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+/*
+ * tclGetDate.y --
+ *
+ * Contains yacc grammar for parsing date and time strings.
+ * The output of this file should be the file tclDate.c which
+ * is used directly in the Tcl sources.
+ *
+ * Copyright (c) 1992-1995 Karl Lehenbauer and Mark Diekhans.
+ * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tclGetDate.y 1.34 97/02/03 14:53:54
+ */
+
+%{
+/*
+ * tclDate.c --
+ *
+ * This file is generated from a yacc grammar defined in
+ * the file tclGetDate.y. It should not be edited directly.
+ *
+ * Copyright (c) 1992-1995 Karl Lehenbauer and Mark Diekhans.
+ * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCSID
+ */
+
+#include "tclInt.h"
+#include "tclPort.h"
+
+#ifdef MAC_TCL
+# define EPOCH 1904
+# define START_OF_TIME 1904
+# define END_OF_TIME 2039
+#else
+# define EPOCH 1970
+# define START_OF_TIME 1902
+# define END_OF_TIME 2037
+#endif
+
+/*
+ * The offset of tm_year of struct tm returned by localtime, gmtime, etc.
+ * I don't know how universal this is; K&R II, the NetBSD manpages, and
+ * ../compat/strftime.c all agree that tm_year is the year-1900. However,
+ * some systems may have a different value. This #define should be the
+ * same as in ../compat/strftime.c.
+ */
+#define TM_YEAR_BASE 1900
+
+#define HOUR(x) ((int) (60 * x))
+#define SECSPERDAY (24L * 60L * 60L)
+
+
+/*
+ * An entry in the lexical lookup table.
+ */
+typedef struct _TABLE {
+ char *name;
+ int type;
+ time_t value;
+} TABLE;
+
+
+/*
+ * Daylight-savings mode: on, off, or not yet known.
+ */
+typedef enum _DSTMODE {
+ DSTon, DSToff, DSTmaybe
+} DSTMODE;
+
+/*
+ * Meridian: am, pm, or 24-hour style.
+ */
+typedef enum _MERIDIAN {
+ MERam, MERpm, MER24
+} MERIDIAN;
+
+
+/*
+ * Global variables. We could get rid of most of these by using a good
+ * union as the yacc stack. (This routine was originally written before
+ * yacc had the %union construct.) Maybe someday; right now we only use
+ * the %union very rarely.
+ */
+static char *yyInput;
+static DSTMODE yyDSTmode;
+static time_t yyDayOrdinal;
+static time_t yyDayNumber;
+static int yyHaveDate;
+static int yyHaveDay;
+static int yyHaveRel;
+static int yyHaveTime;
+static int yyHaveZone;
+static time_t yyTimezone;
+static time_t yyDay;
+static time_t yyHour;
+static time_t yyMinutes;
+static time_t yyMonth;
+static time_t yySeconds;
+static time_t yyYear;
+static MERIDIAN yyMeridian;
+static time_t yyRelMonth;
+static time_t yyRelSeconds;
+
+
+/*
+ * Prototypes of internal functions.
