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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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
/* PR time code. */
#include "vm/Time.h"
#ifdef SOLARIS
# define _REENTRANT 1
#endif
#include <string.h>
#include <time.h>
#include "jstypes.h"
#ifdef XP_WIN
# include <windef.h>
# include <winbase.h>
# include <crtdbg.h> /* for _CrtSetReportMode */
# include <stdlib.h> /* for _set_invalid_parameter_handler */
#endif
#ifdef XP_UNIX
# ifdef _SVID_GETTOD /* Defined only on Solaris, see Solaris <sys/types.h> */
extern int gettimeofday(struct timeval* tv);
# endif
# include <sys/time.h>
#endif /* XP_UNIX */
#if defined(XP_UNIX)
int64_t PRMJ_Now() {
struct timeval tv;
# ifdef _SVID_GETTOD /* Defined only on Solaris, see Solaris <sys/types.h> */
gettimeofday(&tv);
# else
gettimeofday(&tv, 0);
# endif /* _SVID_GETTOD */
return int64_t(tv.tv_sec) * PRMJ_USEC_PER_SEC + int64_t(tv.tv_usec);
}
#else
// Returns the number of microseconds since the Unix epoch.
static int64_t FileTimeToUnixMicroseconds(const FILETIME& ft) {
// Get the time in 100ns intervals.
int64_t t = (int64_t(ft.dwHighDateTime) << 32) | int64_t(ft.dwLowDateTime);
// The Windows epoch is around 1600. The Unix epoch is around 1970.
// Subtract the difference.
static const int64_t TimeToEpochIn100ns = 0x19DB1DED53E8000;
t -= TimeToEpochIn100ns;
// Divide by 10 to convert to microseconds.
return t / 10;
}
int64_t PRMJ_Now() {
FILETIME ft;
GetSystemTimePreciseAsFileTime(&ft);
return FileTimeToUnixMicroseconds(ft);
}
#endif
#if !JS_HAS_INTL_API
# ifdef XP_WIN
static void PRMJ_InvalidParameterHandler(const wchar_t* expression,
const wchar_t* function,
const wchar_t* file, unsigned int line,
uintptr_t pReserved) {
/* empty */
}
# endif
/* Format a time value into a buffer. Same semantics as strftime() */
size_t PRMJ_FormatTime(char* buf, size_t buflen, const char* fmt,
const PRMJTime* prtm, int timeZoneYear,
int offsetInSeconds) {
size_t result = 0;
# if defined(XP_UNIX) || defined(XP_WIN)
struct tm a;
# ifdef XP_WIN
_invalid_parameter_handler oldHandler;
# ifndef __MINGW32__
int oldReportMode;
# endif // __MINGW32__
# endif // XP_WIN
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;
/*
* On systems where |struct tm| has members tm_gmtoff and tm_zone, we
* must fill in those values, or else strftime will return wrong results
*/
# if defined(HAVE_LOCALTIME_R) && defined(HAVE_TM_ZONE_TM_GMTOFF)
char emptyTimeZoneId[] = "";
{
/*
* Fill out |td| to the time represented by |prtm|, leaving the
* timezone fields zeroed out. localtime_r will then fill in the
* timezone fields for that local time according to the system's
* timezone parameters. Use |timeZoneYear| for the year to ensure the
* time zone name matches the time zone offset used by the caller.
*/
struct tm td;
memset(&td, 0, sizeof(td));
td.tm_sec = prtm->tm_sec;
td.tm_min = prtm->tm_min;
td.tm_hour = prtm->tm_hour;
td.tm_mday = prtm->tm_mday;
td.tm_mon = prtm->tm_mon;
td.tm_wday = prtm->tm_wday;
td.tm_year = timeZoneYear - 1900;
td.tm_yday = prtm->tm_yday;
td.tm_isdst = prtm->tm_isdst;
time_t t = mktime(&td);
// If either mktime or localtime_r failed, fill in the fallback time
// zone offset |offsetInSeconds| and set the time zone identifier to
// the empty string.
if (t != static_cast<time_t>(-1) && localtime_r(&t, &td)) {
a.tm_gmtoff = td.tm_gmtoff;
a.tm_zone = td.tm_zone;
} else {
a.tm_gmtoff = offsetInSeconds;
a.tm_zone = emptyTimeZoneId;
}
}
# endif
/*
* Years before 1900 and after 9999 cause strftime() to abort on Windows.
* To avoid that we replace it with FAKE_YEAR_BASE + year % 100 and then
* replace matching substrings in the strftime() result with the real year.
* Note that FAKE_YEAR_BASE should be a multiple of 100 to make 2-digit
* year formats (%y) work correctly (since we won't find the fake year
* in that case).
*/
constexpr int FAKE_YEAR_BASE = 9900;
int fake_tm_year = 0;
if (prtm->tm_year < 1900 || prtm->tm_year > 9999) {
fake_tm_year = FAKE_YEAR_BASE + prtm->tm_year % 100;
a.tm_year = fake_tm_year - 1900;
} else {
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.)
*/
# ifdef XP_WIN
oldHandler = _set_invalid_parameter_handler(PRMJ_InvalidParameterHandler);
# ifndef __MINGW32__
/*
* MinGW doesn't have _CrtSetReportMode and defines it to be a no-op.
* We ifdef it off to avoid warnings about unused variables
*/
oldReportMode = _CrtSetReportMode(_CRT_ASSERT, 0);
# endif // __MINGW32__
# endif // XP_WIN
result = strftime(buf, buflen, fmt, &a);
# ifdef XP_WIN
_set_invalid_parameter_handler(oldHandler);
# ifndef __MINGW32__
_CrtSetReportMode(_CRT_ASSERT, oldReportMode);
# endif // __MINGW32__
# endif // XP_WIN
if (fake_tm_year && result) {
char real_year[16];
char fake_year[16];
size_t real_year_len;
size_t fake_year_len;
char* p;
sprintf(real_year, "%d", prtm->tm_year);
real_year_len = strlen(real_year);
sprintf(fake_year, "%d", fake_tm_year);
fake_year_len = strlen(fake_year);
/* Replace the fake year in the result with the real year. */
for (p = buf; (p = strstr(p, fake_year)); p += real_year_len) {
size_t new_result = result + real_year_len - fake_year_len;
if (new_result >= buflen) {
return 0;
}
memmove(p + real_year_len, p + fake_year_len, strlen(p + fake_year_len));
memcpy(p, real_year, real_year_len);
result = new_result;
*(buf + result) = '\0';
}
}
# endif
return result;
}
#endif /* !JS_HAS_INTL_API */