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Unified Diff: nspr/pr/src/misc/prtime.c

Issue 2078763002: Delete bundled copy of NSS and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/nss@master
Patch Set: Delete bundled copy of NSS and replace with README. Created 4 years, 6 months ago
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Index: nspr/pr/src/misc/prtime.c
diff --git a/nspr/pr/src/misc/prtime.c b/nspr/pr/src/misc/prtime.c
deleted file mode 100644
index 6735805d81fe98753589d54f8720cd7f1aef7700..0000000000000000000000000000000000000000
--- a/nspr/pr/src/misc/prtime.c
+++ /dev/null
@@ -1,2012 +0,0 @@
-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/*
- * prtime.c --
- *
- * NSPR date and time functions
- *
- */
-
-#include "prinit.h"
-#include "prtime.h"
-#include "prlock.h"
-#include "prprf.h"
-#include "prlog.h"
-
-#include <string.h>
-#include <ctype.h>
-#include <errno.h> /* for EINVAL */
-#include <time.h>
-
-/*
- * The COUNT_LEAPS macro counts the number of leap years passed by
- * till the start of the given year Y. At the start of the year 4
- * A.D. the number of leap years passed by is 0, while at the start of
- * the year 5 A.D. this count is 1. The number of years divisible by
- * 100 but not divisible by 400 (the non-leap years) is deducted from
- * the count to get the correct number of leap years.
- *
- * The COUNT_DAYS macro counts the number of days since 01/01/01 till the
- * start of the given year Y. The number of days at the start of the year
- * 1 is 0 while the number of days at the start of the year 2 is 365
- * (which is ((2)-1) * 365) and so on. The reference point is 01/01/01
- * midnight 00:00:00.
- */
-
-#define COUNT_LEAPS(Y) ( ((Y)-1)/4 - ((Y)-1)/100 + ((Y)-1)/400 )
-#define COUNT_DAYS(Y) ( ((Y)-1)*365 + COUNT_LEAPS(Y) )
-#define DAYS_BETWEEN_YEARS(A, B) (COUNT_DAYS(B) - COUNT_DAYS(A))
-
-/*
- * Static variables used by functions in this file
- */
-
-/*
- * The following array contains the day of year for the last day of
- * each month, where index 1 is January, and day 0 is January 1.
- */
-
-static const int lastDayOfMonth[2][13] = {
- {-1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364},
- {-1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}
-};
-
-/*
- * The number of days in a month
- */
-
-static const PRInt8 nDays[2][12] = {
- {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
- {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
-};
-
-/*
- * Declarations for internal functions defined later in this file.
- */
-
-static void ComputeGMT(PRTime time, PRExplodedTime *gmt);
-static int IsLeapYear(PRInt16 year);
-static void ApplySecOffset(PRExplodedTime *time, PRInt32 secOffset);
-
-/*
- *------------------------------------------------------------------------
- *
- * ComputeGMT --
- *
- * Caveats:
- * - we ignore leap seconds
- *
- *------------------------------------------------------------------------
- */
-
-static void
-ComputeGMT(PRTime time, PRExplodedTime *gmt)
-{
- PRInt32 tmp, rem;
- PRInt32 numDays;
- PRInt64 numDays64, rem64;
- int isLeap;
- PRInt64 sec;
- PRInt64 usec;
- PRInt64 usecPerSec;
- PRInt64 secPerDay;
-
- /*
- * We first do the usec, sec, min, hour thing so that we do not
- * have to do LL arithmetic.
- */
-
- LL_I2L(usecPerSec, 1000000L);
- LL_DIV(sec, time, usecPerSec);
- LL_MOD(usec, time, usecPerSec);
- LL_L2I(gmt->tm_usec, usec);
- /* Correct for weird mod semantics so the remainder is always positive */
- if (gmt->tm_usec < 0) {
- PRInt64 one;
-
- LL_I2L(one, 1L);
- LL_SUB(sec, sec, one);
- gmt->tm_usec += 1000000L;
- }
-
- LL_I2L(secPerDay, 86400L);
- LL_DIV(numDays64, sec, secPerDay);
- LL_MOD(rem64, sec, secPerDay);
- /* We are sure both of these numbers can fit into PRInt32 */
- LL_L2I(numDays, numDays64);
- LL_L2I(rem, rem64);
- if (rem < 0) {
- numDays--;
- rem += 86400L;
- }
-
- /* Compute day of week. Epoch started on a Thursday. */
-
- gmt->tm_wday = (numDays + 4) % 7;
- if (gmt->tm_wday < 0) {
- gmt->tm_wday += 7;
- }
-
- /* Compute the time of day. */
-
- gmt->tm_hour = rem / 3600;
- rem %= 3600;
- gmt->tm_min = rem / 60;
- gmt->tm_sec = rem % 60;
-
- /*
- * Compute the year by finding the 400 year period, then working
- * down from there.
- *
- * Since numDays is originally the number of days since January 1, 1970,
- * we must change it to be the number of days from January 1, 0001.
- */
-
- numDays += 719162; /* 719162 = days from year 1 up to 1970 */
- tmp = numDays / 146097; /* 146097 = days in 400 years */
- rem = numDays % 146097;
- gmt->tm_year = tmp * 400 + 1;
-
- /* Compute the 100 year period. */
-
- tmp = rem / 36524; /* 36524 = days in 100 years */
- rem %= 36524;
- if (tmp == 4) { /* the 400th year is a leap year */
- tmp = 3;
- rem = 36524;
- }
- gmt->tm_year += tmp * 100;
-
- /* Compute the 4 year period. */
-
- tmp = rem / 1461; /* 1461 = days in 4 years */
- rem %= 1461;
- gmt->tm_year += tmp * 4;
-
- /* Compute which year in the 4. */
-
- tmp = rem / 365;
- rem %= 365;
- if (tmp == 4) { /* the 4th year is a leap year */
- tmp = 3;
- rem = 365;
- }
-
- gmt->tm_year += tmp;
- gmt->tm_yday = rem;
- isLeap = IsLeapYear(gmt->tm_year);
-
- /* Compute the month and day of month. */
-
- for (tmp = 1; lastDayOfMonth[isLeap][tmp] < gmt->tm_yday; tmp++) {
- }
- gmt->tm_month = --tmp;
- gmt->tm_mday = gmt->tm_yday - lastDayOfMonth[isLeap][tmp];
-
- gmt->tm_params.tp_gmt_offset = 0;
- gmt->tm_params.tp_dst_offset = 0;
-}
-
-
-/*
- *------------------------------------------------------------------------
- *
- * PR_ExplodeTime --
- *
- * Cf. struct tm *gmtime(const time_t *tp) and
- * struct tm *localtime(const time_t *tp)
- *
- *------------------------------------------------------------------------
- */
-
-PR_IMPLEMENT(void)
-PR_ExplodeTime(
- PRTime usecs,
- PRTimeParamFn params,
- PRExplodedTime *exploded)
-{
- ComputeGMT(usecs, exploded);
- exploded->tm_params = params(exploded);
- ApplySecOffset(exploded, exploded->tm_params.tp_gmt_offset
- + exploded->tm_params.tp_dst_offset);
-}
-
-
-/*
- *------------------------------------------------------------------------
- *
- * PR_ImplodeTime --
- *
- * Cf. time_t mktime(struct tm *tp)
- * Note that 1 year has < 2^25 seconds. So an PRInt32 is large enough.
