1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/zlib/uncompr.c	Thu Sep 08 06:28:38 2011 +0300
     1.3 @@ -0,0 +1,61 @@
     1.4 +/* uncompr.c -- decompress a memory buffer
     1.5 + * Copyright (C) 1995-2003 Jean-loup Gailly.
     1.6 + * For conditions of distribution and use, see copyright notice in zlib.h
     1.7 + */
     1.8 +
     1.9 +/* @(#) $Id$ */
    1.10 +
    1.11 +#define ZLIB_INTERNAL
    1.12 +#include "zlib.h"
    1.13 +
    1.14 +/* ===========================================================================
    1.15 +     Decompresses the source buffer into the destination buffer.  sourceLen is
    1.16 +   the byte length of the source buffer. Upon entry, destLen is the total
    1.17 +   size of the destination buffer, which must be large enough to hold the
    1.18 +   entire uncompressed data. (The size of the uncompressed data must have
    1.19 +   been saved previously by the compressor and transmitted to the decompressor
    1.20 +   by some mechanism outside the scope of this compression library.)
    1.21 +   Upon exit, destLen is the actual size of the compressed buffer.
    1.22 +     This function can be used to decompress a whole file at once if the
    1.23 +   input file is mmap'ed.
    1.24 +
    1.25 +     uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
    1.26 +   enough memory, Z_BUF_ERROR if there was not enough room in the output
    1.27 +   buffer, or Z_DATA_ERROR if the input data was corrupted.
    1.28 +*/
    1.29 +int ZEXPORT uncompress (dest, destLen, source, sourceLen)
    1.30 +    Bytef *dest;
    1.31 +    uLongf *destLen;
    1.32 +    const Bytef *source;
    1.33 +    uLong sourceLen;
    1.34 +{
    1.35 +    z_stream stream;
    1.36 +    int err;
    1.37 +
    1.38 +    stream.next_in = (Bytef*)source;
    1.39 +    stream.avail_in = (uInt)sourceLen;
    1.40 +    /* Check for source > 64K on 16-bit machine: */
    1.41 +    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
    1.42 +
    1.43 +    stream.next_out = dest;
    1.44 +    stream.avail_out = (uInt)*destLen;
    1.45 +    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
    1.46 +
    1.47 +    stream.zalloc = (alloc_func)0;
    1.48 +    stream.zfree = (free_func)0;
    1.49 +
    1.50 +    err = inflateInit(&stream);
    1.51 +    if (err != Z_OK) return err;
    1.52 +
    1.53 +    err = inflate(&stream, Z_FINISH);
    1.54 +    if (err != Z_STREAM_END) {
    1.55 +        inflateEnd(&stream);
    1.56 +        if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
    1.57 +            return Z_DATA_ERROR;
    1.58 +        return err;
    1.59 +    }
    1.60 +    *destLen = stream.total_out;
    1.61 +
    1.62 +    err = inflateEnd(&stream);
    1.63 +    return err;
    1.64 +}