mirror of https://git.ffmpeg.org/ffmpeg.git
274 lines
6.9 KiB
C
274 lines
6.9 KiB
C
/*
|
|
* Various simple utilities for ffmpeg system
|
|
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include "avformat.h"
|
|
|
|
#if !defined(CONFIG_NOCUTILS)
|
|
/**
|
|
* Return TRUE if val is a prefix of str. If it returns TRUE, ptr is
|
|
* set to the next character in 'str' after the prefix.
|
|
*
|
|
* @param str input string
|
|
* @param val prefix to test
|
|
* @param ptr updated after the prefix in str in there is a match
|
|
* @return TRUE if there is a match
|
|
*/
|
|
int strstart(const char *str, const char *val, const char **ptr)
|
|
{
|
|
const char *p, *q;
|
|
p = str;
|
|
q = val;
|
|
while (*q != '\0') {
|
|
if (*p != *q)
|
|
return 0;
|
|
p++;
|
|
q++;
|
|
}
|
|
if (ptr)
|
|
*ptr = p;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Return TRUE if val is a prefix of str (case independent). If it
|
|
* returns TRUE, ptr is set to the next character in 'str' after the
|
|
* prefix.
|
|
*
|
|
* @param str input string
|
|
* @param val prefix to test
|
|
* @param ptr updated after the prefix in str in there is a match
|
|
* @return TRUE if there is a match */
|
|
int stristart(const char *str, const char *val, const char **ptr)
|
|
{
|
|
const char *p, *q;
|
|
p = str;
|
|
q = val;
|
|
while (*q != '\0') {
|
|
if (toupper(*(const unsigned char *)p) != toupper(*(const unsigned char *)q))
|
|
return 0;
|
|
p++;
|
|
q++;
|
|
}
|
|
if (ptr)
|
|
*ptr = p;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Copy the string str to buf. If str length is bigger than buf_size -
|
|
* 1 then it is clamped to buf_size - 1.
|
|
* NOTE: this function does what strncpy should have done to be
|
|
* useful. NEVER use strncpy.
|
|
*
|
|
* @param buf destination buffer
|
|
* @param buf_size size of destination buffer
|
|
* @param str source string
|
|
*/
|
|
void pstrcpy(char *buf, int buf_size, const char *str)
|
|
{
|
|
int c;
|
|
char *q = buf;
|
|
|
|
if (buf_size <= 0)
|
|
return;
|
|
|
|
for(;;) {
|
|
c = *str++;
|
|
if (c == 0 || q >= buf + buf_size - 1)
|
|
break;
|
|
*q++ = c;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
|
|
/* strcat and truncate. */
|
|
char *pstrcat(char *buf, int buf_size, const char *s)
|
|
{
|
|
int len;
|
|
len = strlen(buf);
|
|
if (len < buf_size)
|
|
pstrcpy(buf + len, buf_size - len, s);
|
|
return buf;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* add one element to a dynamic array */
|
|
void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem)
|
|
{
|
|
int nb, nb_alloc;
|
|
unsigned long *tab;
|
|
|
|
nb = *nb_ptr;
|
|
tab = *tab_ptr;
|
|
if ((nb & (nb - 1)) == 0) {
|
|
if (nb == 0)
|
|
nb_alloc = 1;
|
|
else
|
|
nb_alloc = nb * 2;
|
|
tab = av_realloc(tab, nb_alloc * sizeof(unsigned long));
|
|
*tab_ptr = tab;
|
|
}
|
|
tab[nb++] = elem;
|
|
*nb_ptr = nb;
|
|
}
|
|
|
|
time_t mktimegm(struct tm *tm)
|
|
{
|
|
time_t t;
|
|
|
|
int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
|
|
|
|
if (m < 3) {
|
|
m += 12;
|
|
y--;
|
|
