lavu/parseutils: add av_small_strptime()

Make internal small_strptime() function public, and use it in place of
strptime().
This allows to avoid a dependency on strptime() on systems which do not
support it.

In particular, fix trac ticket #992.

3 files changed, 31 insertions, 16 deletions

diff --git a/libavutil/parseutils.c b/libavutil/parseutils.c
index 5e2644cb4f..2440d27d64 100644
--- a/libavutil/parseutils.c
+++ b/libavutil/parseutils.c
@@ -438,17 +438,7 @@ static int date_get_num(const char **pp,
     return val;
 }
 
-/**
- * Parse the input string p according to the format string fmt and
- * store its results in the structure dt.
- * This implementation supports only a subset of the formats supported
- * by the standard strptime().
- *
- * @return a pointer to the first character not processed in this
- * function call, or NULL in case the function fails to match all of
- * the fmt string and therefore an error occurred
- */
-static char *small_strptime(const char *p, const char *fmt, struct tm *dt)
+char *av_small_strptime(const char *p, const char *fmt, struct tm *dt)
 {
     int c, val;
 
@@ -558,7 +548,7 @@ int av_parse_time(int64_t *timeval, const char *timestr, int duration)
 
         /* parse the year-month-day part */
         for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) {
-            q = small_strptime(p, date_fmt[i], &dt);
+            q = av_small_strptime(p, date_fmt[i], &dt);
             if (q)
                 break;
         }
@@ -576,7 +566,7 @@ int av_parse_time(int64_t *timeval, const char *timestr, int duration)
 
         /* parse the hour-minute-second part */
         for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) {
-            q = small_strptime(p, time_fmt[i], &dt);
+            q = av_small_strptime(p, time_fmt[i], &dt);
             if (q)
                 break;
         }
@@ -587,7 +577,7 @@ int av_parse_time(int64_t *timeval, const char *timestr, int duration)
             ++p;
         }
         /* parse timestr as HH:MM:SS */
-        q = small_strptime(p, time_fmt[0], &dt);
+        q = av_small_strptime(p, time_fmt[0], &dt);
         if (!q) {
             /* parse timestr as S+ */
             dt.tm_sec = strtol(p, (void *)&q, 10);
diff --git a/libavutil/parseutils.h b/libavutil/parseutils.h
index 7c7a91f5dd..da7d345b54 100644
--- a/libavutil/parseutils.h
+++ b/libavutil/parseutils.h
@@ -133,6 +133,31 @@ int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
 int av_parse_time(int64_t *timeval, const char *timestr, int duration);
 
 /**
+ * Parse the input string p according to the format string fmt and
+ * store its results in the structure dt.
+ * This implementation supports only a subset of the formats supported
+ * by the standard strptime().
+ *
+ * In particular it actually supports the parameters:
+ * - %H: the hour as a decimal number, using a 24-hour clock, in the
+ * range '00' through '23'
+ * - %M: the minute as a decimal number, using a 24-hour clock, in the
+ * range '00' through '59'
+ * - %S: the second as a decimal number, using a 24-hour clock, in the
+ * range '00' through '59'
+ * - %Y: the year as a decimal number, using the Gregorian calendar
+ * - %m: the month as a decimal number, in the range '1' through '12'
+ * - %d: the day of the month as a decimal number, in the range '1'
+ * through '31'
+ * - %%: a literal '%'
+ *
+ * @return a pointer to the first character not processed in this
+ * function call, or NULL in case the function fails to match all of
+ * the fmt string and therefore an error occurred
+ */
+char *av_small_strptime(const char *p, const char *fmt, struct tm *dt);
+
+/**
  * Attempt to find a specific tag in a URL.
  *
  * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
diff --git a/libavutil/version.h b/libavutil/version.h
index 535c1af7e3..dbfec109aa 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -39,8 +39,8 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 51
-#define LIBAVUTIL_VERSION_MINOR 71
-#define LIBAVUTIL_VERSION_MICRO 101
+#define LIBAVUTIL_VERSION_MINOR 72
+#define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \