmt->output, s, len + 1);
+	dateFmt->output += len;
+    }
+    return TCL_OK;
+}
+
+static int
+ClockFmtToken_LocaleERA_Proc(
+    ClockFmtScnCmdArgs *opts,
+    DateFormat *dateFmt,
+    ClockFormatToken *tok,
+    int *val)
+{
+    Tcl_Obj *mcObj;
+    const char *s;
+    int len;
+
+    if (dateFmt->date.era == BCE) {
+	mcObj = ClockMCGet(opts, MCLIT_BCE);
+    } else {
+	mcObj = ClockMCGet(opts, MCLIT_CE);
+    }
+    if (mcObj == NULL) {
+	return TCL_ERROR;
+    }
+    s = TclGetString(mcObj); len = mcObj->length;
+    if (FrmResultAllocate(dateFmt, len) != TCL_OK) { return TCL_ERROR; };
+    memcpy(dateFmt->output, s, len + 1);
+    dateFmt->output += len;
+
+    return TCL_OK;
+}
+
+static int
+ClockFmtToken_LocaleERAYear_Proc(
+    ClockFmtScnCmdArgs *opts,
+    DateFormat *dateFmt,
+    ClockFormatToken *tok,
+    int *val)
+{
+    int rowc;
+    Tcl_Obj **rowv;
+
+    if (dateFmt->localeEra == NULL) {
+	Tcl_Obj *mcObj = ClockMCGet(opts, MCLIT_LOCALE_ERAS);
+	if (mcObj == NULL) {
+	    return TCL_ERROR;
+	}
+	if (TclListObjGetElements(opts->interp, mcObj, &rowc, &rowv) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+	if (rowc != 0) {
+	    dateFmt->localeEra = LookupLastTransition(opts->interp, 
+		dateFmt->date.localSeconds, rowc, rowv, NULL);
+	}
+	if (dateFmt->localeEra == NULL) {
+	    dateFmt->localeEra = (Tcl_Obj*)1;
+	}
+    }
+
+    /* if no LOCALE_ERAS in catalog or era not found */
+    if (dateFmt->localeEra == (Tcl_Obj*)1) {
+	if (FrmResultAllocate(dateFmt, 11) != TCL_OK) { return TCL_ERROR; };
+	if (*tok->tokWord.start == 'C') { /* %EC */
+	    *val = dateFmt->date.year / 100;
+	    dateFmt->output = _itoaw(dateFmt->output, 
+		*val, '0', 2);
+	} else {			  /* %Ey */
+	    *val = dateFmt->date.year % 100;
+	    dateFmt->output = _itoaw(dateFmt->output, 
+		*val, '0', 2);
+	}
+    } else {
+	Tcl_Obj *objPtr;
+	const char *s;
+	int len;
+	if (*tok->tokWord.start == 'C') { /* %EC */
+	    if (Tcl_ListObjIndex(opts->interp, dateFmt->localeEra, 1,
+			&objPtr) != TCL_OK ) {
+		return TCL_ERROR;
+	    }
+	} else {			  /* %Ey */
+	    if (Tcl_ListObjIndex(opts->interp, dateFmt->localeEra, 2,
+			&objPtr) != TCL_OK ) {
+		return TCL_ERROR;
+	    }
+	    if (Tcl_GetIntFromObj(opts->interp, objPtr, val) != TCL_OK) {
+		return TCL_ERROR;
+	    }
+	    *val = dateFmt->date.year - *val;
+	    /* if year in locale numerals */
+	    if (*val >= 0 && *val < 100) {
+		/* year as integer */
+		Tcl_Obj * mcObj = ClockMCGet(opts, MCLIT_LOCALE_NUMERALS);
+		if (mcObj == NULL) {
+		    return TCL_ERROR;
+		}
+		if (Tcl_ListObjIndex(opts->interp, mcObj, *val, &objPtr) != TCL_OK) {
+		    return TCL_ERROR;
+		}
+	    } else {
+		/* year as integer */
+		if (FrmResultAllocate(dateFmt, 11) != TCL_OK) { return TCL_ERROR; };
+		dateFmt->output = _itoaw(dateFmt->output, 
+		    *val, '0', 2);
+		return TCL_OK;
+	    }
+	}
+	s = TclGetString(objPtr);
+	len = objPtr->length;
+	if (FrmResultAllocate(dateFmt, len) != TCL_OK) { return TCL_ERROR; };
+	memcpy(dateFmt->output, s, len + 1);
+	dateFmt->output += len;
+    }
+    return TCL_OK;
+}
+
+
+static const char *FmtSTokenMapIndex = 
+    "demNbByYCHMSIklpaAuwUVzgGjJsntQ";
+static ClockFormatTokenMap FmtSTokenMap[] = {
+    /* %d */
+    {CFMTT_INT, "0", 2, 0, 0, 0, TclOffset(DateFormat, date.dayOfMonth), NULL},
+    /* %e */
+    {CFMTT_INT, " ", 2, 0, 0, 0, TclOffset(DateFormat, date.dayOfMonth), NULL},
+    /* %m */
+    {CFMTT_INT, "0", 2, 0, 0, 0, TclOffset(DateFormat, date.month), NULL},
+    /* %N */
+    {CFMTT_INT, " ", 2, 0, 0, 0, TclOffset(DateFormat, date.month), NULL},
+    /* %b %h */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX | CLFMT_DECR, 0, 12, TclOffset(DateFormat, date.month),
+	NULL, (void *)MCLIT_MONTHS_ABBREV},
+    /* %B */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX | CLFMT_DECR, 0, 12, TclOffset(DateFormat, date.month),
+	NULL, (void *)MCLIT_MONTHS_FULL},
+    /* %y */
+    {CFMTT_INT, "0", 2, 0, 0, 100, TclOffset(DateFormat, date.year), NULL},
+    /* %Y */
+    {CFMTT_INT, "0", 4, 0, 0, 0, TclOffset(DateFormat, date.year), NULL},
+    /* %C */
+    {CFMTT_INT, "0", 2, 0, 100, 0, TclOffset(DateFormat, date.year), NULL},
+    /* %H */
+    {CFMTT_INT, "0", 2, 0, 3600, 24, TclOffset(DateFormat, date.secondOfDay), NULL},
+    /* %M */
+    {CFMTT_INT, "0", 2, 0, 60, 60, TclOffset(DateFormat, date.secondOfDay), NULL},
+    /* %S */
+    {CFMTT_INT, "0", 2, 0, 0, 60, TclOffset(DateFormat, date.secondOfDay), NULL},
+    /* %I */
+    {CFMTT_INT, "0", 2, CLFMT_CALC, 0, 0, TclOffset(DateFormat, date.secondOfDay), 
+	ClockFmtToken_HourAMPM_Proc, NULL},
+    /* %k */
+    {CFMTT_INT, " ", 2, 0, 3600, 24, TclOffset(DateFormat, date.secondOfDay), NULL},
+    /* %l */
+    {CFMTT_INT, " ", 2, CLFMT_CALC, 0, 0, TclOffset(DateFormat, date.secondOfDay), 
+	ClockFmtToken_HourAMPM_Proc, NULL},
+    /* %p %P */
+    {CFMTT_INT, NULL, 0, 0, 0, 0, TclOffset(DateFormat, date.secondOfDay), 
+	ClockFmtToken_AMPM_Proc, NULL},
+    /* %a */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 7, TclOffset(DateFormat, date.dayOfWeek),
+	NULL, (void *)MCLIT_DAYS_OF_WEEK_ABBREV},
+    /* %A */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 7, TclOffset(DateFormat, date.dayOfWeek),
+	NULL, (void *)MCLIT_DAYS_OF_WEEK_FULL},
+    /* %u */
+    {CFMTT_INT, " ", 1, 0, 0, 0, TclOffset(DateFormat, date.dayOfWeek), NULL},
+    /* %w */
+    {CFMTT_INT, " ", 1, 0, 0, 7, TclOffset(DateFormat, date.dayOfWeek), NULL},
+    /* %U %W */
+    {CFMTT_INT, "0", 2, CLFMT_CALC, 0, 0, TclOffset(DateFormat, date.dayOfYear), 
+	ClockFmtToken_WeekOfYear_Proc, NULL},
+    /* %V */
+    {CFMTT_INT, "0", 2, 0, 0, 0, TclOffset(DateFormat, date.iso8601Week), NULL},
+    /* %z %Z */
+    {CFMTT_INT, NULL, 0, 0, 0, 0, 0, 
+	ClockFmtToken_TimeZone_Proc, NULL},
+    /* %g */
+    {CFMTT_INT, "0", 2, 0, 0, 100, TclOffset(DateFormat, date.iso8601Year), NULL},
+    /* %G */
+    {CFMTT_INT, "0", 4, 0, 0, 0, TclOffset(DateFormat, date.iso8601Year), NULL},
+    /* %j */
+    {CFMTT_INT, "0", 3, 0, 0, 0, TclOffset(DateFormat, date.dayOfYear), NULL},
+    /* %J */
+    {CFMTT_INT, "0", 7, 0, 0, 0, TclOffset(DateFormat, date.julianDay), NULL},
+    /* %s */
+    {CFMTT_WIDE, "0", 1, 0, 0, 0, TclOffset(DateFormat, date.seconds), NULL},
+    /* %n */
+    {CTOKT_CHAR, "\n", 0, 0, 0, 0, 0, NULL},
+    /* %t */
+    {CTOKT_CHAR, "\t", 0, 0, 0, 0, 0, NULL},
+    /* %Q */
+    {CFMTT_INT, NULL, 0, 0, 0, 0, 0, 
+	ClockFmtToken_StarDate_Proc, NULL},
+};
+static const char *FmtSTokenMapAliasIndex[2] = {
+    "hPWZ",
+    "bpUz"
+};
+
+static const char *FmtETokenMapIndex = 
+    "Eys";
+static ClockFormatTokenMap FmtETokenMap[] = {
+    /* %EE */
+    {CFMTT_INT, NULL, 0, 0, 0, 0, TclOffset(DateFormat, date.era), 
+	ClockFmtToken_LocaleERA_Proc, NULL},
+    /* %Ey %EC */
+    {CFMTT_INT, NULL, 0, 0, 0, 0, TclOffset(DateFormat, date.year),
+	ClockFmtToken_LocaleERAYear_Proc, NULL},
+    /* %Es */
+    {CFMTT_WIDE, "0", 1, 0, 0, 0, TclOffset(DateFormat, date.localSeconds), NULL},
+};
+static const char *FmtETokenMapAliasIndex[2] = {
+    "C",
+    "y"
+};
+
+static const char *FmtOTokenMapIndex = 
+    "dmyHIMSuw";
+static ClockFormatTokenMap FmtOTokenMap[] = {
+    /* %Od %Oe */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 100, TclOffset(DateFormat, date.dayOfMonth),
+	NULL, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Om */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 100, TclOffset(DateFormat, date.month),
+	NULL, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Oy */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 100, TclOffset(DateFormat, date.year),
+	NULL, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %OH %Ok */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 3600, 24, TclOffset(DateFormat, date.secondOfDay), 
+	NULL, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %OI %Ol */
+    {CFMTT_INT, NULL, 0, CLFMT_CALC | CLFMT_LOCALE_INDX, 0, 0, TclOffset(DateFormat, date.secondOfDay), 
+	ClockFmtToken_HourAMPM_Proc, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %OM */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 60, 60, TclOffset(DateFormat, date.secondOfDay), 
+	NULL, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %OS */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 60, TclOffset(DateFormat, date.secondOfDay), 
+	NULL, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Ou */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 100, TclOffset(DateFormat, date.dayOfWeek),
+	NULL, (void *)MCLIT_LOCALE_NUMERALS},
+    /* %Ow */
+    {CFMTT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 7, TclOffset(DateFormat, date.dayOfWeek), 
+	NULL, (void *)MCLIT_LOCALE_NUMERALS},
+};
+static const char *FmtOTokenMapAliasIndex[2] = {
+    "ekl",
+    "dHI"
+};
+
+static ClockFormatTokenMap FmtWordTokenMap = {
+    CTOKT_WORD, NULL, 0, 0, 0, 0, 0, NULL
+};
+
+/*
+ *----------------------------------------------------------------------
+ */
+ClockFmtScnStorage *
+ClockGetOrParseFmtFormat(
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    Tcl_Obj    *formatObj)	/* Format container */
+{
+    ClockFmtScnStorage *fss;
+    ClockFormatToken   *tok;
+
+    fss = Tcl_GetClockFrmScnFromObj(interp, formatObj);
+    if (fss == NULL) {
+	return NULL;
+    }
+
+    /* if first time scanning - tokenize format */
+    if (fss->fmtTok == NULL) {
+	unsigned int tokCnt;
+	register const char *p, *e, *cp;
+
+	e = p = HashEntry4FmtScn(fss)->key.string;
+	e += strlen(p);
+
+	/* estimate token count by % char and format length */
+	fss->fmtTokC = EstimateTokenCount(p, e);
+
+	Tcl_MutexLock(&ClockFmtMutex);
+
+	fss->fmtTok = tok = ckalloc(sizeof(*tok) * fss->fmtTokC);
+	memset(tok, 0, sizeof(*(tok)));
+	tokCnt = 1;
+	while (p < e) {
+	    switch (*p) {
+	    case '%':
+	    if (1) {
+		ClockFormatTokenMap * fmtMap = FmtSTokenMap;
+		const char *mapIndex =	FmtSTokenMapIndex,
+			  **aliasIndex = FmtSTokenMapAliasIndex;
+		if (p+1 >= e) {
+		    goto word_tok;
+		}
+		p++;
+		/* try to find modifier: */
+		switch (*p) {
+		case '%':
+		    /* begin new word token - don't join with previous word token, 
+		     * because current mapping should be "...%%..." -> "...%..." */
+		    tok->map = &FmtWordTokenMap;
+		    tok->tokWord.start = p;
+		    tok->tokWord.end = p+1;
+		    AllocTokenInChain(tok, fss->fmtTok, fss->fmtTokC); tokCnt++;
+		    p++;
+		    continue;
+		break;
+		case 'E':
+		    fmtMap = FmtETokenMap, 
+		    mapIndex =	FmtETokenMapIndex,
+		    aliasIndex = FmtETokenMapAliasIndex;
+		    p++;
+		break;
+		case 'O':
+		    fmtMap = FmtOTokenMap,
+		    mapIndex = FmtOTokenMapIndex,
+		    aliasIndex = FmtOTokenMapAliasIndex;
+		    p++;
+		break;
+		}
+		/* search direct index */
+		cp = strchr(mapIndex, *p);
+		if (!cp || *cp == '\0') {
+		    /* search wrapper index (multiple chars for same token) */
+		    cp = strchr(aliasIndex[0], *p);
+		    if (!cp || *cp == '\0') {
+			p--; if (fmtMap != FmtSTokenMap) p--;
+			goto word_tok;
+		    }
+		    cp = strchr(mapIndex, aliasIndex[1][cp - aliasIndex[0]]);
+		    if (!cp || *cp == '\0') { /* unexpected, but ... */
+		    #ifdef DEBUG
+			Tcl_Panic("token \"%c\" has no map in wrapper resolver", *p);
+		    #endif
+			p--; if (fmtMap != FmtSTokenMap) p--;
+			goto word_tok;
+		    }
+		}
+		tok->map = &fmtMap[cp - mapIndex];
+		tok->tokWord.start = p;
+		/* next token */
+		AllocTokenInChain(tok, fss->fmtTok, fss->fmtTokC); tokCnt++;
+		p++;
+		continue;
+	    }
+	    break;
+	    default:
+word_tok:
+	    if (1) {
+		ClockFormatToken *wordTok = tok;
+		if (tok > fss->fmtTok && (tok-1)->map == &FmtWordTokenMap) {
+		    wordTok = tok-1;
+		}
+		if (wordTok == tok) {
+		    wordTok->tokWord.start = p;
+		    wordTok->map = &FmtWordTokenMap;
+		    AllocTokenInChain(tok, fss->fmtTok, fss->fmtTokC); tokCnt++;
+		}
+		p = TclUtfNext(p);
+		wordTok->tokWord.end = p;
+	    }
+	    break;
+	    }
+	}
+
+	/* correct count of real used tokens and free mem if desired
+	 * (1 is acceptable delta to prevent memory fragmentation) */
+	if (fss->fmtTokC > tokCnt + (CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE / 2)) {
+	    if ( (tok = ckrealloc(fss->fmtTok, tokCnt * sizeof(*tok))) != NULL ) {
+		fss->fmtTok = tok;
+	    }
+	}
+	fss->fmtTokC = tokCnt;
+
+done:
+	Tcl_MutexUnlock(&ClockFmtMutex);
+    }
+
+    return fss;
+}
+
+/*
+ *----------------------------------------------------------------------
+ */
+int
+ClockFormat(
+    register DateFormat *dateFmt, /* Date fields used for parsing & converting */
+    ClockFmtScnCmdArgs *opts)	  /* Command options */
+{
+    ClockFmtScnStorage	*fss;
+    ClockFormatToken	*tok;
+    ClockFormatTokenMap *map;
+
+    /* get localized format */
+    if (ClockLocalizeFormat(opts) == NULL) {
+	return TCL_ERROR;
+    }
+
+    if ( !(fss = ClockGetOrParseFmtFormat(opts->interp, opts->formatObj))
+      || !(tok = fss->fmtTok)
+    ) {
+	return TCL_ERROR;
+    }
+
+    /* prepare formatting */
+    dateFmt->date.secondOfDay = (int)(dateFmt->date.localSeconds % SECONDS_PER_DAY);
+    if (dateFmt->date.secondOfDay < 0) {
+	dateFmt->date.secondOfDay += SECONDS_PER_DAY;
+    }
+    
+    /* result container object */
+    dateFmt->resMem = ckalloc(MIN_FMT_RESULT_BLOCK_ALLOC);
+    if (dateFmt->resMem == NULL) {
+	return TCL_ERROR;
+    }
+    dateFmt->output = dateFmt->resMem;
+    dateFmt->resEnd = dateFmt->resMem + MIN_FMT_RESULT_BLOCK_ALLOC;
+    *dateFmt->output = '\0';
+
+    /* do format each token */
+    for (; tok->map != NULL; tok++) {
+	map = tok->map;
+	switch (map->type)
+	{
+	case CFMTT_INT:
+	if (1) {
+	    int val = (int)*(int *)(((char *)dateFmt) + map->offs);
+	    if (map->fmtproc == NULL) {
+		if (map->flags & CLFMT_DECR) {
+		    val--;
+		}
+		if (map->flags & CLFMT_INCR) {
+		    val++;
+		}
+		if (map->divider) {
+		    val /= map->divider;
+		}
+		if (map->divmod) {
+		    val %= map->divmod;
+		}
+	    } else {
+		if (map->fmtproc(opts, dateFmt, tok, &val) != TCL_OK) {
+		    goto done;
+		}
+		/* if not calculate only (output inside fmtproc) */
+		if (!(map->flags & CLFMT_CALC)) {
+		    continue;
+		}
+	    }
+	    if (!(map->flags & CLFMT_LOCALE_INDX)) {
+		if (FrmResultAllocate(dateFmt, 11) != TCL_OK) { goto error; };
+		if (map->width) {
+		    dateFmt->output = _itoaw(dateFmt->output, val, *map->tostr, map->width);
+		} else {
+		    dateFmt->output += sprintf(dateFmt->output, map->tostr, val);
+		}
+	    } else {
+		const char *s;
+		Tcl_Obj * mcObj = ClockMCGet(opts, PTR2INT(map->data) /* mcKey */);
+		if (mcObj == NULL) {
+		    goto error;
+		}
+		if ( Tcl_ListObjIndex(opts->interp, mcObj, val, &mcObj) != TCL_OK
+		  || mcObj == NULL
+		) {
+		    goto error;
+		}
+		s = TclGetString(mcObj);
+		if (FrmResultAllocate(dateFmt, mcObj->length) != TCL_OK) { goto error; };
+		memcpy(dateFmt->output, s, mcObj->length + 1);
+		dateFmt->output += mcObj->length;
+	    }
+	}
+	break;
+	case CFMTT_WIDE:
+	if (1) {
+	    Tcl_WideInt val = *(Tcl_WideInt *)(((char *)dateFmt) + map->offs);
+	    if (FrmResultAllocate(dateFmt, 21) != TCL_OK) { goto error; };
+	    if (map->width) {
+		dateFmt->output = _witoaw(dateFmt->output, val, *map->tostr, map->width);
+	    } else {
+		dateFmt->output += sprintf(dateFmt->output, map->tostr, val);
+	    }
+	}
+	break;
+	case CTOKT_CHAR:
+	    if (FrmResultAllocate(dateFmt, 1) != TCL_OK) { goto error; };
+	    *dateFmt->output++ = *map->tostr;
+	break;
+	case CFMTT_PROC:
+	    if (map->fmtproc(opts, dateFmt, tok, NULL) != TCL_OK) {
+		goto error;
+	    };
+	break;
+	case CTOKT_WORD:
+	    if (1) {
+		int len = tok->tokWord.end - tok->tokWord.start;
+		if (FrmResultAllocate(dateFmt, len) != TCL_OK) { goto error; };
+		if (len == 1) {
+		    *dateFmt->output++ = *tok->tokWord.start;
+		} else {
+		    memcpy(dateFmt->output, tok->tokWord.start, len);
+		    dateFmt->output += len;
+		}
+	    }
+	break;
+	}
+    }
+
+    goto done;
+
+error:
+
+    ckfree(dateFmt->resMem);
+    dateFmt->resMem = NULL;
+
+done:
+
+    if (dateFmt->resMem) {
+	Tcl_Obj * result = Tcl_NewObj();
+	result->length = dateFmt->output - dateFmt->resMem;
+	result->bytes = NULL;
+	result->bytes = ckrealloc(dateFmt->resMem, result->length+1);
+	if (result->bytes == NULL) {
+	    result->bytes = dateFmt->resMem;
+	}
+	result->bytes[result->length] = '\0';
+	Tcl_SetObjResult(opts->interp, result);
+	return TCL_OK;
+    }
+
+    return TCL_ERROR;
+}
+
+
+MODULE_SCOPE void
+ClockFrmScnClearCaches(void)
+{
+    Tcl_MutexLock(&ClockFmtMutex);
+    /* clear caches ... */
+    Tcl_MutexUnlock(&ClockFmtMutex);
+}
+
+static void
+ClockFrmScnFinalize(
+    ClientData clientData)  /* Not used. */
+{
+    Tcl_MutexLock(&ClockFmtMutex);
+#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
+    /* clear GC */
+    ClockFmtScnStorage_GC.stackPtr = NULL;
+    ClockFmtScnStorage_GC.stackBound = NULL;
+    ClockFmtScnStorage_GC.count = 0;
+#endif
+    if (initialized) {
+	Tcl_DeleteHashTable(&FmtScnHashTable);
+	initialized = 0;
+    }
+    Tcl_MutexUnlock(&ClockFmtMutex);
+    Tcl_MutexFinalize(&ClockFmtMutex);
+}
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c
index 885a0bc..8c2c026 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -17,6 +17,7 @@
  */
 
 #include "tclInt.h"
+#include "tclCompile.h"
 #include "tclRegexp.h"
 #include "tclStringTrim.h"
 
@@ -4146,7 +4147,7 @@ Tcl_TimeObjCmd(
     start = TclpGetWideClicks();
 #endif
     while (i-- > 0) {
-	result = Tcl_EvalObjEx(interp, objPtr, 0);
+	result = TclEvalObjEx(interp, objPtr, 0, NULL, 0);
 	if (result != TCL_OK) {
 	    return result;
 	}
@@ -4186,6 +4187,351 @@ Tcl_TimeObjCmd(
 /*
  *----------------------------------------------------------------------
  *
+ * Tcl_TimeRateObjCmd --
+ *
+ *	This object-based procedure is invoked to process the "timerate" Tcl
+ *	command. 
+ *	This is similar to command "time", except the execution limited by 
+ *	given time (in milliseconds) instead of repetition count.
+ *
+ * Example:
+ *	timerate {after 5} 1000 ; # equivalent for `time {after 5} [expr 1000/5]`
+ *
+ * Results:
+ *	A standard Tcl object result.
+ *
+ * Side effects:
+ *	See the user documentation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_TimeRateObjCmd(
+    ClientData dummy,		/* Not used. */
+    Tcl_Interp *interp,		/* Current interpreter. */
+    int objc,			/* Number of arguments. */
+    Tcl_Obj *const objv[])	/* Argument objects. */
+{
+    static 
+    double measureOverhead = 0; /* global measure-overhead */
+    double overhead = -1;	/* given measure-overhead */
+    register Tcl_Obj *objPtr;
+    register int result, i;
+    Tcl_Obj *calibrate = NULL, *direct = NULL;
+    Tcl_WideInt count = 0;	/* Holds repetition count */
+    Tcl_WideInt maxms = -0x7FFFFFFFFFFFFFFFL; 
+				/* Maximal running time (in milliseconds) */
+    Tcl_WideInt threshold = 1;	/* Current threshold for check time (faster
+				 * repeat count without time check) */
+    Tcl_WideInt maxIterTm = 1;	/* Max time of some iteration as max threshold
+				 * additionally avoid divide to zero (never < 1) */
+    register Tcl_WideInt start, middle, stop;
+#ifndef TCL_WIDE_CLICKS
+    Tcl_Time now;
+#endif
+
+    static const char *const options[] = {
+	"-direct",	"-overhead",	"-calibrate",	"--",	NULL
+    };
+    enum options {
+	TMRT_EV_DIRECT,	TMRT_OVERHEAD,	TMRT_CALIBRATE,	TMRT_LAST
+    };
+
+    NRE_callback *rootPtr;
+    ByteCode	 *codePtr = NULL;
+
+    for (i = 1; i < objc - 1; i++) {
+    	int index;
+	if (Tcl_GetIndexFromObj(NULL, objv[i], options, "option", TCL_EXACT,
+		&index) != TCL_OK) {
+	    break;
+	}
+	if (index == TMRT_LAST) {
+	    i++;
+	    break;
+	}
+	switch (index) {
+	case TMRT_EV_DIRECT:
+	    direct = objv[i];
+	    break;
+	case TMRT_OVERHEAD:
+	    if (++i >= objc - 1) {
+		goto usage;
+	    }
+	    if (Tcl_GetDoubleFromObj(interp, objv[i], &overhead) != TCL_OK) {
+		return TCL_ERROR;
+	    }
+	    break;
+	case TMRT_CALIBRATE:
+	    calibrate = objv[i];
+	    break;
+	}
+    }
+
+    if (i >= objc || i < objc-2) {
+usage:
+	Tcl_WrongNumArgs(interp, 1, objv, "?-direct? ?-calibrate? ?-overhead double? command ?time?");
+	return TCL_ERROR;
+    }
+    objPtr = objv[i++];
+    if (i < objc) {
+	result = TclGetWideIntFromObj(interp, objv[i], &maxms);
+	if (result != TCL_OK) {
+	    return result;
+	}
+    }
+
+    /* if calibrate */
+    if (calibrate) {
+
+	/* if no time specified for the calibration */
+	if (maxms == -0x7FFFFFFFFFFFFFFFL) {
+	    Tcl_Obj *clobjv[6];
+	    Tcl_WideInt maxCalTime = 5000;
+	    double lastMeasureOverhead = measureOverhead;
+	    
+	    clobjv[0] = objv[0]; 
+	    i = 1;
+	    if (direct) {
+	    	clobjv[i++] = direct;
+	    }
+	    clobjv[i++] = objPtr; 
+
+	    /* reset last measurement overhead */
+	    measureOverhead = (double)0;
+
+	    /* self-call with 100 milliseconds to warm-up,
+	     * before entering the calibration cycle */
+	    TclNewLongObj(clobjv[i], 100);
+	    Tcl_IncrRefCount(clobjv[i]);
+	    result = Tcl_TimeRateObjCmd(dummy, interp, i+1, clobjv);
+	    Tcl_DecrRefCount(clobjv[i]);
+	    if (result != TCL_OK) {
+		return result;
+	    }
+
+	    i--;
+	    clobjv[i++] = calibrate;
+	    clobjv[i++] = objPtr; 
+
+	    /* set last measurement overhead to max */
+	    measureOverhead = (double)0x7FFFFFFFFFFFFFFFL;
+
+	    /* calibration cycle until it'll be preciser */
+	    maxms = -1000;
+	    do {
+		lastMeasureOverhead = measureOverhead;
+		TclNewLongObj(clobjv[i], (int)maxms);
+		Tcl_IncrRefCount(clobjv[i]);
+		result = Tcl_TimeRateObjCmd(dummy, interp, i+1, clobjv);
+		Tcl_DecrRefCount(clobjv[i]);
+		if (result != TCL_OK) {
+		    return result;
+		}
+		maxCalTime += maxms;
+		/* increase maxms for preciser calibration */
+		maxms -= (-maxms / 4);
+		/* as long as new value more as 0.05% better */
+	    } while ( (measureOverhead >= lastMeasureOverhead
+		    || measureOverhead / lastMeasureOverhead <= 0.9995)
+		    && maxCalTime > 0
+	    );
+
+	    return result;
+	}
+	if (maxms == 0) {
+	    /* reset last measurement overhead */
+	    measureOverhead = 0;
+	    Tcl_SetObjResult(interp, Tcl_NewLongObj(0));
+	    return TCL_OK;
+	}
+
+	/* if time is negative - make current overhead more precise */
+	if (maxms > 0) {
+	    /* set last measurement overhead to max */
+	    measureOverhead = (double)0x7FFFFFFFFFFFFFFFL;
+	} else {
+	    maxms = -maxms;
+	}
+
+    }
+
+    if (maxms == -0x7FFFFFFFFFFFFFFFL) {
+    	maxms = 1000;
+    }
+    if (overhead == -1) {
+	overhead = measureOverhead;
+    }
+
+    /* be sure that resetting of result will not smudge the further measurement */
+    Tcl_ResetResult(interp);
+
+    /* compile object */
+    if (!direct) {
+	if (TclInterpReady(interp) != TCL_OK) {
+	    return TCL_ERROR;
+	}
+	codePtr = TclCompileObj(interp, objPtr, NULL, 0);
+	TclPreserveByteCode(codePtr);
+    }
+
+    /* get start and stop time */
+#ifdef TCL_WIDE_CLICKS
+    start = middle = TclpGetWideClicks();
+    /* time to stop execution (in wide clicks) */
+    stop = start + (maxms * 1000 / TclpWideClickInMicrosec());
+#else
+    Tcl_GetTime(&now);
+    start = now.sec; start *= 1000000; start += now.usec;
+    middle = start;
+    /* time to stop execution (in microsecs) */
+    stop = start + maxms * 1000;
+#endif
+
+    /* start measurement */
+    while (1) {
+    	/* eval single iteration */
+    	count++;
+
+	if (!direct) {
+	    /* precompiled */
+	    rootPtr = TOP_CB(interp);
+	    result = TclNRExecuteByteCode(interp, codePtr);
+	    result = TclNRRunCallbacks(interp, result, rootPtr);
+	} else {
+	    /* eval */
+	    result = TclEvalObjEx(interp, objPtr, 0, NULL, 0);
+	}
+	if (result != TCL_OK) {
+	    goto done;
+	}
+	
+	/* don't check time up to threshold */
+	if (--threshold > 0) continue;
+
+	/* check stop time reached, estimate new threshold */
+    #ifdef TCL_WIDE_CLICKS
+	middle = TclpGetWideClicks();
+    #else
+	Tcl_GetTime(&now);
+	middle = now.sec; middle *= 1000000; middle += now.usec;
+    #endif
+	if (middle >= stop) {
+	    break;
+	}
+
+	/* don't calculate threshold by few iterations, because sometimes
+	 * first iteration(s) can be too fast (cached, delayed clean up, etc) */
+	if (count < 10) {
+	   threshold = 1; continue;
+	}
+
+	/* average iteration time in microsecs */
+	threshold = (middle - start) / count;
+	if (threshold > maxIterTm) {
+	    maxIterTm = threshold;
+	}
+	/* as relation between remaining time and time since last check */
+	threshold = ((stop - middle) / maxIterTm) / 4;
+	if (threshold > 100000) {	    /* fix for too large threshold */
+	    threshold = 100000;
+	}
+    }
+
+    {
+	Tcl_Obj *objarr[8], **objs = objarr;
+	Tcl_WideInt val;
+	const char *fmt;
+
+	middle -= start;		     /* execution time in microsecs */
+
+    #ifdef TCL_WIDE_CLICKS
+	/* convert execution time in wide clicks to microsecs */
+	middle *= TclpWideClickInMicrosec();
+    #endif
+
+	/* if not calibrate */
+	if (!calibrate) {
+	    /* minimize influence of measurement overhead */
+	    if (overhead > 0) {
+		/* estimate the time of overhead (microsecs) */
+		Tcl_WideInt curOverhead = overhead * count;
+		if (middle > curOverhead) {
+		    middle -= curOverhead;
+		} else {
+		    middle = 1;
+		}
+	    }
+	} else {
+	    /* calibration - obtaining new measurement overhead */
+	    if (measureOverhead > (double)middle / count) {
+		measureOverhead = (double)middle / count;
+	    }
+	    objs[0] = Tcl_NewDoubleObj(measureOverhead);
+	    TclNewLiteralStringObj(objs[1], "\xC2\xB5s/#-overhead"); /* mics */
+	    objs += 2;
+	}
+
+	val = middle / count;		     /* microsecs per iteration */
+	if (val >= 1000000) {
+	    objs[0] = Tcl_NewWideIntObj(val);
+	} else {
+	    if (val < 10)    { fmt = "%.6f"; } else
+	    if (val < 100)   { fmt = "%.4f"; } else
+	    if (val < 1000)  { fmt = "%.3f"; } else
+	    if (val < 10000) { fmt = "%.2f"; } else
+			     { fmt = "%.1f"; };
+	    objs[0] = Tcl_ObjPrintf(fmt, ((double)middle)/count);
+	}
+
+	objs[2] = Tcl_NewWideIntObj(count); /* iterations */
+	
+	/* calculate speed as rate (count) per sec */
+	if (!middle) middle++; /* +1 ms, just to avoid divide by zero */
+	if (count < (0x7FFFFFFFFFFFFFFFL / 1000000)) {
+	    val = (count * 1000000) / middle;
+	    if (val < 100000) {
+		if (val < 100)	{ fmt = "%.3f"; } else
+		if (val < 1000) { fmt = "%.2f"; } else
+				{ fmt = "%.1f"; };
+		objs[4] = Tcl_ObjPrintf(fmt, ((double)(count * 1000000)) / middle);
+	    } else {
+		objs[4] = Tcl_NewWideIntObj(val);
+	    }
+	} else {
+	    objs[4] = Tcl_NewWideIntObj((count / middle) * 1000000);
+	}
+
+	/* estimated net execution time (in millisecs) */
+	if (!calibrate) {
+	    objs[6] = Tcl_ObjPrintf("%.3f", (double)middle / 1000);
+	    TclNewLiteralStringObj(objs[7], "nett-ms");
+	}
+
+	/*
+	* Construct the result as a list because many programs have always parsed
+	* as such (extracting the first element, typically).
+	*/
+
+	TclNewLiteralStringObj(objs[1], "\xC2\xB5s/#"); /* mics/# */
+	TclNewLiteralStringObj(objs[3], "#");
+	TclNewLiteralStringObj(objs[5], "#/sec");
+	Tcl_SetObjResult(interp, Tcl_NewListObj(8, objarr));
+    }
+
+done:
+
+    if (codePtr != NULL) {
+	TclReleaseByteCode(codePtr);
+    }
+
+    return result;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * Tcl_TryObjCmd, TclNRTryObjCmd --
  *
  *	This procedure is invoked to process the "try" Tcl command. See the
diff --git a/generic/tclCompile.h b/generic/tclCompile.h
index c04fc0e..90edf07 100644
--- a/generic/tclCompile.h
+++ b/generic/tclCompile.h
@@ -1159,6 +1159,25 @@ MODULE_SCOPE void	TclPushVarName(Tcl_Interp *interp,
 			    Tcl_Token *varTokenPtr, CompileEnv *envPtr,
 			    int flags, int *localIndexPtr,
 			    int *isScalarPtr);
+
+static inline void
+TclPreserveByteCode(
+    register ByteCode *codePtr)
+{
+    codePtr->refCount++;
+}
+
+static inline void
+TclReleaseByteCode(
+    register ByteCode *codePtr)
+{
+    if (codePtr->refCount-- > 1) {
+	return;
+    }
+    /* Just dropped to refcount==0.  Clean up. */
+    TclCleanupByteCode(codePtr);
+}
+
 MODULE_SCOPE void	TclReleaseLiteral(Tcl_Interp *interp, Tcl_Obj *objPtr);
 MODULE_SCOPE void	TclInvalidateCmdLiteral(Tcl_Interp *interp,
 			    const char *name, Namespace *nsPtr);
diff --git a/generic/tclDate.c b/generic/tclDate.c
index e4dd000..64cb804 100644
--- a/generic/tclDate.c
+++ b/generic/tclDate.c
@@ -1,24 +1,22 @@
-/* A Bison parser, made by GNU Bison 2.3.  */
+/* A Bison parser, made by GNU Bison 2.4.2.  */
 
 /* Skeleton implementation for Bison's Yacc-like parsers in C
-
-   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
-   Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
+   
+      Copyright (C) 1984, 1989-1990, 2000-2006, 2009-2010 Free Software
+   Foundation, Inc.
+   
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
-
+   
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* As a special exception, you may create a larger work that contains
    part or all of the Bison parser skeleton and distribute that work
@@ -29,7 +27,7 @@
    special exception, which will cause the skeleton and the resulting
    Bison output files to be licensed under the GNU General Public
    License without this special exception.
-
+   
    This special exception was added by the Free Software Foundation in
    version 2.2 of Bison.  */
 
@@ -47,7 +45,7 @@
 #define YYBISON 1
 
 /* Bison version.  */
-#define YYBISON_VERSION "2.3"
+#define YYBISON_VERSION "2.4.2"
 
 /* Skeleton name.  */
 #define YYSKELETON_NAME "yacc.c"
@@ -55,65 +53,24 @@
 /* Pure parsers.  */
 #define YYPURE 1
 
+/* Push parsers.  */
+#define YYPUSH 0
+
+/* Pull parsers.  */
+#define YYPULL 1
+
 /* Using locations.  */
 #define YYLSP_NEEDED 1
 
 /* Substitute the variable and function names.  */
-#define yyparse TclDateparse
-#define yylex   TclDatelex
-#define yyerror TclDateerror
-#define yylval  TclDatelval
-#define yychar  TclDatechar
-#define yydebug TclDatedebug
-#define yynerrs TclDatenerrs
-#define yylloc TclDatelloc
-
-/* Tokens.  */
-#ifndef YYTOKENTYPE
-# define YYTOKENTYPE
-   /* Put the tokens into the symbol table, so that GDB and other debuggers
-      know about them.  */
-   enum yytokentype {
-     tAGO = 258,
-     tDAY = 259,
-     tDAYZONE = 260,
-     tID = 261,
-     tMERIDIAN = 262,
-     tMONTH = 263,
-     tMONTH_UNIT = 264,
-     tSTARDATE = 265,
-     tSEC_UNIT = 266,
-     tSNUMBER = 267,
-     tUNUMBER = 268,
-     tZONE = 269,
-     tEPOCH = 270,
-     tDST = 271,
-     tISOBASE = 272,
-     tDAY_UNIT = 273,
-     tNEXT = 274
-   };
-#endif
-/* Tokens.  */
-#define tAGO 258
-#define tDAY 259
-#define tDAYZONE 260
-#define tID 261
-#define tMERIDIAN 262
-#define tMONTH 263
-#define tMONTH_UNIT 264
-#define tSTARDATE 265
-#define tSEC_UNIT 266
-#define tSNUMBER 267
-#define tUNUMBER 268
-#define tZONE 269
-#define tEPOCH 270
-#define tDST 271
-#define tISOBASE 272
-#define tDAY_UNIT 273
-#define tNEXT 274
-
-
-
+#define yyparse         TclDateparse
+#define yylex           TclDatelex
+#define yyerror         TclDateerror
+#define yylval          TclDatelval
+#define yychar          TclDatechar
+#define yydebug         TclDatedebug
+#define yynerrs         TclDatenerrs
+#define yylloc          TclDatelloc
 
 /* Copy the first part of user declarations.  */
 
@@ -129,6 +86,7 @@
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
  */
 #include "tclInt.h"
 
@@ -146,73 +104,11 @@
  * parsed fields will be returned.
  */
 
-typedef struct DateInfo {
-
-    Tcl_Obj* messages;		/* Error messages */
-    const char* separatrix;	/* String separating messages */
-
-    time_t dateYear;
-    time_t dateMonth;
-    time_t dateDay;
-    int dateHaveDate;
-
-    time_t dateHour;
-    time_t dateMinutes;
-    time_t dateSeconds;
-    int dateMeridian;
-    int dateHaveTime;
-
-    time_t dateTimezone;
-    int dateDSTmode;
-    int dateHaveZone;
-
-    time_t dateRelMonth;
-    time_t dateRelDay;
-    time_t dateRelSeconds;
-    int dateHaveRel;
-
-    time_t dateMonthOrdinal;
-    int dateHaveOrdinalMonth;
-
-    time_t dateDayOrdinal;
-    time_t dateDayNumber;
-    int dateHaveDay;
-
-    const char *dateStart;
-    const char *dateInput;
-    time_t *dateRelPointer;
-
-    int dateDigitCount;
-} DateInfo;
+#include "tclDate.h"
 
 #define YYMALLOC	ckalloc
 #define YYFREE(x)	(ckfree((void*) (x)))
 
-#define yyDSTmode	(info->dateDSTmode)
-#define yyDayOrdinal	(info->dateDayOrdinal)
-#define yyDayNumber	(info->dateDayNumber)
-#define yyMonthOrdinal	(info->dateMonthOrdinal)
-#define yyHaveDate	(info->dateHaveDate)
-#define yyHaveDay	(info->dateHaveDay)
-#define yyHaveOrdinalMonth (info->dateHaveOrdinalMonth)
-#define yyHaveRel	(info->dateHaveRel)
-#define yyHaveTime	(info->dateHaveTime)
-#define yyHaveZone	(info->dateHaveZone)
-#define yyTimezone	(info->dateTimezone)
-#define yyDay		(info->dateDay)
-#define yyMonth		(info->dateMonth)
-#define yyYear		(info->dateYear)
-#define yyHour		(info->dateHour)
-#define yyMinutes	(info->dateMinutes)
-#define yySeconds	(info->dateSeconds)
-#define yyMeridian	(info->dateMeridian)
-#define yyRelMonth	(info->dateRelMonth)
-#define yyRelDay	(info->dateRelDay)
-#define yyRelSeconds	(info->dateRelSeconds)
-#define yyRelPointer	(info->dateRelPointer)
-#define yyInput		(info->dateInput)
-#define yyDigitCount	(info->dateDigitCount)
-
 #define EPOCH		1970
 #define START_OF_TIME	1902
 #define END_OF_TIME	2037
@@ -246,13 +142,6 @@ typedef enum _DSTMODE {
     DSTon, DSToff, DSTmaybe
 } DSTMODE;
 
-/*
- * Meridian: am, pm, or 24-hour style.
- */
-
-typedef enum _MERIDIAN {
-    MERam, MERpm, MER24
-} MERIDIAN;
 
 
 
@@ -274,19 +163,49 @@ typedef enum _MERIDIAN {
 # define YYTOKEN_TABLE 0
 #endif
 
+
+/* Tokens.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+   /* Put the tokens into the symbol table, so that GDB and other debuggers
+      know about them.  */
+   enum yytokentype {
+     tAGO = 258,
+     tDAY = 259,
+     tDAYZONE = 260,
+     tID = 261,
+     tMERIDIAN = 262,
+     tMONTH = 263,
+     tMONTH_UNIT = 264,
+     tSTARDATE = 265,
+     tSEC_UNIT = 266,
+     tSNUMBER = 267,
+     tUNUMBER = 268,
+     tZONE = 269,
+     tEPOCH = 270,
+     tDST = 271,
+     tISOBASE = 272,
+     tDAY_UNIT = 273,
+     tNEXT = 274
+   };
+#endif
+
+
+
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 typedef union YYSTYPE
-
 {
+
+
     time_t Number;
     enum _MERIDIAN Meridian;
-}
-/* Line 187 of yacc.c.  */
 
-	YYSTYPE;
+
+
+} YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
 #endif
 
 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
@@ -316,14 +235,10 @@ static int		LookupWord(YYSTYPE* yylvalPtr, char *buff);
 				     DateInfo* info, const char *s);
  static int		TclDatelex(YYSTYPE* yylvalPtr, YYLTYPE* location,
 				   DateInfo* info);
-static time_t		ToSeconds(time_t Hours, time_t Minutes,
-			    time_t Seconds, MERIDIAN Meridian);
 MODULE_SCOPE int	yyparse(DateInfo*);
 
 
 
-/* Line 216 of yacc.c.  */
-
 
 #ifdef short
 # undef short
@@ -359,15 +274,21 @@ typedef short int yytype_int16;
 #ifndef YYSIZE_T
 # ifdef __SIZE_TYPE__
 #  define YYSIZE_T __SIZE_TYPE__
-# else
+# elif defined size_t
+#  define YYSIZE_T size_t
+# elif ! defined YYSIZE_T && (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+#  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
 #  define YYSIZE_T size_t
+# else
+#  define YYSIZE_T unsigned int
 # endif
 #endif
 
 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
 
 #ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
@@ -392,14 +313,14 @@ typedef short int yytype_int16;
 #if (defined __STDC__ || defined __C99__FUNC__ \
      || defined __cplusplus || defined _MSC_VER)
 static int
-YYID (int i)
+YYID (int yyi)
 #else
 static int
-YYID (i)
-    int i;
+YYID (yyi)
+    int yyi;
 #endif
 {
-  return i;
+  return yyi;
 }
 #endif
 
@@ -481,9 +402,9 @@ void free (void *); /* INFRINGES ON USER NAME SPACE */
 /* A type that is properly aligned for any stack member.  */
 union yyalloc
 {
-  yytype_int16 yyss;
-  YYSTYPE yyvs;
-    YYLTYPE yyls;
+  yytype_int16 yyss_alloc;
+  YYSTYPE yyvs_alloc;
+  YYLTYPE yyls_alloc;
 };
 
 /* The size of the maximum gap between one aligned stack and the next.  */
@@ -518,12 +439,12 @@ union yyalloc
    elements in the stack, and YYPTR gives the new location of the
    stack.  Advance YYPTR to a properly aligned location for the next
    stack.  */
-# define YYSTACK_RELOCATE(Stack)					\
+# define YYSTACK_RELOCATE(Stack_alloc, Stack)				\
     do									\
       {									\
 	YYSIZE_T yynewbytes;						\
-	YYCOPY (&yyptr->Stack, Stack, yysize);				\
-	Stack = &yyptr->Stack;						\
+	YYCOPY (&yyptr->Stack_alloc, Stack, yysize);			\
+	Stack = &yyptr->Stack_alloc;					\
 	yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
 	yyptr += yynewbytes / sizeof (*yyptr);				\
       }									\
@@ -624,12 +545,12 @@ static const yytype_int8 yyrhs[] =
 /* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
 static const yytype_uint16 yyrline[] =
 {
-       0,   225,   225,   226,   229,   232,   235,   238,   241,   244,
-     247,   251,   256,   259,   265,   271,   279,   285,   296,   300,
-     304,   310,   314,   318,   322,   326,   332,   336,   341,   346,
-     351,   356,   360,   365,   369,   374,   381,   385,   391,   400,
-     409,   419,   433,   438,   441,   444,   447,   450,   453,   458,
-     461,   466,   470,   474,   480,   498,   501
+       0,   152,   152,   153,   156,   159,   162,   165,   168,   171,
+     174,   178,   183,   186,   192,   198,   206,   212,   223,   227,
+     231,   237,   241,   245,   249,   253,   259,   263,   268,   273,
+     278,   283,   287,   292,   296,   301,   308,   312,   318,   327,
+     336,   346,   360,   365,   368,   371,   374,   377,   380,   385,
+     388,   393,   397,   401,   407,   425,   428
 };
 #endif
 
@@ -783,9 +704,18 @@ static const yytype_uint8 yystos[] =
 
 /* Like YYERROR except do call yyerror.  This remains here temporarily
    to ease the transition to the new meaning of YYERROR, for GCC.
-   Once GCC version 2 has supplanted version 1, this can go.  */
+   Once GCC version 2 has supplanted version 1, this can go.  However,
+   YYFAIL appears to be in use.  Nevertheless, it is formally deprecated
+   in Bison 2.4.2's NEWS entry, where a plan to phase it out is
+   discussed.  */
 
 #define YYFAIL		goto yyerrlab
+#if defined YYFAIL
+  /* This is here to suppress warnings from the GCC cpp's
+     -Wunused-macros.  Normally we don't worry about that warning, but
+     some users do, and we want to make it easy for users to remove
+     YYFAIL uses, which will produce warnings from Bison 2.5.  */
+#endif
 
 #define YYRECOVERING()  (!!yyerrstatus)
 
@@ -842,7 +772,7 @@ while (YYID (0))
    we won't break user code: when these are the locations we know.  */
 
 #ifndef YY_LOCATION_PRINT
-# if YYLTYPE_IS_TRIVIAL
+# if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
 #  define YY_LOCATION_PRINT(File, Loc)			\
      fprintf (File, "%d.%d-%d.%d",			\
 	      (Loc).first_line, (Loc).first_column,	\
@@ -961,17 +891,20 @@ yy_symbol_print (yyoutput, yytype, yyvaluep, yylocationp, info)
 #if (defined __STDC__ || defined __C99__FUNC__ \
      || defined __cplusplus || defined _MSC_VER)
 static void
-yy_stack_print (yytype_int16 *bottom, yytype_int16 *top)
+yy_stack_print (yytype_int16 *yybottom, yytype_int16 *yytop)
 #else
 static void
-yy_stack_print (bottom, top)
-    yytype_int16 *bottom;
-    yytype_int16 *top;
+yy_stack_print (yybottom, yytop)
+    yytype_int16 *yybottom;
+    yytype_int16 *yytop;
 #endif
 {
   YYFPRINTF (stderr, "Stack now");
-  for (; bottom <= top; ++bottom)
-    YYFPRINTF (stderr, " %d", *bottom);
+  for (; yybottom <= yytop; yybottom++)
+    {
+      int yybot = *yybottom;
+      YYFPRINTF (stderr, " %d", yybot);
+    }
   YYFPRINTF (stderr, "\n");
 }
 
@@ -1007,11 +940,11 @@ yy_reduce_print (yyvsp, yylsp, yyrule, info)
   /* The symbols being reduced.  */
   for (yyi = 0; yyi < yynrhs; yyi++)
     {
-      fprintf (stderr, "   $%d = ", yyi + 1);
+      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
       yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
 		       &(yyvsp[(yyi + 1) - (yynrhs)])
 		       , &(yylsp[(yyi + 1) - (yynrhs)])		       , info);
-      fprintf (stderr, "\n");
+      YYFPRINTF (stderr, "\n");
     }
 }
 
@@ -1295,10 +1228,8 @@ yydestruct (yymsg, yytype, yyvaluep, yylocationp, info)
 	break;
     }
 }
-
 
 /* Prevent warnings from -Wmissing-prototypes.  */
-
 #ifdef YYPARSE_PARAM
 #if defined __STDC__ || defined __cplusplus
 int yyparse (void *YYPARSE_PARAM);
@@ -1317,10 +1248,9 @@ int yyparse ();
 
 
 
-
-/*----------.
-| yyparse.  |
-`----------*/
+/*-------------------------.
+| yyparse or yypush_parse.  |
+`-------------------------*/
 
 #ifdef YYPARSE_PARAM
 #if (defined __STDC__ || defined __C99__FUNC__ \
@@ -1344,88 +1274,97 @@ yyparse (info)
 #endif
 #endif
 {
-  /* The look-ahead symbol.  */
+/* The lookahead symbol.  */
 int yychar;
 
-/* The semantic value of the look-ahead symbol.  */
+/* The semantic value of the lookahead symbol.  */
 YYSTYPE yylval;
 
-/* Number of syntax errors so far.  */
-int yynerrs;
-/* Location data for the look-ahead symbol.  */
+/* Location data for the lookahead symbol.  */
 YYLTYPE yylloc;
 
-  int yystate;
-  int yyn;
-  int yyresult;
-  /* Number of tokens to shift before error messages enabled.  */
-  int yyerrstatus;
-  /* Look-ahead token as an internal (translated) token number.  */
-  int yytoken = 0;
-#if YYERROR_VERBOSE
-  /* Buffer for error messages, and its allocated size.  */
-  char yymsgbuf[128];
-  char *yymsg = yymsgbuf;
-  YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
-#endif
+    /* Number of syntax errors so far.  */
+    int yynerrs;
 
-  /* Three stacks and their tools:
-     `yyss': related to states,
-     `yyvs': related to semantic values,
-     `yyls': related to locations.
+    int yystate;
+    /* Number of tokens to shift before error messages enabled.  */
+    int yyerrstatus;
 
-     Refer to the stacks thru separate pointers, to allow yyoverflow
-     to reallocate them elsewhere.  */
+    /* The stacks and their tools:
+       `yyss': related to states.
+       `yyvs': related to semantic values.
+       `yyls': related to locations.
 
