зеркало из https://github.com/mozilla/gecko-dev.git
586 строки
16 KiB
C
586 строки
16 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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* PR time code.
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*
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* XXXbe PR_DSTOffset uses PR_basetime, should use A.D.Olson code instead
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*/
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#ifdef SOLARIS
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#define _REENTRANT 1
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#endif
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#include <string.h>
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#include <time.h>
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#include "prtypes.h"
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#include "prosdep.h"
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#include "prprintf.h"
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#include "prtime.h"
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#define PR_DO_MILLISECONDS 1
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#ifdef XP_PC
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#include <sys/timeb.h>
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#endif
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#ifdef XP_MAC
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#include <OSUtils.h>
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#include <TextUtils.h>
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#include <Resources.h>
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#include <Timer.h>
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#endif
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#ifdef XP_UNIX
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#ifdef SOLARIS
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extern int gettimeofday(struct timeval *tv);
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#endif
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#include <sys/time.h>
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#ifdef NEED_TIME_R
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/* Awful hack, but... */
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struct tm *gmtime_r(const time_t *a, struct tm *b)
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{
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*b = *gmtime(a);
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return b;
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}
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struct tm *localtime_r(const time_t *a, struct tm *b)
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{
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*b = *localtime(a);
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return b;
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}
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#endif /* NEED_TIME_R */
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#endif /* XP_UNIX */
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#ifdef XP_MAC
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UnsignedWide dstLocalBaseMicroseconds;
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unsigned long gJanuaryFirst1970Seconds;
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static void MacintoshInitializeTime(void)
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{
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UnsignedWide upTime;
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unsigned long currentLocalTimeSeconds,
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startupTimeSeconds;
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uint64 startupTimeMicroSeconds;
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uint32 upTimeSeconds;
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uint64 oneMillion, upTimeSecondsLong, microSecondsToSeconds;
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DateTimeRec firstSecondOfUnixTime;
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// Figure out in local time what time the machine
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// started up. This information can be added to
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// upTime to figure out the current local time
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// as well as GMT.
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Microseconds(&upTime);
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GetDateTime(¤tLocalTimeSeconds);
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LL_I2L(microSecondsToSeconds, PR_USEC_PER_SEC);
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LL_DIV(upTimeSecondsLong, *((uint64 *)&upTime), microSecondsToSeconds);
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LL_L2I(upTimeSeconds, upTimeSecondsLong);
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startupTimeSeconds = currentLocalTimeSeconds - upTimeSeconds;
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// Make sure that we normalize the macintosh base seconds
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// to the unix base of January 1, 1970.
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firstSecondOfUnixTime.year = 1970;
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firstSecondOfUnixTime.month = 1;
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firstSecondOfUnixTime.day = 1;
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firstSecondOfUnixTime.hour = 0;
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firstSecondOfUnixTime.minute = 0;
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firstSecondOfUnixTime.second = 0;
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firstSecondOfUnixTime.dayOfWeek = 0;
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DateToSeconds(&firstSecondOfUnixTime, &gJanuaryFirst1970Seconds);
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startupTimeSeconds -= gJanuaryFirst1970Seconds;
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// Now convert the startup time into a wide so that we
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// can figure out GMT and DST.
