diff options
Diffstat (limited to 'libavformat/cutils.c')
-rw-r--r-- | libavformat/cutils.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/libavformat/cutils.c b/libavformat/cutils.c index 74d66e5..c31e5b5 100644 --- a/libavformat/cutils.c +++ b/libavformat/cutils.c @@ -128,3 +128,112 @@ void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long 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; +} + +/* 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; +} + |