mirror of
https://github.com/ZDoom/gzdoom-gles.git
synced 2024-11-10 23:01:59 +00:00
52 lines
2.2 KiB
C
52 lines
2.2 KiB
C
/*
|
|
** m_crc32.h
|
|
** Simple interface to zlib's CRC table
|
|
**
|
|
**---------------------------------------------------------------------------
|
|
** Copyright 1998-2006 Randy Heit
|
|
** All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
** INCIDENTAL, SPECIAL, 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 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
**---------------------------------------------------------------------------
|
|
**
|
|
*/
|
|
|
|
#include <zlib.h>
|
|
#include "basictypes.h"
|
|
|
|
// zlib includes some CRC32 stuff, so just use that
|
|
|
|
inline const uint32_t *GetCRCTable () { return (const uint32_t *)get_crc_table(); }
|
|
inline uint32_t CalcCRC32 (const uint8_t *buf, unsigned int len)
|
|
{
|
|
return crc32 (0, buf, len);
|
|
}
|
|
inline uint32_t AddCRC32 (uint32_t crc, const uint8_t *buf, unsigned int len)
|
|
{
|
|
return crc32 (crc, buf, len);
|
|
}
|
|
inline uint32_t CRC1 (uint32_t crc, const uint8_t c, const uint32_t *crcTable)
|
|
{
|
|
return crcTable[(crc & 0xff) ^ c] ^ (crc >> 8);
|
|
}
|