wsutil/crc32.c

   1 /* crc32.c
   2  * CRC-32 routine
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  *
  24  * Credits:
  25  *
  26  * Table from Solomon Peachy
  27  * Routine from Chris Waters
  28  */
  29
  30 #include "config.h"
  31
  32 #include <glib.h>
  33 #include <wsutil/crc32.h>
  34
  35 /*****************************************************************/
  36 /*                                                               */
  37 /* CRC32C LOOKUP TABLE                                           */
  38 /* +++================                                           */
  39 /* The following CRC lookup table was generated automagically    */
  40 /* by the Rocksoft^tm Model CRC Algorithm Table Generation       */
  41 /* Program V1.0 using the following model parameters:            */
  42 /*                                                               */
  43 /*    Width   : 4 bytes.                                         */
  44 /*    Poly    : 0x1EDC6F41L                                      */
  45 /*    Reverse : TRUE.                                            */
  46 /*                                                               */
  47 /* For more information on the Rocksoft^tm Model CRC Algorithm,  */
  48 /* see the document titled "A Painless Guide to CRC Error        */
  49 /* Detection Algorithms" by Ross Williams                        */
  50 /* (ross@guest.adelaide.edu.au.). This document is likely to be  */
  51 /* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft".        */
  52 /*                                                               */
  53 /*****************************************************************/
  54 #define CRC32C(c,d) (c=(c>>8)^crc32c_table[(c^(d))&0xFF])
  55
  56 static const guint32 crc32c_table[256] = {
  57                 0x00000000U, 0xF26B8303U, 0xE13B70F7U, 0x1350F3F4U, 0xC79A971FU,
  58                 0x35F1141CU, 0x26A1E7E8U, 0xD4CA64EBU, 0x8AD958CFU, 0x78B2DBCCU,
  59                 0x6BE22838U, 0x9989AB3BU, 0x4D43CFD0U, 0xBF284CD3U, 0xAC78BF27U,
  60                 0x5E133C24U, 0x105EC76FU, 0xE235446CU, 0xF165B798U, 0x030E349BU,
  61                 0xD7C45070U, 0x25AFD373U, 0x36FF2087U, 0xC494A384U, 0x9A879FA0U,
  62                 0x68EC1CA3U, 0x7BBCEF57U, 0x89D76C54U, 0x5D1D08BFU, 0xAF768BBCU,
  63                 0xBC267848U, 0x4E4DFB4BU, 0x20BD8EDEU, 0xD2D60DDDU, 0xC186FE29U,
  64                 0x33ED7D2AU, 0xE72719C1U, 0x154C9AC2U, 0x061C6936U, 0xF477EA35U,
  65                 0xAA64D611U, 0x580F5512U, 0x4B5FA6E6U, 0xB93425E5U, 0x6DFE410EU,
  66                 0x9F95C20DU, 0x8CC531F9U, 0x7EAEB2FAU, 0x30E349B1U, 0xC288CAB2U,
  67                 0xD1D83946U, 0x23B3BA45U, 0xF779DEAEU, 0x05125DADU, 0x1642AE59U,
  68                 0xE4292D5AU, 0xBA3A117EU, 0x4851927DU, 0x5B016189U, 0xA96AE28AU,
  69                 0x7DA08661U, 0x8FCB0562U, 0x9C9BF696U, 0x6EF07595U, 0x417B1DBCU,
  70                 0xB3109EBFU, 0xA0406D4BU, 0x522BEE48U, 0x86E18AA3U, 0x748A09A0U,
  71                 0x67DAFA54U, 0x95B17957U, 0xCBA24573U, 0x39C9C670U, 0x2A993584U,
  72                 0xD8F2B687U, 0x0C38D26CU, 0xFE53516FU, 0xED03A29BU, 0x1F682198U,
