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