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-rw-r--r--unix/tclUnixTime.c370
1 files changed, 190 insertions, 180 deletions
diff --git a/unix/tclUnixTime.c b/unix/tclUnixTime.c
index e51f3fe..1ebec63 100644
--- a/unix/tclUnixTime.c
+++ b/unix/tclUnixTime.c
@@ -1,26 +1,26 @@
-/*
+/*
* tclUnixTime.c --
*
- * Contains Unix specific versions of Tcl functions that
- * obtain time values from the operating system.
+ * Contains Unix specific versions of Tcl functions that obtain time
+ * values from the operating system.
*
* Copyright (c) 1995 Sun Microsystems, Inc.
*
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclUnixTime.c,v 1.24 2005/05/10 18:35:29 kennykb Exp $
+ * RCS: @(#) $Id: tclUnixTime.c,v 1.25 2005/07/20 23:16:01 dkf Exp $
*/
#include "tclInt.h"
#include <locale.h>
#define TM_YEAR_BASE 1900
-#define IsLeapYear(x) ((x % 4 == 0) && (x % 100 != 0 || x % 400 == 0))
+#define IsLeapYear(x) (((x)%4 == 0) && ((x)%100 != 0 || (x)%400 == 0))
/*
- * TclpGetDate is coded to return a pointer to a 'struct tm'. For
- * thread safety, this structure must be in thread-specific data.
- * The 'tmKey' variable is the key to this buffer.
+ * TclpGetDate is coded to return a pointer to a 'struct tm'. For thread
+ * safety, this structure must be in thread-specific data. The 'tmKey'
+ * variable is the key to this buffer.
*/
static Tcl_ThreadDataKey tmKey;
@@ -30,40 +30,42 @@ typedef struct ThreadSpecificData {
} ThreadSpecificData;
/*
- * If we fall back on the thread-unsafe versions of gmtime and localtime,
- * use this mutex to try to protect them.
+ * If we fall back on the thread-unsafe versions of gmtime and localtime, use
+ * this mutex to try to protect them.
*/
TCL_DECLARE_MUTEX(tmMutex)
-static char* lastTZ = NULL; /* Holds the last setting of the
- * TZ environment variable, or an
- * empty string if the variable was
- * not set. */
-
-/* Static functions declared in this file */
+static char *lastTZ = NULL; /* Holds the last setting of the TZ
+ * environment variable, or an empty string if
+ * the variable was not set. */
-static void SetTZIfNecessary _ANSI_ARGS_((void));
-static void CleanupMemory _ANSI_ARGS_((ClientData));
+/*
+ * Static functions declared in this file.
+ */
-static void NativeScaleTime _ANSI_ARGS_ ((Tcl_Time* timebuf, ClientData clientData));
-static void NativeGetTime _ANSI_ARGS_ ((Tcl_Time* timebuf, ClientData clientData));
+static void SetTZIfNecessary _ANSI_ARGS_((void));
+static void CleanupMemory _ANSI_ARGS_((ClientData));
+static void NativeScaleTime _ANSI_ARGS_((Tcl_Time *timebuf,
+ ClientData clientData));
+static void NativeGetTime _ANSI_ARGS_((Tcl_Time *timebuf,
+ ClientData clientData));
-/* TIP #233 (Virtualized Time)
- * Data for the time hooks, if any.
+/*
+ * TIP #233 (Virtualized Time): Data for the time hooks, if any.
*/
-Tcl_GetTimeProc* tclGetTimeProcPtr = NativeGetTime;
-Tcl_ScaleTimeProc* tclScaleTimeProcPtr = NativeScaleTime;
-ClientData tclTimeClientData = NULL;
+Tcl_GetTimeProc *tclGetTimeProcPtr = NativeGetTime;
+Tcl_ScaleTimeProc *tclScaleTimeProcPtr = NativeScaleTime;
+ClientData tclTimeClientData = NULL;
/*
*-----------------------------------------------------------------------------
*
* TclpGetSeconds --
*
- * This procedure returns the number of seconds from the epoch. On
- * most Unix systems the epoch is Midnight Jan 1, 1970 GMT.
+ * This procedure returns the number of seconds from the epoch. On most
+ * Unix systems the epoch is Midnight Jan 1, 1970 GMT.
*
* Results:
* Number of seconds from the epoch.
@@ -86,8 +88,8 @@ TclpGetSeconds()
* TclpGetClicks --
*
* This procedure returns a value that represents the highest resolution
- * clock available on the system. There are no garantees on what the
- * resolution will be. In Tcl we will call this value a "click". The
+ * clock available on the system. There are no garantees on what the
+ * resolution will be. In Tcl we will call this value a "click". The
* start time is also system dependant.
*
* Results:
@@ -106,13 +108,17 @@ TclpGetClicks()
#ifdef NO_GETTOD
if (tclGetTimeProcPtr != NativeGetTime) {
- Tcl_Time time;
- (*tclGetTimeProcPtr) (&time, tclTimeClientData);
+ Tcl_Time time;
+
+ (*tclGetTimeProcPtr) (&time, tclTimeClientData);
now = time.sec*1000000 + time.usec;
} else {
- /* A semi-NativeGetTime, specialized to clicks */
- struct tms dummy;
- now = (unsigned long) times(&dummy);
+ /*
+ * A semi-NativeGetTime, specialized to clicks.
+ */
+ struct tms dummy;
+
+ now = (unsigned long) times(&dummy);
}
#else
Tcl_Time time;
@@ -129,13 +135,12 @@ TclpGetClicks()
*
* TclpGetTimeZone --
*
- * Determines the current timezone. The method varies wildly
- * between different platform implementations, so its hidden in
- * this function.
+ * Determines the current timezone. The method varies wildly between
+ * different platform implementations, so its hidden in this function.
*
* Results:
- * The return value is the local time zone, measured in
- * minutes away from GMT (-ve for east, +ve for west).
+ * The return value is the local time zone, measured in minutes away from
+ * GMT (-ve for east, +ve for west).
*
* Side effects:
* None.
@@ -144,102 +149,101 @@ TclpGetClicks()
*/
int
-TclpGetTimeZone (currentTime)
- unsigned long currentTime;
+TclpGetTimeZone(currentTime)
+ unsigned long currentTime;
{
+ int timeZone;
+
/*
- * We prefer first to use the time zone in "struct tm" if the
- * structure contains such a member. Following that, we try
- * to locate the external 'timezone' variable and use its value.
- * If both of those methods fail, we attempt to convert a known
- * time to local time and use the difference from UTC as the local
- * time zone. In all cases, we need to undo any Daylight Saving Time
- * adjustment.
+ * We prefer first to use the time zone in "struct tm" if the structure
+ * contains such a member. Following that, we try to locate the external
+ * 'timezone' variable and use its value. If both of those methods fail,
+ * we attempt to convert a known time to local time and use the difference
+ * from UTC as the local time zone. In all cases, we need to undo any
+ * Daylight Saving Time adjustment.
*/
-
-#if defined(HAVE_TM_TZADJ)
-# define TCL_GOT_TIMEZONE
- /* Struct tm contains tm_tzadj - that value may be used. */
+#if defined(HAVE_TM_TZADJ)
+#define TCL_GOT_TIMEZONE
+ /*
+ * Struct tm contains tm_tzadj - that value may be used.
+ */
- time_t curTime = (time_t) currentTime;
- struct tm *timeDataPtr = TclpLocaltime(&curTime);
- int timeZone;
+ time_t curTime = (time_t) currentTime;
+ struct tm *timeDataPtr = TclpLocaltime(&curTime);
timeZone = timeDataPtr->tm_tzadj / 60;
if (timeDataPtr->tm_isdst) {
- timeZone += 60;
+ timeZone += 60;
}
-
- return timeZone;
-
#endif
#if defined(HAVE_TM_GMTOFF) && !defined (TCL_GOT_TIMEZONE)
-# define TCL_GOT_TIMEZONE
-
- /* Struct tm contains tm_gmtoff - that value may be used. */
+#define TCL_GOT_TIMEZONE
+ /*
+ * Struct tm contains tm_gmtoff - that value may be used.
+ */
- time_t curTime = (time_t) currentTime;
+ time_t curTime = (time_t) currentTime;
struct tm *timeDataPtr = TclpLocaltime(&curTime);
- int timeZone;
timeZone = -(timeDataPtr->tm_gmtoff / 60);
if (timeDataPtr->tm_isdst) {
- timeZone += 60;
+ timeZone += 60;
}
-
- return timeZone;
-
#endif
#if defined(HAVE_TIMEZONE_VAR) && !defined(TCL_GOT_TIMEZONE) && !defined(USE_DELTA_FOR_TZ)
-# define TCL_GOT_TIMEZONE
-
- int timeZone;
-
- /* The 'timezone' external var is present and may be used. */
+#define TCL_GOT_TIMEZONE
+ /*
+ * The 'timezone' external var is present and may be used.