-  /* The state stack.  */
-  yytype_int16 yyssa[YYINITDEPTH];
-  yytype_int16 *yyss = yyssa;
-  yytype_int16 *yyssp;
+       Refer to the stacks thru separate pointers, to allow yyoverflow
+       to reallocate them elsewhere.  */
 
-  /* The semantic value stack.  */
-  YYSTYPE yyvsa[YYINITDEPTH];
-  YYSTYPE *yyvs = yyvsa;
-  YYSTYPE *yyvsp;
+    /* The state stack.  */
+    yytype_int16 yyssa[YYINITDEPTH];
+    yytype_int16 *yyss;
+    yytype_int16 *yyssp;
 
-  /* The location stack.  */
-  YYLTYPE yylsa[YYINITDEPTH];
-  YYLTYPE *yyls = yylsa;
-  YYLTYPE *yylsp;
-  /* The locations where the error started and ended.  */
-  YYLTYPE yyerror_range[2];
+    /* The semantic value stack.  */
+    YYSTYPE yyvsa[YYINITDEPTH];
+    YYSTYPE *yyvs;
+    YYSTYPE *yyvsp;
 
-#define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N), yylsp -= (N))
+    /* The location stack.  */
+    YYLTYPE yylsa[YYINITDEPTH];
+    YYLTYPE *yyls;
+    YYLTYPE *yylsp;
 
-  YYSIZE_T yystacksize = YYINITDEPTH;
+    /* The locations where the error started and ended.  */
+    YYLTYPE yyerror_range[2];
 
+    YYSIZE_T yystacksize;
+
+  int yyn;
+  int yyresult;
+  /* Lookahead token as an internal (translated) token number.  */
+  int yytoken;
   /* The variables used to return semantic value and location from the
      action routines.  */
   YYSTYPE yyval;
   YYLTYPE yyloc;
 
+#if YYERROR_VERBOSE
+  /* Buffer for error messages, and its allocated size.  */
+  char yymsgbuf[128];
+  char *yymsg = yymsgbuf;
+  YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
+#endif
+
+#define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N), yylsp -= (N))
+
   /* The number of symbols on the RHS of the reduced rule.
      Keep to zero when no symbol should be popped.  */
   int yylen = 0;
 
+  yytoken = 0;
+  yyss = yyssa;
+  yyvs = yyvsa;
+  yyls = yylsa;
+  yystacksize = YYINITDEPTH;
+
   YYDPRINTF ((stderr, "Starting parse\n"));
 
   yystate = 0;
   yyerrstatus = 0;
   yynerrs = 0;
-  yychar = YYEMPTY;		/* Cause a token to be read.  */
+  yychar = YYEMPTY; /* Cause a token to be read.  */
 
   /* Initialize stack pointers.
      Waste one element of value and location stack
      so that they stay on the same level as the state stack.
      The wasted elements are never initialized.  */
-
   yyssp = yyss;
   yyvsp = yyvs;
   yylsp = yyls;
-#if YYLTYPE_IS_TRIVIAL
+
+#if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
   /* Initialize the default location before parsing starts.  */
   yylloc.first_line   = yylloc.last_line   = 1;
-  yylloc.first_column = yylloc.last_column = 0;
+  yylloc.first_column = yylloc.last_column = 1;
 #endif
 
   goto yysetstate;
@@ -1464,6 +1403,7 @@ YYLTYPE yylloc;
 		    &yyvs1, yysize * sizeof (*yyvsp),
 		    &yyls1, yysize * sizeof (*yylsp),
 		    &yystacksize);
+
 	yyls = yyls1;
 	yyss = yyss1;
 	yyvs = yyvs1;
@@ -1485,9 +1425,9 @@ YYLTYPE yylloc;
 	  (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
 	if (! yyptr)
 	  goto yyexhaustedlab;
-	YYSTACK_RELOCATE (yyss);
-	YYSTACK_RELOCATE (yyvs);
-	YYSTACK_RELOCATE (yyls);
+	YYSTACK_RELOCATE (yyss_alloc, yyss);
+	YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+	YYSTACK_RELOCATE (yyls_alloc, yyls);
 #  undef YYSTACK_RELOCATE
 	if (yyss1 != yyssa)
 	  YYSTACK_FREE (yyss1);
@@ -1508,6 +1448,9 @@ YYLTYPE yylloc;
 
   YYDPRINTF ((stderr, "Entering state %d\n", yystate));
 
+  if (yystate == YYFINAL)
+    YYACCEPT;
+
   goto yybackup;
 
 /*-----------.
@@ -1516,16 +1459,16 @@ YYLTYPE yylloc;
 yybackup:
 
   /* Do appropriate processing given the current state.  Read a
-     look-ahead token if we need one and don't already have one.  */
+     lookahead token if we need one and don't already have one.  */
 
-  /* First try to decide what to do without reference to look-ahead token.  */
+  /* First try to decide what to do without reference to lookahead token.  */
   yyn = yypact[yystate];
   if (yyn == YYPACT_NINF)
     goto yydefault;
 
-  /* Not known => get a look-ahead token if don't already have one.  */
+  /* Not known => get a lookahead token if don't already have one.  */
 
-  /* YYCHAR is either YYEMPTY or YYEOF or a valid look-ahead symbol.  */
+  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
   if (yychar == YYEMPTY)
     {
       YYDPRINTF ((stderr, "Reading a token: "));
@@ -1557,20 +1500,16 @@ yybackup:
       goto yyreduce;
     }
 
-  if (yyn == YYFINAL)
-    YYACCEPT;
-
   /* Count tokens shifted since error; after three, turn off error
      status.  */
   if (yyerrstatus)
     yyerrstatus--;
 
-  /* Shift the look-ahead token.  */
+  /* Shift the lookahead token.  */
   YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
 
-  /* Discard the shifted token unless it is eof.  */
-  if (yychar != YYEOF)
-    yychar = YYEMPTY;
+  /* Discard the shifted token.  */
+  yychar = YYEMPTY;
 
   yystate = yyn;
   *++yyvsp = yylval;
@@ -1878,16 +1817,16 @@ yyreduce:
   case 36:
 
     {
-	    yyMonthOrdinal = 1;
-	    yyMonth = (yyvsp[(2) - (2)].Number);
+	    yyMonthOrdinalIncr = 1;
+	    yyMonthOrdinal = (yyvsp[(2) - (2)].Number);
 	;}
     break;
 
   case 37:
 
     {
-	    yyMonthOrdinal = (yyvsp[(2) - (3)].Number);
-	    yyMonth = (yyvsp[(3) - (3)].Number);
+	    yyMonthOrdinalIncr = (yyvsp[(2) - (3)].Number);
+	    yyMonthOrdinal = (yyvsp[(3) - (3)].Number);
 	;}
     break;
 
@@ -2062,7 +2001,6 @@ yyreduce:
     break;
 
 
-/* Line 1267 of yacc.c.  */
 
       default: break;
     }
@@ -2139,7 +2077,7 @@ yyerrlab:
 
   if (yyerrstatus == 3)
     {
-      /* If just tried and failed to reuse look-ahead token after an
+      /* If just tried and failed to reuse lookahead token after an
 	 error, discard it.  */
 
       if (yychar <= YYEOF)
@@ -2156,7 +2094,7 @@ yyerrlab:
 	}
     }
 
-  /* Else will try to reuse look-ahead token after shifting the error
+  /* Else will try to reuse lookahead token after shifting the error
      token.  */
   goto yyerrlab1;
 
@@ -2214,14 +2152,11 @@ yyerrlab1:
       YY_STACK_PRINT (yyss, yyssp);
     }
 
-  if (yyn == YYFINAL)
-    YYACCEPT;
-
   *++yyvsp = yylval;
 
   yyerror_range[1] = yylloc;
   /* Using YYLLOC is tempting, but would change the location of
-     the look-ahead.  YYLOC is available though.  */
+     the lookahead.  YYLOC is available though.  */
   YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
   *++yylsp = yyloc;
 
@@ -2246,7 +2181,7 @@ yyabortlab:
   yyresult = 1;
   goto yyreturn;
 
-#ifndef yyoverflow
+#if !defined(yyoverflow) || YYERROR_VERBOSE
 /*-------------------------------------------------.
 | yyexhaustedlab -- memory exhaustion comes here.  |
 `-------------------------------------------------*/
@@ -2257,7 +2192,7 @@ yyexhaustedlab:
 #endif
 
 yyreturn:
-  if (yychar != YYEOF && yychar != YYEMPTY)
+  if (yychar != YYEMPTY)
      yydestruct ("Cleanup: discarding lookahead",
 		 yytoken, &yylval, &yylloc, info);
   /* Do not reclaim the symbols of the rule which action triggered
@@ -2513,11 +2448,11 @@ TclDateerror(
     infoPtr->separatrix = "\n";
 }
 
-static time_t
+MODULE_SCOPE int
 ToSeconds(
-    time_t Hours,
-    time_t Minutes,
-    time_t Seconds,
+    int Hours,
+    int Minutes,
+    int Seconds,
     MERIDIAN Meridian)
 {
     if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59) {
@@ -2680,7 +2615,7 @@ TclDatelex(
 
     location->first_column = yyInput - info->dateStart;
     for ( ; ; ) {
-	while (TclIsSpaceProc(*yyInput)) {
+	while (isspace(UCHAR(*yyInput))) {
 	    yyInput++;
 	}
 
@@ -2740,65 +2675,36 @@ TclDatelex(
 	} while (Count > 0);
     }
 }
-
+
 int
-TclClockOldscanObjCmd(
-    ClientData clientData,	/* Unused */
+TclClockFreeScan(
     Tcl_Interp *interp,		/* Tcl interpreter */
-    int objc,			/* Count of paraneters */
-    Tcl_Obj *const *objv)	/* Parameters */
+    DateInfo *info)		/* Input and result parameters */
 {
-    Tcl_Obj *result, *resultElement;
-    int yr, mo, da;
-    DateInfo dateInfo;
-    DateInfo* info = &dateInfo;
     int status;
 
-    if (objc != 5) {
-	Tcl_WrongNumArgs(interp, 1, objv,
-		"stringToParse baseYear baseMonth baseDay" );
-	return TCL_ERROR;
-    }
-
-    yyInput = Tcl_GetString( objv[1] );
-    dateInfo.dateStart = yyInput;
-
-    yyHaveDate = 0;
-    if (Tcl_GetIntFromObj(interp, objv[2], &yr) != TCL_OK
-	    || Tcl_GetIntFromObj(interp, objv[3], &mo) != TCL_OK
-	    || Tcl_GetIntFromObj(interp, objv[4], &da) != TCL_OK) {
-	return TCL_ERROR;
-    }
-    yyYear = yr; yyMonth = mo; yyDay = da;
-
-    yyHaveTime = 0;
-    yyHour = 0; yyMinutes = 0; yySeconds = 0; yyMeridian = MER24;
-
-    yyHaveZone = 0;
-    yyTimezone = 0; yyDSTmode = DSTmaybe;
-
-    yyHaveOrdinalMonth = 0;
-    yyMonthOrdinal = 0;
-
-    yyHaveDay = 0;
-    yyDayOrdinal = 0; yyDayNumber = 0;
+    /*
+     * yyInput = stringToParse;
+     * 
+     * ClockInitDateInfo(info) should be executed to pre-init info;
+     */
 
-    yyHaveRel = 0;
-    yyRelMonth = 0; yyRelDay = 0; yyRelSeconds = 0; yyRelPointer = NULL;
+    yyDSTmode = DSTmaybe;
 
-    dateInfo.messages = Tcl_NewObj();
-    dateInfo.separatrix = "";
-    Tcl_IncrRefCount(dateInfo.messages);
+    info->messages = Tcl_NewObj();
+    info->separatrix = "";
+    Tcl_IncrRefCount(info->messages);
 
-    status = yyparse(&dateInfo);
+    info->dateStart = yyInput;
+    status = yyparse(info);
     if (status == 1) {
-	Tcl_SetObjResult(interp, dateInfo.messages);
-	Tcl_DecrRefCount(dateInfo.messages);
+	Tcl_SetObjResult(interp, info->messages);
+	Tcl_DecrRefCount(info->messages);
 	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "PARSE", NULL);
 	return TCL_ERROR;
     } else if (status == 2) {
 	Tcl_SetObjResult(interp, Tcl_NewStringObj("memory exhausted", -1));
-	Tcl_DecrRefCount(dateInfo.messages);
+	Tcl_DecrRefCount(info->messages);
 	Tcl_SetErrorCode(interp, "TCL", "MEMORY", NULL);
 	return TCL_ERROR;
     } else if (status != 0) {
@@ -2806,11 +2712,11 @@ TclClockOldscanObjCmd(
 						  "from date parser. Please "
 						  "report this error as a "
 						  "bug in Tcl.", -1));
-	Tcl_DecrRefCount(dateInfo.messages);
+	Tcl_DecrRefCount(info->messages);
 	Tcl_SetErrorCode(interp, "TCL", "BUG", NULL);
 	return TCL_ERROR;
     }
-    Tcl_DecrRefCount(dateInfo.messages);
+    Tcl_DecrRefCount(info->messages);
 
     if (yyHaveDate > 1) {
 	Tcl_SetObjResult(interp,
@@ -2843,6 +2749,40 @@ TclClockOldscanObjCmd(
 	return TCL_ERROR;
     }
 
+    return TCL_OK;
+}
+
+int
+TclClockOldscanObjCmd(
+    ClientData clientData,	/* Unused */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    int objc,			/* Count of paraneters */
+    Tcl_Obj *const *objv)	/* Parameters */
+{
+    Tcl_Obj *result, *resultElement;
+    int yr, mo, da;
+    DateInfo dateInfo;
+    DateInfo* info = &dateInfo;
+
+    if (objc != 5) {
+	Tcl_WrongNumArgs(interp, 1, objv,
+		"stringToParse baseYear baseMonth baseDay" );
+	return TCL_ERROR;
+    }
+
+    yyInput = Tcl_GetString( objv[1] );
+
+    if (Tcl_GetIntFromObj(interp, objv[2], &yr) != TCL_OK
+	    || Tcl_GetIntFromObj(interp, objv[3], &mo) != TCL_OK
+	    || Tcl_GetIntFromObj(interp, objv[4], &da) != TCL_OK) {
+	return TCL_ERROR;
+    }
+    yyYear = yr; yyMonth = mo; yyDay = da;
+
+    if (TclClockFreeScan(interp, info) != TCL_OK) {
+    	return TCL_ERROR;
+    }
+
     result = Tcl_NewObj();
     resultElement = Tcl_NewObj();
     if (yyHaveDate) {
@@ -2894,9 +2834,9 @@ TclClockOldscanObjCmd(
     resultElement = Tcl_NewObj();
     if (yyHaveOrdinalMonth) {
 	Tcl_ListObjAppendElement(interp, resultElement,
-		Tcl_NewIntObj((int) yyMonthOrdinal));
+		Tcl_NewIntObj((int) yyMonthOrdinalIncr));
 	Tcl_ListObjAppendElement(interp, resultElement,
-		Tcl_NewIntObj((int) yyMonth));
+		Tcl_NewIntObj((int) yyMonthOrdinal));
     }
     Tcl_ListObjAppendElement(interp, result, resultElement);
 
diff --git a/generic/tclDate.h b/generic/tclDate.h
new file mode 100644
index 0000000..e614f9d
--- /dev/null
+++ b/generic/tclDate.h
@@ -0,0 +1,512 @@
+/*
+ * tclDate.h --
+ *
+ *	This header file handles common usage of clock primitives
+ *	between tclDate.c (yacc), tclClock.c and tclClockFmt.c.
+ *
+ * Copyright (c) 2014 Serg G. Brester (aka sebres)
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _TCLCLOCK_H
+#define _TCLCLOCK_H
+
+/*
+ * Constants
+ */
+
+#define JULIAN_DAY_POSIX_EPOCH		2440588
+#define GREGORIAN_CHANGE_DATE		2361222
+#define SECONDS_PER_DAY			86400
+#define JULIAN_SEC_POSIX_EPOCH	      (((Tcl_WideInt) JULIAN_DAY_POSIX_EPOCH) \
+					* SECONDS_PER_DAY)
+#define FOUR_CENTURIES			146097	/* days */
+#define JDAY_1_JAN_1_CE_JULIAN		1721424
+#define JDAY_1_JAN_1_CE_GREGORIAN	1721426
+#define ONE_CENTURY_GREGORIAN		36524	/* days */
+#define FOUR_YEARS			1461	/* days */
+#define ONE_YEAR			365	/* days */
+
+#define RODDENBERRY			1946	/* Another epoch (Hi, Jeff!) */
+
+
+#define CLF_OPTIONAL	       (1 << 0) /* token is non mandatory */
+#define CLF_POSIXSEC	       (1 << 1)
+#define CLF_LOCALSEC	       (1 << 2)
+#define CLF_JULIANDAY	       (1 << 3)
+#define CLF_TIME	       (1 << 4)
+#define CLF_CENTURY	       (1 << 6)
+#define CLF_DAYOFMONTH	       (1 << 7)
+#define CLF_DAYOFYEAR	       (1 << 8)
+#define CLF_MONTH	       (1 << 9)
+#define CLF_YEAR	       (1 << 10)
+#define CLF_ISO8601YEAR	       (1 << 12)
+#define CLF_ISO8601	       (1 << 13)
+#define CLF_ISO8601CENTURY     (1 << 14)
+#define CLF_SIGNED	       (1 << 15)
+/* On demand (lazy) assemble flags */
+#define CLF_ASSEMBLE_DATE      (1 << 28) /* assemble year, month, etc. using julianDay */
+#define CLF_ASSEMBLE_JULIANDAY (1 << 29) /* assemble julianDay using year, month, etc. */
+#define CLF_ASSEMBLE_SECONDS   (1 << 30) /* assemble localSeconds (and seconds at end) */
+
+#define CLF_DATE	       (CLF_JULIANDAY | CLF_DAYOFMONTH | CLF_DAYOFYEAR | \
+				CLF_MONTH | CLF_YEAR | CLF_ISO8601YEAR | CLF_ISO8601)
+
+/*
+ * Enumeration of the string literals used in [clock]
+ */
+
+typedef enum ClockLiteral {
+    LIT__NIL,
+    LIT__DEFAULT_FORMAT,
+    LIT_SYSTEM,		LIT_CURRENT,		LIT_C,
+    LIT_BCE,		LIT_CE,
+    LIT_DAYOFMONTH,	LIT_DAYOFWEEK,		LIT_DAYOFYEAR,
+    LIT_ERA,		LIT_GMT,		LIT_GREGORIAN,
+    LIT_INTEGER_VALUE_TOO_LARGE,
+    LIT_ISO8601WEEK,	LIT_ISO8601YEAR,
+    LIT_JULIANDAY,	LIT_LOCALSECONDS,
+    LIT_MONTH,
+    LIT_SECONDS,	LIT_TZNAME,		LIT_TZOFFSET,
+    LIT_YEAR,
+    LIT_TZDATA,
+    LIT_GETSYSTEMTIMEZONE,
+    LIT_SETUPTIMEZONE,
+    LIT_MCGET,
+    LIT_GETSYSTEMLOCALE, LIT_GETCURRENTLOCALE,
+    LIT_LOCALIZE_FORMAT,
+    LIT__END
+} ClockLiteral;
+
+#define CLOCK_LITERAL_ARRAY(litarr) static const char *const litarr[] = { \
+    "", \
+    "%a %b %d %H:%M:%S %Z %Y", \
+    "system",		"current",		"C", \
+    "BCE",		"CE", \
+    "dayOfMonth",	"dayOfWeek",		"dayOfYear", \
+    "era",		":GMT",			"gregorian", \
+    "integer value too large to represent", \
+    "iso8601Week",	"iso8601Year", \
+    "julianDay",	"localSeconds", \
+    "month", \
+    "seconds",		"tzName",		"tzOffset", \
+    "year", \
+    "::tcl::clock::TZData", \
+    "::tcl::clock::GetSystemTimeZone", \
+    "::tcl::clock::SetupTimeZone", \
+    "::tcl::clock::mcget", \
+    "::tcl::clock::GetSystemLocale", "::tcl::clock::mclocale", \
+    "::tcl::clock::LocalizeFormat" \
+}
+
+/*
+ * Enumeration of the msgcat literals used in [clock]
+ */
+
+typedef enum ClockMsgCtLiteral {
+    MCLIT__NIL, /* placeholder */
+    MCLIT_MONTHS_FULL,	MCLIT_MONTHS_ABBREV,  MCLIT_MONTHS_COMB,
+    MCLIT_DAYS_OF_WEEK_FULL,  MCLIT_DAYS_OF_WEEK_ABBREV,  MCLIT_DAYS_OF_WEEK_COMB,
+    MCLIT_AM,  MCLIT_PM, 
+    MCLIT_LOCALE_ERAS,
+    MCLIT_BCE,	 MCLIT_CE,
+    MCLIT_BCE2,	 MCLIT_CE2,
+    MCLIT_BCE3,	 MCLIT_CE3,
+    MCLIT_LOCALE_NUMERALS,
+    MCLIT__END
+} ClockMsgCtLiteral;
+
+#define CLOCK_LOCALE_LITERAL_ARRAY(litarr, pref) static const char *const litarr[] = { \
+    pref "", \
+    pref "MONTHS_FULL", pref "MONTHS_ABBREV", pref "MONTHS_COMB", \
+    pref "DAYS_OF_WEEK_FULL", pref "DAYS_OF_WEEK_ABBREV", pref "DAYS_OF_WEEK_COMB", \
+    pref "AM", pref "PM", \
+    pref "LOCALE_ERAS", \
+    pref "BCE",	   pref "CE", \
+    pref "b.c.e.", pref "c.e.", \
+    pref "b.c.",   pref "a.d.", \
+    pref "LOCALE_NUMERALS", \
+}
+
+/*
+ * Structure containing the fields used in [clock format] and [clock scan]
+ */
+
+typedef struct TclDateFields {
+
+    /* Cacheable fields:	 */
+
+    Tcl_WideInt seconds;	/* Time expressed in seconds from the Posix
+				 * epoch */
+    Tcl_WideInt localSeconds;	/* Local time expressed in nominal seconds
+				 * from the Posix epoch */
+    int tzOffset;		/* Time zone offset in seconds east of
+				 * Greenwich */
+    int julianDay;		/* Julian Day Number in local time zone */
+    enum {BCE=1, CE=0} era;	/* Era */
+    int gregorian;		/* Flag == 1 if the date is Gregorian */
+    int year;			/* Year of the era */
+    int dayOfYear;		/* Day of the year (1 January == 1) */
+    int month;			/* Month number */
+    int dayOfMonth;		/* Day of the month */
+    int iso8601Year;		/* ISO8601 week-based year */
+    int iso8601Week;		/* ISO8601 week number */
+    int dayOfWeek;		/* Day of the week */
+    int hour;			/* Hours of day (in-between time only calculation) */
+    int minutes;		/* Minutes of day (in-between time only calculation) */
+    int secondOfDay;		/* Seconds of day (in-between time only calculation) */
+
+    /* Non cacheable fields:	 */
+
+    Tcl_Obj *tzName;		/* Name (or corresponding DST-abbreviation) of the
+				 * time zone, if set the refCount is incremented */
+} TclDateFields;
+
+#define ClockCacheableDateFieldsSize \
+    TclOffset(TclDateFields, tzName)
+
+/*
+ * Structure contains return parsed fields.
+ */
+
+typedef struct DateInfo {
+    const char *dateStart;
+    const char *dateInput;
+    const char *dateEnd;
+
+    TclDateFields date;
+
+    int		flags;
+
+    int dateHaveDate;
+
+    int dateMeridian;
+    int dateHaveTime;
+
+    int dateTimezone;
+    int dateDSTmode;
+    int dateHaveZone;
+
+    int dateRelMonth;
+    int dateRelDay;
+    int dateRelSeconds;
+    int dateHaveRel;
+
+    int dateMonthOrdinalIncr;
+    int dateMonthOrdinal;
+    int dateHaveOrdinalMonth;
+
+    int dateDayOrdinal;
+    int dateDayNumber;
+    int dateHaveDay;
+
+    int *dateRelPointer;
+
+    int dateSpaceCount;
+    int dateDigitCount;
+
+    int dateCentury;
+
+    Tcl_Obj* messages;	    /* Error messages */
+    const char* separatrix; /* String separating messages */
+} DateInfo;
+
+#define yydate	    (info->date)  /* Date fields used for converting */
+
+#define yyDay	    (info->date.dayOfMonth)
+#define yyMonth	    (info->date.month)
+#define yyYear	    (info->date.year)
+
+#define yyHour	    (info->date.hour)
+#define yyMinutes   (info->date.minutes)
+#define yySeconds   (info->date.secondOfDay)
+
+#define yyDSTmode   (info->dateDSTmode)
+#define yyDayOrdinal	(info->dateDayOrdinal)
+#define yyDayNumber (info->dateDayNumber)
+#define yyMonthOrdinalIncr  (info->dateMonthOrdinalIncr)
+#define yyMonthOrdinal	(info->dateMonthOrdinal)
+#define yyHaveDate  (info->dateHaveDate)
+#define yyHaveDay   (info->dateHaveDay)
+#define yyHaveOrdinalMonth (info->dateHaveOrdinalMonth)
+#define yyHaveRel   (info->dateHaveRel)
+#define yyHaveTime  (info->dateHaveTime)
+#define yyHaveZone  (info->dateHaveZone)
+#define yyTimezone  (info->dateTimezone)
+#define yyMeridian  (info->dateMeridian)
+#define yyRelMonth  (info->dateRelMonth)
+#define yyRelDay    (info->dateRelDay)
+#define yyRelSeconds	(info->dateRelSeconds)
+#define yyRelPointer	(info->dateRelPointer)
+#define yyInput	    (info->dateInput)
+#define yyDigitCount	(info->dateDigitCount)
+#define yySpaceCount	(info->dateSpaceCount)
+
+static inline void
+ClockInitDateInfo(DateInfo *info) {
+    memset(info, 0, sizeof(DateInfo));
+}
+
+/*
+ * Structure containing the command arguments supplied to [clock format] and [clock scan]
+ */
+
+#define CLF_EXTENDED	(1 << 4)
+#define CLF_STRICT	(1 << 8)
+#define CLF_LOCALE_USED (1 << 15)
+
+typedef struct ClockFmtScnCmdArgs {
+    ClientData clientData;  /* Opaque pointer to literal pool, etc. */
+    Tcl_Interp *interp;	    /* Tcl interpreter */
+
+    Tcl_Obj *formatObj;	    /* Format */
+    Tcl_Obj *localeObj;	    /* Name of the locale where the time will be expressed. */
+    Tcl_Obj *timezoneObj;   /* Default time zone in which the time will be expressed */
+    Tcl_Obj *baseObj;	    /* Base (scan and add) or clockValue (format) */
+    int	     flags;	    /* Flags control scanning */
+
+    Tcl_Obj *mcDictObj;	    /* Current dictionary of tcl::clock package for given localeObj*/
+} ClockFmtScnCmdArgs;
+
+/*
+ * Structure containing the client data for [clock]
+ */
+
+typedef struct ClockClientData {
+    size_t    refCount;		/* Number of live references. */
+    Tcl_Obj **literals;		/* Pool of object literals (common, locale independent). */
+    Tcl_Obj **mcLiterals;	/* Msgcat object literals with mc-keys for search with locale. */
+    Tcl_Obj **mcLitIdxs;	/* Msgcat object indices prefixed with _IDX_,
+				 * used for quick dictionary search */
+
+    /* Cache for current clock parameters, imparted via "configure" */
+    unsigned long LastTZEpoch;
+    int currentYearCentury;
+    int yearOfCenturySwitch;
+    Tcl_Obj *SystemTimeZone;
+    Tcl_Obj *SystemSetupTZData;
+    Tcl_Obj *GMTSetupTimeZone;
+    Tcl_Obj *GMTSetupTZData;
+    Tcl_Obj *AnySetupTimeZone;
+    Tcl_Obj *AnySetupTZData;
+    Tcl_Obj *LastUnnormSetupTimeZone;
+    Tcl_Obj *LastSetupTimeZone;
+    Tcl_Obj *LastSetupTZData;
+
+    Tcl_Obj *CurrentLocale;
+    Tcl_Obj *CurrentLocaleDict;
+    Tcl_Obj *LastUnnormUsedLocale;
+    Tcl_Obj *LastUsedLocale;
+    Tcl_Obj *LastUsedLocaleDict;
+
+    /* Cache for last base (last-second fast convert if base/tz not changed) */
+    struct {
+	Tcl_Obj *timezoneObj;
+	TclDateFields Date;
+    } lastBase;
+    /* Las-period cache for fast UTC2Local conversion */
+    struct {
+	/* keys */
+	Tcl_Obj	   *timezoneObj;
+	int	    changeover;
+	Tcl_WideInt seconds;
+	Tcl_WideInt rangesVal[2];   /* Bounds for cached time zone offset */
+	/* values */
+	int	    tzOffset;
+	Tcl_Obj	   *tzName;
+    } UTC2Local;
+    /* Las-period cache for fast Local2UTC conversion */
+    struct {
+	/* keys */
+	Tcl_Obj	   *timezoneObj;
+	int	    changeover;
+	Tcl_WideInt localSeconds;
+	Tcl_WideInt rangesVal[2];   /* Bounds for cached time zone offset */
+	/* values */
+	int	    tzOffset;
+    } Local2UTC;
+} ClockClientData;
+
+#define ClockDefaultYearCentury 2000
+#define ClockDefaultCenturySwitch 38
+
+/*
+ * Meridian: am, pm, or 24-hour style.
+ */
+
+typedef enum _MERIDIAN {
+    MERam, MERpm, MER24
+} MERIDIAN;
+
+/*
+ * Clock scan and format facilities.
+ */
+
+#define CLOCK_FMT_SCN_STORAGE_GC_SIZE 32
+
+#define CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE 2
+
+typedef struct ClockScanToken ClockScanToken;
+
+
+typedef int ClockScanTokenProc(
+	ClockFmtScnCmdArgs *opts,
+	DateInfo *info,
+	ClockScanToken *tok);
+
+
+typedef enum _CLCKTOK_TYPE {
+   CTOKT_DIGIT = 1, CTOKT_PARSER, CTOKT_SPACE, CTOKT_WORD, CTOKT_CHAR,
+   CFMTT_INT, CFMTT_WIDE, CFMTT_PROC
+} CLCKTOK_TYPE;
+
+typedef struct ClockScanTokenMap {
+    unsigned short int	type;
+    unsigned short int	flags;
+    unsigned short int	clearFlags;
+    unsigned short int	minSize;
+    unsigned short int	maxSize;
+    unsigned short int	offs;
+    ClockScanTokenProc *parser;
+    void	       *data;
+} ClockScanTokenMap;
+
+typedef struct ClockScanToken {
+    ClockScanTokenMap  *map;
+    struct {
+	const char *start;
+	const char *end;
+    } tokWord;
+    unsigned short int	endDistance;
+    unsigned short int	lookAhMin;
+    unsigned short int	lookAhMax;
+    unsigned short int	lookAhTok;
+} ClockScanToken;
+
+
+#define MIN_FMT_RESULT_BLOCK_ALLOC 200
+
+typedef struct DateFormat {
+    char *resMem;
+    char *resEnd;
+    char *output;
+
+    TclDateFields date;
+
+    Tcl_Obj *localeEra;
+} DateFormat;
+
+#define CLFMT_INCR	    (1 << 3)
+#define CLFMT_DECR	    (1 << 4)
+#define CLFMT_CALC	    (1 << 5)
+#define CLFMT_LOCALE_INDX   (1 << 8)
+
+typedef struct ClockFormatToken ClockFormatToken;
+
+typedef int ClockFormatTokenProc(
+	ClockFmtScnCmdArgs *opts,
+	DateFormat *dateFmt,
+	ClockFormatToken *tok,
+	int *val);
+
+typedef struct ClockFormatTokenMap {
+    unsigned short int	type;
+    const char	       *tostr;
+    unsigned short int	width;
+    unsigned short int	flags;
+    unsigned short int	divider;
+    unsigned short int	divmod;
+    unsigned short int	offs;
+    ClockFormatTokenProc *fmtproc;
+    void	       *data;
+} ClockFormatTokenMap;
+typedef struct ClockFormatToken {
+    ClockFormatTokenMap *map;
+    struct {
+	const char *start;
+	const char *end;
+    } tokWord;
+} ClockFormatToken;
+
+
+typedef struct ClockFmtScnStorage ClockFmtScnStorage;
+
+typedef struct ClockFmtScnStorage {
+    int			 objRefCount;	/* Reference count shared across threads */
+    ClockScanToken	*scnTok;
+    unsigned int	 scnTokC;
+    unsigned int	 scnSpaceCount; /* Count of mandatory spaces used in format */
+    ClockFormatToken	*fmtTok;
+    unsigned int	 fmtTokC;
+#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
+    ClockFmtScnStorage	*nextPtr;
+    ClockFmtScnStorage	*prevPtr;
+#endif
+#if 0
+   +Tcl_HashEntry    hashEntry		/* ClockFmtScnStorage is a derivate of Tcl_HashEntry,
+					 * stored by offset +sizeof(self) */
+#endif
+} ClockFmtScnStorage;
+
+/*
+ * Prototypes of module functions.
+ */
+
+MODULE_SCOPE int    ToSeconds(int Hours, int Minutes,
+			    int Seconds, MERIDIAN Meridian);
+MODULE_SCOPE int    IsGregorianLeapYear(TclDateFields *);
+MODULE_SCOPE void
+		    GetJulianDayFromEraYearWeekDay(
+			    TclDateFields *fields, int changeover);
+MODULE_SCOPE void
+		    GetJulianDayFromEraYearMonthDay(
+			    TclDateFields *fields, int changeover);
+MODULE_SCOPE void
+		    GetJulianDayFromEraYearDay(
+			    TclDateFields *fields, int changeover);
+MODULE_SCOPE int    ConvertUTCToLocal(ClientData clientData, Tcl_Interp *,
+			    TclDateFields *, Tcl_Obj *timezoneObj, int);
+MODULE_SCOPE Tcl_Obj *
+		    LookupLastTransition(Tcl_Interp *, Tcl_WideInt,
+			    int, Tcl_Obj *const *, Tcl_WideInt rangesVal[2]);
+
+MODULE_SCOPE int    TclClockFreeScan(Tcl_Interp *interp, DateInfo *info);
+
+/* tclClock.c module declarations */
+
+MODULE_SCOPE Tcl_Obj *
+		    ClockSetupTimeZone(ClientData clientData,
+		Tcl_Interp *interp, Tcl_Obj *timezoneObj);
+
+MODULE_SCOPE Tcl_Obj *
+		    ClockMCDict(ClockFmtScnCmdArgs *opts);
+MODULE_SCOPE Tcl_Obj *
+		    ClockMCGet(ClockFmtScnCmdArgs *opts, int mcKey);
+MODULE_SCOPE Tcl_Obj *
+		    ClockMCGetIdx(ClockFmtScnCmdArgs *opts, int mcKey);
+MODULE_SCOPE int    ClockMCSetIdx(ClockFmtScnCmdArgs *opts, int mcKey, 
+			Tcl_Obj *valObj);
+
+/* tclClockFmt.c module declarations */
+
+MODULE_SCOPE Tcl_Obj* 
+		    ClockFrmObjGetLocFmtKey(Tcl_Interp *interp,
+			Tcl_Obj *objPtr);
+
+MODULE_SCOPE ClockFmtScnStorage * 
+		    Tcl_GetClockFrmScnFromObj(Tcl_Interp *interp,
+			Tcl_Obj *objPtr);
+MODULE_SCOPE Tcl_Obj *
+		    ClockLocalizeFormat(ClockFmtScnCmdArgs *opts);
+
+MODULE_SCOPE int    ClockScan(register DateInfo *info,
+			Tcl_Obj *strObj, ClockFmtScnCmdArgs *opts);
+
+MODULE_SCOPE int    ClockFormat(register DateFormat *dateFmt, 
+			ClockFmtScnCmdArgs *opts);
+
+MODULE_SCOPE void   ClockFrmScnClearCaches(void);
+
+#endif /* _TCLCLOCK_H */
diff --git a/generic/tclDictObj.c b/generic/tclDictObj.c
index 428173d..593f5a3 100644
--- a/generic/tclDictObj.c
+++ b/generic/tclDictObj.c
@@ -51,6 +51,8 @@ static int		DictSetCmd(ClientData dummy, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const *objv);
 static int		DictSizeCmd(ClientData dummy, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const *objv);
+static int		DictSmartRefCmd(ClientData dummy, Tcl_Interp *interp,
+			    int objc, Tcl_Obj *const *objv);
 static int		DictUnsetCmd(ClientData dummy, Tcl_Interp *interp,
 			    int objc, Tcl_Obj *const *objv);
 static int		DictUpdateCmd(ClientData dummy, Tcl_Interp *interp,
@@ -98,6 +100,7 @@ static const EnsembleImplMap implementationMap[] = {
     {"replace",	DictReplaceCmd, NULL, NULL, NULL, 0 },
     {"set",	DictSetCmd,	TclCompileDictSetCmd, NULL, NULL, 0 },
     {"size",	DictSizeCmd,	TclCompileBasic1ArgCmd, NULL, NULL, 0 },
+    {"smartref",DictSmartRefCmd,NULL, NULL, NULL, 0 },
     {"unset",	DictUnsetCmd,	TclCompileDictUnsetCmd, NULL, NULL, 0 },
     {"update",	DictUpdateCmd,	TclCompileDictUpdateCmd, NULL, NULL, 0 },
     {"values",	DictValuesCmd,	TclCompileBasic1Or2ArgCmd, NULL, NULL, 0 },
@@ -142,7 +145,7 @@ typedef struct Dict {
 				 * the entries in the order that they are
 				 * created. */
     int epoch;			/* Epoch counter */
-    int refcount;		/* Reference counter (see above) */
+    size_t refCount;		/* Reference counter (see above) */
     Tcl_Obj *chain;		/* Linked list used for invalidating the
 				 * string representations of updated nested
 				 * dictionaries. */
@@ -392,7 +395,7 @@ DupDictInternalRep(
 
     newDict->epoch = 0;
     newDict->chain = NULL;
-    newDict->refcount = 1;
+    newDict->refCount = 1;
 
     /*
      * Store in the object.
@@ -427,8 +430,7 @@ FreeDictInternalRep(
 {
     Dict *dict = DICT(dictPtr);
 
-    dict->refcount--;
-    if (dict->refcount <= 0) {
+    if (dict->refCount-- <= 1) {
 	DeleteDict(dict);
     }
     dictPtr->typePtr = NULL;
@@ -713,7 +715,7 @@ SetDictFromAny(
     TclFreeIntRep(objPtr);
     dict->epoch = 0;
     dict->chain = NULL;
-    dict->refcount = 1;
+    dict->refCount = 1;
     DICT(objPtr) = dict;
     objPtr->internalRep.twoPtrValue.ptr2 = NULL;
     objPtr->typePtr = &tclDictType;
@@ -1117,7 +1119,7 @@ Tcl_DictObjFirst(
 	searchPtr->dictionaryPtr = (Tcl_Dict) dict;
 	searchPtr->epoch = dict->epoch;
 	searchPtr->next = cPtr->nextPtr;
-	dict->refcount++;
+	dict->refCount++;
 	if (keyPtrPtr != NULL) {
 	    *keyPtrPtr = Tcl_GetHashKey(&dict->table, &cPtr->entry);
 	}
@@ -1231,8 +1233,7 @@ Tcl_DictObjDone(
     if (searchPtr->epoch != -1) {
 	searchPtr->epoch = -1;
 	dict = (Dict *) searchPtr->dictionaryPtr;
-	dict->refcount--;
-	if (dict->refcount <= 0) {
+	if (dict->refCount-- <= 1) {
 	    DeleteDict(dict);
 	}
     }
@@ -1384,7 +1385,7 @@ Tcl_NewDictObj(void)
     InitChainTable(dict);
     dict->epoch = 0;
     dict->chain = NULL;
-    dict->refcount = 1;
+    dict->refCount = 1;
     DICT(dictPtr) = dict;
     dictPtr->internalRep.twoPtrValue.ptr2 = NULL;
     dictPtr->typePtr = &tclDictType;
@@ -1434,7 +1435,7 @@ Tcl_DbNewDictObj(
     InitChainTable(dict);
     dict->epoch = 0;
     dict->chain = NULL;
-    dict->refcount = 1;
+    dict->refCount = 1;
     DICT(dictPtr) = dict;
     dictPtr->internalRep.twoPtrValue.ptr2 = NULL;
     dictPtr->typePtr = &tclDictType;
@@ -1960,6 +1961,102 @@ DictSizeCmd(
 /*
  *----------------------------------------------------------------------
  *
+ * Tcl_DictObjSmartRef --
+ *
+ *	This function returns new tcl-object with the smart reference to
+ *	dictionary object.
+ *
+ *	Object returned with this function is a smart reference (pointer),
+ *	so new object of type tclDictType, that directly references given
+ *	dictionary object (with internally increased refCount).
+ *
+ *	The usage of such pointer objects allows to hold more as one
+ *	reference to the same real dictionary object, allows to make a pointer
+ *	to part of another dictionary, allows to change the dictionary without
+ *	regarding of the "shared" state of the dictionary object.
+ *
+ *	Prevents "called with shared object" exception if object is multiple
+ *	referenced.
+ *
+ * Results:
+ *	The newly create object (contains smart reference) is returned.
+ *	The returned object has a ref count of 0.
+ *
+ * Side effects:
+ *	Increases ref count of the referenced dictionary.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Obj *
+Tcl_DictObjSmartRef(
+    Tcl_Interp *interp,
+    Tcl_Obj    *dictPtr)
+{
+    Tcl_Obj *result;
+    Dict    *dict;
+
+    if (dictPtr->typePtr != &tclDictType
+	    && SetDictFromAny(interp, dictPtr) != TCL_OK) {
+	return NULL;
+    }
+
+    dict = DICT(dictPtr);
+
+    result = Tcl_NewObj();
+    DICT(result) = dict;
+    dict->refCount++;
+    result->internalRep.twoPtrValue.ptr2 = NULL;
+    result->typePtr = &tclDictType;
+
+    return result;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DictSmartRefCmd --
+ *
+ *	This function implements the "dict smartref" Tcl command.
+ *
+ *	See description of Tcl_DictObjSmartRef for details.
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	See the user documentation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+DictSmartRefCmd(
+    ClientData dummy,
+    Tcl_Interp *interp,
+    int objc,
+    Tcl_Obj *const *objv)
+{
+    Tcl_Obj *result;
+
+    if (objc != 2) {
+	Tcl_WrongNumArgs(interp, 1, objv, "dictionary");
+	return TCL_ERROR;
+    }
+
+    result = Tcl_DictObjSmartRef(interp, objv[1]);
+    if (result == NULL) {
+    	return TCL_ERROR;
+    }
+
+    Tcl_SetObjResult(interp, result);
+
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * DictExistsCmd --
  *
  *	This function implements the "dict exists" Tcl command. See the user
diff --git a/generic/tclEnsemble.c b/generic/tclEnsemble.c
index c1b0890..2480685 100644
--- a/generic/tclEnsemble.c
+++ b/generic/tclEnsemble.c
@@ -55,11 +55,12 @@ enum EnsSubcmds {
 };
 
 static const char *const ensembleCreateOptions[] = {
-    "-command", "-map", "-parameters", "-prefixes", "-subcommands",
-    "-unknown", NULL
+    "-command", "-compile", "-map", "-parameters", "-prefixes",
+    "-subcommands", "-unknown", NULL
 };
 enum EnsCreateOpts {
-    CRT_CMD, CRT_MAP, CRT_PARAM, CRT_PREFIX, CRT_SUBCMDS, CRT_UNKNOWN
+    CRT_CMD, CRT_COMPILE, CRT_MAP, CRT_PARAM, CRT_PREFIX,
+    CRT_SUBCMDS, CRT_UNKNOWN
 };
 
 static const char *const ensembleConfigOptions[] = {
@@ -183,6 +184,7 @@ TclNamespaceEnsembleCmd(
 	int permitPrefix = 1;
 	Tcl_Obj *unknownObj = NULL;
 	Tcl_Obj *paramObj = NULL;
+	int ensCompFlag = -1;
 
 	/*
 	 * Check that we've got option-value pairs... [Bug 1558654]
@@ -325,6 +327,12 @@ TclNamespaceEnsembleCmd(
 		    return TCL_ERROR;
 		}
 		continue;
+	    case CRT_COMPILE:
+		if (Tcl_GetBooleanFromObj(interp, objv[1], 
+			&ensCompFlag) != TCL_OK) {
+		    return TCL_ERROR;
+		};
+		continue;
 	    case CRT_UNKNOWN:
 		if (TclListObjLength(interp, objv[1], &len) != TCL_OK) {
 		    if (allocatedMapFlag) {
@@ -350,6 +358,12 @@ TclNamespaceEnsembleCmd(
 	Tcl_SetEnsembleMappingDict(interp, token, mapObj);
 	Tcl_SetEnsembleUnknownHandler(interp, token, unknownObj);
 	Tcl_SetEnsembleParameterList(interp, token, paramObj);
+	/* 
+	 * Ensemble should be compiled if it has map (performance purposes)
+	 */
+	if (ensCompFlag > 0 && mapObj != NULL) {
+	    Tcl_SetEnsembleFlags(interp, token, ENSEMBLE_COMPILE);
+	}
 
 	/*
 	 * Tricky! Must ensure that the result is not shared (command delete
diff --git a/generic/tclEnv.c b/generic/tclEnv.c
index 66ddb57..0041a40 100644
--- a/generic/tclEnv.c
+++ b/generic/tclEnv.c
@@ -17,6 +17,11 @@
 
 TCL_DECLARE_MUTEX(envMutex)	/* To serialize access to environ. */
 
+
+/* MODULE_SCOPE */
+unsigned long TclEnvEpoch = 0;	/* Epoch of the tcl environment 
+				 * (if changed with tcl-env). */
+
 static struct {
     int cacheSize;		/* Number of env strings in cache. */
     char **cache;		/* Array containing all of the environment
@@ -371,6 +376,7 @@ Tcl_PutEnv(
 	value[0] = '\0';
 	TclSetEnv(name, value+1);
     }
+    TclEnvEpoch++;
 
     Tcl_DStringFree(&nameString);
     return 0;
@@ -579,6 +585,7 @@ EnvTraceProc(
 
     if (flags & TCL_TRACE_ARRAY) {
 	TclSetupEnv(interp);
+	TclEnvEpoch++;
 	return NULL;
     }
 
@@ -599,6 +606,7 @@ EnvTraceProc(
 
 	value = Tcl_GetVar2(interp, "env", name2, TCL_GLOBAL_ONLY);
 	TclSetEnv(name2, value);
+	TclEnvEpoch++;
     }
 
     /*
@@ -622,6 +630,7 @@ EnvTraceProc(
 
     if (flags & TCL_TRACE_UNSETS) {
 	TclUnsetEnv(name2);
+	TclEnvEpoch++;
     }
     return NULL;
 }
diff --git a/generic/tclGetDate.y b/generic/tclGetDate.y
index da4c3fd..6d6a0d0 100644
--- a/generic/tclGetDate.y
+++ b/generic/tclGetDate.y
@@ -9,6 +9,7 @@
  *
  * Copyright (c) 1992-1995 Karl Lehenbauer and Mark Diekhans.
  * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright (c) 2015 Sergey G. Brester aka sebres.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
@@ -50,73 +51,11 @@
  * parsed fields will be returned.
  */
 
-typedef struct DateInfo {
-
-    Tcl_Obj* messages;		/* Error messages */
-    const char* separatrix;	/* String separating messages */
-
-    time_t dateYear;
-    time_t dateMonth;
-    time_t dateDay;
-    int dateHaveDate;
-
-    time_t dateHour;
-    time_t dateMinutes;
-    time_t dateSeconds;
-    int dateMeridian;
-    int dateHaveTime;
-
-    time_t dateTimezone;
-    int dateDSTmode;
-    int dateHaveZone;
-
-    time_t dateRelMonth;
-    time_t dateRelDay;
-    time_t dateRelSeconds;
-    int dateHaveRel;
-
-    time_t dateMonthOrdinal;
-    int dateHaveOrdinalMonth;
-
-    time_t dateDayOrdinal;
-    time_t dateDayNumber;
-    int dateHaveDay;
-
-    const char *dateStart;
-    const char *dateInput;
-    time_t *dateRelPointer;
-
-    int dateDigitCount;
-} DateInfo;
+#include "tclDate.h"
 
 #define YYMALLOC	ckalloc
 #define YYFREE(x)	(ckfree((void*) (x)))
 
-#define yyDSTmode	(info->dateDSTmode)
-#define yyDayOrdinal	(info->dateDayOrdinal)
-#define yyDayNumber	(info->dateDayNumber)
-#define yyMonthOrdinal	(info->dateMonthOrdinal)
-#define yyHaveDate	(info->dateHaveDate)
-#define yyHaveDay	(info->dateHaveDay)
-#define yyHaveOrdinalMonth (info->dateHaveOrdinalMonth)
-#define yyHaveRel	(info->dateHaveRel)
-#define yyHaveTime	(info->dateHaveTime)
-#define yyHaveZone	(info->dateHaveZone)
-#define yyTimezone	(info->dateTimezone)
-#define yyDay		(info->dateDay)
-#define yyMonth		(info->dateMonth)
-#define yyYear		(info->dateYear)
-#define yyHour		(info->dateHour)
-#define yyMinutes	(info->dateMinutes)
-#define yySeconds	(info->dateSeconds)
-#define yyMeridian	(info->dateMeridian)
-#define yyRelMonth	(info->dateRelMonth)
-#define yyRelDay	(info->dateRelDay)
-#define yyRelSeconds	(info->dateRelSeconds)
-#define yyRelPointer	(info->dateRelPointer)
-#define yyInput		(info->dateInput)
-#define yyDigitCount	(info->dateDigitCount)
-
 #define EPOCH		1970
 #define START_OF_TIME	1902
 #define END_OF_TIME	2037
@@ -150,14 +89,6 @@ typedef enum _DSTMODE {
     DSTon, DSToff, DSTmaybe
 } DSTMODE;
 
-/*
- * Meridian: am, pm, or 24-hour style.
- */
-
-typedef enum _MERIDIAN {
-    MERam, MERpm, MER24
-} MERIDIAN;
-
 %}
 
 %union {
@@ -176,8 +107,6 @@ static int		LookupWord(YYSTYPE* yylvalPtr, char *buff);
 				     DateInfo* info, const char *s);
  static int		TclDatelex(YYSTYPE* yylvalPtr, YYLTYPE* location,
 				   DateInfo* info);
-static time_t		ToSeconds(time_t Hours, time_t Minutes,
-			    time_t Seconds, MERIDIAN Meridian);
 MODULE_SCOPE int	yyparse(DateInfo*);
 
 %}
@@ -377,12 +306,12 @@ date	: tUNUMBER '/' tUNUMBER {
 	;
 
 ordMonth: tNEXT tMONTH {
-	    yyMonthOrdinal = 1;
-	    yyMonth = $2;
+	    yyMonthOrdinalIncr = 1;
+	    yyMonthOrdinal = $2;
 	}
 	| tNEXT tUNUMBER tMONTH {
-	    yyMonthOrdinal = $2;
-	    yyMonth = $3;
+	    yyMonthOrdinalIncr = $2;
+	    yyMonthOrdinal = $3;
 	}
 	;
 
@@ -730,11 +659,11 @@ TclDateerror(
     infoPtr->separatrix = "\n";
 }
 
-static time_t
+MODULE_SCOPE int
 ToSeconds(
-    time_t Hours,
-    time_t Minutes,
-    time_t Seconds,
+    int Hours,
+    int Minutes,
+    int Seconds,
     MERIDIAN Meridian)
 {
     if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59) {
@@ -957,65 +886,36 @@ TclDatelex(
 	} while (Count > 0);
     }
 }
-
+
 int
-TclClockOldscanObjCmd(
-    ClientData clientData,	/* Unused */
+TclClockFreeScan(
     Tcl_Interp *interp,		/* Tcl interpreter */
-    int objc,			/* Count of paraneters */
-    Tcl_Obj *const *objv)	/* Parameters */
+    DateInfo *info)		/* Input and result parameters */
 {
-    Tcl_Obj *result, *resultElement;
-    int yr, mo, da;
-    DateInfo dateInfo;
-    DateInfo* info = &dateInfo;
     int status;
 
-    if (objc != 5) {
-	Tcl_WrongNumArgs(interp, 1, objv,
-		"stringToParse baseYear baseMonth baseDay" );
-	return TCL_ERROR;
-    }
-
-    yyInput = Tcl_GetString( objv[1] );
-    dateInfo.dateStart = yyInput;
-
-    yyHaveDate = 0;
-    if (Tcl_GetIntFromObj(interp, objv[2], &yr) != TCL_OK
-	    || Tcl_GetIntFromObj(interp, objv[3], &mo) != TCL_OK
-	    || Tcl_GetIntFromObj(interp, objv[4], &da) != TCL_OK) {
-	return TCL_ERROR;
-    }
-    yyYear = yr; yyMonth = mo; yyDay = da;
-
-    yyHaveTime = 0;
-    yyHour = 0; yyMinutes = 0; yySeconds = 0; yyMeridian = MER24;
-
-    yyHaveZone = 0;
-    yyTimezone = 0; yyDSTmode = DSTmaybe;
-
-    yyHaveOrdinalMonth = 0;
-    yyMonthOrdinal = 0;
-
-    yyHaveDay = 0;
-    yyDayOrdinal = 0; yyDayNumber = 0;
+    /*
+     * yyInput = stringToParse;
+     * 
+     * ClockInitDateInfo(info) should be executed to pre-init info;
+     */
 
-    yyHaveRel = 0;
-    yyRelMonth = 0; yyRelDay = 0; yyRelSeconds = 0; yyRelPointer = NULL;
+    yyDSTmode = DSTmaybe;
 
-    dateInfo.messages = Tcl_NewObj();
-    dateInfo.separatrix = "";
-    Tcl_IncrRefCount(dateInfo.messages);
+    info->messages = Tcl_NewObj();
+    info->separatrix = "";
+    Tcl_IncrRefCount(info->messages);
 
-    status = yyparse(&dateInfo);
+    info->dateStart = yyInput;
+    status = yyparse(info);
     if (status == 1) {
-	Tcl_SetObjResult(interp, dateInfo.messages);
-	Tcl_DecrRefCount(dateInfo.messages);
+	Tcl_SetObjResult(interp, info->messages);
+	Tcl_DecrRefCount(info->messages);
 	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "PARSE", NULL);
 	return TCL_ERROR;
     } else if (status == 2) {
 	Tcl_SetObjResult(interp, Tcl_NewStringObj("memory exhausted", -1));
-	Tcl_DecrRefCount(dateInfo.messages);
+	Tcl_DecrRefCount(info->messages);
 	Tcl_SetErrorCode(interp, "TCL", "MEMORY", NULL);
 	return TCL_ERROR;
     } else if (status != 0) {
@@ -1023,11 +923,11 @@ TclClockOldscanObjCmd(
 						  "from date parser. Please "
 						  "report this error as a "
 						  "bug in Tcl.", -1));
-	Tcl_DecrRefCount(dateInfo.messages);
+	Tcl_DecrRefCount(info->messages);
 	Tcl_SetErrorCode(interp, "TCL", "BUG", NULL);
 	return TCL_ERROR;
     }
-    Tcl_DecrRefCount(dateInfo.messages);
+    Tcl_DecrRefCount(info->messages);
 
     if (yyHaveDate > 1) {
 	Tcl_SetObjResult(interp,
@@ -1060,6 +960,40 @@ TclClockOldscanObjCmd(
 	return TCL_ERROR;
     }
 
+    return TCL_OK;
+}
+
+int
+TclClockOldscanObjCmd(
+    ClientData clientData,	/* Unused */
+    Tcl_Interp *interp,		/* Tcl interpreter */
+    int objc,			/* Count of paraneters */
+    Tcl_Obj *const *objv)	/* Parameters */
+{
+    Tcl_Obj *result, *resultElement;
+    int yr, mo, da;
+    DateInfo dateInfo;
+    DateInfo* info = &dateInfo;
+
+    if (objc != 5) {
+	Tcl_WrongNumArgs(interp, 1, objv,
+		"stringToParse baseYear baseMonth baseDay" );
+	return TCL_ERROR;
+    }
+
+    yyInput = Tcl_GetString( objv[1] );
+
+    if (Tcl_GetIntFromObj(interp, objv[2], &yr) != TCL_OK
+	    || Tcl_GetIntFromObj(interp, objv[3], &mo) != TCL_OK
+	    || Tcl_GetIntFromObj(interp, objv[4], &da) != TCL_OK) {
+	return TCL_ERROR;
+    }
+    yyYear = yr; yyMonth = mo; yyDay = da;
+
+    if (TclClockFreeScan(interp, info) != TCL_OK) {
+    	return TCL_ERROR;
+    }
+
     result = Tcl_NewObj();
     resultElement = Tcl_NewObj();
     if (yyHaveDate) {
@@ -1111,9 +1045,9 @@ TclClockOldscanObjCmd(
     resultElement = Tcl_NewObj();
     if (yyHaveOrdinalMonth) {
 	Tcl_ListObjAppendElement(interp, resultElement,
-		Tcl_NewIntObj((int) yyMonthOrdinal));
+		Tcl_NewIntObj((int) yyMonthOrdinalIncr));
 	Tcl_ListObjAppendElement(interp, resultElement,
-		Tcl_NewIntObj((int) yyMonth));
+		Tcl_NewIntObj((int) yyMonthOrdinal));
     }
     Tcl_ListObjAppendElement(interp, result, resultElement);
 
diff --git a/generic/tclInt.h b/generic/tclInt.h
index 7b582c0..333a665 100644
--- a/generic/tclInt.h
+++ b/generic/tclInt.h
@@ -2884,6 +2884,7 @@ MODULE_SCOPE int	TclFindDictElement(Tcl_Interp *interp,
 			    const char *dict, int dictLength,
 			    const char **elementPtr, const char **nextPtr,
 			    int *sizePtr, int *literalPtr);
+MODULE_SCOPE Tcl_Obj *	Tcl_DictObjSmartRef(Tcl_Interp *interp, Tcl_Obj *);
 /* TIP #280 - Modified token based evulation, with line information. */
 MODULE_SCOPE int	TclEvalEx(Tcl_Interp *interp, const char *script,
 			    int numBytes, int flags, int line,
@@ -3151,10 +3152,22 @@ MODULE_SCOPE int	TclpLoadMemory(Tcl_Interp *interp, void *buffer,
 MODULE_SCOPE void	TclInitThreadStorage(void);
 MODULE_SCOPE void	TclFinalizeThreadDataThread(void);
 MODULE_SCOPE void	TclFinalizeThreadStorage(void);
+
 #ifdef TCL_WIDE_CLICKS
 MODULE_SCOPE Tcl_WideInt TclpGetWideClicks(void);
 MODULE_SCOPE double	TclpWideClicksToNanoseconds(Tcl_WideInt clicks);
+MODULE_SCOPE double	TclpWideClickInMicrosec(void);
+#else
+#   ifdef _WIN32
+#	define TCL_WIDE_CLICKS 1
+MODULE_SCOPE Tcl_WideInt TclpGetWideClicks(void);
+MODULE_SCOPE double	TclpWideClickInMicrosec(void);
+#	define		TclpWideClicksToNanoseconds(clicks) \
+				((double)(clicks) * TclpWideClickInMicrosec() * 1000)
+#   endif
 #endif
+MODULE_SCOPE Tcl_WideInt TclpGetMicroseconds(void);
+
 MODULE_SCOPE int	TclZlibInit(Tcl_Interp *interp);
 MODULE_SCOPE void *	TclpThreadCreateKey(void);
 MODULE_SCOPE void	TclpThreadDeleteKey(void *keyPtr);
@@ -3424,6 +3437,9 @@ MODULE_SCOPE int	Tcl_ThrowObjCmd(ClientData dummy, Tcl_Interp *interp,
 MODULE_SCOPE int	Tcl_TimeObjCmd(ClientData clientData,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const objv[]);
+MODULE_SCOPE int	Tcl_TimeRateObjCmd(ClientData clientData,
+			    Tcl_Interp *interp, int objc,
+			    Tcl_Obj *const objv[]);
 MODULE_SCOPE int	Tcl_TraceObjCmd(ClientData clientData,
 			    Tcl_Interp *interp, int objc,
 			    Tcl_Obj *const objv[]);
@@ -4858,6 +4874,13 @@ typedef struct NRE_callback {
 #define Tcl_Free(ptr)                 TclpFree(ptr)
 #endif
 
