crc32.h

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/*
    ------------------------------------------------------------------------------------
    LICENSE:
    ------------------------------------------------------------------------------------
    This file is part of EVEmu: EVE Online Server Emulator
    Copyright 2006 - 2021 The EVEmu Team
    For the latest information visit https://evemu.dev
    ------------------------------------------------------------------------------------
    This program is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by the Free Software
    Foundation; either version 2 of the License, or (at your option) any later
    version.

    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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License along with
    this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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    http://www.gnu.org/copyleft/lesser.txt.
    ------------------------------------------------------------------------------------
    Author:        Zhur
*/

#ifndef __UTILS__CRC32_H__INCL__
#define __UTILS__CRC32_H__INCL__

extern const uint32 CRC32_LOOKUP_TABLE[ 0x100 ];

class CRC32
{
public:
    // one buffer CRC32
    static uint32 Generate( const uint8* buf, size_t bufsize ) { return Finish( Update( buf, bufsize ) ); }
    static uint32 GenerateNoFlip( const uint8* buf, size_t bufsize ) { return Update( buf, bufsize ); }

    // Multiple buffer CRC32
    static uint32 Update( const uint8* buf, size_t bufsize, uint32 crc32 = 0xFFFFFFFF );
    static uint32 Finish( uint32 crc32 ) { return ~crc32; }
};

#endif /* !__UTILS__CRC32_H__INCL__ */