+ */
+static void yyerror _ANSI_ARGS_((char *s));
+static time_t ToSeconds _ANSI_ARGS_((time_t Hours, time_t Minutes,
+ time_t Seconds, MERIDIAN Meridian));
+static int Convert _ANSI_ARGS_((time_t Month, time_t Day, time_t Year,
+ time_t Hours, time_t Minutes, time_t Seconds,
+ MERIDIAN Meridia, DSTMODE DSTmode, time_t *TimePtr));
+static time_t DSTcorrect _ANSI_ARGS_((time_t Start, time_t Future));
+static time_t RelativeDate _ANSI_ARGS_((time_t Start, time_t DayOrdinal,
+ time_t DayNumber));
+static int RelativeMonth _ANSI_ARGS_((time_t Start, time_t RelMonth,
+ time_t *TimePtr));
+static int LookupWord _ANSI_ARGS_((char *buff));
+static int yylex _ANSI_ARGS_((void));
+
+int
+yyparse _ANSI_ARGS_((void));
+%}
+
+%union {
+ time_t Number;
+ enum _MERIDIAN Meridian;
+}
+
+%token tAGO tDAY tDAYZONE tID tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT
+%token tSEC_UNIT tSNUMBER tUNUMBER tZONE tEPOCH tDST
+
+%type <Number> tDAY tDAYZONE tMINUTE_UNIT tMONTH tMONTH_UNIT tDST
+%type <Number> tSEC_UNIT tSNUMBER tUNUMBER tZONE
+%type <Meridian> tMERIDIAN o_merid
+
+%%
+
+spec : /* NULL */
+ | spec item
+ ;
+
+item : time {
+ yyHaveTime++;
+ }
+ | zone {
+ yyHaveZone++;
+ }
+ | date {
+ yyHaveDate++;
+ }
+ | day {
+ yyHaveDay++;
+ }
+ | rel {
+ yyHaveRel++;
+ }
+ | number
+ ;
+
+time : tUNUMBER tMERIDIAN {
+ yyHour = $1;
+ yyMinutes = 0;
+ yySeconds = 0;
+ yyMeridian = $2;
+ }
+ | tUNUMBER ':' tUNUMBER o_merid {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = 0;
+ yyMeridian = $4;
+ }
+ | tUNUMBER ':' tUNUMBER tSNUMBER {
+ yyHour = $1;
+ yyMinutes = $3;
+ yyMeridian = MER24;
+ yyDSTmode = DSToff;
+ yyTimezone = - ($4 % 100 + ($4 / 100) * 60);
+ }
+ | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = $5;
+ yyMeridian = $6;
+ }
+ | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = $5;
+ yyMeridian = MER24;
+ yyDSTmode = DSToff;
+ yyTimezone = - ($6 % 100 + ($6 / 100) * 60);
+ }
+ ;
+
+zone : tZONE tDST {
+ yyTimezone = $1;
+ yyDSTmode = DSTon;
+ }
+ | tZONE {
+ yyTimezone = $1;
+ yyDSTmode = DSToff;
+ }
+ | tDAYZONE {
+ yyTimezone = $1;
+ yyDSTmode = DSTon;
+ }
+ ;
+
+day : tDAY {
+ yyDayOrdinal = 1;
+ yyDayNumber = $1;
+ }
+ | tDAY ',' {
+ yyDayOrdinal = 1;
+ yyDayNumber = $1;
+ }
+ | tUNUMBER tDAY {
+ yyDayOrdinal = $1;
+ yyDayNumber = $2;
+ }
+ ;
+
+date : tUNUMBER '/' tUNUMBER {
+ yyMonth = $1;
+ yyDay = $3;
+ }
+ | tUNUMBER '/' tUNUMBER '/' tUNUMBER {
+ yyMonth = $1;
+ yyDay = $3;
+ yyYear = $5;
+ }
