2 * Copyright (c) 2001-2003, David Janssens
3 * Copyright (c) 2002-2003, Yannick Verschueren
4 * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
5 * Copyright (c) 2005, Herv� Drolon, FreeImage Team
6 * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
7 * Copyright (c) 2005-2006, Dept. of Electronic and Information Engineering, Universita' degli Studi di Perugia, Italy
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36 @brief Functions used to compute the 16- and 32-bit CRC of byte arrays
40 #ifndef __CRC16_HEADER__
41 #define __CRC16_HEADER__
45 * CRC - Cyclic Redundancy Check (16-bit)
47 * A CRC-checksum is used to be sure, the data hasn't changed or is false.
48 * To create a CRC-checksum, initialise a check-variable (unsigned short),
49 * and set this to zero. Than call for every byte in the file (e.g.) the
50 * procedure updateCRC16 with this check-variable as the first parameter,
51 * and the byte as the second. At the end, the check-variable contains the
54 * implemented by Michael Neumann, 14.06.1998
57 void updateCRC16(unsigned short *, unsigned char);
59 #endif /* __CRC16_HEADER__ */
62 #ifndef __CRC32_HEADER__
63 #define __CRC32_HEADER__
67 * CRC - Cyclic Redundancy Check (32-bit)
69 * A CRC-checksum is used to be sure, the data hasn't changed or is false.
70 * To create a CRC-checksum, initialise a check-variable (unsigned short),
71 * and set this to zero. Than call for every byte in the file (e.g.) the
72 * procedure updateCRC32 with this check-variable as the first parameter,
73 * and the byte as the second. At the end, the check-variable contains the
76 * implemented by Michael Neumann, 14.06.1998
79 void updateCRC32(unsigned long *, unsigned char);
81 #endif /* __CRC32_HEADER__ */