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  1. Project Clover database Wed Oct 31 2018 15:13:58 GMT
  2. Package org.apache.tools.bzip2

File CRC.java

 

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Classes

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CRC 32 14 10 27
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1    /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements. See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License. You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10    *
11    * Unless required by applicable law or agreed to in writing, software
12    * distributed under the License is distributed on an "AS IS" BASIS,
13    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14    * See the License for the specific language governing permissions and
15    * limitations under the License.
16    *
17    */
18   
19    /*
20    * This package is based on the work done by Keiron Liddle, Aftex Software
21    * <keiron@aftexsw.com> to whom the Ant project is very grateful for his
22    * great code.
23    */
24   
25    package org.apache.tools.bzip2;
26   
27    /**
28    * A simple class the hold and calculate the CRC for sanity checking
29    * of the data.
30    *
31    */
 
32    final class CRC {
33    static final int crc32Table[] = {
34    0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9,
35    0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
36    0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
37    0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
38    0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
39    0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
40    0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,
41    0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
42    0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
43    0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
44    0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,
45    0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
46    0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49,
47    0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
48    0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
49    0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
50    0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae,
51    0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
52    0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
53    0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
54    0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
55    0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
56    0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066,
57    0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
58    0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,
59    0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
60    0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
61    0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
62    0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,
63    0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
64    0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686,
65    0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
66    0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
67    0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
68    0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,
69    0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
70    0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47,
71    0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
72    0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
73    0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
74    0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7,
75    0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
76    0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f,
77    0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
78    0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
79    0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
80    0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f,
81    0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
82    0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,
83    0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
84    0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
85    0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
86    0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30,
87    0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
88    0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,
89    0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
90    0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
91    0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
92    0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,
93    0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
94    0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0,
95    0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
96    0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
97    0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
98    };
99   
 
100  0 toggle CRC() {
101  0 initialiseCRC();
102    }
103   
 
104  0 toggle void initialiseCRC() {
105  0 globalCrc = 0xffffffff;
106    }
107   
 
108  0 toggle int getFinalCRC() {
109  0 return ~globalCrc;
110    }
111   
 
112  0 toggle int getGlobalCRC() {
113  0 return globalCrc;
114    }
115   
 
116  0 toggle void setGlobalCRC(int newCrc) {
117  0 globalCrc = newCrc;
118    }
119   
 
120  0 toggle void updateCRC(int inCh) {
121  0 int temp = (globalCrc >> 24) ^ inCh;
122  0 if (temp < 0) {
123  0 temp = 256 + temp;
124    }
125  0 globalCrc = (globalCrc << 8) ^ CRC.crc32Table[temp];
126    }
127   
 
128  0 toggle void updateCRC(int inCh, int repeat) {
129  0 int globalCrcShadow = this.globalCrc;
130  0 while (repeat-- > 0) {
131  0 int temp = (globalCrcShadow >> 24) ^ inCh;
132  0 globalCrcShadow = (globalCrcShadow << 8) ^ crc32Table[(temp >= 0)
133    ? temp
134    : (temp + 256)];
135    }
136  0 this.globalCrc = globalCrcShadow;
137    }
138   
139    int globalCrc;
140    }
141