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/* PO/POT file timestamps.
Copyright (C) 1995-1998, 2000-2003, 2006, 2015 Free Software
Foundation, Inc.
Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, April 1995.
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 3 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, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/* Specification. */
#include "po-time.h"
#include "xvasprintf.h"
#define TM_YEAR_ORIGIN 1900
/* Yield A - B, measured in seconds. */
static long
difftm (const struct tm *a, const struct tm *b)
{
int ay = a->tm_year + TM_YEAR_ORIGIN - 1;
int by = b->tm_year + TM_YEAR_ORIGIN - 1;
/* Some compilers cannot handle this as a single return statement. */
long days = (
/* difference in day of year */
a->tm_yday - b->tm_yday
/* + intervening leap days */
+ ((ay >> 2) - (by >> 2))
- (ay / 100 - by / 100)
+ ((ay / 100 >> 2) - (by / 100 >> 2))
/* + difference in years * 365 */
+ (long) (ay - by) * 365l);
return 60l * (60l * (24l * days + (a->tm_hour - b->tm_hour))
+ (a->tm_min - b->tm_min))
+ (a->tm_sec - b->tm_sec);
}
char *
po_strftime (const time_t *tp)
{
struct tm local_time;
char tz_sign;
long tz_min;
local_time = *localtime (tp);
tz_sign = '+';
tz_min = difftm (&local_time, gmtime (tp)) / 60;
if (tz_min < 0)
{
tz_min = -tz_min;
tz_sign = '-';
}
return xasprintf ("%d-%02d-%02d %02d:%02d%c%02ld%02ld",
local_time.tm_year + TM_YEAR_ORIGIN,
local_time.tm_mon + 1,
local_time.tm_mday,
local_time.tm_hour,
local_time.tm_min,
tz_sign, tz_min / 60, tz_min % 60);
}
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