0,0 → 1,69 |
/**************************************************************************** |
* |
* Open Watcom Project |
* |
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
* |
* ======================================================================== |
* |
* This file contains Original Code and/or Modifications of Original |
* Code as defined in and that are subject to the Sybase Open Watcom |
* Public License version 1.0 (the 'License'). You may not use this file |
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
* provided with the Original Code and Modifications, and is also |
* available at www.sybase.com/developer/opensource. |
* |
* The Original Code and all software distributed under the License are |
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
* NON-INFRINGEMENT. Please see the License for the specific language |
* governing rights and limitations under the License. |
* |
* ======================================================================== |
* |
* Description: Platform independent mktime() implementation. |
* |
****************************************************************************/ |
|
#include "variety.h" |
#include <stdio.h> |
#include <stdlib.h> |
#include <time.h> |
#include <limits.h> |
#include "rtdata.h" |
#include "timedata.h" |
|
_WCRTLINK time_t mktime( struct tm *t ) |
{ |
long days; |
long seconds; |
long day_seconds; |
|
seconds = __local_mktime( t, &days, &day_seconds ); |
__brktime( (unsigned long) days, (time_t) day_seconds, 0L, t ); |
tzset(); |
seconds += _RWD_timezone; /* add in seconds from GMT */ |
#ifdef __LINUX__ |
if( t->tm_isdst < 0 ) |
__check_tzfile( seconds, t ); |
#endif |
/* if we are in d.s.t. then subtract __dst_adjust from seconds */ |
if( __isindst( t ) ) /* - determine if we are in d.s.t. */ |
seconds -= _RWD_dst_adjust; |
#ifdef __UNIX__ /* time_t is signed */ |
if( seconds < 0 ) |
return( ( time_t ) -1 ); |
#else /* time_t is unsigned, special day check needed for 31 dec 1969 */ |
/* check for overflow; days == 75277 && seconds == 23296 returns 0, but |
adjusted for dst may still be fine */ |
if( days >= 75279 || |
( seconds >= 0 && days >= 75276 ) || |
( seconds < 0 && days <= DAYS_FROM_1900_TO_1970 ) ) |
return( (time_t) -1 ); |
/* 0 is year = 206, mon = 1, mday = 7, hour = 6, min = 28, sec = 16 */ |
#endif |
return( ( time_t ) seconds ); |
} |