Initial implementation of the debuginfo API
[babeltrace.git] / 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 }
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