+ */
SetTZIfNecessary();
/*
- * Note: this is not a typo in "timezone" below! See tzset
- * documentation for details.
+ * Note: this is not a typo in "timezone" below! See tzset documentation
+ * for details.
*/
timeZone = timezone / 60;
- return timeZone;
-
#endif
-#if !defined(TCL_GOT_TIMEZONE)
-#define TCL_GOT_TIMEZONE 1
+#if !defined(TCL_GOT_TIMEZONE)
+#define TCL_GOT_TIMEZONE
/*
* Fallback - determine time zone with a known reference time.
*/
- int timeZone;
time_t tt;
struct tm *stm;
- tt = 849268800L; /* 1996-11-29 12:00:00 GMT */
- stm = TclpLocaltime(&tt); /* eg 1996-11-29 6:00:00 CST6CDT */
- /* The calculation below assumes a max of +12 or -12 hours from GMT */
+
+ tt = 849268800L; /* 1996-11-29 12:00:00 GMT */
+ stm = TclpLocaltime(&tt); /* eg 1996-11-29 6:00:00 CST6CDT */
+
+ /*
+ * The calculation below assumes a max of +12 or -12 hours from GMT.
+ */
+
timeZone = (12 - stm->tm_hour)*60 + (0 - stm->tm_min);
- if ( stm -> tm_isdst ) {
+ if (stm->tm_isdst) {
timeZone += 60;
}
- return timeZone; /* eg +360 for CST6CDT */
+
+ /*
+ * Now have offset for our known reference time, eg +360 for CST6CDT.
+ */
#endif
#ifndef TCL_GOT_TIMEZONE
/*
- * Cause compile error, we don't know how to get timezone.
+ * Cause fatal compile error, we don't know how to get timezone.
*/
-#error autoconf did not figure out how to determine the timezone.
-
+#error autoconf did not figure out how to determine the timezone.
#endif
+ return timeZone;
}
/*
@@ -247,11 +251,11 @@ TclpGetTimeZone (currentTime)
*
* Tcl_GetTime --
*
- * 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 seconds and microseconds since the
+ * beginning of the epoch: 00:00 UCT, January 1, 1970.
*
- * This function is hooked, allowing users to specify their
- * own virtual system time.
+ * This function is hooked, allowing users to specify their own virtual
+ * system time.
*
* Results:
* Returns the current time in timePtr.
@@ -274,9 +278,9 @@ Tcl_GetTime(timePtr)
*
* TclpGetDate --
*
- * This function converts between seconds and struct tm. If
- * useGMT is true, then the returned date will be in Greenwich
- * Mean Time (GMT). Otherwise, it will be in the local time zone.
+ * This function converts between seconds and struct tm. If useGMT is
+ * true, then the returned date will be in Greenwich Mean Time (GMT).
+ * Otherwise, it will be in the local time zone.
*
* Results:
* Returns a static tm structure.
@@ -317,35 +321,37 @@ TclpGetDate(time, useGMT)
*/
struct tm *
-TclpGmtime( timePtr )
- CONST time_t *timePtr; /* Pointer to the number of seconds
- * since the local system's epoch */
-
+TclpGmtime(timePtr)
+ CONST time_t *timePtr; /* Pointer to the number of seconds since the
+ * local system's epoch */
{
/*
* Get a thread-local buffer to hold the returned time.
*/
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT( &tmKey );
+ ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tmKey);
+
#ifdef HAVE_GMTIME_R
- gmtime_r(timePtr, &( tsdPtr->gmtime_buf ));
+ gmtime_r(timePtr, &(tsdPtr->gmtime_buf));
#else
- Tcl_MutexLock( &tmMutex );
- memcpy( (VOID *) &( tsdPtr->gmtime_buf ),
- (VOID *) gmtime( timePtr ),
- sizeof( struct tm ) );
- Tcl_MutexUnlock( &tmMutex );
-#endif
- return &( tsdPtr->gmtime_buf );
+ Tcl_MutexLock(&tmMutex);
+ memcpy((VOID *) &(tsdPtr->gmtime_buf), (VOID *) gmtime(timePtr),
+ sizeof(struct tm));
+ Tcl_MutexUnlock(&tmMutex);
+#endif
+
+ return &(tsdPtr->gmtime_buf);
}
+
/*
* Forwarder for obsolete item in Stubs
*/
+
struct tm*
-TclpGmtime_unix( timePtr )
- CONST time_t* timePtr;
+TclpGmtime_unix(timePtr)
+ CONST time_t *timePtr;
{
- return TclpGmtime( timePtr );
+ return TclpGmtime(timePtr);
}
/*
@@ -367,35 +373,35 @@ TclpGmtime_unix( timePtr )
struct tm *
TclpLocaltime(timePtr)
- CONST time_t *timePtr; /* Pointer to the number of seconds
- * since the local system's epoch */
-
+ CONST time_t *timePtr; /* Pointer to the number of seconds since the
+ * local system's epoch */
{
/*
* Get a thread-local buffer to hold the returned time.
