1 /**************************************************************************
2 *
3 * Copyright 2008 VMware, Inc.
4 * All Rights Reserved.
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8 * "Software"), to deal in the Software without restriction, including
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11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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26 **************************************************************************/
27
28 /**
29 * @file
30 * CRC32 implementation.
31 *
32 * @author Jose Fonseca
33 */
34
35
36 #include "crc32.h"
37 #ifdef HAVE_ZLIB
38 #include <zlib.h>
39 uint32_t
util_hash_crc32(const void * data,size_t size)40 util_hash_crc32(const void *data, size_t size)
41 {
42 return ~crc32_z(0, data, size);
43 }
44 #else
45
46
47 static const uint32_t
48 util_crc32_table[256] = {
49 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
50 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
51 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
52 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
53 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
54 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
55 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
56 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
57 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
58 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
59 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
60 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
61 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
62 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
63 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
64 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
65 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
66 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
67 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
68 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
69 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
70 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
71 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
72 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
73 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
74 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
75 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
76 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
77 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
78 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
79 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
80 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
81 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
82 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
83 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
84 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
85 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
86 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
87 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
88 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
89 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
90 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
91 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
92 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
93 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
94 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
95 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
96 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
97 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
98 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
99 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
100 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
101 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
102 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
103 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
104 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
105 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
106 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
107 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
108 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
109 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
110 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
111 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
112 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
113 };
114
115
116 /**
117 * @sa http://www.w3.org/TR/PNG/#D-CRCAppendix
118 */
119 uint32_t
util_hash_crc32(const void * data,size_t size)120 util_hash_crc32(const void *data, size_t size)
121 {
122 const uint8_t *p = data;
123 uint32_t crc = 0xffffffff;
124
125 while (size--)
126 crc = util_crc32_table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
127
128 return crc;
129 }
130 #endif
131