| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef ZLIB |
| 22 | #include "types.h" |
| 23 | #include "crc32.h" |
| 24 | |
| 25 | static uint32 CRC32Table[256] = { |
| 26 | 0x00000000,0x77073096,0xee0e612c,0x990951ba, |
| 27 | 0x076dc419,0x706af48f,0xe963a535,0x9e6495a3, |
| 28 | 0x0edb8832,0x79dcb8a4,0xe0d5e91e,0x97d2d988, |
| 29 | 0x09b64c2b,0x7eb17cbd,0xe7b82d07,0x90bf1d91, |
| 30 | 0x1db71064,0x6ab020f2,0xf3b97148,0x84be41de, |
| 31 | 0x1adad47d,0x6ddde4eb,0xf4d4b551,0x83d385c7, |
| 32 | 0x136c9856,0x646ba8c0,0xfd62f97a,0x8a65c9ec, |
| 33 | 0x14015c4f,0x63066cd9,0xfa0f3d63,0x8d080df5, |
| 34 | 0x3b6e20c8,0x4c69105e,0xd56041e4,0xa2677172, |
| 35 | 0x3c03e4d1,0x4b04d447,0xd20d85fd,0xa50ab56b, |
| 36 | 0x35b5a8fa,0x42b2986c,0xdbbbc9d6,0xacbcf940, |
| 37 | 0x32d86ce3,0x45df5c75,0xdcd60dcf,0xabd13d59, |
| 38 | 0x26d930ac,0x51de003a,0xc8d75180,0xbfd06116, |
| 39 | 0x21b4f4b5,0x56b3c423,0xcfba9599,0xb8bda50f, |
| 40 | 0x2802b89e,0x5f058808,0xc60cd9b2,0xb10be924, |
| 41 | 0x2f6f7c87,0x58684c11,0xc1611dab,0xb6662d3d, |
| 42 | 0x76dc4190,0x01db7106,0x98d220bc,0xefd5102a, |
| 43 | 0x71b18589,0x06b6b51f,0x9fbfe4a5,0xe8b8d433, |
| 44 | 0x7807c9a2,0x0f00f934,0x9609a88e,0xe10e9818, |
| 45 | 0x7f6a0dbb,0x086d3d2d,0x91646c97,0xe6635c01, |
| 46 | 0x6b6b51f4,0x1c6c6162,0x856530d8,0xf262004e, |
| 47 | 0x6c0695ed,0x1b01a57b,0x8208f4c1,0xf50fc457, |
| 48 | 0x65b0d9c6,0x12b7e950,0x8bbeb8ea,0xfcb9887c, |
| 49 | 0x62dd1ddf,0x15da2d49,0x8cd37cf3,0xfbd44c65, |
| 50 | 0x4db26158,0x3ab551ce,0xa3bc0074,0xd4bb30e2, |
| 51 | 0x4adfa541,0x3dd895d7,0xa4d1c46d,0xd3d6f4fb, |
| 52 | 0x4369e96a,0x346ed9fc,0xad678846,0xda60b8d0, |
| 53 | 0x44042d73,0x33031de5,0xaa0a4c5f,0xdd0d7cc9, |
| 54 | 0x5005713c,0x270241aa,0xbe0b1010,0xc90c2086, |
| 55 | 0x5768b525,0x206f85b3,0xb966d409,0xce61e49f, |
| 56 | 0x5edef90e,0x29d9c998,0xb0d09822,0xc7d7a8b4, |
| 57 | 0x59b33d17,0x2eb40d81,0xb7bd5c3b,0xc0ba6cad, |
| 58 | 0xedb88320,0x9abfb3b6,0x03b6e20c,0x74b1d29a, |
| 59 | 0xead54739,0x9dd277af,0x04db2615,0x73dc1683, |
| 60 | 0xe3630b12,0x94643b84,0x0d6d6a3e,0x7a6a5aa8, |
| 61 | 0xe40ecf0b,0x9309ff9d,0x0a00ae27,0x7d079eb1, |
| 62 | 0xf00f9344,0x8708a3d2,0x1e01f268,0x6906c2fe, |
| 63 | 0xf762575d,0x806567cb,0x196c3671,0x6e6b06e7, |
| 64 | 0xfed41b76,0x89d32be0,0x10da7a5a,0x67dd4acc, |
| 65 | 0xf9b9df6f,0x8ebeeff9,0x17b7be43,0x60b08ed5, |
| 66 | 0xd6d6a3e8,0xa1d1937e,0x38d8c2c4,0x4fdff252, |
| 67 | 0xd1bb67f1,0xa6bc5767,0x3fb506dd,0x48b2364b, |
| 68 | 0xd80d2bda,0xaf0a1b4c,0x36034af6,0x41047a60, |
| 69 | 0xdf60efc3,0xa867df55,0x316e8eef,0x4669be79, |
| 70 | 0xcb61b38c,0xbc66831a,0x256fd2a0,0x5268e236, |
| 71 | 0xcc0c7795,0xbb0b4703,0x220216b9,0x5505262f, |
| 72 | 0xc5ba3bbe,0xb2bd0b28,0x2bb45a92,0x5cb36a04, |
| 73 | 0xc2d7ffa7,0xb5d0cf31,0x2cd99e8b,0x5bdeae1d, |
| 74 | 0x9b64c2b0,0xec63f226,0x756aa39c,0x026d930a, |
| 75 | 0x9c0906a9,0xeb0e363f,0x72076785,0x05005713, |
| 76 | 0x95bf4a82,0xe2b87a14,0x7bb12bae,0x0cb61b38, |
| 77 | 0x92d28e9b,0xe5d5be0d,0x7cdcefb7,0x0bdbdf21, |
| 78 | 0x86d3d2d4,0xf1d4e242,0x68ddb3f8,0x1fda836e, |
| 79 | 0x81be16cd,0xf6b9265b,0x6fb077e1,0x18b74777, |
| 80 | 0x88085ae6,0xff0f6a70,0x66063bca,0x11010b5c, |
| 81 | 0x8f659eff,0xf862ae69,0x616bffd3,0x166ccf45, |
| 82 | 0xa00ae278,0xd70dd2ee,0x4e048354,0x3903b3c2, |
| 83 | 0xa7672661,0xd06016f7,0x4969474d,0x3e6e77db, |
| 84 | 0xaed16a4a,0xd9d65adc,0x40df0b66,0x37d83bf0, |
| 85 | 0xa9bcae53,0xdebb9ec5,0x47b2cf7f,0x30b5ffe9, |
| 86 | 0xbdbdf21c,0xcabac28a,0x53b39330,0x24b4a3a6, |
| 87 | 0xbad03605,0xcdd70693,0x54de5729,0x23d967bf, |
| 88 | 0xb3667a2e,0xc4614ab8,0x5d681b02,0x2a6f2b94, |
| 89 | 0xb40bbe37,0xc30c8ea1,0x5a05df1b,0x2d02ef8d |
| 90 | }; |
| 91 | |
| 92 | uint32 CalcCRC32(uint32 crc, uint8 *buf, uint32 len) |
| 93 | { |
| 94 | crc=~crc; |
| 95 | |
| 96 | while(len--) |
| 97 | crc=(crc>>8)^CRC32Table[(crc&0xFF)^(*buf++)]; |
| 98 | return(~crc); |
| 99 | } |
| 100 | #endif |