}
|
|
|
|
t = 86400 *
|
|
(d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + y / 400 - 719469);
|
|
|
|
t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
|
|
|
|
return t;
|
|
}
|
|
|
|
#define ISLEAP(y) (((y) % 4 == 0) && (((y) % 100) != 0 || ((y) % 400) == 0))
|
|
#define LEAPS_COUNT(y) ((y)/4 - (y)/100 + (y)/400)
|
|
|
|
/* this is our own gmtime_r. it differs from its POSIX counterpart in a
|
|
couple of places, though. */
|
|
struct tm *brktimegm(time_t secs, struct tm *tm)
|
|
{
|
|
int days, y, ny, m;
|
|
int md[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
|
|
|
|
days = secs / 86400;
|
|
secs %= 86400;
|
|
tm->tm_hour = secs / 3600;
|
|
tm->tm_min = (secs % 3600) / 60;
|
|
tm->tm_sec = secs % 60;
|
|
|
|
/* oh well, may be someone some day will invent a formula for this stuff */
|
|
y = 1970; /* start "guessing" */
|
|
while (days >= (ISLEAP(y)?366:365)) {
|
|
ny = (y + days/366);
|
|
days -= (ny - y) * 365 + LEAPS_COUNT(ny - 1) - LEAPS_COUNT(y - 1);
|
|
y = ny;
|
|
}
|
|
md[1] = ISLEAP(y)?29:28;
|
|
for (m=0; days >= md[m]; m++)
|
|
days -= md[m];
|
|
|
|
tm->tm_year = y; /* unlike gmtime_r we store complete year here */
|
|
tm->tm_mon = m+1; /* unlike gmtime_r tm_mon is from 1 to 12 */
|
|
tm->tm_mday = days+1;
|
|
|
|
return tm;
|
|
}
|
|
|
|
/* get a positive number between n_min and n_max, for a maximum length
|
|
of len_max. Return -1 if error. */
|
|
static int date_get_num(const char **pp,
|
|
int n_min, int n_max, int len_max)
|
|
{
|
|
int i, val, c;
|
|
const char *p;
|
|
|
|
p = *pp;
|
|
val = 0;
|
|
for(i = 0; i < len_max; i++) {
|
|
c = *p;
|
|
if (!isdigit(c))
|
|
break;
|
|
val = (val * 10) + c - '0';
|
|
p++;
|
|
}
|
|
/* no number read ? */
|
|
if (p == *pp)
|
|
return -1;
|
|
if (val < n_min || val > n_max)
|
|
return -1;
|
|
*pp = p;
|
|
return val;
|
|
}
|
|
|
|
/* small strptime for ffmpeg */
|
|
const char *small_strptime(const char *p, const char *fmt,
|
|
struct tm *dt)
|
|
{
|
|
int c, val;
|
|
|
|
for(;;) {
|
|
c = *fmt++;
|
|
if (c == '\0') {
|
|
return p;
|
|
} else if (c == '%') {
|
|
c = *fmt++;
|
|
switch(c) {
|
|
case 'H':
|
|
val = date_get_num(&p, 0, 23, 2);
|
|
if (val == -1)
|
|
return NULL;
|
|
dt->tm_hour = val;
|
|
break;
|
|
case 'M':
|
|
val = date_get_num(&p, 0, 59, 2);
|
|
if (val == -1)
|
|
return NULL;
|
|
dt->tm_min = val;
|
|
break;
|
|
case 'S':
|
|
val = date_get_num(&p, 0, 59, 2);
|
|
if (val == -1)
|
|
return NULL;
|
|
dt->tm_sec = val;
|
|
break;
|
|
case 'Y':
|
|
val = date_get_num(&p, 0, 9999, 4);
|
|
if (val == -1)
|
|
return NULL;
|
|
dt->tm_year = val - 1900;
|
|
break;
|
|
case 'm':
|
|
val = date_get_num(&p, 1, 12, 2);
|
|
if (val == -1)
|
|
return NULL;
|
|
dt->tm_mon = val - 1;
|
|
break;
|
|
case 'd':
|
|
val = date_get_num(&p, 1, 31, 2);
|
|
if (val == -1)
|
|
return NULL;
|
|
dt->tm_mday = val;
|
|
break;
|
|
case '%':
|
|
goto match;
|
|
default:
|
|
return NULL;
|
|
}
|
|
} else {
|
|
match:
|
|
if (c != *p)
|
|
return NULL;
|
|
p++;
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|