- *
- *------------------------------------------------------------------------
- */
-PR_IMPLEMENT(PRTime)
-PR_ImplodeTime(const PRExplodedTime *exploded)
-{
- PRExplodedTime copy;
- PRTime retVal;
- PRInt64 secPerDay, usecPerSec;
- PRInt64 temp;
- PRInt64 numSecs64;
- PRInt32 numDays;
- PRInt32 numSecs;
-
- /* Normalize first. Do this on our copy */
- copy = *exploded;
- PR_NormalizeTime(&copy, PR_GMTParameters);
-
- numDays = DAYS_BETWEEN_YEARS(1970, copy.tm_year);
-
- numSecs = copy.tm_yday * 86400 + copy.tm_hour * 3600
- + copy.tm_min * 60 + copy.tm_sec;
-
- LL_I2L(temp, numDays);
- LL_I2L(secPerDay, 86400);
- LL_MUL(temp, temp, secPerDay);
- LL_I2L(numSecs64, numSecs);
- LL_ADD(numSecs64, numSecs64, temp);
-
- /* apply the GMT and DST offsets */
- LL_I2L(temp, copy.tm_params.tp_gmt_offset);
- LL_SUB(numSecs64, numSecs64, temp);
- LL_I2L(temp, copy.tm_params.tp_dst_offset);
- LL_SUB(numSecs64, numSecs64, temp);
-
- LL_I2L(usecPerSec, 1000000L);
- LL_MUL(temp, numSecs64, usecPerSec);
- LL_I2L(retVal, copy.tm_usec);
- LL_ADD(retVal, retVal, temp);
-
- return retVal;
-}
-
-/*
- *-------------------------------------------------------------------------
- *
- * IsLeapYear --
- *
- * Returns 1 if the year is a leap year, 0 otherwise.
- *
- *-------------------------------------------------------------------------
- */
-
-static int IsLeapYear(PRInt16 year)
-{
- if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
- return 1;
- else
- return 0;
-}
-
-/*
- * 'secOffset' should be less than 86400 (i.e., a day).
- * 'time' should point to a normalized PRExplodedTime.
- */
-
-static void
-ApplySecOffset(PRExplodedTime *time, PRInt32 secOffset)
-{
- time->tm_sec += secOffset;
-
- /* Note that in this implementation we do not count leap seconds */
- if (time->tm_sec < 0 || time->tm_sec >= 60) {
- time->tm_min += time->tm_sec / 60;
- time->tm_sec %= 60;
- if (time->tm_sec < 0) {
- time->tm_sec += 60;
- time->tm_min--;
- }
- }
-
- if (time->tm_min < 0 || time->tm_min >= 60) {
- time->tm_hour += time->tm_min / 60;
- time->tm_min %= 60;
- if (time->tm_min < 0) {
- time->tm_min += 60;
- time->tm_hour--;
- }
- }
-
- if (time->tm_hour < 0) {
- /* Decrement mday, yday, and wday */
- time->tm_hour += 24;
- time->tm_mday--;
- time->tm_yday--;
- if (time->tm_mday < 1) {
- time->tm_month--;
- if (time->tm_month < 0) {
- time->tm_month = 11;
- time->tm_year--;
- if (IsLeapYear(time->tm_year))
- time->tm_yday = 365;
- else
- time->tm_yday = 364;
- }
- time->tm_mday = nDays[IsLeapYear(time->tm_year)][time->tm_month];
- }
- time->tm_wday--;
- if (time->tm_wday < 0)
- time->tm_wday = 6;
- } else if (time->tm_hour > 23) {
- /* Increment mday, yday, and wday */
- time->tm_hour -= 24;
- time->tm_mday++;
- time->tm_yday++;
- if (time->tm_mday >
- nDays[IsLeapYear(time->tm_year)][time->tm_month]) {
- time->tm_mday = 1;
- time->tm_month++;
- if (time->tm_month > 11) {
- time->tm_month = 0;
- time->tm_year++;
- time->tm_yday = 0;
- }
- }
- time->tm_wday++;
- if (time->tm_wday > 6)
- time->tm_wday = 0;
- }
-}
-
-PR_IMPLEMENT(void)
-PR_NormalizeTime(PRExplodedTime *time, PRTimeParamFn params)
-{
- int daysInMonth;
- PRInt32 numDays;
-
- /* Get back to GMT */
- time->tm_sec -= time->tm_params.tp_gmt_offset
- + time->tm_params.tp_dst_offset;
- time->tm_params.tp_gmt_offset = 0;
- time->tm_params.tp_dst_offset = 0;
-
- /* Now normalize GMT */
-
- if (time->tm_usec < 0 || time->tm_usec >= 1000000) {
- time->tm_sec += time->tm_usec / 1000000;
- time->tm_usec %= 1000000;
- if (time->tm_usec < 0) {
- time->tm_usec += 1000000;
- time->tm_sec--;
- }
- }
-
- /* Note that we do not count leap seconds in this implementation */
- if (time->tm_sec < 0 || time->tm_sec >= 60) {
- time->tm_min += time->tm_sec / 60;
- time->tm_sec %= 60;
- if (time->tm_sec < 0) {
- time->tm_sec += 60;
- time->tm_min--;
- }
- }
-
- if (time->tm_min < 0 || time->tm_min >= 60) {
- time->tm_hour += time->tm_min / 60;
- time->tm_min %= 60;
- if (time->tm_min < 0) {
- time->tm_min += 60;
- time->tm_hour--;
- }
- }
-
- if (time->tm_hour < 0 || time->tm_hour >= 24) {
- time->tm_mday += time->tm_hour / 24;
- time->tm_hour %= 24;
- if (time->tm_hour < 0) {
- time->tm_hour += 24;
- time->tm_mday--;
- }
- }
-
- /* Normalize month and year before mday */
- if (time->tm_month < 0 || time->tm_month >= 12) {
- time->tm_year += time->tm_month / 12;
- time->tm_month %= 12;
- if (time->tm_month < 0) {
- time->tm_month += 12;
- time->tm_year--;
- }
- }
-
- /* Now that month and year are in proper range, normalize mday */
-
- if (time->tm_mday < 1) {
- /* mday too small */
- do {
- /* the previous month */
- time->tm_month--;
- if (time->tm_month < 0) {
- time->tm_month = 11;
- time->tm_year--;
- }
- time->tm_mday += nDays[IsLeapYear(time->tm_year)][time->tm_month];
- } while (time->tm_mday < 1);
- } else {
- daysInMonth = nDays[IsLeapYear(time->tm_year)][time->tm_month];
- while (time->tm_mday > daysInMonth) {
- /* mday too large */
- time->tm_mday -= daysInMonth;
- time->tm_month++;
- if (time->tm_month > 11) {
- time->tm_month = 0;
- time->tm_year++;
- }
- daysInMonth = nDays[IsLeapYear(time->tm_year)][time->tm_month];
- }
- }
-
- /* Recompute yday and wday */
- time->tm_yday = time->tm_mday +
- lastDayOfMonth[IsLeapYear(time->tm_year)][time->tm_month];
-
- numDays = DAYS_BETWEEN_YEARS(1970, time->tm_year) + time->tm_yday;
- time->tm_wday = (numDays + 4) % 7;
- if (time->tm_wday < 0) {
- time->tm_wday += 7;
- }
-
- /* Recompute time parameters */
-
- time->tm_params = params(time);
-
- ApplySecOffset(time, time->tm_params.tp_gmt_offset
- + time->tm_params.tp_dst_offset);
-}
-
-
-/*
- *-------------------------------------------------------------------------
- *
- * PR_LocalTimeParameters --
- *
- * returns the time parameters for the local time zone
- *
- * The following uses localtime() from the standard C library.
- * (time.h) This is our fallback implementation. Unix, PC, and BeOS
- * use this version. A platform may have its own machine-dependent
- * implementation of this function.
- *
- *-------------------------------------------------------------------------
- */
-
-#if defined(HAVE_INT_LOCALTIME_R)
-
-/*
- * In this case we could define the macro as
- * #define MT_safe_localtime(timer, result) \
- * (localtime_r(timer, result) == 0 ? result : NULL)
- * I chose to compare the return value of localtime_r with -1 so
- * that I can catch the cases where localtime_r returns a pointer
- * to struct tm. The macro definition above would not be able to
- * detect such mistakes because it is legal to compare a pointer
- * with 0.
- */
-
-#define MT_safe_localtime(timer, result) \
- (localtime_r(timer, result) == -1 ? NULL: result)
-
-#elif defined(HAVE_POINTER_LOCALTIME_R)
-
-#define MT_safe_localtime localtime_r
-
-#else
-
-#define HAVE_LOCALTIME_MONITOR 1 /* We use 'monitor' to serialize our calls
- * to localtime(). */
-static PRLock *monitor = NULL;
-
-static struct tm *MT_safe_localtime(const time_t *clock, struct tm *result)
-{
- struct tm *tmPtr;
- int needLock = PR_Initialized(); /* We need to use a lock to protect
- * against NSPR threads only when the
- * NSPR thread system is activated. */
-
- if (needLock) PR_Lock(monitor);
-
- /*
- * Microsoft (all flavors) localtime() returns a NULL pointer if 'clock'
- * represents a time before midnight January 1, 1970. In
- * that case, we also return a NULL pointer and the struct tm
- * object pointed to by 'result' is not modified.
