efirt.9: Add missing header to the SYNOPSIS.
[dragonfly.git] / sbin / hammer2 / icrc.c
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1/*-
2 * Copyright (c) 2005-2010 Daniel Braniss <danny@cs.huji.ac.il>
3 * 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 *
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
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27/*
28 | iSCSI
29 | $Id: isc_subr.c 560 2009-05-07 07:37:49Z danny $
30 */
31
32#include <sys/types.h>
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34#include "hammer2.h"
35
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36/*****************************************************************/
37/* */
38/* CRC LOOKUP TABLE */
39/* ================ */
40/* The following CRC lookup table was generated automagically */
41/* by the Rocksoft^tm Model CRC Algorithm Table Generation */
42/* Program V1.0 using the following model parameters: */
43/* */
44/* Width : 4 bytes. */
45/* Poly : 0x1EDC6F41L */
46/* Reverse : TRUE. */
47/* */
48/* For more information on the Rocksoft^tm Model CRC Algorithm, */
49/* see the document titled "A Painless Guide to CRC Error */
50/* Detection Algorithms" by Ross Williams */
51/* (ross@guest.adelaide.edu.au.). This document is likely to be */
52/* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft". */
53/* */
54/*****************************************************************/
55
02454b3e 56static const uint32_t crc32Table[256] = {
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57 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
58 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
59 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
60 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
61 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
62 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
63 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
64 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
65 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
66 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
67 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
68 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
69 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
70 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
71 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
72 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
73 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
74 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
75 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
76 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
77 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
78 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
79 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
80 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
81 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
82 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
83 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
84 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
85 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
86 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
87 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
88 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
89 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
90 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
91 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
92 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
93 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
94 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
95 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
96 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
97 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
98 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
99 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
100 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
101 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
102 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
103 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
104 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
105 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
106 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
107 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
108 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
109 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
110 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
111 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
112 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
113 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
114 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
115 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
116 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
117 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
118 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
119 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
120 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
121};
122
123uint32_t
124hammer2_icrc32(const void *buf, size_t size)
125{
126 const uint8_t *p = buf;
127 uint32_t crc = 0;
128
129 crc = crc ^ 0xffffffff;
130 while (size--)
131 crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
132 crc = crc ^ 0xffffffff;
133 return crc;
134}
135
136uint32_t
137hammer2_icrc32c(const void *buf, size_t size, uint32_t crc)
138{
139 const uint8_t *p = buf;
140
141 crc = crc ^ 0xffffffff;
142 while (size--)
143 crc = crc32Table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
144 crc = crc ^ 0xffffffff;
145 return crc;
146}