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LL_I2L(startupTimeMicroSeconds, startupTimeSeconds);
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LL_I2L(oneMillion, PR_USEC_PER_SEC);
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LL_MUL(dstLocalBaseMicroseconds, oneMillion, startupTimeMicroSeconds);
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}
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// Because serial port and SLIP conflict with ReadXPram calls,
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// we cache the call here
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static void MyReadLocation(MachineLocation * loc)
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{
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static MachineLocation storedLoc; // InsideMac, OSUtilities, page 4-20
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static PRBool didReadLocation = PR_FALSE;
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if (!didReadLocation)
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{
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MacintoshInitializeTime();
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ReadLocation(&storedLoc);
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didReadLocation = PR_TRUE;
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}
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*loc = storedLoc;
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}
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#endif
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#define IS_LEAP(year) \
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(year != 0 && ((((year & 0x3) == 0) && \
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((year - ((year/100) * 100)) != 0)) || \
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(year - ((year/400) * 400)) == 0))
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#define PR_HOUR_SECONDS 3600L
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#define PR_DAY_SECONDS (24L * PR_HOUR_SECONDS)
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#define PR_YEAR_SECONDS (PR_DAY_SECONDS * 365L)
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#define PR_MAX_UNIX_TIMET 2145859200L /*time_t value equiv. to 12/31/2037 */
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/* function prototypes */
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static void PR_basetime(int64 tsecs, PRTime *prtm);
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/*
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* get the difference in seconds between this time zone and UTC (GMT)
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*/
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PR_PUBLIC_API(time_t)
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PR_LocalGMTDifference()
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{
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#if defined(XP_UNIX) || defined(XP_PC)
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struct tm ltime;
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/* get the difference between this time zone and GMT */
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memset((char *)<ime,0,sizeof(ltime));
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ltime.tm_mday = 2;
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ltime.tm_year = 70;
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#ifdef SUNOS4
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ltime.tm_zone = 0;
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ltime.tm_gmtoff = 0;
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return timelocal(<ime) - (24 * 3600);
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#else
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return mktime(<ime) - (24L * 3600L);
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#endif
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#endif
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#if defined(XP_MAC)
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static time_t zone = -1L;
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MachineLocation machineLocation;
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uint64 gmtOffsetSeconds;
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uint64 gmtDelta;
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uint64 dlsOffset;
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int32 offset;
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/* difference has been set no need to recalculate */
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if(zone != -1)
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return zone;
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/* Get the information about the local machine, including
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* its GMT offset and its daylight savings time info.
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* Convert each into wides that we can add to
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* startupTimeMicroSeconds.
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*/
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MyReadLocation(&machineLocation);
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/* Mask off top eight bits of gmtDelta, sign extend lower three. */
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if ((machineLocation.u.gmtDelta & 0x00800000) != 0) {
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gmtOffsetSeconds.lo = (machineLocation.u.gmtDelta & 0x00FFFFFF) | 0xFF000000;
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gmtOffsetSeconds.hi = 0xFFFFFFFF;
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LL_UI2L(gmtDelta,0);
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} else {
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gmtOffsetSeconds.lo = (machineLocation.u.gmtDelta & 0x00FFFFFF);
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gmtOffsetSeconds.hi = 0;
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LL_UI2L(gmtDelta,PR_DAY_SECONDS);
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}
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/*
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* Normalize time to be positive if you are behind GMT. gmtDelta will
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* always be positive.
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*/
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LL_SUB(gmtDelta,gmtDelta,gmtOffsetSeconds);
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/* Is Daylight Savings On? If so, we need to add an hour to the offset. */
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if (machineLocation.u.dlsDelta != 0) {
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LL_UI2L(dlsOffset, PR_HOUR_SECONDS);
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} else {
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LL_I2L(dlsOffset, 0);
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}
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LL_ADD(gmtDelta,gmtDelta, dlsOffset);
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LL_L2I(offset,gmtDelta);
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zone = offset;
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return (time_t)offset;
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#endif
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}
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/* Constants for GMT offset from 1970 */
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#define G1970GMTMICROHI 0x00dcdcad /* micro secs to 1970 hi */
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#define G1970GMTMICROLOW 0x8b3fa000 /* micro secs to 1970 low */
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#define G2037GMTMICROHI 0x00e45fab /* micro secs to 2037 high */
