mirror of
https://github.com/KartKrewDev/RingRacers.git
synced 2025-10-30 08:01:28 +00:00
140 lines
4 KiB
C
140 lines
4 KiB
C
/*
|
|
* Copyright (c) 2000-2005 Marc Alexander Lehmann <schmorp@schmorp.de>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modifica-
|
|
* tion, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
|
|
* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
|
|
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
|
|
* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
|
|
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* the GNU General Public License version 2 (the "GPL"), in which case the
|
|
* provisions of the GPL are applicable instead of the above. If you wish to
|
|
* allow the use of your version of this file only under the terms of the
|
|
* GPL and not to allow others to use your version of this file under the
|
|
* BSD license, indicate your decision by deleting the provisions above and
|
|
* replace them with the notice and other provisions required by the GPL. If
|
|
* you do not delete the provisions above, a recipient may use your version
|
|
* of this file under either the BSD or the GPL.
|
|
*/
|
|
|
|
#include "lzfP.h"
|
|
|
|
#if AVOID_ERRNO
|
|
# define SET_ERRNO(n)
|
|
#else
|
|
# include <errno.h>
|
|
# define SET_ERRNO(n) errno = (n)
|
|
#endif
|
|
|
|
unsigned int
|
|
lzf_decompress (const void *const in_data, unsigned int in_len,
|
|
void *out_data, unsigned int out_len)
|
|
{
|
|
u8 const *ip = (const u8 *)in_data;
|
|
u8 *op = (u8 *)out_data;
|
|
u8 const *const in_end = ip + in_len;
|
|
u8 *const out_end = op + out_len;
|
|
|
|
do
|
|
{
|
|
unsigned int ctrl = *ip++;
|
|
|
|
if (ctrl < (1 << 5)) /* literal run */
|
|
{
|
|
ctrl++;
|
|
|
|
if (op + ctrl > out_end)
|
|
{
|
|
SET_ERRNO (E2BIG);
|
|
return 0;
|
|
}
|
|
|
|
#if CHECK_INPUT
|
|
if (ip + ctrl > in_end)
|
|
{
|
|
SET_ERRNO (EINVAL);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#if USE_MEMCPY
|
|
memcpy (op, ip, ctrl);
|
|
op += ctrl;
|
|
ip += ctrl;
|
|
#else
|
|
do
|
|
*op++ = *ip++;
|
|
while (--ctrl);
|
|
#endif
|
|
}
|
|
else /* back reference */
|
|
{
|
|
unsigned int len = ctrl >> 5;
|
|
|
|
u8 *ref = op - ((ctrl & 0x1f) << 8) - 1;
|
|
|
|
#if CHECK_INPUT
|
|
if (ip >= in_end)
|
|
{
|
|
SET_ERRNO (EINVAL);
|
|
return 0;
|
|
}
|
|
#endif
|
|
if (len == 7)
|
|
{
|
|
len += *ip++;
|
|
#if CHECK_INPUT
|
|
if (ip >= in_end)
|
|
{
|
|
SET_ERRNO (EINVAL);
|
|
return 0;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
ref -= *ip++;
|
|
|
|
if (op + len + 2 > out_end)
|
|
{
|
|
SET_ERRNO (E2BIG);
|
|
return 0;
|
|
}
|
|
|
|
if (ref < (u8 *)out_data)
|
|
{
|
|
SET_ERRNO (EINVAL);
|
|
return 0;
|
|
}
|
|
|
|
*op++ = *ref++;
|
|
*op++ = *ref++;
|
|
|
|
do
|
|
*op++ = *ref++;
|
|
while (--len);
|
|
}
|
|
}
|
|
while (ip < in_end);
|
|
|
|
return op - (u8 *)out_data;
|
|
}
|
|
|