aarch64: Add assembly support for -fsanitize=hwaddress tagged globals.
[libav.git] / libavformat / cutils.c
1 /*
2 * various simple utilities for libavformat
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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.
11 *
12 * Libav 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.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/time_internal.h"
23 #include "avformat.h"
24 #include "internal.h"
25
26 /* add one element to a dynamic array */
27 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem)
28 {
29 /* see similar avconv.c:grow_array() */
30 int nb, nb_alloc;
31 intptr_t *tab;
32
33 nb = *nb_ptr;
34 tab = *tab_ptr;
35 if ((nb & (nb - 1)) == 0) {
36 if (nb == 0)
37 nb_alloc = 1;
38 else
39 nb_alloc = nb * 2;
40 tab = av_realloc(tab, nb_alloc * sizeof(intptr_t));
41 *tab_ptr = tab;
42 }
43 tab[nb++] = elem;
44 *nb_ptr = nb;
45 }
46
47 #define ISLEAP(y) (((y) % 4 == 0) && (((y) % 100) != 0 || ((y) % 400) == 0))
48 #define LEAPS_COUNT(y) ((y)/4 - (y)/100 + (y)/400)
49
50 /* This is our own gmtime_r. It differs from its POSIX counterpart in a
51 couple of places, though. */
52 struct tm *ff_brktimegm(time_t secs, struct tm *tm)
53 {
54 tm = gmtime_r(&secs, tm);
55
56 tm->tm_year += 1900; /* unlike gmtime_r we store complete year here */
57 tm->tm_mon += 1; /* unlike gmtime_r tm_mon is from 1 to 12 */
58
59 return tm;
60 }