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-rw-r--r--unix/tclUnixTime.c156
1 files changed, 136 insertions, 20 deletions
diff --git a/unix/tclUnixTime.c b/unix/tclUnixTime.c
index 926e8f4..b98f2e1 100644
--- a/unix/tclUnixTime.c
+++ b/unix/tclUnixTime.c
@@ -112,7 +112,7 @@ TclpGetClicks(void)
if (tclGetTimeProcPtr != NativeGetTime) {
Tcl_Time time;
- tclGetTimeProcPtr(&time, tclTimeClientData);
+ (*tclGetTimeProcPtr) (&time, tclTimeClientData);
now = time.sec*1000000 + time.usec;
} else {
/*
@@ -125,7 +125,7 @@ TclpGetClicks(void)
#else
Tcl_Time time;
- tclGetTimeProcPtr(&time, tclTimeClientData);
+ (*tclGetTimeProcPtr) (&time, tclTimeClientData);
now = time.sec*1000000 + time.usec;
#endif
@@ -134,7 +134,7 @@ TclpGetClicks(void)
#ifdef TCL_WIDE_CLICKS
/*
- *----------------------------------------------------------------------
+ *-----------------------------------------------------------------------------
*
* TclpGetWideClicks --
*
@@ -149,7 +149,7 @@ TclpGetClicks(void)
* Side effects:
* None.
*
- *----------------------------------------------------------------------
+ *-----------------------------------------------------------------------------
*/
Tcl_WideInt
@@ -160,7 +160,7 @@ TclpGetWideClicks(void)
if (tclGetTimeProcPtr != NativeGetTime) {
Tcl_Time time;
- tclGetTimeProcPtr(&time, tclTimeClientData);
+ (*tclGetTimeProcPtr) (&time, tclTimeClientData);
now = (Tcl_WideInt) (time.sec*1000000 + time.usec);
} else {
#ifdef MAC_OSX_TCL
@@ -174,7 +174,7 @@ TclpGetWideClicks(void)
}
/*
- *----------------------------------------------------------------------
+ *-----------------------------------------------------------------------------
*
* TclpWideClicksToNanoseconds --
*
@@ -187,7 +187,7 @@ TclpGetWideClicks(void)
* Side effects:
* None.
*
- *----------------------------------------------------------------------
+ *-----------------------------------------------------------------------------
*/
double
@@ -224,6 +224,122 @@ TclpWideClicksToNanoseconds(
/*
*----------------------------------------------------------------------
*
+ * TclpGetTimeZone --
+ *
+ * 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).
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclpGetTimeZone(
+ 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.
+ */
+
+#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);
+
+ timeZone = timeDataPtr->tm_tzadj / 60;
+ if (timeDataPtr->tm_isdst) {
+ timeZone += 60;
+ }
+#endif
+
+#if defined(HAVE_TM_GMTOFF) && !defined (TCL_GOT_TIMEZONE)
+#define TCL_GOT_TIMEZONE
+ /*
+ * Struct tm contains tm_gmtoff - that value may be used.
+ */
+
+ time_t curTime = (time_t) currentTime;
+ struct tm *timeDataPtr = TclpLocaltime(&curTime);
+
+ timeZone = -(timeDataPtr->tm_gmtoff / 60);
+ if (timeDataPtr->tm_isdst) {
+ timeZone += 60;
+ }
+#endif
+
+#if defined(HAVE_TIMEZONE_VAR) && !defined(TCL_GOT_TIMEZONE) && !defined(USE_DELTA_FOR_TZ)
+#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.
+ */
+
+ timeZone = timezone / 60;
+#endif
+
+#if !defined(TCL_GOT_TIMEZONE)
+#define TCL_GOT_TIMEZONE
+ /*
+ * Fallback - determine time zone with a known reference time.
+ */
+
+ 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.
+ */
+
+ timeZone = (12 - stm->tm_hour)*60 + (0 - stm->tm_min);
+ if (stm->tm_isdst) {
+ timeZone += 60;
+ }
+
+ /*
+ * Now have offset for our known reference time, eg +360 for CST6CDT.
+ */
+#endif
+
+#ifndef TCL_GOT_TIMEZONE
+ /*
+ * Cause fatal compile error, we don't know how to get timezone.
+ */
+
+#error autoconf did not figure out how to determine the timezone.
+#endif
+
+ return timeZone;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
* Tcl_GetTime --
*
* Gets the current system time in seconds and microseconds since the
@@ -245,7 +361,7 @@ void
Tcl_GetTime(
Tcl_Time *timePtr) /* Location to store time information. */
{
- tclGetTimeProcPtr(timePtr, tclTimeClientData);
+ (*tclGetTimeProcPtr) (timePtr, tclTimeClientData);
}
/*
@@ -268,7 +384,7 @@ Tcl_GetTime(
struct tm *
TclpGetDate(
- const time_t *time,
+ CONST time_t *time,
int useGMT)
{
if (useGMT) {
@@ -296,7 +412,7 @@ TclpGetDate(
struct tm *
TclpGmtime(
- const time_t *timePtr) /* Pointer to the number of seconds since the
+ CONST time_t *timePtr) /* Pointer to the number of seconds since the
* local system's epoch */
{
/*
@@ -306,14 +422,14 @@ TclpGmtime(
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(&tsdPtr->gmtime_buf, gmtime(timePtr), sizeof(struct tm));
+ memcpy(&(tsdPtr->gmtime_buf), gmtime(timePtr), sizeof(struct tm));
Tcl_MutexUnlock(&tmMutex);
#endif
- return &tsdPtr->gmtime_buf;
+ return &(tsdPtr->gmtime_buf);
}
/*
@@ -335,7 +451,7 @@ TclpGmtime(
struct tm *
TclpLocaltime(
- const time_t *timePtr) /* Pointer to the number of seconds since the
+ CONST time_t *timePtr) /* Pointer to the number of seconds since the
* local system's epoch */
{
/*
@@ -346,14 +462,14 @@ TclpLocaltime(
SetTZIfNecessary();
#ifdef HAVE_LOCALTIME_R
- localtime_r(timePtr, &tsdPtr->localtime_buf);
+ localtime_r(timePtr, &(tsdPtr->localtime_buf));
#else
Tcl_MutexLock(&tmMutex);
- memcpy(&tsdPtr->localtime_buf, localtime(timePtr), sizeof(struct tm));
+ memcpy(&(tsdPtr->localtime_buf), localtime(timePtr), sizeof(struct tm));
Tcl_MutexUnlock(&tmMutex);
#endif
- return &tsdPtr->localtime_buf;
+ return &(tsdPtr->localtime_buf);
}
/*
@@ -492,7 +608,7 @@ NativeGetTime(
static void
SetTZIfNecessary(void)
{
- const char *newTZ = getenv("TZ");
+ CONST char *newTZ = getenv("TZ");
Tcl_MutexLock(&tmMutex);
if (newTZ == NULL) {
@@ -501,9 +617,9 @@ SetTZIfNecessary(void)
if (lastTZ == NULL || strcmp(lastTZ, newTZ)) {
tzset();
if (lastTZ == NULL) {
- Tcl_CreateExitHandler(CleanupMemory, NULL);
+ Tcl_CreateExitHandler(CleanupMemory, (ClientData) NULL);
} else {
- ckfree(lastTZ);
+ Tcl_Free(lastTZ);
}
lastTZ = ckalloc(strlen(newTZ) + 1);
strcpy(lastTZ, newTZ);
generated by cgit v0.12 at 2024-10-31 16:26:06 (GMT)