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author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-09-05 10:11:54 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-09-05 10:11:54 +0200 |
commit | 88e132b2a8a6b50c19d6384403326081ef791d58 (patch) | |
tree | e4480b7abe780ee7a95b8c5406c20aec8d07c39f /lib | |
parent | 6b0233be3886293f8db285ada525ad6da8b9c32f (diff) | |
parent | 551b412b16fa5e22d040cc49cd97cac1cc8029fc (diff) | |
download | barebox-88e132b2a8a6b50c19d6384403326081ef791d58.tar.gz barebox-88e132b2a8a6b50c19d6384403326081ef791d58.tar.xz |
Merge branch 'for-next/ubifs'
Diffstat (limited to 'lib')
-rw-r--r-- | lib/decompress_inflate.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c index 5c1ebb6850..d5ea01ad56 100644 --- a/lib/decompress_inflate.c +++ b/lib/decompress_inflate.c @@ -183,4 +183,43 @@ gunzip_nomem1: return rc; /* returns Z_OK (0) if successful */ } +int deflate_decompress(struct z_stream_s *stream, const u8 *src, unsigned int slen, u8 *dst, + unsigned int *dlen) +{ + + int ret = 0; + + ret = zlib_inflateReset(stream); + if (ret != Z_OK) { + ret = -EINVAL; + goto out; + } + + stream->next_in = (u8 *)src; + stream->avail_in = slen; + stream->next_out = (u8 *)dst; + stream->avail_out = *dlen; + + ret = zlib_inflate(stream, Z_SYNC_FLUSH); + /* + * Work around a bug in zlib, which sometimes wants to taste an extra + * byte when being used in the (undocumented) raw deflate mode. + * (From USAGI). + */ + if (ret == Z_OK && !stream->avail_in && stream->avail_out) { + u8 zerostuff = 0; + stream->next_in = &zerostuff; + stream->avail_in = 1; + ret = zlib_inflate(stream, Z_FINISH); + } + if (ret != Z_STREAM_END) { + ret = -EINVAL; + goto out; + } + ret = 0; + *dlen = stream->total_out; +out: + return ret; +} + #define decompress gunzip |