- *
- * Watcom C/C++ 11.0 localtime() treats time_t as unsigned long
- * hence, does not recognize negative values of clock as pre-1/1/70.
- * We have to manually check (WIN16 only) for negative value of
- * clock and return NULL.
- *
- * With negative values of clock, OS/2 returns the struct tm for
- * clock plus ULONG_MAX. So we also have to check for the invalid
- * structs returned for timezones west of Greenwich when clock == 0.
- */
-
- tmPtr = localtime(clock);
-
-#if defined(WIN16) || defined(XP_OS2)
- if ( (PRInt32) *clock < 0 ||
- ( (PRInt32) *clock == 0 && tmPtr->tm_year != 70))
- result = NULL;
- else
- *result = *tmPtr;
-#else
- if (tmPtr) {
- *result = *tmPtr;
- } else {
- result = NULL;
- }
-#endif /* WIN16 */
-
- if (needLock) PR_Unlock(monitor);
-
- return result;
-}
-
-#endif /* definition of MT_safe_localtime() */
-
-void _PR_InitTime(void)
-{
-#ifdef HAVE_LOCALTIME_MONITOR
- monitor = PR_NewLock();
-#endif
-#ifdef WINCE
- _MD_InitTime();
-#endif
-}
-
-void _PR_CleanupTime(void)
-{
-#ifdef HAVE_LOCALTIME_MONITOR
- if (monitor) {
- PR_DestroyLock(monitor);
- monitor = NULL;
- }
-#endif
-#ifdef WINCE
- _MD_CleanupTime();
-#endif
-}
-
-#if defined(XP_UNIX) || defined(XP_PC) || defined(XP_BEOS)
-
-PR_IMPLEMENT(PRTimeParameters)
-PR_LocalTimeParameters(const PRExplodedTime *gmt)
-{
-
- PRTimeParameters retVal;
- struct tm localTime;
- time_t secs;
- PRTime secs64;
- PRInt64 usecPerSec;
- PRInt64 usecPerSec_1;
- PRInt64 maxInt32;
- PRInt64 minInt32;
- PRInt32 dayOffset;
- PRInt32 offset2Jan1970;
- PRInt32 offsetNew;
- int isdst2Jan1970;
-
- /*
- * Calculate the GMT offset. First, figure out what is
- * 00:00:00 Jan. 2, 1970 GMT (which is exactly a day, or 86400
- * seconds, since the epoch) in local time. Then we calculate
- * the difference between local time and GMT in seconds:
- * gmt_offset = local_time - GMT
- *
- * Caveat: the validity of this calculation depends on two
- * assumptions:
- * 1. Daylight saving time was not in effect on Jan. 2, 1970.
- * 2. The time zone of the geographic location has not changed
- * since Jan. 2, 1970.
- */
-
- secs = 86400L;
- (void) MT_safe_localtime(&secs, &localTime);
-
- /* GMT is 00:00:00, 2nd of Jan. */
-
- offset2Jan1970 = (PRInt32)localTime.tm_sec
- + 60L * (PRInt32)localTime.tm_min
- + 3600L * (PRInt32)localTime.tm_hour
- + 86400L * (PRInt32)((PRInt32)localTime.tm_mday - 2L);
-
- isdst2Jan1970 = localTime.tm_isdst;
-
- /*
- * Now compute DST offset. We calculate the overall offset
- * of local time from GMT, similar to above. The overall
- * offset has two components: gmt offset and dst offset.
- * We subtract gmt offset from the overall offset to get
- * the dst offset.
- * overall_offset = local_time - GMT
- * overall_offset = gmt_offset + dst_offset
- * ==> dst_offset = local_time - GMT - gmt_offset
- */
-
- secs64 = PR_ImplodeTime(gmt); /* This is still in microseconds */
- LL_I2L(usecPerSec, PR_USEC_PER_SEC);
- LL_I2L(usecPerSec_1, PR_USEC_PER_SEC - 1);
- /* Convert to seconds, truncating down (3.1 -> 3 and -3.1 -> -4) */
- if (LL_GE_ZERO(secs64)) {
- LL_DIV(secs64, secs64, usecPerSec);
- } else {
- LL_NEG(secs64, secs64);
- LL_ADD(secs64, secs64, usecPerSec_1);
- LL_DIV(secs64, secs64, usecPerSec);
- LL_NEG(secs64, secs64);
- }
- LL_I2L(maxInt32, PR_INT32_MAX);
- LL_I2L(minInt32, PR_INT32_MIN);
- if (LL_CMP(secs64, >, maxInt32) || LL_CMP(secs64, <, minInt32)) {
- /* secs64 is too large or too small for time_t (32-bit integer) */
- retVal.tp_gmt_offset = offset2Jan1970;
- retVal.tp_dst_offset = 0;
- return retVal;
- }
- LL_L2I(secs, secs64);
-
- /*
- * On Windows, localtime() (and our MT_safe_localtime() too)
- * returns a NULL pointer for time before midnight January 1,
- * 1970 GMT. In that case, we just use the GMT offset for
- * Jan 2, 1970 and assume that DST was not in effect.
- */
-
- if (MT_safe_localtime(&secs, &localTime) == NULL) {
- retVal.tp_gmt_offset = offset2Jan1970;
- retVal.tp_dst_offset = 0;
- return retVal;
- }
-
- /*
- * dayOffset is the offset between local time and GMT in
- * the day component, which can only be -1, 0, or 1. We
- * use the day of the week to compute dayOffset.
- */
-
- dayOffset = (PRInt32) localTime.tm_wday - gmt->tm_wday;
-
- /*
- * Need to adjust for wrapping around of day of the week from
- * 6 back to 0.
- */
-
- if (dayOffset == -6) {
- /* Local time is Sunday (0) and GMT is Saturday (6) */
- dayOffset = 1;
- } else if (dayOffset == 6) {
- /* Local time is Saturday (6) and GMT is Sunday (0) */
- dayOffset = -1;
- }
-
- offsetNew = (PRInt32)localTime.tm_sec - gmt->tm_sec
- + 60L * ((PRInt32)localTime.tm_min - gmt->tm_min)
- + 3600L * ((PRInt32)localTime.tm_hour - gmt->tm_hour)
- + 86400L * (PRInt32)dayOffset;
-
- if (localTime.tm_isdst <= 0) {
- /* DST is not in effect */
- retVal.tp_gmt_offset = offsetNew;
- retVal.tp_dst_offset = 0;
- } else {
- /* DST is in effect */
- if (isdst2Jan1970 <=0) {
- /*
- * DST was not in effect back in 2 Jan. 1970.
- * Use the offset back then as the GMT offset,
- * assuming the time zone has not changed since then.
- */
- retVal.tp_gmt_offset = offset2Jan1970;
- retVal.tp_dst_offset = offsetNew - offset2Jan1970;
- } else {
- /*
- * DST was also in effect back in 2 Jan. 1970.
- * Then our clever trick (or rather, ugly hack) fails.
- * We will just assume DST offset is an hour.
- */
- retVal.tp_gmt_offset = offsetNew - 3600;
- retVal.tp_dst_offset = 3600;
- }
- }
-
- return retVal;
-}
-
-#endif /* defined(XP_UNIX) || defined(XP_PC) || defined(XP_BEOS) */
-
-/*
- *------------------------------------------------------------------------
- *
- * PR_USPacificTimeParameters --
- *
- * The time parameters function for the US Pacific Time Zone.
- *
- *------------------------------------------------------------------------
- */
-
-/*
- * Returns the mday of the first sunday of the month, where
- * mday and wday are for a given day in the month.
- * mdays start with 1 (e.g. 1..31).
- * wdays start with 0 and are in the range 0..6. 0 = Sunday.
- */
-#define firstSunday(mday, wday) (((mday - wday + 7 - 1) % 7) + 1)
-
-/*
- * Returns the mday for the N'th Sunday of the month, where
- * mday and wday are for a given day in the month.