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#define G2037GMTMICROLOW 0x7a238000 /* micro secs to 2037 low */
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/* Convert from base time to extended time */
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static int64
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PR_ToExtendedTime(int32 time)
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{
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int64 exttime;
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int64 g1970GMTMicroSeconds;
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int64 low;
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time_t diff;
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int64 tmp;
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int64 tmp1;
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diff = PR_LocalGMTDifference();
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LL_UI2L(tmp, PR_USEC_PER_SEC);
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LL_I2L(tmp1,diff);
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LL_MUL(tmp,tmp,tmp1);
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LL_UI2L(g1970GMTMicroSeconds,G1970GMTMICROHI);
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LL_UI2L(low,G1970GMTMICROLOW);
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#ifndef HAVE_LONG_LONG
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LL_SHL(g1970GMTMicroSeconds,g1970GMTMicroSeconds,16);
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LL_SHL(g1970GMTMicroSeconds,g1970GMTMicroSeconds,16);
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#else
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LL_SHL(g1970GMTMicroSeconds,g1970GMTMicroSeconds,32);
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#endif
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LL_ADD(g1970GMTMicroSeconds,g1970GMTMicroSeconds,low);
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LL_I2L(exttime,time);
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LL_ADD(exttime,exttime,g1970GMTMicroSeconds);
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LL_SUB(exttime,exttime,tmp);
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return exttime;
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}
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PR_PUBLIC_API(int64)
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PR_Now(void)
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{
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#ifdef XP_PC
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int64 s, us, ms2us, s2us;
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struct timeb b;
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#endif /* XP_PC */
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#ifdef XP_UNIX
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struct timeval tv;
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int64 s, us, s2us;
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#endif /* XP_UNIX */
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#ifdef XP_MAC
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UnsignedWide upTime;
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int64 localTime;
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int64 gmtOffset;
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int64 dstOffset;
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time_t gmtDiff;
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int64 s2us;
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#endif /* XP_MAC */
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#ifdef XP_PC
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ftime(&b);
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LL_UI2L(ms2us, PR_USEC_PER_MSEC);
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LL_UI2L(s2us, PR_USEC_PER_SEC);
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LL_UI2L(s, b.time);
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LL_UI2L(us, b.millitm);
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LL_MUL(us, us, ms2us);
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LL_MUL(s, s, s2us);
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LL_ADD(s, s, us);
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return s;
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#endif
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#ifdef XP_UNIX
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#if defined(SOLARIS)
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gettimeofday(&tv);
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#else
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gettimeofday(&tv, 0);
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#endif /* SOLARIS */
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LL_UI2L(s2us, PR_USEC_PER_SEC);
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LL_UI2L(s, tv.tv_sec);
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LL_UI2L(us, tv.tv_usec);
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LL_MUL(s, s, s2us);
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LL_ADD(s, s, us);
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return s;
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#endif /* XP_UNIX */
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#ifdef XP_MAC
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LL_UI2L(localTime,0);
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gmtDiff = PR_LocalGMTDifference();
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LL_I2L(gmtOffset,gmtDiff);
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LL_UI2L(s2us, PR_USEC_PER_SEC);
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LL_MUL(gmtOffset,gmtOffset,s2us);
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LL_UI2L(dstOffset,0);
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dstOffset = PR_DSTOffset(dstOffset);
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LL_SUB(gmtOffset,gmtOffset,dstOffset);
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/* don't adjust for DST since it sets ctime and gmtime off on the MAC */
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Microseconds(&upTime);
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LL_ADD(localTime,localTime,gmtOffset);
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LL_ADD(localTime,localTime, *((uint64 *)&dstLocalBaseMicroseconds));
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LL_ADD(localTime,localTime, *((uint64 *)&upTime));
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return *((uint64 *)&localTime);
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#endif /* XP_MAC */
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}
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/* Get the DST timezone offset for the time passed in
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*/
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PR_PUBLIC_API(int64)
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PR_DSTOffset(int64 time)
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{
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int64 us2s;
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#ifdef XP_MAC
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MachineLocation machineLocation;
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int64 dlsOffset;
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/*
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* Get the information about the local machine, including
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* its GMT offset and its daylight savings time info.
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* Convert each into wides that we can add to
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* startupTimeMicroSeconds.
