openjpeg/jpwl/crc.h

84 lines
3.1 KiB
C

/*
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
* Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
* Copyright (c) 2005, Hervé Drolon, FreeImage Team
* Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
* Copyright (c) 2005-2006, Dept. of Electronic and Information Engineering, Universita' degli Studi di Perugia, Italy
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
#ifdef USE_JPWL
/**
@file crc.h
@brief Functions used to compute the 16- and 32-bit CRC of byte arrays
*/
#ifndef __CRC16_HEADER__
#define __CRC16_HEADER__
/** file: CRC16.HPP
*
* CRC - Cyclic Redundancy Check (16-bit)
*
* A CRC-checksum is used to be sure, the data hasn't changed or is false.
* To create a CRC-checksum, initialise a check-variable (unsigned short),
* and set this to zero. Than call for every byte in the file (e.g.) the
* procedure updateCRC16 with this check-variable as the first parameter,
* and the byte as the second. At the end, the check-variable contains the
* CRC-checksum.
*
* implemented by Michael Neumann, 14.06.1998
*
*/
void updateCRC16(unsigned short *, unsigned char);
#endif /* __CRC16_HEADER__ */
#ifndef __CRC32_HEADER__
#define __CRC32_HEADER__
/** file: CRC32.HPP
*
* CRC - Cyclic Redundancy Check (32-bit)
*
* A CRC-checksum is used to be sure, the data hasn't changed or is false.
* To create a CRC-checksum, initialise a check-variable (unsigned short),
* and set this to zero. Than call for every byte in the file (e.g.) the
* procedure updateCRC32 with this check-variable as the first parameter,
* and the byte as the second. At the end, the check-variable contains the
* CRC-checksum.
*
* implemented by Michael Neumann, 14.06.1998
*
*/
void updateCRC32(unsigned long *, unsigned char);
#endif /* __CRC32_HEADER__ */
#endif /* USE_JPWL */