*/
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT( &tmKey );
+ ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tmKey);
+
SetTZIfNecessary();
#ifdef HAVE_LOCALTIME_R
- localtime_r( timePtr, &( tsdPtr->localtime_buf ) );
+ localtime_r(timePtr, &(tsdPtr->localtime_buf));
#else
- Tcl_MutexLock( &tmMutex );
- memcpy( (VOID *) &( tsdPtr -> localtime_buf ),
- (VOID *) localtime( timePtr ),
- sizeof( struct tm ) );
- Tcl_MutexUnlock( &tmMutex );
-#endif
- return &( tsdPtr->localtime_buf );
+ Tcl_MutexLock(&tmMutex);
+ memcpy((VOID *) &(tsdPtr->localtime_buf), (VOID *) localtime(timePtr),
+ sizeof(struct tm));
+ Tcl_MutexUnlock(&tmMutex);
+#endif
+
+ return &(tsdPtr->localtime_buf);
}
/*
* Forwarder for obsolete item in Stubs
*/
struct tm*
-TclpLocaltime_unix( timePtr )
- CONST time_t* timePtr;
+TclpLocaltime_unix(timePtr)
+ CONST time_t *timePtr;
{
- return TclpLocaltime( timePtr );
+ return TclpLocaltime(timePtr);
}
/*
@@ -403,9 +409,8 @@ TclpLocaltime_unix( timePtr )
*
* Tcl_SetTimeProc --
*
- * TIP #233 (Virtualized Time)
- * Registers two handlers for the virtualization of Tcl's
- * access to time information.
+ * TIP #233 (Virtualized Time): Registers two handlers for the
+ * virtualization of Tcl's access to time information.
*
* Results:
* None.
@@ -417,14 +422,14 @@ TclpLocaltime_unix( timePtr )
*/
void
-Tcl_SetTimeProc (getProc, scaleProc, clientData)
- Tcl_GetTimeProc* getProc;
- Tcl_ScaleTimeProc* scaleProc;
- ClientData clientData;
+Tcl_SetTimeProc(getProc, scaleProc, clientData)
+ Tcl_GetTimeProc *getProc;
+ Tcl_ScaleTimeProc *scaleProc;
+ ClientData clientData;
{
- tclGetTimeProcPtr = getProc;
+ tclGetTimeProcPtr = getProc;
tclScaleTimeProcPtr = scaleProc;
- tclTimeClientData = clientData;
+ tclTimeClientData = clientData;
}
/*
@@ -432,8 +437,7 @@ Tcl_SetTimeProc (getProc, scaleProc, clientData)
*
* Tcl_QueryTimeProc --
*
- * TIP #233 (Virtualized Time)
- * Query which time handlers are registered.
+ * TIP #233 (Virtualized Time): Query which time handlers are registered.
*
* Results:
* None.
@@ -445,19 +449,19 @@ Tcl_SetTimeProc (getProc, scaleProc, clientData)
*/
void
-Tcl_QueryTimeProc (getProc, scaleProc, clientData)
- Tcl_GetTimeProc** getProc;
- Tcl_ScaleTimeProc** scaleProc;
- ClientData* clientData;
+Tcl_QueryTimeProc(getProc, scaleProc, clientData)
+ Tcl_GetTimeProc **getProc;
+ Tcl_ScaleTimeProc **scaleProc;
+ ClientData *clientData;
{
if (getProc) {
- *getProc = tclGetTimeProcPtr;
+ *getProc = tclGetTimeProcPtr;
}
if (scaleProc) {
- *scaleProc = tclScaleTimeProcPtr;
+ *scaleProc = tclScaleTimeProcPtr;
}
if (clientData) {
- *clientData = tclTimeClientData;
+ *clientData = tclTimeClientData;
}
}
@@ -466,9 +470,8 @@ Tcl_QueryTimeProc (getProc, scaleProc, clientData)
*
* NativeScaleTime --
*
- * TIP #233
- * Scale from virtual time to the real-time. For native scaling the
- * relationship is 1:1 and nothing has to be done.
