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author | cvs2git <rtems-devel@rtems.org> | 2011-03-18 10:11:42 +0000 |
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committer | cvs2git <rtems-devel@rtems.org> | 2011-03-18 10:11:42 +0000 |
commit | e371ea9949ecc8897f4cb34437cc6590a0fc51f0 (patch) | |
tree | e5d17499fe12fc87c9697d681b63b062e9cbb65a /cpukit/zlib/uncompr.c | |
parent | Ensure all version instances say 4.10. (diff) | |
download | rtems-4652f297baed549387c9b886c876f5135b909663.tar.bz2 |
This commit was manufactured by cvs2svn to create tag 'rtems-4-10-0'.4.10.0
Sprout from rtems-4-10-branch 2011-02-08 15:56:24 UTC Joel Sherrill <joel.sherrill@OARcorp.com> 'Ensure all version instances say 4.10.'
Cherrypick from rtems-4-10-branch 2011-03-18 10:11:41 UTC cvs2git <rtems-devel@rtems.org> 'This commit was manufactured by cvs2svn to create branch':
cpukit/zlib/ChangeLog
cpukit/zlib/ChangeLog.zlib
cpukit/zlib/FAQ
cpukit/zlib/Makefile.am
cpukit/zlib/README
cpukit/zlib/adler32.c
cpukit/zlib/compress.c
cpukit/zlib/crc32.c
cpukit/zlib/deflate.c
cpukit/zlib/deflate.h
cpukit/zlib/doc/algorithm.txt
cpukit/zlib/gzclose.c
cpukit/zlib/gzguts.h
cpukit/zlib/gzlib.c
cpukit/zlib/gzread.c
cpukit/zlib/gzwrite.c
cpukit/zlib/infback.c
cpukit/zlib/inffast.c
cpukit/zlib/inflate.c
cpukit/zlib/inflate.h
cpukit/zlib/inftrees.c
cpukit/zlib/inftrees.h
cpukit/zlib/trees.c
cpukit/zlib/uncompr.c
cpukit/zlib/zconf.h
cpukit/zlib/zlib.3
cpukit/zlib/zlib.h
cpukit/zlib/zutil.c
cpukit/zlib/zutil.h
testsuites/libtests/mathf/.cvsignore
testsuites/libtests/mathf/Makefile.am
testsuites/libtests/mathf/domathf.c
testsuites/libtests/mathf/init.c
testsuites/libtests/mathf/mathf.scn
Diffstat (limited to 'cpukit/zlib/uncompr.c')
-rw-r--r-- | cpukit/zlib/uncompr.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/cpukit/zlib/uncompr.c b/cpukit/zlib/uncompr.c new file mode 100644 index 0000000000..ad98be3a5d --- /dev/null +++ b/cpukit/zlib/uncompr.c @@ -0,0 +1,59 @@ +/* uncompr.c -- decompress a memory buffer + * Copyright (C) 1995-2003, 2010 Jean-loup Gailly. + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +/* @(#) $Id$ */ + +#define ZLIB_INTERNAL +#include "zlib.h" + +/* =========================================================================== + Decompresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total + size of the destination buffer, which must be large enough to hold the + entire uncompressed data. (The size of the uncompressed data must have + been saved previously by the compressor and transmitted to the decompressor + by some mechanism outside the scope of this compression library.) + Upon exit, destLen is the actual size of the compressed buffer. + + uncompress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer, or Z_DATA_ERROR if the input data was corrupted. +*/ +int ZEXPORT uncompress (dest, destLen, source, sourceLen) + Bytef *dest; + uLongf *destLen; + const Bytef *source; + uLong sourceLen; +{ + z_stream stream; + int err; + + stream.next_in = (Bytef*)source; + stream.avail_in = (uInt)sourceLen; + /* Check for source > 64K on 16-bit machine: */ + if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR; + + stream.next_out = dest; + stream.avail_out = (uInt)*destLen; + if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR; + + stream.zalloc = (alloc_func)0; + stream.zfree = (free_func)0; + + err = inflateInit(&stream); + if (err != Z_OK) return err; + + err = inflate(&stream, Z_FINISH); + if (err != Z_STREAM_END) { + inflateEnd(&stream); + if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0)) + return Z_DATA_ERROR; + return err; + } + *destLen = stream.total_out; + + err = inflateEnd(&stream); + return err; +} |