mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-12-27 07:54:51 +01:00
24cb244d43
This was a _ton_ of changes, made 15 years ago, so there are probably some problems to work out still. Among others: Engine/Base/Stream.* was mostly abandoned and will need to be re-ported. Still, this is a pretty good start, and probably holds a world record for lines of changes or something. :)
55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
/* uncompr.c -- decompress a memory buffer
|
|
* Copyright (C) 1995-1998 Jean-loup Gailly.
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* @(#) $Id: uncompr.c,v 1.2 2002/02/18 06:05:43 icculus Exp $ */
|
|
|
|
#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.
|
|
This function can be used to decompress a whole file at once if the
|
|
input file is mmap'ed.
|
|
|
|
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 (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);
|
|
return err == Z_OK ? Z_BUF_ERROR : err;
|
|
}
|
|
*destLen = stream.total_out;
|
|
|
|
err = inflateEnd(&stream);
|
|
return err;
|
|
}
|