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*/
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MyReadLocation(&machineLocation);
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/* Is Daylight Savings On? If so, we need to add an hour to the offset. */
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if (machineLocation.u.dlsDelta != 0) {
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LL_UI2L(us2s, PR_USEC_PER_SEC); /* seconds in a microseconds */
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LL_UI2L(dlsOffset, PR_HOUR_SECONDS); /* seconds in one hour */
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LL_MUL(dlsOffset, dlsOffset, us2s);
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} else {
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LL_I2L(dlsOffset, 0);
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}
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return(dlsOffset);
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#else /* XP_PC || XP_UNIX */
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time_t local;
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int32 diff;
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int64 maxtimet;
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struct tm tm;
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PRTime prtm;
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#if defined( XP_PC ) || defined( FREEBSD ) || defined ( HPUX9 ) || defined ( SNI )
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struct tm *ptm;
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#endif
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LL_UI2L(us2s, PR_USEC_PER_SEC);
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LL_DIV(time, time, us2s);
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/* get the maximum of time_t value */
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LL_UI2L(maxtimet,PR_MAX_UNIX_TIMET);
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if (LL_CMP(time,>,maxtimet)) {
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LL_UI2L(time,PR_MAX_UNIX_TIMET);
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} else if (!LL_GE_ZERO(time) || LL_IS_ZERO(time)) {
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/* go ahead a day to make localtime work (does not work with 0) */
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LL_UI2L(time,PR_DAY_SECONDS);
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}
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LL_L2UI(local,time);
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PR_basetime(time,&prtm);
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#if defined( XP_PC ) || defined( FREEBSD ) || defined ( HPUX9 ) || defined ( SNI )
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ptm = localtime(&local);
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if (!ptm)
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return LL_ZERO;
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tm = *ptm;
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#else
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localtime_r(&local,&tm); /* get dst information */
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#endif
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diff = ((tm.tm_hour - prtm.tm_hour) * PR_HOUR_SECONDS)
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+ ((tm.tm_min - prtm.tm_min) * 60);
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if (diff < 0)
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diff += PR_DAY_SECONDS;
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LL_UI2L(time,diff);
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LL_MUL(time,time,us2s);
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return(time);
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#endif /* XP_PC || XP_UNIX */
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}
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/* Format a time value into a buffer. Same semantics as strftime() */
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PR_PUBLIC_API(size_t)
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PR_FormatTime(char *buf, int buflen, char *fmt, PRTime *prtm)
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{
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#if defined(XP_UNIX) || defined(XP_PC) || defined(XP_MAC)
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struct tm a;
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/* Zero out the tm struct. Linux, SunOS 4 struct tm has extra members int
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* tm_gmtoff, char *tm_zone; when tm_zone is garbage, strftime gets
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* confused and dumps core. NSPR20 prtime.c attempts to fill these in by
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* calling mktime on the partially filled struct, but this doesn't seem to
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* work as well; the result string has "can't get timezone" for ECMA-valid
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* years. Might still make sense to use this, but find the range of years
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* for which valid tz information exists, and map (per ECMA hint) from the
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* given year into that range.
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* N.B. This hasn't been tested with anything that actually _uses_
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* tm_gmtoff; zero might be the wrong thing to set it to if you really need
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* to format a time. This fix is for jsdate.c, which only uses
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* PR_FormatTime to get a string representing the time zone. */
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memset(&a, 0, sizeof(struct tm));
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a.tm_sec = prtm->tm_sec;
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a.tm_min = prtm->tm_min;
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a.tm_hour = prtm->tm_hour;
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a.tm_mday = prtm->tm_mday;
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a.tm_mon = prtm->tm_mon;
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a.tm_wday = prtm->tm_wday;
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a.tm_year = prtm->tm_year - 1900;
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a.tm_yday = prtm->tm_yday;
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a.tm_isdst = prtm->tm_isdst;
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/* Even with the above, SunOS 4 seems to detonate if tm_zone and tm_gmtoff
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* are null. This doesn't quite work, though - the timezone is off by
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* tzoff + dst. (And mktime seems to return -1 for the exact dst
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* changeover time.)
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* Still not sure if MKLINUX is necessary; this is borrowed from the NSPR20
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* prtime.c. I'm leaving it out - My Linux does the right thing without it
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* (and the wrong thing with it) even though it has the tm_gmtoff, tm_zone
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* fields. Linux seems to be happy so long as the tm struct is zeroed out.
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* The #ifdef in nspr is:
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* #if defined(SUNOS4) || defined(MKLINUX) || defined (__GLIBC >= 2)
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*/
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#if defined(SUNOS4)
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if (mktime(&a) == -1) {
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/* Seems to fail whenever the requested date is outside of the 32-bit
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* UNIX epoch. We could proceed at this point (setting a.tm_zone to
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* "") but then strftime returns a string with a 2-digit field of
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* garbage for the year. So we return 0 and hope jsdate.c
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* will fall back on toString.
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*/
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return 0;
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}
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#endif
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return strftime(buf, buflen, fmt, &a);
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#endif
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}
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/* table for number of days in a month */
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static int mtab[] = {
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/* jan, feb,mar,apr,may,jun */
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31,28,31,30,31,30,
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/* july,aug,sep,oct,nov,dec */
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31,31,30,31,30,31
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};
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/*
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* basic time calculation functionality for localtime and gmtime
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* setups up prtm argument with correct values based upon input number
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* of seconds.