  73                 0x5125DAD3U, 0xA34E59D0U, 0xB01EAA24U, 0x42752927U, 0x96BF4DCCU,
  74                 0x64D4CECFU, 0x77843D3BU, 0x85EFBE38U, 0xDBFC821CU, 0x2997011FU,
  75                 0x3AC7F2EBU, 0xC8AC71E8U, 0x1C661503U, 0xEE0D9600U, 0xFD5D65F4U,
  76                 0x0F36E6F7U, 0x61C69362U, 0x93AD1061U, 0x80FDE395U, 0x72966096U,
  77                 0xA65C047DU, 0x5437877EU, 0x4767748AU, 0xB50CF789U, 0xEB1FCBADU,
  78                 0x197448AEU, 0x0A24BB5AU, 0xF84F3859U, 0x2C855CB2U, 0xDEEEDFB1U,
  79                 0xCDBE2C45U, 0x3FD5AF46U, 0x7198540DU, 0x83F3D70EU, 0x90A324FAU,
  80                 0x62C8A7F9U, 0xB602C312U, 0x44694011U, 0x5739B3E5U, 0xA55230E6U,
  81                 0xFB410CC2U, 0x092A8FC1U, 0x1A7A7C35U, 0xE811FF36U, 0x3CDB9BDDU,
  82                 0xCEB018DEU, 0xDDE0EB2AU, 0x2F8B6829U, 0x82F63B78U, 0x709DB87BU,
  83                 0x63CD4B8FU, 0x91A6C88CU, 0x456CAC67U, 0xB7072F64U, 0xA457DC90U,
  84                 0x563C5F93U, 0x082F63B7U, 0xFA44E0B4U, 0xE9141340U, 0x1B7F9043U,
  85                 0xCFB5F4A8U, 0x3DDE77ABU, 0x2E8E845FU, 0xDCE5075CU, 0x92A8FC17U,
  86                 0x60C37F14U, 0x73938CE0U, 0x81F80FE3U, 0x55326B08U, 0xA759E80BU,
  87                 0xB4091BFFU, 0x466298FCU, 0x1871A4D8U, 0xEA1A27DBU, 0xF94AD42FU,
  88                 0x0B21572CU, 0xDFEB33C7U, 0x2D80B0C4U, 0x3ED04330U, 0xCCBBC033U,
  89                 0xA24BB5A6U, 0x502036A5U, 0x4370C551U, 0xB11B4652U, 0x65D122B9U,
  90                 0x97BAA1BAU, 0x84EA524EU, 0x7681D14DU, 0x2892ED69U, 0xDAF96E6AU,
  91                 0xC9A99D9EU, 0x3BC21E9DU, 0xEF087A76U, 0x1D63F975U, 0x0E330A81U,
  92                 0xFC588982U, 0xB21572C9U, 0x407EF1CAU, 0x532E023EU, 0xA145813DU,
  93                 0x758FE5D6U, 0x87E466D5U, 0x94B49521U, 0x66DF1622U, 0x38CC2A06U,
  94                 0xCAA7A905U, 0xD9F75AF1U, 0x2B9CD9F2U, 0xFF56BD19U, 0x0D3D3E1AU,
  95                 0x1E6DCDEEU, 0xEC064EEDU, 0xC38D26C4U, 0x31E6A5C7U, 0x22B65633U,
  96                 0xD0DDD530U, 0x0417B1DBU, 0xF67C32D8U, 0xE52CC12CU, 0x1747422FU,
  97                 0x49547E0BU, 0xBB3FFD08U, 0xA86F0EFCU, 0x5A048DFFU, 0x8ECEE914U,
  98                 0x7CA56A17U, 0x6FF599E3U, 0x9D9E1AE0U, 0xD3D3E1ABU, 0x21B862A8U,
  99                 0x32E8915CU, 0xC083125FU, 0x144976B4U, 0xE622F5B7U, 0xF5720643U,
 100                 0x07198540U, 0x590AB964U, 0xAB613A67U, 0xB831C993U, 0x4A5A4A90U,
 101                 0x9E902E7BU, 0x6CFBAD78U, 0x7FAB5E8CU, 0x8DC0DD8FU, 0xE330A81AU,
 102                 0x115B2B19U, 0x020BD8EDU, 0xF0605BEEU, 0x24AA3F05U, 0xD6C1BC06U,
 103                 0xC5914FF2U, 0x37FACCF1U, 0x69E9F0D5U, 0x9B8273D6U, 0x88D28022U,
 104                 0x7AB90321U, 0xAE7367CAU, 0x5C18E4C9U, 0x4F48173DU, 0xBD23943EU,
 105                 0xF36E6F75U, 0x0105EC76U, 0x12551F82U, 0xE03E9C81U, 0x34F4F86AU,
 106                 0xC69F7B69U, 0xD5CF889DU, 0x27A40B9EU, 0x79B737BAU, 0x8BDCB4B9U,
 107                 0x988C474DU, 0x6AE7C44EU, 0xBE2DA0A5U, 0x4C4623A6U, 0x5F16D052U,
 108                 0xAD7D5351U };
 109
 110 /*
 111  * Table for the AUTODIN/HDLC/802.x CRC.
