* other provisions required by the MPL or the GPL, as the case may be.
* If you do not delete the provisions above, a recipient may use your
* version of this file under any of the LGPL, the MPL or the GPL.
+
+ * Copyright 2006-2008 the V8 project authors. All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <errno.h>
#endif
-#if PLATFORM(DARWIN)
-#include <notify.h>
+#if OS(WINCE)
+extern "C" size_t strftime(char * const s, const size_t maxsize, const char * const format, const struct tm * const t);
+extern "C" struct tm * localtime(const time_t *timer);
#endif
#if HAVE(SYS_TIME_H)
#include <sys/timeb.h>
#endif
+#if USE(JSC)
+#include "CallFrame.h"
+#endif
+
#define NaN std::numeric_limits<double>::quiet_NaN()
+using namespace WTF;
+
namespace WTF {
/* Constants */
static const double usecPerSec = 1000000.0;
static const double maxUnixTime = 2145859200.0; // 12/31/2037
+// ECMAScript asks not to support for a date of which total
+// millisecond value is larger than the following value.
+// See 15.9.1.14 of ECMA-262 5th edition.
+static const double maxECMAScriptTime = 8.64E15;
// Day of year for the first day of each month, where index 0 is January, and day 0 is January 1.
// First for non-leap years, then for leap years.
return floor(ms / msPerDay);
}
-static inline int msToYear(double ms)
+int msToYear(double ms)
{
int approxYear = static_cast<int>(floor(ms / (msPerDay * 365.2425)) + 1970);
double msFromApproxYearTo1970 = msPerDay * daysFrom1970ToYear(approxYear);
return approxYear;
}
-static inline int dayInYear(double ms, int year)
+int dayInYear(double ms, int year)
{
return static_cast<int>(msToDays(ms) - daysFrom1970ToYear(year));
}
return static_cast<int>(result);
}
-static inline int monthFromDayInYear(int dayInYear, bool leapYear)
+int monthFromDayInYear(int dayInYear, bool leapYear)
{
const int d = dayInYear;
int step;
return (dayInYear <= startDayOfNextMonth);
}
-static inline int dayInMonthFromDayInYear(int dayInYear, bool leapYear)
+int dayInMonthFromDayInYear(int dayInYear, bool leapYear)
{
const int d = dayInYear;
int step;
return (((hour * minutesPerHour + min) * secondsPerMinute + sec) * msPerSecond + ms);
}
-static int dateToDayInYear(int year, int month, int day)
+double dateToDaysFrom1970(int year, int month, int day)
{
year += month / 12;
--year;
}
- int yearday = static_cast<int>(floor(daysFrom1970ToYear(year)));
+ double yearday = floor(daysFrom1970ToYear(year));
+ ASSERT((year >= 1970 && yearday >= 0) || (year < 1970 && yearday < 0));
int monthday = monthToDayInYear(month, isLeapYear(year));
return yearday + monthday + day - 1;
}
-double getCurrentUTCTime()
-{
- return floor(getCurrentUTCTimeWithMicroseconds());
-}
-
-// Returns current time in milliseconds since 1 Jan 1970.
-double getCurrentUTCTimeWithMicroseconds()
-{
- return currentTime() * 1000.0;
-}
-
-void getLocalTime(const time_t* localTime, struct tm* localTM)
-{
-#if COMPILER(MSVC7) || COMPILER(MINGW) || PLATFORM(WINCE)
- *localTM = *localtime(localTime);
-#elif COMPILER(MSVC)
- localtime_s(localTM, localTime);
-#else
- localtime_r(localTime, localTM);
-#endif
-}
-
// There is a hard limit at 2038 that we currently do not have a workaround
// for (rdar://problem/5052975).
static inline int maximumYearForDST()
// greater than the max year minus 27 (2010), we want to use the max year
// minus 27 instead, to ensure there is a range of 28 years that all years
// can map to.
- return std::min(msToYear(getCurrentUTCTime()), maximumYearForDST() - 27) ;
+ return std::min(msToYear(jsCurrentTime()), maximumYearForDST() - 27) ;
}
/*
static int32_t calculateUTCOffset()
{
+#if PLATFORM(BREWMP)
+ time_t localTime = static_cast<time_t>(currentTime());
+#else
time_t localTime = time(0);
+#endif
tm localt;
getLocalTime(&localTime, &localt);
localt.tm_wday = 0;
localt.tm_yday = 0;
localt.tm_isdst = 0;
-#if PLATFORM(WIN_OS) || PLATFORM(SOLARIS) || COMPILER(RVCT)
+#if HAVE(TM_GMTOFF)
+ localt.tm_gmtoff = 0;
+#endif
+#if HAVE(TM_ZONE)
+ localt.tm_zone = 0;
+#endif
+
+#if HAVE(TIMEGM)
+ time_t utcOffset = timegm(&localt) - mktime(&localt);
+#else
// Using a canned date of 01/01/2009 on platforms with weaker date-handling foo.
