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c40a57e5 AB |
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 | } |