2 * Copyright (c) 2005-2010 Daniel Braniss <danny@cs.huji.ac.il>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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29 | $Id: isc_subr.c 560 2009-05-07 07:37:49Z danny $
32 #include "dmsg_local.h"
34 /*****************************************************************/
36 /* CRC LOOKUP TABLE */
37 /* ================ */
38 /* The following CRC lookup table was generated automagically */
39 /* by the Rocksoft^tm Model CRC Algorithm Table Generation */
40 /* Program V1.0 using the following model parameters: */
42 /* Width : 4 bytes. */
43 /* Poly : 0x1EDC6F41L */
46 /* For more information on the Rocksoft^tm Model CRC Algorithm, */
47 /* see the document titled "A Painless Guide to CRC Error */
48 /* Detection Algorithms" by Ross Williams */
49 /* (ross@guest.adelaide.edu.au.). This document is likely to be */
50 /* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft". */
52 /*****************************************************************/
54 static const uint32_t dmsg_crc32Table[256] = {
55 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
56 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
57 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
58 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
59 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
60 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
61 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
62 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
63 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
64 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
65 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
66 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
67 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
68 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
69 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
70 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
71 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
72 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
73 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
74 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
75 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
76 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
77 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
78 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
79 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
80 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
81 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
82 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
83 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
84 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
85 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
86 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
87 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
88 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
89 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
90 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
91 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
92 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
93 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
94 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
95 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
96 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
97 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
98 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
99 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
100 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
101 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
102 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
103 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
104 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
105 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
106 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
107 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
108 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
109 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
110 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
111 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
112 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
113 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
114 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
115 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
116 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
117 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
118 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
122 dmsg_icrc32(const void *buf, size_t size)
124 const uint8_t *p = buf;
127 crc = crc ^ 0xffffffff;
129 crc = dmsg_crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
130 crc = crc ^ 0xffffffff;
135 dmsg_icrc32c(const void *buf, size_t size, uint32_t crc)
137 const uint8_t *p = buf;
139 crc = crc ^ 0xffffffff;
141 crc = dmsg_crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
142 crc = crc ^ 0xffffffff;