 112  *
 113  * Polynomial is
 114  *
 115  *  x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^8 + x^7 +
 116  *      x^5 + x^4 + x^2 + x + 1
 117  */
 118 static const guint32 crc32_ccitt_table[256] = {
 119         0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
 120         0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
 121         0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
 122         0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
 123         0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
 124         0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
 125         0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
 126         0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
 127         0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
 128         0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
 129         0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
 130         0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
 131         0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
 132         0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
 133         0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
 134         0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
 135         0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
 136         0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
 137         0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
 138         0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
 139         0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
 140         0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
 141         0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
 142         0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
 143         0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
 144         0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
 145         0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
 146         0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
 147         0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
 148         0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
 149         0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
 150         0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
 151         0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
 152         0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
 153         0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
 154         0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
 155         0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
 156         0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
 157         0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
 158         0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
 159         0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
 160         0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
 161         0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
 162         0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
 163         0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
 164         0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
 165         0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
 166         0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
 167         0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
 168         0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
 169         0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
 170         0x2d02ef8d
 171 };
 172
 173 /*
 174  * Table for the MPEG-2 CRC.
 175  *
 176  * Polynomial is
 177  *
 178  *  x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 +
 179  *      x^7 + x^5 + x^4 + x^2 + x + 1
 180  */
 181 static const guint32 crc32_mpeg2_table[256] = {
 182                 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
 183                 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
 184                 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
 185                 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
 186                 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
 187                 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
 188                 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
 189                 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
 190                 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
 191                 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
 192                 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