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*/
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static void
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PR_basetime(int64 tsecs, PRTime *prtm)
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{
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/* convert tsecs back to year,month,day,hour,secs */
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int32 year = 0;
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int32 month = 0;
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int32 yday = 0;
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int32 mday = 0;
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int32 wday = 6; /* start on a Sunday */
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int32 days = 0;
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int32 seconds = 0;
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int32 minutes = 0;
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int32 hours = 0;
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int32 isleap = 0;
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int64 result;
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int64 result1;
|
|
int64 result2;
|
|
int64 base;
|
|
|
|
LL_UI2L(result,0);
|
|
LL_UI2L(result1,0);
|
|
LL_UI2L(result2,0);
|
|
|
|
/* get the base time via UTC */
|
|
base = PR_ToExtendedTime(0);
|
|
LL_UI2L(result, PR_USEC_PER_SEC);
|
|
LL_DIV(base,base,result);
|
|
LL_ADD(tsecs,tsecs,base);
|
|
|
|
LL_UI2L(result, PR_YEAR_SECONDS);
|
|
LL_UI2L(result1,PR_DAY_SECONDS);
|
|
LL_ADD(result2,result,result1);
|
|
|
|
/* get the year */
|
|
while ((isleap == 0) ? !LL_CMP(tsecs,<,result) : !LL_CMP(tsecs,<,result2)) {
|
|
/* subtract a year from tsecs */
|
|
LL_SUB(tsecs,tsecs,result);
|
|
days += 365;
|
|
/* is it a leap year ? */
|
|
if(IS_LEAP(year)){
|
|
LL_SUB(tsecs,tsecs,result1);
|
|
days++;
|
|
}
|
|
year++;
|
|
isleap = IS_LEAP(year);
|
|
}
|
|
|
|
LL_UI2L(result1,PR_DAY_SECONDS);
|
|
|
|
LL_DIV(result,tsecs,result1);
|
|
LL_L2I(mday,result);
|
|
|
|
/* let's find the month */
|
|
while(((month == 1 && isleap) ?
|
|
(mday >= mtab[month] + 1) :
|
|
(mday >= mtab[month]))){
|
|
yday += mtab[month];
|
|
days += mtab[month];
|
|
|
|
mday -= mtab[month];
|
|
|
|
/* it's a Feb, check if this is a leap year */
|
|
if(month == 1 && isleap != 0){
|
|
yday++;
|
|
days++;
|
|
mday--;
|
|
}
|
|
month++;
|
|
}
|
|
|
|
/* now adjust tsecs */
|
|
LL_MUL(result,result,result1);
|
|
LL_SUB(tsecs,tsecs,result);
|
|
|
|
mday++; /* day of month always start with 1 */
|
|
days += mday;
|
|
wday = (days + wday) % 7;
|
|
|
|
yday += mday;
|
|
|
|
/* get the hours */
|
|
LL_UI2L(result1,PR_HOUR_SECONDS);
|
|
LL_DIV(result,tsecs,result1);
|
|
LL_L2I(hours,result);
|
|
LL_MUL(result,result,result1);
|
|
LL_SUB(tsecs,tsecs,result);
|
|
|
|
/* get minutes */
|
|
LL_UI2L(result1,60);
|
|
LL_DIV(result,tsecs,result1);
|
|
LL_L2I(minutes,result);
|
|
LL_MUL(result,result,result1);
|
|
LL_SUB(tsecs,tsecs,result);
|
|
|
|
LL_L2I(seconds,tsecs);
|
|
|
|
prtm->tm_usec = 0L;
|
|
prtm->tm_sec = (int8)seconds;
|
|
prtm->tm_min = (int8)minutes;
|
|
prtm->tm_hour = (int8)hours;
|
|
prtm->tm_mday = (int8)mday;
|
|
prtm->tm_mon = (int8)month;
|
|
prtm->tm_wday = (int8)wday;
|
|
prtm->tm_year = (int16)year;
|
|
prtm->tm_yday = (int16)yday;
|
|
}
|