+ | tMONTH tUNUMBER {
+ yyMonth = $1;
+ yyDay = $2;
+ }
+ | tMONTH tUNUMBER ',' tUNUMBER {
+ yyMonth = $1;
+ yyDay = $2;
+ yyYear = $4;
+ }
+ | tUNUMBER tMONTH {
+ yyMonth = $2;
+ yyDay = $1;
+ }
+ | tEPOCH {
+ yyMonth = 1;
+ yyDay = 1;
+ yyYear = EPOCH;
+ }
+ | tUNUMBER tMONTH tUNUMBER {
+ yyMonth = $2;
+ yyDay = $1;
+ yyYear = $3;
+ }
+ ;
+
+rel : relunit tAGO {
+ yyRelSeconds = -yyRelSeconds;
+ yyRelMonth = -yyRelMonth;
+ }
+ | relunit
+ ;
+
+relunit : tUNUMBER tMINUTE_UNIT {
+ yyRelSeconds += $1 * $2 * 60L;
+ }
+ | tSNUMBER tMINUTE_UNIT {
+ yyRelSeconds += $1 * $2 * 60L;
+ }
+ | tMINUTE_UNIT {
+ yyRelSeconds += $1 * 60L;
+ }
+ | tSNUMBER tSEC_UNIT {
+ yyRelSeconds += $1;
+ }
+ | tUNUMBER tSEC_UNIT {
+ yyRelSeconds += $1;
+ }
+ | tSEC_UNIT {
+ yyRelSeconds++;
+ }
+ | tSNUMBER tMONTH_UNIT {
+ yyRelMonth += $1 * $2;
+ }
+ | tUNUMBER tMONTH_UNIT {
+ yyRelMonth += $1 * $2;
+ }
+ | tMONTH_UNIT {
+ yyRelMonth += $1;
+ }
+ ;
+
+number : tUNUMBER
+ {
+ if (yyHaveTime && yyHaveDate && !yyHaveRel) {
+ yyYear = $1;
+ } else {
+ yyHaveTime++;
+ if ($1 < 100) {
+ yyHour = 0;
+ yyMinutes = $1;
+ } else {
+ yyHour = $1 / 100;
+ yyMinutes = $1 % 100;
+ }
+ yySeconds = 0;
+ yyMeridian = MER24;
+ }
+ }
+;
+
+o_merid : /* NULL */ {
+ $$ = MER24;
+ }
+ | tMERIDIAN {
+ $$ = $1;
+ }
+ ;
+
+%%
+
+/*
+ * Month and day table.
+ */
+static TABLE MonthDayTable[] = {
+ { "january", tMONTH, 1 },
+ { "february", tMONTH, 2 },
+ { "march", tMONTH, 3 },
+ { "april", tMONTH, 4 },
+ { "may", tMONTH, 5 },
+ { "june", tMONTH, 6 },
+ { "july", tMONTH, 7 },
+ { "august", tMONTH, 8 },
+ { "september", tMONTH, 9 },
+ { "sept", tMONTH, 9 },
+ { "october", tMONTH, 10 },
+ { "november", tMONTH, 11 },
+ { "december", tMONTH, 12 },
+ { "sunday", tDAY, 0 },
+ { "monday", tDAY, 1 },
+ { "tuesday", tDAY, 2 },
+ { "tues", tDAY, 2 },
+ { "wednesday", tDAY, 3 },
+ { "wednes", tDAY, 3 },
+ { "thursday", tDAY, 4 },
+ { "thur", tDAY, 4 },
+ { "thurs", tDAY, 4 },
+ { "friday", tDAY, 5 },
+ { "saturday", tDAY, 6 },
+ { NULL }
+};
+
+/*
+ * Time units table.
+ */
+static TABLE UnitsTable[] = {
+ { "year", tMONTH_UNIT, 12 },
+ { "month", tMONTH_UNIT, 1 },
+ { "fortnight", tMINUTE_UNIT, 14 * 24 * 60 },
+ { "week", tMINUTE_UNIT, 7 * 24 * 60 },
+ { "day", tMINUTE_UNIT, 1 * 24 * 60 },
+ { "hour", tMINUTE_UNIT, 60 },
+ { "minute", tMINUTE_UNIT, 1 },
+ { "min", tMINUTE_UNIT, 1 },
+ { "second", tSEC_UNIT, 1 },
+ { "sec", tSEC_UNIT, 1 },
+ { NULL }
+};
+
+/*
+ * Assorted relative-time words.