+/*
+ * Other externals.
+ */
+
+MODULE_SCOPE unsigned long TclEnvEpoch; /* Epoch of the tcl environment 
+                                         * (if changed with tcl-env). */
+
 #endif /* _TCLINT */
 
 /*
diff --git a/generic/tclStrIdxTree.c b/generic/tclStrIdxTree.c
new file mode 100644
index 0000000..291e481
--- /dev/null
+++ b/generic/tclStrIdxTree.c
@@ -0,0 +1,527 @@
+/*
+ * tclStrIdxTree.c --
+ *
+ *	Contains the routines for managing string index tries in Tcl. 
+ *
+ *	This code is back-ported from the tclSE engine, by Serg G. Brester.
+ *
+ * Copyright (c) 2016 by Sergey G. Brester aka sebres. All rights reserved.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * -----------------------------------------------------------------------
+ *
+ * String index tries are prepaired structures used for fast greedy search of the string 
+ * (index) by unique string prefix as key.
+ *
+ * Index tree build for two lists together can be explained in the following datagram
+ * 
+ * Lists:
+ *
+ *	{Januar Februar Maerz April Mai Juni Juli August September Oktober November Dezember}
+ *	{Jnr Fbr Mrz Apr Mai Jni Jli Agt Spt Okt Nvb Dzb}
+ *
+ * Index-Tree:
+ *
+ *	j		 0	 *	...
+ *	 anuar		 1	 *
+ *	 u		 0	 *	a		 0
+ *	  ni		 6	 *	 pril		 4
+ *	  li		 7	 *	 ugust		 8
+ *	 n		 0	 *	 gt		 8
+ *	  r		 1	 *	s		 9
+ *	  i		 6	 *	 eptember	 9
+ *	 li		 7	 *	 pt		 9
+ *	f		 2	 *	oktober		10
+ *	 ebruar		 2	 *	n		11
+ *	 br		 2	 *	 ovember	11
+ *	m		 0	 *	 vb		11
+ *	 a		 0	 *	d		12
+ *	  erz		 3	 *	 ezember	12
+ *	  i		 5	 *	 zb		12
+ *	 rz		 3	 *
+ *	...
+ *				  
+ * Thereby value 0 shows pure group items (corresponding ambigous matches).
+ * But the group may have a value if it contains only same values 
+ * (see for example group "f" above).
+ *
+ * StrIdxTree's are very fast, so:
+ *    build of above-mentioned tree takes about 10 microseconds.
+ *    search of string index in this tree takes fewer as 0.1 microseconds.
+ *
+ */
+
+#include "tclInt.h"
+#include "tclStrIdxTree.h"
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclStrIdxTreeSearch --
+ *
+ *  Find largest part of string "start" in indexed tree (case sensitive).
+ *
+ *  Also used for building of string index tree.
+ *
+ * Results:
+ *  Return position of UTF character in start after last equal character
+ *  and found item (with parent).
+ *
+ * Side effects:
+ *  None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE const char*
+TclStrIdxTreeSearch(
+    TclStrIdxTree **foundParent, /* Return value of found sub tree (used for tree build) */
+    TclStrIdx	  **foundItem,	 /* Return value of found item */
+    TclStrIdxTree  *tree,	 /* Index tree will be browsed */
+    const char	*start,		 /* UTF string to find in tree */
+    const char	*end)		 /* End of string */
+{
+    TclStrIdxTree *parent = tree, *prevParent = tree;
+    TclStrIdx  *item = tree->firstPtr, *prevItem = NULL;
+    const char *s = start, *f, *cin, *cinf, *prevf;
+    int offs = 0;
+
+    if (item == NULL) {
+	goto done;
+    }
+
+    /* search in tree */
+    do {
+	cinf = cin = TclGetString(item->key) + offs;
+	f = TclUtfFindEqualNCInLwr(s, end, cin, cin + item->length, &cinf);
+	/* if something was found */
+	if (f > s) {
+	    /* if whole string was found */
+	    if (f >= end) {
+		start = f;
+		goto done;
+	    };
+	    /* set new offset and shift start string */
+	    offs += cinf - cin;
+	    s = f;
+	    /* if match item, go deeper as long as possible */
+	    if (offs >= item->length && item->childTree.firstPtr) {
+		/* save previuosly found item (if not ambigous) for 
+		 * possible fallback (few greedy match) */
+		if (item->value != NULL) {
+		    prevf = f;
+		    prevItem = item;
+		    prevParent = parent;
+		}
+		parent = &item->childTree;
+		item = item->childTree.firstPtr;
+		continue;
+	    }
+	    /* no children - return this item and current chars found */
+	    start = f;
+	    goto done;
+	}
+
+	item = item->nextPtr;
+
+    } while (item != NULL);
+
+    /* fallback (few greedy match) not ambigous (has a value) */
+    if (prevItem != NULL) {
+	item = prevItem;
+	parent = prevParent;
+	start = prevf;
+    }
+
+done:
+
+    if (foundParent)
+	*foundParent = parent;
+    if (foundItem)
+	*foundItem = item;
+    return start;
+}
+
+MODULE_SCOPE void 
+TclStrIdxTreeFree(
+    TclStrIdx *tree)
+{
+    while (tree != NULL) {
+	TclStrIdx *t;
+	Tcl_DecrRefCount(tree->key);
+	if (tree->childTree.firstPtr != NULL) {
+	    TclStrIdxTreeFree(tree->childTree.firstPtr);
+	}
+	t = tree, tree = tree->nextPtr;
+	ckfree(t);
+    }	
+}
+
+/*
+ * Several bidirectional list primitives
+ */
+inline void 
+TclStrIdxTreeInsertBranch(
+    TclStrIdxTree *parent,
+    register TclStrIdx *item,
+    register TclStrIdx *child)
+{
+    if (parent->firstPtr == child)
+	parent->firstPtr = item;
+    if (parent->lastPtr == child)
+	parent->lastPtr = item;
+    if ( (item->nextPtr = child->nextPtr) ) {
+	item->nextPtr->prevPtr = item;
+	child->nextPtr = NULL;
+    }
+    if ( (item->prevPtr = child->prevPtr) ) {
+	item->prevPtr->nextPtr = item;
+	child->prevPtr = NULL;
+    }
+    item->childTree.firstPtr = child;
+    item->childTree.lastPtr = child;
+}
+
+inline void
+TclStrIdxTreeAppend(
+    register TclStrIdxTree *parent,
+    register TclStrIdx	   *item)
+{
+    if (parent->lastPtr != NULL) {
+	parent->lastPtr->nextPtr = item;
+    }
+    item->prevPtr = parent->lastPtr;
+    item->nextPtr = NULL;
+    parent->lastPtr = item;
+    if (parent->firstPtr == NULL) {
+	parent->firstPtr = item;
+    }
+}
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclStrIdxTreeBuildFromList --
+ *
+ * Build or extend string indexed tree from tcl list.
+ * If the values not given the values of built list are indices starts with 1.
+ * Value of 0 is thereby reserved to the ambigous values.
+ *
+ * Important: by multiple lists, optimal tree can be created only if list with
+ * larger strings used firstly.
+ *
+ * Results:
+ *  Returns a standard Tcl result.
+ *
+ * Side effects:
+ *  None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE int
+TclStrIdxTreeBuildFromList(
+    TclStrIdxTree *idxTree,
+    int	       lstc,
+    Tcl_Obj  **lstv,
+    ClientData *values)
+{
+    Tcl_Obj  **lwrv;
+    int i, ret = TCL_ERROR;
+    ClientData val;
+    const char *s, *e, *f;
+    TclStrIdx	*item;
+
+    /* create lowercase reflection of the list keys */
+
+    lwrv = ckalloc(sizeof(Tcl_Obj*) * lstc);
+    if (lwrv == NULL) {
+	return TCL_ERROR;
+    }
+    for (i = 0; i < lstc; i++) {
+	lwrv[i] = Tcl_DuplicateObj(lstv[i]);
+	if (lwrv[i] == NULL) {
+	    return TCL_ERROR;
+	}
+	Tcl_IncrRefCount(lwrv[i]);
+	lwrv[i]->length = Tcl_UtfToLower(TclGetString(lwrv[i]));
+    }
+
+    /* build index tree of the list keys */
+    for (i = 0; i < lstc; i++) {
+	TclStrIdxTree *foundParent = idxTree;
+	e = s = TclGetString(lwrv[i]);
+	e += lwrv[i]->length;
+	val = values ? values[i] : INT2PTR(i+1);
+
+	/* ignore empty keys (impossible to index it) */
+	if (lwrv[i]->length == 0) continue;
+
+	item = NULL;
+	if (idxTree->firstPtr != NULL) {
+	    TclStrIdx  *foundItem;
+	    f = TclStrIdxTreeSearch(&foundParent, &foundItem,
+		idxTree, s, e);
+	    /* if common prefix was found */
+	    if (f > s) {
+		/* ignore element if fulfilled or ambigous */
+		if (f == e) {
+		    continue;
+		}
+		/* if shortest key was found with the same value,
+		 * just replace its current key with longest key */
+		if ( foundItem->value == val
+		  && foundItem->length < lwrv[i]->length
+		  && foundItem->childTree.firstPtr == NULL
+		) {
+		    Tcl_SetObjRef(foundItem->key, lwrv[i]);
+		    foundItem->length = lwrv[i]->length;
+		    continue;
+		}
+		/* split tree (e. g. j->(jan,jun) + jul == j->(jan,ju->(jun,jul)) ) 
+		 * but don't split by fulfilled child of found item ( ii->iii->iiii ) */
+		if (foundItem->length != (f - s)) {
+		    /* first split found item (insert one between parent and found + new one) */
+		    item = ckalloc(sizeof(*item));
+		    if (item == NULL) {
+			goto done;
+		    }
+		    Tcl_InitObjRef(item->key, foundItem->key);
+		    item->length = f - s;
+		    /* set value or mark as ambigous if not the same value of both */
+		    item->value = (foundItem->value == val) ? val : NULL;
+		    /* insert group item between foundParent and foundItem */
+		    TclStrIdxTreeInsertBranch(foundParent, item, foundItem);
+		    foundParent = &item->childTree;
+		} else {
+		    /* the new item should be added as child of found item */
+		    foundParent = &foundItem->childTree;
+		}
+	    }
+	}
+	/* append item at end of found parent */
+	item = ckalloc(sizeof(*item));
+	if (item == NULL) {
+	    goto done;
+	}
+	item->childTree.lastPtr = item->childTree.firstPtr = NULL;
+	Tcl_InitObjRef(item->key, lwrv[i]);
+	item->length = lwrv[i]->length;
+	item->value = val;
+	TclStrIdxTreeAppend(foundParent, item);
+    };
+
+    ret = TCL_OK;
+
+done:
+
+    if (lwrv != NULL) {
+	for (i = 0; i < lstc; i++) {
+	    Tcl_DecrRefCount(lwrv[i]);
+	}
+	ckfree(lwrv);
+    }
+
+    if (ret != TCL_OK) {
+	if (idxTree->firstPtr != NULL) {
+	    TclStrIdxTreeFree(idxTree->firstPtr);
+	}
+    }
+
+    return ret;
+}
+
+
+static void
+StrIdxTreeObj_DupIntRepProc(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr);
+static void
+StrIdxTreeObj_FreeIntRepProc(Tcl_Obj *objPtr);
+static void
+StrIdxTreeObj_UpdateStringProc(Tcl_Obj *objPtr);
+
+Tcl_ObjType StrIdxTreeObjType = {
+    "str-idx-tree",		    /* name */
+    StrIdxTreeObj_FreeIntRepProc,   /* freeIntRepProc */
+    StrIdxTreeObj_DupIntRepProc,    /* dupIntRepProc */
+    StrIdxTreeObj_UpdateStringProc, /* updateStringProc */
+    NULL			    /* setFromAnyProc */
+};
+
+MODULE_SCOPE Tcl_Obj* 
+TclStrIdxTreeNewObj()
+{
+    Tcl_Obj *objPtr = Tcl_NewObj();
+    objPtr->internalRep.twoPtrValue.ptr1 = NULL;
+    objPtr->internalRep.twoPtrValue.ptr2 = NULL;
+    objPtr->typePtr = &StrIdxTreeObjType;
+    /* return tree root in internal representation */
+    return objPtr;
+}
+
+static void
+StrIdxTreeObj_DupIntRepProc(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr)
+{
+    /* follow links (smart pointers) */
+    if ( srcPtr->internalRep.twoPtrValue.ptr1 != NULL
+      && srcPtr->internalRep.twoPtrValue.ptr2 == NULL
+    ) {
+	srcPtr = (Tcl_Obj*)srcPtr->internalRep.twoPtrValue.ptr1;
+    }
+    /* create smart pointer to it (ptr1 != NULL, ptr2 = NULL) */
+    Tcl_InitObjRef(*((Tcl_Obj **)&copyPtr->internalRep.twoPtrValue.ptr1), 
+	srcPtr);
+    copyPtr->internalRep.twoPtrValue.ptr2 = NULL;
+    copyPtr->typePtr = &StrIdxTreeObjType;
+}
+
+static void
+StrIdxTreeObj_FreeIntRepProc(Tcl_Obj *objPtr)
+{
+    /* follow links (smart pointers) */
+    if ( objPtr->internalRep.twoPtrValue.ptr1 != NULL
+      && objPtr->internalRep.twoPtrValue.ptr2 == NULL
+    ) {
+	/* is a link */
+	Tcl_UnsetObjRef(*((Tcl_Obj **)&objPtr->internalRep.twoPtrValue.ptr1));
+    } else {
+	/* is a tree */
+	TclStrIdxTree *tree = (TclStrIdxTree*)&objPtr->internalRep.twoPtrValue.ptr1;
+	if (tree->firstPtr != NULL) {
+	    TclStrIdxTreeFree(tree->firstPtr);
+	}
+	objPtr->internalRep.twoPtrValue.ptr1 = NULL;
+	objPtr->internalRep.twoPtrValue.ptr2 = NULL;
+    }
+    objPtr->typePtr = NULL;
+};
+
+static void
+StrIdxTreeObj_UpdateStringProc(Tcl_Obj *objPtr)
+{
+    /* currently only dummy empty string possible */
+    objPtr->length = 0;
+    objPtr->bytes = &tclEmptyString;
+};
+
+MODULE_SCOPE TclStrIdxTree *
+TclStrIdxTreeGetFromObj(Tcl_Obj *objPtr) {
+    /* follow links (smart pointers) */
+    if (objPtr->typePtr != &StrIdxTreeObjType) {
+	return NULL;
+    }
+    if ( objPtr->internalRep.twoPtrValue.ptr1 != NULL
+      && objPtr->internalRep.twoPtrValue.ptr2 == NULL
+    ) {
+	objPtr = (Tcl_Obj*)objPtr->internalRep.twoPtrValue.ptr1;
+    }
+    /* return tree root in internal representation */
+    return (TclStrIdxTree*)&objPtr->internalRep.twoPtrValue.ptr1;
+}
+
+/*
+ * Several debug primitives
+ */
+#if 0
+/* currently unused, debug resp. test purposes only */
+
+void 
+TclStrIdxTreePrint(
+    Tcl_Interp *interp,
+    TclStrIdx  *tree,
+    int offs)
+{
+    Tcl_Obj *obj[2];
+    const char *s;
+    Tcl_InitObjRef(obj[0], Tcl_NewStringObj("::puts", -1));
+    while (tree != NULL) {
+	s = TclGetString(tree->key) + offs;
+	Tcl_InitObjRef(obj[1], Tcl_ObjPrintf("%*s%.*s\t:%d", 
+		offs, "", tree->length - offs, s, tree->value));
+	Tcl_PutsObjCmd(NULL, interp, 2, obj);
+	Tcl_UnsetObjRef(obj[1]);
+	if (tree->childTree.firstPtr != NULL) {
+	    TclStrIdxTreePrint(interp, tree->childTree.firstPtr, tree->length);
+	}
+	tree = tree->nextPtr;
+    }
+    Tcl_UnsetObjRef(obj[0]);
+}
+
+
+MODULE_SCOPE int
+TclStrIdxTreeTestObjCmd(
+    ClientData clientData, Tcl_Interp *interp,
+    int objc, Tcl_Obj *const objv[])
+{
+    const char *cs, *cin, *ret;
+
+    static const char *const options[] = {
+	"index", "puts-index", "findequal",
+	NULL
+    };
+    enum optionInd {
+	O_INDEX,  O_PUTS_INDEX, O_FINDEQUAL
+    };
+    int optionIndex;
+
+    if (objc < 2) {
+	Tcl_SetResult(interp, "wrong # args", TCL_STATIC);
+	return TCL_ERROR;
+    }
+    if (Tcl_GetIndexFromObj(interp, objv[1], options, 
+	"option", 0, &optionIndex) != TCL_OK) {
+	Tcl_SetErrorCode(interp, "CLOCK", "badOption",
+		Tcl_GetString(objv[1]), NULL);
+	return TCL_ERROR;
+    }
+    switch (optionIndex) {
+    case O_FINDEQUAL:
+	if (objc < 4) {
+	    Tcl_SetResult(interp, "wrong # args", TCL_STATIC);
+	    return TCL_ERROR;
+	}
+	cs = TclGetString(objv[2]);
+	cin = TclGetString(objv[3]);
+	ret = TclUtfFindEqual(
+	    cs, cs + objv[1]->length, cin, cin + objv[2]->length);
+	Tcl_SetObjResult(interp, Tcl_NewIntObj(ret - cs));
+    break;
+    case O_INDEX:
+    case O_PUTS_INDEX:
+
+    if (1) {
+	Tcl_Obj **lstv;
+	int i, lstc;
+	TclStrIdxTree idxTree = {NULL, NULL};
+	i = 1;
+	while (++i < objc) {
+	    if (TclListObjGetElements(interp, objv[i], 
+		    &lstc, &lstv) != TCL_OK) {
+		return TCL_ERROR;
+	    };
+	    TclStrIdxTreeBuildFromList(&idxTree, lstc, lstv, NULL);
+	}
+	if (optionIndex == O_PUTS_INDEX) {
+	    TclStrIdxTreePrint(interp, idxTree.firstPtr, 0);
+	}
+	TclStrIdxTreeFree(idxTree.firstPtr);
+    }
+    break;
+    }
+
+    return TCL_OK;
+}
+
+#endif
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
diff --git a/generic/tclStrIdxTree.h b/generic/tclStrIdxTree.h
new file mode 100644
index 0000000..9f26907
--- /dev/null
+++ b/generic/tclStrIdxTree.h
@@ -0,0 +1,169 @@
+/*
+ * tclStrIdxTree.h --
+ *
+ *	Declarations of string index tries and other primitives currently 
+ *  back-ported from tclSE.
+ *
+ * Copyright (c) 2016 Serg G. Brester (aka sebres)
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _TCLSTRIDXTREE_H
+#define _TCLSTRIDXTREE_H
+
+
+/*
+ * Main structures declarations of index tree and entry
+ */
+
+typedef struct TclStrIdxTree {
+    struct TclStrIdx *firstPtr;
+    struct TclStrIdx *lastPtr;
+} TclStrIdxTree;
+
+typedef struct TclStrIdx {
+    struct TclStrIdxTree childTree;
+    struct TclStrIdx *nextPtr;
+    struct TclStrIdx *prevPtr;
+    Tcl_Obj	*key;
+    int		 length;
+    ClientData	 value;
+} TclStrIdx;
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclUtfFindEqual, TclUtfFindEqualNC --
+ *
+ *  Find largest part of string cs in string cin (case sensitive and not). 
+ *
+ * Results:
+ *  Return position of UTF character in cs after last equal character.
+ *
+ * Side effects:
+ *  None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static inline const char *
+TclUtfFindEqual(
+    register const char *cs,	/* UTF string to find in cin. */
+    register const char *cse,	/* End of cs */
+    register const char *cin,	/* UTF string will be browsed. */
+    register const char *cine)	/* End of cin */
+{
+    register const char *ret = cs;
+    Tcl_UniChar ch1, ch2;
+    do {
+	cs += TclUtfToUniChar(cs, &ch1);
+	cin += TclUtfToUniChar(cin, &ch2);
+	if (ch1 != ch2) break;
+    } while ((ret = cs) < cse && cin < cine);
+    return ret;
+}
+
+static inline const char *
+TclUtfFindEqualNC(
+    register const char *cs,	/* UTF string to find in cin. */
+    register const char *cse,	/* End of cs */
+    register const char *cin,	/* UTF string will be browsed. */
+    register const char *cine,	/* End of cin */
+    const char	     **cinfnd)	/* Return position in cin */
+{
+    register const char *ret = cs;
+    Tcl_UniChar ch1, ch2;
+    do {
+	cs += TclUtfToUniChar(cs, &ch1);
+	cin += TclUtfToUniChar(cin, &ch2);
+	if (ch1 != ch2) {
+	    ch1 = Tcl_UniCharToLower(ch1);
+	    ch2 = Tcl_UniCharToLower(ch2);
+	    if (ch1 != ch2) break;
+	}
+	*cinfnd = cin;
+    } while ((ret = cs) < cse && cin < cine);
+    return ret;
+}
+
+static inline const char *
+TclUtfFindEqualNCInLwr(
+    register const char *cs,	/* UTF string (in anycase) to find in cin. */
+    register const char *cse,	/* End of cs */
+    register const char *cin,	/* UTF string (in lowercase) will be browsed. */
+    register const char *cine,	/* End of cin */
+    const char	     **cinfnd)	/* Return position in cin */
+{
+    register const char *ret = cs;
+    Tcl_UniChar ch1, ch2;
+    do {
+	cs += TclUtfToUniChar(cs, &ch1);
+	cin += TclUtfToUniChar(cin, &ch2);
+	if (ch1 != ch2) {
+	    ch1 = Tcl_UniCharToLower(ch1);
+	    if (ch1 != ch2) break;
+	}
+	*cinfnd = cin;
+    } while ((ret = cs) < cse && cin < cine);
+    return ret;
+}
+
+static inline const char *
+TclUtfNext(
+    register const char *src)	/* The current location in the string. */
+{
+    if (((unsigned char) *(src)) < 0xC0) {
+	return ++src;
+    } else {
+	Tcl_UniChar ch;
+	return src + TclUtfToUniChar(src, &ch);
+    }
+}
+
+
+/*
+ * Primitives to safe set, reset and free references.
+ */
+
+#define Tcl_UnsetObjRef(obj) \
+  if (obj != NULL) { Tcl_DecrRefCount(obj); obj = NULL; }
+#define Tcl_InitObjRef(obj, val) \
+  obj = val; if (obj) { Tcl_IncrRefCount(obj); }
+#define Tcl_SetObjRef(obj, val) \
+if (1) { \
+  Tcl_Obj *nval = val; \
+  if (obj != nval) { \
+    Tcl_Obj *prev = obj; \
+    Tcl_InitObjRef(obj, nval); \
+    if (prev != NULL) { Tcl_DecrRefCount(prev); }; \
+  } \
+}
+
+/*
+ * Prototypes of module functions.
+ */
+
+MODULE_SCOPE const char*
+		    TclStrIdxTreeSearch(TclStrIdxTree **foundParent,
+			TclStrIdx **foundItem, TclStrIdxTree *tree, 
+			const char *start, const char *end);
+
+MODULE_SCOPE int    TclStrIdxTreeBuildFromList(TclStrIdxTree *idxTree,
+			int lstc, Tcl_Obj **lstv, ClientData *values);
+
+MODULE_SCOPE Tcl_Obj* 
+		    TclStrIdxTreeNewObj();
+
+MODULE_SCOPE TclStrIdxTree*
+		    TclStrIdxTreeGetFromObj(Tcl_Obj *objPtr);
+
+#if 1
+
+MODULE_SCOPE int    TclStrIdxTreeTestObjCmd(ClientData, Tcl_Interp *,
+			int, Tcl_Obj *const objv[]);
+#endif
+
+#endif /* _TCLSTRIDXTREE_H */
diff --git a/library/clock.tcl b/library/clock.tcl
index 8e4b657..94d2341 100644
--- a/library/clock.tcl
+++ b/library/clock.tcl
@@ -10,6 +10,7 @@
 #----------------------------------------------------------------------
 #
 # Copyright (c) 2004,2005,2006,2007 by Kevin B. Kenny
+# Copyright (c) 2015 by Sergey G. Brester aka sebres.
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
@@ -287,6 +288,12 @@ proc ::tcl::clock::Initialize {} {
 
     variable FEB_28	       58
 
+    # Default configuration
+
+    configure -default-locale  [mclocale]
+    #configure -year-century    2000 \
+    #          -century-switch  38
+
     # Translation table to map Windows TZI onto cities, so that the Olson
     # rules can apply.  In some cases the mapping is ambiguous, so it's wise
     # to specify $::env(TCL_TZ) rather than simply depending on the system
@@ -383,152 +390,6 @@ proc ::tcl::clock::Initialize {} {
 	{46800 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0}   :Pacific/Tongatapu
     }]
 
-    # Groups of fields that specify the date, priorities, and code bursts that
-    # determine Julian Day Number given those groups.  The code in [clock
-    # scan] will choose the highest priority (lowest numbered) set of fields
-    # that determines the date.
-
-    variable DateParseActions {
-
-	{ seconds } 0 {}
-
-	{ julianDay } 1 {}
-
-	{ era century yearOfCentury month dayOfMonth } 2 {
-	    dict set date year [expr { 100 * [dict get $date century]
-				       + [dict get $date yearOfCentury] }]
-	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
-			  $changeover]
-	}
-	{ era century yearOfCentury dayOfYear } 2 {
-	    dict set date year [expr { 100 * [dict get $date century]
-				       + [dict get $date yearOfCentury] }]
-	    set date [GetJulianDayFromEraYearDay $date[set date {}] \
-			  $changeover]
-	}
-
-	{ century yearOfCentury month dayOfMonth } 3 {
-	    dict set date era CE
-	    dict set date year [expr { 100 * [dict get $date century]
-				       + [dict get $date yearOfCentury] }]
-	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
-			  $changeover]
-	}
-	{ century yearOfCentury dayOfYear } 3 {
-	    dict set date era CE
-	    dict set date year [expr { 100 * [dict get $date century]
-				       + [dict get $date yearOfCentury] }]
-	    set date [GetJulianDayFromEraYearDay $date[set date {}] \
-			  $changeover]
-	}
-	{ iso8601Century iso8601YearOfCentury iso8601Week dayOfWeek } 3 {
-	    dict set date era CE
-	    dict set date iso8601Year \
-		[expr { 100 * [dict get $date iso8601Century]
-			+ [dict get $date iso8601YearOfCentury] }]
-	    set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
-			 $changeover]
-	}
-
-	{ yearOfCentury month dayOfMonth } 4 {
-	    set date [InterpretTwoDigitYear $date[set date {}] $baseTime]
-	    dict set date era CE
-	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
-			  $changeover]
-	}
-	{ yearOfCentury dayOfYear } 4 {
-	    set date [InterpretTwoDigitYear $date[set date {}] $baseTime]
-	    dict set date era CE
-	    set date [GetJulianDayFromEraYearDay $date[set date {}] \
-			  $changeover]
-	}
-	{ iso8601YearOfCentury iso8601Week dayOfWeek } 4 {
-	    set date [InterpretTwoDigitYear \
-			  $date[set date {}] $baseTime \
-			  iso8601YearOfCentury iso8601Year]
-	    dict set date era CE
-	    set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
-			 $changeover]
-	}
-
-	{ month dayOfMonth } 5 {
-	    set date [AssignBaseYear $date[set date {}] \
-			  $baseTime $timeZone $changeover]
-	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
-			  $changeover]
-	}
-	{ dayOfYear } 5 {
-	    set date [AssignBaseYear $date[set date {}] \
-			  $baseTime $timeZone $changeover]
-	    set date [GetJulianDayFromEraYearDay $date[set date {}] \
-			 $changeover]
-	}
-	{ iso8601Week dayOfWeek } 5 {
-	    set date [AssignBaseIso8601Year $date[set date {}] \
-			  $baseTime $timeZone $changeover]
-	    set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
-			 $changeover]
-	}
-
-	{ dayOfMonth } 6 {
-	    set date [AssignBaseMonth $date[set date {}] \
-			  $baseTime $timeZone $changeover]
-	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
-			  $changeover]
-	}
-
-	{ dayOfWeek } 7 {
-	    set date [AssignBaseWeek $date[set date {}] \
-			  $baseTime $timeZone $changeover]
-	    set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
-			 $changeover]
-	}
-
-	{} 8 {
-	    set date [AssignBaseJulianDay $date[set date {}] \
-			  $baseTime $timeZone $changeover]
-	}
-    }
-
-    # Groups of fields that specify time of day, priorities, and code that
-    # processes them
-
-    variable TimeParseActions {
-
-	seconds 1 {}
-
-	{ hourAMPM minute second amPmIndicator } 2 {
-	    dict set date secondOfDay [InterpretHMSP $date]
-	}
-	{ hour minute second } 2 {
-	    dict set date secondOfDay [InterpretHMS $date]
-	}
-
-	{ hourAMPM minute amPmIndicator } 3 {
-	    dict set date second 0
-	    dict set date secondOfDay [InterpretHMSP $date]
-	}
-	{ hour minute } 3 {
-	    dict set date second 0
-	    dict set date secondOfDay [InterpretHMS $date]
-	}
-
-	{ hourAMPM amPmIndicator } 4 {
-	    dict set date minute 0
-	    dict set date second 0
-	    dict set date secondOfDay [InterpretHMSP $date]
-	}
-	{ hour } 4 {
-	    dict set date minute 0
-	    dict set date second 0
-	    dict set date secondOfDay [InterpretHMS $date]
-	}
-
-	{ } 5 {
-	    dict set date secondOfDay 0
-	}
-    }
-
     # Legacy time zones, used primarily for parsing RFC822 dates.
 
     variable LegacyTimeZone [dict create \
@@ -623,17 +484,17 @@ proc ::tcl::clock::Initialize {} {
 
     # Caches
 
-    variable LocaleNumeralCache {};	# Dictionary whose keys are locale
+    variable LocaleFormats \
+			[dict create];	# Dictionary with localized formats
+
+    variable LocaleNumeralCache \
+			[dict create];	# Dictionary whose keys are locale
 					# names and whose values are pairs
 					# comprising regexes matching numerals
 					# in the given locales and dictionaries
 					# mapping the numerals to their numeric
 					# values.
-    # variable CachedSystemTimeZone;    # If 'CachedSystemTimeZone' exists,
-					# it contains the value of the
-					# system time zone, as determined from
-					# the environment.
-    variable TimeZoneBad {};	        # Dictionary whose keys are time zone
+    variable TimeZoneBad [dict create]; # Dictionary whose keys are time zone
     					# names and whose values are 1 if
 					# the time zone is unknown and 0
     					# if it is known.
@@ -649,1640 +510,58 @@ proc ::tcl::clock::Initialize {} {
 ::tcl::clock::Initialize
 
 #----------------------------------------------------------------------
-#
-# clock format --
-#
-#	Formats a count of seconds since the Posix Epoch as a time of day.
-#
-# The 'clock format' command formats times of day for output.  Refer to the
-# user documentation to see what it does.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::format { args } {
-
-    variable FormatProc
-    variable TZData
-
-    lassign [ParseFormatArgs {*}$args] format locale timezone
-    set locale [string tolower $locale]
-    set clockval [lindex $args 0]
-
-    # Get the data for time changes in the given zone
-
-    if {$timezone eq ""} {
-	set timezone [GetSystemTimeZone]
-    }
-    if {![info exists TZData($timezone)]} {
-	if {[catch {SetupTimeZone $timezone} retval opts]} {
-	    dict unset opts -errorinfo
-	    return -options $opts $retval
-	}
-    }
-
-    # Build a procedure to format the result. Cache the built procedure's name
-    # in the 'FormatProc' array to avoid losing its internal representation,
-    # which contains the name resolution.
-
-    set procName formatproc'$format'$locale
-    set procName [namespace current]::[string map {: {\:} \\ {\\}} $procName]
-    if {[info exists FormatProc($procName)]} {
-	set procName $FormatProc($procName)
-    } else {
-	set FormatProc($procName) \
-	    [ParseClockFormatFormat $procName $format $locale]
-    }
-
-    return [$procName $clockval $timezone]
-
-}
-
-#----------------------------------------------------------------------
-#
-# ParseClockFormatFormat --
-#
-#	Builds and caches a procedure that formats a time value.
-#
-# Parameters:
-#	format -- Format string to use
-#	locale -- Locale in which the format string is to be interpreted
-#
-# Results:
-#	Returns the name of the newly-built procedure.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::ParseClockFormatFormat {procName format locale} {
-
-    if {[namespace which $procName] ne {}} {
-	return $procName
-    }
-
-    # Map away the locale-dependent composite format groups
-
-    EnterLocale $locale
-
-    # Change locale if a fresh locale has been given on the command line.
-
-    try {
-	return [ParseClockFormatFormat2 $format $locale $procName]
-    } trap CLOCK {result opts} {
-	dict unset opts -errorinfo
-	return -options $opts $result
-    }
-}
-
-proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
-    set didLocaleEra 0
-    set didLocaleNumerals 0
-    set preFormatCode \
-	[string map [list @GREGORIAN_CHANGE_DATE@ \
-				       [mc GREGORIAN_CHANGE_DATE]] \
-	     {
-		 variable TZData
-		 set date [GetDateFields $clockval \
-			       $TZData($timezone) \
-			       @GREGORIAN_CHANGE_DATE@]
-	     }]
-    set formatString {}
-    set substituents {}
-    set state {}
-
-    set format [LocalizeFormat $locale $format]
-
-    foreach char [split $format {}] {
-	switch -exact -- $state {
-	    {} {
-		if { [string equal % $char] } {
-		    set state percent
-		} else {
-		    append formatString $char
-		}
-	    }
-	    percent {			# Character following a '%' character
-		set state {}
-		switch -exact -- $char {
-		    % {			# A literal character, '%'
-			append formatString %%
-		    }
-		    a {			# Day of week, abbreviated
-			append formatString %s
-			append substituents \
-			    [string map \
-				 [list @DAYS_OF_WEEK_ABBREV@ \
-				      [list [mc DAYS_OF_WEEK_ABBREV]]] \
-				 { [lindex @DAYS_OF_WEEK_ABBREV@ \
-					[expr {[dict get $date dayOfWeek] \
-						   % 7}]]}]
-		    }
-		    A {			# Day of week, spelt out.
-			append formatString %s
-			append substituents \
-			    [string map \
-				 [list @DAYS_OF_WEEK_FULL@ \
-				      [list [mc DAYS_OF_WEEK_FULL]]] \
-				 { [lindex @DAYS_OF_WEEK_FULL@ \
-					[expr {[dict get $date dayOfWeek] \
-						   % 7}]]}]
-		    }
-		    b - h {		# Name of month, abbreviated.
-			append formatString %s
-			append substituents \
-			    [string map \
-				 [list @MONTHS_ABBREV@ \
-				      [list [mc MONTHS_ABBREV]]] \
-				 { [lindex @MONTHS_ABBREV@ \
-					[expr {[dict get $date month]-1}]]}]
-		    }
-		    B {			# Name of month, spelt out
-			append formatString %s
-			append substituents \
-			    [string map \
-				 [list @MONTHS_FULL@ \
-				      [list [mc MONTHS_FULL]]] \
-				 { [lindex @MONTHS_FULL@ \
-					[expr {[dict get $date month]-1}]]}]
-		    }
-		    C {			# Century number
-			append formatString %02d
-			append substituents \
-			    { [expr {[dict get $date year] / 100}]}
-		    }
-		    d {			# Day of month, with leading zero
-			append formatString %02d
-			append substituents { [dict get $date dayOfMonth]}
-		    }
-		    e {			# Day of month, without leading zero
-			append formatString %2d
-			append substituents { [dict get $date dayOfMonth]}
-		    }
-		    E {			# Format group in a locale-dependent
-					# alternative era
-			set state percentE
-			if {!$didLocaleEra} {
-			    append preFormatCode \
-				[string map \
-				     [list @LOCALE_ERAS@ \
-					  [list [mc LOCALE_ERAS]]] \
-				     {
-					 set date [GetLocaleEra \
-						       $date[set date {}] \
-						       @LOCALE_ERAS@]}] \n
-			    set didLocaleEra 1
-			}
-			if {!$didLocaleNumerals} {
-			    append preFormatCode \
-				[list set localeNumerals \
-				     [mc LOCALE_NUMERALS]] \n
-			    set didLocaleNumerals 1
-			}
-		    }
-		    g {			# Two-digit year relative to ISO8601
-					# week number
-			append formatString %02d
-			append substituents \
-			    { [expr { [dict get $date iso8601Year] % 100 }]}
-		    }
-		    G {			# Four-digit year relative to ISO8601
-					# week number
-			append formatString %02d
-			append substituents { [dict get $date iso8601Year]}
-		    }
-		    H {			# Hour in the 24-hour day, leading zero
-			append formatString %02d
-			append substituents \
-			    { [expr { [dict get $date localSeconds] \
-					  / 3600 % 24}]}
-		    }
-		    I {			# Hour AM/PM, with leading zero
-			append formatString %02d
-			append substituents \
-			    { [expr { ( ( ( [dict get $date localSeconds] \
-					    % 86400 ) \
-					  + 86400 \
-					  - 3600 ) \
-					/ 3600 ) \
-				      % 12 + 1 }] }
-		    }
-		    j {			# Day of year (001-366)
-			append formatString %03d
-			append substituents { [dict get $date dayOfYear]}
-		    }
-		    J {			# Julian Day Number
-			append formatString %07ld
-			append substituents { [dict get $date julianDay]}
-		    }
-		    k {			# Hour (0-23), no leading zero
-			append formatString %2d
-			append substituents \
-			    { [expr { [dict get $date localSeconds]
-				      / 3600
-				      % 24 }]}
-		    }
-		    l {			# Hour (12-11), no leading zero
-			append formatString %2d
-			append substituents \
-			    { [expr { ( ( ( [dict get $date localSeconds]
-					   % 86400 )
-					 + 86400
-					 - 3600 )
-				       / 3600 )
-				     % 12 + 1 }]}
-		    }
-		    m {			# Month number, leading zero
-			append formatString %02d
-			append substituents { [dict get $date month]}
-		    }
-		    M {			# Minute of the hour, leading zero
-			append formatString %02d
-			append substituents \
-			    { [expr { [dict get $date localSeconds]
-				      / 60
-				      % 60 }]}
-		    }
-		    n {			# A literal newline
-			append formatString \n
-		    }
-		    N {			# Month number, no leading zero
-			append formatString %2d
-			append substituents { [dict get $date month]}
-		    }
-		    O {			# A format group in the locale's
-					# alternative numerals
-			set state percentO
-			if {!$didLocaleNumerals} {
-			    append preFormatCode \
-				[list set localeNumerals \
-				     [mc LOCALE_NUMERALS]] \n
-			    set didLocaleNumerals 1
-			}
-		    }
-		    p {			# Localized 'AM' or 'PM' indicator
-					# converted to uppercase
-			append formatString %s
-			append preFormatCode \
-			    [list set AM [string toupper [mc AM]]] \n \
-			    [list set PM [string toupper [mc PM]]] \n
-			append substituents \
-			    { [expr {(([dict get $date localSeconds]
-				       % 86400) < 43200) ?
-				     $AM : $PM}]}
-		    }
-		    P {			# Localized 'AM' or 'PM' indicator
-			append formatString %s
-			append preFormatCode \
-			    [list set am [mc AM]] \n \
-			    [list set pm [mc PM]] \n
-			append substituents \
-			    { [expr {(([dict get $date localSeconds]
-				       % 86400) < 43200) ?
-				     $am : $pm}]}
-
-		    }
-		    Q {			# Hi, Jeff!
-			append formatString %s
-			append substituents { [FormatStarDate $date]}
-		    }
-		    s {			# Seconds from the Posix Epoch
-			append formatString %s
-			append substituents { [dict get $date seconds]}
-		    }
-		    S {			# Second of the minute, with
-			# leading zero
-			append formatString %02d
-			append substituents \
-			    { [expr { [dict get $date localSeconds]
-				      % 60 }]}
-		    }
-		    t {			# A literal tab character
-			append formatString \t
-		    }
-		    u {			# Day of the week (1-Monday, 7-Sunday)
-			append formatString %1d
-			append substituents { [dict get $date dayOfWeek]}
-		    }
-		    U {			# Week of the year (00-53). The
-					# first Sunday of the year is the
-					# first day of week 01
-			append formatString %02d
-			append preFormatCode {
-			    set dow [dict get $date dayOfWeek]
-			    if { $dow == 7 } {
-				set dow 0
-			    }
-			    incr dow
-			    set UweekNumber \
-				[expr { ( [dict get $date dayOfYear]
-					  - $dow + 7 )
-					/ 7 }]
-			}
-			append substituents { $UweekNumber}
-		    }
-		    V {			# The ISO8601 week number
-			append formatString %02d
-			append substituents { [dict get $date iso8601Week]}
-		    }
-		    w {			# Day of the week (0-Sunday,
-					# 6-Saturday)
-			append formatString %1d
-			append substituents \
-			    { [expr { [dict get $date dayOfWeek] % 7 }]}
-		    }
-		    W {			# Week of the year (00-53). The first
-					# Monday of the year is the first day
-					# of week 01.
-			append preFormatCode {
-			    set WweekNumber \
-				[expr { ( [dict get $date dayOfYear]
-					  - [dict get $date dayOfWeek]
-					  + 7 )
-					/ 7 }]
-			}
-			append formatString %02d
-			append substituents { $WweekNumber}
-		    }
-		    y {			# The two-digit year of the century
-			append formatString %02d
-			append substituents \
-			    { [expr { [dict get $date year] % 100 }]}
-		    }
-		    Y {			# The four-digit year
-			append formatString %04d
-			append substituents { [dict get $date year]}
-		    }
-		    z {			# The time zone as hours and minutes
-					# east (+) or west (-) of Greenwich
-			append formatString %s
-			append substituents { [FormatNumericTimeZone \
-						   [dict get $date tzOffset]]}
-		    }
-		    Z {			# The name of the time zone
-			append formatString %s
-			append substituents { [dict get $date tzName]}
-		    }
-		    % {			# A literal percent character
-			append formatString %%
-		    }
-		    default {		# An unknown escape sequence
-			append formatString %% $char
-		    }
-		}
-	    }
-	    percentE {			# Character following %E
-		set state {}
-		switch -exact -- $char {
-		    E {
-			append formatString %s
-			append substituents { } \
-			    [string map \
-				 [list @BCE@ [list [mc BCE]] \
-				      @CE@ [list [mc CE]]] \
-				      {[dict get {BCE @BCE@ CE @CE@} \
-					    [dict get $date era]]}]
-		    }
-		    C {			# Locale-dependent era
-			append formatString %s
-			append substituents { [dict get $date localeEra]}
-		    }
-		    y {			# Locale-dependent year of the era
-			append preFormatCode {
-			    set y [dict get $date localeYear]
-			    if { $y >= 0 && $y < 100 } {
-				set Eyear [lindex $localeNumerals $y]
-			    } else {
-				set Eyear $y
-			    }
-			}
-			append formatString %s
-			append substituents { $Eyear}
-		    }
-		    default {		# Unknown %E format group
-			append formatString %%E $char
-		    }
-		}
-	    }
-	    percentO {			# Character following %O
-		set state {}
-		switch -exact -- $char {
-		    d - e {		# Day of the month in alternative
-			# numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals \
-				   [dict get $date dayOfMonth]]}
-		    }
-		    H - k {		# Hour of the day in alternative
-					# numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals \
-				   [expr { [dict get $date localSeconds]
-					   / 3600
-					   % 24 }]]}
-		    }
-		    I - l {		# Hour (12-11) AM/PM in alternative
-					# numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals \
-				   [expr { ( ( ( [dict get $date localSeconds]
-						 % 86400 )
-					       + 86400
-					       - 3600 )
-					     / 3600 )
-					   % 12 + 1 }]]}
-		    }
-		    m {			# Month number in alternative numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals [dict get $date month]]}
-		    }
-		    M {			# Minute of the hour in alternative
-					# numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals \
-				   [expr { [dict get $date localSeconds]
-					   / 60
-					   % 60 }]]}
-		    }
-		    S {			# Second of the minute in alternative
-					# numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals \
-				   [expr { [dict get $date localSeconds]
-					   % 60 }]]}
-		    }
-		    u {			# Day of the week (Monday=1,Sunday=7)
-					# in alternative numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals \
-				   [dict get $date dayOfWeek]]}
-			}
-		    w {			# Day of the week (Sunday=0,Saturday=6)
-					# in alternative numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals \
-				   [expr { [dict get $date dayOfWeek] % 7 }]]}
-		    }
-		    y {			# Year of the century in alternative
-					# numerals
-			append formatString %s
-			append substituents \
-			    { [lindex $localeNumerals \
-				   [expr { [dict get $date year] % 100 }]]}
-		    }
-		    default {	# Unknown format group
-			append formatString %%O $char
-		    }
-		}
-	    }
-	}
-    }
-
-    # Clean up any improperly terminated groups
-
-    switch -exact -- $state {
-	percent {
-	    append formatString %%
-	}
-	percentE {
-	    append retval %%E
-	}
-	percentO {
-	    append retval %%O
-	}
-    }
-
-    proc $procName {clockval timezone} "
-        $preFormatCode
-        return \[::format [list $formatString] $substituents\]
-    "
-
-    #    puts [list $procName [info args $procName] [info body $procName]]
-
-    return $procName
-}
-
-#----------------------------------------------------------------------
-#
-# clock scan --
-#
-#	Inputs a count of seconds since the Posix Epoch as a time of day.
-#
-# The 'clock format' command scans times of day on input.  Refer to the user
-# documentation to see what it does.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::scan { args } {
-
-    set format {}
-
-    # Check the count of args
-
-    if { [llength $args] < 1 || [llength $args] % 2 != 1 } {
-	set cmdName "clock scan"
-	return -code error \
-	    -errorcode [list CLOCK wrongNumArgs] \
-	    "wrong \# args: should be\
-             \"$cmdName string\
-             ?-base seconds?\
-             ?-format string? ?-gmt boolean?\
-             ?-locale LOCALE? ?-timezone ZONE?\""
-    }
-
-    # Set defaults
-
-    set base [clock seconds]
-    set string [lindex $args 0]
-    set format {}
-    set gmt 0
-    set locale c
-    set timezone [GetSystemTimeZone]
-
-    # Pick up command line options.
-
-    foreach { flag value } [lreplace $args 0 0] {
-	set saw($flag) {}
-	switch -exact -- $flag {
-	    -b - -ba - -bas - -base {
-		set base $value
-	    }
-	    -f - -fo - -for - -form - -forma - -format {
-		set format $value
-	    }
-	    -g - -gm - -gmt {
-		set gmt $value
-	    }
-	    -l - -lo - -loc - -loca - -local - -locale {
-		set locale [string tolower $value]
-	    }
-	    -t - -ti - -tim - -time - -timez - -timezo - -timezon - -timezone {
-		set timezone $value
-	    }
-	    default {
-		return -code error \
-		    -errorcode [list CLOCK badOption $flag] \
-		    "bad option \"$flag\",\
-                     must be -base, -format, -gmt, -locale or -timezone"
-	    }
-	}
-    }
-
-    # Check options for validity
-
-    if { [info exists saw(-gmt)] && [info exists saw(-timezone)] } {
-	return -code error \
-	    -errorcode [list CLOCK gmtWithTimezone] \
-	    "cannot use -gmt and -timezone in same call"
-    }
-    if { [catch { expr { wide($base) } } result] } {
-	return -code error "expected integer but got \"$base\""
-    }
-    if { ![string is boolean -strict $gmt] } {
-	return -code error "expected boolean value but got \"$gmt\""
-    } elseif { $gmt } {
-	set timezone :GMT
-    }
-
-    if { ![info exists saw(-format)] } {
-	# Perhaps someday we'll localize the legacy code. Right now, it's not
-	# localized.
-	if { [info exists saw(-locale)] } {
-	    return -code error \
-		-errorcode [list CLOCK flagWithLegacyFormat] \
-		"legacy \[clock scan\] does not support -locale"
-
-	}
-	return [FreeScan $string $base $timezone $locale]
-    }
-
-    # Change locale if a fresh locale has been given on the command line.
-
-    EnterLocale $locale
-
-    try {
-	# Map away the locale-dependent composite format groups
-
-	set scanner [ParseClockScanFormat $format $locale]
-	return [$scanner $string $base $timezone]
-    } trap CLOCK {result opts} {
-	# Conceal location of generation of expected errors
-	dict unset opts -errorinfo
-	return -options $opts $result
-    }
-}
-
-#----------------------------------------------------------------------
-#
-# FreeScan --
-#
-#	Scans a time in free format
-#
-# Parameters:
-#	string - String containing the time to scan
-#	base - Base time, expressed in seconds from the Epoch
-#	timezone - Default time zone in which the time will be expressed
-#	locale - (Unused) Name of the locale where the time will be scanned.
-#
-# Results:
-#	Returns the date and time extracted from the string in seconds from
-#	the epoch
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::FreeScan { string base timezone locale } {
-
-    variable TZData
-
-    # Get the data for time changes in the given zone
-
-    try {
-	SetupTimeZone $timezone
-    } on error {retval opts} {
-	dict unset opts -errorinfo
-	return -options $opts $retval
-    }
-
-    # Extract year, month and day from the base time for the parser to use as
-    # defaults
-
-    set date [GetDateFields $base $TZData($timezone) 2361222]
-    dict set date secondOfDay [expr {
-	[dict get $date localSeconds] % 86400
-    }]
-
-    # Parse the date.  The parser will return a list comprising date, time,
-    # time zone, relative month/day/seconds, relative weekday, ordinal month.
-
-    try {
-	set scanned [Oldscan $string \
-		     [dict get $date year] \
-		     [dict get $date month] \
-		     [dict get $date dayOfMonth]]
-	lassign $scanned \
-	    parseDate parseTime parseZone parseRel \
-	    parseWeekday parseOrdinalMonth
-    } on error message {
-	return -code error \
-	    "unable to convert date-time string \"$string\": $message"
-    }
-
-    # If the caller supplied a date in the string, update the 'date' dict with
-    # the value. If the caller didn't specify a time with the date, default to
-    # midnight.
-
-    if { [llength $parseDate] > 0 } {
-	lassign $parseDate y m d
-	if { $y < 100 } {
-	    if { $y >= 39 } {
-		incr y 1900
-	    } else {
-		incr y 2000
-	    }
-	}
-	dict set date era CE
-	dict set date year $y
-	dict set date month $m
-	dict set date dayOfMonth $d
-	if { $parseTime eq {} } {
-	    set parseTime 0
-	}
-    }
-
-    # If the caller supplied a time zone in the string, it comes back as a
-    # two-element list; the first element is the number of minutes east of
-    # Greenwich, and the second is a Daylight Saving Time indicator (1 == yes,
-    # 0 == no, -1 == unknown). We make it into a time zone indicator of
-    # +-hhmm.
-
-    if { [llength $parseZone] > 0 } {
-	lassign $parseZone minEast dstFlag
-	set timezone [FormatNumericTimeZone \
-			  [expr { 60 * $minEast + 3600 * $dstFlag }]]
-	SetupTimeZone $timezone
-    }
-    dict set date tzName $timezone
-
-    # Assemble date, time, zone into seconds-from-epoch
-
-    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] 2361222]
-    if { $parseTime ne {} } {
-	dict set date secondOfDay $parseTime
-    } elseif { [llength $parseWeekday] != 0
-	       || [llength $parseOrdinalMonth] != 0
-	       || ( [llength $parseRel] != 0
-		    && ( [lindex $parseRel 0] != 0
-			 || [lindex $parseRel 1] != 0 ) ) } {
-	dict set date secondOfDay 0
-    }
-
-    dict set date localSeconds [expr {
-	-210866803200
-	+ ( 86400 * wide([dict get $date julianDay]) )
-	+ [dict get $date secondOfDay]
-    }]
-    dict set date tzName $timezone
-    set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) 2361222]
-    set seconds [dict get $date seconds]
-
-    # Do relative times
-
-    if { [llength $parseRel] > 0 } {
-	lassign $parseRel relMonth relDay relSecond
-	set seconds [add $seconds \
-			 $relMonth months $relDay days $relSecond seconds \
-			 -timezone $timezone -locale $locale]
-    }
-
-    # Do relative weekday
-
-    if { [llength $parseWeekday] > 0 } {
-	lassign $parseWeekday dayOrdinal dayOfWeek
-	set date2 [GetDateFields $seconds $TZData($timezone) 2361222]
-	dict set date2 era CE
-	set jdwkday [WeekdayOnOrBefore $dayOfWeek [expr {
-	    [dict get $date2 julianDay] + 6
-	}]]
-	incr jdwkday [expr { 7 * $dayOrdinal }]
-	if { $dayOrdinal > 0 } {
-	    incr jdwkday -7
-	}
-	dict set date2 secondOfDay \
-	    [expr { [dict get $date2 localSeconds] % 86400 }]
-	dict set date2 julianDay $jdwkday
-	dict set date2 localSeconds [expr {
-	    -210866803200
-	    + ( 86400 * wide([dict get $date2 julianDay]) )
-	    + [dict get $date secondOfDay]
-	}]
-	dict set date2 tzName $timezone
-	set date2 [ConvertLocalToUTC $date2[set date2 {}] $TZData($timezone) \
-		       2361222]
-	set seconds [dict get $date2 seconds]
-
-    }
-
-    # Do relative month
-
-    if { [llength $parseOrdinalMonth] > 0 } {
-	lassign $parseOrdinalMonth monthOrdinal monthNumber
-	if { $monthOrdinal > 0 } {
-	    set monthDiff [expr { $monthNumber - [dict get $date month] }]
-	    if { $monthDiff <= 0 } {
-		incr monthDiff 12
-	    }
-	    incr monthOrdinal -1
-	} else {
-	    set monthDiff [expr { [dict get $date month] - $monthNumber }]
-	    if { $monthDiff >= 0 } {
-		incr monthDiff -12
-	    }
-	    incr monthOrdinal
-	}
-	set seconds [add $seconds $monthOrdinal years $monthDiff months \
-			 -timezone $timezone -locale $locale]
-    }
-
-    return $seconds
-}
-
-
-#----------------------------------------------------------------------
-#
-# ParseClockScanFormat --
-#
-#	Parses a format string given to [clock scan -format]
-#
-# Parameters:
-#	formatString - The format being parsed
-#	locale - The current locale
-#
-# Results:
-#	Constructs and returns a procedure that accepts the string being
-#	scanned, the base time, and the time zone.  The procedure will either
-#	return the scanned time or else throw an error that should be rethrown
-#	to the caller of [clock scan]
-#
-# Side effects:
-#	The given procedure is defined in the ::tcl::clock namespace.  Scan
-#	procedures are not deleted once installed.
-#
-# Why do we parse dates by defining a procedure to parse them?  The reason is
-# that by doing so, we have one convenient place to cache all the information:
-# the regular expressions that match the patterns (which will be compiled),
-# the code that assembles the date information, everything lands in one place.
-# In this way, when a given format is reused at run time, all the information
-# of how to apply it is available in a single place.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
-    # Check whether the format has been parsed previously, and return the
-    # existing recognizer if it has.
-
-    set procName scanproc'$formatString'$locale
-    set procName [namespace current]::[string map {: {\:} \\ {\\}} $procName]
-    if { [namespace which $procName] != {} } {
-	return $procName
-    }
-
-    variable DateParseActions
-    variable TimeParseActions
-
-    # Localize the %x, %X, etc. groups
-
-    set formatString [LocalizeFormat $locale $formatString]
-
-    # Condense whitespace
-
-    regsub -all {[[:space:]]+} $formatString { } formatString
-
-    # Walk through the groups of the format string.  In this loop, we
-    # accumulate:
-    #	- a regular expression that matches the string,
-    #   - the count of capturing brackets in the regexp
-    #   - a set of code that post-processes the fields captured by the regexp,
-    #   - a dictionary whose keys are the names of fields that are present
-    #     in the format string.
-
-    set re {^[[:space:]]*}
-    set captureCount 0
-    set postcode {}
-    set fieldSet [dict create]
-    set fieldCount 0
-    set postSep {}
-    set state {}
-
-    foreach c [split $formatString {}] {
-	switch -exact -- $state {
-	    {} {
-		if { $c eq "%" } {
-		    set state %
-		} elseif { $c eq " " } {
-		    append re {[[:space:]]+}
-		} else {
-		    if { ! [string is alnum $c] } {
-			append re "\\"
-		    }
-		    append re $c
-		}
-	    }
-	    % {
-		set state {}
-		switch -exact -- $c {
-		    % {
-			append re %
-		    }
-		    { } {
-			append re "\[\[:space:\]\]*"
-		    }
-		    a - A { 		# Day of week, in words
-			set l {}
-			foreach \
-			    i {7 1 2 3 4 5 6} \
-			    abr [mc DAYS_OF_WEEK_ABBREV] \
-			    full [mc DAYS_OF_WEEK_FULL] {
-				dict set l [string tolower $abr] $i
-				dict set l [string tolower $full] $i
-				incr i
-			    }
-			lassign [UniquePrefixRegexp $l] regex lookup
-			append re ( $regex )
-			dict set fieldSet dayOfWeek [incr fieldCount]
-			append postcode "dict set date dayOfWeek \[" \
-			    "dict get " [list $lookup] " " \
-			    \[ {string tolower $field} [incr captureCount] \] \
-			    "\]\n"
-		    }
-		    b - B - h {		# Name of month
-			set i 0
-			set l {}
-			foreach \
-			    abr [mc MONTHS_ABBREV] \
-			    full [mc MONTHS_FULL] {
-				incr i
-				dict set l [string tolower $abr] $i
-				dict set l [string tolower $full] $i
-			    }
-			lassign [UniquePrefixRegexp $l] regex lookup
-			append re ( $regex )
-			dict set fieldSet month [incr fieldCount]
-			append postcode "dict set date month \[" \
-			    "dict get " [list $lookup] \
-			    " " \[ {string tolower $field} \
-			    [incr captureCount] \] \
-			    "\]\n"
-		    }
-		    C {			# Gregorian century
-			append re \\s*(\\d\\d?)
-			dict set fieldSet century [incr fieldCount]
-			append postcode "dict set date century \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    d - e {		# Day of month
-			append re \\s*(\\d\\d?)
-			dict set fieldSet dayOfMonth [incr fieldCount]
-			append postcode "dict set date dayOfMonth \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    E {			# Prefix for locale-specific codes
-			set state %E
-		    }
-		    g {			# ISO8601 2-digit year
-			append re \\s*(\\d\\d)
-			dict set fieldSet iso8601YearOfCentury \
-			    [incr fieldCount]
-			append postcode \
-			    "dict set date iso8601YearOfCentury \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    G {			# ISO8601 4-digit year
-			append re \\s*(\\d\\d)(\\d\\d)
-			dict set fieldSet iso8601Century [incr fieldCount]
-			dict set fieldSet iso8601YearOfCentury \
-			    [incr fieldCount]
-			append postcode \
-			    "dict set date iso8601Century \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n" \
-			    "dict set date iso8601YearOfCentury \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    H - k {		# Hour of day
-			append re \\s*(\\d\\d?)
-			dict set fieldSet hour [incr fieldCount]
-			append postcode "dict set date hour \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    I - l {		# Hour, AM/PM
-			append re \\s*(\\d\\d?)
-			dict set fieldSet hourAMPM [incr fieldCount]
-			append postcode "dict set date hourAMPM \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    j {			# Day of year
-			append re \\s*(\\d\\d?\\d?)
-			dict set fieldSet dayOfYear [incr fieldCount]
-			append postcode "dict set date dayOfYear \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    J {			# Julian Day Number
-			append re \\s*(\\d+)
-			dict set fieldSet julianDay [incr fieldCount]
-			append postcode "dict set date julianDay \[" \
-			    "::scan \$field" [incr captureCount] " %ld" \
-			    "\]\n"
-		    }
-		    m - N {		# Month number
-			append re \\s*(\\d\\d?)
-			dict set fieldSet month [incr fieldCount]
-			append postcode "dict set date month \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    M {			# Minute
-			append re \\s*(\\d\\d?)
-			dict set fieldSet minute [incr fieldCount]
-			append postcode "dict set date minute \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    n {			# Literal newline
-			append re \\n
-		    }
-		    O {			# Prefix for locale numerics
-			set state %O
-		    }
-		    p - P { 		# AM/PM indicator
-			set l [list [string tolower [mc AM]] 0 \
-				   [string tolower [mc PM]] 1]
-			lassign [UniquePrefixRegexp $l] regex lookup
-			append re ( $regex )
-			dict set fieldSet amPmIndicator [incr fieldCount]
-			append postcode "dict set date amPmIndicator \[" \
-			    "dict get " [list $lookup] " \[string tolower " \
-			    "\$field" \
-			    [incr captureCount] \
-			    "\]\]\n"
-		    }
-		    Q {			# Hi, Jeff!
-			append re {Stardate\s+([-+]?\d+)(\d\d\d)[.](\d)}
-			incr captureCount
-			dict set fieldSet seconds [incr fieldCount]
-			append postcode {dict set date seconds } \[ \
-			    {ParseStarDate $field} [incr captureCount] \
-			    { $field} [incr captureCount] \
-			    { $field} [incr captureCount] \
-			    \] \n
-		    }
-		    s {			# Seconds from Posix Epoch
-			# This next case is insanely difficult, because it's
-			# problematic to determine whether the field is
-			# actually within the range of a wide integer.
-			append re {\s*([-+]?\d+)}
-			dict set fieldSet seconds [incr fieldCount]
-			append postcode {dict set date seconds } \[ \
-			    {ScanWide $field} [incr captureCount] \] \n
-		    }
-		    S {			# Second
-			append re \\s*(\\d\\d?)
-			dict set fieldSet second [incr fieldCount]
-			append postcode "dict set date second \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    t {			# Literal tab character
-			append re \\t
-		    }
-		    u - w {		# Day number within week, 0 or 7 == Sun
-					# 1=Mon, 6=Sat
-			append re \\s*(\\d)
-			dict set fieldSet dayOfWeek [incr fieldCount]
-			append postcode {::scan $field} [incr captureCount] \
-			    { %d dow} \n \
-			    {
-				if { $dow == 0 } {
-				    set dow 7
-				} elseif { $dow > 7 } {
-				    return -code error \
-					-errorcode [list CLOCK badDayOfWeek] \
-					"day of week is greater than 7"
-				}
-				dict set date dayOfWeek $dow
-			    }
-		    }
-		    U {			# Week of year. The first Sunday of
-					# the year is the first day of week
-					# 01. No scan rule uses this group.
-			append re \\s*\\d\\d?
-		    }
-		    V {			# Week of ISO8601 year
-
-			append re \\s*(\\d\\d?)
-			dict set fieldSet iso8601Week [incr fieldCount]
-			append postcode "dict set date iso8601Week \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    W {			# Week of the year (00-53). The first
-					# Monday of the year is the first day
-					# of week 01. No scan rule uses this
-					# group.
-			append re \\s*\\d\\d?
-		    }
-		    y {			# Two-digit Gregorian year
-			append re \\s*(\\d\\d?)
-			dict set fieldSet yearOfCentury [incr fieldCount]
-			append postcode "dict set date yearOfCentury \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    Y {			# 4-digit Gregorian year
-			append re \\s*(\\d\\d)(\\d\\d)
-			dict set fieldSet century [incr fieldCount]
-			dict set fieldSet yearOfCentury [incr fieldCount]
-			append postcode \
-			    "dict set date century \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n" \
-			    "dict set date yearOfCentury \[" \
-			    "::scan \$field" [incr captureCount] " %d" \
-			    "\]\n"
-		    }
-		    z - Z {			# Time zone name
-			append re {(?:([-+]\d\d(?::?\d\d(?::?\d\d)?)?)|([[:alnum:]]{1,4}))}
-			dict set fieldSet tzName [incr fieldCount]
-			append postcode \
-			    {if } \{ { $field} [incr captureCount] \
-			    { ne "" } \} { } \{ \n \
-			    {dict set date tzName $field} \
-			    $captureCount \n \
-			    \} { else } \{ \n \
-			    {dict set date tzName } \[ \
-			    {ConvertLegacyTimeZone $field} \
-			    [incr captureCount] \] \n \
-			    \} \n \
-		    }
-		    % {			# Literal percent character
-			append re %
-		    }
-		    default {
-			append re %
-			if { ! [string is alnum $c] } {
-			    append re \\
-			    }
-			append re $c
-		    }
-		}
-	    }
-	    %E {
-		switch -exact -- $c {
-		    C {			# Locale-dependent era
-			set d {}
-			foreach triple [mc LOCALE_ERAS] {
-			    lassign $triple t symbol year
-			    dict set d [string tolower $symbol] $year
-			}
-			lassign [UniquePrefixRegexp $d] regex lookup
-			append re (?: $regex )
-		    }
-		    E {
-			set l {}
-			dict set l [string tolower [mc BCE]] BCE
-			dict set l [string tolower [mc CE]] CE
-			dict set l b.c.e. BCE
-			dict set l c.e. CE
-			dict set l b.c. BCE
-			dict set l a.d. CE
-			lassign [UniquePrefixRegexp $l] regex lookup
-			append re ( $regex )
-			dict set fieldSet era [incr fieldCount]
-			append postcode "dict set date era \["\
-			    "dict get " [list $lookup] \
-			    { } \[ {string tolower $field} \
-			    [incr captureCount] \] \
-			    "\]\n"
-		    }
-		    y {			# Locale-dependent year of the era
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			incr captureCount
-		    }
-		    default {
-			append re %E
-			if { ! [string is alnum $c] } {
-			    append re \\
-			    }
-			append re $c
-		    }
-		}
-		set state {}
-	    }
-	    %O {
-		switch -exact -- $c {
-		    d - e {
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			dict set fieldSet dayOfMonth [incr fieldCount]
-			append postcode "dict set date dayOfMonth \[" \
-			    "dict get " [list $lookup] " \$field" \
-			    [incr captureCount] \
-			    "\]\n"
-		    }
-		    H - k {
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			dict set fieldSet hour [incr fieldCount]
-			append postcode "dict set date hour \[" \
-			    "dict get " [list $lookup] " \$field" \
-			    [incr captureCount] \
-			    "\]\n"
-		    }
-		    I - l {
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			dict set fieldSet hourAMPM [incr fieldCount]
-			append postcode "dict set date hourAMPM \[" \
-			    "dict get " [list $lookup] " \$field" \
-			    [incr captureCount] \
-			    "\]\n"
-		    }
-		    m {
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			dict set fieldSet month [incr fieldCount]
-			append postcode "dict set date month \[" \
-			    "dict get " [list $lookup] " \$field" \
-			    [incr captureCount] \
-			    "\]\n"
-		    }
-		    M {
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			dict set fieldSet minute [incr fieldCount]
-			append postcode "dict set date minute \[" \
-			    "dict get " [list $lookup] " \$field" \
-			    [incr captureCount] \
-			    "\]\n"
-		    }
-		    S {
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			dict set fieldSet second [incr fieldCount]
-			append postcode "dict set date second \[" \
-			    "dict get " [list $lookup] " \$field" \
-			    [incr captureCount] \
-			    "\]\n"
-		    }
-		    u - w {
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			dict set fieldSet dayOfWeek [incr fieldCount]
-			append postcode "set dow \[dict get " [list $lookup] \
-			    { $field} [incr captureCount] \] \n \
-			    {
-				if { $dow == 0 } {
-				    set dow 7
-				} elseif { $dow > 7 } {
-				    return -code error \
-					-errorcode [list CLOCK badDayOfWeek] \
-					"day of week is greater than 7"
-				}
-				dict set date dayOfWeek $dow
-			    }
-		    }
-		    y {
-			lassign [LocaleNumeralMatcher $locale] regex lookup
-			append re $regex
-			dict set fieldSet yearOfCentury [incr fieldCount]
-			append postcode {dict set date yearOfCentury } \[ \
-			    {dict get } [list $lookup] { $field} \
-			    [incr captureCount] \] \n
-		    }
-		    default {
-			append re %O
-			if { ! [string is alnum $c] } {
-			    append re \\
-			    }
-			append re $c
-		    }
-		}
-		set state {}
-	    }
-	}
-    }
-
-    # Clean up any unfinished format groups
-
-    append re $state \\s*\$
-
-    # Build the procedure
-
-    set procBody {}
-    append procBody "variable ::tcl::clock::TZData" \n
-    append procBody "if \{ !\[ regexp -nocase [list $re] \$string ->"
-    for { set i 1 } { $i <= $captureCount } { incr i } {
-	append procBody " " field $i
-    }
-    append procBody "\] \} \{" \n
-    append procBody {
-	return -code error -errorcode [list CLOCK badInputString] \
-	    {input string does not match supplied format}
-    }
-    append procBody \}\n
-    append procBody "set date \[dict create\]" \n
-    append procBody {dict set date tzName $timeZone} \n
-    append procBody $postcode
-    append procBody [list set changeover [mc GREGORIAN_CHANGE_DATE]] \n
-
-    # Set up the time zone before doing anything with a default base date
-    # that might need a timezone to interpret it.
-
-    if { ![dict exists $fieldSet seconds]
-	    && ![dict exists $fieldSet starDate] } {
-	if { [dict exists $fieldSet tzName] } {
-	    append procBody {
-		set timeZone [dict get $date tzName]
-	    }
-	}
-	append procBody {
-	    ::tcl::clock::SetupTimeZone $timeZone
-	}
-    }
-
-    # Add code that gets Julian Day Number from the fields.
-
-    append procBody [MakeParseCodeFromFields $fieldSet $DateParseActions]
-
-    # Get time of day
-
-    append procBody [MakeParseCodeFromFields $fieldSet $TimeParseActions]
-
-    # Assemble seconds from the Julian day and second of the day.
-    # Convert to local time unless epoch seconds or stardate are
-    # being processed - they're always absolute
-
-    if { ![dict exists $fieldSet seconds]
-         && ![dict exists $fieldSet starDate] } {
-	append procBody {
-	    if { [dict get $date julianDay] > 5373484 } {
-		return -code error -errorcode [list CLOCK dateTooLarge] \
-		    "requested date too large to represent"
-	    }
-	    dict set date localSeconds [expr {
-		-210866803200
-		+ ( 86400 * wide([dict get $date julianDay]) )
-		+ [dict get $date secondOfDay]
-	    }]
-	}
-
-	# Finally, convert the date to local time
-
-	append procBody {
-	    set date [::tcl::clock::ConvertLocalToUTC $date[set date {}] \
-			  $TZData($timeZone) $changeover]
-	}
-    }
-
-    # Return result
-
-    append procBody {return [dict get $date seconds]} \n
-
-    proc $procName { string baseTime timeZone } $procBody
-
-    # puts [list proc $procName [list string baseTime timeZone] $procBody]
-
-    return $procName
-}
-
-#----------------------------------------------------------------------
-#
-# LocaleNumeralMatcher --
-#
-#	Composes a regexp that captures the numerals in the given locale, and
-#	a dictionary to map them to conventional numerals.
-#
-# Parameters:
-#	locale - Name of the current locale
-#
-# Results:
-#	Returns a two-element list comprising the regexp and the dictionary.
-#
-# Side effects:
-#	Caches the result.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::LocaleNumeralMatcher {l} {
-    variable LocaleNumeralCache
-
-    if { ![dict exists $LocaleNumeralCache $l] } {
-	set d {}
-	set i 0
-	set sep \(
-	foreach n [mc LOCALE_NUMERALS] {
-	    dict set d $n $i
-	    regsub -all {[^[:alnum:]]} $n \\\\& subex
-	    append re $sep $subex
-	    set sep |
-	    incr i
-	}
-	append re \)
-	dict set LocaleNumeralCache $l [list $re $d]
-    }
-    return [dict get $LocaleNumeralCache $l]
-}
-
-
-
-#----------------------------------------------------------------------
-#
-# UniquePrefixRegexp --
-#
-#	Composes a regexp that performs unique-prefix matching.  The RE
-#	matches one of a supplied set of strings, or any unique prefix
-#	thereof.
-#
-# Parameters:
-#	data - List of alternating match-strings and values.
-#	       Match-strings with distinct values are considered
-#	       distinct.
-#
-# Results:
-#	Returns a two-element list.  The first is a regexp that matches any
-#	unique prefix of any of the strings.  The second is a dictionary whose
-#	keys are match values from the regexp and whose values are the
-#	corresponding values from 'data'.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::UniquePrefixRegexp { data } {
-    # The 'successors' dictionary will contain, for each string that is a
-    # prefix of any key, all characters that may follow that prefix.  The
-    # 'prefixMapping' dictionary will have keys that are prefixes of keys and
-    # values that correspond to the keys.
-
-    set prefixMapping [dict create]
-    set successors [dict create {} {}]
 
