mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-21 11:09:40 +08:00
a489d8b084
2003-03-10 Mohan Embar <gnustuff@thisiscool.com>
* dostime.c: add #include <stddef.h> for definition of NULL
From-SVN: r64112
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/* dostime.c - convert dos time to/from time_t.
|
|
|
|
Copyright (C) 2002 Free Software Foundation
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <time.h>
|
|
|
|
#include <stddef.h>
|
|
|
|
#include "dostime.h"
|
|
|
|
/*
|
|
* The specification to which this was written. From Joe Buck.
|
|
* The DOS format appears to have only 2 second resolution. It is an
|
|
* unsigned long, and ORs together
|
|
*
|
|
* (year-1980)<<25
|
|
* month<<21 (month is tm_mon + 1, 1=Jan through 12=Dec)
|
|
* day<<16 (day is tm_mday, 1-31)
|
|
* hour<<11 (hour is tm_hour, 0-23)
|
|
* min<<5 (min is tm_min, 0-59)
|
|
* sec>>1 (sec is tm_sec, 0-59, that's right, we throw away the LSB)
|
|
*
|
|
* DOS uses local time, so the localtime() call is used to turn the time_t
|
|
* into a struct tm.
|
|
*/
|
|
|
|
time_t
|
|
dos2unixtime (unsigned long dostime)
|
|
{
|
|
struct tm ltime;
|
|
time_t now = time (NULL);
|
|
|
|
/* Call localtime to initialize timezone in TIME. */
|
|
ltime = *localtime (&now);
|
|
|
|
ltime.tm_year = (dostime >> 25) + 80;
|
|
ltime.tm_mon = ((dostime >> 21) & 0x0f) - 1;
|
|
ltime.tm_mday = (dostime >> 16) & 0x1f;
|
|
ltime.tm_hour = (dostime >> 11) & 0x0f;
|
|
ltime.tm_min = (dostime >> 5) & 0x3f;
|
|
ltime.tm_sec = (dostime & 0x1f) << 1;
|
|
|
|
ltime.tm_wday = -1;
|
|
ltime.tm_yday = -1;
|
|
ltime.tm_isdst = -1;
|
|
|
|
return mktime (<ime);
|
|
}
|
|
|
|
unsigned long
|
|
unix2dostime (time_t *time)
|
|
{
|
|
struct tm *ltime = localtime (time);
|
|
int year = ltime->tm_year - 80;
|
|
if (year < 0)
|
|
year = 0;
|
|
|
|
return (year << 25
|
|
| (ltime->tm_mon + 1) << 21
|
|
| ltime->tm_mday << 16
|
|
| ltime->tm_hour << 11
|
|
| ltime->tm_min << 5
|
|
| ltime->tm_sec >> 1);
|
|
}
|