localt.tm_year = 109;
time_t utcOffset = 1230768000 - mktime(&localt);
-#else
- localt.tm_zone = 0;
- localt.tm_gmtoff = 0;
- time_t utcOffset = timegm(&localt) - mktime(&localt);
#endif
return static_cast<int32_t>(utcOffset * 1000);
}
-#if PLATFORM(DARWIN)
-static int32_t s_cachedUTCOffset; // In milliseconds. An assumption here is that access to an int32_t variable is atomic on platforms that take this code path.
-static bool s_haveCachedUTCOffset;
-static int s_notificationToken;
-#endif
-
-/*
- * Get the difference in milliseconds between this time zone and UTC (GMT)
- * NOT including DST.
- */
-double getUTCOffset()
-{
-#if PLATFORM(DARWIN)
- if (s_haveCachedUTCOffset) {
- int notified;
- uint32_t status = notify_check(s_notificationToken, ¬ified);
- if (status == NOTIFY_STATUS_OK && !notified)
- return s_cachedUTCOffset;
- }
-#endif
-
- int32_t utcOffset = calculateUTCOffset();
-
-#if PLATFORM(DARWIN)
- // Theoretically, it is possible that several threads will be executing this code at once, in which case we will have a race condition,
- // and a newer value may be overwritten. In practice, time zones don't change that often.
- s_cachedUTCOffset = utcOffset;
-#endif
-
- return utcOffset;
-}
-
/*
- * Get the DST offset for the time passed in. Takes
- * seconds (not milliseconds) and cannot handle dates before 1970
- * on some OS'
+ * Get the DST offset for the time passed in.
*/
-static double getDSTOffsetSimple(double localTimeSeconds, double utcOffset)
+static double calculateDSTOffsetSimple(double localTimeSeconds, double utcOffset)
{
if (localTimeSeconds > maxUnixTime)
localTimeSeconds = maxUnixTime;
}
// Get the DST offset, given a time in UTC
-static double getDSTOffset(double ms, double utcOffset)
+static double calculateDSTOffset(double ms, double utcOffset)
{
- // On Mac OS X, the call to localtime (see getDSTOffsetSimple) will return historically accurate
+ // On Mac OS X, the call to localtime (see calculateDSTOffsetSimple) will return historically accurate
// DST information (e.g. New Zealand did not have DST from 1946 to 1974) however the JavaScript
// standard explicitly dictates that historical information should not be considered when
// determining DST. For this reason we shift away from years that localtime can handle but would
int dayInYearLocal = dayInYear(ms, year);
int dayInMonth = dayInMonthFromDayInYear(dayInYearLocal, leapYear);
int month = monthFromDayInYear(dayInYearLocal, leapYear);
- int day = dateToDayInYear(equivalentYear, month, dayInMonth);
+ double day = dateToDaysFrom1970(equivalentYear, month, dayInMonth);
ms = (day * msPerDay) + msToMilliseconds(ms);
}
- return getDSTOffsetSimple(ms / msPerSecond, utcOffset);
-}
-
-double gregorianDateTimeToMS(const GregorianDateTime& t, double milliSeconds, bool inputIsUTC)
-{
- int day = dateToDayInYear(t.year + 1900, t.month, t.monthDay);
- double ms = timeToMS(t.hour, t.minute, t.second, milliSeconds);
- double result = (day * msPerDay) + ms;
-
- if (!inputIsUTC) { // convert to UTC
- double utcOffset = getUTCOffset();
- result -= utcOffset;
- result -= getDSTOffset(result, utcOffset);
- }
-
- return result;
-}
-
-void msToGregorianDateTime(double ms, bool outputIsUTC, GregorianDateTime& tm)
-{
- // input is UTC
- double dstOff = 0.0;
- const double utcOff = getUTCOffset();
-
- if (!outputIsUTC) { // convert to local time
- dstOff = getDSTOffset(ms, utcOff);
- ms += dstOff + utcOff;
- }
-
- const int year = msToYear(ms);
- tm.second = msToSeconds(ms);
- tm.minute = msToMinutes(ms);
- tm.hour = msToHours(ms);
- tm.weekDay = msToWeekDay(ms);
- tm.yearDay = dayInYear(ms, year);
- tm.monthDay = dayInMonthFromDayInYear(tm.yearDay, isLeapYear(year));
- tm.month = monthFromDayInYear(tm.yearDay, isLeapYear(year));
- tm.year = year - 1900;
- tm.isDST = dstOff != 0.0;
-
- tm.utcOffset = outputIsUTC ? 0 : static_cast<long>((dstOff + utcOff) / msPerSecond);
- tm.timeZone = NULL;
+ return calculateDSTOffsetSimple(ms / msPerSecond, utcOffset);
}
void initializeDates()
{
#ifndef NDEBUG
static bool alreadyInitialized;
- ASSERT(!alreadyInitialized++);
+ ASSERT(!alreadyInitialized);
+ alreadyInitialized = true;
#endif
equivalentYearForDST(2000); // Need to call once to initialize a static used in this function.