-    # Walk the key-value pairs
-
-    foreach { key value } $data {
-	# Construct all prefixes of the key;
-
-	set prefix {}
-	foreach char [split $key {}] {
-	    set oldPrefix $prefix
-	    dict set successors $oldPrefix $char {}
-	    append prefix $char
-
-	    # Put the prefixes in the 'prefixMapping' and 'successors'
-	    # dictionaries
-
-	    dict lappend prefixMapping $prefix $value
-	    if { ![dict exists $successors $prefix] } {
-		dict set successors $prefix {}
-	    }
-	}
-    }
-
-    # Identify those prefixes that designate unique values, and those that are
-    # the full keys
-
-    set uniquePrefixMapping {}
-    dict for { key valueList } $prefixMapping {
-	if { [llength $valueList] == 1 } {
-	    dict set uniquePrefixMapping $key [lindex $valueList 0]
-	}
-    }
-    foreach { key value } $data {
-	dict set uniquePrefixMapping $key $value
+proc mcget {locale args} {
+    switch -- $locale system {
+    	set locale [GetSystemLocale]
+    } current {
+	set locale [mclocale]
     }
-
-    # Construct the re.
-
-    return [list \
-		[MakeUniquePrefixRegexp $successors $uniquePrefixMapping {}] \
-		$uniquePrefixMapping]
+    msgcat::mcget ::tcl::clock $locale {*}$args
 }
 
 #----------------------------------------------------------------------
 #
-# MakeUniquePrefixRegexp --
+# GetSystemLocale --
 #
-#	Service procedure for 'UniquePrefixRegexp' that constructs a regular
-#	expresison that matches the unique prefixes.
+#	Determines the system locale, which corresponds to "system"
+#	keyword for locale parameter of 'clock' command.
 #
 # Parameters:
-#	successors - Dictionary whose keys are all prefixes
-#		     of keys passed to 'UniquePrefixRegexp' and whose
-#		     values are dictionaries whose keys are the characters
-#		     that may follow those prefixes.
-#	uniquePrefixMapping - Dictionary whose keys are the unique
-#			      prefixes and whose values are not examined.
-#	prefixString - Current prefix being processed.
-#
-# Results:
-#	Returns a constructed regular expression that matches the set of
-#	unique prefixes beginning with the 'prefixString'.
-#
-# Side effects:
 #	None.
 #
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::MakeUniquePrefixRegexp { successors
-					  uniquePrefixMapping
-					  prefixString } {
-
-    # Get the characters that may follow the current prefix string
-
-    set schars [lsort -ascii [dict keys [dict get $successors $prefixString]]]
-    if { [llength $schars] == 0 } {
-	return {}
-    }
-
-    # If there is more than one successor character, or if the current prefix
-    # is a unique prefix, surround the generated re with non-capturing
-    # parentheses.
-
-    set re {}
-    if {
-	[dict exists $uniquePrefixMapping $prefixString]
-	|| [llength $schars] > 1
-    } then {
-	append re "(?:"
-    }
-
-    # Generate a regexp that matches the successors.
-
-    set sep ""
-    foreach { c } $schars {
-	set nextPrefix $prefixString$c
-	regsub -all {[^[:alnum:]]} $c \\\\& rechar
-	append re $sep $rechar \
-	    [MakeUniquePrefixRegexp \
-		 $successors $uniquePrefixMapping $nextPrefix]
-	set sep |
-    }
-
-    # If the current prefix is a unique prefix, make all following text
-    # optional. Otherwise, if there is more than one successor character,
-    # close the non-capturing parentheses.
-
-    if { [dict exists $uniquePrefixMapping $prefixString] } {
-	append re ")?"
-    } elseif { [llength $schars] > 1 } {
-	append re ")"
-    }
-
-    return $re
-}
-
-#----------------------------------------------------------------------
-#
-# MakeParseCodeFromFields --
-#
-#	Composes Tcl code to extract the Julian Day Number from a dictionary
-#	containing date fields.
-#
-# Parameters:
-#	dateFields -- Dictionary whose keys are fields of the date,
-#	              and whose values are the rightmost positions
-#		      at which those fields appear.
-#	parseActions -- List of triples: field set, priority, and
-#			code to emit.  Smaller priorities are better, and
-#			the list must be in ascending order by priority
-#
 # Results:
-#	Returns a burst of code that extracts the day number from the given
-#	date.
+#	Returns the system locale.
 #
 # Side effects:
-#	None.
+#	None
 #
 #----------------------------------------------------------------------
 
-proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {
+proc ::tcl::clock::GetSystemLocale {} {
+    if { $::tcl_platform(platform) ne {windows} } {
+	# On a non-windows platform, the 'system' locale is the same as
+	# the 'current' locale
 
-    set currPrio 999
-    set currFieldPos [list]
-    set currCodeBurst {
-	error "in ::tcl::clock::MakeParseCodeFromFields: can't happen"
+	return [mclocale]
     }
 
-    foreach { fieldSet prio parseAction } $parseActions {
-	# If we've found an answer that's better than any that follow, quit
-	# now.
-
-	if { $prio > $currPrio } {
-	    break
-	}
-
-	# Accumulate the field positions that are used in the current field
-	# grouping.
-
-	set fieldPos [list]
-	set ok true
-	foreach field $fieldSet {
-	    if { ! [dict exists $dateFields $field] } {
-		set ok 0
-		break
-	    }
-	    lappend fieldPos [dict get $dateFields $field]
-	}
-
-	# Quit if we don't have a complete set of fields
-	if { !$ok } {
-	    continue
-	}
+    # On a windows platform, the 'system' locale is adapted from the
+    # 'current' locale by applying the date and time formats from the
+    # Control Panel.  First, load the 'current' locale if it's not yet
+    # loaded
 
-	# Determine whether the current answer is better than the last.
+    mcpackagelocale set [mclocale]
 
-	set fPos [lsort -integer -decreasing $fieldPos]
+    # Make a new locale string for the system locale, and get the
+    # Control Panel information
 
-	if { $prio ==  $currPrio } {
-	    foreach currPos $currFieldPos newPos $fPos {
-		if {
-		    ![string is integer $newPos]
-		    || ![string is integer $currPos]
-		    || $newPos > $currPos
-		} then {
-		    break
-		}
-		if { $newPos < $currPos } {
-		    set ok 0
-		    break
-		}
-	    }
-	}
-	if { !$ok } {
-	    continue
-	}
-
-	# Remember the best possibility for extracting date information
-
-	set currPrio $prio
-	set currFieldPos $fPos
-	set currCodeBurst $parseAction
+    set locale [mclocale]_windows
+    if { ! [mcpackagelocale present $locale] } {
+	LoadWindowsDateTimeFormats $locale
     }
 
-    return $currCodeBurst
+    return $locale
 }
 
 #----------------------------------------------------------------------
@@ -2303,34 +582,14 @@ proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {
 #----------------------------------------------------------------------
 
 proc ::tcl::clock::EnterLocale { locale } {
-    if { $locale eq {system} } {
-	if { $::tcl_platform(platform) ne {windows} } {
-	    # On a non-windows platform, the 'system' locale is the same as
-	    # the 'current' locale
-
-	    set locale current
-	} else {
-	    # On a windows platform, the 'system' locale is adapted from the
-	    # 'current' locale by applying the date and time formats from the
-	    # Control Panel.  First, load the 'current' locale if it's not yet
-	    # loaded
-
-	    mcpackagelocale set [mclocale]
-
-	    # Make a new locale string for the system locale, and get the
-	    # Control Panel information
-
-	    set locale [mclocale]_windows
-	    if { ! [mcpackagelocale present $locale] } {
-		LoadWindowsDateTimeFormats $locale
-	    }
-	}
-    }
-    if { $locale eq {current}} {
+    switch -- $locale system {
+    	set locale [GetSystemLocale]
+    } current {
 	set locale [mclocale]
     }
-    # Eventually load the locale
+    # Select the locale, eventually load it
     mcpackagelocale set $locale
+    return $locale
 }
 
 #----------------------------------------------------------------------
@@ -2480,485 +739,64 @@ proc ::tcl::clock::LoadWindowsDateTimeFormats { locale } {
 #
 #----------------------------------------------------------------------
 
-proc ::tcl::clock::LocalizeFormat { locale format } {
-
-    # message catalog key to cache this format
-    set key FORMAT_$format
-
-    if { [::msgcat::mcexists -exactlocale -exactnamespace $key] } {
-	return [mc $key]
-    }
-    # Handle locale-dependent format groups by mapping them out of the format
-    # string.  Note that the order of the [string map] operations is
-    # significant because later formats can refer to later ones; for example
-    # %c can refer to %X, which in turn can refer to %T.
-
-    set list {
-	%% %%
-	%D %m/%d/%Y
-	%+ {%a %b %e %H:%M:%S %Z %Y}
-    }
-    lappend list %EY [string map $list [mc LOCALE_YEAR_FORMAT]]
-    lappend list %T  [string map $list [mc TIME_FORMAT_24_SECS]]
-    lappend list %R  [string map $list [mc TIME_FORMAT_24]]
-    lappend list %r  [string map $list [mc TIME_FORMAT_12]]
-    lappend list %X  [string map $list [mc TIME_FORMAT]]
-    lappend list %EX [string map $list [mc LOCALE_TIME_FORMAT]]
-    lappend list %x  [string map $list [mc DATE_FORMAT]]
-    lappend list %Ex [string map $list [mc LOCALE_DATE_FORMAT]]
-    lappend list %c  [string map $list [mc DATE_TIME_FORMAT]]
-    lappend list %Ec [string map $list [mc LOCALE_DATE_TIME_FORMAT]]
-    set format [string map $list $format]
-
-    ::msgcat::mcset $locale $key $format
-    return $format
-}
-
-#----------------------------------------------------------------------
-#
-# FormatNumericTimeZone --
-#
-#	Formats a time zone as +hhmmss
-#
-# Parameters:
-#	z - Time zone in seconds east of Greenwich
-#
-# Results:
-#	Returns the time zone formatted in a numeric form
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::FormatNumericTimeZone { z } {
-    if { $z < 0 } {
-	set z [expr { - $z }]
-	set retval -
-    } else {
-	set retval +
-    }
-    append retval [::format %02d [expr { $z / 3600 }]]
-    set z [expr { $z % 3600 }]
-    append retval [::format %02d [expr { $z / 60 }]]
-    set z [expr { $z % 60 }]
-    if { $z != 0 } {
-	append retval [::format %02d $z]
-    }
-    return $retval
-}
-
-#----------------------------------------------------------------------
-#
-# FormatStarDate --
-#
-#	Formats a date as a StarDate.
-#
-# Parameters:
-#	date - Dictionary containing 'year', 'dayOfYear', and
-#	       'localSeconds' fields.
-#
-# Results:
-#	Returns the given date formatted as a StarDate.
-#
-# Side effects:
-#	None.
-#
-# Jeff Hobbs put this in to support an atrocious pun about Tcl being
-# "Enterprise ready."  Now we're stuck with it.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::FormatStarDate { date } {
-    variable Roddenberry
-
-    # Get day of year, zero based
-
-    set doy [expr { [dict get $date dayOfYear] - 1 }]
+proc ::tcl::clock::LocalizeFormat { locale format {fmtkey {}} } {
+    variable LocaleFormats
+    
+    if { $fmtkey eq {} } { set fmtkey FMT_$format }
+    if { [catch {
+    	set locfmt [dict get $LocaleFormats $locale $fmtkey]
+    }] } {
 
-    # Determine whether the year is a leap year
+    	# get map list cached or build it:
+	if { [catch {
+	    set mlst [dict get $LocaleFormats $locale MLST]
+	}] } {
+	
+	    # message catalog dictionary:
+	    set mcd [mcget $locale]
+		
+	    # Handle locale-dependent format groups by mapping them out of the format
+	    # string.  Note that the order of the [string map] operations is
+	    # significant because later formats can refer to later ones; for example
+	    # %c can refer to %X, which in turn can refer to %T.
+
+	    set mlst {
+		%% %%
+		%D %m/%d/%Y
+		%+ {%a %b %e %H:%M:%S %Z %Y}
+	    }
+	    lappend mlst %EY [string map $mlst [dict get $mcd LOCALE_YEAR_FORMAT]]
+	    lappend mlst %T  [string map $mlst [dict get $mcd TIME_FORMAT_24_SECS]]
+	    lappend mlst %R  [string map $mlst [dict get $mcd TIME_FORMAT_24]]
+	    lappend mlst %r  [string map $mlst [dict get $mcd TIME_FORMAT_12]]
+	    lappend mlst %X  [string map $mlst [dict get $mcd TIME_FORMAT]]
+	    lappend mlst %EX [string map $mlst [dict get $mcd LOCALE_TIME_FORMAT]]
+	    lappend mlst %x  [string map $mlst [dict get $mcd DATE_FORMAT]]
+	    lappend mlst %Ex [string map $mlst [dict get $mcd LOCALE_DATE_FORMAT]]
+	    lappend mlst %c  [string map $mlst [dict get $mcd DATE_TIME_FORMAT]]
+	    lappend mlst %Ec [string map $mlst [dict get $mcd LOCALE_DATE_TIME_FORMAT]]
 
-    set lp [IsGregorianLeapYear $date]
+	    dict set LocaleFormats $locale MLST $mlst
+	}
 
-    # Convert day of year to a fractional year
+	# translate copy of format (don't use format object here, because otherwise 
+	# it can lose its internal representation (string map - convert to unicode)
+	set locfmt [string map $mlst [string range " $format" 1 end]]
 
-    if { $lp } {
-	set fractYear [expr { 1000 * $doy / 366 }]
-    } else {
-	set fractYear [expr { 1000 * $doy / 365 }]
+	# cache it:
+	dict set LocaleFormats $locale $fmtkey $locfmt
     }
 
-    # Put together the StarDate
-
-    return [::format "Stardate %02d%03d.%1d" \
-		[expr { [dict get $date year] - $Roddenberry }] \
-		$fractYear \
-		[expr { [dict get $date localSeconds] % 86400
-			/ ( 86400 / 10 ) }]]
-}
-
-#----------------------------------------------------------------------
-#
-# ParseStarDate --
-#
-#	Parses a StarDate
-#
-# Parameters:
-#	year - Year from the Roddenberry epoch
-#	fractYear - Fraction of a year specifiying the day of year.
-#	fractDay - Fraction of a day
-#
-# Results:
-#	Returns a count of seconds from the Posix epoch.
-#
-# Side effects:
-#	None.
-#
-# Jeff Hobbs put this in to support an atrocious pun about Tcl being
-# "Enterprise ready."  Now we're stuck with it.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::ParseStarDate { year fractYear fractDay } {
-    variable Roddenberry
-
-    # Build a tentative date from year and fraction.
-
-    set date [dict create \
-		  gregorian 1 \
-		  era CE \
-		  year [expr { $year + $Roddenberry }] \
-		  dayOfYear [expr { $fractYear * 365 / 1000 + 1 }]]
-    set date [GetJulianDayFromGregorianEraYearDay $date[set date {}]]
-
-    # Determine whether the given year is a leap year
-
-    set lp [IsGregorianLeapYear $date]
-
-    # Reconvert the fractional year according to whether the given year is a
-    # leap year
-
-    if { $lp } {
-	dict set date dayOfYear \
-	    [expr { $fractYear * 366 / 1000 + 1 }]
-    } else {
-	dict set date dayOfYear \
-	    [expr { $fractYear * 365 / 1000 + 1 }]
+    # Save original format as long as possible, because of internal 
+    # representation (performance).
+    # Note that in this case such format will be never localized (also
+    # using another locales). To prevent this return a duplicate (but 
+    # it may be slower).
+    if {$locfmt eq $format} {
+        set locfmt $format
     }
-    dict unset date julianDay
-    dict unset date gregorian
-    set date [GetJulianDayFromGregorianEraYearDay $date[set date {}]]
-
-    return [expr {
-	86400 * [dict get $date julianDay]
-	- 210866803200
-	+ ( 86400 / 10 ) * $fractDay
-    }]
-}
 
-#----------------------------------------------------------------------
-#
-# ScanWide --
-#
-#	Scans a wide integer from an input
-#
-# Parameters:
-#	str - String containing a decimal wide integer
-#
-# Results:
-#	Returns the string as a pure wide integer.  Throws an error if the
-#	string is misformatted or out of range.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::ScanWide { str } {
-    set count [::scan $str {%ld %c} result junk]
-    if { $count != 1 } {
-	return -code error -errorcode [list CLOCK notAnInteger $str] \
-	    "\"$str\" is not an integer"
-    }
-    if { [incr result 0] != $str } {
-	return -code error -errorcode [list CLOCK integervalueTooLarge] \
-	    "integer value too large to represent"
-    }
-    return $result
-}
-
-#----------------------------------------------------------------------
-#
-# InterpretTwoDigitYear --
-#
-#	Given a date that contains only the year of the century, determines
-#	the target value of a two-digit year.
-#
-# Parameters:
-#	date - Dictionary containing fields of the date.
-#	baseTime - Base time relative to which the date is expressed.
-#	twoDigitField - Name of the field that stores the two-digit year.
-#			Default is 'yearOfCentury'
-#	fourDigitField - Name of the field that will receive the four-digit
-#	                 year.  Default is 'year'
-#
-# Results:
-#	Returns the dictionary augmented with the four-digit year, stored in
-#	the given key.
-#
-# Side effects:
-#	None.
-#
-# The current rule for interpreting a two-digit year is that the year shall be
-# between 1937 and 2037, thus staying within the range of a 32-bit signed
-# value for time.  This rule may change to a sliding window in future
-# versions, so the 'baseTime' parameter (which is currently ignored) is
-# provided in the procedure signature.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::InterpretTwoDigitYear { date baseTime
-					   { twoDigitField yearOfCentury }
-					   { fourDigitField year } } {
-    set yr [dict get $date $twoDigitField]
-    if { $yr <= 37 } {
-	dict set date $fourDigitField [expr { $yr + 2000 }]
-    } else {
-	dict set date $fourDigitField [expr { $yr + 1900 }]
-    }
-    return $date
-}
-
-#----------------------------------------------------------------------
-#
-# AssignBaseYear --
-#
-#	Places the number of the current year into a dictionary.
-#
-# Parameters:
-#	date - Dictionary value to update
-#	baseTime - Base time from which to extract the year, expressed
-#		   in seconds from the Posix epoch
-#	timezone - the time zone in which the date is being scanned
-#	changeover - the Julian Day on which the Gregorian calendar
-#		     was adopted in the target locale.
-#
-# Results:
-#	Returns the dictionary with the current year assigned.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::AssignBaseYear { date baseTime timezone changeover } {
-    variable TZData
-
-    # Find the Julian Day Number corresponding to the base time, and
-    # find the Gregorian year corresponding to that Julian Day.
-
-    set date2 [GetDateFields $baseTime $TZData($timezone) $changeover]
-
-    # Store the converted year
-
-    dict set date era [dict get $date2 era]
-    dict set date year [dict get $date2 year]
-
-    return $date
-}
-
-#----------------------------------------------------------------------
-#
-# AssignBaseIso8601Year --
-#
-#	Determines the base year in the ISO8601 fiscal calendar.
-#
-# Parameters:
-#	date - Dictionary containing the fields of the date that
-#	       is to be augmented with the base year.
-#	baseTime - Base time expressed in seconds from the Posix epoch.
-#	timeZone - Target time zone
-#	changeover - Julian Day of adoption of the Gregorian calendar in
-#		     the target locale.
-#
-# Results:
-#	Returns the given date with "iso8601Year" set to the
-#	base year.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::AssignBaseIso8601Year {date baseTime timeZone changeover} {
-    variable TZData
-
-    # Find the Julian Day Number corresponding to the base time
-
-    set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]
-
-    # Calculate the ISO8601 date and transfer the year
-
-    dict set date era CE
-    dict set date iso8601Year [dict get $date2 iso8601Year]
-    return $date
-}
-
-#----------------------------------------------------------------------
-#
-# AssignBaseMonth --
-#
-#	Places the number of the current year and month into a
-#	dictionary.
-#
-# Parameters:
-#	date - Dictionary value to update
-#	baseTime - Time from which the year and month are to be
-#	           obtained, expressed in seconds from the Posix epoch.
-#	timezone - Name of the desired time zone
-#	changeover - Julian Day on which the Gregorian calendar was adopted.
-#
-# Results:
-#	Returns the dictionary with the base year and month assigned.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::AssignBaseMonth {date baseTime timezone changeover} {
-    variable TZData
-
-    # Find the year and month corresponding to the base time
-
-    set date2 [GetDateFields $baseTime $TZData($timezone) $changeover]
-    dict set date era [dict get $date2 era]
-    dict set date year [dict get $date2 year]
-    dict set date month [dict get $date2 month]
-    return $date
-}
-
-#----------------------------------------------------------------------
-#
-# AssignBaseWeek --
-#
-#	Determines the base year and week in the ISO8601 fiscal calendar.
-#
-# Parameters:
-#	date - Dictionary containing the fields of the date that
-#	       is to be augmented with the base year and week.
-#	baseTime - Base time expressed in seconds from the Posix epoch.
-#	changeover - Julian Day on which the Gregorian calendar was adopted
-#		     in the target locale.
-#
-# Results:
-#	Returns the given date with "iso8601Year" set to the
-#	base year and "iso8601Week" to the week number.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::AssignBaseWeek {date baseTime timeZone changeover} {
-    variable TZData
-
-    # Find the Julian Day Number corresponding to the base time
-
-    set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]
-
-    # Calculate the ISO8601 date and transfer the year
-
-    dict set date era CE
-    dict set date iso8601Year [dict get $date2 iso8601Year]
-    dict set date iso8601Week [dict get $date2 iso8601Week]
-    return $date
-}
-
-#----------------------------------------------------------------------
-#
-# AssignBaseJulianDay --
-#
-#	Determines the base day for a time-of-day conversion.
-#
-# Parameters:
-#	date - Dictionary that is to get the base day
-#	baseTime - Base time expressed in seconds from the Posix epoch
-#	changeover - Julian day on which the Gregorian calendar was
-#		     adpoted in the target locale.
-#
-# Results:
-#	Returns the given dictionary augmented with a 'julianDay' field
-#	that contains the base day.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::AssignBaseJulianDay { date baseTime timeZone changeover } {
-    variable TZData
-
-    # Find the Julian Day Number corresponding to the base time
-
-    set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]
-    dict set date julianDay [dict get $date2 julianDay]
-
-    return $date
-}
-
-#----------------------------------------------------------------------
-#
-# InterpretHMSP --
-#
-#	Interprets a time in the form "hh:mm:ss am".
-#
-# Parameters:
-#	date -- Dictionary containing "hourAMPM", "minute", "second"
-#	        and "amPmIndicator" fields.
-#
-# Results:
-#	Returns the number of seconds from local midnight.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::InterpretHMSP { date } {
-    set hr [dict get $date hourAMPM]
-    if { $hr == 12 } {
-	set hr 0
-    }
-    if { [dict get $date amPmIndicator] } {
-	incr hr 12
-    }
-    dict set date hour $hr
-    return [InterpretHMS $date[set date {}]]
-}
-
-#----------------------------------------------------------------------
-#
-# InterpretHMS --
-#
-#	Interprets a 24-hour time "hh:mm:ss"
-#
-# Parameters:
-#	date -- Dictionary containing the "hour", "minute" and "second"
-#	        fields.
-#
-# Results:
-#	Returns the given dictionary augmented with a "secondOfDay"
-#	field containing the number of seconds from local midnight.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::InterpretHMS { date } {
-    return [expr {
-	( [dict get $date hour] * 60
-	  + [dict get $date minute] ) * 60
-	+ [dict get $date second]
-    }]
+    return $locfmt
 }
 
 #----------------------------------------------------------------------
@@ -2975,13 +813,12 @@ proc ::tcl::clock::InterpretHMS { date } {
 #	Returns the system time zone.
 #
 # Side effects:
-#	Stores the sustem time zone in the 'CachedSystemTimeZone'
-#	variable, since determining it may be an expensive process.
+#	Stores the sustem time zone in engine configuration, since
+#	determining it may be an expensive process.
 #
 #----------------------------------------------------------------------
 
 proc ::tcl::clock::GetSystemTimeZone {} {
-    variable CachedSystemTimeZone
     variable TimeZoneBad
 
     if {[set result [getenv TCL_TZ]] ne {}} {
@@ -2990,61 +827,33 @@ proc ::tcl::clock::GetSystemTimeZone {} {
 	set timezone $result
     }
     if {![info exists timezone]} {
-        # Cache the time zone only if it was detected by one of the
-        # expensive methods.
-        if { [info exists CachedSystemTimeZone] } {
-            set timezone $CachedSystemTimeZone
-        } elseif { $::tcl_platform(platform) eq {windows} } {
-            set timezone [GuessWindowsTimeZone]
-        } elseif { [file exists /etc/localtime]
-                   && ![catch {ReadZoneinfoFile \
-                                   Tcl/Localtime /etc/localtime}] } {
-            set timezone :Tcl/Localtime
-        } else {
-            set timezone :localtime
+        # ask engine for the cached timezone:
+        set timezone [configure -system-tz]
+        if { $timezone ne "" } {
+            return $timezone
         }
-	set CachedSystemTimeZone $timezone
+	if { $::tcl_platform(platform) eq {windows} } {
+	    set timezone [GuessWindowsTimeZone]
+	} elseif { [file exists /etc/localtime]
+	           && ![catch {ReadZoneinfoFile \
+	                           Tcl/Localtime /etc/localtime}] } {
+	    set timezone :Tcl/Localtime
+	} else {
+	    set timezone :localtime
+	}
     }
     if { ![dict exists $TimeZoneBad $timezone] } {
-	dict set TimeZoneBad $timezone [catch {SetupTimeZone $timezone}]
+	catch {set timezone [SetupTimeZone $timezone]}
     }
-    if { [dict get $TimeZoneBad $timezone] } {
-	return :localtime
-    } else {
-	return $timezone
-    }
-}
 
-#----------------------------------------------------------------------
-#
-# ConvertLegacyTimeZone --
-#
-#	Given an alphanumeric time zone identifier and the system time zone,
-#	convert the alphanumeric identifier to an unambiguous time zone.
-#
-# Parameters:
-#	tzname - Name of the time zone to convert
-#
-# Results:
-#	Returns a time zone name corresponding to tzname, but in an
-#	unambiguous form, generally +hhmm.
-#
-# This procedure is implemented primarily to allow the parsing of RFC822
-# date/time strings.  Processing a time zone name on input is not recommended
-# practice, because there is considerable room for ambiguity; for instance, is
-# BST Brazilian Standard Time, or British Summer Time?
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::ConvertLegacyTimeZone { tzname } {
-    variable LegacyTimeZone
-
-    set tzname [string tolower $tzname]
-    if { ![dict exists $LegacyTimeZone $tzname] } {
-	return -code error -errorcode [list CLOCK badTZName $tzname] \
-	    "time zone \"$tzname\" not found"
+    if { [dict exists $TimeZoneBad $timezone] } {
+	set timezone :localtime
     }
-    return [dict get $LegacyTimeZone $tzname]
+    
+    # tell backend - current system timezone:
+    configure -system-tz $timezone
+
+    return $timezone
 }
 
 #----------------------------------------------------------------------
@@ -3064,10 +873,17 @@ proc ::tcl::clock::ConvertLegacyTimeZone { tzname } {
 #
 #----------------------------------------------------------------------
 
-proc ::tcl::clock::SetupTimeZone { timezone } {
+proc ::tcl::clock::SetupTimeZone { timezone {alias {}} } {
     variable TZData
 
     if {! [info exists TZData($timezone)] } {
+
+    	variable TimeZoneBad
+	if { [dict exists $TimeZoneBad $timezone] } {
+	    return -code error \
+		-errorcode [list CLOCK badTimeZone $timezone] \
+		"time zone \"$timezone\" not found"
+	}
 	variable MINWIDE
 	if { $timezone eq {:localtime} } {
 	    # Nothing to do, we'll convert using the localtime function
@@ -3105,6 +921,7 @@ proc ::tcl::clock::SetupTimeZone { timezone } {
 		    LoadZoneinfoFile [string range $timezone 1 end]
 		}]
 	    } then {
+	    	dict set TimeZoneBad $timezone 1
 		return -code error \
 		    -errorcode [list CLOCK badTimeZone $timezone] \
 		    "time zone \"$timezone\" not found"
@@ -3116,25 +933,43 @@ proc ::tcl::clock::SetupTimeZone { timezone } {
 		if { [lindex [dict get $opts -errorcode] 0] eq {CLOCK} } {
 		    dict unset opts -errorinfo
 		}
+		dict set TimeZoneBad $timezone 1
 		return -options $opts $data
 	    } else {
 		set TZData($timezone) $data
 	    }
 
 	} else {
+
+	    variable LegacyTimeZone
+
 	    # We couldn't parse this as a POSIX time zone.  Try again with a
 	    # time zone file - this time without a colon
 
 	    if { [catch { LoadTimeZoneFile $timezone }]
 		 && [catch { LoadZoneinfoFile $timezone } - opts] } {
+
+		# Check may be a legacy zone:
+
+		if { $alias eq {} && ![catch {
+		    set tzname [dict get $LegacyTimeZone [string tolower $timezone]]
+		}] } {
+		    set tzname [::tcl::clock::SetupTimeZone $tzname $timezone]
+		    set TZData($timezone) $TZData($tzname)
+		    # tell backend - timezone is initialized and return shared timezone object:
+		    return [configure -setup-tz $timezone]
+		}
+
 		dict unset opts -errorinfo
+		dict set TimeZoneBad $timezone 1
 		return -options $opts "time zone $timezone not found"
 	    }
 	    set TZData($timezone) $TZData(:$timezone)
 	}
     }
 
-    return
+    # tell backend - timezone is initialized and return shared timezone object:
+    configure -setup-tz $timezone
 }
 
 #----------------------------------------------------------------------
@@ -3205,12 +1040,12 @@ proc ::tcl::clock::GuessWindowsTimeZone {} {
     if { [dict exists $WinZoneInfo $data] } {
 	set tzname [dict get $WinZoneInfo $data]
 	if { ! [dict exists $TimeZoneBad $tzname] } {
-	    dict set TimeZoneBad $tzname [catch {SetupTimeZone $tzname}]
+	    catch {set tzname [SetupTimeZone $tzname]}
 	}
     } else {
 	set tzname {}
     }
-    if { $tzname eq {} || [dict get $TimeZoneBad $tzname] } {
+    if { $tzname eq {} || [dict exists $TimeZoneBad $tzname] } {
 	lassign $data \
 	    bias stdBias dstBias \
 	    stdYear stdMonth stdDayOfWeek stdDayOfMonth \
@@ -3937,43 +1772,6 @@ proc ::tcl::clock::DeterminePosixDSTTime { z bound y } {
 
 #----------------------------------------------------------------------
 #
-# GetLocaleEra --
-#
-#	Given local time expressed in seconds from the Posix epoch,
-#	determine localized era and year within the era.
-#
-# Parameters:
-#	date - Dictionary that must contain the keys, 'localSeconds',
-#	       whose value is expressed as the appropriate local time;
-#	       and 'year', whose value is the Gregorian year.
-#	etable - Value of the LOCALE_ERAS key in the message catalogue
-#	         for the target locale.
-#
-# Results:
-#	Returns the dictionary, augmented with the keys, 'localeEra' and
-#	'localeYear'.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::GetLocaleEra { date etable } {
-    set index [BSearch $etable [dict get $date localSeconds]]
-    if { $index < 0} {
-	dict set date localeEra \
-	    [::format %02d [expr { [dict get $date year] / 100 }]]
-	dict set date localeYear [expr {
-	    [dict get $date year] % 100
-	}]
-    } else {
-	dict set date localeEra [lindex $etable $index 1]
-	dict set date localeYear [expr {
-	    [dict get $date year] - [lindex $etable $index 2]
-	}]
-    }
-    return $date
-}
-
-#----------------------------------------------------------------------
-#
 # GetJulianDayFromEraYearDay --
 #
 #	Given a year, month and day on the Gregorian calendar, determines
@@ -4151,331 +1949,6 @@ proc ::tcl::clock::WeekdayOnOrBefore { weekday j } {
 
 #----------------------------------------------------------------------
 #
-# BSearch --
-#
-#	Service procedure that does binary search in several places inside the
-#	'clock' command.
-#
-# Parameters:
-#	list - List of lists, sorted in ascending order by the
-#	       first elements
-#	key - Value to search for
-#
-# Results:
-#	Returns the index of the greatest element in $list that is less than
-#	or equal to $key.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::BSearch { list key } {
-    if {[llength $list] == 0} {
-	return -1
-    }
-    if { $key < [lindex $list 0 0] } {
-	return -1
-    }
-
-    set l 0
-    set u [expr { [llength $list] - 1 }]
-
-    while { $l < $u } {
-	# At this point, we know that
-	#   $k >= [lindex $list $l 0]
-	#   Either $u == [llength $list] or else $k < [lindex $list $u+1 0]
-	# We find the midpoint of the interval {l,u} rounded UP, compare
-	# against it, and set l or u to maintain the invariant.  Note that the
-	# interval shrinks at each step, guaranteeing convergence.
-
-	set m [expr { ( $l + $u + 1 ) / 2 }]
-	if { $key >= [lindex $list $m 0] } {
-	    set l $m
-	} else {
-	    set u [expr { $m - 1 }]
-	}
-    }
-
-    return $l
-}
-
-#----------------------------------------------------------------------
-#
-# clock add --
-#
-#	Adds an offset to a given time.
-#
-# Syntax:
-#	clock add clockval ?count unit?... ?-option value?
-#
-# Parameters:
-#	clockval -- Starting time value
-#	count -- Amount of a unit of time to add
-#	unit -- Unit of time to add, must be one of:
-#			years year months month weeks week
-#			days day hours hour minutes minute
-#			seconds second
-#
-# Options:
-#	-gmt BOOLEAN
-#		(Deprecated) Flag synonymous with '-timezone :GMT'
-#	-timezone ZONE
-#		Name of the time zone in which calculations are to be done.
-#	-locale NAME
-#		Name of the locale in which calculations are to be done.
-#		Used to determine the Gregorian change date.
-#
-# Results:
-#	Returns the given time adjusted by the given offset(s) in
-#	order.
-#
-# Notes:
-#	It is possible that adding a number of months or years will adjust the
-#	day of the month as well.  For instance, the time at one month after
-#	31 January is either 28 or 29 February, because February has fewer
-#	than 31 days.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::add { clockval args } {
-    if { [llength $args] % 2 != 0 } {
-	set cmdName "clock add"
-	return -code error \
-	    -errorcode [list CLOCK wrongNumArgs] \
-	    "wrong \# args: should be\
-             \"$cmdName clockval ?number units?...\
-             ?-gmt boolean? ?-locale LOCALE? ?-timezone ZONE?\""
-    }
-    if { [catch { expr {wide($clockval)} } result] } {
-	return -code error $result
-    }
-
-    set offsets {}
-    set gmt 0
-    set locale c
-    set timezone [GetSystemTimeZone]
-
-    foreach { a b } $args {
-	if { [string is integer -strict $a] } {
-	    lappend offsets $a $b
-	} else {
-	    switch -exact -- $a {
-		-g - -gm - -gmt {
-		    set gmt $b
-		}
-		-l - -lo - -loc - -loca - -local - -locale {
-		    set locale [string tolower $b]
-		}
-		-t - -ti - -tim - -time - -timez - -timezo - -timezon -
-		-timezone {
-		    set timezone $b
-		}
-		default {
-		    throw [list CLOCK badOption $a] \
-			"bad option \"$a\",\
-                         must be -gmt, -locale or -timezone"
-		}
-	    }
-	}
-    }
-
-    # Check options for validity
-
-    if { [info exists saw(-gmt)] && [info exists saw(-timezone)] } {
-	return -code error \
-	    -errorcode [list CLOCK gmtWithTimezone] \
-	    "cannot use -gmt and -timezone in same call"
-    }
-    if { [catch { expr { wide($clockval) } } result] } {
-	return -code error "expected integer but got \"$clockval\""
-    }
-    if { ![string is boolean -strict $gmt] } {
-	return -code error "expected boolean value but got \"$gmt\""
-    } elseif { $gmt } {
-	set timezone :GMT
-    }
-
-    EnterLocale $locale
-
-    set changeover [mc GREGORIAN_CHANGE_DATE]
-
-    if {[catch {SetupTimeZone $timezone} retval opts]} {
-	dict unset opts -errorinfo
-	return -options $opts $retval
-    }
-
-    try {
-	foreach { quantity unit } $offsets {
-	    switch -exact -- $unit {
-		years - year {
-		    set clockval [AddMonths [expr { 12 * $quantity }] \
-			    $clockval $timezone $changeover]
-		}
-		months - month {
-		    set clockval [AddMonths $quantity $clockval $timezone \
-			    $changeover]
-		}
-
-		weeks - week {
-		    set clockval [AddDays [expr { 7 * $quantity }] \
-			    $clockval $timezone $changeover]
-		}
-		days - day {
-		    set clockval [AddDays $quantity $clockval $timezone \
-			    $changeover]
-		}
-
-		hours - hour {
-		    set clockval [expr { 3600 * $quantity + $clockval }]
-		}
-		minutes - minute {
-		    set clockval [expr { 60 * $quantity + $clockval }]
-		}
-		seconds - second {
-		    set clockval [expr { $quantity + $clockval }]
-		}
-
-		default {
-		    throw [list CLOCK badUnit $unit] \
-			"unknown unit \"$unit\", must be \
-                        years, months, weeks, days, hours, minutes or seconds"
-		}
-	    }
-	}
-	return $clockval
-    } trap CLOCK {result opts} {
-	# Conceal the innards of [clock] when it's an expected error
-	dict unset opts -errorinfo
-	return -options $opts $result
-    }
-}
-
-#----------------------------------------------------------------------
-#
-# AddMonths --
-#
-#	Add a given number of months to a given clock value in a given
-#	time zone.
-#
-# Parameters:
-#	months - Number of months to add (may be negative)
-#	clockval - Seconds since the epoch before the operation
-#	timezone - Time zone in which the operation is to be performed
-#
-# Results:
-#	Returns the new clock value as a number of seconds since
-#	the epoch.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::AddMonths { months clockval timezone changeover } {
-    variable DaysInRomanMonthInCommonYear
-    variable DaysInRomanMonthInLeapYear
-    variable TZData
-
-    # Convert the time to year, month, day, and fraction of day.
-
-    set date [GetDateFields $clockval $TZData($timezone) $changeover]
-    dict set date secondOfDay [expr {
-	[dict get $date localSeconds] % 86400
-    }]
-    dict set date tzName $timezone
-
-    # Add the requisite number of months
-
-    set m [dict get $date month]
-    incr m $months
-    incr m -1
-    set delta [expr { $m / 12 }]
-    set mm [expr { $m % 12 }]
-    dict set date month [expr { $mm + 1 }]
-    dict incr date year $delta
-
-    # If the date doesn't exist in the current month, repair it
-
-    if { [IsGregorianLeapYear $date] } {
-	set hath [lindex $DaysInRomanMonthInLeapYear $mm]
-    } else {
-	set hath [lindex $DaysInRomanMonthInCommonYear $mm]
-    }
-    if { [dict get $date dayOfMonth] > $hath } {
-	dict set date dayOfMonth $hath
-    }
-
-    # Reconvert to a number of seconds
-
-    set date [GetJulianDayFromEraYearMonthDay \
-		  $date[set date {}]\
-		  $changeover]
-    dict set date localSeconds [expr {
-	-210866803200
-	+ ( 86400 * wide([dict get $date julianDay]) )
-	+ [dict get $date secondOfDay]
-    }]
-    set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) \
-		 $changeover]
-
-    return [dict get $date seconds]
-
-}
-
-#----------------------------------------------------------------------
-#
-# AddDays --
-#
-#	Add a given number of days to a given clock value in a given time
-#	zone.
-#
-# Parameters:
-#	days - Number of days to add (may be negative)
-#	clockval - Seconds since the epoch before the operation
-#	timezone - Time zone in which the operation is to be performed
-#	changeover - Julian Day on which the Gregorian calendar was adopted
-#		     in the target locale.
-#
-# Results:
-#	Returns the new clock value as a number of seconds since the epoch.
-#
-# Side effects:
-#	None.
-#
-#----------------------------------------------------------------------
-
-proc ::tcl::clock::AddDays { days clockval timezone changeover } {
-    variable TZData
-
-    # Convert the time to Julian Day
-
-    set date [GetDateFields $clockval $TZData($timezone) $changeover]
-    dict set date secondOfDay [expr {
-	[dict get $date localSeconds] % 86400
-    }]
-    dict set date tzName $timezone
-
-    # Add the requisite number of days
-
-    dict incr date julianDay $days
-
-    # Reconvert to a number of seconds
-
-    dict set date localSeconds [expr {
-	-210866803200
-	+ ( 86400 * wide([dict get $date julianDay]) )
-	+ [dict get $date secondOfDay]
-    }]
-    set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) \
-		  $changeover]
-
-    return [dict get $date seconds]
-
-}
-
-#----------------------------------------------------------------------
-#
 # ChangeCurrentLocale --
 #
 #        The global locale was changed within msgcat.
@@ -4493,10 +1966,11 @@ proc ::tcl::clock::AddDays { days clockval timezone changeover } {
 #----------------------------------------------------------------------
 
 proc ::tcl::clock::ChangeCurrentLocale {args} {
+
+    configure -default-locale [lindex $args 0]
+
     variable FormatProc
     variable LocaleNumeralCache
-    variable CachedSystemTimeZone
-    variable TimeZoneBad
 
     foreach p [info procs [namespace current]::scanproc'*'current] {
         rename $p {}
@@ -4528,10 +2002,16 @@ proc ::tcl::clock::ChangeCurrentLocale {args} {
 
 proc ::tcl::clock::ClearCaches {} {
     variable FormatProc
+    variable LocaleFormats
     variable LocaleNumeralCache
-    variable CachedSystemTimeZone
     variable TimeZoneBad
 
