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authorFabrice Bellard <fabrice@bellard.org>2003-09-08 21:20:55 +0000
committerFabrice Bellard <fabrice@bellard.org>2003-09-08 21:20:55 +0000
commitf71869a4db1d20dd93cb6a37ba8ef1249812c864 (patch)
tree5a3cf06e8089682b559e461f8de8ab20f488b0fc /libavformat/cutils.c
parent742d87d633d20f2b1dcd7f0d2427f15cb6ac40c6 (diff)
downloadffmpeg-f71869a4db1d20dd93cb6a37ba8ef1249812c864.tar.gz
simpler strptime - added os_support.[ch] - moved localtime_r to os_support.c
Originally committed as revision 2228 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/cutils.c')
-rw-r--r--libavformat/cutils.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/libavformat/cutils.c b/libavformat/cutils.c
index 74d66e5618..c31e5b5c17 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;
+}
+