-#if PLATFORM(DARWIN)
- // Register for a notification whenever the time zone changes.
- uint32_t status = notify_register_check("com.apple.system.timezone", &s_notificationToken);
- if (status == NOTIFY_STATUS_OK) {
- s_cachedUTCOffset = calculateUTCOffset();
- s_haveCachedUTCOffset = true;
- }
-#endif
}
static inline double ymdhmsToSeconds(long year, int mon, int day, int hour, int minute, int second)
// We follow the recommendation of RFC 2822 to consider all
// obsolete time zones not listed here equivalent to "-0000".
static const struct KnownZone {
-#if !PLATFORM(WIN_OS)
+#if !OS(WINDOWS)
const
#endif
char tzName[4];
return true;
}
-double parseDateFromNullTerminatedCharacters(const char* dateString)
+// Odd case where 'exec' is allowed to be 0, to accomodate a caller in WebCore.
+static double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveTZ, int& offset)
{
+ haveTZ = false;
+ offset = 0;
+
// This parses a date in the form:
// Tuesday, 09-Nov-99 23:12:40 GMT
// or
}
}
- bool haveTZ = false;
- int offset = 0;
-
// Don't fail if the time zone is missing.
// Some websites omit the time zone (4275206).
if (*dateString) {
return NaN;
int sgn = (o < 0) ? -1 : 1;
- o = abs(o);
+ o = labs(o);
if (*dateString != ':') {
offset = ((o / 100) * 60 + (o % 100)) * sgn;
} else { // GMT+05:00
else
year += 1900;
}
+
+ return ymdhmsToSeconds(year, month + 1, day, hour, minute, second) * msPerSecond;
+}
+
+double parseDateFromNullTerminatedCharacters(const char* dateString)
+{
+ bool haveTZ;
+ int offset;
+ double ms = parseDateFromNullTerminatedCharacters(dateString, haveTZ, offset);
+ if (isnan(ms))
+ return NaN;
// fall back to local timezone
if (!haveTZ) {
- GregorianDateTime t;
- t.monthDay = day;
- t.month = month;
- t.year = year - 1900;
- t.isDST = -1;
- t.second = second;
- t.minute = minute;
- t.hour = hour;
-
- // Use our gregorianDateTimeToMS() rather than mktime() as the latter can't handle the full year range.
- return gregorianDateTimeToMS(t, 0, false);
+ double utcOffset = calculateUTCOffset();
+ double dstOffset = calculateDSTOffset(ms, utcOffset);
+ offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);
}
-
- return (ymdhmsToSeconds(year, month + 1, day, hour, minute, second) - (offset * 60.0)) * msPerSecond;
+ return ms - (offset * msPerMinute);
}
double timeClip(double t)
{
if (!isfinite(t))
return NaN;
- if (fabs(t) > 8.64E15)
+ if (fabs(t) > maxECMAScriptTime)
return NaN;
return trunc(t);
}
+} // namespace WTF
+
+#if USE(JSC)
+namespace JSC {
+
+// Get the DST offset for the time passed in.
+//
+// NOTE: The implementation relies on the fact that no time zones have
+// more than one daylight savings offset change per month.
+// If this function is called with NaN it returns NaN.
+static double getDSTOffset(ExecState* exec, double ms, double utcOffset)
+{
+ DSTOffsetCache& cache = exec->globalData().dstOffsetCache;
+ double start = cache.start;
+ double end = cache.end;
+
+ if (start <= ms) {
+ // If the time fits in the cached interval, return the cached offset.
+ if (ms <= end) return cache.offset;
+
+ // Compute a possible new interval end.
