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author | Ricardo Ribalda Delgado <ricardo.ribalda@uam.es> | 2009-04-27 16:33:32 (GMT) |
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committer | Wolfgang Denk <wd@denx.de> | 2009-04-30 21:07:02 (GMT) |
commit | 35f6a943f7d92145d607c1d55f5c2e2eae5be630 (patch) | |
tree | 84de84b4681760b3b9f3fb40b366c90c8af99f25 /lib_generic/gunzip.c | |
parent | ccb71dfac94d4a9ef161a59a51b4f31d7d9e4747 (diff) | |
download | u-boot-fsl-qoriq-35f6a943f7d92145d607c1d55f5c2e2eae5be630.tar.xz |
lib_generic: gunzip: New function zunzip
Separate gunzip in
gunzip: Find the end of the header and call zunzip.
zunzip: Inflate gunzip block without header.
UBI fs blocks can be compresed in lzo, zlib or no-compression. The
current implementation of u-boot supported all the compressions but
there was a bug in the implementation of the zlib blocks.
UBIFS's Zlib blocks do not have header but they were compressed using
gunzip, a function used to decompress gunzip files/sectors with a
header.
This patch adds a new function zunzip that uncompress a zlib block with
no header.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@uam.es>
Diffstat (limited to 'lib_generic/gunzip.c')
-rw-r--r-- | lib_generic/gunzip.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/lib_generic/gunzip.c b/lib_generic/gunzip.c index 01a4031..d59a448 100644 --- a/lib_generic/gunzip.c +++ b/lib_generic/gunzip.c @@ -39,6 +39,8 @@ int gunzip(void *, int, unsigned char *, unsigned long *); void *zalloc(void *, unsigned, unsigned); void zfree(void *, void *, unsigned); +int zunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp, + int stoponerr, int offset); void *zalloc(void *x, unsigned items, unsigned size) { @@ -59,8 +61,7 @@ void zfree(void *x, void *addr, unsigned nb) int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp) { - z_stream s; - int r, i, flags; + int i, flags; /* skip header */ i = 10; @@ -84,6 +85,18 @@ int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp) return (-1); } + return zunzip(dst, dstlen, src, lenp, 1, i); +} + +/* + * Uncompress blocks compressed with zlib without headers + */ +int zunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp, + int stoponerr, int offset) +{ + z_stream s; + int r; + s.zalloc = zalloc; s.zfree = zfree; #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) @@ -95,14 +108,14 @@ int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp) r = inflateInit2(&s, -MAX_WBITS); if (r != Z_OK) { printf ("Error: inflateInit2() returned %d\n", r); - return (-1); + return -1; } - s.next_in = src + i; - s.avail_in = *lenp - i; + s.next_in = src + offset; + s.avail_in = *lenp - offset; s.next_out = dst; s.avail_out = dstlen; r = inflate(&s, Z_FINISH); - if (r != Z_STREAM_END) { + if ((r != Z_STREAM_END) && (stoponerr==1)) { printf ("Error: inflate() returned %d\n", r); inflateEnd(&s); return (-1); @@ -110,5 +123,5 @@ int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp) *lenp = s.next_out - (unsigned char *) dst; inflateEnd(&s); - return (0); + return 0; } |