+    # tell backend - should invalidate:
+    configure -clear
+
+    # clear msgcat cache:
+    msgcat::ClearCaches ::tcl::clock
+
     foreach p [info procs [namespace current]::scanproc'*] {
 	rename $p {}
     }
@@ -4539,9 +2019,9 @@ proc ::tcl::clock::ClearCaches {} {
 	rename $p {}
     }
 
-    catch {unset FormatProc}
+    unset -nocomplain FormatProc
+    set LocaleFormats {}
     set LocaleNumeralCache {}
-    catch {unset CachedSystemTimeZone}
     set TimeZoneBad {}
     InitTZData
 }
diff --git a/library/init.tcl b/library/init.tcl
index a202054..de69730 100644
--- a/library/init.tcl
+++ b/library/init.tcl
@@ -45,6 +45,7 @@ if {![info exists auto_path]} {
 	set auto_path ""
     }
 }
+
 namespace eval tcl {
     variable Dir
     foreach Dir [list $::tcl_library [file dirname $::tcl_library]] {
@@ -66,12 +67,12 @@ namespace eval tcl {
     }
 
     if {![interp issafe]} {
-        variable Path [encoding dirs]
-        set Dir [file join $::tcl_library encoding]
-        if {$Dir ni $Path} {
+	variable Path [encoding dirs]
+	set Dir [file join $::tcl_library encoding]
+	if {$Dir ni $Path} {
 	    lappend Path $Dir
 	    encoding dirs $Path
-        }
+	}
     }
 
     # TIP #255 min and max functions
@@ -155,6 +156,17 @@ if {(![interp issafe]) && ($tcl_platform(platform) eq "windows")} {
 if {[interp issafe]} {
     package unknown {::tcl::tm::UnknownHandler ::tclPkgUnknown}
 } else {
+    # Default known auto_index (avoid loading auto index implicit after interp create):
+    
+    array set ::auto_index {
+	::tcl::tm::UnknownHandler {source [info library]/tm.tcl}
+	::tclPkgUnknown {source [info library]/package.tcl}
+	::history {source [info library]/history.tcl}
+    }
+
+    # The newest possibility to load whole namespace:
+    array set ::auto_index_ns {}
+
     # Set up search for Tcl Modules (TIP #189).
     # and setup platform specific unknown package handlers
     if {$tcl_platform(os) eq "Darwin"
@@ -167,22 +179,21 @@ if {[interp issafe]} {
 
     # Set up the 'clock' ensemble
 
-    namespace eval ::tcl::clock [list variable TclLibDir $::tcl_library]
-
-    proc ::tcl::initClock {} {
-	# Auto-loading stubs for 'clock.tcl'
-
-	foreach cmd {add format scan} {
-	    proc ::tcl::clock::$cmd args {
-		variable TclLibDir
-		source -encoding utf-8 [file join $TclLibDir clock.tcl]
-		return [uplevel 1 [info level 0]]
-	    }
+    proc clock args {
+	set cmdmap [dict create]
+	foreach cmd {add clicks format microseconds milliseconds scan seconds configure} {
+	    dict set cmdmap $cmd ::tcl::clock::$cmd
 	}
+	namespace inscope ::tcl::clock [list namespace ensemble create -command \
+	    [uplevel 1 [list ::namespace origin [::lindex [info level 0] 0]]] \
+	    -map $cmdmap -compile 1]
 
-	rename ::tcl::initClock {}
+	uplevel 1 [info level 0]
     }
-    ::tcl::initClock
+    # Auto-loading stubs for 'clock.tcl'
+    set ::auto_index_ns(::tcl::clock) {::namespace inscope ::tcl::clock {
+	::source -encoding utf-8 [::file join [info library] clock.tcl]
+    }}
 }
 
 # Conditionalize for presence of exec.
@@ -410,18 +421,22 @@ proc unknown args {
 #                       for instance. If not given, namespace current is used.
 
 proc auto_load {cmd {namespace {}}} {
-    global auto_index auto_path
+    global auto_index auto_index_ns auto_path
 
+    # qualify names:
     if {$namespace eq ""} {
 	set namespace [uplevel 1 [list ::namespace current]]
     }
     set nameList [auto_qualify $cmd $namespace]
     # workaround non canonical auto_index entries that might be around
     # from older auto_mkindex versions
-    lappend nameList $cmd
-    foreach name $nameList {
+    if {$cmd ni $nameList} {lappend nameList $cmd}
+    
+    # try to load (and create sub-cmd handler "_sub_load_cmd" for further usage):
+    foreach name $nameList [set _sub_load_cmd {
+    	# via auto_index:
 	if {[info exists auto_index($name)]} {
-	    namespace eval :: $auto_index($name)
+	    namespace inscope :: $auto_index($name)
 	    # There's a couple of ways to look for a command of a given
 	    # name.  One is to use
 	    #    info commands $name
@@ -433,22 +448,31 @@ proc auto_load {cmd {namespace {}}} {
 		return 1
 	    }
 	}
-    }
+	# via auto_index_ns - resolver for the whole namespace loaders
+	if {[set ns [::namespace qualifiers $name]] ni {"" "::"} &&
+	    [info exists auto_index_ns($ns)]
+	} {
+	    # remove handler before loading (prevents several self-recursion cases):
+	    set ldr $auto_index_ns($ns); unset auto_index_ns($ns)
+	    namespace inscope :: $ldr
+	    # if got it:
+	    if {[namespace which -command $name] ne ""} {
+		return 1
+	    }
+	}
+    }]
+    
+    # load auto_index if possible:
     if {![info exists auto_path]} {
 	return 0
     }
-
     if {![auto_load_index]} {
 	return 0
     }
-    foreach name $nameList {
-	if {[info exists auto_index($name)]} {
-	    namespace eval :: $auto_index($name)
-	    if {[namespace which -command $name] ne ""} {
-		return 1
-	    }
-	}
-    }
+
+    # try again (something new could be loaded):
+    foreach name $nameList $_sub_load_cmd
+
     return 0
 }
 
@@ -595,12 +619,12 @@ proc auto_import {pattern} {
     auto_load_index
 
     foreach pattern $patternList {
-        foreach name [array names auto_index $pattern] {
-            if {([namespace which -command $name] eq "")
+	foreach name [array names auto_index $pattern] {
+	    if {([namespace which -command $name] eq "")
 		    && ([namespace qualifiers $pattern] eq [namespace qualifiers $name])} {
-                namespace eval :: $auto_index($name)
-            }
-        }
+		namespace inscope :: $auto_index($name)
+	    }
+	}
     }
 }
 
diff --git a/library/msgcat/msgcat.tcl b/library/msgcat/msgcat.tcl
index 928474d..f9f57db 100644
--- a/library/msgcat/msgcat.tcl
+++ b/library/msgcat/msgcat.tcl
@@ -225,6 +225,65 @@ proc msgcat::mc {src args} {
     }
 }
 
+# msgcat::mcget --
+#
+#	Return the translation for the given string based on the given
+#	locale setting or the whole dictionary object of the package/locale.
+#	Searching of catalog is similar to "msgcat::mc".
+#
+#	Contrary to "msgcat::mc" may additionally load a package catalog 
+#	on demand.
+#
+# Arguments:
+#	ns	The package namespace (as catalog selector).
+#	loc	The locale used for translation.
+#	{src}	The string to translate.
+#	{args}	Args to pass to the format command
+#
+# Results:
+#	Returns the translated string.  Propagates errors thrown by the
+#	format command.
+
+proc msgcat::mcget {ns loc args} {
+    if {$loc eq {C}} {
+	set loclist [PackagePreferences $ns]
+	set loc [lindex $loclist 0]
+    } else {
+    	set loc [string tolower $loc]
+	variable PackageConfig
+	# get locales list for given locale (de_de -> {de_de de {}})
+	if {[catch {
+	    set loclist [dict get $PackageConfig locales $ns $loc]
+	}]} {
+	    # lazy load catalog on demand
+	    mcpackagelocale load $loc $ns
+	    set loclist [dict get $PackageConfig locales $ns $loc]
+	}
+    }
+    if {![llength $args]} {
+	# get whole catalog:
+	return [msgcat::Merge $ns $loclist]
+    }
+    set src [lindex $args 0]
+    # search translation for each locale (regarding parent namespaces)
+    for {set nscur $ns} {$nscur != ""} {set nscur [namespace parent $nscur]} {
+	foreach loc $loclist {
+	    set msgs [mcget $nscur $loc]
+	    if {![catch { set val [dict get $msgs $src] }]} {
+		if {[llength $args] == 1} {
+		    return $val
+		}
+		return [format $val {*}[lrange $args 1 end]]
+	    }
+	}
+    }
+    # no translation :
+    if {[llength $args] == 1} {
+	return $src
+    }
+    return [format $src {*}[lrange $args 1 end]]
+}
+
 # msgcat::mcexists --
 #
 #	Check if a catalog item is set or if mc would invoke mcunknown.
@@ -415,6 +474,10 @@ proc msgcat::mcloadedlocales {subcommand} {
 #	    items, if the former locale was the default locale.
 #	    Returns the normalized set locale.
 #	    The default locale is taken, if locale is not given.
+#	load
+#	    Load a package locale without set it (lazy loading from mcget).
+#	    Returns the normalized set locale.
+#	    The default locale is taken, if locale is not given.
 #	get
 #	    Get the locale valid for this package.
 #	isset
@@ -442,7 +505,7 @@ proc msgcat::mcloadedlocales {subcommand} {
 # Results:
 #	Empty string, if not stated differently for the subcommand
 
-proc msgcat::mcpackagelocale {subcommand {locale ""}} {
+proc msgcat::mcpackagelocale {subcommand {locale ""} {ns ""}} {
     # todo: implement using an ensemble
     variable Loclist
     variable LoadedLocales
@@ -462,7 +525,9 @@ proc msgcat::mcpackagelocale {subcommand {locale ""}} {
 	}
         set locale [string tolower $locale]
     }
-    set ns [uplevel 1 {::namespace current}]
+    if {$ns eq ""} {
+	set ns [uplevel 1 {::namespace current}]
+    }
 
     switch -exact -- $subcommand {
 	get { return [lindex [PackagePreferences $ns] 0] }
@@ -470,7 +535,7 @@ proc msgcat::mcpackagelocale {subcommand {locale ""}} {
 	loaded { return [PackageLocales $ns] }
 	present { return [expr {$locale in [PackageLocales $ns]} ]}
 	isset { return [dict exists $PackageConfig loclist $ns] }
-	set { # set a package locale or add a package locale
+	set - load { # set a package locale or add a package locale
 
 	    # Copy the default locale if no package locale set so far
 	    if {![dict exists $PackageConfig loclist $ns]} {
@@ -480,17 +545,21 @@ proc msgcat::mcpackagelocale {subcommand {locale ""}} {
 
 	    # Check if changed
 	    set loclist [dict get $PackageConfig loclist $ns]
-	    if {! [info exists locale] || $locale eq [lindex $loclist 0] } {
+	    if {[llength [info level 0]] == 2 || $locale eq [lindex $loclist 0] } {
 		return [lindex $loclist 0]
 	    }
 
 	    # Change loclist
 	    set loclist [GetPreferences $locale]
 	    set locale [lindex $loclist 0]
-	    dict set PackageConfig loclist $ns $loclist
+	    if {$subcommand eq {set}} {
+		# set loclist
+		dict set PackageConfig loclist $ns $loclist
+	    }
 
 	    # load eventual missing locales
 	    set loadedLocales [dict get $PackageConfig loadedlocales $ns]
+	    dict set PackageConfig locales $ns $locale $loclist
 	    if {$locale in $loadedLocales} { return $locale }
 	    set loadLocales [ListComplement $loadedLocales $loclist]
 	    dict set PackageConfig loadedlocales $ns\
@@ -521,6 +590,7 @@ proc msgcat::mcpackagelocale {subcommand {locale ""}} {
 		    [dict get $PackageConfig loadedlocales $ns] $LoadedLocales]
 	    dict unset PackageConfig loadedlocales $ns
 	    dict unset PackageConfig loclist $ns
+	    dict unset PackageConfig locales $ns
 
 	    # unset keys not in global loaded locales
 	    if {[dict exists $Msgs $ns]} {
@@ -847,6 +917,47 @@ proc msgcat::Load {ns locales {callbackonly 0}} {
     return $x
 }
 
+# msgcat::Merge --
+#
+#	Merge message catalog dictionaries to one dictionary.
+#
+# Arguments:
+#	ns		Namespace (equal package) to load the message catalog.
+#	locales		List of locales to merge.
+#
+# Results:
+#	Returns the merged dictionary of message catalogs.
+proc msgcat::Merge {ns locales} {
+    variable Merged
+    if {![catch {
+    	set mrgcat [dict get $Merged $ns [set loc [lindex $locales 0]]]
+    }]} {
+    	return $mrgcat
+    }
+    variable Msgs
+    # Merge sequential locales (in reverse order, e. g. {} -> en -> en_en):
+    if {[llength $locales] > 1} {
+	set mrgcat [msgcat::Merge $ns [lrange $locales 1 end]]
+	catch {
+	    set mrgcat [dict merge $mrgcat [dict get $Msgs $ns $loc]]
+	}
+    } else {
+	if {[catch {
+	    set mrgcat [dict get $Msgs $ns $loc]
+	}]} {
+	    set mrgcat [dict create]
+	}
+    }
+    dict set Merged $ns $loc $mrgcat
+    # return smart reference (shared dict as object with exact one ref-counter)
+    return [dict smartref $mrgcat]
+}
+
+proc msgcat::ClearCaches {ns} {
+    variable Merged
+    dict unset Merged $ns
+}
+
 # msgcat::Invoke --
 #
 #	Invoke a set of registered callbacks.
@@ -919,6 +1030,7 @@ proc msgcat::Invoke {index arglist {ns ""} {resultname ""} {failerror 0}} {
 
 proc msgcat::mcset {locale src {dest ""}} {
     variable Msgs
+    variable Merged
     if {[llength [info level 0]] == 3} { ;# dest not specified
 	set dest $src
     }
@@ -928,6 +1040,7 @@ proc msgcat::mcset {locale src {dest ""}} {
     set locale [string tolower $locale]
 
     dict set Msgs $ns $locale $src $dest
+    dict unset Merged $ns
     return $dest
 }
 
@@ -967,6 +1080,7 @@ proc msgcat::mcflset {src {dest ""}} {
 
 proc msgcat::mcmset {locale pairs} {
     variable Msgs
+    variable Merged
 
     set length [llength $pairs]
     if {$length % 2} {
@@ -980,6 +1094,7 @@ proc msgcat::mcmset {locale pairs} {
     foreach {src dest} $pairs {
 	dict set Msgs $ns $locale $src $dest
     }
+    dict unset Merged $ns
 
     return [expr {$length / 2}]
 }
diff --git a/library/reg/pkgIndex.tcl b/library/reg/pkgIndex.tcl
index b1fe234..ab022ab 100755
--- a/library/reg/pkgIndex.tcl
+++ b/library/reg/pkgIndex.tcl
@@ -1,9 +1,19 @@
 if {([info commands ::tcl::pkgconfig] eq "")
-	|| ([info sharedlibextension] ne ".dll")} return
+  || ([info sharedlibextension] ne ".dll")} return
 if {[::tcl::pkgconfig get debug]} {
+  if {[info exists [file join $dir tclreg13g.dll]]} {
     package ifneeded registry 1.3.2 \
             [list load [file join $dir tclreg13g.dll] registry]
+  } else {
+    package ifneeded registry 1.3.2 \
+            [list load tclreg13g registry]
+  }
 } else {
+  if {[info exists [file join $dir tclreg13.dll]]} {
     package ifneeded registry 1.3.2 \
             [list load [file join $dir tclreg13.dll] registry]
+  } else {
+    package ifneeded registry 1.3.2 \
+            [list load tclreg13 registry]
+  }
 }
diff --git a/tests-perf/clock.perf.tcl b/tests-perf/clock.perf.tcl
new file mode 100644
index 0000000..238e536
--- /dev/null
+++ b/tests-perf/clock.perf.tcl
@@ -0,0 +1,411 @@
+#!/usr/bin/tclsh
+# ------------------------------------------------------------------------
+#
+# test-performance.tcl --
+# 
+#  This file provides common performance tests for comparison of tcl-speed
+#  degradation by switching between branches.
+#  (currently for clock ensemble only)
+#
+# ------------------------------------------------------------------------
+# 
+# Copyright (c) 2014 Serg G. Brester (aka sebres)
+# 
+# See the file "license.terms" for information on usage and redistribution
+# of this file.
+# 
+
+
+## set testing defaults:
+set ::env(TCL_TZ) :CET
+
+# warm-up interpeter compiler env, clock platform-related features,
+# calibrate timerate measurement functionality:
+puts -nonewline "Calibration ... "; flush stdout
+puts "done: [lrange \
+  [timerate -calibrate {}] \
+0 1]"
+
+## warm-up test-related features (load clock.tcl, system zones, locales, etc.):
+clock scan "" -gmt 1
+clock scan ""
+clock scan "" -timezone :CET
+clock scan "" -format "" -locale en
+clock scan "" -format "" -locale de
+
+## ------------------------------------------
+
+proc {**STOP**} {args} {
+  return -code error -level 4 "**STOP** in [info level [expr {[info level]-2}]] [join $args { }]" 
+}
+
+proc _test_get_commands {lst} {
+  regsub -all {(?:^|\n)[ \t]*(\#[^\n]*|\msetup\M[^\n]*|\mcleanup\M[^\n]*)(?=\n\s*(?:[\{\#]|setup|cleanup))} $lst "\n{\\1}"
+}
+
+proc _test_out_total {} {
+  upvar _ _
+
+  set tcnt [llength $_(itm)]
+  if {!$tcnt} {
+    puts ""
+    return
+  }
+
+  set mintm 0x7fffffff
+  set maxtm 0
+  set nett 0
+  set wtm 0
+  set wcnt 0
+  set i 0
+  foreach tm $_(itm) {
+    if {[llength $tm] > 6} {
+      set nett [expr {$nett + [lindex $tm 6]}]
+    }
+    set wtm [expr {$wtm + [lindex $tm 0]}]
+    set wcnt [expr {$wcnt + [lindex $tm 2]}]
+    set tm [lindex $tm 0]
+    if {$tm > $maxtm} {set maxtm $tm; set maxi $i}
+    if {$tm < $mintm} {set mintm $tm; set mini $i}
+    incr i
+  }
+
+  puts [string repeat ** 40]
+  set s [format "%d cases in %.2f sec." $tcnt [expr {$tcnt * $_(reptime) / 1000.0}]]
+  if {$nett > 0} {
+    append s [format " (%.2f nett-sec.)" [expr {$nett / 1000.0}]]
+  }
+  puts "Total $s:"
+  lset _(m) 0 [format %.6f $wtm]
+  lset _(m) 2 $wcnt
+  lset _(m) 4 [format %.3f [expr {$wcnt / (($nett ? $nett : ($tcnt * $_(reptime))) / 1000.0)}]]
+  if {[llength $_(m)] > 6} {
+    lset _(m) 6 [format %.3f $nett]
+  }
+  puts $_(m)
+  puts "Average:"
+  lset _(m) 0 [format %.6f [expr {[lindex $_(m) 0] / $tcnt}]]
+  lset _(m) 2 [expr {[lindex $_(m) 2] / $tcnt}]
+  if {[llength $_(m)] > 6} {
+    lset _(m) 6 [format %.3f [expr {[lindex $_(m) 6] / $tcnt}]]
+    lset _(m) 4 [format %.0f [expr {[lindex $_(m) 2] / [lindex $_(m) 6] * 1000}]]
+  }
+  puts $_(m)
+  puts "Min:"
+  puts [lindex $_(itm) $mini]
+  puts "Max:"
+  puts [lindex $_(itm) $maxi]
+  puts [string repeat ** 40]
+  puts ""
+}
+
+proc _test_run {reptime lst {outcmd {puts $_(r)}}} {
+  upvar _ _
+  array set _ [list itm {} reptime $reptime]
+
+  foreach _(c) [_test_get_commands $lst] {
+    puts "% [regsub -all {\n[ \t]*} $_(c) {; }]"
+    if {[regexp {^\s*\#} $_(c)]} continue
+    if {[regexp {^\s*(?:setup|cleanup)\s+} $_(c)]} {
+      puts [if 1 [lindex $_(c) 1]]
+      continue
+    }
+    set _(r) [if 1 $_(c)]
+    if {$outcmd ne {}} $outcmd
+    puts [set _(m) [timerate $_(c) $reptime]]
+    lappend _(itm) $_(m)
+    puts ""
+  }
+  _test_out_total
+}
+
+proc test-format {{reptime 1000}} {
+  _test_run $reptime {
+    # Format : short, week only (in gmt)
+    {clock format 1482525936 -format "%u" -gmt 1}
+    # Format : short, week only (system zone)
+    {clock format 1482525936 -format "%u"}
+    # Format : short, week only (CEST)
+    {clock format 1482525936 -format "%u" -timezone :CET}
+    # Format : date only (in gmt)
+    {clock format 1482525936 -format "%Y-%m-%d" -gmt 1}
+    # Format : date only (system zone)
+    {clock format 1482525936 -format "%Y-%m-%d"}
+    # Format : date only (CEST)
+    {clock format 1482525936 -format "%Y-%m-%d" -timezone :CET}
+    # Format : time only (in gmt)
+    {clock format 1482525936 -format "%H:%M" -gmt 1}
+    # Format : time only (system zone)
+    {clock format 1482525936 -format "%H:%M"}
+    # Format : time only (CEST)
+    {clock format 1482525936 -format "%H:%M" -timezone :CET}
+    # Format : time only (in gmt)
+    {clock format 1482525936 -format "%H:%M:%S" -gmt 1}
+    # Format : time only (system zone)
+    {clock format 1482525936 -format "%H:%M:%S"}
+    # Format : time only (CEST)
+    {clock format 1482525936 -format "%H:%M:%S" -timezone :CET}
+    # Format : default (in gmt)
+    {clock format 1482525936 -gmt 1 -locale en}
+    # Format : default (system zone)
+    {clock format 1482525936 -locale en}
+    # Format : default (CEST)
+    {clock format 1482525936 -timezone :CET -locale en}
+    # Format : ISO date-time (in gmt, numeric zone)
+    {clock format 1246379400 -format "%Y-%m-%dT%H:%M:%S %z" -gmt 1}
+    # Format : ISO date-time (system zone, CEST, numeric zone)
+    {clock format 1246379400 -format "%Y-%m-%dT%H:%M:%S %z"}
+    # Format : ISO date-time (CEST, numeric zone)
+    {clock format 1246379400 -format "%Y-%m-%dT%H:%M:%S %z" -timezone :CET}
+    # Format : ISO date-time (system zone, CEST)
+    {clock format 1246379400 -format "%Y-%m-%dT%H:%M:%S %Z"}
+    # Format : julian day with time (in gmt):
+    {clock format 1246379415 -format "%J %H:%M:%S" -gmt 1}
+    # Format : julian day with time (system zone):
+    {clock format 1246379415 -format "%J %H:%M:%S"}
+
+    # Format : locale date-time (en):
+    {clock format 1246379415 -format "%x %X" -locale en}
+    # Format : locale date-time (de):
+    {clock format 1246379415 -format "%x %X" -locale de}
+
+    # Format : locale lookup table month:
+    {clock format 1246379400 -format "%b" -locale en -gmt 1}
+    # Format : locale lookup 2 tables - month and day:
+    {clock format 1246379400 -format "%b %Od" -locale en -gmt 1}
+    # Format : locale lookup 3 tables - week, month and day:
+    {clock format 1246379400 -format "%a %b %Od" -locale en -gmt 1}
+    # Format : locale lookup 4 tables - week, month, day and year:
+    {clock format 1246379400 -format "%a %b %Od %Oy" -locale en -gmt 1}
+
+    # Format : dynamic clock value (without converter caches):
+    setup {set i 0}
+    {clock format [incr i] -format "%Y-%m-%dT%H:%M:%S" -locale en -timezone :CET}
+    cleanup {puts [clock format $i -format "%Y-%m-%dT%H:%M:%S" -locale en -timezone :CET]}
+    # Format : dynamic clock value (without any converter caches, zone range overflow):
+    setup {set i 0}
+    {clock format [incr i 86400] -format "%Y-%m-%dT%H:%M:%S" -locale en -timezone :CET}
+    cleanup {puts [clock format $i -format "%Y-%m-%dT%H:%M:%S" -locale en -timezone :CET]}
+
+    # Format : dynamic format (cacheable)
+    {clock format 1246379415 -format [string trim "%d.%m.%Y %H:%M:%S "] -gmt 1}
+
+    # Format : all (in gmt, locale en)
+    {clock format 1482525936 -format "%%a = %a | %%A = %A | %%b = %b | %%h = %h | %%B = %B | %%C = %C | %%d = %d | %%e = %e | %%g = %g | %%G = %G | %%H = %H | %%I = %I | %%j = %j | %%J = %J | %%k = %k | %%l = %l | %%m = %m | %%M = %M | %%N = %N | %%p = %p | %%P = %P | %%Q = %Q | %%s = %s | %%S = %S | %%t = %t | %%u = %u | %%U = %U | %%V = %V | %%w = %w | %%W = %W | %%y = %y | %%Y = %Y | %%z = %z | %%Z = %Z | %%n = %n | %%EE = %EE | %%EC = %EC | %%Ey = %Ey | %%n = %n | %%Od = %Od | %%Oe = %Oe | %%OH = %OH | %%Ok = %Ok | %%OI = %OI | %%Ol = %Ol | %%Om = %Om | %%OM = %OM | %%OS = %OS | %%Ou = %Ou | %%Ow = %Ow | %%Oy = %Oy" -gmt 1 -locale en}
+    # Format : all (in CET, locale de)
+    {clock format 1482525936 -format "%%a = %a | %%A = %A | %%b = %b | %%h = %h | %%B = %B | %%C = %C | %%d = %d | %%e = %e | %%g = %g | %%G = %G | %%H = %H | %%I = %I | %%j = %j | %%J = %J | %%k = %k | %%l = %l | %%m = %m | %%M = %M | %%N = %N | %%p = %p | %%P = %P | %%Q = %Q | %%s = %s | %%S = %S | %%t = %t | %%u = %u | %%U = %U | %%V = %V | %%w = %w | %%W = %W | %%y = %y | %%Y = %Y | %%z = %z | %%Z = %Z | %%n = %n | %%EE = %EE | %%EC = %EC | %%Ey = %Ey | %%n = %n | %%Od = %Od | %%Oe = %Oe | %%OH = %OH | %%Ok = %Ok | %%OI = %OI | %%Ol = %Ol | %%Om = %Om | %%OM = %OM | %%OS = %OS | %%Ou = %Ou | %%Ow = %Ow | %%Oy = %Oy" -timezone :CET -locale de}
+  }
+}
+
+proc test-scan {{reptime 1000}} {
+  _test_run $reptime {
+    # Scan : date (in gmt)
+    {clock scan "25.11.2015" -format "%d.%m.%Y" -base 0 -gmt 1}
+    # Scan : date (system time zone, with base)
+    {clock scan "25.11.2015" -format "%d.%m.%Y" -base 0}
+    # Scan : date (system time zone, without base)
+    {clock scan "25.11.2015" -format "%d.%m.%Y"}
+    # Scan : greedy match
+    {clock scan "111" -format "%d%m%y" -base 0 -gmt 1}
+    {clock scan "1111" -format "%d%m%y" -base 0 -gmt 1}
+    {clock scan "11111" -format "%d%m%y" -base 0 -gmt 1}
+    {clock scan "111111" -format "%d%m%y" -base 0 -gmt 1}
+    # Scan : greedy match (space separated)
+    {clock scan "1 1 1" -format "%d%m%y" -base 0 -gmt 1}
+    {clock scan "111 1" -format "%d%m%y" -base 0 -gmt 1}
+    {clock scan "1 111" -format "%d%m%y" -base 0 -gmt 1}
+    {clock scan "1 11 1" -format "%d%m%y" -base 0 -gmt 1}
+    {clock scan "1 11 11" -format "%d%m%y" -base 0 -gmt 1}
+    {clock scan "11 11 11" -format "%d%m%y" -base 0 -gmt 1}
+
+    # Scan : time (in gmt)
+    {clock scan "10:35:55" -format "%H:%M:%S" -base 1000000000 -gmt 1}
+    # Scan : time (system time zone, with base)
+    {clock scan "10:35:55" -format "%H:%M:%S" -base 1000000000}
+    # Scan : time (gmt, without base)
+    {clock scan "10:35:55" -format "%H:%M:%S" -gmt 1}
+    # Scan : time (system time zone, without base)
+    {clock scan "10:35:55" -format "%H:%M:%S"}
+
+    # Scan : date-time (in gmt)
+    {clock scan "25.11.2015 10:35:55" -format "%d.%m.%Y %H:%M:%S" -base 0 -gmt 1}
+    # Scan : date-time (system time zone with base)
+    {clock scan "25.11.2015 10:35:55" -format "%d.%m.%Y %H:%M:%S" -base 0}
+    # Scan : date-time (system time zone without base)
+    {clock scan "25.11.2015 10:35:55" -format "%d.%m.%Y %H:%M:%S"}
+
+    # Scan : julian day in gmt
+    {clock scan 2451545 -format %J -gmt 1}
+    # Scan : julian day in system TZ
+    {clock scan 2451545 -format %J}
+    # Scan : julian day in other TZ
+    {clock scan 2451545 -format %J -timezone +0200}
+    # Scan : julian day with time:
+    {clock scan "2451545 10:20:30" -format "%J %H:%M:%S"}
+    # Scan : julian day with time (greedy match):
+    {clock scan "2451545 102030" -format "%J%H%M%S"}
+
+    # Scan : century, lookup table month
+    {clock scan {1970 Jan 2} -format {%C%y %b %d} -locale en -gmt 1}
+    # Scan : century, lookup table month and day (both entries are first)
+    {clock scan {1970 Jan 01} -format {%C%y %b %Od} -locale en -gmt 1}
+    # Scan : century, lookup table month and day (list scan: entries with position 12 / 31)
+    {clock scan {2016 Dec 31} -format {%C%y %b %Od} -locale en -gmt 1}
+
+    # Scan : ISO date-time (CEST)
+    {clock scan "2009-06-30T18:30:00+02:00" -format "%Y-%m-%dT%H:%M:%S%z"}
+    {clock scan "2009-06-30T18:30:00 CEST" -format "%Y-%m-%dT%H:%M:%S %z"}
+    # Scan : ISO date-time (UTC)
+    {clock scan "2009-06-30T18:30:00Z" -format "%Y-%m-%dT%H:%M:%S%z"}
+    {clock scan "2009-06-30T18:30:00 UTC" -format "%Y-%m-%dT%H:%M:%S %z"}
+
+    # Scan : locale date-time (en):
+    {clock scan "06/30/2009 18:30:15" -format "%x %X" -gmt 1 -locale en}
+    # Scan : locale date-time (de):
+    {clock scan "30.06.2009 18:30:15" -format "%x %X" -gmt 1 -locale de}
+
+    # Scan : dynamic format (cacheable)
+    {clock scan "25.11.2015 10:35:55" -format [string trim "%d.%m.%Y %H:%M:%S "] -base 0 -gmt 1}
+
+    break
+    # # Scan : long format test (allock chain)
+    # {clock scan "25.11.2015" -format "%d.%m.%Y %d.%m.%Y %d.%m.%Y %d.%m.%Y %d.%m.%Y %d.%m.%Y %d.%m.%Y %d.%m.%Y" -base 0 -gmt 1}
+    # # Scan : dynamic, very long format test (create obj representation, allock chain, GC, etc):
+    # {clock scan "25.11.2015" -format [string repeat "[incr i] %d.%m.%Y %d.%m.%Y" 10] -base 0 -gmt 1}
+    # # Scan : again:
+    # {clock scan "25.11.2015" -format [string repeat "[incr i -1] %d.%m.%Y %d.%m.%Y" 10] -base 0 -gmt 1}
+  } {puts [clock format $_(r) -locale en]}
+}
+
+proc test-freescan {{reptime 1000}} {
+  _test_run $reptime {
+    # FreeScan : relative date
+    {clock scan "5 years 18 months 385 days" -base 0 -gmt 1}
+    # FreeScan : relative date with relative weekday
+    {clock scan "5 years 18 months 385 days Fri" -base 0 -gmt 1}
+    # FreeScan : relative date with ordinal month
+    {clock scan "5 years 18 months 385 days next 1 January" -base 0 -gmt 1}
+    # FreeScan : relative date with ordinal month and relative weekday
+    {clock scan "5 years 18 months 385 days next January Fri" -base 0 -gmt 1}
+    # FreeScan : ordinal month
+    {clock scan "next January" -base 0 -gmt 1}
+    # FreeScan : relative week
+    {clock scan "next Fri" -base 0 -gmt 1}
+    # FreeScan : relative weekday and week offset 
+    {clock scan "next January + 2 week" -base 0 -gmt 1}
+    # FreeScan : time only with base
+    {clock scan "19:18:30" -base 148863600 -gmt 1}
+    # FreeScan : time only without base, gmt
+    {clock scan "19:18:30" -gmt 1}
+    # FreeScan : time only without base, system
+    {clock scan "19:18:30"}
+    # FreeScan : date, system time zone
+    {clock scan "05/08/2016 20:18:30"}
+    # FreeScan : date, supplied time zone
+    {clock scan "05/08/2016 20:18:30" -timezone :CET}
+    # FreeScan : date, supplied gmt (equivalent -timezone :GMT)
+    {clock scan "05/08/2016 20:18:30" -gmt 1}
+    # FreeScan : date, supplied time zone gmt
+    {clock scan "05/08/2016 20:18:30" -timezone :GMT}
+    # FreeScan : time only, numeric zone in string, base time gmt (exchange zones between gmt / -0500)
+    {clock scan "20:18:30 -0500" -base 148863600 -gmt 1}
+    # FreeScan : time only, zone in string (exchange zones between system / gmt)
+    {clock scan "19:18:30 GMT" -base 148863600}
+    # FreeScan : fast switch of zones in cycle - GMT, MST, CET (system) and EST
+    {clock scan "19:18:30 MST" -base 148863600 -gmt 1
+     clock scan "19:18:30 EST" -base 148863600
+    }
+  } {puts [clock format $_(r) -locale en]}
+}
+
+proc test-add {{reptime 1000}} {
+  _test_run $reptime {
+    # Add : years
+    {clock add 1246379415 5 years -gmt 1}
+    # Add : months
+    {clock add 1246379415 18 months -gmt 1}
+    # Add : weeks
+    {clock add 1246379415 20 weeks -gmt 1}
+    # Add : days
+    {clock add 1246379415 385 days -gmt 1}
+    # Add : weekdays
+    {clock add 1246379415 3 weekdays -gmt 1}
+
+    # Add : hours
+    {clock add 1246379415 5 hours -gmt 1}
+    # Add : minutes
+    {clock add 1246379415 55 minutes -gmt 1}
+    # Add : seconds
+    {clock add 1246379415 100 seconds -gmt 1}
+
+    # Add : +/- in gmt
+    {clock add 1246379415 -5 years +21 months -20 weeks +386 days -19 hours +30 minutes -10 seconds -gmt 1}
+    # Add : +/- in system timezone
+    {clock add 1246379415 -5 years +21 months -20 weeks +386 days -19 hours +30 minutes -10 seconds -timezone :CET}
+
+    # Add : gmt
+    {clock add 1246379415 -5 years 18 months 366 days 5 hours 30 minutes 10 seconds -gmt 1}
+    # Add : system timezone
+    {clock add 1246379415 -5 years 18 months 366 days 5 hours 30 minutes 10 seconds -timezone :CET}
+
+    # Add : all in gmt
+    {clock add 1246379415 4 years 18 months 50 weeks 378 days 3 weekdays 5 hours 30 minutes 10 seconds -gmt 1}
+    # Add : all in system timezone
+    {clock add 1246379415 4 years 18 months 50 weeks 378 days 3 weekdays 5 hours 30 minutes 10 seconds -timezone :CET}
+
+  } {puts [clock format $_(r) -locale en]}
+}
+
+proc test-other {{reptime 1000}} {
+  _test_run $reptime {
+    # Bad zone
+    {catch {clock scan "1 day" -timezone BAD_ZONE -locale en}}
+
+    # Scan : julian day (overflow)
+    {catch {clock scan 5373485 -format %J}}
+
+    # Scan : test rotate of GC objects (format is dynamic, so tcl-obj removed with last reference)
+    {set i 0; time { clock scan "[incr i] - 25.11.2015" -format "$i - %d.%m.%Y" -base 0 -gmt 1 } 50}
+    # Scan : test reusability of GC objects (format is dynamic, so tcl-obj removed with last reference)
+    {set i 50; time { clock scan "[incr i -1] - 25.11.2015" -format "$i - %d.%m.%Y" -base 0 -gmt 1 } 50}
+  }
+}
+
+proc test-ensemble-perf {{reptime 1000}} {
+  _test_run $reptime {
+    # Clock clicks (ensemble)
+    {clock clicks}
+    # Clock clicks (direct)
+    {::tcl::clock::clicks}
+    # Clock seconds (ensemble)
+    {clock seconds}
+    # Clock seconds (direct)
+    {::tcl::clock::seconds}
+    # Clock microseconds (ensemble)
+    {clock microseconds}
+    # Clock microseconds (direct)
+    {::tcl::clock::microseconds}
+    # Clock scan (ensemble)
+    {clock scan ""}
+    # Clock scan (direct)
+    {::tcl::clock::scan ""}
+    # Clock format (ensemble)
+    {clock format 0 -f %s}
+    # Clock format (direct)
+    {::tcl::clock::format 0 -f %s}
+  }
+}
+
+proc test {{reptime 1000}} {
+  puts ""
+  test-ensemble-perf [expr {$reptime / 2}]; #fast enough
+  test-format $reptime
+  test-scan $reptime
+  test-freescan $reptime
+  test-add $reptime
+  test-other $reptime
+
+  puts \n**OK**
+}
+
+test 500; # ms
diff --git a/tests/clock.test b/tests/clock.test
index 4e44348..5f9a3ec 100644
--- a/tests/clock.test
+++ b/tests/clock.test
@@ -7,6 +7,7 @@
 # generates output for errors.  No output means no errors were found.
 #
 # Copyright (c) 2004 by Kevin B. Kenny.  All rights reserved.
+# Copyright (c) 2015 by Sergey G. Brester aka sebres.
 #
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
@@ -34,10 +35,13 @@ testConstraint y2038 \
 
 # TEST PLAN
 
+# clock-0:
+#	several base test-cases
+#
 # clock-1:
-#	[clock format] - tests of bad and empty arguments 
+#	[clock format] - tests of bad and empty arguments
 #
-# clock-2 
+# clock-2
 #	formatting of year, month and day of month
 #
 # clock-3
@@ -195,7 +199,7 @@ namespace eval ::tcl::clock {
 	    l li lii liii liv lv lvi lvii lviii lix
 	    lx lxi lxii lxiii lxiv lxv lxvi lxvii lxviii lxix
 	    lxx lxxi lxxii lxxiii lxxiv lxxv lxxvi lxxvii lxxviii lxxix
-	    lxxx lxxxi lxxxii lxxxiii lxxxiv lxxxv lxxxvi lxxxvii lxxxviii 
+	    lxxx lxxxi lxxxii lxxxiii lxxxiv lxxxv lxxxvi lxxxvii lxxxviii
 	    lxxxix
 	    xc xci xcii xciii xciv xcv xcvi xcvii xcviii xcix
 	    c
@@ -250,11 +254,33 @@ proc ::testClock::registry { cmd path key } {
     return [dict get $reg $path $key]
 }
 
+# Base test cases:
+
+test clock-0.1 "initial: auto-loading of ensemble and stubs on demand" {
+    set i [interp create]; # because clock can be used somewhere, test it in new interp:
+
+    set ret [$i eval {
+
+	lappend ret ens:[namespace ensemble exists ::clock]
+	clock seconds; # init ensemble (but not yet stubs, loading of clock.tcl retarded)
+	lappend ret ens:[namespace ensemble exists ::clock]
+	lappend ret stubs:[expr {[namespace which -command ::tcl::clock::GetSystemTimeZone] ne ""}]
+	clock format -now; # clock.tcl stubs expected
+	lappend ret stubs:[expr {[namespace which -command ::tcl::clock::GetSystemTimeZone] ne ""}]
+    }]
+    interp delete $i
+    set ret
+} {ens:0 ens:1 stubs:0 stubs:1}
+
 # Test some of the basics of [clock format]
 
 test clock-1.0 "clock format - wrong # args" {
     list [catch {clock format} msg] $msg $::errorCode
-} {1 {wrong # args: should be "clock format clockval ?-format string? ?-gmt boolean? ?-locale LOCALE? ?-timezone ZONE?"} {CLOCK wrongNumArgs}}
+} {1 {wrong # args: should be "clock format clockval|-now ?-format string? ?-gmt boolean? ?-locale LOCALE? ?-timezone ZONE?"} {CLOCK wrongNumArgs}}
+
+test clock-1.0.1 "clock format - wrong # args (compiled ensemble with invalid syntax)" {
+    list [catch {clock format 0 -too-few-options-4-test} msg] $msg $::errorCode
+} {1 {wrong # args: should be "clock format clockval|-now ?-format string? ?-gmt boolean? ?-locale LOCALE? ?-timezone ZONE?"} {CLOCK wrongNumArgs}}
 
 test clock-1.1 "clock format - bad time" {
     list [catch {clock format foo} msg] $msg
@@ -270,10 +296,11 @@ test clock-1.3 "clock format - empty val" {
 
 test clock-1.4 "clock format - bad flag" {*}{
     -body {
-    list [catch {clock format 0 -oops badflag} msg] $msg $::errorCode
-    } 
+    # range error message for possible extensions:
+    list [catch {clock format 0 -oops badflag} msg] [string range $msg 0 60] $::errorCode
+    }
     -match glob
-    -result {1 {bad option "-oops": must be -format, -gmt, -locale, or -timezone} {CLOCK badOption -oops}}
+    -result {1 {bad option "-oops": must be -format, -gmt, -locale, -timezone} {CLOCK badOption -oops}}
 }
 
 test clock-1.5 "clock format - bad timezone" {
@@ -288,6 +315,16 @@ test clock-1.7 "clock format - option abbreviations" {
     clock format 0 -g true -f "%Y-%m-%d"
 } 1970-01-01
 
+test clock-1.8 "clock format -now" {
+    # give one second more for test (if on boundary of the current second):
+    set n [clock format [clock seconds] -g 1 -f "%s"]
+    expr {[clock format -now -g 1 -f "%s"] in [list $n [incr n]]}
+} 1
+
+test clock-1.9 "clock arguments: option doubly present" {
+    list [catch {clock format 0 -gmt 1 -gmt 0} result] $result
+} {1 {bad option "-gmt": doubly present}}
+
 # BEGIN testcases2
 
 # Test formatting of Gregorian year, month, day, all formats
@@ -18553,17 +18590,177 @@ test clock-6.8 {input of seconds} {
 } 9223372036854775807
 
 test clock-6.9 {input of seconds - overflow} {
-    list [catch {clock scan -9223372036854775809 -format %s -gmt true} result] $result
-} {1 {integer value too large to represent}}
+    list [catch {clock scan -9223372036854775809 -format %s -gmt true} result] $result $::errorCode
+} {1 {requested date too large to represent} {CLOCK dateTooLarge}}
 
 test clock-6.10 {input of seconds - overflow} {
-    list [catch {clock scan 9223372036854775808 -format %s -gmt true} result] $result
-} {1 {integer value too large to represent}}
+    list [catch {clock scan 9223372036854775808 -format %s -gmt true} result] $result $::errorCode
+} {1 {requested date too large to represent} {CLOCK dateTooLarge}}
 
 test clock-6.11 {input of seconds - two values} {
     clock scan {1 2} -format {%s %s} -gmt true
 } 2
 
+test clock-6.12 {input of unambiguous short locale token (%b)} {
+    list [clock scan "12 Ja 2001" -format "%d %b %Y" -locale en_US_roman -gmt 1] \
+	 [clock scan "12 Au 2001" -format "%d %b %Y" -locale en_US_roman -gmt 1]
+} {979257600 997574400}
+test clock-6.13 {input of lowercase locale token (%b)} {
+    list [clock scan "12 ja 2001" -format "%d %b %Y" -locale en_US_roman -gmt 1] \
+	 [clock scan "12 au 2001" -format "%d %b %Y" -locale en_US_roman -gmt 1]
+} {979257600 997574400}
+test clock-6.14 {input of uppercase locale token (%b)} {
+    list [clock scan "12 JA 2001" -format "%d %b %Y" -locale en_US_roman -gmt 1] \
+	 [clock scan "12 AU 2001" -format "%d %b %Y" -locale en_US_roman -gmt 1]
+} {979257600 997574400}
+test clock-6.15 {input of ambiguous short locale token (%b)} {
+    list [catch {
+	clock scan "12 J 2001" -format "%d %b %Y" -locale en_US_roman -gmt 1
+    } result] $result $errorCode
+} {1 {input string does not match supplied format} {CLOCK badInputString}}
+test clock-6.16 {input of ambiguous short locale token (%b)} {
+    list [catch {
+	clock scan "12 Ju 2001" -format "%d %b %Y" -locale en_US_roman -gmt 1
+    } result] $result $errorCode
+} {1 {input string does not match supplied format} {CLOCK badInputString}}
+
+test clock-6.17 {spaces are always optional in non-strict mode (default)} {
+    list [clock scan "2009-06-30T18:30:00+02:00" -format "%Y-%m-%dT%H:%M:%S%z" -gmt 1] \
+	 [clock scan "2009-06-30T18:30:00  +02:00" -format "%Y-%m-%dT%H:%M:%S%z" -gmt 1] \
+	 [clock scan "2009-06-30T18:30:00Z" -format "%Y-%m-%dT%H:%M:%S%z" -timezone CET] \
+	 [clock scan "2009-06-30T18:30:00  Z" -format "%Y-%m-%dT%H:%M:%S%z" -timezone CET]
+} {1246379400 1246379400 1246386600 1246386600}
+
+test clock-6.18 {zone token (%z) is optional} {
+    list [clock scan "2009-06-30T18:30:00 -01:00" -format "%Y-%m-%dT%H:%M:%S%z" -gmt 1] \
+         [clock scan "2009-06-30T18:30:00" -format "%Y-%m-%dT%H:%M:%S%z" -gmt 1] \
+	 [clock scan "  2009-06-30T18:30:00  " -format "%Y-%m-%dT%H:%M:%S%z" -gmt 1] \
+} {1246390200 1246386600 1246386600}
+
+test clock-6.19 {no token parsing} {
+    list [catch { clock scan "%E%O%" -format "%E%O%" }] \
+         [catch { clock scan "...%..." -format "...%%..." }]
+} {0 0}
+
+test clock-6.20 {special char tokens %n, %t} {
+    clock scan "30\t06\t2009\n18\t30" -format "%d%t%m%t%Y%n%H%t%M" -gmt 1
+} 1246386600
+
+# Hi, Jeff!
+proc _testStarDates {s {days {366*2}} {step {86400}}} {
+    set step [expr {int($step * 86400)}]
+    # reconvert - arrange in order of stardate:
+    set s [set i [clock scan [clock format $s -f "%Q" -g 1] -g 1]]
+    # test:
+    set wrong {}
+    while {$i < $s + $days*86400} {
+	set d [clock format $i -f "%Q" -g 1]
+	if {![regexp {^Stardate \d+\.\d$} $d]} {
+	    lappend wrong "wrong: $d -- ($i) -- [clock format $i -g 1]"
+	}
+	if {[catch {
+	    set i2 [clock scan $d -f "%Q" -g 1]
+	} msg]} {
+	    lappend wrong "$d -- ($i) -- [clock format $i -g 1]: $msg"
+	}
+	if {$i != $i2} {
+	    lappend wrong "$d -- ($i != $i2) -- [clock format $i -g 1]"
+	}
+	incr i $step
+    }
+    join $wrong \n
+}
+test clock-6.21.0 {Stardate 0 day} {
+    list [set d [clock format -757382400 -format "%Q" -gmt 1]] \
+         [clock scan $d -format "%Q" -gmt 1]
+} [list "Stardate 00000.0" -757382400]
+test clock-6.21.0.1 {Stardate 0.1 - 1.9 (test negative clock value -> positive Stardate)} {
+    _testStarDates -757382400 2 0.1
+} {}
+test clock-6.21.0.2 {Stardate 10000.1 - 10002.9 (test negative clock value -> positive Stardate)} {
+    _testStarDates [clock scan "Stardate 10000.1" -f %Q -g 1] 3 0.1
+} {}
+test clock-6.21.0.2 {Stardate 80000.1 - 80002.9 (test positive clock value)} {
+    _testStarDates [clock scan "Stardate 80001.1" -f %Q -g 1] 3 0.1
+} {}
+test clock-6.21.1 {Stardate} {
+    list [set d [clock format 1482857280 -format "%Q" -gmt 1]] \
+         [clock scan $d -format "%Q" -gmt 1]
+} [list "Stardate 70986.7" 1482857280]
+test clock-6.21.2 {Stardate next time} {
+    list [set d [clock format 1482865920 -format "%Q" -gmt 1]] \
+         [clock scan $d -format "%Q" -gmt 1]
+} [list "Stardate 70986.8" 1482865920]
+test clock-6.21.3 {Stardate correct scan over year (leap year, begin, middle and end of the year)} {
+    _testStarDates [clock scan "01.01.2016" -f "%d.%m.%Y" -g 1] [expr {366*2}] 1
+} {}
+rename _testStarDates {}
+
+test clock-6.22.1 {Greedy match} {
+    clock format [clock scan "111" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Mon Jan 01 00:00:00 GMT 2001}
+test clock-6.22.2 {Greedy match} {
+    clock format [clock scan "1111" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Thu Jan 11 00:00:00 GMT 2001}
+test clock-6.22.3 {Greedy match} {
+    clock format [clock scan "11111" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Sun Nov 11 00:00:00 GMT 2001}
+test clock-6.22.4 {Greedy match} {
+    clock format [clock scan "111111" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Fri Nov 11 00:00:00 GMT 2011}
+test clock-6.22.5 {Greedy match} {
+    clock format [clock scan "1 1 1" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Mon Jan 01 00:00:00 GMT 2001}
+test clock-6.22.6 {Greedy match} {
+    clock format [clock scan "111 1" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Thu Jan 11 00:00:00 GMT 2001}
+test clock-6.22.7 {Greedy match} {
+    clock format [clock scan "1 111" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Thu Nov 01 00:00:00 GMT 2001}
+test clock-6.22.8 {Greedy match} {
+    clock format [clock scan "1 11 1" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Thu Nov 01 00:00:00 GMT 2001}
+test clock-6.22.9 {Greedy match} {
+    clock format [clock scan "1 11 11" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Tue Nov 01 00:00:00 GMT 2011}
+test clock-6.22.10 {Greedy match} {
+    clock format [clock scan "11 11 11" -format "%d%m%y" -gmt 1] -locale en -gmt 1
+} {Fri Nov 11 00:00:00 GMT 2011}
+test clock-6.22.11 {Greedy match} {
+    clock format [clock scan "1111 120" -format "%y%m%d %H%M%S" -gmt 1] -locale en -gmt 1
+} {Sat Jan 01 01:02:00 GMT 2011}
+test clock-6.22.12 {Greedy match} {
+    clock format [clock scan "11 1 120" -format "%y%m%d %H%M%S" -gmt 1] -locale en -gmt 1
+} {Mon Jan 01 01:02:00 GMT 2001}
+test clock-6.22.13 {Greedy match} {
+    clock format [clock scan "1 11 120" -format "%y%m%d %H%M%S" -gmt 1] -locale en -gmt 1
+} {Mon Jan 01 01:02:00 GMT 2001}
+test clock-6.22.14 {Greedy match} {
+    clock format [clock scan "111120" -format "%y%m%d%H%M%S" -gmt 1] -locale en -gmt 1
+} {Mon Jan 01 01:02:00 GMT 2001}
+test clock-6.22.15 {Greedy match} {
+    clock format [clock scan "1111120" -format "%y%m%d%H%M%S" -gmt 1] -locale en -gmt 1
+} {Sat Jan 01 01:02:00 GMT 2011}
+test clock-6.22.16 {Greedy match} {
+    clock format [clock scan "11121120" -format "%y%m%d%H%M%S" -gmt 1] -locale en -gmt 1
+} {Thu Dec 01 01:02:00 GMT 2011}
+test clock-6.22.17 {Greedy match} {
+    clock format [clock scan "111213120" -format "%y%m%d%H%M%S" -gmt 1] -locale en -gmt 1
+} {Tue Dec 13 01:02:00 GMT 2011}
+test clock-6.22.17 {Greedy match (space wins as date-time separator)} {
+    clock format [clock scan "1112 13120" -format "%y%m%d %H%M%S" -gmt 1] -locale en -gmt 1
+} {Sun Jan 02 13:12:00 GMT 2011}
+test clock-6.22.18 {Greedy match (second space wins as date-time separator)} {
+    clock format [clock scan "1112 13 120" -format "%y%m%d %H%M%S" -gmt 1] -locale en -gmt 1
+} {Tue Dec 13 01:02:00 GMT 2011}
+test clock-6.22.19 {Greedy match (space wins as date-time separator)} {
+    clock format [clock scan "111 213120" -format "%y%m%d %H%M%S" -gmt 1] -locale en -gmt 1
+} {Mon Jan 01 21:31:20 GMT 2001}
+test clock-6.22.20 {Greedy match (second space wins as date-time separator)} {
+    clock format [clock scan "111 2 13120" -format "%y%m%d %H%M%S" -gmt 1] -locale en -gmt 1
+} {Sun Jan 02 13:12:00 GMT 2011}
+
+
 test clock-7.1 {Julian Day} {
     clock scan 0 -format %J -gmt true
 } -210866803200
@@ -21070,78 +21267,78 @@ test clock-10.10 {julian day takes precedence over ccyyddd} {
 
 # BEGIN testcases11
 
-# Test precedence among yyyymmdd and yyyyddd
+# Test precedence yyyymmdd over yyyyddd
 
-test clock-11.1 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.1 {precedence of ccyymmdd over ccyyddd} {
     clock scan 19700101002 -format %Y%m%d%j -gmt 1
-} 86400
-test clock-11.2 {precedence of ccyyddd and ccyymmdd} {
+} 0
+test clock-11.2 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01197001002 -format %m%Y%d%j -gmt 1
-} 86400
-test clock-11.3 {precedence of ccyyddd and ccyymmdd} {
+} 0
+test clock-11.3 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01197001002 -format %d%Y%m%j -gmt 1
-} 86400
-test clock-11.4 {precedence of ccyyddd and ccyymmdd} {
+} 0
+test clock-11.4 {precedence of ccyymmdd over ccyyddd} {
     clock scan 00219700101 -format %j%Y%m%d -gmt 1
 } 0
-test clock-11.5 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.5 {precedence of ccyymmdd over ccyyddd} {
     clock scan 19700100201 -format %Y%m%j%d -gmt 1
 } 0
-test clock-11.6 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.6 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01197000201 -format %m%Y%j%d -gmt 1
 } 0
-test clock-11.7 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.7 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01197000201 -format %d%Y%j%m -gmt 1
 } 0
-test clock-11.8 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.8 {precedence of ccyymmdd over ccyyddd} {
     clock scan 00219700101 -format %j%Y%d%m -gmt 1
 } 0
-test clock-11.9 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.9 {precedence of ccyymmdd over ccyyddd} {
     clock scan 19700101002 -format %Y%d%m%j -gmt 1
-} 86400
-test clock-11.10 {precedence of ccyyddd and ccyymmdd} {
+} 0
+test clock-11.10 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01011970002 -format %m%d%Y%j -gmt 1
-} 86400
-test clock-11.11 {precedence of ccyyddd and ccyymmdd} {
+} 0
+test clock-11.11 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01011970002 -format %d%m%Y%j -gmt 1
-} 86400
-test clock-11.12 {precedence of ccyyddd and ccyymmdd} {
+} 0
+test clock-11.12 {precedence of ccyymmdd over ccyyddd} {
     clock scan 00201197001 -format %j%m%Y%d -gmt 1
 } 0
-test clock-11.13 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.13 {precedence of ccyymmdd over ccyyddd} {
     clock scan 19700100201 -format %Y%d%j%m -gmt 1
 } 0
-test clock-11.14 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.14 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01010021970 -format %m%d%j%Y -gmt 1
-} 86400
-test clock-11.15 {precedence of ccyyddd and ccyymmdd} {
+} 0
+test clock-11.15 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01010021970 -format %d%m%j%Y -gmt 1
-} 86400
-test clock-11.16 {precedence of ccyyddd and ccyymmdd} {
+} 0
+test clock-11.16 {precedence of ccyymmdd over ccyyddd} {
     clock scan 00201011970 -format %j%m%d%Y -gmt 1
 } 0
-test clock-11.17 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.17 {precedence of ccyymmdd over ccyyddd} {
     clock scan 19700020101 -format %Y%j%m%d -gmt 1
 } 0
-test clock-11.18 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.18 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01002197001 -format %m%j%Y%d -gmt 1
 } 0
-test clock-11.19 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.19 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01002197001 -format %d%j%Y%m -gmt 1
 } 0
-test clock-11.20 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.20 {precedence of ccyymmdd over ccyyddd} {
     clock scan 00201197001 -format %j%d%Y%m -gmt 1
 } 0
-test clock-11.21 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.21 {precedence of ccyymmdd over ccyyddd} {
     clock scan 19700020101 -format %Y%j%d%m -gmt 1
 } 0
-test clock-11.22 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.22 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01002011970 -format %m%j%d%Y -gmt 1
 } 0
-test clock-11.23 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.23 {precedence of ccyymmdd over ccyyddd} {
     clock scan 01002011970 -format %d%j%m%Y -gmt 1
 } 0
-test clock-11.24 {precedence of ccyyddd and ccyymmdd} {
+test clock-11.24 {precedence of ccyymmdd over ccyyddd} {
     clock scan 00201011970 -format %j%d%m%Y -gmt 1
 } 0
 # END testcases11
@@ -34992,6 +35189,10 @@ test clock-29.1800 {time parsing} {
 } 86399
 # END testcases29
 
