Return to crc32.h CVS log

Up to [DVB] / multiplexer

Annotation of multiplexer/crc32.h, revision 1.1

1.1     ! oskar       1: /*
        !             2:  * cyclic redundancy check 32 bit
        !             3:  * Copyright (C) 1999 Christian Wolff, 2004 Oskar Schirmer
        !             4:  * for Convergence Integrated Media GmbH (http://www.convergence.de)
        !             5:  *
        !             6:  * This program is free software; you can redistribute it and/or modify
        !             7:  * it under the terms of the GNU General Public License as published by
        !             8:  * the Free Software Foundation; either version 2 of the License, or
        !             9:  * (at your option) any later version.
        !            10:  *
        !            11:  * This program is distributed in the hope that it will be useful,
        !            12:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14:  * GNU General Public License for more details.
        !            15:  *
        !            16:  * You should have received a copy of the GNU General Public License
        !            17:  * along with this program; if not, write to the Free Software
        !            18:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
        !            19:  */
        !            20: 
        !            21: #define MSBFCOEFF(x) | (1UL << x)
        !            22: 
        !            23: #define POLYNOMIAL_32_MSBF 0 \
        !            24:     MSBFCOEFF(0)  \
        !            25:     MSBFCOEFF(1)  \
        !            26:     MSBFCOEFF(2)  \
        !            27:     MSBFCOEFF(4)  \
        !            28:     MSBFCOEFF(5)  \
        !            29:     MSBFCOEFF(7)  \
        !            30:     MSBFCOEFF(8)  \
        !            31:     MSBFCOEFF(10) \
        !            32:     MSBFCOEFF(11) \
        !            33:     MSBFCOEFF(12) \
        !            34:     MSBFCOEFF(16) \
        !            35:     MSBFCOEFF(22) \
        !            36:     MSBFCOEFF(23) \
        !            37:     MSBFCOEFF(26)
        !            38: 
        !            39: #define CRC_INIT_32   ((u_int32_t)(-1))
        !            40: 
        !            41: #define update_crc_32(crc, data) \
        !            42:     ((crc << 8) ^ crc_32_table[((int)(crc >> 24) ^ (data)) & 0xFF])
        !            43: 
        !            44: extern u_int32_t crc_32_table[256];
        !            45: 
        !            46: extern void gen_crc32_table();
        !            47: 
        !            48: extern u_int32_t update_crc_32_block(u_int32_t crc, char *data_block_ptr, int data_block_size);
        !            49: 
        !            50: extern void crc32_calc (char *data,
        !            51:     int size,
        !            52:     char *crc);
        !            53: