/* Convert from base time to extended time */
static JSInt64
PRMJ_ToExtendedTime(JSInt32 base_time)
{
JSInt64 exttime;
JSInt64 g1970GMTMicroSeconds;
JSInt64 low;
JSInt32 diff;
JSInt64 tmp;
JSInt64 tmp1;
diff = PRMJ_LocalGMTDifference();
JSLL_UI2L(tmp, PRMJ_USEC_PER_SEC);
JSLL_I2L(tmp1,diff);
JSLL_MUL(tmp,tmp,tmp1);
JSLL_UI2L(g1970GMTMicroSeconds,G1970GMTMICROHI);
JSLL_UI2L(low,G1970GMTMICROLOW);
#ifndef JS_HAVE_LONG_LONG
JSLL_SHL(g1970GMTMicroSeconds,g1970GMTMicroSeconds,16);
JSLL_SHL(g1970GMTMicroSeconds,g1970GMTMicroSeconds,16);
#else
JSLL_SHL(g1970GMTMicroSeconds,g1970GMTMicroSeconds,32);
#endif
JSLL_ADD(g1970GMTMicroSeconds,g1970GMTMicroSeconds,low);
JSLL_I2L(exttime,base_time);
JSLL_ADD(exttime,exttime,g1970GMTMicroSeconds);
JSLL_SUB(exttime,exttime,tmp);
return exttime;
}
static void
random_init(JSRuntime *rt)
{
int64 tmp, tmp2;
/* Do at most once. */
if (rt->rngInitialized)
return;
rt->rngInitialized = JS_TRUE;
/* rt->rngMultiplier = 0x5DEECE66DL */
JSLL_ISHL(tmp, 0x5, 32);
JSLL_UI2L(tmp2, 0xDEECE66DL);
JSLL_OR(rt->rngMultiplier, tmp, tmp2);
/* rt->rngAddend = 0xBL */
JSLL_I2L(rt->rngAddend, 0xBL);
/* rt->rngMask = (1L << 48) - 1 */
JSLL_I2L(tmp, 1);
JSLL_SHL(tmp2, tmp, 48);
JSLL_SUB(rt->rngMask, tmp2, tmp);
/* rt->rngDscale = (jsdouble)(1L << 53) */
JSLL_SHL(tmp2, tmp, 53);
JSLL_L2D(rt->rngDscale, tmp2);
/* Finally, set the seed from current time. */
random_setSeed(rt, PRMJ_Now());
}
static void MacintoshInitializeTime(void)
{
uint64 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((UnsignedWide*)&upTime);
GetDateTime(¤tLocalTimeSeconds);
JSLL_I2L(microSecondsToSeconds, PRMJ_USEC_PER_SEC);
JSLL_DIV(upTimeSecondsLong, upTime, microSecondsToSeconds);
JSLL_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.
*/
JSLL_I2L(startupTimeMicroSeconds, startupTimeSeconds);
JSLL_I2L(oneMillion, PRMJ_USEC_PER_SEC);
JSLL_MUL(dstLocalBaseMicroseconds, oneMillion, startupTimeMicroSeconds);
}
/*
* Math.random() support, lifted from java.util.Random.java.
*/
static void
random_setSeed(JSRuntime *rt, int64 seed)
{
int64 tmp;
JSLL_I2L(tmp, 1000);
JSLL_DIV(seed, seed, tmp);
JSLL_XOR(tmp, seed, rt->rngMultiplier);
JSLL_AND(rt->rngSeed, tmp, rt->rngMask);
}
JSInt64
PRMJ_Now(void)
{
#ifdef XP_OS2
JSInt64 s, us, ms2us, s2us;
struct timeb b;
#endif
#ifdef XP_WIN
JSInt64 s, us,
win2un = JSLL_INIT(0x19DB1DE, 0xD53E8000),
ten = JSLL_INIT(0, 10);
FILETIME time, midnight;
#endif
#if defined(XP_UNIX) || defined(XP_BEOS)
struct timeval tv;
JSInt64 s, us, s2us;
#endif /* XP_UNIX */
#ifdef XP_MAC
JSUint64 upTime;
JSInt64 localTime;
JSInt64 gmtOffset;
JSInt64 dstOffset;
JSInt32 gmtDiff;
JSInt64 s2us;
#endif /* XP_MAC */
#ifdef XP_OS2
ftime(&b);
JSLL_UI2L(ms2us, PRMJ_USEC_PER_MSEC);
JSLL_UI2L(s2us, PRMJ_USEC_PER_SEC);
JSLL_UI2L(s, b.time);
JSLL_UI2L(us, b.millitm);
JSLL_MUL(us, us, ms2us);
JSLL_MUL(s, s, s2us);
JSLL_ADD(s, s, us);
return s;
#endif
#ifdef XP_WIN
/* The windows epoch is around 1600. The unix epoch is around 1970.
win2un is the difference (in windows time units which are 10 times
more precise than the JS time unit) */
GetSystemTimeAsFileTime(&time);
/* Win9x gets confused at midnight
http://support.microsoft.com/default.aspx?scid=KB;en-us;q224423
So if the low part (precision <8mins) is 0 then we get the time
again. */
if (!time.dwLowDateTime) {
GetSystemTimeAsFileTime(&midnight);
time.dwHighDateTime = midnight.dwHighDateTime;
}
JSLL_UI2L(s, time.dwHighDateTime);
JSLL_UI2L(us, time.dwLowDateTime);
JSLL_SHL(s, s, 32);
JSLL_ADD(s, s, us);
JSLL_SUB(s, s, win2un);
JSLL_DIV(s, s, ten);
return s;
#endif
#if defined(XP_UNIX) || defined(XP_BEOS)
#ifdef _SVID_GETTOD /* Defined only on Solaris, see Solaris <sys/types.h> */
gettimeofday(&tv);
#else
gettimeofday(&tv, 0);
#endif /* _SVID_GETTOD */
JSLL_UI2L(s2us, PRMJ_USEC_PER_SEC);
JSLL_UI2L(s, tv.tv_sec);
JSLL_UI2L(us, tv.tv_usec);
JSLL_MUL(s, s, s2us);
JSLL_ADD(s, s, us);
return s;
#endif /* XP_UNIX */
#ifdef XP_MAC
JSLL_UI2L(localTime,0);
gmtDiff = PRMJ_LocalGMTDifference();
JSLL_I2L(gmtOffset,gmtDiff);
JSLL_UI2L(s2us, PRMJ_USEC_PER_SEC);
JSLL_MUL(gmtOffset,gmtOffset,s2us);
/* don't adjust for DST since it sets ctime and gmtime off on the MAC */
Microseconds((UnsignedWide*)&upTime);
JSLL_ADD(localTime,localTime,gmtOffset);
JSLL_ADD(localTime,localTime, dstLocalBaseMicroseconds);
JSLL_ADD(localTime,localTime, upTime);
dstOffset = PRMJ_DSTOffset(localTime);
JSLL_SUB(localTime,localTime,dstOffset);
return *((JSUint64 *)&localTime);
#endif /* XP_MAC */
}