+ */
+static TABLE OtherTable[] = {
+ { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 },
+ { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 },
+ { "today", tMINUTE_UNIT, 0 },
+ { "now", tMINUTE_UNIT, 0 },
+ { "last", tUNUMBER, -1 },
+ { "this", tMINUTE_UNIT, 0 },
+ { "next", tUNUMBER, 2 },
+#if 0
+ { "first", tUNUMBER, 1 },
+/* { "second", tUNUMBER, 2 }, */
+ { "third", tUNUMBER, 3 },
+ { "fourth", tUNUMBER, 4 },
+ { "fifth", tUNUMBER, 5 },
+ { "sixth", tUNUMBER, 6 },
+ { "seventh", tUNUMBER, 7 },
+ { "eighth", tUNUMBER, 8 },
+ { "ninth", tUNUMBER, 9 },
+ { "tenth", tUNUMBER, 10 },
+ { "eleventh", tUNUMBER, 11 },
+ { "twelfth", tUNUMBER, 12 },
+#endif
+ { "ago", tAGO, 1 },
+ { "epoch", tEPOCH, 0 },
+ { NULL }
+};
+
+/*
+ * The timezone table. (Note: This table was modified to not use any floating
+ * point constants to work around an SGI compiler bug).
+ */
+static TABLE TimezoneTable[] = {
+ { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */
+ { "ut", tZONE, HOUR( 0) }, /* Universal (Coordinated) */
+ { "utc", tZONE, HOUR( 0) },
+ { "wet", tZONE, HOUR( 0) } , /* Western European */
+ { "bst", tDAYZONE, HOUR( 0) }, /* British Summer */
+ { "wat", tZONE, HOUR( 1) }, /* West Africa */
+ { "at", tZONE, HOUR( 2) }, /* Azores */
+#if 0
+ /* For completeness. BST is also British Summer, and GST is
+ * also Guam Standard. */
+ { "bst", tZONE, HOUR( 3) }, /* Brazil Standard */
+ { "gst", tZONE, HOUR( 3) }, /* Greenland Standard */
+#endif
+ { "nft", tZONE, HOUR( 7/2) }, /* Newfoundland */
+ { "nst", tZONE, HOUR( 7/2) }, /* Newfoundland Standard */
+ { "ndt", tDAYZONE, HOUR( 7/2) }, /* Newfoundland Daylight */
+ { "ast", tZONE, HOUR( 4) }, /* Atlantic Standard */
+ { "adt", tDAYZONE, HOUR( 4) }, /* Atlantic Daylight */
+ { "est", tZONE, HOUR( 5) }, /* Eastern Standard */
+ { "edt", tDAYZONE, HOUR( 5) }, /* Eastern Daylight */
+ { "cst", tZONE, HOUR( 6) }, /* Central Standard */
+ { "cdt", tDAYZONE, HOUR( 6) }, /* Central Daylight */
+ { "mst", tZONE, HOUR( 7) }, /* Mountain Standard */
+ { "mdt", tDAYZONE, HOUR( 7) }, /* Mountain Daylight */
+ { "pst", tZONE, HOUR( 8) }, /* Pacific Standard */
+ { "pdt", tDAYZONE, HOUR( 8) }, /* Pacific Daylight */
+ { "yst", tZONE, HOUR( 9) }, /* Yukon Standard */
+ { "ydt", tDAYZONE, HOUR( 9) }, /* Yukon Daylight */
+ { "hst", tZONE, HOUR(10) }, /* Hawaii Standard */
+ { "hdt", tDAYZONE, HOUR(10) }, /* Hawaii Daylight */
+ { "cat", tZONE, HOUR(10) }, /* Central Alaska */
+ { "ahst", tZONE, HOUR(10) }, /* Alaska-Hawaii Standard */
+ { "nt", tZONE, HOUR(11) }, /* Nome */
+ { "idlw", tZONE, HOUR(12) }, /* International Date Line West */
+ { "cet", tZONE, -HOUR( 1) }, /* Central European */
+ { "met", tZONE, -HOUR( 1) }, /* Middle European */
+ { "mewt", tZONE, -HOUR( 1) }, /* Middle European Winter */