- * mdays start with 1 (e.g. 1..31).
- * wdays start with 0 and are in the range 0..6. 0 = Sunday.
- * N has the following values: 0 = first, 1 = second (etc), -1 = last.
- * ndays is the number of days in that month, the same value as the
- * mday of the last day of the month.
- */
-static PRInt32
-NthSunday(PRInt32 mday, PRInt32 wday, PRInt32 N, PRInt32 ndays)
-{
- PRInt32 firstSun = firstSunday(mday, wday);
-
- if (N < 0)
- N = (ndays - firstSun) / 7;
- return firstSun + (7 * N);
-}
-
-typedef struct DSTParams {
- PRInt8 dst_start_month; /* 0 = January */
- PRInt8 dst_start_Nth_Sunday; /* N as defined above */
- PRInt8 dst_start_month_ndays; /* ndays as defined above */
- PRInt8 dst_end_month; /* 0 = January */
- PRInt8 dst_end_Nth_Sunday; /* N as defined above */
- PRInt8 dst_end_month_ndays; /* ndays as defined above */
-} DSTParams;
-
-static const DSTParams dstParams[2] = {
- /* year < 2007: First April Sunday - Last October Sunday */
- { 3, 0, 30, 9, -1, 31 },
- /* year >= 2007: Second March Sunday - First November Sunday */
- { 2, 1, 31, 10, 0, 30 }
-};
-
-PR_IMPLEMENT(PRTimeParameters)
-PR_USPacificTimeParameters(const PRExplodedTime *gmt)
-{
- const DSTParams *dst;
- PRTimeParameters retVal;
- PRExplodedTime st;
-
- /*
- * Based on geographic location and GMT, figure out offset of
- * standard time from GMT. In this example implementation, we
- * assume the local time zone is US Pacific Time.
- */
-
- retVal.tp_gmt_offset = -8L * 3600L;
-
- /*
- * Make a copy of GMT. Note that the tm_params field of this copy
- * is ignored.
- */
-
- st.tm_usec = gmt->tm_usec;
- st.tm_sec = gmt->tm_sec;
- st.tm_min = gmt->tm_min;
- st.tm_hour = gmt->tm_hour;
- st.tm_mday = gmt->tm_mday;
- st.tm_month = gmt->tm_month;
- st.tm_year = gmt->tm_year;
- st.tm_wday = gmt->tm_wday;
- st.tm_yday = gmt->tm_yday;
-
- /* Apply the offset to GMT to obtain the local standard time */
- ApplySecOffset(&st, retVal.tp_gmt_offset);
-
- if (st.tm_year < 2007) { /* first April Sunday - Last October Sunday */
- dst = &dstParams[0];
- } else { /* Second March Sunday - First November Sunday */
- dst = &dstParams[1];
- }
-
- /*
- * Apply the rules on standard time or GMT to obtain daylight saving
- * time offset. In this implementation, we use the US DST rule.
- */
- if (st.tm_month < dst->dst_start_month) {
- retVal.tp_dst_offset = 0L;
- } else if (st.tm_month == dst->dst_start_month) {
- int NthSun = NthSunday(st.tm_mday, st.tm_wday,
- dst->dst_start_Nth_Sunday,
- dst->dst_start_month_ndays);
- if (st.tm_mday < NthSun) { /* Before starting Sunday */
- retVal.tp_dst_offset = 0L;
- } else if (st.tm_mday == NthSun) { /* Starting Sunday */
- /* 01:59:59 PST -> 03:00:00 PDT */
- if (st.tm_hour < 2) {
- retVal.tp_dst_offset = 0L;
- } else {
- retVal.tp_dst_offset = 3600L;
- }
- } else { /* After starting Sunday */
- retVal.tp_dst_offset = 3600L;
- }
- } else if (st.tm_month < dst->dst_end_month) {
- retVal.tp_dst_offset = 3600L;
- } else if (st.tm_month == dst->dst_end_month) {
- int NthSun = NthSunday(st.tm_mday, st.tm_wday,
- dst->dst_end_Nth_Sunday,
- dst->dst_end_month_ndays);
- if (st.tm_mday < NthSun) { /* Before ending Sunday */
- retVal.tp_dst_offset = 3600L;
- } else if (st.tm_mday == NthSun) { /* Ending Sunday */
- /* 01:59:59 PDT -> 01:00:00 PST */
- if (st.tm_hour < 1) {
- retVal.tp_dst_offset = 3600L;
- } else {
- retVal.tp_dst_offset = 0L;
- }
- } else { /* After ending Sunday */
- retVal.tp_dst_offset = 0L;
- }
- } else {
- retVal.tp_dst_offset = 0L;
- }
- return retVal;
-}
-
-/*
- *------------------------------------------------------------------------
- *
- * PR_GMTParameters --
- *
- * Returns the PRTimeParameters for Greenwich Mean Time.
- * Trivially, both the tp_gmt_offset and tp_dst_offset fields are 0.
- *
- *------------------------------------------------------------------------
- */
-
-PR_IMPLEMENT(PRTimeParameters)
-PR_GMTParameters(const PRExplodedTime *gmt)
-{
- PRTimeParameters retVal = { 0, 0 };
- return retVal;
-}
-
-/*
- * The following code implements PR_ParseTimeString(). It is based on
- * ns/lib/xp/xp_time.c, revision 1.25, by Jamie Zawinski <jwz@netscape.com>.
- */
-
-/*
- * We only recognize the abbreviations of a small subset of time zones
- * in North America, Europe, and Japan.
- *
- * PST/PDT: Pacific Standard/Daylight Time
- * MST/MDT: Mountain Standard/Daylight Time
- * CST/CDT: Central Standard/Daylight Time
- * EST/EDT: Eastern Standard/Daylight Time
- * AST: Atlantic Standard Time
- * NST: Newfoundland Standard Time
- * GMT: Greenwich Mean Time
- * BST: British Summer Time
- * MET: Middle Europe Time
- * EET: Eastern Europe Time
- * JST: Japan Standard Time
- */
-
-typedef enum
-{
- TT_UNKNOWN,
-
- TT_SUN, TT_MON, TT_TUE, TT_WED, TT_THU, TT_FRI, TT_SAT,
-
- TT_JAN, TT_FEB, TT_MAR, TT_APR, TT_MAY, TT_JUN,
- TT_JUL, TT_AUG, TT_SEP, TT_OCT, TT_NOV, TT_DEC,
-
- TT_PST, TT_PDT, TT_MST, TT_MDT, TT_CST, TT_CDT, TT_EST, TT_EDT,
- TT_AST, TT_NST, TT_GMT, TT_BST, TT_MET, TT_EET, TT_JST
-} TIME_TOKEN;
-
-/*
- * This parses a time/date string into a PRTime
- * (microseconds after "1-Jan-1970 00:00:00 GMT").
- * It returns PR_SUCCESS on success, and PR_FAILURE
- * if the time/date string can't be parsed.
- *
- * Many formats are handled, including:
- *
- * 14 Apr 89 03:20:12
- * 14 Apr 89 03:20 GMT
- * Fri, 17 Mar 89 4:01:33
- * Fri, 17 Mar 89 4:01 GMT
- * Mon Jan 16 16:12 PDT 1989
- * Mon Jan 16 16:12 +0130 1989
- * 6 May 1992 16:41-JST (Wednesday)
- * 22-AUG-1993 10:59:12.82
- * 22-AUG-1993 10:59pm
- * 22-AUG-1993 12:59am
- * 22-AUG-1993 12:59 PM
- * Friday, August 04, 1995 3:54 PM
- * 06/21/95 04:24:34 PM
- * 20/06/95 21:07
- * 95-06-08 19:32:48 EDT
- *
- * If the input string doesn't contain a description of the timezone,
- * we consult the `default_to_gmt' to decide whether the string should
- * be interpreted relative to the local time zone (PR_FALSE) or GMT (PR_TRUE).
- * The correct value for this argument depends on what standard specified
- * the time string which you are parsing.
