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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* The Original Code is the Netscape Portable Runtime (NSPR).
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-2000
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* the Initial Developer. All Rights Reserved.
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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* ***** END LICENSE BLOCK ***** */
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unsigned long gJanuaryFirst1970Seconds;
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* The geographic location and time zone information of a Mac
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* are stored in extended parameter RAM. The ReadLocation
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* produdure uses the geographic location record, MachineLocation,
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* to read the geographic location and time zone information in
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* extended parameter RAM.
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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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* Caveat: this caching will give the wrong result if a session
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* extend across the DST changeover time.
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static void MyReadLocation(MachineLocation *loc)
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static MachineLocation storedLoc;
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static Boolean didReadLocation = false;
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if (!didReadLocation) {
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ReadLocation(&storedLoc);
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didReadLocation = true;
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static long GMTDelta(void)
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gmtDelta = loc.u.gmtDelta & 0x00ffffff;
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if (gmtDelta & 0x00800000) { /* test sign extend bit */
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gmtDelta |= 0xff000000;
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void MacintoshInitializeTime(void)
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* The NSPR epoch is midnight, Jan. 1, 1970 GMT.
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* At midnight Jan. 1, 1970 GMT, the local time was
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* midnight Jan. 1, 1970 + GMTDelta().
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* Midnight Jan. 1, 1970 is 86400 * (365 * (1970 - 1904) + 17)
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* = 2082844800 seconds since the Mac epoch.
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* (There were 17 leap years from 1904 to 1970.)
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* So the NSPR epoch is 2082844800 + GMTDelta() seconds since
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* the Mac epoch. Whew! :-)
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gJanuaryFirst1970Seconds = 2082844800 + GMTDelta();
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*-----------------------------------------------------------------------
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* Returns the current time in microseconds since the epoch.
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* The epoch is midnight January 1, 1970 GMT.
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* The implementation is machine dependent. This is the Mac
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* Cf. time_t time(time_t *tp)
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*-----------------------------------------------------------------------
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unsigned long currentTime; /* unsigned 32-bit integer, ranging
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from midnight Jan. 1, 1904 to
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6:28:15 AM Feb. 6, 2040 */
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* Get the current time expressed as the number of seconds
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* elapsed since the Mac epoch, midnight, Jan. 1, 1904 (local time).
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* On a Mac, current time accuracy is up to a second.
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GetDateTime(¤tTime);
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* Express the current time relative to the NSPR epoch,
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* midnight, Jan. 1, 1970 GMT.
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* At midnight Jan. 1, 1970 GMT, the local time was
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* midnight Jan. 1, 1970 + GMTDelta().
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* Midnight Jan. 1, 1970 is 86400 * (365 * (1970 - 1904) + 17)
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* = 2082844800 seconds since the Mac epoch.
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* (There were 17 leap years from 1904 to 1970.)
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* So the NSPR epoch is 2082844800 + GMTDelta() seconds since
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* the Mac epoch. Whew! :-)
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currentTime = currentTime - 2082844800 - GMTDelta();
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/* Convert seconds to microseconds */
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LL_I2L(usecPerSec, PR_USEC_PER_SEC);
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LL_I2L(retVal, currentTime);
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LL_MUL(retVal, retVal, usecPerSec);
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*-------------------------------------------------------------------------
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* PR_LocalTimeParameters --
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* returns the time parameters for the local time zone
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* This is the machine-dependent implementation for Mac.
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* Caveat: On a Mac, we only know the GMT and DST offsets for
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* the current time, not for the time in question.
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* Mac has no support for DST handling.
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* DST changeover is all manually set by the user.
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*-------------------------------------------------------------------------
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PRTimeParameters PR_LocalTimeParameters(const PRExplodedTime *gmt)
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PRTimeParameters retVal;
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MyReadLocation(&loc);
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* On a Mac, the GMT value is in seconds east of GMT. For example,
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* San Francisco is at -28,800 seconds (8 hours * 3600 seconds per hour)
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* east of GMT. The gmtDelta field is a 3-byte value contained in a
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* long word, so you must take care to get it properly.
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retVal.tp_gmt_offset = loc.u.gmtDelta & 0x00ffffff;
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if (retVal.tp_gmt_offset & 0x00800000) { /* test sign extend bit */
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retVal.tp_gmt_offset |= 0xff000000;
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* The daylight saving time value, dlsDelta, is a signed byte
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* value representing the offset for the hour field -- whether
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* to add 1 hour, subtract 1 hour, or make no change at all.
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if (loc.u.dlsDelta) {
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retVal.tp_gmt_offset -= 3600;
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retVal.tp_dst_offset = 3600;
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retVal.tp_dst_offset = 0;
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PRIntervalTime _MD_GetInterval(void)
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PRIntervalTime retVal;
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PRUint64 upTime, microtomilli;
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* Use the Microseconds procedure to obtain the number of
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* microseconds elapsed since system startup time.
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Microseconds((UnsignedWide *)&upTime);
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LL_I2L(microtomilli, PR_USEC_PER_MSEC);
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LL_DIV(upTime, upTime, microtomilli);
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LL_L2I(retVal, upTime);
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struct tm *Maclocaltime(const time_t * t)
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time_t macLocal = *t + gJanuaryFirst1970Seconds; /* GMT Mac */
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static struct tm statictime;
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static const short monthday[12] =
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{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
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SecondsToDate(macLocal, &dtr);
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statictime.tm_sec = dtr.second;
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statictime.tm_min = dtr.minute;
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statictime.tm_hour = dtr.hour;
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statictime.tm_mday = dtr.day;
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statictime.tm_mon = dtr.month - 1;
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statictime.tm_year = dtr.year - 1900;
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statictime.tm_wday = dtr.dayOfWeek - 1;
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statictime.tm_yday = monthday[statictime.tm_mon]
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+ statictime.tm_mday - 1;
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if (2 < statictime.tm_mon && !(statictime.tm_year & 3))
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++statictime.tm_yday;
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MyReadLocation(&loc);
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statictime.tm_isdst = loc.u.dlsDelta;
added
removed
mozilla/nsprpub/pr/src/md/mac/mactime.c