+ { "mest", tDAYZONE, -HOUR( 1) }, /* Middle European Summer */
+ { "swt", tZONE, -HOUR( 1) }, /* Swedish Winter */
+ { "sst", tDAYZONE, -HOUR( 1) }, /* Swedish Summer */
+ { "fwt", tZONE, -HOUR( 1) }, /* French Winter */
+ { "fst", tDAYZONE, -HOUR( 1) }, /* French Summer */
+ { "eet", tZONE, -HOUR( 2) }, /* Eastern Europe, USSR Zone 1 */
+ { "bt", tZONE, -HOUR( 3) }, /* Baghdad, USSR Zone 2 */
+ { "it", tZONE, -HOUR( 7/2) }, /* Iran */
+ { "zp4", tZONE, -HOUR( 4) }, /* USSR Zone 3 */
+ { "zp5", tZONE, -HOUR( 5) }, /* USSR Zone 4 */
+ { "ist", tZONE, -HOUR(11/2) }, /* Indian Standard */
+ { "zp6", tZONE, -HOUR( 6) }, /* USSR Zone 5 */
+#if 0
+ /* For completeness. NST is also Newfoundland Stanard, nad SST is
+ * also Swedish Summer. */
+ { "nst", tZONE, -HOUR(13/2) }, /* North Sumatra */
+ { "sst", tZONE, -HOUR( 7) }, /* South Sumatra, USSR Zone 6 */
+#endif /* 0 */
+ { "wast", tZONE, -HOUR( 7) }, /* West Australian Standard */
+ { "wadt", tDAYZONE, -HOUR( 7) }, /* West Australian Daylight */
+ { "jt", tZONE, -HOUR(15/2) }, /* Java (3pm in Cronusland!) */
+ { "cct", tZONE, -HOUR( 8) }, /* China Coast, USSR Zone 7 */
+ { "jst", tZONE, -HOUR( 9) }, /* Japan Standard, USSR Zone 8 */
+ { "cast", tZONE, -HOUR(19/2) }, /* Central Australian Standard */
+ { "cadt", tDAYZONE, -HOUR(19/2) }, /* Central Australian Daylight */
+ { "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */
+ { "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */
+ { "gst", tZONE, -HOUR(10) }, /* Guam Standard, USSR Zone 9 */
+ { "nzt", tZONE, -HOUR(12) }, /* New Zealand */
+ { "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */
+ { "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */
+ { "idle", tZONE, -HOUR(12) }, /* International Date Line East */
+ /* ADDED BY Marco Nijdam */
+ { "dst", tDST, HOUR( 0) }, /* DST on (hour is ignored) */
+ /* End ADDED */
+ { NULL }
+};
+
+/*
+ * Military timezone table.
+ */
+static TABLE MilitaryTable[] = {
+ { "a", tZONE, HOUR( 1) },
+ { "b", tZONE, HOUR( 2) },
+ { "c", tZONE, HOUR( 3) },
+ { "d", tZONE, HOUR( 4) },
+ { "e", tZONE, HOUR( 5) },
+ { "f", tZONE, HOUR( 6) },
+ { "g", tZONE, HOUR( 7) },
+ { "h", tZONE, HOUR( 8) },
+ { "i", tZONE, HOUR( 9) },
+ { "k", tZONE, HOUR( 10) },
+ { "l", tZONE, HOUR( 11) },
+ { "m", tZONE, HOUR( 12) },
+ { "n", tZONE, HOUR(- 1) },
+ { "o", tZONE, HOUR(- 2) },
+ { "p", tZONE, HOUR(- 3) },
+ { "q", tZONE, HOUR(- 4) },
+ { "r", tZONE, HOUR(- 5) },
+ { "s", tZONE, HOUR(- 6) },
+ { "t", tZONE, HOUR(- 7) },
+ { "u", tZONE, HOUR(- 8) },
+ { "v", tZONE, HOUR(- 9) },
+ { "w", tZONE, HOUR(-10) },
+ { "x", tZONE, HOUR(-11) },
+ { "y", tZONE, HOUR(-12) },
+ { "z", tZONE, HOUR( 0) },
+ { NULL }
+};
+
+
+/*
+ * Dump error messages in the bit bucket.