- */
-
-PR_IMPLEMENT(PRStatus)
-PR_ParseTimeStringToExplodedTime(
- const char *string,
- PRBool default_to_gmt,
- PRExplodedTime *result)
-{
- TIME_TOKEN dotw = TT_UNKNOWN;
- TIME_TOKEN month = TT_UNKNOWN;
- TIME_TOKEN zone = TT_UNKNOWN;
- int zone_offset = -1;
- int dst_offset = 0;
- int date = -1;
- PRInt32 year = -1;
- int hour = -1;
- int min = -1;
- int sec = -1;
-
- const char *rest = string;
-
- int iterations = 0;
-
- PR_ASSERT(string && result);
- if (!string || !result) return PR_FAILURE;
-
- while (*rest)
- {
-
- if (iterations++ > 1000)
- {
- return PR_FAILURE;
- }
-
- switch (*rest)
- {
- case 'a': case 'A':
- if (month == TT_UNKNOWN &&
- (rest[1] == 'p' || rest[1] == 'P') &&
- (rest[2] == 'r' || rest[2] == 'R'))
- month = TT_APR;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 's' || rest[1] == 'S') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_AST;
- else if (month == TT_UNKNOWN &&
- (rest[1] == 'u' || rest[1] == 'U') &&
- (rest[2] == 'g' || rest[2] == 'G'))
- month = TT_AUG;
- break;
- case 'b': case 'B':
- if (zone == TT_UNKNOWN &&
- (rest[1] == 's' || rest[1] == 'S') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_BST;
- break;
- case 'c': case 'C':
- if (zone == TT_UNKNOWN &&
- (rest[1] == 'd' || rest[1] == 'D') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_CDT;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 's' || rest[1] == 'S') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_CST;
- break;
- case 'd': case 'D':
- if (month == TT_UNKNOWN &&
- (rest[1] == 'e' || rest[1] == 'E') &&
- (rest[2] == 'c' || rest[2] == 'C'))
- month = TT_DEC;
- break;
- case 'e': case 'E':
- if (zone == TT_UNKNOWN &&
- (rest[1] == 'd' || rest[1] == 'D') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_EDT;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 'e' || rest[1] == 'E') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_EET;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 's' || rest[1] == 'S') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_EST;
- break;
- case 'f': case 'F':
- if (month == TT_UNKNOWN &&
- (rest[1] == 'e' || rest[1] == 'E') &&
- (rest[2] == 'b' || rest[2] == 'B'))
- month = TT_FEB;
- else if (dotw == TT_UNKNOWN &&
- (rest[1] == 'r' || rest[1] == 'R') &&
- (rest[2] == 'i' || rest[2] == 'I'))
- dotw = TT_FRI;
- break;
- case 'g': case 'G':
- if (zone == TT_UNKNOWN &&
- (rest[1] == 'm' || rest[1] == 'M') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_GMT;
- break;
- case 'j': case 'J':
- if (month == TT_UNKNOWN &&
- (rest[1] == 'a' || rest[1] == 'A') &&
- (rest[2] == 'n' || rest[2] == 'N'))
- month = TT_JAN;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 's' || rest[1] == 'S') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_JST;
- else if (month == TT_UNKNOWN &&
- (rest[1] == 'u' || rest[1] == 'U') &&
- (rest[2] == 'l' || rest[2] == 'L'))
- month = TT_JUL;
- else if (month == TT_UNKNOWN &&
- (rest[1] == 'u' || rest[1] == 'U') &&
- (rest[2] == 'n' || rest[2] == 'N'))
- month = TT_JUN;
- break;
- case 'm': case 'M':
- if (month == TT_UNKNOWN &&
- (rest[1] == 'a' || rest[1] == 'A') &&
- (rest[2] == 'r' || rest[2] == 'R'))
- month = TT_MAR;
- else if (month == TT_UNKNOWN &&
- (rest[1] == 'a' || rest[1] == 'A') &&
- (rest[2] == 'y' || rest[2] == 'Y'))
- month = TT_MAY;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 'd' || rest[1] == 'D') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_MDT;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 'e' || rest[1] == 'E') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_MET;
- else if (dotw == TT_UNKNOWN &&
- (rest[1] == 'o' || rest[1] == 'O') &&
- (rest[2] == 'n' || rest[2] == 'N'))
- dotw = TT_MON;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 's' || rest[1] == 'S') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_MST;
- break;
- case 'n': case 'N':
- if (month == TT_UNKNOWN &&
- (rest[1] == 'o' || rest[1] == 'O') &&
- (rest[2] == 'v' || rest[2] == 'V'))
- month = TT_NOV;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 's' || rest[1] == 'S') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_NST;
- break;
- case 'o': case 'O':
- if (month == TT_UNKNOWN &&
- (rest[1] == 'c' || rest[1] == 'C') &&
- (rest[2] == 't' || rest[2] == 'T'))
- month = TT_OCT;
- break;
- case 'p': case 'P':
- if (zone == TT_UNKNOWN &&
- (rest[1] == 'd' || rest[1] == 'D') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_PDT;
- else if (zone == TT_UNKNOWN &&
- (rest[1] == 's' || rest[1] == 'S') &&
- (rest[2] == 't' || rest[2] == 'T'))
- zone = TT_PST;
- break;
- case 's': case 'S':
- if (dotw == TT_UNKNOWN &&
- (rest[1] == 'a' || rest[1] == 'A') &&
- (rest[2] == 't' || rest[2] == 'T'))
- dotw = TT_SAT;
- else if (month == TT_UNKNOWN &&
- (rest[1] == 'e' || rest[1] == 'E') &&
- (rest[2] == 'p' || rest[2] == 'P'))
- month = TT_SEP;
- else if (dotw == TT_UNKNOWN &&
- (rest[1] == 'u' || rest[1] == 'U') &&
- (rest[2] == 'n' || rest[2] == 'N'))
- dotw = TT_SUN;
- break;
- case 't': case 'T':
- if (dotw == TT_UNKNOWN &&
- (rest[1] == 'h' || rest[1] == 'H') &&
- (rest[2] == 'u' || rest[2] == 'U'))
- dotw = TT_THU;
- else if (dotw == TT_UNKNOWN &&
- (rest[1] == 'u' || rest[1] == 'U') &&
- (rest[2] == 'e' || rest[2] == 'E'))
- dotw = TT_TUE;
- break;
- case 'u': case 'U':
- if (zone == TT_UNKNOWN &&
- (rest[1] == 't' || rest[1] == 'T') &&
- !(rest[2] >= 'A' && rest[2] <= 'Z') &&
- !(rest[2] >= 'a' && rest[2] <= 'z'))
- /* UT is the same as GMT but UTx is not. */
- zone = TT_GMT;
- break;
- case 'w': case 'W':
- if (dotw == TT_UNKNOWN &&
- (rest[1] == 'e' || rest[1] == 'E') &&
- (rest[2] == 'd' || rest[2] == 'D'))
- dotw = TT_WED;
- break;
-
- case '+': case '-':
- {
- const char *end;
- int sign;
- if (zone_offset != -1)
- {
- /* already got one... */
- rest++;
- break;
- }
- if (zone != TT_UNKNOWN && zone != TT_GMT)
- {
- /* GMT+0300 is legal, but PST+0300 is not. */
- rest++;
- break;
- }
-
- sign = ((*rest == '+') ? 1 : -1);
- rest++; /* move over sign */
- end = rest;
- while (*end >= '0' && *end <= '9')
- end++;
- if (rest == end) /* no digits here */
- break;
-
- if ((end - rest) == 4)
- /* offset in HHMM */
- zone_offset = (((((rest[0]-'0')*10) + (rest[1]-'0')) * 60) +
- (((rest[2]-'0')*10) + (rest[3]-'0')));
- else if ((end - rest) == 2)
- /* offset in hours */
- zone_offset = (((rest[0]-'0')*10) + (rest[1]-'0')) * 60;
- else if ((end - rest) == 1)
- /* offset in hours */
- zone_offset = (rest[0]-'0') * 60;
- else
- /* 3 or >4 */
- break;
-
- zone_offset *= sign;
- zone = TT_GMT;
- break;
- }
-
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- int tmp_hour = -1;
- int tmp_min = -1;
- int tmp_sec = -1;
- const char *end = rest + 1;
- while (*end >= '0' && *end <= '9')
- end++;
-
- /* end is now the first character after a range of digits. */
-
- if (*end == ':')
- {
- if (hour >= 0 && min >= 0) /* already got it */
- break;
-
- /* We have seen "[0-9]+:", so this is probably HH:MM[:SS] */
- if ((end - rest) > 2)
- /* it is [0-9][0-9][0-9]+: */
- break;
- else if ((end - rest) == 2)
- tmp_hour = ((rest[0]-'0')*10 +
- (rest[1]-'0'));
- else
- tmp_hour = (rest[0]-'0');
-
- /* move over the colon, and parse minutes */
-
- rest = ++end;
- while (*end >= '0' && *end <= '9')
- end++;
-
- if (end == rest)
- /* no digits after first colon? */
- break;
- else if ((end - rest) > 2)
- /* it is [0-9][0-9][0-9]+: */
- break;
- else if ((end - rest) == 2)
- tmp_min = ((rest[0]-'0')*10 +
- (rest[1]-'0'));
- else
- tmp_min = (rest[0]-'0');
-
- /* now go for seconds */
- rest = end;
- if (*rest == ':')
- rest++;
- end = rest;
- while (*end >= '0' && *end <= '9')
- end++;
-
- if (end == rest)
- /* no digits after second colon - that's ok. */
- ;
- else if ((end - rest) > 2)
- /* it is [0-9][0-9][0-9]+: */
- break;
- else if ((end - rest) == 2)
- tmp_sec = ((rest[0]-'0')*10 +
- (rest[1]-'0'));
- else
- tmp_sec = (rest[0]-'0');
-
- /* If we made it here, we've parsed hour and min,
- and possibly sec, so it worked as a unit. */
-
- /* skip over whitespace and see if there's an AM or PM
- directly following the time.
