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applehttp: Add comments to make_absolute_url 

Originally committed as revision 25319 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Martin Storsjö 2010-10-02 21:59:16 +00:00
parent 9d229ef9e6
commit ae8c28db87
1 changed files with 4 additions and 0 deletions
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4
libavformat/applehttp.c
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@ -90,18 +90,21 @@ static void make_absolute_url(char *buf, int size, const char *base,
const char *rel)
{
char *sep;
/* If rel actually is an absolute url, just copy it */
if (!base || strstr(rel, "://") || rel[0] == '/') {
av_strlcpy(buf, rel, size);
return;
}
if (base != buf)
av_strlcpy(buf, base, size);
/* Remove the file name from the base url */
sep = strrchr(buf, '/');
if (sep)
sep[1] = '\0';
else
buf[0] = '\0';
while (av_strstart(rel, "../", NULL) && sep) {
/* Remove the path delimiter at the end */
sep[0] = '\0';
sep = strrchr(buf, '/');
/* If the next directory name to pop off is "..", break here */
@ -110,6 +113,7 @@ static void make_absolute_url(char *buf, int size, const char *base,
av_strlcat(buf, "/", size);
break;
}
/* Cut off the directory name */
if (sep)
sep[1] = '\0';
else