+ */
+static void
+yyerror(s)
+ char *s;
+{
+}
+
+
+static time_t
+ToSeconds(Hours, Minutes, Seconds, Meridian)
+ time_t Hours;
+ time_t Minutes;
+ time_t Seconds;
+ MERIDIAN Meridian;
+{
+ if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59)
+ return -1;
+ switch (Meridian) {
+ case MER24:
+ if (Hours < 0 || Hours > 23)
+ return -1;
+ return (Hours * 60L + Minutes) * 60L + Seconds;
+ case MERam:
+ if (Hours < 1 || Hours > 12)
+ return -1;
+ return ((Hours % 12) * 60L + Minutes) * 60L + Seconds;
+ case MERpm:
+ if (Hours < 1 || Hours > 12)
+ return -1;
+ return (((Hours % 12) + 12) * 60L + Minutes) * 60L + Seconds;
+ }
+ return -1; /* Should never be reached */
+}
+
+
+static int
+Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, DSTmode, TimePtr)
+ time_t Month;
+ time_t Day;
+ time_t Year;
+ time_t Hours;
+ time_t Minutes;
+ time_t Seconds;
+ MERIDIAN Meridian;
+ DSTMODE DSTmode;
+ time_t *TimePtr;
+{
+ static int DaysInMonth[12] = {
+ 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+ };
+ time_t tod;
+ time_t Julian;
+ int i;
+
+ DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0)
+ ? 29 : 28;
+ if (Month < 1 || Month > 12
+ || Year < START_OF_TIME || Year > END_OF_TIME
+ || Day < 1 || Day > DaysInMonth[(int)--Month])
+ return -1;
+
+ for (Julian = Day - 1, i = 0; i < Month; i++)
+ Julian += DaysInMonth[i];
+ if (Year >= EPOCH) {
+ for (i = EPOCH; i < Year; i++)
+ Julian += 365 + (i % 4 == 0);
+ } else {
+ for (i = Year; i < EPOCH; i++)
+ Julian -= 365 + (i % 4 == 0);
+ }
+ Julian *= SECSPERDAY;
+ Julian += yyTimezone * 60L;
+ if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0)
+ return -1;
+ Julian += tod;
+ if (DSTmode == DSTon
+ || (DSTmode == DSTmaybe && TclpGetDate(&Julian, 0)->tm_isdst))
+ Julian -= 60 * 60;
+ *TimePtr = Julian;
+ return 0;
+}
+
+
+static time_t
+DSTcorrect(Start, Future)
+ time_t Start;
+ time_t Future;
+{
+ time_t StartDay;
+ time_t FutureDay;
+
+ StartDay = (TclpGetDate(&Start, 0)->tm_hour + 1) % 24;
+ FutureDay = (TclpGetDate(&Future, 0)->tm_hour + 1) % 24;
+ return (Future - Start) + (StartDay - FutureDay) * 60L * 60L;
+}
+
+
+static time_t
+RelativeDate(Start, DayOrdinal, DayNumber)
+ time_t Start;
+ time_t DayOrdinal;
+ time_t DayNumber;
+{
+ struct tm *tm;
+ time_t now;
+
+ now = Start;
+ tm = TclpGetDate(&now, 0);
+ now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7);
+ now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1);
+ return DSTcorrect(Start, now);
+}
+
+
+static int
+RelativeMonth(Start, RelMonth, TimePtr)
+ time_t Start;
+ time_t RelMonth;
+ time_t *TimePtr;
+{
+ struct tm *tm;
+ time_t Month;
+ time_t Year;
+ time_t Julian;
+ int result;
+
+ if (RelMonth == 0) {
+ *TimePtr = 0;
+ return 0;
+ }
+ tm = TclpGetDate(&Start, 0);
+ Month = 12 * (tm->tm_year + TM_YEAR_BASE) + tm->tm_mon + RelMonth;
+ Year = Month / 12;
+ Month = Month % 12 + 1;
+ result = Convert(Month, (time_t) tm->tm_mday, Year,
+ (time_t) tm->tm_hour, (time_t) tm->tm_min, (time_t) tm->tm_sec,
+ MER24, DSTmaybe, &Julian);
+ /*
+ * The following iteration takes into account the case were we jump
+ * into a "short month". Far example, "one month from Jan 31" will
+ * fail because there is no Feb 31. The code below will reduce the
+ * day and try converting the date until we succed or the date equals
+ * 28 (which always works unless the date is bad in another way).
+ */
+
+ while ((result != 0) && (tm->tm_mday > 28)) {
+ tm->tm_mday--;
+ result = Convert(Month, (time_t) tm->tm_mday, Year,
+ (time_t) tm->tm_hour, (time_t) tm->tm_min, (time_t) tm->tm_sec,
+ MER24, DSTmaybe, &Julian);
+ }
+ if (result != 0) {
+ return -1;
+ }
+ *TimePtr = DSTcorrect(Start, Julian);
+ return 0;
+}
+
+
+static int
+LookupWord(buff)
+ char *buff;
+{
+ register char *p;
+ register char *q;
+ register TABLE *tp;
+ int i;
+ int abbrev;
+
+ /*
+ * Make it lowercase.
+ */
+ for (p = buff; *p; p++) {
+ if (isupper(UCHAR(*p))) {
+ *p = (char) tolower(UCHAR(*p));
+ }
+ }
+
+ if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) {
+ yylval.Meridian = MERam;
+ return tMERIDIAN;
+ }
+ if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) {
+ yylval.Meridian = MERpm;
+ return tMERIDIAN;
+ }
+
+ /*
+ * See if we have an abbreviation for a month.
+ */
+ if (strlen(buff) == 3) {
+ abbrev = 1;
+ } else if (strlen(buff) == 4 && buff[3] == '.') {
+ abbrev = 1;
+ buff[3] = '\0';
+ } else {
+ abbrev = 0;
+ }
+
+ for (tp = MonthDayTable; tp->name; tp++) {
+ if (abbrev) {
+ if (strncmp(buff, tp->name, 3) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ } else if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+
+ for (tp = TimezoneTable; tp->name; tp++) {
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+
+ for (tp = UnitsTable; tp->name; tp++) {
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+
+ /*
+ * Strip off any plural and try the units table again.
+ */
+ i = strlen(buff) - 1;
+ if (buff[i] == 's') {
+ buff[i] = '\0';
+ for (tp = UnitsTable; tp->name; tp++) {
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+ }
+
+ for (tp = OtherTable; tp->name; tp++) {
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+
+ /*
+ * Military timezones.
+ */
+ if (buff[1] == '\0' && isalpha(UCHAR(*buff))) {
+ for (tp = MilitaryTable; tp->name; tp++) {
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+ }
+
+ /*
+ * Drop out any periods and try the timezone table again.