- */
- if (tmp_hour <= 12)
- {
- const char *s = end;
- while (*s && (*s == ' ' || *s == '\t'))
- s++;
- if ((s[0] == 'p' || s[0] == 'P') &&
- (s[1] == 'm' || s[1] == 'M'))
- /* 10:05pm == 22:05, and 12:05pm == 12:05 */
- tmp_hour = (tmp_hour == 12 ? 12 : tmp_hour + 12);
- else if (tmp_hour == 12 &&
- (s[0] == 'a' || s[0] == 'A') &&
- (s[1] == 'm' || s[1] == 'M'))
- /* 12:05am == 00:05 */
- tmp_hour = 0;
- }
-
- hour = tmp_hour;
- min = tmp_min;
- sec = tmp_sec;
- rest = end;
- break;
- }
- else if ((*end == '/' || *end == '-') &&
- end[1] >= '0' && end[1] <= '9')
- {
- /* Perhaps this is 6/16/95, 16/6/95, 6-16-95, or 16-6-95
- or even 95-06-05...
- #### But it doesn't handle 1995-06-22.
- */
- int n1, n2, n3;
- const char *s;
-
- if (month != TT_UNKNOWN)
- /* if we saw a month name, this can't be. */
- break;
-
- s = rest;
-
- n1 = (*s++ - '0'); /* first 1 or 2 digits */
- if (*s >= '0' && *s <= '9')
- n1 = n1*10 + (*s++ - '0');
-
- if (*s != '/' && *s != '-') /* slash */
- break;
- s++;
-
- if (*s < '0' || *s > '9') /* second 1 or 2 digits */
- break;
- n2 = (*s++ - '0');
- if (*s >= '0' && *s <= '9')
- n2 = n2*10 + (*s++ - '0');
-
- if (*s != '/' && *s != '-') /* slash */
- break;
- s++;
-
- if (*s < '0' || *s > '9') /* third 1, 2, 4, or 5 digits */
- break;
- n3 = (*s++ - '0');
- if (*s >= '0' && *s <= '9')
- n3 = n3*10 + (*s++ - '0');
-
- if (*s >= '0' && *s <= '9') /* optional digits 3, 4, and 5 */
- {
- n3 = n3*10 + (*s++ - '0');
- if (*s < '0' || *s > '9')
- break;
- n3 = n3*10 + (*s++ - '0');
- if (*s >= '0' && *s <= '9')
- n3 = n3*10 + (*s++ - '0');
- }
-
- if ((*s >= '0' && *s <= '9') || /* followed by non-alphanum */
- (*s >= 'A' && *s <= 'Z') ||
- (*s >= 'a' && *s <= 'z'))
- break;
-
- /* Ok, we parsed three 1-2 digit numbers, with / or -
- between them. Now decide what the hell they are
- (DD/MM/YY or MM/DD/YY or YY/MM/DD.)
- */
-
- if (n1 > 31 || n1 == 0) /* must be YY/MM/DD */
- {
- if (n2 > 12) break;
- if (n3 > 31) break;
- year = n1;
- if (year < 70)
- year += 2000;
- else if (year < 100)
- year += 1900;
- month = (TIME_TOKEN)(n2 + ((int)TT_JAN) - 1);
- date = n3;
- rest = s;
- break;
- }
-
- if (n1 > 12 && n2 > 12) /* illegal */
- {
- rest = s;
- break;
- }
-
- if (n3 < 70)
- n3 += 2000;
- else if (n3 < 100)
- n3 += 1900;
-
- if (n1 > 12) /* must be DD/MM/YY */
- {
- date = n1;
- month = (TIME_TOKEN)(n2 + ((int)TT_JAN) - 1);
- year = n3;
- }
- else /* assume MM/DD/YY */
- {
- /* #### In the ambiguous case, should we consult the
- locale to find out the local default? */
- month = (TIME_TOKEN)(n1 + ((int)TT_JAN) - 1);
- date = n2;
- year = n3;
- }
- rest = s;
- }
- else if ((*end >= 'A' && *end <= 'Z') ||
- (*end >= 'a' && *end <= 'z'))
- /* Digits followed by non-punctuation - what's that? */
- ;
- else if ((end - rest) == 5) /* five digits is a year */
- year = (year < 0
- ? ((rest[0]-'0')*10000L +
- (rest[1]-'0')*1000L +
- (rest[2]-'0')*100L +
- (rest[3]-'0')*10L +
- (rest[4]-'0'))
- : year);
- else if ((end - rest) == 4) /* four digits is a year */
- year = (year < 0
- ? ((rest[0]-'0')*1000L +
- (rest[1]-'0')*100L +
- (rest[2]-'0')*10L +
- (rest[3]-'0'))
- : year);
- else if ((end - rest) == 2) /* two digits - date or year */
- {
- int n = ((rest[0]-'0')*10 +
- (rest[1]-'0'));
- /* If we don't have a date (day of the month) and we see a number
- less than 32, then assume that is the date.
-
- Otherwise, if we have a date and not a year, assume this is the
- year. If it is less than 70, then assume it refers to the 21st
- century. If it is two digits (>= 70), assume it refers to this
- century. Otherwise, assume it refers to an unambiguous year.
-
- The world will surely end soon.
- */
- if (date < 0 && n < 32)
- date = n;
- else if (year < 0)
- {
- if (n < 70)
- year = 2000 + n;
- else if (n < 100)
- year = 1900 + n;
- else
- year = n;
- }
- /* else what the hell is this. */
- }
- else if ((end - rest) == 1) /* one digit - date */
- date = (date < 0 ? (rest[0]-'0') : date);
- /* else, three or more than five digits - what's that? */
-
- break;
- }
- }
-
- /* Skip to the end of this token, whether we parsed it or not.
- Tokens are delimited by whitespace, or ,;-/
- But explicitly not :+-.
