lib/crc32.c

   1 /*
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *    This product includes software developed by the University of
  16  *    California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <babeltrace/crc32.h>
  35
  36 #define CRC(crc, ch)     (crc = (crc >> 8) ^ crctab[(crc ^ (ch)) & 0xff])
  37
  38 /* generated using the AUTODIN II polynomial
  39  *      x^32 + x^26 + x^23 + x^22 + x^16 +
  40  *      x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + 1
  41  */
  42 static const uint32_t crctab[256] = {
  43         0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
  44         0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
  45         0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  46         0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
  47         0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
  48         0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  49         0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
  50         0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
  51         0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  52         0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
  53         0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
  54         0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  55         0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
  56         0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
  57         0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  58         0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
  59         0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
  60         0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  61         0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
  62         0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
  63         0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  64         0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
  65         0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
  66         0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  67         0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
  68         0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
  69         0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  70         0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
  71         0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
  72         0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  73         0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
  74         0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
  75         0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  76         0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
  77         0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
  78         0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  79         0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
  80         0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
  81         0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  82         0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
  83         0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
  84         0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  85         0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
  86         0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
  87         0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  88         0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
  89         0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
  90         0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  91         0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
  92         0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
  93         0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  94         0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
  95         0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
  96         0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  97         0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
  98         0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
  99         0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
 100         0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
 101         0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
 102         0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
 103         0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
 104         0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
 105         0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
 106         0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
 107 };
 108
 109 int crc32(int fd, uint32_t *crc)
 110 {
 111         int nr;
 112         uint32_t _crc = ~0;
 113         char buf[BUFSIZ], *p;
 114
 115         if (fd < 0 || !crc) {
 116                 goto error;
 117         }
 118
 119         while ((nr = read(fd, buf, sizeof(buf))) > 0) {
 120                 for (p = buf; nr--; ++p) {
 121                         CRC(_crc, *p);
 122                 }
 123         }
 124
 125         if (nr < 0) {
 126                 goto error;
 127         }
 128
 129         *crc = ~_crc;
 130         return 0;
 131
 132 error:
 133         return -1;
 134 }