+ * TIP #233: Scale from virtual time to the real-time. For native scaling
+ * the relationship is 1:1 and nothing has to be done.
*
* Results:
* Scales the time in timePtr.
@@ -480,11 +483,11 @@ Tcl_QueryTimeProc (getProc, scaleProc, clientData)
*/
static void
-NativeScaleTime (timePtr, clientData)
- Tcl_Time* timePtr;
- ClientData clientData;
+NativeScaleTime(timePtr, clientData)
+ Tcl_Time *timePtr;
+ ClientData clientData;
{
- /* Native scale is 1:1. Nothing is done */
+ /* Native scale is 1:1. Nothing is done */
}
/*
@@ -492,8 +495,7 @@ NativeScaleTime (timePtr, clientData)
*
* NativeGetTime --
*
- * TIP #233
- * Gets the current system time in seconds and microseconds
+ * TIP #233: Gets the current system time in seconds and microseconds
* since the beginning of the epoch: 00:00 UCT, January 1, 1970.
*
* Results:
@@ -506,15 +508,15 @@ NativeScaleTime (timePtr, clientData)
*/
static void
-NativeGetTime (timePtr, clientData)
- Tcl_Time* timePtr;
- ClientData clientData;
+NativeGetTime(timePtr, clientData)
+ Tcl_Time *timePtr;
+ ClientData clientData;
{
struct timeval tv;
struct timezone tz;
(void) gettimeofday(&tv, &tz);
- timePtr->sec = tv.tv_sec;
+ timePtr->sec = tv.tv_sec;
timePtr->usec = tv.tv_usec;
}
/*
@@ -522,49 +524,49 @@ NativeGetTime (timePtr, clientData)
*
* SetTZIfNecessary --
*
- * Determines whether a call to 'tzset' is needed prior to the
- * next call to 'localtime' or examination of the 'timezone' variable.
+ * Determines whether a call to 'tzset' is needed prior to the next call
+ * to 'localtime' or examination of the 'timezone' variable.
*
* Results:
* None.
*
* Side effects:
- * If 'tzset' has never been called in the current process, or if
- * the value of the environment variable TZ has changed since the
- * last call to 'tzset', then 'tzset' is called again.
+ * If 'tzset' has never been called in the current process, or if the
+ * value of the environment variable TZ has changed since the last call
+ * to 'tzset', then 'tzset' is called again.
*
*----------------------------------------------------------------------
*/
static void
-SetTZIfNecessary() {
+SetTZIfNecessary()
+{
+ CONST char *newTZ = getenv("TZ");
- CONST char* newTZ = getenv( "TZ" );
Tcl_MutexLock(&tmMutex);
- if ( newTZ == NULL ) {
+ if (newTZ == NULL) {
newTZ = "";
}
- if ( lastTZ == NULL || strcmp( lastTZ, newTZ ) ) {
- tzset();
- if ( lastTZ == NULL ) {
- Tcl_CreateExitHandler( CleanupMemory, (ClientData) NULL );
+ if (lastTZ == NULL || strcmp(lastTZ, newTZ)) {
+ tzset();
+ if (lastTZ == NULL) {
+ Tcl_CreateExitHandler(CleanupMemory, (ClientData) NULL);
} else {
- Tcl_Free( lastTZ );
+ Tcl_Free(lastTZ);
}
- lastTZ = Tcl_Alloc( strlen( newTZ ) + 1 );
- strcpy( lastTZ, newTZ );
+ lastTZ = Tcl_Alloc(strlen(newTZ) + 1);
+ strcpy(lastTZ, newTZ);
}
Tcl_MutexUnlock(&tmMutex);
-
}
-
+
/*
*----------------------------------------------------------------------
*
* CleanupMemory --
*
- * Releases the private copy of the TZ environment variable
- * upon exit from Tcl.
+ * Releases the private copy of the TZ environment variable upon exit
+ * from Tcl.
*
* Results:
* None.
@@ -576,7 +578,15 @@ SetTZIfNecessary() {
*/
static void
-CleanupMemory( ClientData ignored )
+CleanupMemory(ClientData ignored)
{
- Tcl_Free( lastTZ );
+ Tcl_Free(lastTZ);
}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
generated by cgit v0.12 at 2024-11-27 20:38:17 (GMT)