0458a2dc7c6c1293afc24d63d04c941df3ce1a6b
2 * various simple utilities for libavformat
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #define ISLEAP(y) (((y) % 4 == 0) && (((y) % 100) != 0 || ((y) % 400) == 0))
25 #define LEAPS_COUNT(y) ((y)/4 - (y)/100 + (y)/400)
27 /* This is our own gmtime_r. It differs from its POSIX counterpart in a
28 couple of places, though. */
29 struct tm
*ff_brktimegm(time_t secs
, struct tm
*tm
)
32 int md
[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
36 tm
->tm_hour
= secs
/ 3600;
37 tm
->tm_min
= (secs
% 3600) / 60;
38 tm
->tm_sec
= secs
% 60;
40 /* oh well, may be someone some day will invent a formula for this stuff */
41 y
= 1970; /* start "guessing" */
44 days
-= (ny
- y
) * 365 + LEAPS_COUNT(ny
- 1) - LEAPS_COUNT(y
- 1);
47 if (days
==365 && !ISLEAP(y
)) { days
=0; y
++; }
48 md
[1] = ISLEAP(y
)?29:28;
49 for (m
=0; days
>= md
[m
]; m
++)
52 tm
->tm_year
= y
; /* unlike gmtime_r we store complete year here */
53 tm
->tm_mon
= m
+1; /* unlike gmtime_r tm_mon is from 1 to 12 */