+
+# BEGIN testcases30
+
+# Test [clock add]
 test clock-30.1 {clock add years} {
     set t [clock scan 2000-01-01 -format %Y-%m-%d -timezone :UTC]
     set f [clock add $t 1 year -timezone :UTC]
@@ -35218,10 +35419,61 @@ test clock-30.25 {clock add seconds at DST conversion} {
     set x1 [clock format $f1 -format {%Y-%m-%d %H:%M:%S %z} \
 		-timezone EST05:00EDT04:00,M4.1.0/02:00,M10.5.0/02:00]
 } {2004-10-31 01:00:00 -0500}
+test clock-30.26 {clock add weekdays} {
+    set t [clock scan {2013-11-20}] ;# Wednesday
+    set f1 [clock add $t 3 weekdays]
+    set x1 [clock format $f1 -format {%Y-%m-%d}]
+} {2013-11-25}
+test clock-30.27 {clock add weekdays starting on Saturday} {
+    set t [clock scan {2013-11-23}] ;# Saturday
+    set f1 [clock add $t 1 weekday]
+    set x1 [clock format $f1 -format {%Y-%m-%d}]
+} {2013-11-25}
+test clock-30.28 {clock add weekdays starting on Sunday} {
+    set t [clock scan {2013-11-24}] ;# Sunday
+    set f1 [clock add $t 1 weekday]
+    set x1 [clock format $f1 -format {%Y-%m-%d}]
+} {2013-11-25}
+test clock-30.29 {clock add 0 weekdays starting on a weekend} {
+    set t [clock scan {2016-02-27}] ;# Saturday
+    set f1 [clock add $t 0 weekdays]
+    set x1 [clock format $f1 -format {%Y-%m-%d}]
+} {2016-02-27}
+test clock-30.30 {clock add weekdays and back} -body {
+    set n [clock seconds]
+    # we start on each day of the week
+    for {set i 0} {$i < 7} {incr i} {
+        set start  [clock add $n $i days]
+        set startu [clock format $start -format %u]
+        # add 0 - 100 weekdays
+        for {set j 0} {$j < 100} {incr j} {
+            set forth [clock add $start $j weekdays]
+            set back  [clock add $forth -$j weekdays]
+            # If $s was a weekday or $j was 0, $b must be the same day.
+            # Otherwise, $b must be the immediately preceeding Friday
+            set fail 0
+            if {$j == 0 || $startu < 6} {
+                if {$start != $back} { set fail 1}
+            } else {
+                set friday [clock add $start -[expr {$startu % 5}] days]
+                if {$friday != $back} { set fail 1 }
+            }
+            if {$fail} {
+                set sdate [clock format $start -format {%Y-%m-%d}]
+                set bdate [clock format $back  -format {%Y-%m-%d}]
+                return "$sdate + $j - $j := $bdate"
+            }
+        }
+    }
+    return "OK"
+} -result {OK}
+
+# END testcases30
+
 
 test clock-31.1 {system locale} \
     -constraints win \
-    -setup { 
+    -setup {
 	namespace eval ::tcl::clock {
 	    namespace import -force ::testClock::registry
 	}
@@ -35244,7 +35496,7 @@ test clock-31.1 {system locale} \
 
 test clock-31.2 {system locale} \
     -constraints win \
-    -setup { 
+    -setup {
 	namespace eval ::tcl::clock {
 	    namespace import -force ::testClock::registry
 	}
@@ -35267,7 +35519,7 @@ test clock-31.2 {system locale} \
 
 test clock-31.3 {system locale} \
     -constraints win \
-    -setup { 
+    -setup {
 	namespace eval ::tcl::clock {
 	    namespace import -force ::testClock::registry
 	}
@@ -35290,7 +35542,7 @@ test clock-31.3 {system locale} \
 
 test clock-31.4 {system locale} \
     -constraints win \
-    -setup { 
+    -setup {
 	namespace eval ::tcl::clock {
 	    namespace import -force ::testClock::registry
 	}
@@ -35327,7 +35579,7 @@ test clock-31.4 {system locale} \
 
 test clock-31.5 {system locale} \
     -constraints win \
-    -setup { 
+    -setup {
 	namespace eval ::tcl::clock {
 	    namespace import -force ::testClock::registry
 	}
@@ -35364,7 +35616,7 @@ test clock-31.5 {system locale} \
 
 test clock-31.6 {system locale} \
     -constraints win \
-    -setup { 
+    -setup {
 	namespace eval ::tcl::clock {
 	    namespace import -force ::testClock::registry
 	}
@@ -35434,7 +35686,7 @@ test clock-32.1 {scan/format across the Gregorian change} {
     }
     set problems
 } {}
-			 
+
 # Legacy tests
 
 # clock clicks
@@ -35468,7 +35720,7 @@ test clock-33.5 {clock clicks tests, millisecond timing test} {
     # 60 msecs seems to be the max time slice under Windows 95/98
     expr {
 	  ($end > $start) && (($end - $start) <= 60) ?
-	  "ok" : 
+	  "ok" :
 	  "test should have taken 0-60 ms, actually took [expr $end - $start]"}
 } {ok}
 test clock-33.5a {clock tests, millisecond timing test} {
@@ -35480,7 +35732,7 @@ test clock-33.5a {clock tests, millisecond timing test} {
     # 60 msecs seems to be the max time slice under Windows 95/98
     expr {
 	  ($end > $start) && (($end - $start) <= 60) ?
-	  "ok" : 
+	  "ok" :
 	  "test should have taken 0-60 ms, actually took [expr $end - $start]"}
 } {ok}
 test clock-33.6 {clock clicks, milli with too much abbreviation} {
@@ -35607,7 +35859,7 @@ test clock-34.8 {clock scan tests} {
 } {Oct 23,1992 15:00 GMT}
 test clock-34.9 {clock scan tests} {
     list [catch {clock scan "Jan 12" -bad arg} msg] $msg
-} {1 {bad option "-bad", must be -base, -format, -gmt, -locale or -timezone}}
+} {1 {bad option "-bad": must be -format, -gmt, -locale, -timezone, or -base}}
 # The following two two tests test the two year date policy
 test clock-34.10 {clock scan tests} {
     set time [clock scan "1/1/71" -gmt true]
@@ -35617,7 +35869,15 @@ test clock-34.11 {clock scan tests} {
     set time [clock scan "1/1/37" -gmt true]
     clock format $time -format {%b %d,%Y %H:%M GMT} -gmt true
 } {Jan 01,2037 00:00 GMT}
-
+test clock-34.11.1 {clock scan tests: same century switch} {
+    set times [clock scan "1/1/37" -gmt true]
+} [clock scan "1/1/37" -format "%m/%d/%y" -gmt true]
+test clock-34.11.2 {clock scan tests: same century switch} {
+    set times [clock scan "1/1/38" -gmt true]
+} [clock scan "1/1/38" -format "%m/%d/%y" -gmt true]
+test clock-34.11.3 {clock scan tests: same century switch} {
+    set times [clock scan "1/1/39" -gmt true]
+} [clock scan "1/1/39" -format "%m/%d/%y" -gmt true]
 test clock-34.12 {clock scan, relative times} {
     set time [clock scan "Oct 23, 1992 -1 day"]
     clock format $time -format {%b %d, %Y}
@@ -35740,6 +36000,27 @@ test clock-34.40 {clock scan, next day of week} {
     clock format [clock scan "next thursday" -base [clock scan 20000112]] \
 	    -format {%b %d, %Y}
 } "Jan 20, 2000"
+test clock-34.40.1 {clock scan, ordinal month after relative date} {
+    # This will fail without the bug fix (clock.tcl), as still missing
+    # month/julian day conversion before ordinal month increment
+    clock format [ \
+        clock scan "5 years 18 months 387 days" -base 0 -gmt 1
+    ] -format {%a, %b %d, %Y} -gmt 1 -locale en_US_roman
+} "Sat, Jul 23, 1977"
+test clock-34.40.2 {clock scan, ordinal month after relative date} {
+    # This will fail without the bug fix (clock.tcl), as still missing
+    # month/julian day conversion before ordinal month increment
+    clock format [ \
+        clock scan "5 years 18 months 387 days next Jan" -base 0 -gmt 1
+    ] -format {%a, %b %d, %Y} -gmt 1 -locale en_US_roman
+} "Mon, Jan 23, 1978"
+test clock-34.40.3 {clock scan, day of week after ordinal date} {
+    # This will fail without the bug fix (clock.tcl), because the relative
+    # week day should be applied after whole date conversion
+    clock format [ \
+        clock scan "5 years 18 months 387 days next January Fri" -base 0 -gmt 1
+    ] -format {%a, %b %d, %Y} -gmt 1 -locale en_US_roman
+} "Fri, Jan 27, 1978"
 
 # weekday specification and base.
 test clock-34.41 {2nd monday in november} {
@@ -35804,36 +36085,123 @@ test clock-34.47 {ago with multiple relative units} {
 } 180000
 
 test clock-34.48 {more than one ToD} {*}{
-    -body {clock scan {10:00 11:00}} 
+    -body {clock scan {10:00 11:00}}
     -returnCodes error
     -result {unable to convert date-time string "10:00 11:00": more than one time of day in string}
 }
 
 test clock-34.49 {more than one date} {*}{
-    -body {clock scan {1/1/2001 2/2/2002}} 
+    -body {clock scan {1/1/2001 2/2/2002}}
     -returnCodes error
     -result {unable to convert date-time string "1/1/2001 2/2/2002": more than one date in string}
 }
 
 test clock-34.50 {more than one time zone} {*}{
-    -body {clock scan {10:00 EST CST}} 
+    -body {clock scan {10:00 EST CST}}
     -returnCodes error
     -result {unable to convert date-time string "10:00 EST CST": more than one time zone in string}
 }
 
 test clock-34.51 {more than one weekday} {*}{
-    -body {clock scan {Monday Tuesday}} 
+    -body {clock scan {Monday Tuesday}}
     -returnCodes error
     -result {unable to convert date-time string "Monday Tuesday": more than one weekday in string}
 }
 
 test clock-34.52 {more than one ordinal month} {*}{
-    -body {clock scan {next January next March}} 
+    -body {clock scan {next January next March}}
     -returnCodes error
     -result {unable to convert date-time string "next January next March": more than one ordinal month in string}
 }
 
+test clock-34.53.1 {relative from base, date switch} {
+    set base [clock scan "12/31/2016 23:59:59" -gmt 1]
+    clock format [clock scan "+1 second" \
+       -base $base -gmt 1] -gmt 1 -format {%Y-%m-%d %H:%M:%S}
+} {2017-01-01 00:00:00}
 
+test clock-34.53.2 {relative time, daylight switch} {
+    set base [clock scan "03/27/2016" -timezone CET]
+    set res {}
+    lappend res [clock format [clock scan "+1 hour" \
+       -base $base -timezone CET] -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]
+    lappend res [clock format [clock scan "+2 hour" \
+       -base $base -timezone CET] -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]
+} {{2016-03-27 01:00:00 CET} {2016-03-27 03:00:00 CEST}}
+
+test clock-34.53.3 {relative time with day increment / daylight switch} {
+    set base [clock scan "03/27/2016" -timezone CET]
+    set res {}
+    lappend res [clock format [clock scan "+5 day +25 hour" \
+       -base [expr {$base - 6*24*60*60}] -timezone CET] -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]
+    lappend res [clock format [clock scan "+5 day +26 hour" \
+       -base [expr {$base - 6*24*60*60}] -timezone CET] -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]
+} {{2016-03-27 01:00:00 CET} {2016-03-27 03:00:00 CEST}}
+
+test clock-34.53.4 {relative time with month & day increment / daylight switch} {
+    set base [clock scan "03/27/2016" -timezone CET]
+    set res {}
+    lappend res [clock format [clock scan "next Mar +5 day +25 hour" \
+       -base [expr {$base - 35*24*60*60}] -timezone CET] -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]
+    lappend res [clock format [clock scan "next Mar +5 day +26 hour" \
+       -base [expr {$base - 35*24*60*60}] -timezone CET] -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]
+} {{2016-03-27 01:00:00 CET} {2016-03-27 03:00:00 CEST}}
+
+test clock-34.54.1 {check date in DST-hole: daylight switch CET -> CEST} {
+    set res {}
+    # forwards
+    set base 1459033200
+    for {set i 0} {$i <= 3} {incr i} {
+    	set d [clock scan "+$i hour" -base $base -timezone CET]
+    	lappend res "$d = [clock format $d -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]"
+    }
+    lappend res "#--"
+    # backwards
+    set base 1459044000
+    for {set i 0} {$i <= 3} {incr i} {
+    	set d [clock scan "-$i hour" -base $base -timezone CET]
+    	lappend res "$d = [clock format $d -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]"
+    }
+    set res
+} [split [regsub -all {^\n|\n$} {
+1459033200 = 2016-03-27 00:00:00 CET
+1459036800 = 2016-03-27 01:00:00 CET
+1459040400 = 2016-03-27 03:00:00 CEST
+1459044000 = 2016-03-27 04:00:00 CEST
+#--
+1459044000 = 2016-03-27 04:00:00 CEST
+1459040400 = 2016-03-27 03:00:00 CEST
+1459036800 = 2016-03-27 01:00:00 CET
+1459033200 = 2016-03-27 00:00:00 CET
+} {}] \n]
+
+test clock-34.54.2 {check date in DST-hole: daylight switch CEST -> CET} {
+    set res {}
+    # forwards
+    set base 1477782000
+    for {set i 0} {$i <= 3} {incr i} {
+    	set d [clock scan "+$i hour" -base $base -timezone CET]
+    	lappend res "$d = [clock format $d -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]"
+    }
+    lappend res "#--"
+    # backwards
+    set base 1477792800
+    for {set i 0} {$i <= 3} {incr i} {
+    	set d [clock scan "-$i hour" -base $base -timezone CET]
+    	lappend res "$d = [clock format $d -timezone CET -format {%Y-%m-%d %H:%M:%S %Z}]"
+    }
+    set res
+} [split [regsub -all {^\n|\n$} {
+1477782000 = 2016-10-30 01:00:00 CEST
+1477785600 = 2016-10-30 02:00:00 CEST
+1477789200 = 2016-10-30 02:00:00 CET
+1477792800 = 2016-10-30 03:00:00 CET
+#--
+1477792800 = 2016-10-30 03:00:00 CET
+1477789200 = 2016-10-30 02:00:00 CET
+1477785600 = 2016-10-30 02:00:00 CEST
+1477782000 = 2016-10-30 01:00:00 CEST
+} {}] \n]
 
 # clock seconds
 test clock-35.1 {clock seconds tests} {
@@ -35865,13 +36233,33 @@ test clock-36.3 {clock scan next monthname} {
 } "05.2001"
 
 test clock-37.1 {%s gmt testing} {
-    set s [clock seconds]
+    set s [clock scan "2017-05-10 09:00:00" -gmt 1]
     set a [clock format $s -format %s -gmt 0]
     set b [clock format $s -format %s -gmt 1]
+    set c [clock scan $s -format %s -gmt 0]
+    set d [clock scan $s -format %s -gmt 1]
     # %s, being the difference between local and Greenwich, does not
     # depend on the time zone.
-    set c [expr {$b-$a}]
-} {0}
+    list [expr {$b-$a}] [expr {$d-$c}]
+} {0 0}
+test clock-37.2 {%Es gmt testing CET} {
+    set s [clock scan "2017-01-10 09:00:00" -gmt 1]
+    set a [clock format $s -format %Es -timezone CET]
+    set b [clock format $s -format %Es -gmt 1]
+    set c [clock scan $s -format %Es -timezone CET]
+    set d [clock scan $s -format %Es -gmt 1]
+    # %Es depend on the time zone (local seconds instead of posix seconds).
+    list [expr {$b-$a}] [expr {$d-$c}]
+} {-3600 3600}
+test clock-37.3 {%Es gmt testing CEST} {
+    set s [clock scan "2017-05-10 09:00:00" -gmt 1]
+    set a [clock format $s -format %Es -timezone CET]
+    set b [clock format $s -format %Es -gmt 1]
+    set c [clock scan $s -format %Es -timezone CET]
+    set d [clock scan $s -format %Es -gmt 1]
+    # %Es depend on the time zone (local seconds instead of posix seconds).
+    list [expr {$b-$a}] [expr {$d-$c}]
+} {-7200 7200}
 
 test clock-38.1 {regression - convertUTCToLocalViaC - east of Greenwich} \
     -setup {
@@ -35924,7 +36312,7 @@ test clock-38.2 {make sure TZ is not cached after unset} \
         }
     } \
     -result 1
-        
+
 
 test clock-39.1 {regression - synonym timezones} {
     clock format 0 -format {%H:%M:%S} -timezone :US/Eastern
@@ -35996,7 +36384,7 @@ test clock-44.1 {regression test - time zone name containing hyphen } \
 	}
     } \
     -result {12:34:56-0500}
-    
+
 test clock-45.1 {regression test - time zone containing only two digits} \
     -body {
 	clock scan 1985-04-12T10:15:30+04 -format %Y-%m-%dT%H:%M:%S%Z
@@ -36041,7 +36429,7 @@ test clock-48.1 {Bug 1185933: 'i' destroyed by clock init} -setup {
 
 test clock-49.1 {regression test - localtime with negative arg (Bug 1237907)} \
     -body {
-	list [catch { 
+	list [catch {
 	    clock format -86400 -timezone :localtime -format %Y
 	} result] $result
     } \
@@ -36280,7 +36668,7 @@ test clock-56.1 {use of zoneinfo, version 1} {*}{
     }
     -result {2004-01-01 00:00:00 MST}
 }
-	    
+
 test clock-56.2 {use of zoneinfo, version 2} {*}{
     -setup {
 	clock format [clock seconds]
@@ -36330,7 +36718,7 @@ test clock-56.2 {use of zoneinfo, version 2} {*}{
 	removeFile PhoenixTwo $tzdir2
 	removeDirectory Test $tzdir
 	removeDirectory zoneinfo
-    } 
+    }
     -body {
 	clock format 1072940400 -timezone :Test/PhoenixTwo \
 	    -format {%Y-%m-%d %H:%M:%S %Z}
@@ -36540,7 +36928,7 @@ test clock-56.3 {use of zoneinfo, version 2, Y2038 compliance} {*}{
 	removeFile TijuanaTwo $tzdir2
 	removeDirectory Test $tzdir
 	removeDirectory zoneinfo
-    } 
+    }
     -body {
 	clock format 2224738800 -timezone :Test/TijuanaTwo \
 	    -format {%Y-%m-%d %H:%M:%S %Z}
@@ -36692,7 +37080,7 @@ test clock-56.4 {Bug 3470928} {*}{
 	removeFile Windhoek $tzdir2
 	removeDirectory Test $tzdir
 	removeDirectory zoneinfo
-    } 
+    }
     -result {Sun Jan 08 22:30:06 WAST 2012}
 }
 
@@ -36703,7 +37091,7 @@ test clock-57.1 {clock scan - abbreviated options} {
 test clock-58.1 {clock l10n - Japanese localisation} {*}{
     -setup {
 	proc backslashify { string } {
-	    
+
 	    set retval {}
 	    foreach char [split $string {}] {
 		scan $char %c ccode
@@ -36809,52 +37197,52 @@ test clock-59.1 {military time zones} {
 
 test clock-60.1 {case insensitive weekday names} {
     clock scan "2000-W01 monday" -gmt true -format "%G-W%V %a"
-} [clock scan "2000-W01-1" -gmt true -format "%G-W%V-%u"] 
+} [clock scan "2000-W01-1" -gmt true -format "%G-W%V-%u"]
 test clock-60.2 {case insensitive weekday names} {
     clock scan "2000-W01 Monday" -gmt true -format "%G-W%V %a"
-} [clock scan "2000-W01-1" -gmt true -format "%G-W%V-%u"] 
+} [clock scan "2000-W01-1" -gmt true -format "%G-W%V-%u"]
 test clock-60.3 {case insensitive weekday names} {
     clock scan "2000-W01 MONDAY" -gmt true -format "%G-W%V %a"
-} [clock scan "2000-W01-1" -gmt true -format "%G-W%V-%u"] 
+} [clock scan "2000-W01-1" -gmt true -format "%G-W%V-%u"]
 test clock-60.4 {case insensitive weekday names} {
     clock scan "2000-W01 friday" -gmt true -format "%G-W%V %a"
-} [clock scan "2000-W01-5" -gmt true -format "%G-W%V-%u"] 
+} [clock scan "2000-W01-5" -gmt true -format "%G-W%V-%u"]
 test clock-60.5 {case insensitive weekday names} {
     clock scan "2000-W01 Friday" -gmt true -format "%G-W%V %a"
-} [clock scan "2000-W01-5" -gmt true -format "%G-W%V-%u"] 
+} [clock scan "2000-W01-5" -gmt true -format "%G-W%V-%u"]
 test clock-60.6 {case insensitive weekday names} {
     clock scan "2000-W01 FRIDAY" -gmt true -format "%G-W%V %a"
-} [clock scan "2000-W01-5" -gmt true -format "%G-W%V-%u"] 
+} [clock scan "2000-W01-5" -gmt true -format "%G-W%V-%u"]
 test clock-60.7 {case insensitive month names} {
     clock scan "1 january 2000" -gmt true -format "%d %b %Y"
-} [clock scan "2000-01-01" -gmt true -format "%Y-%m-%d"] 
+} [clock scan "2000-01-01" -gmt true -format "%Y-%m-%d"]
 test clock-60.8 {case insensitive month names} {
     clock scan "1 January 2000" -gmt true -format "%d %b %Y"
-} [clock scan "2000-01-01" -gmt true -format "%Y-%m-%d"] 
+} [clock scan "2000-01-01" -gmt true -format "%Y-%m-%d"]
 test clock-60.9 {case insensitive month names} {
     clock scan "1 JANUARY 2000" -gmt true -format "%d %b %Y"
-} [clock scan "2000-01-01" -gmt true -format "%Y-%m-%d"] 
+} [clock scan "2000-01-01" -gmt true -format "%Y-%m-%d"]
 test clock-60.10 {case insensitive month names} {
     clock scan "1 december 2000" -gmt true -format "%d %b %Y"
-} [clock scan "2000-12-01" -gmt true -format "%Y-%m-%d"] 
+} [clock scan "2000-12-01" -gmt true -format "%Y-%m-%d"]
 test clock-60.11 {case insensitive month names} {
     clock scan "1 December 2000" -gmt true -format "%d %b %Y"
-} [clock scan "2000-12-01" -gmt true -format "%Y-%m-%d"] 
+} [clock scan "2000-12-01" -gmt true -format "%Y-%m-%d"]
 test clock-60.12 {case insensitive month names} {
     clock scan "1 DECEMBER 2000" -gmt true -format "%d %b %Y"
-} [clock scan "2000-12-01" -gmt true -format "%Y-%m-%d"] 
+} [clock scan "2000-12-01" -gmt true -format "%Y-%m-%d"]
 
 test clock-61.1 {overflow of a wide integer on output} {*}{
     -body {
 	clock format 0x8000000000000000 -format %s -gmt true
-    } 
+    }
     -result {integer value too large to represent}
     -returnCodes error
 }
 test clock-61.2 {overflow of a wide integer on output} {*}{
     -body {
 	clock format -0x8000000000000001 -format %s -gmt true
-    } 
+    }
     -result {integer value too large to represent}
     -returnCodes error
 }
diff --git a/tests/msgcat.test b/tests/msgcat.test
index 1c3ce58..584e420 100644
--- a/tests/msgcat.test
+++ b/tests/msgcat.test
@@ -811,7 +811,7 @@ namespace eval ::msgcat::test {
 	test msgcat-12.1 {mcpackagelocale no subcommand} -body {
 	    mcpackagelocale
 	} -returnCodes 1\
-	-result {wrong # args: should be "mcpackagelocale subcommand ?locale?"}
+	-result {wrong # args: should be "mcpackagelocale subcommand ?locale? ?ns?"}
 
 	test msgcat-12.2 {mclpackagelocale wrong subcommand} -body {
 	    mcpackagelocale junk
diff --git a/unix/Makefile.in b/unix/Makefile.in
index fe9ca40..eda50de 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -292,7 +292,7 @@ XTTEST_OBJS = xtTestInit.o tclTest.o tclTestObj.o tclTestProcBodyObj.o \
 
 GENERIC_OBJS = regcomp.o regexec.o regfree.o regerror.o tclAlloc.o \
 	tclAssembly.o tclAsync.o tclBasic.o tclBinary.o tclCkalloc.o \
-	tclClock.o tclCmdAH.o tclCmdIL.o tclCmdMZ.o \
+	tclClock.o tclClockFmt.o tclCmdAH.o tclCmdIL.o tclCmdMZ.o \
 	tclCompCmds.o tclCompCmdsGR.o tclCompCmdsSZ.o tclCompExpr.o \
 	tclCompile.o tclConfig.o tclDate.o tclDictObj.o tclDisassemble.o \
 	tclEncoding.o tclEnsemble.o \
@@ -304,7 +304,7 @@ GENERIC_OBJS = regcomp.o regexec.o regfree.o regerror.o tclAlloc.o \
 	tclObj.o tclOptimize.o tclPanic.o tclParse.o tclPathObj.o tclPipe.o \
 	tclPkg.o tclPkgConfig.o tclPosixStr.o \
 	tclPreserve.o tclProc.o tclRegexp.o \
-	tclResolve.o tclResult.o tclScan.o tclStringObj.o \
+	tclResolve.o tclResult.o tclScan.o tclStringObj.o tclStrIdxTree.o \
 	tclStrToD.o tclThread.o \
 	tclThreadAlloc.o tclThreadJoin.o tclThreadStorage.o tclStubInit.o \
 	tclTimer.o tclTrace.o tclUtf.o tclUtil.o tclVar.o tclZlib.o \
@@ -396,6 +396,7 @@ GENERIC_SRCS = \
 	$(GENERIC_DIR)/tclBinary.c \
 	$(GENERIC_DIR)/tclCkalloc.c \
 	$(GENERIC_DIR)/tclClock.c \
+	$(GENERIC_DIR)/tclClockFmt.c \
 	$(GENERIC_DIR)/tclCmdAH.c \
 	$(GENERIC_DIR)/tclCmdIL.c \
 	$(GENERIC_DIR)/tclCmdMZ.c \
@@ -450,6 +451,7 @@ GENERIC_SRCS = \
 	$(GENERIC_DIR)/tclScan.c \
 	$(GENERIC_DIR)/tclStubInit.c \
 	$(GENERIC_DIR)/tclStringObj.c \
+	$(GENERIC_DIR)/tclStrIdxTree.c \
 	$(GENERIC_DIR)/tclStrToD.c \
 	$(GENERIC_DIR)/tclTest.c \
 	$(GENERIC_DIR)/tclTestObj.c \
@@ -1072,6 +1074,9 @@ tclCkalloc.o: $(GENERIC_DIR)/tclCkalloc.c
 tclClock.o: $(GENERIC_DIR)/tclClock.c
 	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclClock.c
 
+tclClockFmt.o: $(GENERIC_DIR)/tclClockFmt.c
+	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclClockFmt.c
+
 tclCmdAH.o: $(GENERIC_DIR)/tclCmdAH.c
 	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclCmdAH.c
 
@@ -1300,6 +1305,9 @@ tclScan.o: $(GENERIC_DIR)/tclScan.c
 tclStringObj.o: $(GENERIC_DIR)/tclStringObj.c $(MATHHDRS)
 	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclStringObj.c
 
+tclStrIdxTree.o: $(GENERIC_DIR)/tclStrIdxTree.c $(MATHHDRS)
+	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclStrIdxTree.c
+
 tclStrToD.o: $(GENERIC_DIR)/tclStrToD.c $(MATHHDRS)
 	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclStrToD.c
 
diff --git a/unix/tclUnixTime.c b/unix/tclUnixTime.c
index 6a3766d..375e366 100644
--- a/unix/tclUnixTime.c
+++ b/unix/tclUnixTime.c
@@ -84,6 +84,32 @@ TclpGetSeconds(void)
 /*
  *----------------------------------------------------------------------
  *
+ * TclpGetMicroseconds --
+ *
+ *	This procedure returns the number of microseconds from the epoch.
+ *	On most Unix systems the epoch is Midnight Jan 1, 1970 GMT.
+ *
+ * Results:
+ *	Number of microseconds from the epoch.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_WideInt
+TclpGetMicroseconds(void)
+{
+    Tcl_Time time;
+
+    tclGetTimeProcPtr(&time, tclTimeClientData);
+    return ((Tcl_WideInt)time.sec)*1000000 + time.usec;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * TclpGetClicks --
  *
  *	This procedure returns a value that represents the highest resolution
@@ -216,6 +242,51 @@ TclpWideClicksToNanoseconds(
 
     return nsec;
 }
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpWideClickInMicrosec --
+ *
+ *	This procedure return scale to convert click values from the 
+ *	TclpGetWideClicks native resolution to microsecond resolution
+ *	and back.
+ *
+ * Results:
+ * 	1 click in microseconds as double.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+double
+TclpWideClickInMicrosec(void)
+{
+    if (tclGetTimeProcPtr != NativeGetTime) {
+	return 1.0;
+    } else {
+#ifdef MAC_OSX_TCL
+	static int initialized = 0;
+	static double scale = 0.0;
+
+	if (initialized) {
+	    return scale;
+	} else {
+	    mach_timebase_info_data_t tb;
+
+	    mach_timebase_info(&tb);
+	    /* value of tb.numer / tb.denom = 1 click in nanoseconds */
+	    scale = ((double)tb.numer) / tb.denom / 1000;
+	    initialized = 1;
+	    return scale;
+	}
+#else
+#error Wide high-resolution clicks not implemented on this platform
+#endif
+    }
+}
 #endif /* TCL_WIDE_CLICKS */
 
 /*
diff --git a/win/Makefile.in b/win/Makefile.in
index 71df19a..5e7d613 100644
--- a/win/Makefile.in
+++ b/win/Makefile.in
@@ -228,6 +228,7 @@ GENERIC_OBJS = \
 	tclBinary.$(OBJEXT) \
 	tclCkalloc.$(OBJEXT) \
 	tclClock.$(OBJEXT) \
+	tclClockFmt.$(OBJEXT) \
 	tclCmdAH.$(OBJEXT) \
 	tclCmdIL.$(OBJEXT) \
 	tclCmdMZ.$(OBJEXT) \
@@ -290,6 +291,7 @@ GENERIC_OBJS = \
 	tclResult.$(OBJEXT) \
 	tclScan.$(OBJEXT) \
 	tclStringObj.$(OBJEXT) \
+	tclStrIdxTree.$(OBJEXT) \
 	tclStrToD.$(OBJEXT) \
 	tclStubInit.$(OBJEXT) \
 	tclThread.$(OBJEXT) \
diff --git a/win/makefile.vc b/win/makefile.vc
index ada08cc..555357e 100644
--- a/win/makefile.vc
+++ b/win/makefile.vc
@@ -1,1242 +1,1244 @@
-#-------------------------------------------------------------

-# makefile.vc --

-#

-#	Microsoft Visual C++ makefile for use with nmake.exe v1.62+ (VC++ 5.0+)

-#

-# See the file "license.terms" for information on usage and redistribution

-# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

-#

-# Copyright (c) 1995-1996 Sun Microsystems, Inc.

-# Copyright (c) 1998-2000 Ajuba Solutions.

-# Copyright (c) 2001-2005 ActiveState Corporation.

-# Copyright (c) 2001-2004 David Gravereaux.

-# Copyright (c) 2003-2008 Pat Thoyts.

-#------------------------------------------------------------------------------

-

-# Check to see we are configured to build with MSVC (MSDEVDIR, MSVCDIR or

-# VCINSTALLDIR) or with the MS Platform SDK (MSSDK or WindowsSDKDir)

-!if !defined(MSDEVDIR) && !defined(MSVCDIR) && !defined(VCINSTALLDIR) && !defined(MSSDK) && !defined(WINDOWSSDKDIR)

-MSG = ^

-You need to run vcvars32.bat from Developer Studio or setenv.bat from the^

-Platform SDK first to setup the environment.  Jump to this line to read^

-the build instructions.

-!error $(MSG)

-!endif

-

-#------------------------------------------------------------------------------

-# HOW TO USE this makefile:

-#

-# 1)  It is now necessary to have MSVCDir, MSDevDir or MSSDK set in the

-#     environment.  This is used as a check to see if vcvars32.bat had been

-#     run prior to running nmake or during the installation of Microsoft

-#     Visual C++, MSVCDir had been set globally and the PATH adjusted.

-#     Either way is valid.

-#

-#     You'll need to run vcvars32.bat contained in the MsDev's vc(98)/bin

-#     directory to setup the proper environment, if needed, for your

-#     current setup.  This is a needed bootstrap requirement and allows the

-#     swapping of different environments to be easier.

-#

-# 2)  To use the Platform SDK (not expressly needed), run setenv.bat after

-#     vcvars32.bat according to the instructions for it.  This can also

-#     turn on the 64-bit compiler, if your SDK has it.

-#

-# 3)  Targets are:

-#	release  -- Builds the core, the shell and the dlls. (default)

-#	dlls     -- Just builds the windows extensions

-#	shell    -- Just builds the shell and the core.

-#	core     -- Only builds the core [tclXX.(dll|lib)].

-#	all      -- Builds everything.

-#	test     -- Builds and runs the test suite.

-#	tcltest  -- Just builds the test shell.

-#	install  -- Installs the built binaries and libraries to $(INSTALLDIR)

-#		    as the root of the install tree.

-#	tidy/clean/hose -- varying levels of cleaning.

-#	genstubs -- Rebuilds the Stubs table and support files (dev only).

-#	depend   -- Generates an accurate set of source dependancies for this

-#		    makefile.  Helpful to avoid problems when the sources are

-#		    refreshed and you rebuild, but can "overbuild" when common

-#		    headers like tclInt.h just get small changes.

-#	htmlhelp -- Builds a Windows .chm help file for Tcl and Tk from the

-#		    troff manual pages found in $(ROOT)\doc. You need to

-#		    have installed the HTML Help Compiler package from Microsoft

-#		    to produce the .chm file.

-#	winhelp  -- (deprecated) Builds the windows .hlp file for Tcl from

-#		    the troff man files found in $(ROOT)\doc. This type of

-#		    help file is deprecated by Microsoft in favour of html

-#		    help files (.chm)

-#

-# 4)  Macros usable on the commandline:

-#	INSTALLDIR=<path>

-#		Sets where to install Tcl from the built binaries.

-#		C:\Progra~1\Tcl is assumed when not specified.

-#

-#	OPTS=loimpact,msvcrt,nothreads,pdbs,profile,static,staticpkg,symbols,thrdalloc,tclalloc,unchecked,none

-#		Sets special options for the core.  The default is for none.

-#		Any combination of the above may be used (comma separated).

-#		'none' will over-ride everything to nothing.

-#

-#		loimpact = Adds a flag for how NT treats the heap to keep memory

-#			   in use, low.  This is said to impact alloc performance.

-#		msvcrt   = Affects the static option only to switch it from

-#			   using libcmt(d) as the C runtime [by default] to

-#			   msvcrt(d). This is useful for static embedding

-#			   support.

-#		nothreads= Turns off full multithreading support.

-#		pdbs     = Build detached symbols for release builds.

-#		profile  = Adds profiling hooks.  Map file is assumed.

-#		static   = Builds a static library of the core instead of a

-#			   dll.  The static library will contain the dde and reg

-#			   extensions. External applications who want to use

-#			   this, need to link with the stub library as well as

-#			   the static Tcl library.The shell will be static (and

-#			   large), as well.

-#		staticpkg = Affects the static option only to switch

-#			   tclshXX.exe to have the dde and reg extension linked

-#			   inside it.

-#		symbols  = Debug build. Links to the debug C runtime, disables

-#			   optimizations and creates pdb symbols files.

-#		thrdalloc = Use the thread allocator (shared global free pool)

-#			   This is the default on threaded builds.

-#		tclalloc = Use the old non-thread allocator

-#		unchecked= Allows a symbols build to not use the debug

-#			   enabled runtime (msvcrt.dll not msvcrtd.dll

-#			   or libcmt.lib not libcmtd.lib).

-#

-#	STATS=compdbg,memdbg,none

-#		Sets optional memory and bytecode compiler debugging code added

-#		to the core.  The default is for none.  Any combination of the

-#		above may be used (comma separated).  'none' will over-ride

-#		everything to nothing.

-#

-#		compdbg  = Enables byte compilation logging.

-#		memdbg   = Enables the debugging memory allocator.

-#

-#	CHECKS=64bit,fullwarn,nodep,none

-#		Sets special macros for checking compatibility.

-#

-#		64bit    = Enable 64bit portability warnings (if available)

-#		fullwarn = Builds with full compiler and link warnings enabled.

-#			    Very verbose.

-#		nodep	 = Turns off compatibility macros to ensure the core

-#			    isn't being built with deprecated functions.

-#

-#	MACHINE=(ALPHA|AMD64|IA64|IX86)

-#		Set the machine type used for the compiler, linker, and

-#		resource compiler.  This hook is needed to tell the tools

-#		when alternate platforms are requested.  IX86 is the default

-#		when not specified. If the CPU environment variable has been

-#		set (ie: recent Platform SDK) then MACHINE is set from CPU.

-#

-#	TMP_DIR=<path>

-#	OUT_DIR=<path>

-#		Hooks to allow the intermediate and output directories to be

-#		changed.  $(OUT_DIR) is assumed to be

-#		$(BINROOT)\(Release|Debug) based on if symbols are requested.

-#		$(TMP_DIR) will de $(OUT_DIR)\<buildtype> by default.

-#

-#	TESTPAT=<file>

-#		Reads the tests requested to be run from this file.

-#

-#	CFG_ENCODING=encoding

-#		name of encoding for configuration information. Defaults

-#		to cp1252

-#

-# 5)  Examples:

-#

-#	Basic syntax of calling nmake looks like this:

-#	nmake [-nologo] -f makefile.vc [target|macrodef [target|macrodef] [...]]

-#

-#                        Standard (no frills)

-#       c:\tcl_src\win\>c:\progra~1\micros~1\vc98\bin\vcvars32.bat

-#       Setting environment for using Microsoft Visual C++ tools.

-#       c:\tcl_src\win\>nmake -f makefile.vc release

-#       c:\tcl_src\win\>nmake -f makefile.vc install INSTALLDIR=c:\progra~1\tcl

-#

-#                         Building for Win64

-#       c:\tcl_src\win\>c:\progra~1\micros~1\vc98\bin\vcvars32.bat

-#       Setting environment for using Microsoft Visual C++ tools.

-#       c:\tcl_src\win\>c:\progra~1\platfo~1\setenv.bat /pre64 /RETAIL

-#       Targeting Windows pre64 RETAIL

-#       c:\tcl_src\win\>nmake -f makefile.vc MACHINE=IA64

-#

-#------------------------------------------------------------------------------

-#==============================================================================

-###############################################################################

-

-

-#    //==================================================================\\

-#   >>[               -> Do not modify below this line. <-               ]<<

-#   >>[  Please, use the commandline macros to modify how Tcl is built.  ]<<

-#   >>[  If you need more features, send us a patch for more macros.     ]<<

-#    \\==================================================================//

-

-

-###############################################################################

-#==============================================================================

-#------------------------------------------------------------------------------

-

-!if !exist("makefile.vc")

-MSG = ^

-You must run this makefile only from the directory it is in.^

-Please `cd` to its location first.

-!error $(MSG)

-!endif

-

-PROJECT = tcl

-!include "rules.vc"

-

-STUBPREFIX      = $(PROJECT)stub

-DOTVERSION      = $(TCL_MAJOR_VERSION).$(TCL_MINOR_VERSION)

-VERSION         = $(TCL_MAJOR_VERSION)$(TCL_MINOR_VERSION)

-

-DDEDOTVERSION = 1.4

-DDEVERSION = $(DDEDOTVERSION:.=)

-

-REGDOTVERSION = 1.3

-REGVERSION = $(REGDOTVERSION:.=)

-

-BINROOT		= $(MAKEDIR)     # originally .

-ROOT		= $(MAKEDIR)\..  # originally ..

-

-TCLIMPLIB	= $(OUT_DIR)\$(PROJECT)$(VERSION)$(SUFX).lib

-TCLLIBNAME	= $(PROJECT)$(VERSION)$(SUFX).$(EXT)

-TCLLIB		= $(OUT_DIR)\$(TCLLIBNAME)

-

-TCLSTUBLIBNAME	= $(STUBPREFIX)$(VERSION).lib

-TCLSTUBLIB	= $(OUT_DIR)\$(TCLSTUBLIBNAME)

-

-TCLSHNAME	= $(PROJECT)sh$(VERSION)$(SUFX).exe

-TCLSH		= $(OUT_DIR)\$(TCLSHNAME)

-

-TCLREGLIBNAME	= $(PROJECT)reg$(REGVERSION)$(SUFX:t=).$(EXT)

-TCLREGLIB	= $(OUT_DIR)\$(TCLREGLIBNAME)

-

-TCLDDELIBNAME	= $(PROJECT)dde$(DDEVERSION)$(SUFX:t=).$(EXT)

-TCLDDELIB	= $(OUT_DIR)\$(TCLDDELIBNAME)

-

-TCLTEST		= $(OUT_DIR)\$(PROJECT)test.exe

-CAT32		= $(OUT_DIR)\cat32.exe

-

-# Can we run what we build? IX86 runs on all architectures.

-!ifndef TCLSH_NATIVE

-!if "$(MACHINE)" == "IX86" || "$(MACHINE)" == "$(NATIVE_ARCH)"

-TCLSH_NATIVE	= $(TCLSH)

-!else

-!error You must explicitly set TCLSH_NATIVE for cross-compilation

-!endif

-!endif

-

-### Make sure we use backslash only.

-LIB_INSTALL_DIR		= $(_INSTALLDIR)\lib

-BIN_INSTALL_DIR		= $(_INSTALLDIR)\bin

-DOC_INSTALL_DIR		= $(_INSTALLDIR)\doc

-SCRIPT_INSTALL_DIR	= $(_INSTALLDIR)\lib\tcl$(DOTVERSION)

-INCLUDE_INSTALL_DIR	= $(_INSTALLDIR)\include

-

-TCLSHOBJS = \

-	$(TMP_DIR)\tclAppInit.obj \

-!if !$(STATIC_BUILD)

-!if $(TCL_USE_STATIC_PACKAGES)

-	$(TMP_DIR)\tclWinReg.obj \

-	$(TMP_DIR)\tclWinDde.obj \

-!endif

-!endif

-	$(TMP_DIR)\tclsh.res

-

-TCLTESTOBJS = \

-	$(TMP_DIR)\tclTest.obj \

-	$(TMP_DIR)\tclTestObj.obj \

-	$(TMP_DIR)\tclTestProcBodyObj.obj \

-	$(TMP_DIR)\tclThreadTest.obj \

-	$(TMP_DIR)\tclWinTest.obj \

-!if !$(STATIC_BUILD)

-!if $(TCL_USE_STATIC_PACKAGES)

-	$(TMP_DIR)\tclWinReg.obj \

-	$(TMP_DIR)\tclWinDde.obj \

-!endif

-!endif

-	$(TMP_DIR)\testMain.obj

-

-COREOBJS = \

-	$(TMP_DIR)\regcomp.obj \

-	$(TMP_DIR)\regerror.obj \

-	$(TMP_DIR)\regexec.obj \

-	$(TMP_DIR)\regfree.obj \

-	$(TMP_DIR)\tclAlloc.obj \

-	$(TMP_DIR)\tclAssembly.obj \

-	$(TMP_DIR)\tclAsync.obj \

-	$(TMP_DIR)\tclBasic.obj \

-	$(TMP_DIR)\tclBinary.obj \

-	$(TMP_DIR)\tclCkalloc.obj \

-	$(TMP_DIR)\tclClock.obj \

-	$(TMP_DIR)\tclCmdAH.obj \

-	$(TMP_DIR)\tclCmdIL.obj \

-	$(TMP_DIR)\tclCmdMZ.obj \

-	$(TMP_DIR)\tclCompCmds.obj \

-	$(TMP_DIR)\tclCompCmdsGR.obj \

-	$(TMP_DIR)\tclCompCmdsSZ.obj \

-	$(TMP_DIR)\tclCompExpr.obj \

-	$(TMP_DIR)\tclCompile.obj \

-	$(TMP_DIR)\tclConfig.obj \

-	$(TMP_DIR)\tclDate.obj \

-	$(TMP_DIR)\tclDictObj.obj \

-	$(TMP_DIR)\tclDisassemble.obj \

-	$(TMP_DIR)\tclEncoding.obj \

-	$(TMP_DIR)\tclEnsemble.obj \

-	$(TMP_DIR)\tclEnv.obj \

-	$(TMP_DIR)\tclEvent.obj \

-	$(TMP_DIR)\tclExecute.obj \

-	$(TMP_DIR)\tclFCmd.obj \

-	$(TMP_DIR)\tclFileName.obj \

-	$(TMP_DIR)\tclGet.obj \

-	$(TMP_DIR)\tclHash.obj \

-	$(TMP_DIR)\tclHistory.obj \

-	$(TMP_DIR)\tclIndexObj.obj \

-	$(TMP_DIR)\tclInterp.obj \

-	$(TMP_DIR)\tclIO.obj \

-	$(TMP_DIR)\tclIOCmd.obj \

-	$(TMP_DIR)\tclIOGT.obj \

-	$(TMP_DIR)\tclIOSock.obj \

-	$(TMP_DIR)\tclIOUtil.obj \

-	$(TMP_DIR)\tclIORChan.obj \

-	$(TMP_DIR)\tclIORTrans.obj \

-	$(TMP_DIR)\tclLink.obj \

-	$(TMP_DIR)\tclListObj.obj \

-	$(TMP_DIR)\tclLiteral.obj \

-	$(TMP_DIR)\tclLoad.obj \

-	$(TMP_DIR)\tclMain.obj \

-	$(TMP_DIR)\tclMain2.obj \

-	$(TMP_DIR)\tclNamesp.obj \

-	$(TMP_DIR)\tclNotify.obj \

-	$(TMP_DIR)\tclOO.obj \

-	$(TMP_DIR)\tclOOBasic.obj \

-	$(TMP_DIR)\tclOOCall.obj \

-	$(TMP_DIR)\tclOODefineCmds.obj \

-	$(TMP_DIR)\tclOOInfo.obj \

-	$(TMP_DIR)\tclOOMethod.obj \

-	$(TMP_DIR)\tclOOStubInit.obj \

-	$(TMP_DIR)\tclObj.obj \

-	$(TMP_DIR)\tclOptimize.obj \

-	$(TMP_DIR)\tclPanic.obj \

-	$(TMP_DIR)\tclParse.obj \

-	$(TMP_DIR)\tclPathObj.obj \

-	$(TMP_DIR)\tclPipe.obj \

-	$(TMP_DIR)\tclPkg.obj \

-	$(TMP_DIR)\tclPkgConfig.obj \

-	$(TMP_DIR)\tclPosixStr.obj \

-	$(TMP_DIR)\tclPreserve.obj \

-	$(TMP_DIR)\tclProc.obj \

-	$(TMP_DIR)\tclRegexp.obj \

-	$(TMP_DIR)\tclResolve.obj \

-	$(TMP_DIR)\tclResult.obj \

-	$(TMP_DIR)\tclScan.obj \

-	$(TMP_DIR)\tclStringObj.obj \

-	$(TMP_DIR)\tclStrToD.obj \

-	$(TMP_DIR)\tclStubInit.obj \

-	$(TMP_DIR)\tclThread.obj \

-	$(TMP_DIR)\tclThreadAlloc.obj \

-	$(TMP_DIR)\tclThreadJoin.obj \

-	$(TMP_DIR)\tclThreadStorage.obj \

-	$(TMP_DIR)\tclTimer.obj \

-	$(TMP_DIR)\tclTomMathInterface.obj \

-	$(TMP_DIR)\tclTrace.obj \

-	$(TMP_DIR)\tclUtf.obj \

-	$(TMP_DIR)\tclUtil.obj \

-	$(TMP_DIR)\tclVar.obj \

-	$(TMP_DIR)\tclZlib.obj

-

-ZLIBOBJS = \

-	$(TMP_DIR)\adler32.obj \

-	$(TMP_DIR)\compress.obj \

-	$(TMP_DIR)\crc32.obj \

-	$(TMP_DIR)\deflate.obj \

-	$(TMP_DIR)\infback.obj \

-	$(TMP_DIR)\inffast.obj \

-	$(TMP_DIR)\inflate.obj \

-	$(TMP_DIR)\inftrees.obj \

-	$(TMP_DIR)\trees.obj \

-	$(TMP_DIR)\uncompr.obj \

-	$(TMP_DIR)\zutil.obj

-

-TOMMATHOBJS = \

-	$(TMP_DIR)\bncore.obj \

-	$(TMP_DIR)\bn_reverse.obj \

-	$(TMP_DIR)\bn_fast_s_mp_mul_digs.obj \

-	$(TMP_DIR)\bn_fast_s_mp_sqr.obj \

-	$(TMP_DIR)\bn_mp_add.obj \

-	$(TMP_DIR)\bn_mp_add_d.obj \

-	$(TMP_DIR)\bn_mp_and.obj \

-	$(TMP_DIR)\bn_mp_clamp.obj \

-	$(TMP_DIR)\bn_mp_clear.obj \

-	$(TMP_DIR)\bn_mp_clear_multi.obj \

-	$(TMP_DIR)\bn_mp_cmp.obj \

-	$(TMP_DIR)\bn_mp_cmp_d.obj \

-	$(TMP_DIR)\bn_mp_cmp_mag.obj \

-	$(TMP_DIR)\bn_mp_cnt_lsb.obj \

-	$(TMP_DIR)\bn_mp_copy.obj \

-	$(TMP_DIR)\bn_mp_count_bits.obj \

-	$(TMP_DIR)\bn_mp_div.obj \

-	$(TMP_DIR)\bn_mp_div_d.obj \

-	$(TMP_DIR)\bn_mp_div_2.obj \

-	$(TMP_DIR)\bn_mp_div_2d.obj \

-	$(TMP_DIR)\bn_mp_div_3.obj \

-	$(TMP_DIR)\bn_mp_exch.obj \

-	$(TMP_DIR)\bn_mp_expt_d.obj \

-	$(TMP_DIR)\bn_mp_grow.obj \

-	$(TMP_DIR)\bn_mp_init.obj \

-	$(TMP_DIR)\bn_mp_init_copy.obj \

-	$(TMP_DIR)\bn_mp_init_multi.obj \

-	$(TMP_DIR)\bn_mp_init_set.obj \

-	$(TMP_DIR)\bn_mp_init_set_int.obj \

-	$(TMP_DIR)\bn_mp_init_size.obj \

-	$(TMP_DIR)\bn_mp_karatsuba_mul.obj \

-	$(TMP_DIR)\bn_mp_karatsuba_sqr.obj \

-	$(TMP_DIR)\bn_mp_lshd.obj \

-	$(TMP_DIR)\bn_mp_mod.obj \

-	$(TMP_DIR)\bn_mp_mod_2d.obj \

-	$(TMP_DIR)\bn_mp_mul.obj \

-	$(TMP_DIR)\bn_mp_mul_2.obj \

-	$(TMP_DIR)\bn_mp_mul_2d.obj \

-	$(TMP_DIR)\bn_mp_mul_d.obj \

-	$(TMP_DIR)\bn_mp_neg.obj \

-	$(TMP_DIR)\bn_mp_or.obj \

-	$(TMP_DIR)\bn_mp_radix_size.obj \

-	$(TMP_DIR)\bn_mp_radix_smap.obj \

-	$(TMP_DIR)\bn_mp_read_radix.obj \

-	$(TMP_DIR)\bn_mp_rshd.obj \

-	$(TMP_DIR)\bn_mp_set.obj \

-	$(TMP_DIR)\bn_mp_set_int.obj \

-	$(TMP_DIR)\bn_mp_shrink.obj \

-	$(TMP_DIR)\bn_mp_sqr.obj \

-	$(TMP_DIR)\bn_mp_sqrt.obj \

-	$(TMP_DIR)\bn_mp_sub.obj \

-	$(TMP_DIR)\bn_mp_sub_d.obj \

-	$(TMP_DIR)\bn_mp_to_unsigned_bin.obj \

-	$(TMP_DIR)\bn_mp_to_unsigned_bin_n.obj \

-	$(TMP_DIR)\bn_mp_toom_mul.obj \

-	$(TMP_DIR)\bn_mp_toom_sqr.obj \

-	$(TMP_DIR)\bn_mp_toradix_n.obj \

-	$(TMP_DIR)\bn_mp_unsigned_bin_size.obj \

-	$(TMP_DIR)\bn_mp_xor.obj \

-	$(TMP_DIR)\bn_mp_zero.obj \

-	$(TMP_DIR)\bn_s_mp_add.obj \

-	$(TMP_DIR)\bn_s_mp_mul_digs.obj \

-	$(TMP_DIR)\bn_s_mp_sqr.obj \

-	$(TMP_DIR)\bn_s_mp_sub.obj

-

-PLATFORMOBJS = \

-	$(TMP_DIR)\tclWin32Dll.obj \

-	$(TMP_DIR)\tclWinChan.obj \

-	$(TMP_DIR)\tclWinConsole.obj \

-	$(TMP_DIR)\tclWinError.obj \

-	$(TMP_DIR)\tclWinFCmd.obj \

-	$(TMP_DIR)\tclWinFile.obj \

-	$(TMP_DIR)\tclWinInit.obj \

-	$(TMP_DIR)\tclWinLoad.obj \

-	$(TMP_DIR)\tclWinNotify.obj \

-	$(TMP_DIR)\tclWinPipe.obj \

-	$(TMP_DIR)\tclWinSerial.obj \

-	$(TMP_DIR)\tclWinSock.obj \

-	$(TMP_DIR)\tclWinThrd.obj \

-	$(TMP_DIR)\tclWinTime.obj \

-!if $(STATIC_BUILD)

-	$(TMP_DIR)\tclWinReg.obj \

-	$(TMP_DIR)\tclWinDde.obj \

-!else

-	$(TMP_DIR)\tcl.res

-!endif

-

-TCLOBJS = $(COREOBJS) $(ZLIBOBJS) $(TOMMATHOBJS) $(PLATFORMOBJS)

-

-TCLSTUBOBJS = \

-	$(TMP_DIR)\tclStubLib.obj \

-	$(TMP_DIR)\tclTomMathStubLib.obj \

-	$(TMP_DIR)\tclOOStubLib.obj

-

-### The following paths CANNOT have spaces in them.

-COMPATDIR	= $(ROOT)\compat

-DOCDIR		= $(ROOT)\doc

-GENERICDIR	= $(ROOT)\generic

-TOMMATHDIR	= $(ROOT)\libtommath

-TOOLSDIR	= $(ROOT)\tools

-WINDIR		= $(ROOT)\win

-PKGSDIR		= $(ROOT)\pkgs

-

-#---------------------------------------------------------------------

-# Compile flags

-#---------------------------------------------------------------------

-

-!if !$(DEBUG)

-!if $(OPTIMIZING)

-### This cranks the optimization level to maximize speed

-cdebug	= -O2 $(OPTIMIZATIONS)

-!else

-cdebug	=

-!endif

-!if $(SYMBOLS)

-cdebug	= $(cdebug) -Zi

-!endif

-!else if "$(MACHINE)" == "IA64" || "$(MACHINE)" == "AMD64"

-### Warnings are too many, can't support warnings into errors.

