2 * Various simple utilities for ffmpeg system
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
23 #if !defined(CONFIG_NOCUTILS)
25 * Return TRUE if val is a prefix of str. If it returns TRUE, ptr is
26 * set to the next character in 'str' after the prefix.
28 * @param str input string
29 * @param val prefix to test
30 * @param ptr updated after the prefix in str in there is a match
31 * @return TRUE if there is a match
33 int strstart(const char *str, const char *val, const char **ptr)
50 * Return TRUE if val is a prefix of str (case independent). If it
51 * returns TRUE, ptr is set to the next character in 'str' after the
54 * @param str input string
55 * @param val prefix to test
56 * @param ptr updated after the prefix in str in there is a match
57 * @return TRUE if there is a match */
58 int stristart(const char *str, const char *val, const char **ptr)
64 if (toupper(*(const unsigned char *)p) != toupper(*(const unsigned char *)q))
75 * Copy the string str to buf. If str length is bigger than buf_size -
76 * 1 then it is clamped to buf_size - 1.
77 * NOTE: this function does what strncpy should have done to be
78 * useful. NEVER use strncpy.
80 * @param buf destination buffer
81 * @param buf_size size of destination buffer
82 * @param str source string
84 void pstrcpy(char *buf, int buf_size, const char *str)
94 if (c == 0 || q >= buf + buf_size - 1)
101 /* strcat and truncate. */
102 char *pstrcat(char *buf, int buf_size, const char *s)
107 pstrcpy(buf + len, buf_size - len, s);
113 /* add one element to a dynamic array */
114 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem)
121 if ((nb & (nb - 1)) == 0) {
126 tab = av_realloc(tab, nb_alloc * sizeof(unsigned long));
133 time_t mktimegm(struct tm *tm)
137 int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
145 (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + y / 400 - 719469);
147 t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
152 #define ISLEAP(y) (((y) % 4 == 0) && (((y) % 100) != 0 || ((y) % 400) == 0))
153 #define LEAPS_COUNT(y) ((y)/4 - (y)/100 + (y)/400)
155 /* this is our own gmtime_r. it differs from its POSIX counterpart in a
156 couple of places, though. */
157 struct tm *brktimegm(time_t secs, struct tm *tm)
160 int md[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
164 tm->tm_hour = secs / 3600;
165 tm->tm_min = (secs % 3600) / 60;
166 tm->tm_sec = secs % 60;
168 /* oh well, may be someone some day will invent a formula for this stuff */
169 y = 1970; /* start "guessing" */
170 while (days >= (ISLEAP(y)?366:365)) {
172 days -= (ny - y) * 365 + LEAPS_COUNT(ny - 1) - LEAPS_COUNT(y - 1);
175 md[1] = ISLEAP(y)?29:28;
176 for (m=0; days >= md[m]; m++)
179 tm->tm_year = y; /* unlike gmtime_r we store complete year here */
180 tm->tm_mon = m+1; /* unlike gmtime_r tm_mon is from 1 to 12 */
181 tm->tm_mday = days+1;
186 /* get a positive number between n_min and n_max, for a maximum length
187 of len_max. Return -1 if error. */
188 static int date_get_num(const char **pp,
189 int n_min, int n_max, int len_max)
196 for(i = 0; i < len_max; i++) {
200 val = (val * 10) + c - '0';
203 /* no number read ? */
206 if (val < n_min || val > n_max)
212 /* small strptime for ffmpeg */
213 const char *small_strptime(const char *p, const char *fmt,
222 } else if (c == '%') {
226 val = date_get_num(&p, 0, 23, 2);
232 val = date_get_num(&p, 0, 59, 2);
238 val = date_get_num(&p, 0, 59, 2);
244 val = date_get_num(&p, 0, 9999, 4);
247 dt->tm_year = val - 1900;
250 val = date_get_num(&p, 1, 12, 2);
253 dt->tm_mon = val - 1;
256 val = date_get_num(&p, 1, 31, 2);