mirror of
https://github.com/videolan/vlc.git
synced 2024-11-23 09:53:43 +08:00
ed7287c042
The prototype of timegm() does not have 'const'. This fixes compilation on OS/2 which have only a declaration of timegm(). Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*****************************************************************************
|
|
* timegm.c: BSD/GNU timegm() replacement
|
|
*****************************************************************************
|
|
* Copyright © 2007 Laurent Aimar
|
|
* Copyright © 2015 Rémi Denis-Courmont
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
|
|
*****************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <stdbool.h>
|
|
#include <time.h>
|
|
|
|
static bool is_leap_year(unsigned y)
|
|
{
|
|
if (y % 4)
|
|
return false;
|
|
if (y % 100)
|
|
return true;
|
|
if (y % 400)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
time_t timegm(struct tm *tm)
|
|
{
|
|
static const unsigned ydays[12 + 1] = {
|
|
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
|
|
};
|
|
|
|
if (tm->tm_year < 70 /* FIXME: (negative) dates before Epoch */
|
|
|| tm->tm_mon < 0 || tm->tm_mon > 11
|
|
|| tm->tm_mday < 1 || tm->tm_mday > 31
|
|
|| tm->tm_hour < 0 || tm->tm_hour > 23
|
|
|| tm->tm_min < 0 || tm->tm_min > 59
|
|
|| tm->tm_sec < 0 || tm->tm_sec > 60 /* mind the leap second */)
|
|
return -1;
|
|
|
|
/* Count the number of days */
|
|
unsigned t = 365 * (tm->tm_year - 70)
|
|
+ ydays[tm->tm_mon] + (tm->tm_mday - 1);
|
|
|
|
/* TODO: unroll */
|
|
for (int i = 70; i < tm->tm_year; i++)
|
|
t += is_leap_year(1900 + i);
|
|
|
|
if (tm->tm_mon > 1)
|
|
t += is_leap_year(1900 + tm->tm_year);
|
|
|
|
t *= 24;
|
|
t += tm->tm_hour;
|
|
t *= 60;
|
|
t += tm->tm_min;
|
|
t *= 60;
|
|
t += tm->tm_sec;
|
|
return t;
|
|
}
|