-cdebug	= -Zi -Od $(DEBUGFLAGS)

-!else

-cdebug	= -Zi -WX $(DEBUGFLAGS)

-!endif

-

-### Declarations common to all compiler options

-cwarn = $(WARNINGS) -D _CRT_SECURE_NO_DEPRECATE -D _CRT_NONSTDC_NO_DEPRECATE

-cflags = -nologo -c $(COMPILERFLAGS) $(cwarn) -Fp$(TMP_DIR)^\

-

-!if $(MSVCRT)

-!if $(DEBUG) && !$(UNCHECKED)

-crt = -MDd

-!else

-crt = -MD

-!endif

-!else

-!if $(DEBUG) && !$(UNCHECKED)

-crt = -MTd

-!else

-crt = -MT

-!endif

-!endif

-

-TCL_INCLUDES	= -I"$(WINDIR)" -I"$(GENERICDIR)" -I"$(TOMMATHDIR)"

-TCL_DEFINES	= -DTCL_TOMMATH -DMP_PREC=4 -Dinline=__inline -DHAVE_ZLIB=1

-BASE_CFLAGS	= $(cflags) $(cdebug) $(crt) $(TCL_INCLUDES) $(TCL_DEFINES)

-CON_CFLAGS	= $(cflags) $(cdebug) $(crt) -DCONSOLE

-TCL_CFLAGS	= $(BASE_CFLAGS) $(OPTDEFINES)

-STUB_CFLAGS     = $(cflags) $(cdebug) $(OPTDEFINES)

-

-

-#---------------------------------------------------------------------

-# Link flags

-#---------------------------------------------------------------------

-

-!if $(DEBUG)

-ldebug	= -debug -debugtype:cv

-!else

-ldebug	= -release -opt:ref -opt:icf,3

-!if $(SYMBOLS)

-ldebug	= $(ldebug) -debug -debugtype:cv

-!endif

-!endif

-

-### Declarations common to all linker options

-lflags	= -nologo -machine:$(MACHINE) $(LINKERFLAGS) $(ldebug)

-

-!if $(PROFILE)

-lflags	= $(lflags) -profile

-!endif

-

-!if $(MSVCRT) && !($(DEBUG) && !$(UNCHECKED)) && $(VCVERSION) >= 1900

-lflags	= $(lflags) -nodefaultlib:libucrt.lib

-!endif

-

-!if $(ALIGN98_HACK) && !$(STATIC_BUILD)

-### Align sections for PE size savings.

-lflags	= $(lflags) -opt:nowin98

-!else if !$(ALIGN98_HACK) && $(STATIC_BUILD)

-### Align sections for speed in loading by choosing the virtual page size.

-lflags	= $(lflags) -align:4096

-!endif

-

-!if $(LOIMPACT)

-lflags	= $(lflags) -ws:aggressive

-!endif

-

-dlllflags = $(lflags) -dll

-conlflags = $(lflags) -subsystem:console

-guilflags = $(lflags) -subsystem:windows

-

-baselibs   = netapi32.lib kernel32.lib user32.lib advapi32.lib userenv.lib ws2_32.lib

-# Avoid 'unresolved external symbol __security_cookie' errors.

-# c.f. http://support.microsoft.com/?id=894573

-!if "$(MACHINE)" == "IA64" || "$(MACHINE)" == "AMD64"

-!if $(VCVERSION) > 1399 && $(VCVERSION) < 1500

-baselibs   = $(baselibs) bufferoverflowU.lib

-!endif

-!endif

-!if $(MSVCRT) && !($(DEBUG) && !$(UNCHECKED)) && $(VCVERSION) >= 1900

-baselibs   = $(baselibs) ucrt.lib

-!endif

-

-#---------------------------------------------------------------------

-# TclTest flags

-#---------------------------------------------------------------------

-

-!if "$(TESTPAT)" != ""

-TESTFLAGS = $(TESTFLAGS) -file $(TESTPAT)

-!endif

-

-

-#---------------------------------------------------------------------

-# Project specific targets

-#---------------------------------------------------------------------

-

-release:    setup $(TCLSH) $(TCLSTUBLIB) dlls pkgs

-core:	    setup $(TCLLIB) $(TCLSTUBLIB)

-shell:	    setup $(TCLSH)

-dlls:	    setup $(TCLREGLIB) $(TCLDDELIB)

-all:	    setup $(TCLSH) $(TCLSTUBLIB) dlls $(CAT32) pkgs

-tcltest:    setup $(TCLTEST) dlls $(CAT32)

-install:    install-binaries install-libraries install-docs install-pkgs

-

-test: test-core test-pkgs

-test-core: setup $(TCLTEST) dlls $(CAT32)

-	set TCL_LIBRARY=$(ROOT:\=/)/library

-!if "$(OS)" == "Windows_NT"  || "$(MSVCDIR)" == "IDE"

-	$(DEBUGGER) $(TCLTEST) "$(ROOT:\=/)/tests/all.tcl" $(TESTFLAGS) -loadfile <<

-		package ifneeded dde 1.4.0 [list load "$(TCLDDELIB:\=/)" dde]

-		package ifneeded registry 1.3.2 [list load "$(TCLREGLIB:\=/)" registry]

-<<

-!else

-	@echo Please wait while the tests are collected...

-	$(TCLTEST) "$(ROOT:\=/)/tests/all.tcl" $(TESTFLAGS) -loadfile << > tests.log

-		package ifneeded dde 1.4.0 "$(TCLDDELIB:\=/)" dde]

-		package ifneeded registry 1.3.2 "$(TCLREGLIB:\=/)" registry]

-<<

-	type tests.log | more

-!endif

-

-runtest: setup $(TCLTEST) dlls $(CAT32)

-	set TCL_LIBRARY=$(ROOT:\=/)/library

-	$(DEBUGGER) $(TCLTEST) $(SCRIPT)

-

-runshell: setup $(TCLSH) dlls

-	set TCL_LIBRARY=$(ROOT:\=/)/library

-	$(DEBUGGER) $(TCLSH) $(SCRIPT)

-

-setup:

-	@if not exist $(OUT_DIR)\nul mkdir $(OUT_DIR)

-	@if not exist $(TMP_DIR)\nul mkdir $(TMP_DIR)

-

-!if !$(STATIC_BUILD)

-$(TCLIMPLIB): $(TCLLIB)

-!endif

-

-$(TCLLIB): $(TCLOBJS)

-!if $(STATIC_BUILD)

-	$(lib32) -nologo $(LINKERFLAGS) -out:$@ @<<

-$**

-<<

-!else

-	$(link32) $(dlllflags) -base:@$(WINDIR)\coffbase.txt,tcl -out:$@ \

-		$(baselibs) @<<

-$**

-<<

-	$(_VC_MANIFEST_EMBED_DLL)

-!endif

-

-$(TCLSTUBLIB): $(TCLSTUBOBJS)

-	$(lib32) -nologo $(LINKERFLAGS) -nodefaultlib -out:$@ $(TCLSTUBOBJS)

-

-$(TCLSH): $(TCLSHOBJS) $(TCLSTUBLIB) $(TCLIMPLIB)

-	$(link32) $(conlflags) -stack:2300000 -out:$@ $(baselibs) $**

-	$(_VC_MANIFEST_EMBED_EXE)

-

-$(TCLTEST): $(TCLTESTOBJS) $(TCLSTUBLIB) $(TCLIMPLIB)

-	$(link32) $(conlflags) -stack:2300000 -out:$@ $(baselibs) $**

-	$(_VC_MANIFEST_EMBED_EXE)

-

-!if $(STATIC_BUILD)

-$(TCLDDELIB): $(TMP_DIR)\tclWinDde.obj

-	$(lib32) -nologo $(LINKERFLAGS) -out:$@ $**

-!else

-$(TCLDDELIB): $(TMP_DIR)\tclWinDde.obj $(TCLSTUBLIB)

-	$(link32) $(dlllflags) -base:@$(WINDIR)\coffbase.txt,tcldde -out:$@ \

-		$** $(baselibs)

-	$(_VC_MANIFEST_EMBED_DLL)

-!endif

-

-!if $(STATIC_BUILD)

-$(TCLREGLIB): $(TMP_DIR)\tclWinReg.obj

-	$(lib32) -nologo $(LINKERFLAGS) -out:$@ $**

-!else

-$(TCLREGLIB): $(TMP_DIR)\tclWinReg.obj $(TCLSTUBLIB)

-	$(link32) $(dlllflags) -base:@$(WINDIR)\coffbase.txt,tclreg -out:$@ \

-		$** $(baselibs)

-	$(_VC_MANIFEST_EMBED_DLL)

-!endif

-

-pkgs:

-	@for /d %d in ($(PKGSDIR)\*) do \

-	  @if exist "%~fd\win\makefile.vc" ( \

-	    pushd "%~fd\win" & \

-	    $(MAKE) -$(MAKEFLAGS) -f makefile.vc TCLDIR=$(ROOT) &\

-	    popd \

-	  )

-

-test-pkgs:

-	@for /d %d in ($(PKGSDIR)\*) do \

-	  @if exist "%~fd\win\makefile.vc" ( \

-	    pushd "%~fd\win" & \

-	    $(MAKE) -$(MAKEFLAGS) -f makefile.vc TCLDIR=$(ROOT) test &\

-	    popd \

-	  )

-

-install-pkgs:

-	@for /d %d in ($(PKGSDIR)\*) do \

-	  @if exist "%~fd\win\makefile.vc" ( \

-	    pushd "%~fd\win" & \

-	    $(MAKE) -$(MAKEFLAGS) -f makefile.vc TCLDIR=$(ROOT) install &\

-	    popd \

-	  )

-

-clean-pkgs:

-	@for /d %d in ($(PKGSDIR)\*) do \

-	  @if exist "%~fd\win\makefile.vc" ( \

-	    pushd "%~fd\win" & \

-	    $(MAKE) -$(MAKEFLAGS) -f makefile.vc TCLDIR=$(ROOT) clean &\

-	    popd \

-	  )

-

-$(CAT32): $(WINDIR)\cat.c

-	$(cc32) $(CON_CFLAGS) -Fo$(TMP_DIR)\ $?

-	$(link32) $(conlflags) -out:$@ -stack:16384 $(TMP_DIR)\cat.obj \

-		$(baselibs)

-	$(_VC_MANIFEST_EMBED_EXE)

-

-#---------------------------------------------------------------------

-# Regenerate the stubs files.  [Development use only]

-#---------------------------------------------------------------------

-

-genstubs:

-!if !exist($(TCLSH))

-	@echo Build tclsh first!

-!else

-	$(TCLSH) $(TOOLSDIR:\=/)/genStubs.tcl $(GENERICDIR:\=/) \

-		$(GENERICDIR:\=/)/tcl.decls $(GENERICDIR:\=/)/tclInt.decls \

-		$(GENERICDIR:\=/)/tclTomMath.decls

-	$(TCLSH) $(TOOLSDIR:\=/)/genStubs.tcl $(GENERICDIR:\=/) \

-		$(GENERICDIR:\=/)/tclOO.decls

-!endif

-

-

-#----------------------------------------------------------------------

-# The following target generates the file generic/tclTomMath.h.

-# It needs to be run (and the results checked) after updating

-# to a new release of libtommath.

-#----------------------------------------------------------------------

-

-gentommath_h:

-!if !exist($(TCLSH))

-	@echo Build tclsh first!

-!else

-	$(TCLSH) "$(TOOLSDIR:\=/)/fix_tommath_h.tcl" \

-		"$(TOMMATHDIR:\=/)/tommath.h" \

-		> "$(GENERICDIR)\tclTomMath.h"

-!endif

-

-#---------------------------------------------------------------------

-# Build the Windows HTML help file.

-#---------------------------------------------------------------------

-

-# NOTE: you can define HHC on the command-line to override this

-!ifndef HHC

-HHC=""%ProgramFiles%\HTML Help Workshop\hhc.exe""

-!endif

-HTMLDIR=$(OUT_DIR)\html

-HTMLBASE=TclTk$(VERSION)

-HHPFILE=$(HTMLDIR)\$(HTMLBASE).hhp

-CHMFILE=$(HTMLDIR)\$(HTMLBASE).chm

-

-htmlhelp: chmsetup $(CHMFILE)

-

-$(CHMFILE): $(DOCDIR)\*

-	@$(TCLSH) $(TOOLSDIR)\tcltk-man2html.tcl "--htmldir=$(HTMLDIR)"

-	@echo Compiling HTML help project

-	-$(HHC) <<$(HHPFILE) >NUL

-[OPTIONS]

-Compatibility=1.1 or later

-Compiled file=$(HTMLBASE).chm

-Default topic=contents.htm

-Display compile progress=no

-Error log file=$(HTMLBASE).log

-Full-text search=Yes

-Language=0x409 English (United States)

-Title=Tcl/Tk $(DOT_VERSION) Help

-[FILES]

-contents.htm

-docs.css

-Keywords\*.htm

-TclCmd\*.htm

-TclLib\*.htm

-TkCmd\*.htm

-TkLib\*.htm

-UserCmd\*.htm

-<<

-

-chmsetup:

-	@if not exist $(HTMLDIR)\nul mkdir $(HTMLDIR)

-

-#-------------------------------------------------------------------------

-# Build the old-style Windows .hlp file

-#-------------------------------------------------------------------------

-

-TCLHLPBASE	= $(PROJECT)$(VERSION)

-HELPFILE	= $(OUT_DIR)\$(TCLHLPBASE).hlp

-HELPCNT		= $(OUT_DIR)\$(TCLHLPBASE).cnt

-DOCTMP_DIR	= $(OUT_DIR)\$(PROJECT)_docs

-HELPRTF		= $(DOCTMP_DIR)\$(PROJECT).rtf

-MAN2HELP	= $(DOCTMP_DIR)\man2help.tcl

-MAN2HELP2	= $(DOCTMP_DIR)\man2help2.tcl

-INDEX		= $(DOCTMP_DIR)\index.tcl

-BMP		= $(DOCTMP_DIR)\feather.bmp

-BMP_NOPATH	= feather.bmp

-MAN2TCL		= $(DOCTMP_DIR)\man2tcl.exe

-

-winhelp: docsetup $(HELPFILE)

-

-docsetup:

-	@if not exist $(DOCTMP_DIR)\nul mkdir $(DOCTMP_DIR)

-

-$(MAN2HELP) $(MAN2HELP2) $(INDEX) $(BMP): $(TOOLSDIR)\$$(@F)

-	@$(CPY) $(TOOLSDIR)\$(@F) $(@D)

-

-$(HELPFILE): $(HELPRTF) $(BMP)

-	cd $(DOCTMP_DIR)

-	start /wait hcrtf.exe -x <<$(PROJECT).hpj

-[OPTIONS]

-COMPRESS=12 Hall Zeck

-LCID=0x409 0x0 0x0 ; English (United States)

-TITLE=Tcl/Tk Reference Manual

-BMROOT=.

-CNT=$(@B).cnt

-HLP=$(@B).hlp

-

-[FILES]

-$(PROJECT).rtf

-

-[WINDOWS]

-main="Tcl/Tk Reference Manual",,27648,(r15263976),(r65535)

-

-[CONFIG]

-BrowseButtons()

-CreateButton(1, "Web", ExecFile("http://www.tcl.tk"))

-CreateButton(2, "SF", ExecFile("http://sf.net/projects/tcl"))

-CreateButton(3, "Wiki", ExecFile("http://wiki.tcl.tk"))

-CreateButton(4, "FAQ", ExecFile("http://www.purl.org/NET/Tcl-FAQ/"))

-<<

-	cd $(MAKEDIR)

-	@$(CPY) "$(DOCTMP_DIR)\$(@B).hlp" "$(OUT_DIR)"

-	@$(CPY) "$(DOCTMP_DIR)\$(@B).cnt" "$(OUT_DIR)"

-

-$(MAN2TCL): $(TOOLSDIR)\$$(@B).c

-	$(cc32) $(TCL_CFLAGS) -Fo$(@D)\ $(TOOLSDIR)\$(@B).c

-	$(link32) $(conlflags) -out:$@ -stack:16384 $(@D)\man2tcl.obj

-	$(_VC_MANIFEST_EMBED_EXE)

-

-$(HELPRTF): $(MAN2TCL) $(MAN2HELP) $(MAN2HELP2) $(INDEX) $(DOCDIR)\*

-	$(TCLSH) $(MAN2HELP) -bitmap $(BMP_NOPATH) $(PROJECT) $(VERSION) $(DOCDIR:\=/)

-

-install-docs:

-!if exist("$(CHMFILE)")

-	@echo Installing compiled HTML help

-	@$(CPY) "$(CHMFILE)" "$(DOC_INSTALL_DIR)\"

-!endif

-!if exist("$(HELPFILE)")

-	@echo Installing Windows help

-	@$(CPY) "$(HELPFILE)" "$(DOC_INSTALL_DIR)\"

-	@$(CPY) "$(HELPCNT)" "$(DOC_INSTALL_DIR)\"

-!endif

-

-#---------------------------------------------------------------------

-# Build tclConfig.sh for the TEA build system.

-#---------------------------------------------------------------------

-

-tclConfig: $(OUT_DIR)\tclConfig.sh

-

-$(OUT_DIR)\tclConfig.sh: $(WINDIR)\tclConfig.sh.in

-	@echo Creating tclConfig.sh

-        @nmakehlp -s << $** >$@

-@TCL_DLL_FILE@       $(TCLLIBNAME)

-@TCL_VERSION@        $(DOTVERSION)

-@TCL_MAJOR_VERSION@  $(TCL_MAJOR_VERSION)

-@TCL_MINOR_VERSION@  $(TCL_MINOR_VERSION)

-@TCL_PATCH_LEVEL@    $(TCL_PATCH_LEVEL)

-@CC@                 $(CC)

-@DEFS@               $(TCL_CFLAGS)

-@CFLAGS_DEBUG@       -nologo -c -W3 -YX -Fp$(TMP_DIR)\ -MDd

-@CFLAGS_OPTIMIZE@    -nologo -c -W3 -YX -Fp$(TMP_DIR)\ -MD

-@LDFLAGS_DEBUG@      -nologo -machine:$(MACHINE) -debug -debugtype:cv

-@LDFLAGS_OPTIMIZE@   -nologo -machine:$(MACHINE) -release -opt:ref -opt:icf,3

-@TCL_DBGX@           $(SUFX)

-@TCL_LIB_FILE@       $(PROJECT)$(VERSION)$(SUFX).lib

-@TCL_NEEDS_EXP_FILE@

-@LIBS@               $(baselibs)

-@prefix@             $(_INSTALLDIR)

-@exec_prefix@        $(BIN_INSTALL_DIR)

-@SHLIB_CFLAGS@

-@STLIB_CFLAGS@

-@CFLAGS_WARNING@     -W3

-@EXTRA_CFLAGS@       -YX

-@SHLIB_LD@           $(link32) $(dlllflags)

-@STLIB_LD@           $(lib32) -nologo

-@SHLIB_LD_LIBS@      $(baselibs)

-@SHLIB_SUFFIX@       .dll

-@DL_LIBS@

-@LDFLAGS@

-@TCL_CC_SEARCH_FLAGS@

-@TCL_LD_SEARCH_FLAGS@

-@LIBOBJS@

-@RANLIB@

-@TCL_LIB_FLAG@

-@TCL_BUILD_LIB_SPEC@

-@TCL_LIB_SPEC@       $(LIB_INSTALL_DIR)\$(PROJECT)$(VERSION)$(SUFX).lib

-@TCL_INCLUDE_SPEC@   -I$(INCLUDE_INSTALL_DIR)

-@TCL_LIB_VERSIONS_OK@

-@TCL_SRC_DIR@        $(ROOT)

-@TCL_PACKAGE_PATH@

-@TCL_STUB_LIB_FILE@  $(TCLSTUBLIBNAME)

-@TCL_STUB_LIB_FLAG@  $(TCLSTUBLIBNAME)

-@TCL_STUB_LIB_SPEC@  -L$(LIB_INSTALL_DIR) $(TCLSTUBLIBNAME)

-@TCL_THREADS@        $(TCL_THREADS)

-@TCL_BUILD_STUB_LIB_SPEC@ -L$(OUT_DIR) $(TCLSTUBLIBNAME)

-@TCL_BUILD_STUB_LIB_PATH@ $(TCLSTUBLIB)

-@TCL_STUB_LIB_PATH@  $(LIB_INSTALL_DIR)\$(TCLSTUBLIBNAME)

-@CFG_TCL_EXPORT_FILE_SUFFIX@  $(VERSION)$(SUFX).lib

-@CFG_TCL_SHARED_LIB_SUFFIX@   $(VERSION)$(SUFX).dll

-@CFG_TCL_UNSHARED_LIB_SUFFIX@ $(VERSION)$(SUFX).lib

-!if $(STATIC_BUILD)

-@TCL_SHARED_BUILD@   0

-!else

-@TCL_SHARED_BUILD@   1

-!endif

-<<

-

-

-#---------------------------------------------------------------------

-# The following target generates the file generic/tclDate.c

-# from the yacc grammar found in generic/tclGetDate.y.  This is

-# only run by hand as yacc is not available in all environments.

-# The name of the .c file is different than the name of the .y file

-# so that make doesn't try to automatically regenerate the .c file.

-#---------------------------------------------------------------------

-

-gendate:

-	bison --output-file=$(GENERICDIR)/tclDate.c \

-	--name-prefix=TclDate \

-	$(GENERICDIR)/tclGetDate.y

-

-#---------------------------------------------------------------------

-# Special case object file targets

-#---------------------------------------------------------------------

-

-$(TMP_DIR)\testMain.obj: $(WINDIR)\tclAppInit.c

-	$(cc32) $(TCL_CFLAGS) -DTCL_TEST \

-	    -DTCL_USE_STATIC_PACKAGES=$(TCL_USE_STATIC_PACKAGES) \

-	    -Fo$@ $?

-

-$(TMP_DIR)\tclMain2.obj: $(GENERICDIR)\tclMain.c

-	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -DTCL_ASCII_MAIN \

-	    -Fo$@ $?

-

-$(TMP_DIR)\tclTest.obj: $(GENERICDIR)\tclTest.c

-	$(cc32) $(TCL_CFLAGS) -Fo$@ $?

-

-$(TMP_DIR)\tclTestObj.obj: $(GENERICDIR)\tclTestObj.c

-	$(cc32) $(TCL_CFLAGS) -Fo$@ $?

-

-$(TMP_DIR)\tclWinTest.obj: $(WINDIR)\tclWinTest.c

-	$(cc32) $(TCL_CFLAGS) -Fo$@ $?

-

-$(TMP_DIR)\tclZlib.obj: $(GENERICDIR)\tclZlib.c

-	$(cc32) $(TCL_CFLAGS) -I$(COMPATDIR)\zlib -DBUILD_tcl -Fo$@ $?

-

-$(TMP_DIR)\tclPkgConfig.obj: $(GENERICDIR)\tclPkgConfig.c

-	$(cc32) -DBUILD_tcl $(TCL_CFLAGS) \

-	-DCFG_INSTALL_LIBDIR="\"$(LIB_INSTALL_DIR:\=\\)\"" \

-	-DCFG_INSTALL_BINDIR="\"$(BIN_INSTALL_DIR:\=\\)\"" \

-	-DCFG_INSTALL_SCRDIR="\"$(SCRIPT_INSTALL_DIR:\=\\)\"" \

-	-DCFG_INSTALL_INCDIR="\"$(INCLUDE_INSTALL_DIR:\=\\)\"" \

-	-DCFG_INSTALL_DOCDIR="\"$(DOC_INSTALL_DIR:\=\\)\""	\

-	-DCFG_RUNTIME_LIBDIR="\"$(LIB_INSTALL_DIR:\=\\)\"" \

-	-DCFG_RUNTIME_BINDIR="\"$(BIN_INSTALL_DIR:\=\\)\"" \

-	-DCFG_RUNTIME_SCRDIR="\"$(SCRIPT_INSTALL_DIR:\=\\)\"" \

-	-DCFG_RUNTIME_INCDIR="\"$(INCLUDE_INSTALL_DIR:\=\\)\"" \

-	-DCFG_RUNTIME_DOCDIR="\"$(DOC_INSTALL_DIR:\=\\)\""     \

-	-Fo$@ $?

-

-$(TMP_DIR)\tclAppInit.obj: $(WINDIR)\tclAppInit.c

-	$(cc32) $(TCL_CFLAGS) \

-	    -DTCL_USE_STATIC_PACKAGES=$(TCL_USE_STATIC_PACKAGES) \

-	    -Fo$@ $?

-

-### The following objects should be built using the stub interfaces

-### *ALL* extensions need to built with -DTCL_THREADS=1

-

-$(TMP_DIR)\tclWinReg.obj: $(WINDIR)\tclWinReg.c

-!if $(STATIC_BUILD)

-	$(cc32) $(TCL_CFLAGS) -DTCL_THREADS=1 -DSTATIC_BUILD -Fo$@ $?

-!else

-	$(cc32) $(TCL_CFLAGS) -DTCL_THREADS=1 -DUSE_TCL_STUBS -Fo$@ $?

-!endif

-

-

-$(TMP_DIR)\tclWinDde.obj: $(WINDIR)\tclWinDde.c

-!if $(STATIC_BUILD)

-	$(cc32) $(TCL_CFLAGS) -DTCL_THREADS=1 -DSTATIC_BUILD -Fo$@ $?

-!else

-	$(cc32) $(TCL_CFLAGS) -DTCL_THREADS=1 -DUSE_TCL_STUBS -Fo$@ $?

-!endif

-

-

-### The following objects are part of the stub library and should not

-### be built as DLL objects.  -Zl is used to avoid a dependency on any

-### specific C run-time.

-

-$(TMP_DIR)\tclStubLib.obj: $(GENERICDIR)\tclStubLib.c

-	$(cc32) $(STUB_CFLAGS) -Zl -DSTATIC_BUILD $(TCL_INCLUDES) -Fo$@ $?

-

-$(TMP_DIR)\tclTomMathStubLib.obj: $(GENERICDIR)\tclTomMathStubLib.c

-	$(cc32) $(STUB_CFLAGS) -Zl -DSTATIC_BUILD $(TCL_INCLUDES) -Fo$@ $?

-

-$(TMP_DIR)\tclOOStubLib.obj: $(GENERICDIR)\tclOOStubLib.c

-	$(cc32) $(STUB_CFLAGS) -Zl -DSTATIC_BUILD $(TCL_INCLUDES) -Fo$@ $?

-

-$(TMP_DIR)\tclsh.exe.manifest: $(WINDIR)\tclsh.exe.manifest.in

-	@nmakehlp -s << $** >$@

-@MACHINE@	  $(MACHINE:IX86=X86)

-@TCL_WIN_VERSION@  $(DOTVERSION).0.0

-<<

-

-#---------------------------------------------------------------------

-# Generate the source dependencies.  Having dependency rules will

-# improve incremental build accuracy without having to resort to a

-# full rebuild just because some non-global header file like

-# tclCompile.h was changed.  These rules aren't needed when building

-# from scratch.

-#---------------------------------------------------------------------

-

-depend:

-!if !exist($(TCLSH))

-	@echo Build tclsh first!

-!else

-	$(TCLSH) $(TOOLSDIR:\=/)/mkdepend.tcl -vc32 -out:"$(OUT_DIR)\depend.mk" \

-		-passthru:"-DBUILD_tcl $(TCL_INCLUDES)" $(GENERICDIR),$$(GENERICDIR) \

-		$(COMPATDIR),$$(COMPATDIR) $(TOMMATHDIR),$$(TOMMATHDIR) $(WINDIR),$$(WINDIR) @<<

-$(TCLOBJS)

-<<

-!endif

-

-#---------------------------------------------------------------------

-# Dependency rules

-#---------------------------------------------------------------------

-

-!if exist("$(OUT_DIR)\depend.mk")

-!include "$(OUT_DIR)\depend.mk"

-!message *** Dependency rules in use.

-!else

-!message *** Dependency rules are not being used.

-!endif

-

-### add a spacer in the output

-!message

-

-

-#---------------------------------------------------------------------

-# Implicit rules.  A limitation exists with nmake that requires that

-# source directory can not contain spaces in the path.  This an

-# absolute.

-#---------------------------------------------------------------------

-

-{$(WINDIR)}.c{$(TMP_DIR)}.obj::

-	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<

-$<

-<<

-

-{$(TOMMATHDIR)}.c{$(TMP_DIR)}.obj::

-	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<

-$<

-<<

-

-{$(GENERICDIR)}.c{$(TMP_DIR)}.obj::

-	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<

-$<

-<<

-

-{$(COMPATDIR)}.c{$(TMP_DIR)}.obj::

-	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<

-$<

-<<

-

-{$(COMPATDIR)\zlib}.c{$(TMP_DIR)}.obj::

-	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<

-$<

-<<

-

-{$(WINDIR)}.rc{$(TMP_DIR)}.res:

-	$(rc32) -fo $@ -r -i "$(GENERICDIR)" -i "$(TMP_DIR)" \

-	    -d DEBUG=$(DEBUG) -d UNCHECKED=$(UNCHECKED) \

-	    -d TCL_THREADS=$(TCL_THREADS) \

-	    -d STATIC_BUILD=$(STATIC_BUILD) \

-	    $<

-

-$(TMP_DIR)\tclsh.res: $(TMP_DIR)\tclsh.exe.manifest

-

-.SUFFIXES:

-.SUFFIXES:.c .rc

-

-

-#---------------------------------------------------------------------

-# Installation.

-#---------------------------------------------------------------------

-

-install-binaries:

-	@echo Installing to '$(_INSTALLDIR)'

-	@echo Installing $(TCLLIBNAME)

-!if "$(TCLLIB)" != "$(TCLIMPLIB)"

-	@$(CPY) "$(TCLLIB)" "$(BIN_INSTALL_DIR)\"

-!endif

-	@$(CPY) "$(TCLIMPLIB)" "$(LIB_INSTALL_DIR)\"

-!if exist($(TCLSH))

-	@echo Installing $(TCLSHNAME)

-	@$(CPY) "$(TCLSH)" "$(BIN_INSTALL_DIR)\"

-!endif

-	@echo Installing $(TCLSTUBLIBNAME)

-	@$(CPY) "$(TCLSTUBLIB)" "$(LIB_INSTALL_DIR)\"

-

-#" emacs fix

-

-install-libraries: tclConfig install-msgs install-tzdata

-	@if not exist "$(SCRIPT_INSTALL_DIR)$(NULL)" \

-		$(MKDIR) "$(SCRIPT_INSTALL_DIR)"

-	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8$(NULL)" \

-		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8"

-	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4$(NULL)" \

-		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4"

-	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4\platform$(NULL)" \

-		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4\platform"

-	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.5$(NULL)" \

-		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.5"

-	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.6$(NULL)" \

-		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.6"

-	@echo Installing header files

-	@$(CPY) "$(GENERICDIR)\tcl.h"             "$(INCLUDE_INSTALL_DIR)\"

-	@$(CPY) "$(GENERICDIR)\tclDecls.h"        "$(INCLUDE_INSTALL_DIR)\"

-	@$(CPY) "$(GENERICDIR)\tclOO.h"           "$(INCLUDE_INSTALL_DIR)\"

-	@$(CPY) "$(GENERICDIR)\tclOODecls.h"      "$(INCLUDE_INSTALL_DIR)\"

-	@$(CPY) "$(GENERICDIR)\tclPlatDecls.h"    "$(INCLUDE_INSTALL_DIR)\"

-	@$(CPY) "$(GENERICDIR)\tclTomMath.h"      "$(INCLUDE_INSTALL_DIR)\"

-	@$(CPY) "$(GENERICDIR)\tclTomMathDecls.h" "$(INCLUDE_INSTALL_DIR)\"

-	@$(CPY) "$(TOMMATHDIR)\tommath_class.h"   "$(INCLUDE_INSTALL_DIR)\"

-	@$(CPY) "$(TOMMATHDIR)\tommath_superclass.h" "$(INCLUDE_INSTALL_DIR)\"

-	@echo Installing library files to $(SCRIPT_INSTALL_DIR)

-	@$(CPY) "$(ROOT)\library\history.tcl"     "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\init.tcl"        "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\clock.tcl"       "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\tm.tcl"          "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\parray.tcl"      "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\safe.tcl"        "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\tclIndex"        "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\package.tcl"     "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\word.tcl"        "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(ROOT)\library\auto.tcl"        "$(SCRIPT_INSTALL_DIR)\"

-	@$(CPY) "$(OUT_DIR)\tclConfig.sh"         "$(LIB_INSTALL_DIR)\"

-	@$(CPY) "$(WINDIR)\tclooConfig.sh"        "$(LIB_INSTALL_DIR)\"

-	@echo Installing library http1.0 directory

-	@$(CPY) "$(ROOT)\library\http1.0\*.tcl" \

-	    "$(SCRIPT_INSTALL_DIR)\http1.0\"

-	@echo Installing library opt0.4 directory

-	@$(CPY) "$(ROOT)\library\opt\*.tcl" \

-	    "$(SCRIPT_INSTALL_DIR)\opt0.4\"

-	@echo Installing package http $(PKG_HTTP_VER) as a Tcl Module

-	@$(COPY) "$(ROOT)\library\http\http.tcl" \

-	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.6\http-$(PKG_HTTP_VER).tm"

-	@echo Installing package msgcat $(PKG_MSGCAT_VER) as a Tcl Module

-	@$(COPY) "$(ROOT)\library\msgcat\msgcat.tcl" \

-	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.5\msgcat-$(PKG_MSGCAT_VER).tm"

-	@echo Installing package tcltest $(PKG_TCLTEST_VER) as a Tcl Module

-	@$(COPY) "$(ROOT)\library\tcltest\tcltest.tcl" \

-	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.5\tcltest-$(PKG_TCLTEST_VER).tm"

-	@echo Installing package platform $(PKG_PLATFORM_VER) as a Tcl Module

-	@$(COPY) "$(ROOT)\library\platform\platform.tcl" \

-	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4\platform-$(PKG_PLATFORM_VER).tm"

-	@echo Installing package platform::shell $(PKG_SHELL_VER) as a Tcl Module

-	@$(COPY) "$(ROOT)\library\platform\shell.tcl" \

-	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4\platform\shell-$(PKG_SHELL_VER).tm"

-	@echo Installing $(TCLDDELIBNAME)

-!if $(STATIC_BUILD)

-!if !$(TCL_USE_STATIC_PACKAGES)

-	@$(CPY) "$(TCLDDELIB)" "$(LIB_INSTALL_DIR)\"

-!endif

-!else

-	@$(CPY) "$(TCLDDELIB)" "$(LIB_INSTALL_DIR)\dde$(DDEDOTVERSION)\"

-	@$(CPY) "$(ROOT)\library\dde\pkgIndex.tcl" \

-	    "$(LIB_INSTALL_DIR)\dde$(DDEDOTVERSION)\"

-!endif

-	@echo Installing $(TCLREGLIBNAME)

-!if $(STATIC_BUILD)

-!if !$(TCL_USE_STATIC_PACKAGES)

-	@$(CPY) "$(TCLREGLIB)" "$(LIB_INSTALL_DIR)\"

-!endif

-!else

-	@$(CPY) "$(TCLREGLIB)" "$(LIB_INSTALL_DIR)\reg$(REGDOTVERSION)\"

-	@$(CPY) "$(ROOT)\library\reg\pkgIndex.tcl" \

-	    "$(LIB_INSTALL_DIR)\reg$(REGDOTVERSION)\"

-!endif

-	@echo Installing encodings

-	@$(CPY) "$(ROOT)\library\encoding\*.enc" \

-		"$(SCRIPT_INSTALL_DIR)\encoding\"

-

-#" emacs fix

-

-install-tzdata:

-	@echo Installing time zone data

-	@set TCL_LIBRARY=$(ROOT:\=/)/library

-	@$(TCLSH_NATIVE) "$(ROOT:\=/)/tools/installData.tcl" \

-	    "$(ROOT:\=/)/library/tzdata" "$(SCRIPT_INSTALL_DIR)/tzdata"

-

-install-msgs:

-	@echo Installing message catalogs

-	@set TCL_LIBRARY=$(ROOT:\=/)/library

-	@$(TCLSH_NATIVE) "$(ROOT:\=/)/tools/installData.tcl" \

-	    "$(ROOT:\=/)/library/msgs" "$(SCRIPT_INSTALL_DIR)/msgs"

-

-#---------------------------------------------------------------------

-# Clean up

-#---------------------------------------------------------------------

-

-tidy:

-!if "$(TCLLIB)" != "$(TCLIMPLIB)"

-	@echo Removing $(TCLLIB) ...

-	@if exist $(TCLLIB) del $(TCLLIB)

-!endif

-	@echo Removing $(TCLIMPLIB) ...

-	@if exist $(TCLIMPLIB) del $(TCLIMPLIB)

-	@echo Removing $(TCLSH) ...

-	@if exist $(TCLSH) del $(TCLSH)

-	@echo Removing $(TCLTEST) ...

-	@if exist $(TCLTEST) del $(TCLTEST)

-	@echo Removing $(TCLDDELIB) ...

-	@if exist $(TCLDDELIB) del $(TCLDDELIB)

-	@echo Removing $(TCLREGLIB) ...

-	@if exist $(TCLREGLIB) del $(TCLREGLIB)

-

-clean: clean-pkgs

-	@echo Cleaning $(TMP_DIR)\* ...

-	@if exist $(TMP_DIR)\nul $(RMDIR) $(TMP_DIR)

-	@echo Cleaning $(WINDIR)\nmakehlp.obj ...

-	@if exist $(WINDIR)\nmakehlp.obj del $(WINDIR)\nmakehlp.obj

-	@echo Cleaning $(WINDIR)\nmakehlp.exe ...

-	@if exist $(WINDIR)\nmakehlp.exe del $(WINDIR)\nmakehlp.exe

-	@echo Cleaning $(WINDIR)\_junk.pch ...

-	@if exist $(WINDIR)\_junk.pch del $(WINDIR)\_junk.pch

-	@echo Cleaning $(WINDIR)\vercl.x ...

-	@if exist $(WINDIR)\vercl.x del $(WINDIR)\vercl.x

-	@echo Cleaning $(WINDIR)\vercl.i ...

-	@if exist $(WINDIR)\vercl.i del $(WINDIR)\vercl.i

-	@echo Cleaning $(WINDIR)\versions.vc ...

-	@if exist $(WINDIR)\versions.vc del $(WINDIR)\versions.vc

-

-realclean: hose

-

-hose:

-	@echo Hosing $(OUT_DIR)\* ...

-	@if exist $(OUT_DIR)\nul $(RMDIR) $(OUT_DIR)

-

-# Local Variables:

-# mode: makefile

-# End:

