Make parse_key_value from httpauth a common lavf internal function

Originally committed as revision 24832 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 54 insertions, 0 deletions

diff --git a/libavformat/utils.c b/libavformat/utils.c
index 3fe5eaf635..117179715c 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -3707,3 +3707,57 @@ int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
     return av_write_frame(dst, &local_pkt);
 }
 
+void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
+                        void *context)
+{
+    const char *ptr = str;
+
+    /* Parse key=value pairs. */
+    for (;;) {
+        const char *key;
+        char *dest = NULL, *dest_end;
+        int key_len, dest_len = 0;
+
+        /* Skip whitespace and potential commas. */
+        while (*ptr && (isspace(*ptr) || *ptr == ','))
+            ptr++;
+        if (!*ptr)
+            break;
+
+        key = ptr;
+
+        if (!(ptr = strchr(key, '=')))
+            break;
+        ptr++;
+        key_len = ptr - key;
+
+        callback_get_buf(context, key, key_len, &dest, &dest_len);
+        dest_end = dest + dest_len - 1;
+
+        if (*ptr == '\"') {
+            ptr++;
+            while (*ptr && *ptr != '\"') {
+                if (*ptr == '\\') {
+                    if (!ptr[1])
+                        break;
+                    if (dest && dest < dest_end)
+                        *dest++ = ptr[1];
+                    ptr += 2;
+                } else {
+                    if (dest && dest < dest_end)
+                        *dest++ = *ptr;
+                    ptr++;
+                }
+            }
+            if (*ptr == '\"')
+                ptr++;
+        } else {
+            for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
+                if (dest && dest < dest_end)
+                    *dest++ = *ptr;
+        }
+        if (dest)
+            *dest = 0;
+    }
+}
+