gecko-dev/lib/mac/Misc/mactime.c

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C
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifdef mktime
#undef mktime
#undef ctime
#undef localtime
_C_LIB_DECL /* declarations */
time_t mktime(struct tm *);
char *ctime(const time_t *);
struct tm *localtime(const time_t *);
_END_C_LIB_DECL
#endif
#ifndef UNIXMINUSMACTIME
#define UNIXMINUSMACTIME 2082844800UL
#endif
#include <time.h>
#ifndef __OSUTILS__
#include <OSUtils.h>
#endif
#ifndef __TOOLUTILS__
#include <ToolUtils.h>
#endif
// Because serial port and SLIP conflict with ReadXPram calls,
// we cache the call here
// The symptoms are the
void MyReadLocation(MachineLocation * loc);
long GMTDelta();
void MyReadLocation(MachineLocation * loc)
{
static MachineLocation storedLoc; // InsideMac, OSUtilities, page 4-20
static Boolean didReadLocation = false;
if (!didReadLocation)
{
ReadLocation(&storedLoc);
didReadLocation = true;
}
*loc = storedLoc;
}
Boolean DaylightSavings()
{
MachineLocation loc;
unsigned char dlsDelta;
MyReadLocation(&loc);
dlsDelta = loc.u.dlsDelta;
return (dlsDelta != 0);
}
// This routine is copied straight out of stdio sources.
// The only difference is that we use MyReadLocation instead of ReadLocation.
struct tm *(gmtime)(const time_t *tod)
{ /* convert to Greenwich Mean Time (UTC) */
MachineLocation myLocation;
long int internalGmtDelta;
time_t ltime;
MyReadLocation(&myLocation);
internalGmtDelta = myLocation.u.gmtDelta & 0x00ffffff;
if (internalGmtDelta & 0x00800000)
internalGmtDelta = internalGmtDelta | 0xff000000;
ltime = (*tod) - internalGmtDelta;
return (localtime(&(ltime)));
}
// We need to do this, because we wrap localtime as a macro in
#ifdef localtime
#undef localtime
#endif
struct tm *localtime(const time_t *tp)
{
DateTimeRec dtr;
MachineLocation loc;
static struct tm statictime;
static const short monthday[12] =
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
SecondsToDate(*tp, &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);
}
// current local time = GMTDelta() + GMT
// GMT = local time - GMTDelta()
long GMTDelta()
{
MachineLocation loc;
long gmtDelta;
MyReadLocation(&loc);
gmtDelta = loc.u.gmtDelta & 0x00FFFFFF;
if ((gmtDelta & 0x00800000) != 0)
gmtDelta |= 0xFF000000;
return gmtDelta;
}
// This routine simulates stdclib time(), time in seconds since 1.1.1970
// The time is in GMT
time_t GetTimeMac()
{
unsigned long maclocal;
// Get Mac local time
GetDateTime(&maclocal);
// Get Mac GMT
maclocal -= GMTDelta();
// return unix GMT
return (maclocal - UNIXMINUSMACTIME);
}
// Returns the GMT times
time_t Mactime(time_t *timer)
{
time_t t = GetTimeMac();
if (timer != NULL)
*timer = t;
return t;
}
time_t Macmktime (struct tm *timeptr)
{
time_t theTime;
// <20><><EFBFBD> HACK to work around the bug in mktime
int negativeDiff = 0;
if (timeptr->tm_sec < 0)
{
negativeDiff += timeptr->tm_sec;
timeptr->tm_sec = 0;
}
if (timeptr->tm_min < 0)
{
negativeDiff += timeptr->tm_min*60;
timeptr->tm_min = 0;
}
if (timeptr->tm_hour < 0)
{
negativeDiff += timeptr->tm_hour*60*60;
timeptr->tm_hour = 0;
}
if (timeptr->tm_mday < 0)
{
negativeDiff += timeptr->tm_mday*60*60*24;
timeptr->tm_mday = 0;
}
// local/Mac
theTime = mktime(timeptr);
// mktime does not care what the daylightsavings flag is
timeptr->tm_isdst = 0;//DaylightSavings();
theTime += negativeDiff;
// GMT/Mac
theTime -= GMTDelta();
// unix/GMT
return theTime - UNIXMINUSMACTIME;
}
//
char * Macctime(const time_t * t)
{
// GMT Mac
time_t macTime = *t + UNIXMINUSMACTIME;
// local Mac
macTime += GMTDelta();
return ctime(&macTime);
}
struct tm *Maclocaltime(const time_t * t)
{
// GMT Mac
time_t macLocal = *t + UNIXMINUSMACTIME;
// local Mac
macLocal += GMTDelta();
return localtime(&macLocal);
}
// -> unix GMT
struct tm *Macgmtime (const time_t *clock)
{
// GMT Mac
time_t macGMT = *clock + UNIXMINUSMACTIME;
return localtime(&macGMT);
}