mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-12-25 15:14:51 +01:00
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* Copyright (c) 2002-2012 Croteam Ltd.
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of version 2 of the GNU General Public License as published by
|
|
the Free Software Foundation
|
|
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along
|
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
|
|
|
|
#ifndef SE_INCL_CRC_H
|
|
#define SE_INCL_CRC_H
|
|
#ifdef PRAGMA_ONCE
|
|
#pragma once
|
|
#endif
|
|
|
|
extern ENGINE_API ULONG crc_aulCRCTable[256];
|
|
|
|
// begin crc calculation
|
|
inline void CRC_Start(ULONG &ulCRC) { ulCRC = 0xFFFFFFFF; };
|
|
|
|
// add data to a crc value
|
|
inline void CRC_AddBYTE( ULONG &ulCRC, UBYTE ub)
|
|
{
|
|
ulCRC = (ulCRC>>8)^crc_aulCRCTable[UBYTE(ulCRC)^ub];
|
|
};
|
|
|
|
inline void CRC_AddWORD( ULONG &ulCRC, UBYTE uw)
|
|
{
|
|
CRC_AddBYTE(ulCRC, UBYTE(uw>> 8));
|
|
CRC_AddBYTE(ulCRC, UBYTE(uw>> 0));
|
|
};
|
|
|
|
inline void CRC_AddLONG( ULONG &ulCRC, ULONG ul)
|
|
{
|
|
CRC_AddBYTE(ulCRC, UBYTE(ul>>24));
|
|
CRC_AddBYTE(ulCRC, UBYTE(ul>>16));
|
|
CRC_AddBYTE(ulCRC, UBYTE(ul>> 8));
|
|
CRC_AddBYTE(ulCRC, UBYTE(ul>> 0));
|
|
};
|
|
|
|
inline void CRC_AddFLOAT(ULONG &ulCRC, FLOAT f)
|
|
{
|
|
CRC_AddLONG(ulCRC, *(ULONG*)&f);
|
|
};
|
|
|
|
// add memory block to a CRC value
|
|
inline void CRC_AddBlock(ULONG &ulCRC, UBYTE *pubBlock, ULONG ulSize)
|
|
{
|
|
for( INDEX i=0; i<ulSize; i++) CRC_AddBYTE( ulCRC, pubBlock[i]);
|
|
};
|
|
|
|
// end crc calculation
|
|
inline void CRC_Finish(ULONG &ulCRC) { ulCRC ^= 0xFFFFFFFF; };
|
|
|
|
#endif /* include-once check. */
|
|
|