+ */
+ for (i = 0, p = q = buff; *q; q++)
+ if (*q != '.') {
+ *p++ = *q;
+ } else {
+ i++;
+ }
+ *p = '\0';
+ if (i) {
+ for (tp = TimezoneTable; tp->name; tp++) {
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+ }
+
+ return tID;
+}
+
+
+static int
+yylex()
+{
+ register char c;
+ register char *p;
+ char buff[20];
+ int Count;
+ int sign;
+
+ for ( ; ; ) {
+ while (isspace((unsigned char) (*yyInput))) {
+ yyInput++;
+ }
+
+ if (isdigit(c = *yyInput) || c == '-' || c == '+') {
+ if (c == '-' || c == '+') {
+ sign = c == '-' ? -1 : 1;
+ if (!isdigit(*++yyInput)) {
+ /*
+ * skip the '-' sign
+ */
+ continue;
+ }
+ } else {
+ sign = 0;
+ }
+ for (yylval.Number = 0; isdigit(c = *yyInput++); ) {
+ yylval.Number = 10 * yylval.Number + c - '0';
+ }
+ yyInput--;
+ if (sign < 0) {
+ yylval.Number = -yylval.Number;
+ }
+ return sign ? tSNUMBER : tUNUMBER;
+ }
+ if (isalpha(UCHAR(c))) {
+ for (p = buff; isalpha(c = *yyInput++) || c == '.'; ) {
+ if (p < &buff[sizeof buff - 1]) {
+ *p++ = c;
+ }
+ }
+ *p = '\0';
+ yyInput--;
+ return LookupWord(buff);
+ }
+ if (c != '(') {
+ return *yyInput++;
+ }
+ Count = 0;
+ do {
+ c = *yyInput++;
+ if (c == '\0') {
+ return c;
+ } else if (c == '(') {
+ Count++;
+ } else if (c == ')') {
+ Count--;
+ }
+ } while (Count > 0);
+ }
+}
+
+/*
+ * Specify zone is of -50000 to force GMT. (This allows BST to work).
+ */
+
+int
+TclGetDate(p, now, zone, timePtr)
+ char *p;
+ unsigned long now;
+ long zone;
+ unsigned long *timePtr;
+{
+ struct tm *tm;
+ time_t Start;
+ time_t Time;
+ time_t tod;
+ int thisyear;
+
+ yyInput = p;
+ tm = TclpGetDate((time_t *) &now, 0);
+ thisyear = tm->tm_year + TM_YEAR_BASE;
+ yyYear = thisyear;
+ yyMonth = tm->tm_mon + 1;
+ yyDay = tm->tm_mday;
+ yyTimezone = zone;
+ if (zone == -50000) {
+ yyDSTmode = DSToff; /* assume GMT */
+ yyTimezone = 0;
+ } else {
+ yyDSTmode = DSTmaybe;
+ }
+ yyHour = 0;
+ yyMinutes = 0;
+ yySeconds = 0;
+ yyMeridian = MER24;
+ yyRelSeconds = 0;
+ yyRelMonth = 0;
+ yyHaveDate = 0;
+ yyHaveDay = 0;
+ yyHaveRel = 0;
+ yyHaveTime = 0;
+ yyHaveZone = 0;
+
+ if (yyparse() || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 ||
+ yyHaveDay > 1) {
+ return -1;
+ }
+
+ if (yyHaveDate || yyHaveTime || yyHaveDay) {
+ if (TclDateYear < 0) {
+ TclDateYear = -TclDateYear;
+ }
+ /*
+ * The following line handles years that are specified using
+ * only two digits. The line of code below implements a policy
+ * defined by the X/Open workgroup on the millinium rollover.
+ * Note: some of those dates may not actually be valid on some
+ * platforms. The POSIX standard startes that the dates 70-99
+ * shall refer to 1970-1999 and 00-38 shall refer to 2000-2038.
+ * This later definition should work on all platforms.
+ */
+
+ if (TclDateYear < 100) {
+ if (TclDateYear >= 69) {
+ TclDateYear += 1900;
+ } else {
+ TclDateYear += 2000;
+ }
+ }
+ if (Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds,
+ yyMeridian, yyDSTmode, &Start) < 0) {
+ return -1;
+ }
+ } else {
+ Start = now;
+ if (!yyHaveRel) {
+ Start -= ((tm->tm_hour * 60L) + tm->tm_min * 60L) + tm->tm_sec;
+ }
+ }
+
+ Start += yyRelSeconds;
+ if (RelativeMonth(Start, yyRelMonth, &Time) < 0) {
+ return -1;
+ }
+ Start += Time;
+
+ if (yyHaveDay && !yyHaveDate) {
+ tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber);
+ Start += tod;
+ }
+
+ *timePtr = Start;
+ return 0;
+}
generated by cgit v0.12 at 2024-11-16 02:08:21 (GMT)