- */
- while (*rest &&
- *rest != ' ' && *rest != '\t' &&
- *rest != ',' && *rest != ';' &&
- *rest != '-' && *rest != '+' &&
- *rest != '/' &&
- *rest != '(' && *rest != ')' && *rest != '[' && *rest != ']')
- rest++;
- /* skip over uninteresting chars. */
- SKIP_MORE:
- while (*rest &&
- (*rest == ' ' || *rest == '\t' ||
- *rest == ',' || *rest == ';' || *rest == '/' ||
- *rest == '(' || *rest == ')' || *rest == '[' || *rest == ']'))
- rest++;
-
- /* "-" is ignored at the beginning of a token if we have not yet
- parsed a year (e.g., the second "-" in "30-AUG-1966"), or if
- the character after the dash is not a digit. */
- if (*rest == '-' && ((rest > string &&
- isalpha((unsigned char)rest[-1]) && year < 0) ||
- rest[1] < '0' || rest[1] > '9'))
- {
- rest++;
- goto SKIP_MORE;
- }
-
- }
-
- if (zone != TT_UNKNOWN && zone_offset == -1)
- {
- switch (zone)
- {
- case TT_PST: zone_offset = -8 * 60; break;
- case TT_PDT: zone_offset = -8 * 60; dst_offset = 1 * 60; break;
- case TT_MST: zone_offset = -7 * 60; break;
- case TT_MDT: zone_offset = -7 * 60; dst_offset = 1 * 60; break;
- case TT_CST: zone_offset = -6 * 60; break;
- case TT_CDT: zone_offset = -6 * 60; dst_offset = 1 * 60; break;
- case TT_EST: zone_offset = -5 * 60; break;
- case TT_EDT: zone_offset = -5 * 60; dst_offset = 1 * 60; break;
- case TT_AST: zone_offset = -4 * 60; break;
- case TT_NST: zone_offset = -3 * 60 - 30; break;
- case TT_GMT: zone_offset = 0 * 60; break;
- case TT_BST: zone_offset = 0 * 60; dst_offset = 1 * 60; break;
- case TT_MET: zone_offset = 1 * 60; break;
- case TT_EET: zone_offset = 2 * 60; break;
- case TT_JST: zone_offset = 9 * 60; break;
- default:
- PR_ASSERT (0);
- break;
- }
- }
-
- /* If we didn't find a year, month, or day-of-the-month, we can't
- possibly parse this, and in fact, mktime() will do something random
- (I'm seeing it return "Tue Feb 5 06:28:16 2036", which is no doubt
- a numerologically significant date... */
- if (month == TT_UNKNOWN || date == -1 || year == -1 || year > PR_INT16_MAX)
- return PR_FAILURE;
-
- memset(result, 0, sizeof(*result));
- if (sec != -1)
- result->tm_sec = sec;
- if (min != -1)
- result->tm_min = min;
- if (hour != -1)
- result->tm_hour = hour;
- if (date != -1)
- result->tm_mday = date;
- if (month != TT_UNKNOWN)
- result->tm_month = (((int)month) - ((int)TT_JAN));
- if (year != -1)
- result->tm_year = year;
- if (dotw != TT_UNKNOWN)
- result->tm_wday = (((int)dotw) - ((int)TT_SUN));
- /*
- * Mainly to compute wday and yday, but normalized time is also required
- * by the check below that works around a Visual C++ 2005 mktime problem.
- */
- PR_NormalizeTime(result, PR_GMTParameters);
- /* The remaining work is to set the gmt and dst offsets in tm_params. */
-
- if (zone == TT_UNKNOWN && default_to_gmt)
- {
- /* No zone was specified, so pretend the zone was GMT. */
- zone = TT_GMT;
- zone_offset = 0;
- }
-
- if (zone_offset == -1)
- {
- /* no zone was specified, and we're to assume that everything
- is local. */
- struct tm localTime;
- time_t secs;
-
- PR_ASSERT(result->tm_month > -1 &&
- result->tm_mday > 0 &&
- result->tm_hour > -1 &&
- result->tm_min > -1 &&
- result->tm_sec > -1);
-
- /*
- * To obtain time_t from a tm structure representing the local
- * time, we call mktime(). However, we need to see if we are
- * on 1-Jan-1970 or before. If we are, we can't call mktime()
- * because mktime() will crash on win16. In that case, we
- * calculate zone_offset based on the zone offset at
- * 00:00:00, 2 Jan 1970 GMT, and subtract zone_offset from the
- * date we are parsing to transform the date to GMT. We also
- * do so if mktime() returns (time_t) -1 (time out of range).
- */
-
- /* month, day, hours, mins and secs are always non-negative
- so we dont need to worry about them. */
- if(result->tm_year >= 1970)
- {
- PRInt64 usec_per_sec;
-
- localTime.tm_sec = result->tm_sec;
- localTime.tm_min = result->tm_min;
- localTime.tm_hour = result->tm_hour;
- localTime.tm_mday = result->tm_mday;
- localTime.tm_mon = result->tm_month;
- localTime.tm_year = result->tm_year - 1900;
- /* Set this to -1 to tell mktime "I don't care". If you set
- it to 0 or 1, you are making assertions about whether the
- date you are handing it is in daylight savings mode or not;
- and if you're wrong, it will "fix" it for you. */
- localTime.tm_isdst = -1;
-
-#if _MSC_VER == 1400 /* 1400 = Visual C++ 2005 (8.0) */
- /*
- * mktime will return (time_t) -1 if the input is a date
- * after 23:59:59, December 31, 3000, US Pacific Time (not
- * UTC as documented):
- * http://msdn.microsoft.com/en-us/library/d1y53h2a(VS.80).aspx
- * But if the year is 3001, mktime also invokes the invalid
- * parameter handler, causing the application to crash. This
- * problem has been reported in
- * http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=266036.
- * We avoid this crash by not calling mktime if the date is
- * out of range. To use a simple test that works in any time
- * zone, we consider year 3000 out of range as well. (See
- * bug 480740.)
- */
- if (result->tm_year >= 3000) {
- /* Emulate what mktime would have done. */
- errno = EINVAL;
- secs = (time_t) -1;
- } else {
- secs = mktime(&localTime);
- }
-#else
- secs = mktime(&localTime);
-#endif
- if (secs != (time_t) -1)
- {
- PRTime usecs64;
- LL_I2L(usecs64, secs);
- LL_I2L(usec_per_sec, PR_USEC_PER_SEC);
- LL_MUL(usecs64, usecs64, usec_per_sec);
- PR_ExplodeTime(usecs64, PR_LocalTimeParameters, result);
- return PR_SUCCESS;
- }
- }
-
- /* So mktime() can't handle this case. We assume the
- zone_offset for the date we are parsing is the same as
- the zone offset on 00:00:00 2 Jan 1970 GMT. */
- secs = 86400;
- (void) MT_safe_localtime(&secs, &localTime);
- zone_offset = localTime.tm_min
- + 60 * localTime.tm_hour
- + 1440 * (localTime.tm_mday - 2);
- }
-
- result->tm_params.tp_gmt_offset = zone_offset * 60;
- result->tm_params.tp_dst_offset = dst_offset * 60;
-
- return PR_SUCCESS;
-}
-
-PR_IMPLEMENT(PRStatus)
-PR_ParseTimeString(
- const char *string,
- PRBool default_to_gmt,
- PRTime *result)
-{
- PRExplodedTime tm;
- PRStatus rv;
-
- rv = PR_ParseTimeStringToExplodedTime(string,
- default_to_gmt,
- &tm);
- if (rv != PR_SUCCESS)
- return rv;
-
- *result = PR_ImplodeTime(&tm);
-
- return PR_SUCCESS;
-}
-
-/*
- *******************************************************************
- *******************************************************************
- **
- ** OLD COMPATIBILITY FUNCTIONS
- **
- *******************************************************************
- *******************************************************************
- */
-
-
-/*
- *-----------------------------------------------------------------------
- *
- * PR_FormatTime --
- *
- * Format a time value into a buffer. Same semantics as strftime().
- *
- *-----------------------------------------------------------------------
- */
-
-PR_IMPLEMENT(PRUint32)
-PR_FormatTime(char *buf, int buflen, const char *fmt,
- const PRExplodedTime *time)
-{
- size_t rv;
- struct tm a;
- struct tm *ap;
-
- if (time) {
- ap = &a;
- a.tm_sec = time->tm_sec;
- a.tm_min = time->tm_min;
- a.tm_hour = time->tm_hour;
- a.tm_mday = time->tm_mday;
- a.tm_mon = time->tm_month;
- a.tm_wday = time->tm_wday;
- a.tm_year = time->tm_year - 1900;
- a.tm_yday = time->tm_yday;
- a.tm_isdst = time->tm_params.tp_dst_offset ? 1 : 0;
-
- /*
- * On some platforms, for example SunOS 4, struct tm has two
- * additional fields: tm_zone and tm_gmtoff.
