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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape Portable Runtime (NSPR).
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998-2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <OSUtils.h>
+#include <Timer.h>
+
+#include "primpl.h"
+
+#include "mactime.h"
+
+unsigned long gJanuaryFirst1970Seconds;
+
+/*
+ * The geographic location and time zone information of a Mac
+ * are stored in extended parameter RAM. The ReadLocation
+ * produdure uses the geographic location record, MachineLocation,
+ * to read the geographic location and time zone information in
+ * extended parameter RAM.
+ *
+ * Because serial port and SLIP conflict with ReadXPram calls,
+ * we cache the call here.
+ *
+ * Caveat: this caching will give the wrong result if a session
+ * extend across the DST changeover time.
+ */
+
+static void MyReadLocation(MachineLocation *loc)
+{
+ static MachineLocation storedLoc;
+ static Boolean didReadLocation = false;
+
+ if (!didReadLocation) {
+ ReadLocation(&storedLoc);
+ didReadLocation = true;
+ }
+ *loc = storedLoc;
+}
+
+static long GMTDelta(void)
+{
+ MachineLocation loc;
+ long gmtDelta;
+
+ MyReadLocation(&loc);
+ gmtDelta = loc.u.gmtDelta & 0x00ffffff;
+ if (gmtDelta & 0x00800000) { /* test sign extend bit */
+ gmtDelta |= 0xff000000;
+ }
+ return gmtDelta;
+}
+
+void MacintoshInitializeTime(void)
+{
+ /*
+ * The NSPR epoch is midnight, Jan. 1, 1970 GMT.
+ *
+ * At midnight Jan. 1, 1970 GMT, the local time was
+ * midnight Jan. 1, 1970 + GMTDelta().
+ *
+ * Midnight Jan. 1, 1970 is 86400 * (365 * (1970 - 1904) + 17)
+ * = 2082844800 seconds since the Mac epoch.
+ * (There were 17 leap years from 1904 to 1970.)
+ *
+ * So the NSPR epoch is 2082844800 + GMTDelta() seconds since
+ * the Mac epoch. Whew! :-)
+ */
+ gJanuaryFirst1970Seconds = 2082844800 + GMTDelta();
+}
+
+/*
+ *-----------------------------------------------------------------------
+ *
+ * PR_Now --
+ *
+ * Returns the current time in microseconds since the epoch.
+ * The epoch is midnight January 1, 1970 GMT.
+ * The implementation is machine dependent. This is the Mac
+ * Implementation.
+ * Cf. time_t time(time_t *tp)
+ *
+ *-----------------------------------------------------------------------
+ */
+
+PRTime PR_Now(void)
+{
+ unsigned long currentTime; /* unsigned 32-bit integer, ranging
+ from midnight Jan. 1, 1904 to
+ 6:28:15 AM Feb. 6, 2040 */
+ PRTime retVal;
+ int64 usecPerSec;
+
+ /*
+ * Get the current time expressed as the number of seconds
+ * elapsed since the Mac epoch, midnight, Jan. 1, 1904 (local time).
+ * On a Mac, current time accuracy is up to a second.
+ */
+ GetDateTime(&currentTime);
+
+ /*
+ * Express the current time relative to the NSPR epoch,
+ * midnight, Jan. 1, 1970 GMT.
+ *
+ * At midnight Jan. 1, 1970 GMT, the local time was
+ * midnight Jan. 1, 1970 + GMTDelta().
+ *
+ * Midnight Jan. 1, 1970 is 86400 * (365 * (1970 - 1904) + 17)
+ * = 2082844800 seconds since the Mac epoch.
+ * (There were 17 leap years from 1904 to 1970.)
+ *
+ * So the NSPR epoch is 2082844800 + GMTDelta() seconds since
+ * the Mac epoch. Whew! :-)
+ */
+ currentTime = currentTime - 2082844800 - GMTDelta();
+
+ /* Convert seconds to microseconds */
+ LL_I2L(usecPerSec, PR_USEC_PER_SEC);
+ LL_I2L(retVal, currentTime);
+ LL_MUL(retVal, retVal, usecPerSec);
+
+ return retVal;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * PR_LocalTimeParameters --
+ *
+ * returns the time parameters for the local time zone
+ *
+ * This is the machine-dependent implementation for Mac.
+ *
+ * Caveat: On a Mac, we only know the GMT and DST offsets for
+ * the current time, not for the time in question.
+ * Mac has no support for DST handling.
+ * DST changeover is all manually set by the user.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+PRTimeParameters PR_LocalTimeParameters(const PRExplodedTime *gmt)
+{
+#pragma unused (gmt)
+
+ PRTimeParameters retVal;
+ MachineLocation loc;
+
+ MyReadLocation(&loc);
+
+ /*
+ * On a Mac, the GMT value is in seconds east of GMT. For example,
+ * San Francisco is at -28,800 seconds (8 hours * 3600 seconds per hour)
+ * east of GMT. The gmtDelta field is a 3-byte value contained in a
+ * long word, so you must take care to get it properly.
+ */
+
+ retVal.tp_gmt_offset = loc.u.gmtDelta & 0x00ffffff;
+ if (retVal.tp_gmt_offset & 0x00800000) { /* test sign extend bit */
+ retVal.tp_gmt_offset |= 0xff000000;
+ }
+
+ /*
+ * The daylight saving time value, dlsDelta, is a signed byte
+ * value representing the offset for the hour field -- whether
+ * to add 1 hour, subtract 1 hour, or make no change at all.
+ */
+
+ if (loc.u.dlsDelta) {
+ retVal.tp_gmt_offset -= 3600;
+ retVal.tp_dst_offset = 3600;
+ } else {
+ retVal.tp_dst_offset = 0;
+ }
+ return retVal;
+}
+
+PRIntervalTime _MD_GetInterval(void)
+{
+ PRIntervalTime retVal;
+ PRUint64 upTime, microtomilli;
+
+ /*
+ * Use the Microseconds procedure to obtain the number of
+ * microseconds elapsed since system startup time.
+ */
+ Microseconds((UnsignedWide *)&upTime);
+ LL_I2L(microtomilli, PR_USEC_PER_MSEC);
+ LL_DIV(upTime, upTime, microtomilli);
+ LL_L2I(retVal, upTime);
+
+ return retVal;
+}
+
+struct tm *Maclocaltime(const time_t * t)
+{
+ DateTimeRec dtr;
+ MachineLocation loc;
+ time_t macLocal = *t + gJanuaryFirst1970Seconds; /* GMT Mac */
+ static struct tm statictime;
+ static const short monthday[12] =
+ {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
+
+ SecondsToDate(macLocal, &dtr);
+ statictime.tm_sec = dtr.second;
+ statictime.tm_min = dtr.minute;
+ statictime.tm_hour = dtr.hour;
+ statictime.tm_mday = dtr.day;
+ statictime.tm_mon = dtr.month - 1;
+ statictime.tm_year = dtr.year - 1900;
+ statictime.tm_wday = dtr.dayOfWeek - 1;
+ statictime.tm_yday = monthday[statictime.tm_mon]
+ + statictime.tm_mday - 1;
+ if (2 < statictime.tm_mon && !(statictime.tm_year & 3))
+ ++statictime.tm_yday;
+ MyReadLocation(&loc);
+ statictime.tm_isdst = loc.u.dlsDelta;
+ return(&statictime);
+}
+
+
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