+#-------------------------------------------------------------
+# makefile.vc --
+#
+#	Microsoft Visual C++ makefile for use with nmake.exe v1.62+ (VC++ 5.0+)
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+#
+# Copyright (c) 1995-1996 Sun Microsystems, Inc.
+# Copyright (c) 1998-2000 Ajuba Solutions.
+# Copyright (c) 2001-2005 ActiveState Corporation.
+# Copyright (c) 2001-2004 David Gravereaux.
+# Copyright (c) 2003-2008 Pat Thoyts.
+#------------------------------------------------------------------------------
+
+# Check to see we are configured to build with MSVC (MSDEVDIR, MSVCDIR or
+# VCINSTALLDIR) or with the MS Platform SDK (MSSDK or WindowsSDKDir)
+!if !defined(MSDEVDIR) && !defined(MSVCDIR) && !defined(VCINSTALLDIR) && !defined(MSSDK) && !defined(WINDOWSSDKDIR)
+MSG = ^
+You need to run vcvars32.bat from Developer Studio or setenv.bat from the^
+Platform SDK first to setup the environment.  Jump to this line to read^
+the build instructions.
+!error $(MSG)
+!endif
+
+#------------------------------------------------------------------------------
+# HOW TO USE this makefile:
+#
+# 1)  It is now necessary to have MSVCDir, MSDevDir or MSSDK set in the
+#     environment.  This is used as a check to see if vcvars32.bat had been
+#     run prior to running nmake or during the installation of Microsoft
+#     Visual C++, MSVCDir had been set globally and the PATH adjusted.
+#     Either way is valid.
+#
+#     You'll need to run vcvars32.bat contained in the MsDev's vc(98)/bin
+#     directory to setup the proper environment, if needed, for your
+#     current setup.  This is a needed bootstrap requirement and allows the
+#     swapping of different environments to be easier.
+#
+# 2)  To use the Platform SDK (not expressly needed), run setenv.bat after
+#     vcvars32.bat according to the instructions for it.  This can also
+#     turn on the 64-bit compiler, if your SDK has it.
+#
+# 3)  Targets are:
+#	release  -- Builds the core, the shell and the dlls. (default)
+#	dlls     -- Just builds the windows extensions
+#	shell    -- Just builds the shell and the core.
+#	core     -- Only builds the core [tclXX.(dll|lib)].
+#	all      -- Builds everything.
+#	test     -- Builds and runs the test suite.
+#	tcltest  -- Just builds the test shell.
+#	install  -- Installs the built binaries and libraries to $(INSTALLDIR)
+#		    as the root of the install tree.
+#	tidy/clean/hose -- varying levels of cleaning.
+#	genstubs -- Rebuilds the Stubs table and support files (dev only).
+#	depend   -- Generates an accurate set of source dependancies for this
+#		    makefile.  Helpful to avoid problems when the sources are
+#		    refreshed and you rebuild, but can "overbuild" when common
+#		    headers like tclInt.h just get small changes.
+#	htmlhelp -- Builds a Windows .chm help file for Tcl and Tk from the
+#		    troff manual pages found in $(ROOT)\doc. You need to
+#		    have installed the HTML Help Compiler package from Microsoft
+#		    to produce the .chm file.
+#	winhelp  -- (deprecated) Builds the windows .hlp file for Tcl from
+#		    the troff man files found in $(ROOT)\doc. This type of
+#		    help file is deprecated by Microsoft in favour of html
+#		    help files (.chm)
+#
+# 4)  Macros usable on the commandline:
+#	INSTALLDIR=<path>
+#		Sets where to install Tcl from the built binaries.
+#		C:\Progra~1\Tcl is assumed when not specified.
+#
+#	OPTS=loimpact,msvcrt,nothreads,pdbs,profile,static,staticpkg,symbols,thrdalloc,tclalloc,unchecked,none
+#		Sets special options for the core.  The default is for none.
+#		Any combination of the above may be used (comma separated).
+#		'none' will over-ride everything to nothing.
+#
+#		loimpact = Adds a flag for how NT treats the heap to keep memory
+#			   in use, low.  This is said to impact alloc performance.
+#		msvcrt   = Affects the static option only to switch it from
+#			   using libcmt(d) as the C runtime [by default] to
+#			   msvcrt(d). This is useful for static embedding
+#			   support.
+#		nothreads= Turns off full multithreading support.
+#		pdbs     = Build detached symbols for release builds.
+#		profile  = Adds profiling hooks.  Map file is assumed.
+#		static   = Builds a static library of the core instead of a
+#			   dll.  The static library will contain the dde and reg
+#			   extensions. External applications who want to use
+#			   this, need to link with the stub library as well as
+#			   the static Tcl library.The shell will be static (and
+#			   large), as well.
+#		staticpkg = Affects the static option only to switch
+#			   tclshXX.exe to have the dde and reg extension linked
+#			   inside it.
+#		symbols  = Debug build. Links to the debug C runtime, disables
+#			   optimizations and creates pdb symbols files.
+#		thrdalloc = Use the thread allocator (shared global free pool)
+#			   This is the default on threaded builds.
+#		tclalloc = Use the old non-thread allocator
+#		unchecked= Allows a symbols build to not use the debug
+#			   enabled runtime (msvcrt.dll not msvcrtd.dll
+#			   or libcmt.lib not libcmtd.lib).
+#
+#	STATS=compdbg,memdbg,none
+#		Sets optional memory and bytecode compiler debugging code added
+#		to the core.  The default is for none.  Any combination of the
+#		above may be used (comma separated).  'none' will over-ride
+#		everything to nothing.
+#
+#		compdbg  = Enables byte compilation logging.
+#		memdbg   = Enables the debugging memory allocator.
+#
+#	CHECKS=64bit,fullwarn,nodep,none
+#		Sets special macros for checking compatibility.
+#
+#		64bit    = Enable 64bit portability warnings (if available)
+#		fullwarn = Builds with full compiler and link warnings enabled.
+#			    Very verbose.
+#		nodep	 = Turns off compatibility macros to ensure the core
+#			    isn't being built with deprecated functions.
+#
+#	MACHINE=(ALPHA|AMD64|IA64|IX86)
+#		Set the machine type used for the compiler, linker, and
+#		resource compiler.  This hook is needed to tell the tools
+#		when alternate platforms are requested.  IX86 is the default
+#		when not specified. If the CPU environment variable has been
+#		set (ie: recent Platform SDK) then MACHINE is set from CPU.
+#
+#	TMP_DIR=<path>
+#	OUT_DIR=<path>
+#		Hooks to allow the intermediate and output directories to be
+#		changed.  $(OUT_DIR) is assumed to be
+#		$(BINROOT)\(Release|Debug) based on if symbols are requested.
+#		$(TMP_DIR) will de $(OUT_DIR)\<buildtype> by default.
+#
+#	TESTPAT=<file>
+#		Reads the tests requested to be run from this file.
+#
+#	CFG_ENCODING=encoding
+#		name of encoding for configuration information. Defaults
+#		to cp1252
+#
+# 5)  Examples:
+#
+#	Basic syntax of calling nmake looks like this:
+#	nmake [-nologo] -f makefile.vc [target|macrodef [target|macrodef] [...]]
+#
+#                        Standard (no frills)
+#       c:\tcl_src\win\>c:\progra~1\micros~1\vc98\bin\vcvars32.bat
+#       Setting environment for using Microsoft Visual C++ tools.
+#       c:\tcl_src\win\>nmake -f makefile.vc release
+#       c:\tcl_src\win\>nmake -f makefile.vc install INSTALLDIR=c:\progra~1\tcl
+#
+#                         Building for Win64
+#       c:\tcl_src\win\>c:\progra~1\micros~1\vc98\bin\vcvars32.bat
+#       Setting environment for using Microsoft Visual C++ tools.
+#       c:\tcl_src\win\>c:\progra~1\platfo~1\setenv.bat /pre64 /RETAIL
+#       Targeting Windows pre64 RETAIL
+#       c:\tcl_src\win\>nmake -f makefile.vc MACHINE=IA64
+#
+#------------------------------------------------------------------------------
+#==============================================================================
+###############################################################################
+
+
+#    //==================================================================\\
+#   >>[               -> Do not modify below this line. <-               ]<<
+#   >>[  Please, use the commandline macros to modify how Tcl is built.  ]<<
+#   >>[  If you need more features, send us a patch for more macros.     ]<<
+#    \\==================================================================//
+
+
+###############################################################################
+#==============================================================================
+#------------------------------------------------------------------------------
+
+!if !exist("makefile.vc")
+MSG = ^
+You must run this makefile only from the directory it is in.^
+Please `cd` to its location first.
+!error $(MSG)
+!endif
+
+PROJECT = tcl
+!include "rules.vc"
+
+STUBPREFIX      = $(PROJECT)stub
+DOTVERSION      = $(TCL_MAJOR_VERSION).$(TCL_MINOR_VERSION)
+VERSION         = $(TCL_MAJOR_VERSION)$(TCL_MINOR_VERSION)
+
+DDEDOTVERSION = 1.4
+DDEVERSION = $(DDEDOTVERSION:.=)
+
+REGDOTVERSION = 1.3
+REGVERSION = $(REGDOTVERSION:.=)
+
+BINROOT		= $(MAKEDIR)     # originally .
+ROOT		= $(MAKEDIR)\..  # originally ..
+
+TCLIMPLIB	= $(OUT_DIR)\$(PROJECT)$(VERSION)$(SUFX).lib
+TCLLIBNAME	= $(PROJECT)$(VERSION)$(SUFX).$(EXT)
+TCLLIB		= $(OUT_DIR)\$(TCLLIBNAME)
+
+TCLSTUBLIBNAME	= $(STUBPREFIX)$(VERSION).lib
+TCLSTUBLIB	= $(OUT_DIR)\$(TCLSTUBLIBNAME)
+
+TCLSHNAME	= $(PROJECT)sh$(VERSION)$(SUFX).exe
+TCLSH		= $(OUT_DIR)\$(TCLSHNAME)
+
+TCLREGLIBNAME	= $(PROJECT)reg$(REGVERSION)$(SUFX:t=).$(EXT)
+TCLREGLIB	= $(OUT_DIR)\$(TCLREGLIBNAME)
+
+TCLDDELIBNAME	= $(PROJECT)dde$(DDEVERSION)$(SUFX:t=).$(EXT)
+TCLDDELIB	= $(OUT_DIR)\$(TCLDDELIBNAME)
+
+TCLTEST		= $(OUT_DIR)\$(PROJECT)test.exe
+CAT32		= $(OUT_DIR)\cat32.exe
+
+# Can we run what we build? IX86 runs on all architectures.
+!ifndef TCLSH_NATIVE
+!if "$(MACHINE)" == "IX86" || "$(MACHINE)" == "$(NATIVE_ARCH)"
+TCLSH_NATIVE	= $(TCLSH)
+!else
+!error You must explicitly set TCLSH_NATIVE for cross-compilation
+!endif
+!endif
+
+### Make sure we use backslash only.
+LIB_INSTALL_DIR		= $(_INSTALLDIR)\lib
+BIN_INSTALL_DIR		= $(_INSTALLDIR)\bin
+DOC_INSTALL_DIR		= $(_INSTALLDIR)\doc
+SCRIPT_INSTALL_DIR	= $(_INSTALLDIR)\lib\tcl$(DOTVERSION)
+INCLUDE_INSTALL_DIR	= $(_INSTALLDIR)\include
+
+TCLSHOBJS = \
+	$(TMP_DIR)\tclAppInit.obj \
+!if !$(STATIC_BUILD)
+!if $(TCL_USE_STATIC_PACKAGES)
+	$(TMP_DIR)\tclWinReg.obj \
+	$(TMP_DIR)\tclWinDde.obj \
+!endif
+!endif
+	$(TMP_DIR)\tclsh.res
+
+TCLTESTOBJS = \
+	$(TMP_DIR)\tclTest.obj \
+	$(TMP_DIR)\tclTestObj.obj \
+	$(TMP_DIR)\tclTestProcBodyObj.obj \
+	$(TMP_DIR)\tclThreadTest.obj \
+	$(TMP_DIR)\tclWinTest.obj \
+!if !$(STATIC_BUILD)
+!if $(TCL_USE_STATIC_PACKAGES)
+	$(TMP_DIR)\tclWinReg.obj \
+	$(TMP_DIR)\tclWinDde.obj \
+!endif
+!endif
+	$(TMP_DIR)\testMain.obj
+
+COREOBJS = \
+	$(TMP_DIR)\regcomp.obj \
+	$(TMP_DIR)\regerror.obj \
+	$(TMP_DIR)\regexec.obj \
+	$(TMP_DIR)\regfree.obj \
+	$(TMP_DIR)\tclAlloc.obj \
+	$(TMP_DIR)\tclAssembly.obj \
+	$(TMP_DIR)\tclAsync.obj \
+	$(TMP_DIR)\tclBasic.obj \
+	$(TMP_DIR)\tclBinary.obj \
+	$(TMP_DIR)\tclCkalloc.obj \
+	$(TMP_DIR)\tclClock.obj \
+	$(TMP_DIR)\tclClockFmt.obj \
+	$(TMP_DIR)\tclCmdAH.obj \
+	$(TMP_DIR)\tclCmdIL.obj \
+	$(TMP_DIR)\tclCmdMZ.obj \
+	$(TMP_DIR)\tclCompCmds.obj \
+	$(TMP_DIR)\tclCompCmdsGR.obj \
+	$(TMP_DIR)\tclCompCmdsSZ.obj \
+	$(TMP_DIR)\tclCompExpr.obj \
+	$(TMP_DIR)\tclCompile.obj \
+	$(TMP_DIR)\tclConfig.obj \
+	$(TMP_DIR)\tclDate.obj \
+	$(TMP_DIR)\tclDictObj.obj \
+	$(TMP_DIR)\tclDisassemble.obj \
+	$(TMP_DIR)\tclEncoding.obj \
+	$(TMP_DIR)\tclEnsemble.obj \
+	$(TMP_DIR)\tclEnv.obj \
+	$(TMP_DIR)\tclEvent.obj \
+	$(TMP_DIR)\tclExecute.obj \
+	$(TMP_DIR)\tclFCmd.obj \
+	$(TMP_DIR)\tclFileName.obj \
+	$(TMP_DIR)\tclGet.obj \
+	$(TMP_DIR)\tclHash.obj \
+	$(TMP_DIR)\tclHistory.obj \
+	$(TMP_DIR)\tclIndexObj.obj \
+	$(TMP_DIR)\tclInterp.obj \
+	$(TMP_DIR)\tclIO.obj \
+	$(TMP_DIR)\tclIOCmd.obj \
+	$(TMP_DIR)\tclIOGT.obj \
+	$(TMP_DIR)\tclIOSock.obj \
+	$(TMP_DIR)\tclIOUtil.obj \
+	$(TMP_DIR)\tclIORChan.obj \
+	$(TMP_DIR)\tclIORTrans.obj \
+	$(TMP_DIR)\tclLink.obj \
+	$(TMP_DIR)\tclListObj.obj \
+	$(TMP_DIR)\tclLiteral.obj \
+	$(TMP_DIR)\tclLoad.obj \
+	$(TMP_DIR)\tclMain.obj \
+	$(TMP_DIR)\tclMain2.obj \
+	$(TMP_DIR)\tclNamesp.obj \
+	$(TMP_DIR)\tclNotify.obj \
+	$(TMP_DIR)\tclOO.obj \
+	$(TMP_DIR)\tclOOBasic.obj \
+	$(TMP_DIR)\tclOOCall.obj \
+	$(TMP_DIR)\tclOODefineCmds.obj \
+	$(TMP_DIR)\tclOOInfo.obj \
+	$(TMP_DIR)\tclOOMethod.obj \
+	$(TMP_DIR)\tclOOStubInit.obj \
+	$(TMP_DIR)\tclObj.obj \
+	$(TMP_DIR)\tclOptimize.obj \
+	$(TMP_DIR)\tclPanic.obj \
+	$(TMP_DIR)\tclParse.obj \
+	$(TMP_DIR)\tclPathObj.obj \
+	$(TMP_DIR)\tclPipe.obj \
+	$(TMP_DIR)\tclPkg.obj \
+	$(TMP_DIR)\tclPkgConfig.obj \
+	$(TMP_DIR)\tclPosixStr.obj \
+	$(TMP_DIR)\tclPreserve.obj \
+	$(TMP_DIR)\tclProc.obj \
+	$(TMP_DIR)\tclRegexp.obj \
+	$(TMP_DIR)\tclResolve.obj \
+	$(TMP_DIR)\tclResult.obj \
+	$(TMP_DIR)\tclScan.obj \
+	$(TMP_DIR)\tclStringObj.obj \
+	$(TMP_DIR)\tclStrIdxTree.obj \
+	$(TMP_DIR)\tclStrToD.obj \
+	$(TMP_DIR)\tclStubInit.obj \
+	$(TMP_DIR)\tclThread.obj \
+	$(TMP_DIR)\tclThreadAlloc.obj \
+	$(TMP_DIR)\tclThreadJoin.obj \
+	$(TMP_DIR)\tclThreadStorage.obj \
+	$(TMP_DIR)\tclTimer.obj \
+	$(TMP_DIR)\tclTomMathInterface.obj \
+	$(TMP_DIR)\tclTrace.obj \
+	$(TMP_DIR)\tclUtf.obj \
+	$(TMP_DIR)\tclUtil.obj \
+	$(TMP_DIR)\tclVar.obj \
+	$(TMP_DIR)\tclZlib.obj
+
+ZLIBOBJS = \
+	$(TMP_DIR)\adler32.obj \
+	$(TMP_DIR)\compress.obj \
+	$(TMP_DIR)\crc32.obj \
+	$(TMP_DIR)\deflate.obj \
+	$(TMP_DIR)\infback.obj \
+	$(TMP_DIR)\inffast.obj \
+	$(TMP_DIR)\inflate.obj \
+	$(TMP_DIR)\inftrees.obj \
+	$(TMP_DIR)\trees.obj \
+	$(TMP_DIR)\uncompr.obj \
+	$(TMP_DIR)\zutil.obj
+
+TOMMATHOBJS = \
+	$(TMP_DIR)\bncore.obj \
+	$(TMP_DIR)\bn_reverse.obj \
+	$(TMP_DIR)\bn_fast_s_mp_mul_digs.obj \
+	$(TMP_DIR)\bn_fast_s_mp_sqr.obj \
+	$(TMP_DIR)\bn_mp_add.obj \
+	$(TMP_DIR)\bn_mp_add_d.obj \
+	$(TMP_DIR)\bn_mp_and.obj \
+	$(TMP_DIR)\bn_mp_clamp.obj \
+	$(TMP_DIR)\bn_mp_clear.obj \
+	$(TMP_DIR)\bn_mp_clear_multi.obj \
+	$(TMP_DIR)\bn_mp_cmp.obj \
+	$(TMP_DIR)\bn_mp_cmp_d.obj \
+	$(TMP_DIR)\bn_mp_cmp_mag.obj \
+	$(TMP_DIR)\bn_mp_cnt_lsb.obj \
+	$(TMP_DIR)\bn_mp_copy.obj \
+	$(TMP_DIR)\bn_mp_count_bits.obj \
+	$(TMP_DIR)\bn_mp_div.obj \
+	$(TMP_DIR)\bn_mp_div_d.obj \
+	$(TMP_DIR)\bn_mp_div_2.obj \
+	$(TMP_DIR)\bn_mp_div_2d.obj \
+	$(TMP_DIR)\bn_mp_div_3.obj \
+	$(TMP_DIR)\bn_mp_exch.obj \
+	$(TMP_DIR)\bn_mp_expt_d.obj \
+	$(TMP_DIR)\bn_mp_grow.obj \
+	$(TMP_DIR)\bn_mp_init.obj \
+	$(TMP_DIR)\bn_mp_init_copy.obj \
+	$(TMP_DIR)\bn_mp_init_multi.obj \
+	$(TMP_DIR)\bn_mp_init_set.obj \
+	$(TMP_DIR)\bn_mp_init_set_int.obj \
+	$(TMP_DIR)\bn_mp_init_size.obj \
+	$(TMP_DIR)\bn_mp_karatsuba_mul.obj \
+	$(TMP_DIR)\bn_mp_karatsuba_sqr.obj \
+	$(TMP_DIR)\bn_mp_lshd.obj \
+	$(TMP_DIR)\bn_mp_mod.obj \
+	$(TMP_DIR)\bn_mp_mod_2d.obj \
+	$(TMP_DIR)\bn_mp_mul.obj \
+	$(TMP_DIR)\bn_mp_mul_2.obj \
+	$(TMP_DIR)\bn_mp_mul_2d.obj \
+	$(TMP_DIR)\bn_mp_mul_d.obj \
+	$(TMP_DIR)\bn_mp_neg.obj \
+	$(TMP_DIR)\bn_mp_or.obj \
+	$(TMP_DIR)\bn_mp_radix_size.obj \
+	$(TMP_DIR)\bn_mp_radix_smap.obj \
+	$(TMP_DIR)\bn_mp_read_radix.obj \
+	$(TMP_DIR)\bn_mp_rshd.obj \
+	$(TMP_DIR)\bn_mp_set.obj \
+	$(TMP_DIR)\bn_mp_set_int.obj \
+	$(TMP_DIR)\bn_mp_shrink.obj \
+	$(TMP_DIR)\bn_mp_sqr.obj \
+	$(TMP_DIR)\bn_mp_sqrt.obj \
+	$(TMP_DIR)\bn_mp_sub.obj \
+	$(TMP_DIR)\bn_mp_sub_d.obj \
+	$(TMP_DIR)\bn_mp_to_unsigned_bin.obj \
+	$(TMP_DIR)\bn_mp_to_unsigned_bin_n.obj \
+	$(TMP_DIR)\bn_mp_toom_mul.obj \
+	$(TMP_DIR)\bn_mp_toom_sqr.obj \
+	$(TMP_DIR)\bn_mp_toradix_n.obj \
+	$(TMP_DIR)\bn_mp_unsigned_bin_size.obj \
+	$(TMP_DIR)\bn_mp_xor.obj \
+	$(TMP_DIR)\bn_mp_zero.obj \
+	$(TMP_DIR)\bn_s_mp_add.obj \
+	$(TMP_DIR)\bn_s_mp_mul_digs.obj \
+	$(TMP_DIR)\bn_s_mp_sqr.obj \
+	$(TMP_DIR)\bn_s_mp_sub.obj
+
+PLATFORMOBJS = \
+	$(TMP_DIR)\tclWin32Dll.obj \
+	$(TMP_DIR)\tclWinChan.obj \
+	$(TMP_DIR)\tclWinConsole.obj \
+	$(TMP_DIR)\tclWinError.obj \
+	$(TMP_DIR)\tclWinFCmd.obj \
+	$(TMP_DIR)\tclWinFile.obj \
+	$(TMP_DIR)\tclWinInit.obj \
+	$(TMP_DIR)\tclWinLoad.obj \
+	$(TMP_DIR)\tclWinNotify.obj \
+	$(TMP_DIR)\tclWinPipe.obj \
+	$(TMP_DIR)\tclWinSerial.obj \
+	$(TMP_DIR)\tclWinSock.obj \
+	$(TMP_DIR)\tclWinThrd.obj \
+	$(TMP_DIR)\tclWinTime.obj \
+!if $(STATIC_BUILD)
+	$(TMP_DIR)\tclWinReg.obj \
+	$(TMP_DIR)\tclWinDde.obj \
+!else
+	$(TMP_DIR)\tcl.res
+!endif
+
+TCLOBJS = $(COREOBJS) $(ZLIBOBJS) $(TOMMATHOBJS) $(PLATFORMOBJS)
+
+TCLSTUBOBJS = \
+	$(TMP_DIR)\tclStubLib.obj \
+	$(TMP_DIR)\tclTomMathStubLib.obj \
+	$(TMP_DIR)\tclOOStubLib.obj
+
+### The following paths CANNOT have spaces in them.
+COMPATDIR	= $(ROOT)\compat
+DOCDIR		= $(ROOT)\doc
+GENERICDIR	= $(ROOT)\generic
+TOMMATHDIR	= $(ROOT)\libtommath
+TOOLSDIR	= $(ROOT)\tools
+WINDIR		= $(ROOT)\win
+PKGSDIR		= $(ROOT)\pkgs
+
+#---------------------------------------------------------------------
+# Compile flags
+#---------------------------------------------------------------------
+
+!if !$(DEBUG)
+!if $(OPTIMIZING)
+### This cranks the optimization level to maximize speed
+cdebug	= -O2 $(OPTIMIZATIONS)
+!else
+cdebug	=
+!endif
+!if $(SYMBOLS)
+cdebug	= $(cdebug) -Zi
+!endif
+!else if "$(MACHINE)" == "IA64" || "$(MACHINE)" == "AMD64"
+### Warnings are too many, can't support warnings into errors.
+cdebug	= -Zi -Od $(DEBUGFLAGS)
+!else
+cdebug	= -Zi -WX $(DEBUGFLAGS)
+!endif
+
+### Declarations common to all compiler options
+cwarn = $(WARNINGS) -D _CRT_SECURE_NO_DEPRECATE -D _CRT_NONSTDC_NO_DEPRECATE
+cflags = -nologo -c $(COMPILERFLAGS) $(cwarn) -Fp$(TMP_DIR)^\
+
+!if $(MSVCRT)
+!if $(DEBUG) && !$(UNCHECKED)
+crt = -MDd
+!else
+crt = -MD
+!endif
+!else
+!if $(DEBUG) && !$(UNCHECKED)
+crt = -MTd
+!else
+crt = -MT
+!endif
+!endif
+
+TCL_INCLUDES	= -I"$(WINDIR)" -I"$(GENERICDIR)" -I"$(TOMMATHDIR)"
+TCL_DEFINES	= -DTCL_TOMMATH -DMP_PREC=4 -Dinline=__inline -DHAVE_ZLIB=1
+BASE_CFLAGS	= $(cflags) $(cdebug) $(crt) $(TCL_INCLUDES) $(TCL_DEFINES)
+CON_CFLAGS	= $(cflags) $(cdebug) $(crt) -DCONSOLE
+TCL_CFLAGS	= $(BASE_CFLAGS) $(OPTDEFINES)
+STUB_CFLAGS     = $(cflags) $(cdebug) $(OPTDEFINES)
+
+
+#---------------------------------------------------------------------
+# Link flags
+#---------------------------------------------------------------------
+
+!if $(DEBUG)
+ldebug	= -debug -debugtype:cv
+!else
+ldebug	= -release -opt:ref -opt:icf,3
+!if $(SYMBOLS)
+ldebug	= $(ldebug) -debug -debugtype:cv
+!endif
+!endif
+
+### Declarations common to all linker options
+lflags	= -nologo -machine:$(MACHINE) $(LINKERFLAGS) $(ldebug)
+
+!if $(PROFILE)
+lflags	= $(lflags) -profile
+!endif
+
+!if $(MSVCRT) && !($(DEBUG) && !$(UNCHECKED)) && $(VCVERSION) >= 1900
+lflags	= $(lflags) -nodefaultlib:libucrt.lib
+!endif
+
+!if $(ALIGN98_HACK) && !$(STATIC_BUILD)
+### Align sections for PE size savings.
+lflags	= $(lflags) -opt:nowin98
+!else if !$(ALIGN98_HACK) && $(STATIC_BUILD)
+### Align sections for speed in loading by choosing the virtual page size.
+lflags	= $(lflags) -align:4096
+!endif
+
+!if $(LOIMPACT)
+lflags	= $(lflags) -ws:aggressive
+!endif
+
+dlllflags = $(lflags) -dll
+conlflags = $(lflags) -subsystem:console
+guilflags = $(lflags) -subsystem:windows
+
+baselibs   = netapi32.lib kernel32.lib user32.lib advapi32.lib userenv.lib ws2_32.lib
+# Avoid 'unresolved external symbol __security_cookie' errors.
+# c.f. http://support.microsoft.com/?id=894573
+!if "$(MACHINE)" == "IA64" || "$(MACHINE)" == "AMD64"
+!if $(VCVERSION) > 1399 && $(VCVERSION) < 1500
+baselibs   = $(baselibs) bufferoverflowU.lib
+!endif
+!endif
+!if $(MSVCRT) && !($(DEBUG) && !$(UNCHECKED)) && $(VCVERSION) >= 1900
+baselibs   = $(baselibs) ucrt.lib
+!endif
+
+#---------------------------------------------------------------------
+# TclTest flags
+#---------------------------------------------------------------------
+
+!if "$(TESTPAT)" != ""
+TESTFLAGS = $(TESTFLAGS) -file $(TESTPAT)
+!endif
+
+
+#---------------------------------------------------------------------
+# Project specific targets
+#---------------------------------------------------------------------
+
+release:    setup $(TCLSH) $(TCLSTUBLIB) dlls pkgs
+core:	    setup $(TCLLIB) $(TCLSTUBLIB)
+shell:	    setup $(TCLSH)
+dlls:	    setup $(TCLREGLIB) $(TCLDDELIB)
+all:	    setup $(TCLSH) $(TCLSTUBLIB) dlls $(CAT32) pkgs
+tcltest:    setup $(TCLTEST) dlls $(CAT32)
+install:    install-binaries install-libraries install-docs install-pkgs
+
+test: test-core test-pkgs
+test-core: setup $(TCLTEST) dlls $(CAT32)
+	set TCL_LIBRARY=$(ROOT:\=/)/library
+!if "$(OS)" == "Windows_NT"  || "$(MSVCDIR)" == "IDE"
+	$(DEBUGGER) $(TCLTEST) "$(ROOT:\=/)/tests/all.tcl" $(TESTFLAGS) -loadfile <<
+		package ifneeded dde 1.4.0 [list load "$(TCLDDELIB:\=/)" dde]
+		package ifneeded registry 1.3.2 [list load "$(TCLREGLIB:\=/)" registry]
+<<
+!else
+	@echo Please wait while the tests are collected...
+	$(TCLTEST) "$(ROOT:\=/)/tests/all.tcl" $(TESTFLAGS) -loadfile << > tests.log
+		package ifneeded dde 1.4.0 "$(TCLDDELIB:\=/)" dde]
+		package ifneeded registry 1.3.2 "$(TCLREGLIB:\=/)" registry]
+<<
+	type tests.log | more
+!endif
+
+runtest: setup $(TCLTEST) dlls $(CAT32)
+	set TCL_LIBRARY=$(ROOT:\=/)/library
+	$(DEBUGGER) $(TCLTEST) $(SCRIPT)
+
+runshell: setup $(TCLSH) dlls
+	set TCL_LIBRARY=$(ROOT:\=/)/library
+	$(DEBUGGER) $(TCLSH) $(SCRIPT)
+
+setup:
+	@if not exist $(OUT_DIR)\nul mkdir $(OUT_DIR)
+	@if not exist $(TMP_DIR)\nul mkdir $(TMP_DIR)
+
+!if !$(STATIC_BUILD)
+$(TCLIMPLIB): $(TCLLIB)
+!endif
+
+$(TCLLIB): $(TCLOBJS)
+!if $(STATIC_BUILD)
+	$(lib32) -nologo $(LINKERFLAGS) -out:$@ @<<
+$**
+<<
+!else
+	$(link32) $(dlllflags) -base:@$(WINDIR)\coffbase.txt,tcl -out:$@ \
+		$(baselibs) @<<
+$**
+<<
+	$(_VC_MANIFEST_EMBED_DLL)
+!endif
+
+$(TCLSTUBLIB): $(TCLSTUBOBJS)
+	$(lib32) -nologo $(LINKERFLAGS) -nodefaultlib -out:$@ $(TCLSTUBOBJS)
+
+$(TCLSH): $(TCLSHOBJS) $(TCLSTUBLIB) $(TCLIMPLIB)
+	$(link32) $(conlflags) -stack:2300000 -out:$@ $(baselibs) $**
+	$(_VC_MANIFEST_EMBED_EXE)
+
+$(TCLTEST): $(TCLTESTOBJS) $(TCLSTUBLIB) $(TCLIMPLIB)
+	$(link32) $(conlflags) -stack:2300000 -out:$@ $(baselibs) $**
+	$(_VC_MANIFEST_EMBED_EXE)
+
+!if $(STATIC_BUILD)
+$(TCLDDELIB): $(TMP_DIR)\tclWinDde.obj
+	$(lib32) -nologo $(LINKERFLAGS) -out:$@ $**
+!else
+$(TCLDDELIB): $(TMP_DIR)\tclWinDde.obj $(TCLSTUBLIB)
+	$(link32) $(dlllflags) -base:@$(WINDIR)\coffbase.txt,tcldde -out:$@ \
+		$** $(baselibs)
+	$(_VC_MANIFEST_EMBED_DLL)
+!endif
+
+!if $(STATIC_BUILD)
+$(TCLREGLIB): $(TMP_DIR)\tclWinReg.obj
+	$(lib32) -nologo $(LINKERFLAGS) -out:$@ $**
+!else
+$(TCLREGLIB): $(TMP_DIR)\tclWinReg.obj $(TCLSTUBLIB)
+	$(link32) $(dlllflags) -base:@$(WINDIR)\coffbase.txt,tclreg -out:$@ \
+		$** $(baselibs)
+	$(_VC_MANIFEST_EMBED_DLL)
+!endif
+
+pkgs:
+	@for /d %d in ($(PKGSDIR)\*) do \
+	  @if exist "%~fd\win\makefile.vc" ( \
+	    pushd "%~fd\win" & \
+	    $(MAKE) -$(MAKEFLAGS) -f makefile.vc TCLDIR=$(ROOT) &\
+	    popd \
+	  )
+
+test-pkgs:
+	@for /d %d in ($(PKGSDIR)\*) do \
+	  @if exist "%~fd\win\makefile.vc" ( \
+	    pushd "%~fd\win" & \
+	    $(MAKE) -$(MAKEFLAGS) -f makefile.vc TCLDIR=$(ROOT) test &\
+	    popd \
+	  )
+
+install-pkgs:
+	@for /d %d in ($(PKGSDIR)\*) do \
+	  @if exist "%~fd\win\makefile.vc" ( \
+	    pushd "%~fd\win" & \
+	    $(MAKE) -$(MAKEFLAGS) -f makefile.vc TCLDIR=$(ROOT) install &\
+	    popd \
+	  )
+
+clean-pkgs:
+	@for /d %d in ($(PKGSDIR)\*) do \
+	  @if exist "%~fd\win\makefile.vc" ( \
+	    pushd "%~fd\win" & \
+	    $(MAKE) -$(MAKEFLAGS) -f makefile.vc TCLDIR=$(ROOT) clean &\
+	    popd \
+	  )
+
+$(CAT32): $(WINDIR)\cat.c
+	$(cc32) $(CON_CFLAGS) -Fo$(TMP_DIR)\ $?
+	$(link32) $(conlflags) -out:$@ -stack:16384 $(TMP_DIR)\cat.obj \
+		$(baselibs)
+	$(_VC_MANIFEST_EMBED_EXE)
+
+#---------------------------------------------------------------------
+# Regenerate the stubs files.  [Development use only]
+#---------------------------------------------------------------------
+
+genstubs:
+!if !exist($(TCLSH))
+	@echo Build tclsh first!
+!else
+	$(TCLSH) $(TOOLSDIR:\=/)/genStubs.tcl $(GENERICDIR:\=/) \
+		$(GENERICDIR:\=/)/tcl.decls $(GENERICDIR:\=/)/tclInt.decls \
+		$(GENERICDIR:\=/)/tclTomMath.decls
+	$(TCLSH) $(TOOLSDIR:\=/)/genStubs.tcl $(GENERICDIR:\=/) \
+		$(GENERICDIR:\=/)/tclOO.decls
+!endif
+
+
+#----------------------------------------------------------------------
+# The following target generates the file generic/tclTomMath.h.
+# It needs to be run (and the results checked) after updating
+# to a new release of libtommath.
+#----------------------------------------------------------------------
+
+gentommath_h:
+!if !exist($(TCLSH))
+	@echo Build tclsh first!
+!else
+	$(TCLSH) "$(TOOLSDIR:\=/)/fix_tommath_h.tcl" \
+		"$(TOMMATHDIR:\=/)/tommath.h" \
+		> "$(GENERICDIR)\tclTomMath.h"
+!endif
+
+#---------------------------------------------------------------------
+# Build the Windows HTML help file.
+#---------------------------------------------------------------------
+
+# NOTE: you can define HHC on the command-line to override this
+!ifndef HHC
+HHC=""%ProgramFiles%\HTML Help Workshop\hhc.exe""
+!endif
+HTMLDIR=$(OUT_DIR)\html
+HTMLBASE=TclTk$(VERSION)
+HHPFILE=$(HTMLDIR)\$(HTMLBASE).hhp
+CHMFILE=$(HTMLDIR)\$(HTMLBASE).chm
+
+htmlhelp: chmsetup $(CHMFILE)
+
+$(CHMFILE): $(DOCDIR)\*
+	@$(TCLSH) $(TOOLSDIR)\tcltk-man2html.tcl "--htmldir=$(HTMLDIR)"
+	@echo Compiling HTML help project
+	-$(HHC) <<$(HHPFILE) >NUL
+[OPTIONS]
+Compatibility=1.1 or later
+Compiled file=$(HTMLBASE).chm
+Default topic=contents.htm
+Display compile progress=no
+Error log file=$(HTMLBASE).log
+Full-text search=Yes
+Language=0x409 English (United States)
+Title=Tcl/Tk $(DOT_VERSION) Help
+[FILES]
+contents.htm
+docs.css
+Keywords\*.htm
+TclCmd\*.htm
+TclLib\*.htm
+TkCmd\*.htm
+TkLib\*.htm
+UserCmd\*.htm
+<<
+
+chmsetup:
+	@if not exist $(HTMLDIR)\nul mkdir $(HTMLDIR)
+
+#-------------------------------------------------------------------------
+# Build the old-style Windows .hlp file
+#-------------------------------------------------------------------------
+
+TCLHLPBASE	= $(PROJECT)$(VERSION)
+HELPFILE	= $(OUT_DIR)\$(TCLHLPBASE).hlp
+HELPCNT		= $(OUT_DIR)\$(TCLHLPBASE).cnt
+DOCTMP_DIR	= $(OUT_DIR)\$(PROJECT)_docs
+HELPRTF		= $(DOCTMP_DIR)\$(PROJECT).rtf
+MAN2HELP	= $(DOCTMP_DIR)\man2help.tcl
+MAN2HELP2	= $(DOCTMP_DIR)\man2help2.tcl
+INDEX		= $(DOCTMP_DIR)\index.tcl
+BMP		= $(DOCTMP_DIR)\feather.bmp
+BMP_NOPATH	= feather.bmp
+MAN2TCL		= $(DOCTMP_DIR)\man2tcl.exe
+
+winhelp: docsetup $(HELPFILE)
+
+docsetup:
+	@if not exist $(DOCTMP_DIR)\nul mkdir $(DOCTMP_DIR)
+
+$(MAN2HELP) $(MAN2HELP2) $(INDEX) $(BMP): $(TOOLSDIR)\$$(@F)
+	@$(CPY) $(TOOLSDIR)\$(@F) $(@D)
+
+$(HELPFILE): $(HELPRTF) $(BMP)
+	cd $(DOCTMP_DIR)
+	start /wait hcrtf.exe -x <<$(PROJECT).hpj
+[OPTIONS]
+COMPRESS=12 Hall Zeck
+LCID=0x409 0x0 0x0 ; English (United States)
+TITLE=Tcl/Tk Reference Manual
+BMROOT=.
+CNT=$(@B).cnt
+HLP=$(@B).hlp
+
+[FILES]
+$(PROJECT).rtf
+
+[WINDOWS]
+main="Tcl/Tk Reference Manual",,27648,(r15263976),(r65535)
+
+[CONFIG]
+BrowseButtons()
+CreateButton(1, "Web", ExecFile("http://www.tcl.tk"))
+CreateButton(2, "SF", ExecFile("http://sf.net/projects/tcl"))
+CreateButton(3, "Wiki", ExecFile("http://wiki.tcl.tk"))
+CreateButton(4, "FAQ", ExecFile("http://www.purl.org/NET/Tcl-FAQ/"))
+<<
+	cd $(MAKEDIR)
+	@$(CPY) "$(DOCTMP_DIR)\$(@B).hlp" "$(OUT_DIR)"
+	@$(CPY) "$(DOCTMP_DIR)\$(@B).cnt" "$(OUT_DIR)"
+
+$(MAN2TCL): $(TOOLSDIR)\$$(@B).c
+	$(cc32) $(TCL_CFLAGS) -Fo$(@D)\ $(TOOLSDIR)\$(@B).c
+	$(link32) $(conlflags) -out:$@ -stack:16384 $(@D)\man2tcl.obj
+	$(_VC_MANIFEST_EMBED_EXE)
+
+$(HELPRTF): $(MAN2TCL) $(MAN2HELP) $(MAN2HELP2) $(INDEX) $(DOCDIR)\*
+	$(TCLSH) $(MAN2HELP) -bitmap $(BMP_NOPATH) $(PROJECT) $(VERSION) $(DOCDIR:\=/)
+
+install-docs:
+!if exist("$(CHMFILE)")
+	@echo Installing compiled HTML help
+	@$(CPY) "$(CHMFILE)" "$(DOC_INSTALL_DIR)\"
+!endif
+!if exist("$(HELPFILE)")
+	@echo Installing Windows help
+	@$(CPY) "$(HELPFILE)" "$(DOC_INSTALL_DIR)\"
+	@$(CPY) "$(HELPCNT)" "$(DOC_INSTALL_DIR)\"
+!endif
+
+#---------------------------------------------------------------------
+# Build tclConfig.sh for the TEA build system.
+#---------------------------------------------------------------------
+
+tclConfig: $(OUT_DIR)\tclConfig.sh
+
+$(OUT_DIR)\tclConfig.sh: $(WINDIR)\tclConfig.sh.in
+	@echo Creating tclConfig.sh
+        @nmakehlp -s << $** >$@
+@TCL_DLL_FILE@       $(TCLLIBNAME)
+@TCL_VERSION@        $(DOTVERSION)
+@TCL_MAJOR_VERSION@  $(TCL_MAJOR_VERSION)
+@TCL_MINOR_VERSION@  $(TCL_MINOR_VERSION)
+@TCL_PATCH_LEVEL@    $(TCL_PATCH_LEVEL)
+@CC@                 $(CC)
+@DEFS@               $(TCL_CFLAGS)
+@CFLAGS_DEBUG@       -nologo -c -W3 -YX -Fp$(TMP_DIR)\ -MDd
+@CFLAGS_OPTIMIZE@    -nologo -c -W3 -YX -Fp$(TMP_DIR)\ -MD
+@LDFLAGS_DEBUG@      -nologo -machine:$(MACHINE) -debug -debugtype:cv
+@LDFLAGS_OPTIMIZE@   -nologo -machine:$(MACHINE) -release -opt:ref -opt:icf,3
+@TCL_DBGX@           $(SUFX)
+@TCL_LIB_FILE@       $(PROJECT)$(VERSION)$(SUFX).lib
+@TCL_NEEDS_EXP_FILE@
+@LIBS@               $(baselibs)
+@prefix@             $(_INSTALLDIR)
+@exec_prefix@        $(BIN_INSTALL_DIR)
+@SHLIB_CFLAGS@
+@STLIB_CFLAGS@
+@CFLAGS_WARNING@     -W3
+@EXTRA_CFLAGS@       -YX
+@SHLIB_LD@           $(link32) $(dlllflags)
+@STLIB_LD@           $(lib32) -nologo
+@SHLIB_LD_LIBS@      $(baselibs)
+@SHLIB_SUFFIX@       .dll
+@DL_LIBS@
+@LDFLAGS@
+@TCL_CC_SEARCH_FLAGS@
+@TCL_LD_SEARCH_FLAGS@
+@LIBOBJS@
+@RANLIB@
+@TCL_LIB_FLAG@
+@TCL_BUILD_LIB_SPEC@
+@TCL_LIB_SPEC@       $(LIB_INSTALL_DIR)\$(PROJECT)$(VERSION)$(SUFX).lib
+@TCL_INCLUDE_SPEC@   -I$(INCLUDE_INSTALL_DIR)
+@TCL_LIB_VERSIONS_OK@
+@TCL_SRC_DIR@        $(ROOT)
+@TCL_PACKAGE_PATH@
+@TCL_STUB_LIB_FILE@  $(TCLSTUBLIBNAME)
+@TCL_STUB_LIB_FLAG@  $(TCLSTUBLIBNAME)
+@TCL_STUB_LIB_SPEC@  -L$(LIB_INSTALL_DIR) $(TCLSTUBLIBNAME)
+@TCL_THREADS@        $(TCL_THREADS)
+@TCL_BUILD_STUB_LIB_SPEC@ -L$(OUT_DIR) $(TCLSTUBLIBNAME)
+@TCL_BUILD_STUB_LIB_PATH@ $(TCLSTUBLIB)
+@TCL_STUB_LIB_PATH@  $(LIB_INSTALL_DIR)\$(TCLSTUBLIBNAME)
+@CFG_TCL_EXPORT_FILE_SUFFIX@  $(VERSION)$(SUFX).lib
+@CFG_TCL_SHARED_LIB_SUFFIX@   $(VERSION)$(SUFX).dll
+@CFG_TCL_UNSHARED_LIB_SUFFIX@ $(VERSION)$(SUFX).lib
+!if $(STATIC_BUILD)
+@TCL_SHARED_BUILD@   0
+!else
+@TCL_SHARED_BUILD@   1
+!endif
+<<
+
+
+#---------------------------------------------------------------------
+# The following target generates the file generic/tclDate.c
+# from the yacc grammar found in generic/tclGetDate.y.  This is
+# only run by hand as yacc is not available in all environments.
+# The name of the .c file is different than the name of the .y file
+# so that make doesn't try to automatically regenerate the .c file.
+#---------------------------------------------------------------------
+
+gendate:
+	bison --output-file=$(GENERICDIR)/tclDate.c \
+	--name-prefix=TclDate \
+	$(GENERICDIR)/tclGetDate.y
+
+#---------------------------------------------------------------------
+# Special case object file targets
+#---------------------------------------------------------------------
+
+$(TMP_DIR)\testMain.obj: $(WINDIR)\tclAppInit.c
+	$(cc32) $(TCL_CFLAGS) -DTCL_TEST \
+	    -DTCL_USE_STATIC_PACKAGES=$(TCL_USE_STATIC_PACKAGES) \
+	    -Fo$@ $?
+
+$(TMP_DIR)\tclMain2.obj: $(GENERICDIR)\tclMain.c
+	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -DTCL_ASCII_MAIN \
+	    -Fo$@ $?
+
+$(TMP_DIR)\tclTest.obj: $(GENERICDIR)\tclTest.c
+	$(cc32) $(TCL_CFLAGS) -Fo$@ $?
+
+$(TMP_DIR)\tclTestObj.obj: $(GENERICDIR)\tclTestObj.c
+	$(cc32) $(TCL_CFLAGS) -Fo$@ $?
+
+$(TMP_DIR)\tclWinTest.obj: $(WINDIR)\tclWinTest.c
+	$(cc32) $(TCL_CFLAGS) -Fo$@ $?
+
+$(TMP_DIR)\tclZlib.obj: $(GENERICDIR)\tclZlib.c
+	$(cc32) $(TCL_CFLAGS) -I$(COMPATDIR)\zlib -DBUILD_tcl -Fo$@ $?
+
+$(TMP_DIR)\tclPkgConfig.obj: $(GENERICDIR)\tclPkgConfig.c
+	$(cc32) -DBUILD_tcl $(TCL_CFLAGS) \
+	-DCFG_INSTALL_LIBDIR="\"$(LIB_INSTALL_DIR:\=\\)\"" \
+	-DCFG_INSTALL_BINDIR="\"$(BIN_INSTALL_DIR:\=\\)\"" \
+	-DCFG_INSTALL_SCRDIR="\"$(SCRIPT_INSTALL_DIR:\=\\)\"" \
+	-DCFG_INSTALL_INCDIR="\"$(INCLUDE_INSTALL_DIR:\=\\)\"" \
+	-DCFG_INSTALL_DOCDIR="\"$(DOC_INSTALL_DIR:\=\\)\""	\
+	-DCFG_RUNTIME_LIBDIR="\"$(LIB_INSTALL_DIR:\=\\)\"" \
+	-DCFG_RUNTIME_BINDIR="\"$(BIN_INSTALL_DIR:\=\\)\"" \
+	-DCFG_RUNTIME_SCRDIR="\"$(SCRIPT_INSTALL_DIR:\=\\)\"" \
+	-DCFG_RUNTIME_INCDIR="\"$(INCLUDE_INSTALL_DIR:\=\\)\"" \
+	-DCFG_RUNTIME_DOCDIR="\"$(DOC_INSTALL_DIR:\=\\)\""     \
+	-Fo$@ $?
+
+$(TMP_DIR)\tclAppInit.obj: $(WINDIR)\tclAppInit.c
+	$(cc32) $(TCL_CFLAGS) \
+	    -DTCL_USE_STATIC_PACKAGES=$(TCL_USE_STATIC_PACKAGES) \
+	    -Fo$@ $?
+
+### The following objects should be built using the stub interfaces
+### *ALL* extensions need to built with -DTCL_THREADS=1
+
+$(TMP_DIR)\tclWinReg.obj: $(WINDIR)\tclWinReg.c
+!if $(STATIC_BUILD)
+	$(cc32) $(TCL_CFLAGS) -DTCL_THREADS=1 -DSTATIC_BUILD -Fo$@ $?
+!else
+	$(cc32) $(TCL_CFLAGS) -DTCL_THREADS=1 -DUSE_TCL_STUBS -Fo$@ $?
+!endif
+
+
+$(TMP_DIR)\tclWinDde.obj: $(WINDIR)\tclWinDde.c
+!if $(STATIC_BUILD)
+	$(cc32) $(TCL_CFLAGS) -DTCL_THREADS=1 -DSTATIC_BUILD -Fo$@ $?
+!else
+	$(cc32) $(TCL_CFLAGS) -DTCL_THREADS=1 -DUSE_TCL_STUBS -Fo$@ $?
+!endif
+
+
+### The following objects are part of the stub library and should not
+### be built as DLL objects.  -Zl is used to avoid a dependency on any
+### specific C run-time.
+
+$(TMP_DIR)\tclStubLib.obj: $(GENERICDIR)\tclStubLib.c
+	$(cc32) $(STUB_CFLAGS) -Zl -DSTATIC_BUILD $(TCL_INCLUDES) -Fo$@ $?
+
+$(TMP_DIR)\tclTomMathStubLib.obj: $(GENERICDIR)\tclTomMathStubLib.c
+	$(cc32) $(STUB_CFLAGS) -Zl -DSTATIC_BUILD $(TCL_INCLUDES) -Fo$@ $?
+
+$(TMP_DIR)\tclOOStubLib.obj: $(GENERICDIR)\tclOOStubLib.c
+	$(cc32) $(STUB_CFLAGS) -Zl -DSTATIC_BUILD $(TCL_INCLUDES) -Fo$@ $?
+
+$(TMP_DIR)\tclsh.exe.manifest: $(WINDIR)\tclsh.exe.manifest.in
+	@nmakehlp -s << $** >$@
+@MACHINE@	  $(MACHINE:IX86=X86)
+@TCL_WIN_VERSION@  $(DOTVERSION).0.0
+<<
+
+#---------------------------------------------------------------------
+# Generate the source dependencies.  Having dependency rules will
+# improve incremental build accuracy without having to resort to a
+# full rebuild just because some non-global header file like
+# tclCompile.h was changed.  These rules aren't needed when building
+# from scratch.
+#---------------------------------------------------------------------
+
+depend:
+!if !exist($(TCLSH))
+	@echo Build tclsh first!
+!else
+	$(TCLSH) $(TOOLSDIR:\=/)/mkdepend.tcl -vc32 -out:"$(OUT_DIR)\depend.mk" \
+		-passthru:"-DBUILD_tcl $(TCL_INCLUDES)" $(GENERICDIR),$$(GENERICDIR) \
+		$(COMPATDIR),$$(COMPATDIR) $(TOMMATHDIR),$$(TOMMATHDIR) $(WINDIR),$$(WINDIR) @<<
+$(TCLOBJS)
+<<
+!endif
+
+#---------------------------------------------------------------------
+# Dependency rules
+#---------------------------------------------------------------------
+
+!if exist("$(OUT_DIR)\depend.mk")
+!include "$(OUT_DIR)\depend.mk"
+!message *** Dependency rules in use.
+!else
+!message *** Dependency rules are not being used.
+!endif
+
+### add a spacer in the output
+!message
+
+
+#---------------------------------------------------------------------
+# Implicit rules.  A limitation exists with nmake that requires that
+# source directory can not contain spaces in the path.  This an
+# absolute.
+#---------------------------------------------------------------------
+
+{$(WINDIR)}.c{$(TMP_DIR)}.obj::
+	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<
+$<
+<<
+
+{$(TOMMATHDIR)}.c{$(TMP_DIR)}.obj::
+	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<
+$<
+<<
+
+{$(GENERICDIR)}.c{$(TMP_DIR)}.obj::
+	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<
+$<
+<<
+
+{$(COMPATDIR)}.c{$(TMP_DIR)}.obj::
+	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<
+$<
+<<
+
+{$(COMPATDIR)\zlib}.c{$(TMP_DIR)}.obj::
+	$(cc32) $(TCL_CFLAGS) -DBUILD_tcl -Fo$(TMP_DIR)\ @<<
+$<
+<<
+
+{$(WINDIR)}.rc{$(TMP_DIR)}.res:
+	$(rc32) -fo $@ -r -i "$(GENERICDIR)" -i "$(TMP_DIR)" \
+	    -d DEBUG=$(DEBUG) -d UNCHECKED=$(UNCHECKED) \
+	    -d TCL_THREADS=$(TCL_THREADS) \
+	    -d STATIC_BUILD=$(STATIC_BUILD) \
+	    $<
+
+$(TMP_DIR)\tclsh.res: $(TMP_DIR)\tclsh.exe.manifest
+
+.SUFFIXES:
+.SUFFIXES:.c .rc
+
+
+#---------------------------------------------------------------------
+# Installation.
+#---------------------------------------------------------------------
+
+install-binaries:
+	@echo Installing to '$(_INSTALLDIR)'
+	@echo Installing $(TCLLIBNAME)
+!if "$(TCLLIB)" != "$(TCLIMPLIB)"
+	@$(CPY) "$(TCLLIB)" "$(BIN_INSTALL_DIR)\"
+!endif
+	@$(CPY) "$(TCLIMPLIB)" "$(LIB_INSTALL_DIR)\"
+!if exist($(TCLSH))
+	@echo Installing $(TCLSHNAME)
+	@$(CPY) "$(TCLSH)" "$(BIN_INSTALL_DIR)\"
+!endif
+	@echo Installing $(TCLSTUBLIBNAME)
+	@$(CPY) "$(TCLSTUBLIB)" "$(LIB_INSTALL_DIR)\"
+
+#" emacs fix
+
+install-libraries: tclConfig install-msgs install-tzdata
+	@if not exist "$(SCRIPT_INSTALL_DIR)$(NULL)" \
+		$(MKDIR) "$(SCRIPT_INSTALL_DIR)"
+	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8$(NULL)" \
+		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8"
+	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4$(NULL)" \
+		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4"
+	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4\platform$(NULL)" \
+		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4\platform"
+	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.5$(NULL)" \
+		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.5"
+	@if not exist "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.6$(NULL)" \
+		$(MKDIR) "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.6"
+	@echo Installing header files
+	@$(CPY) "$(GENERICDIR)\tcl.h"             "$(INCLUDE_INSTALL_DIR)\"
+	@$(CPY) "$(GENERICDIR)\tclDecls.h"        "$(INCLUDE_INSTALL_DIR)\"
+	@$(CPY) "$(GENERICDIR)\tclOO.h"           "$(INCLUDE_INSTALL_DIR)\"
+	@$(CPY) "$(GENERICDIR)\tclOODecls.h"      "$(INCLUDE_INSTALL_DIR)\"
+	@$(CPY) "$(GENERICDIR)\tclPlatDecls.h"    "$(INCLUDE_INSTALL_DIR)\"
+	@$(CPY) "$(GENERICDIR)\tclTomMath.h"      "$(INCLUDE_INSTALL_DIR)\"
+	@$(CPY) "$(GENERICDIR)\tclTomMathDecls.h" "$(INCLUDE_INSTALL_DIR)\"
+	@$(CPY) "$(TOMMATHDIR)\tommath_class.h"   "$(INCLUDE_INSTALL_DIR)\"
+	@$(CPY) "$(TOMMATHDIR)\tommath_superclass.h" "$(INCLUDE_INSTALL_DIR)\"
+	@echo Installing library files to $(SCRIPT_INSTALL_DIR)
+	@$(CPY) "$(ROOT)\library\history.tcl"     "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\init.tcl"        "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\clock.tcl"       "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\tm.tcl"          "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\parray.tcl"      "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\safe.tcl"        "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\tclIndex"        "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\package.tcl"     "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\word.tcl"        "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(ROOT)\library\auto.tcl"        "$(SCRIPT_INSTALL_DIR)\"
+	@$(CPY) "$(OUT_DIR)\tclConfig.sh"         "$(LIB_INSTALL_DIR)\"
+	@$(CPY) "$(WINDIR)\tclooConfig.sh"        "$(LIB_INSTALL_DIR)\"
+	@echo Installing library http1.0 directory
+	@$(CPY) "$(ROOT)\library\http1.0\*.tcl" \
+	    "$(SCRIPT_INSTALL_DIR)\http1.0\"
+	@echo Installing library opt0.4 directory
+	@$(CPY) "$(ROOT)\library\opt\*.tcl" \
+	    "$(SCRIPT_INSTALL_DIR)\opt0.4\"
+	@echo Installing package http $(PKG_HTTP_VER) as a Tcl Module
+	@$(COPY) "$(ROOT)\library\http\http.tcl" \
+	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.6\http-$(PKG_HTTP_VER).tm"
+	@echo Installing package msgcat $(PKG_MSGCAT_VER) as a Tcl Module
+	@$(COPY) "$(ROOT)\library\msgcat\msgcat.tcl" \
+	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.5\msgcat-$(PKG_MSGCAT_VER).tm"
+	@echo Installing package tcltest $(PKG_TCLTEST_VER) as a Tcl Module
+	@$(COPY) "$(ROOT)\library\tcltest\tcltest.tcl" \
+	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.5\tcltest-$(PKG_TCLTEST_VER).tm"
+	@echo Installing package platform $(PKG_PLATFORM_VER) as a Tcl Module
+	@$(COPY) "$(ROOT)\library\platform\platform.tcl" \
+	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4\platform-$(PKG_PLATFORM_VER).tm"
+	@echo Installing package platform::shell $(PKG_SHELL_VER) as a Tcl Module
+	@$(COPY) "$(ROOT)\library\platform\shell.tcl" \
+	    "$(SCRIPT_INSTALL_DIR)\..\tcl8\8.4\platform\shell-$(PKG_SHELL_VER).tm"
+	@echo Installing $(TCLDDELIBNAME)
+!if $(STATIC_BUILD)
+!if !$(TCL_USE_STATIC_PACKAGES)
+	@$(CPY) "$(TCLDDELIB)" "$(LIB_INSTALL_DIR)\"
+!endif
+!else
+	@$(CPY) "$(TCLDDELIB)" "$(LIB_INSTALL_DIR)\dde$(DDEDOTVERSION)\"
+	@$(CPY) "$(ROOT)\library\dde\pkgIndex.tcl" \
+	    "$(LIB_INSTALL_DIR)\dde$(DDEDOTVERSION)\"
+!endif
+	@echo Installing $(TCLREGLIBNAME)
+!if $(STATIC_BUILD)
+!if !$(TCL_USE_STATIC_PACKAGES)
+	@$(CPY) "$(TCLREGLIB)" "$(LIB_INSTALL_DIR)\"
+!endif
+!else
+	@$(CPY) "$(TCLREGLIB)" "$(LIB_INSTALL_DIR)\reg$(REGDOTVERSION)\"
+	@$(CPY) "$(ROOT)\library\reg\pkgIndex.tcl" \
+	    "$(LIB_INSTALL_DIR)\reg$(REGDOTVERSION)\"
+!endif
+	@echo Installing encodings
+	@$(CPY) "$(ROOT)\library\encoding\*.enc" \
+		"$(SCRIPT_INSTALL_DIR)\encoding\"
+
+#" emacs fix
+
+install-tzdata:
+	@echo Installing time zone data
+	@set TCL_LIBRARY=$(ROOT:\=/)/library
+	@$(TCLSH_NATIVE) "$(ROOT:\=/)/tools/installData.tcl" \
+	    "$(ROOT:\=/)/library/tzdata" "$(SCRIPT_INSTALL_DIR)/tzdata"
+
+install-msgs:
+	@echo Installing message catalogs
+	@set TCL_LIBRARY=$(ROOT:\=/)/library
+	@$(TCLSH_NATIVE) "$(ROOT:\=/)/tools/installData.tcl" \
+	    "$(ROOT:\=/)/library/msgs" "$(SCRIPT_INSTALL_DIR)/msgs"
+
+#---------------------------------------------------------------------
+# Clean up
+#---------------------------------------------------------------------
+
+tidy:
+!if "$(TCLLIB)" != "$(TCLIMPLIB)"
+	@echo Removing $(TCLLIB) ...
+	@if exist $(TCLLIB) del $(TCLLIB)
+!endif
+	@echo Removing $(TCLIMPLIB) ...
+	@if exist $(TCLIMPLIB) del $(TCLIMPLIB)
+	@echo Removing $(TCLSH) ...
+	@if exist $(TCLSH) del $(TCLSH)
+	@echo Removing $(TCLTEST) ...
+	@if exist $(TCLTEST) del $(TCLTEST)
+	@echo Removing $(TCLDDELIB) ...
+	@if exist $(TCLDDELIB) del $(TCLDDELIB)
+	@echo Removing $(TCLREGLIB) ...
+	@if exist $(TCLREGLIB) del $(TCLREGLIB)
+
+clean: clean-pkgs
+	@echo Cleaning $(TMP_DIR)\* ...
+	@if exist $(TMP_DIR)\nul $(RMDIR) $(TMP_DIR)
+	@echo Cleaning $(WINDIR)\nmakehlp.obj ...
+	@if exist $(WINDIR)\nmakehlp.obj del $(WINDIR)\nmakehlp.obj
+	@echo Cleaning $(WINDIR)\nmakehlp.exe ...
+	@if exist $(WINDIR)\nmakehlp.exe del $(WINDIR)\nmakehlp.exe
+	@echo Cleaning $(WINDIR)\_junk.pch ...
+	@if exist $(WINDIR)\_junk.pch del $(WINDIR)\_junk.pch
+	@echo Cleaning $(WINDIR)\vercl.x ...
+	@if exist $(WINDIR)\vercl.x del $(WINDIR)\vercl.x
+	@echo Cleaning $(WINDIR)\vercl.i ...
+	@if exist $(WINDIR)\vercl.i del $(WINDIR)\vercl.i
+	@echo Cleaning $(WINDIR)\versions.vc ...
+	@if exist $(WINDIR)\versions.vc del $(WINDIR)\versions.vc
+
+realclean: hose
+
+hose:
+	@echo Hosing $(OUT_DIR)\* ...
+	@if exist $(OUT_DIR)\nul $(RMDIR) $(OUT_DIR)
+
+# Local Variables:
+# mode: makefile
+# End:
diff --git a/win/tclWinTime.c b/win/tclWinTime.c
index 2ea9e86..e1aff48 100644
--- a/win/tclWinTime.c
+++ b/win/tclWinTime.c
@@ -110,6 +110,17 @@ static TimeInfo timeInfo = {
 };
 
 /*
+ * Scale to convert wide click values from the TclpGetWideClicks native
+ * resolution to microsecond resolution and back.
+ */
+static struct {
+    int initialized;		/* 1 if initialized, 0 otherwise */
+    int perfCounter;		/* 1 if performance counter usable for wide clicks */
+    double microsecsScale;	/* Denominator scale between clock / microsecs */
+} wideClick = {0, 0.0};
+
+
+/*
  * Declarations for functions defined later in this file.
  */
 
@@ -123,6 +134,7 @@ static Tcl_WideInt	AccumulateSample(Tcl_WideInt perfCounter,
 			    Tcl_WideUInt fileTime);
 static void		NativeScaleTime(Tcl_Time* timebuf,
 			    ClientData clientData);
+static Tcl_WideInt	NativeGetMicroseconds(void);
 static void		NativeGetTime(Tcl_Time* timebuf,
 			    ClientData clientData);
 
@@ -154,10 +166,19 @@ ClientData tclTimeClientData = NULL;
 unsigned long
 TclpGetSeconds(void)
 {
-    Tcl_Time t;
+    Tcl_WideInt usecSincePosixEpoch;
 
-    tclGetTimeProcPtr(&t, tclTimeClientData);	/* Tcl_GetTime inlined. */
-    return t.sec;
+    /* Try to use high resolution timer */
+    if ( tclGetTimeProcPtr == NativeGetTime
+      && (usecSincePosixEpoch = NativeGetMicroseconds())
+    ) {
+	return usecSincePosixEpoch / 1000000;
+    } else {
+	Tcl_Time t;
+
+	tclGetTimeProcPtr(&t, tclTimeClientData);	/* Tcl_GetTime inlined. */
+	return t.sec;
+    }
 }
 
 /*
@@ -182,19 +203,147 @@ TclpGetSeconds(void)
 unsigned long
 TclpGetClicks(void)
 {
-    /*
-     * Use the Tcl_GetTime abstraction to get the time in microseconds, as
-     * nearly as we can, and return it.
-     */
+    Tcl_WideInt usecSincePosixEpoch;
+
+    /* Try to use high resolution timer */
+    if ( tclGetTimeProcPtr == NativeGetTime
+      && (usecSincePosixEpoch = NativeGetMicroseconds())
+    ) {
+	return (unsigned long)usecSincePosixEpoch;
+    } else {
+	/*
+	* Use the Tcl_GetTime abstraction to get the time in microseconds, as
+	* nearly as we can, and return it.
+	*/
+
+	Tcl_Time now;		/* Current Tcl time */
+
+	tclGetTimeProcPtr(&now, tclTimeClientData);	/* Tcl_GetTime inlined */
+	return (unsigned long)(now.sec * 1000000) + now.usec;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpGetWideClicks --
+ *
+ *	This procedure returns a WideInt value that represents the highest
+ *	resolution clock in microseconds available on the system.
+ *
+ * Results:
+ *	Number of microseconds (from some start time).
+ *
+ * Side effects:
+ *	This should be used for time-delta resp. for measurement purposes
+ *	only, because on some platforms can return microseconds from some
+ *	start time (not from the epoch).
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_WideInt
+TclpGetWideClicks(void)
+{
+    LARGE_INTEGER curCounter;
+
+    if (!wideClick.initialized) {
+	LARGE_INTEGER perfCounterFreq;
+
+	/*
+	 * The frequency of the performance counter is fixed at system boot and
+	 * is consistent across all processors. Therefore, the frequency need 
+	 * only be queried upon application initialization.
+	 */
+	if (QueryPerformanceFrequency(&perfCounterFreq)) {
+	    wideClick.perfCounter = 1;
+	    wideClick.microsecsScale = 1000000.0 / perfCounterFreq.QuadPart;
+	} else {
+	    /* fallback using microseconds */
+	    wideClick.perfCounter = 0;
+	    wideClick.microsecsScale = 1;
+	}
+	
+	wideClick.initialized = 1;
+    }
+    if (wideClick.perfCounter) {
+	if (QueryPerformanceCounter(&curCounter)) {
+	    return (Tcl_WideInt)curCounter.QuadPart;
+	}
+	/* fallback using microseconds */
+	wideClick.perfCounter = 0;
+	wideClick.microsecsScale = 1;
+	return TclpGetMicroseconds();
+    } else {
+    	return TclpGetMicroseconds();
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpWideClickInMicrosec --
+ *
+ *	This procedure return scale to convert wide click values from the 
+ *	TclpGetWideClicks native resolution to microsecond resolution
+ *	and back.
+ *
+ * Results:
+ * 	1 click in microseconds as double.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+double
+TclpWideClickInMicrosec(void)
+{
+    if (!wideClick.initialized) {
+    	(void)TclpGetWideClicks();	/* initialize */
+    }
+    return wideClick.microsecsScale;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpGetMicroseconds --
+ *
+ *	This procedure returns a WideInt value that represents the highest
+ *	resolution clock in microseconds available on the system.
+ *
+ * Results:
+ *	Number of microseconds (from the epoch).
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
 
-    Tcl_Time now;		/* Current Tcl time */
-    unsigned long retval;	/* Value to return */
+Tcl_WideInt 
+TclpGetMicroseconds(void)
+{
+    Tcl_WideInt usecSincePosixEpoch;
 
-    tclGetTimeProcPtr(&now, tclTimeClientData);	/* Tcl_GetTime inlined */
+    /* Try to use high resolution timer */
+    if ( tclGetTimeProcPtr == NativeGetTime
+      && (usecSincePosixEpoch = NativeGetMicroseconds())
+    ) {
+	return usecSincePosixEpoch;
+    } else {
+	/*
+	* Use the Tcl_GetTime abstraction to get the time in microseconds, as
+	* nearly as we can, and return it.
+	*/
 
-    retval = (now.sec * 1000000) + now.usec;
-    return retval;
+	Tcl_Time now;
 
+	tclGetTimeProcPtr(&now, tclTimeClientData);	/* Tcl_GetTime inlined */
+	return (((Tcl_WideInt)now.sec) * 1000000) + now.usec;
+    }
 }
 
 /*
@@ -223,7 +372,17 @@ void
 Tcl_GetTime(
     Tcl_Time *timePtr)		/* Location to store time information. */
 {
-    tclGetTimeProcPtr(timePtr, tclTimeClientData);
+    Tcl_WideInt usecSincePosixEpoch;
+
+    /* Try to use high resolution timer */
+    if ( tclGetTimeProcPtr == NativeGetTime
+      && (usecSincePosixEpoch = NativeGetMicroseconds())
+    ) {
+	timePtr->sec = (long) (usecSincePosixEpoch / 1000000);
+	timePtr->usec = (unsigned long) (usecSincePosixEpoch % 1000000);
+    } else {
+    	tclGetTimeProcPtr(timePtr, tclTimeClientData);
+    }
 }
 
 /*
@@ -256,13 +415,14 @@ NativeScaleTime(
 /*
  *----------------------------------------------------------------------
  *
- * NativeGetTime --
+ * NativeGetMicroseconds --
  *
- *	TIP #233: Gets the current system time in seconds and microseconds
- *	since the beginning of the epoch: 00:00 UCT, January 1, 1970.
+ *	Gets the current system time in microseconds since the beginning
+ *	of the epoch: 00:00 UCT, January 1, 1970.
  *
  * Results:
- *	Returns the current time in timePtr.
+ *	Returns the wide integer with number of microseconds from the epoch, or
+ *	0 if high resolution timer is not available.
  *
  * Side effects:
  *	On the first call, initializes a set of static variables to keep track
@@ -275,13 +435,12 @@ NativeScaleTime(
  *----------------------------------------------------------------------
  */
 
-static void
-NativeGetTime(
-    Tcl_Time *timePtr,
-    ClientData clientData)
+static Tcl_WideInt
+NativeGetMicroseconds(void)
 {
-    struct _timeb t;
-
+    static LARGE_INTEGER posixEpoch;
+				/* Posix epoch expressed as 100-ns ticks since
+				 * the windows epoch. */
     /*
      * Initialize static storage on the first trip through.
      *
@@ -292,6 +451,10 @@ NativeGetTime(
     if (!timeInfo.initialized) {
 	TclpInitLock();
 	if (!timeInfo.initialized) {
+
+	    posixEpoch.LowPart = 0xD53E8000;
+	    posixEpoch.HighPart = 0x019DB1DE;
+
 	    timeInfo.perfCounterAvailable =
 		    QueryPerformanceFrequency(&timeInfo.nominalFreq);
 
@@ -404,15 +567,9 @@ NativeGetTime(
 				/* Current performance counter. */
 	Tcl_WideInt curFileTime;/* Current estimated time, expressed as 100-ns
 				 * ticks since the Windows epoch. */
-	static LARGE_INTEGER posixEpoch;
-				/* Posix epoch expressed as 100-ns ticks since
-				 * the windows epoch. */
 	Tcl_WideInt usecSincePosixEpoch;
 				/* Current microseconds since Posix epoch. */
 
-	posixEpoch.LowPart = 0xD53E8000;
-	posixEpoch.HighPart = 0x019DB1DE;
-
 	QueryPerformanceCounter(&curCounter);
 
 	/*
@@ -432,9 +589,7 @@ NativeGetTime(
 	if (curCounter.QuadPart <= perfCounterLastCall.QuadPart) {
 	    usecSincePosixEpoch =
 		(fileTimeLastCall.QuadPart - posixEpoch.QuadPart) / 10;
-	    timePtr->sec = (long) (usecSincePosixEpoch / 1000000);
-	    timePtr->usec = (unsigned long) (usecSincePosixEpoch % 1000000);
-	    return;
+	    return usecSincePosixEpoch;
 	}
 
 	/*
@@ -455,19 +610,57 @@ NativeGetTime(
 		    * 10000000 / curCounterFreq.QuadPart);
 
 	    usecSincePosixEpoch = (curFileTime - posixEpoch.QuadPart) / 10;
-	    timePtr->sec = (long) (usecSincePosixEpoch / 1000000);
-	    timePtr->usec = (unsigned long) (usecSincePosixEpoch % 1000000);
-	    return;
+	    return usecSincePosixEpoch;
 	}
     }
 
     /*
-     * High resolution timer is not available. Just use ftime.
+     * High resolution timer is not available.
      */
+    return 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * NativeGetTime --
+ *
+ *	TIP #233: Gets the current system time in seconds and microseconds
+ *	since the beginning of the epoch: 00:00 UCT, January 1, 1970.
+ *
+ * Results:
+ *	Returns the current time in timePtr.
+ *
+ * Side effects:
+ *	See NativeGetMicroseconds for more information.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+NativeGetTime(
+    Tcl_Time *timePtr,
+    ClientData clientData)
+{
+    Tcl_WideInt usecSincePosixEpoch;
 
-    _ftime(&t);
-    timePtr->sec = (long)t.time;
-    timePtr->usec = t.millitm * 1000;
+    /*
+     * Try to use high resolution timer.
+     */
+    if ( (usecSincePosixEpoch = NativeGetMicroseconds()) ) {
+	timePtr->sec = (long) (usecSincePosixEpoch / 1000000);
+	timePtr->usec = (unsigned long) (usecSincePosixEpoch % 1000000);
+    } else {
+	/*
+	* High resolution timer is not available. Just use ftime.
+	*/
+
+	struct _timeb t;
+
+	_ftime(&t);
+	timePtr->sec = (long)t.time;
+	timePtr->usec = t.millitm * 1000;
+    }
 }
 
 /*