 193                 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
 194                 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
 195                 0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
 196                 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
 197                 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
 198                 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
 199                 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
 200                 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
 201                 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
 202                 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
 203                 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
 204                 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
 205                 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
 206                 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
 207                 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
 208                 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
 209                 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
 210                 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
 211                 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
 212                 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
 213                 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
 214                 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
 215                 0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
 216                 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
 217                 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
 218                 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
 219                 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
 220                 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
 221                 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
 222                 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
 223                 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
 224                 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
 225 };
 226
 227 /* This table was compiled using the polynom: 0x0AA725CF*/
 228 static const guint32 crc32_0AA725CF_reverse[] = {
 229                 0x00000000U, 0xCEAA95CEU, 0x7A1CE13DU, 0xB4B674F3U,
 230                 0xF439C27AU, 0x3A9357B4U, 0x8E252347U, 0x408FB689U,
 231                 0x0F3A4E55U, 0xC190DB9BU, 0x7526AF68U, 0xBB8C3AA6U,
 232                 0xFB038C2FU, 0x35A919E1U, 0x811F6D12U, 0x4FB5F8DCU,
 233                 0x1E749CAAU, 0xD0DE0964U, 0x64687D97U, 0xAAC2E859U,
 234                 0xEA4D5ED0U, 0x24E7CB1EU, 0x9051BFEDU, 0x5EFB2A23U,
 235                 0x114ED2FFU, 0xDFE44731U, 0x6B5233C2U, 0xA5F8A60CU,
 236                 0xE5771085U, 0x2BDD854BU, 0x9F6BF1B8U, 0x51C16476U,
 237                 0x3CE93954U, 0xF243AC9AU, 0x46F5D869U, 0x885F4DA7U,
 238                 0xC8D0FB2EU, 0x067A6EE0U, 0xB2CC1A13U, 0x7C668FDDU,
 239                 0x33D37701U, 0xFD79E2CFU, 0x49CF963CU, 0x876503F2U,
 240                 0xC7EAB57BU, 0x094020B5U, 0xBDF65446U, 0x735CC188U,
 241                 0x229DA5FEU, 0xEC373030U, 0x588144C3U, 0x962BD10DU,
 242                 0xD6A46784U, 0x180EF24AU, 0xACB886B9U, 0x62121377U,
 243                 0x2DA7EBABU, 0xE30D7E65U, 0x57BB0A96U, 0x99119F58U,
 244                 0xD99E29D1U, 0x1734BC1FU, 0xA382C8ECU, 0x6D285D22U,
 245                 0x79D272A8U, 0xB778E766U, 0x03CE9395U, 0xCD64065BU,
 246                 0x8DEBB0D2U, 0x4341251CU, 0xF7F751EFU, 0x395DC421U,
 247                 0x76E83CFDU, 0xB842A933U, 0x0CF4DDC0U, 0xC25E480EU,
 248                 0x82D1FE87U, 0x4C7B6B49U, 0xF8CD1FBAU, 0x36678A74U,
 249                 0x67A6EE02U, 0xA90C7BCCU, 0x1DBA0F3FU, 0xD3109AF1U,
 250                 0x939F2C78U, 0x5D35B9B6U, 0xE983CD45U, 0x2729588BU,
 251                 0x689CA057U, 0xA6363599U, 0x1280416AU, 0xDC2AD4A4U,
 252                 0x9CA5622DU, 0x520FF7E3U, 0xE6B98310U, 0x281316DEU,
 253                 0x453B4BFCU, 0x8B91DE32U, 0x3F27AAC1U, 0xF18D3F0FU,
 254                 0xB1028986U, 0x7FA81C48U, 0xCB1E68BBU, 0x05B4FD75U,
 255                 0x4A0105A9U, 0x84AB9067U, 0x301DE494U, 0xFEB7715AU,
 256                 0xBE38C7D3U, 0x7092521DU, 0xC42426EEU, 0x0A8EB320U,
 257                 0x5B4FD756U, 0x95E54298U, 0x2153366BU, 0xEFF9A3A5U,
 258                 0xAF76152CU, 0x61DC80E2U, 0xD56AF411U, 0x1BC061DFU,
