1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 #define _RTL_CRC_C_ "$Revision: 1.3 $"
25
26 #include <sal/types.h>
27 #include <rtl/crc.h>
28
29 /*========================================================================
30 *
31 * rtl_crc32Table (CRC polynomial 0xEDB88320).
32 *
33 *======================================================================*/
34 static const sal_uInt32 rtl_crc32Table[256] =
35 {
36 /* 0 */
37 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
38 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
39 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
40 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
41
42 /* 1 */
43 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
44 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
45 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
46 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
47
48 /* 2 */
49 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
50 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
51 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
52 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
53
54 /* 3 */
55 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
56 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
57 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
58 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
59
60 /* 4 */
61 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
62 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
63 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
64 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
65
66 /* 5 */
67 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
68 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
69 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
70 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
71
72 /* 6 */
73 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
74 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
75 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
76 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
77
78 /* 7 */
79 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
80 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
81 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
82 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
83
84 /* 8 */
85 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
86 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
87 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
88 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
89
90 /* 9 */
91 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
92 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
93 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
94 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
95
96 /* A */
97 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
98 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
99 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
100 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
101
102 /* B */
103 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
104 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
105 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
106 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
107
108 /* C */
109 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
110 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
111 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
112 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
113
114 /* D */
115 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
116 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
117 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
118 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
119
120 /* E */
121 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
122 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
123 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
124 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
125
126 /* F */
127 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
128 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
129 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
130 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
131 };
132
133 /*========================================================================
134 *
135 * rtl_crc32 implementation.
136 *
137 *======================================================================*/
138 #define UPDCRC32(crc, octet) \
139 (rtl_crc32Table[((crc) ^ (octet)) & 0xff] ^ ((crc) >> 8))
140
141 /*
142 * rtl_crc32.
143 */
rtl_crc32(sal_uInt32 Crc,const void * Data,sal_uInt32 DatLen)144 sal_uInt32 SAL_CALL rtl_crc32 (
145 sal_uInt32 Crc,
146 const void *Data, sal_uInt32 DatLen)
147 {
148 if (Data)
149 {
150 register const sal_uInt8 *p = (const sal_uInt8 *)Data;
151 register const sal_uInt8 *q = p + DatLen;
152
153 Crc = ~Crc;
154 while (p < q)
155 Crc = UPDCRC32(Crc, *(p++));
156 Crc = ~Crc;
157 }
158 return Crc;
159 }
160
161