+ double newEnd = end + cache.increment;
+
+ if (ms <= newEnd) {
+ double endOffset = calculateDSTOffset(newEnd, utcOffset);
+ if (cache.offset == endOffset) {
+ // If the offset at the end of the new interval still matches
+ // the offset in the cache, we grow the cached time interval
+ // and return the offset.
+ cache.end = newEnd;
+ cache.increment = msPerMonth;
+ return endOffset;
+ } else {
+ double offset = calculateDSTOffset(ms, utcOffset);
+ if (offset == endOffset) {
+ // The offset at the given time is equal to the offset at the
+ // new end of the interval, so that means that we've just skipped
+ // the point in time where the DST offset change occurred. Updated
+ // the interval to reflect this and reset the increment.
+ cache.start = ms;
+ cache.end = newEnd;
+ cache.increment = msPerMonth;
+ } else {
+ // The interval contains a DST offset change and the given time is
+ // before it. Adjust the increment to avoid a linear search for
+ // the offset change point and change the end of the interval.
+ cache.increment /= 3;
+ cache.end = ms;
+ }
+ // Update the offset in the cache and return it.
+ cache.offset = offset;
+ return offset;
+ }
+ }
+ }
+
+ // Compute the DST offset for the time and shrink the cache interval
+ // to only contain the time. This allows fast repeated DST offset
+ // computations for the same time.
+ double offset = calculateDSTOffset(ms, utcOffset);
+ cache.offset = offset;
+ cache.start = ms;
+ cache.end = ms;
+ cache.increment = msPerMonth;
+ return offset;
+}
+/*
+ * Get the difference in milliseconds between this time zone and UTC (GMT)
+ * NOT including DST.
+ */
+double getUTCOffset(ExecState* exec)
+{
+ double utcOffset = exec->globalData().cachedUTCOffset;
+ if (!isnan(utcOffset))
+ return utcOffset;
+ exec->globalData().cachedUTCOffset = calculateUTCOffset();
+ return exec->globalData().cachedUTCOffset;
+}
-} // namespace WTF
+double gregorianDateTimeToMS(ExecState* exec, const GregorianDateTime& t, double milliSeconds, bool inputIsUTC)
+{
+ double day = dateToDaysFrom1970(t.year + 1900, t.month, t.monthDay);
+ double ms = timeToMS(t.hour, t.minute, t.second, milliSeconds);
+ double result = (day * WTF::msPerDay) + ms;
+
+ if (!inputIsUTC) { // convert to UTC
+ double utcOffset = getUTCOffset(exec);
+ result -= utcOffset;
+ result -= getDSTOffset(exec, result, utcOffset);
+ }
+
+ return result;
+}
+
+// input is UTC
+void msToGregorianDateTime(ExecState* exec, double ms, bool outputIsUTC, GregorianDateTime& tm)
+{
+ double dstOff = 0.0;
+ double utcOff = 0.0;
+ if (!outputIsUTC) {
+ utcOff = getUTCOffset(exec);
+ dstOff = getDSTOffset(exec, ms, utcOff);
+ ms += dstOff + utcOff;
+ }
+
+ const int year = msToYear(ms);
+ tm.second = msToSeconds(ms);
+ tm.minute = msToMinutes(ms);
+ tm.hour = msToHours(ms);
+ tm.weekDay = msToWeekDay(ms);
+ tm.yearDay = dayInYear(ms, year);
+ tm.monthDay = dayInMonthFromDayInYear(tm.yearDay, isLeapYear(year));
+ tm.month = monthFromDayInYear(tm.yearDay, isLeapYear(year));
+ tm.year = year - 1900;
+ tm.isDST = dstOff != 0.0;
+ tm.utcOffset = static_cast<long>((dstOff + utcOff) / WTF::msPerSecond);
+ tm.timeZone = NULL;
+}
+
+double parseDateFromNullTerminatedCharacters(ExecState* exec, const char* dateString)
+{
+ ASSERT(exec);
+ bool haveTZ;
+ int offset;
+ double ms = WTF::parseDateFromNullTerminatedCharacters(dateString, haveTZ, offset);
+ if (isnan(ms))
+ return NaN;
+
+ // fall back to local timezone
+ if (!haveTZ) {
+ double utcOffset = getUTCOffset(exec);
+ double dstOffset = getDSTOffset(exec, ms, utcOffset);
+ offset = static_cast<int>((utcOffset + dstOffset) / WTF::msPerMinute);
+ }
+ return ms - (offset * WTF::msPerMinute);
+}
+
+} // namespace JSC
+#endif // USE(JSC)
projects / apple / javascriptcore.git / blobdiff