 259                 0x54759903U, 0x9ADF0CCDU, 0x2E69783EU, 0xE0C3EDF0U,
 260                 0xA04C5B79U, 0x6EE6CEB7U, 0xDA50BA44U, 0x14FA2F8AU,
 261                 0xF3A4E550U, 0x3D0E709EU, 0x89B8046DU, 0x471291A3U,
 262                 0x079D272AU, 0xC937B2E4U, 0x7D81C617U, 0xB32B53D9U,
 263                 0xFC9EAB05U, 0x32343ECBU, 0x86824A38U, 0x4828DFF6U,
 264                 0x08A7697FU, 0xC60DFCB1U, 0x72BB8842U, 0xBC111D8CU,
 265                 0xEDD079FAU, 0x237AEC34U, 0x97CC98C7U, 0x59660D09U,
 266                 0x19E9BB80U, 0xD7432E4EU, 0x63F55ABDU, 0xAD5FCF73U,
 267                 0xE2EA37AFU, 0x2C40A261U, 0x98F6D692U, 0x565C435CU,
 268                 0x16D3F5D5U, 0xD879601BU, 0x6CCF14E8U, 0xA2658126U,
 269                 0xCF4DDC04U, 0x01E749CAU, 0xB5513D39U, 0x7BFBA8F7U,
 270                 0x3B741E7EU, 0xF5DE8BB0U, 0x4168FF43U, 0x8FC26A8DU,
 271                 0xC0779251U, 0x0EDD079FU, 0xBA6B736CU, 0x74C1E6A2U,
 272                 0x344E502BU, 0xFAE4C5E5U, 0x4E52B116U, 0x80F824D8U,
 273                 0xD13940AEU, 0x1F93D560U, 0xAB25A193U, 0x658F345DU,
 274                 0x250082D4U, 0xEBAA171AU, 0x5F1C63E9U, 0x91B6F627U,
 275                 0xDE030EFBU, 0x10A99B35U, 0xA41FEFC6U, 0x6AB57A08U,
 276                 0x2A3ACC81U, 0xE490594FU, 0x50262DBCU, 0x9E8CB872U,
 277                 0x8A7697F8U, 0x44DC0236U, 0xF06A76C5U, 0x3EC0E30BU,
 278                 0x7E4F5582U, 0xB0E5C04CU, 0x0453B4BFU, 0xCAF92171U,
 279                 0x854CD9ADU, 0x4BE64C63U, 0xFF503890U, 0x31FAAD5EU,
 280                 0x71751BD7U, 0xBFDF8E19U, 0x0B69FAEAU, 0xC5C36F24U,
 281                 0x94020B52U, 0x5AA89E9CU, 0xEE1EEA6FU, 0x20B47FA1U,
 282                 0x603BC928U, 0xAE915CE6U, 0x1A272815U, 0xD48DBDDBU,
 283                 0x9B384507U, 0x5592D0C9U, 0xE124A43AU, 0x2F8E31F4U,
 284                 0x6F01877DU, 0xA1AB12B3U, 0x151D6640U, 0xDBB7F38EU,
 285                 0xB69FAEACU, 0x78353B62U, 0xCC834F91U, 0x0229DA5FU,
 286                 0x42A66CD6U, 0x8C0CF918U, 0x38BA8DEBU, 0xF6101825U,
 287                 0xB9A5E0F9U, 0x770F7537U, 0xC3B901C4U, 0x0D13940AU,
 288                 0x4D9C2283U, 0x8336B74DU, 0x3780C3BEU, 0xF92A5670U,
 289                 0xA8EB3206U, 0x6641A7C8U, 0xD2F7D33BU, 0x1C5D46F5U,
 290                 0x5CD2F07CU, 0x927865B2U, 0x26CE1141U, 0xE864848FU,
 291                 0xA7D17C53U, 0x697BE99DU, 0xDDCD9D6EU, 0x136708A0U,
 292                 0x53E8BE29U, 0x9D422BE7U, 0x29F45F14U, 0xE75ECADAU
 293 };
 294
 295 guint32
 296 crc32c_table_lookup (guchar pos)
 297 {
 298         return crc32c_table[pos];
 299 }
 300
 301 guint32
 302 crc32_ccitt_table_lookup (guchar pos)
 303 {
 304         return crc32_ccitt_table[pos];
 305 }
 306
 307 guint32
 308 crc32c_calculate(const void *buf, int len, guint32 crc)
 309 {
 310         const guint8 *p = (const guint8 *)buf;
 311         crc = CRC32C_SWAP(crc);
 312         while (len-- > 0) {
 313                 CRC32C(crc, *p++);
 314         }
 315         return CRC32C_SWAP(crc);
 316 }
 317
 318 guint32
 319 crc32c_calculate_no_swap(const void *buf, int len, guint32 crc)
 320 {
 321         const guint8 *p = (const guint8 *)buf;
 322         while (len-- > 0) {
 323                 CRC32C(crc, *p++);
 324         }
 325
 326         return crc;
 327 }
 328
 329 guint32
 330 crc32_ccitt(const guint8 *buf, guint len)
 331 {
 332         return (crc32_ccitt_seed(buf, len, CRC32_CCITT_SEED));
 333 }
 334
 335 guint32
 336 crc32_ccitt_seed(const guint8 *buf, guint len, guint32 seed)
 337 {
 338         guint i;
 339         guint32 crc32 = seed;
 340
 341         for (i = 0; i < len; i++)
 342                 crc32 = crc32_ccitt_table[(crc32 ^ buf[i]) & 0xff] ^ (crc32 >> 8);
 343
 344         return ( ~crc32 );
 345 }
 346
 347 guint32
 348 crc32_mpeg2_seed(const guint8 *buf, guint len, guint32 seed)
 349 {
 350         guint i;
 351         guint32 crc32;
 352
 353         crc32 = seed;
 354
 355         for (i = 0; i < len; i++)
 356                 crc32 = (crc32 << 8) ^ crc32_mpeg2_table[((crc32 >> 24) ^ buf[i]) & 0xff];
 357
 358         return ( crc32 );
 359 }
 360
 361 guint32
 362 crc32_0x0AA725CF_seed(const guint8 *buf, guint len, guint32 seed)
 363 {
 364         guint crc32;
 365
 366         crc32 = (guint)seed;
 367                 while( len-- != 0 )
 368                         crc32 = crc32_0AA725CF_reverse[(crc32 ^ *buf++) & 0xff] ^ (crc32 >> 8);
 369
 370         return (guint32)crc32;
 371 }
 372
 373 /*
 374  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 375  *
 376  * Local variables:
 377  * c-basic-offset: 8
 378  * tab-width: 8
 379  * indent-tabs-mode: t
 380  * End:
 381  *
 382  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 383  * :indentSize=8:tabSize=8:noTabs=false:
 384  */