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Dir cache: Fix resume of relative path playlists.

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Slightly modified from original patch by Fabrice Bellard.

Change-Id: I9ae04fa460f0f1b9c616e6f99505d4c5d4358f68
This commit is contained in:
James D. Smith 2021-09-18 21:09:24 -06:00 • committed by Solomon Peachy
parent 67716c6b46
commit 760277e096
3 changed files with 57 additions and 4 deletions
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51
firmware/common/pathfuncs.c
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@ -340,6 +340,57 @@ void path_correct_separators(char *dstpath, const char *path)
strcpy(dstp, p);
}
/* Remove dot segments from the path
*
* 'path' and 'dstpath' may either be the same buffer or non-overlapping
*/
void path_remove_dot_segments (char *dstpath, const char *path)
{
char *dstp = dstpath;
char *odstp = dstpath;
const char *p = path;
while (*p)
{
if (p[0] == '.' && p[1] == PATH_SEPCH)
p += 2;
else if (p[0] == '.' && p[1] == '.' && p[2] == PATH_SEPCH)
p += 3;
else if (p[0] == PATH_SEPCH && p[1] == '.' && p[2] == PATH_SEPCH)
p += 2;
else if (p[0] == PATH_SEPCH && p[1] == '.' && !p[2])
{
*dstp++ = PATH_SEPCH;
break;
}
else if (p[0] == PATH_SEPCH && p[1] == '.' &&
p[2] == '.' && p[3] == PATH_SEPCH)
{
dstp = odstp;
p += 3;
}
else if (p[0] == PATH_SEPCH && p[1] == '.' && p[2] == '.' && !p[3])
{
dstp = odstp;
*dstp++ = PATH_SEPCH;
break;
}
else if (p[0] == '.' && !p[1])
break;
else if (p[0] == '.' && p[1] == '.' && !p[2])
break;
else
{
odstp = dstp;
if (p[0] == PATH_SEPCH)
*dstp++ = *p++;
while (p[0] && p[0] != PATH_SEPCH)
*dstp++ = *p++;
}
}
*dstp = 0;
}
/* Appends one path to another, adding separators between components if needed.
* Return value and behavior is otherwise as strlcpy so that truncation may be
* detected.