- */
-
-#if (__GLIBC__ >= 2) || defined(XP_BEOS) \
- || defined(NETBSD) || defined(OPENBSD) || defined(FREEBSD) \
- || defined(DARWIN) || defined(SYMBIAN) || defined(ANDROID)
- a.tm_zone = NULL;
- a.tm_gmtoff = time->tm_params.tp_gmt_offset +
- time->tm_params.tp_dst_offset;
-#endif
- } else {
- ap = NULL;
- }
-
- rv = strftime(buf, buflen, fmt, ap);
- if (!rv && buf && buflen > 0) {
- /*
- * When strftime fails, the contents of buf are indeterminate.
- * Some callers don't check the return value from this function,
- * so store an empty string in buf in case they try to print it.
- */
- buf[0] = '\0';
- }
- return rv;
-}
-
-
-/*
- * The following string arrays and macros are used by PR_FormatTimeUSEnglish().
- */
-
-static const char* abbrevDays[] =
-{
- "Sun","Mon","Tue","Wed","Thu","Fri","Sat"
-};
-
-static const char* days[] =
-{
- "Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"
-};
-
-static const char* abbrevMonths[] =
-{
- "Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
-};
-
-static const char* months[] =
-{
- "January", "February", "March", "April", "May", "June",
- "July", "August", "September", "October", "November", "December"
-};
-
-
-/*
- * Add a single character to the given buffer, incrementing the buffer pointer
- * and decrementing the buffer size. Return 0 on error.
- */
-#define ADDCHAR( buf, bufSize, ch ) \
-do \
-{ \
- if( bufSize < 1 ) \
- { \
- *(--buf) = '\0'; \
- return 0; \
- } \
- *buf++ = ch; \
- bufSize--; \
-} \
-while(0)
-
-
-/*
- * Add a string to the given buffer, incrementing the buffer pointer
- * and decrementing the buffer size appropriately. Return 0 on error.
- */
-#define ADDSTR( buf, bufSize, str ) \
-do \
-{ \
- PRUint32 strSize = strlen( str ); \
- if( strSize > bufSize ) \
- { \
- if( bufSize==0 ) \
- *(--buf) = '\0'; \
- else \
- *buf = '\0'; \
- return 0; \
- } \
- memcpy(buf, str, strSize); \
- buf += strSize; \
- bufSize -= strSize; \
-} \
-while(0)
-
-/* Needed by PR_FormatTimeUSEnglish() */
-static unsigned int pr_WeekOfYear(const PRExplodedTime* time,
- unsigned int firstDayOfWeek);
-
-
-/***********************************************************************************
- *
- * Description:
- * This is a dumbed down version of strftime that will format the date in US
- * English regardless of the setting of the global locale. This functionality is
- * needed to write things like MIME headers which must always be in US English.
- *
- **********************************************************************************/
-
-PR_IMPLEMENT(PRUint32)
-PR_FormatTimeUSEnglish( char* buf, PRUint32 bufSize,
- const char* format, const PRExplodedTime* time )
-{
- char* bufPtr = buf;
- const char* fmtPtr;
- char tmpBuf[ 40 ];
- const int tmpBufSize = sizeof( tmpBuf );
-
-
- for( fmtPtr=format; *fmtPtr != '\0'; fmtPtr++ )
- {
- if( *fmtPtr != '%' )
- {
- ADDCHAR( bufPtr, bufSize, *fmtPtr );
- }
- else
- {
- switch( *(++fmtPtr) )
- {
- case '%':
- /* escaped '%' character */
- ADDCHAR( bufPtr, bufSize, '%' );
- break;
-
- case 'a':
- /* abbreviated weekday name */
- ADDSTR( bufPtr, bufSize, abbrevDays[ time->tm_wday ] );
- break;
-
- case 'A':
- /* full weekday name */
- ADDSTR( bufPtr, bufSize, days[ time->tm_wday ] );
- break;
-
- case 'b':
- /* abbreviated month name */
- ADDSTR( bufPtr, bufSize, abbrevMonths[ time->tm_month ] );
- break;
-
- case 'B':
- /* full month name */
- ADDSTR(bufPtr, bufSize, months[ time->tm_month ] );
- break;
-
- case 'c':
- /* Date and time. */
- PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%a %b %d %H:%M:%S %Y", time );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'd':
- /* day of month ( 01 - 31 ) */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_mday );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'H':
- /* hour ( 00 - 23 ) */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_hour );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'I':
- /* hour ( 01 - 12 ) */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",
- (time->tm_hour%12) ? time->tm_hour%12 : (PRInt32) 12 );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'j':
- /* day number of year ( 001 - 366 ) */
- PR_snprintf(tmpBuf,tmpBufSize,"%.3d",time->tm_yday + 1);
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'm':
- /* month number ( 01 - 12 ) */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_month+1);
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'M':
- /* minute ( 00 - 59 ) */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_min );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'p':
- /* locale's equivalent of either AM or PM */
- ADDSTR( bufPtr, bufSize, (time->tm_hour<12)?"AM":"PM" );
- break;
-
- case 'S':
- /* seconds ( 00 - 61 ), allows for leap seconds */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_sec );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'U':
- /* week number of year ( 00 - 53 ), Sunday is the first day of week 1 */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2d", pr_WeekOfYear( time, 0 ) );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'w':
- /* weekday number ( 0 - 6 ), Sunday = 0 */
- PR_snprintf(tmpBuf,tmpBufSize,"%d",time->tm_wday );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'W':
- /* Week number of year ( 00 - 53 ), Monday is the first day of week 1 */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2d", pr_WeekOfYear( time, 1 ) );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'x':
- /* Date representation */
- PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%m/%d/%y", time );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'X':
- /* Time representation. */
- PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%H:%M:%S", time );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'y':
- /* year within century ( 00 - 99 ) */
- PR_snprintf(tmpBuf,tmpBufSize,"%.2d",time->tm_year % 100 );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'Y':
- /* year as ccyy ( for example 1986 ) */
- PR_snprintf(tmpBuf,tmpBufSize,"%.4d",time->tm_year );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- case 'Z':
- /* Time zone name or no characters if no time zone exists.
- * Since time zone name is supposed to be independant of locale, we
- * defer to PR_FormatTime() for this option.
- */
- PR_FormatTime( tmpBuf, tmpBufSize, "%Z", time );
- ADDSTR( bufPtr, bufSize, tmpBuf );
- break;
-
- default:
- /* Unknown format. Simply copy format into output buffer. */
- ADDCHAR( bufPtr, bufSize, '%' );
- ADDCHAR( bufPtr, bufSize, *fmtPtr );
- break;
-
- }
- }
- }
-
- ADDCHAR( bufPtr, bufSize, '\0' );
- return (PRUint32)(bufPtr - buf - 1);
-}
-
-
-
-/***********************************************************************************
- *
- * Description:
- * Returns the week number of the year (0-53) for the given time. firstDayOfWeek
- * is the day on which the week is considered to start (0=Sun, 1=Mon, ...).
- * Week 1 starts the first time firstDayOfWeek occurs in the year. In other words,
- * a partial week at the start of the year is considered week 0.
- *
- **********************************************************************************/
-
-static unsigned int
-pr_WeekOfYear(const PRExplodedTime* time, unsigned int firstDayOfWeek)
-{
- int dayOfWeek;
- int dayOfYear;
-
- /* Get the day of the year for the given time then adjust it to represent the
- * first day of the week containing the given time.
- */
- dayOfWeek = time->tm_wday - firstDayOfWeek;
- if (dayOfWeek < 0)
- dayOfWeek += 7;
-
- dayOfYear = time->tm_yday - dayOfWeek;
-
-
- if( dayOfYear <= 0 )
- {
- /* If dayOfYear is <= 0, it is in the first partial week of the year. */
- return 0;
- }
- else
- {
- /* Count the number of full weeks ( dayOfYear / 7 ) then add a week if there
- * are any days left over ( dayOfYear % 7 ). Because we are only counting to
- * the first day of the week containing the given time, rather than to the
- * actual day representing the given time, any days in week 0 will be "absorbed"
- * as extra days in the given week.
- */
- return (dayOfYear / 7) + ( (dayOfYear % 7) == 0 ? 0 : 1 );
- }
-}
-
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