Cross Platform Development SDK Game

00001 /* ******************************************************************** *
00002  *
00003  *  crc_32() -- build a crc 32 for each outputed character
00004  *  Copyright (c) 1994, Bob Flanders and Michael Holmes
00005  *
00006  * ******************************************************************** */
00007 
00008 void    crc_32(unsigned char c,             // character to output
00009                unsigned long *crc)          // crc 32 field
00010 {
00011 static unsigned long crc_32_table[256] =
00012     {
00013     0x000000000L, 0x077073096L, 0x0EE0E612CL, 0x0990951BAL, 0x0076DC419L, 0x0706AF48FL, 0x0E963A535L, 0x09E6495A3L,
00014     0x00EDB8832L, 0x079DCB8A4L, 0x0E0D5E91EL, 0x097D2D988L, 0x009B64C2BL, 0x07EB17CBDL, 0x0E7B82D07L, 0x090BF1D91L,
00015     0x01DB71064L, 0x06AB020F2L, 0x0F3B97148L, 0x084BE41DEL, 0x01ADAD47DL, 0x06DDDE4EBL, 0x0F4D4B551L, 0x083D385C7L,
00016     0x0136C9856L, 0x0646BA8C0L, 0x0FD62F97AL, 0x08A65C9ECL, 0x014015C4FL, 0x063066CD9L, 0x0FA0F3D63L, 0x08D080DF5L,
00017     0x03B6E20C8L, 0x04C69105EL, 0x0D56041E4L, 0x0A2677172L, 0x03C03E4D1L, 0x04B04D447L, 0x0D20D85FDL, 0x0A50AB56BL,
00018     0x035B5A8FAL, 0x042B2986CL, 0x0DBBBC9D6L, 0x0ACBCF940L, 0x032D86CE3L, 0x045DF5C75L, 0x0DCD60DCFL, 0x0ABD13D59L,
00019     0x026D930ACL, 0x051DE003AL, 0x0C8D75180L, 0x0BFD06116L, 0x021B4F4B5L, 0x056B3C423L, 0x0CFBA9599L, 0x0B8BDA50FL,
00020     0x02802B89EL, 0x05F058808L, 0x0C60CD9B2L, 0x0B10BE924L, 0x02F6F7C87L, 0x058684C11L, 0x0C1611DABL, 0x0B6662D3DL,
00021     0x076DC4190L, 0x001DB7106L, 0x098D220BCL, 0x0EFD5102AL, 0x071B18589L, 0x006B6B51FL, 0x09FBFE4A5L, 0x0E8B8D433L,
00022     0x07807C9A2L, 0x00F00F934L, 0x09609A88EL, 0x0E10E9818L, 0x07F6A0DBBL, 0x0086D3D2DL, 0x091646C97L, 0x0E6635C01L,
00023     0x06B6B51F4L, 0x01C6C6162L, 0x0856530D8L, 0x0F262004EL, 0x06C0695EDL, 0x01B01A57BL, 0x08208F4C1L, 0x0F50FC457L,
00024     0x065B0D9C6L, 0x012B7E950L, 0x08BBEB8EAL, 0x0FCB9887CL, 0x062DD1DDFL, 0x015DA2D49L, 0x08CD37CF3L, 0x0FBD44C65L,
00025     0x04DB26158L, 0x03AB551CEL, 0x0A3BC0074L, 0x0D4BB30E2L, 0x04ADFA541L, 0x03DD895D7L, 0x0A4D1C46DL, 0x0D3D6F4FBL,
00026     0x04369E96AL, 0x0346ED9FCL, 0x0AD678846L, 0x0DA60B8D0L, 0x044042D73L, 0x033031DE5L, 0x0AA0A4C5FL, 0x0DD0D7CC9L,
00027     0x05005713CL, 0x0270241AAL, 0x0BE0B1010L, 0x0C90C2086L, 0x05768B525L, 0x0206F85B3L, 0x0B966D409L, 0x0CE61E49FL,
00028     0x05EDEF90EL, 0x029D9C998L, 0x0B0D09822L, 0x0C7D7A8B4L, 0x059B33D17L, 0x02EB40D81L, 0x0B7BD5C3BL, 0x0C0BA6CADL,
00029     0x0EDB88320L, 0x09ABFB3B6L, 0x003B6E20CL, 0x074B1D29AL, 0x0EAD54739L, 0x09DD277AFL, 0x004DB2615L, 0x073DC1683L,
00030     0x0E3630B12L, 0x094643B84L, 0x00D6D6A3EL, 0x07A6A5AA8L, 0x0E40ECF0BL, 0x09309FF9DL, 0x00A00AE27L, 0x07D079EB1L,
00031     0x0F00F9344L, 0x08708A3D2L, 0x01E01F268L, 0x06906C2FEL, 0x0F762575DL, 0x0806567CBL, 0x0196C3671L, 0x06E6B06E7L,
00032     0x0FED41B76L, 0x089D32BE0L, 0x010DA7A5AL, 0x067DD4ACCL, 0x0F9B9DF6FL, 0x08EBEEFF9L, 0x017B7BE43L, 0x060B08ED5L,
00033     0x0D6D6A3E8L, 0x0A1D1937EL, 0x038D8C2C4L, 0x04FDFF252L, 0x0D1BB67F1L, 0x0A6BC5767L, 0x03FB506DDL, 0x048B2364BL,
00034     0x0D80D2BDAL, 0x0AF0A1B4CL, 0x036034AF6L, 0x041047A60L, 0x0DF60EFC3L, 0x0A867DF55L, 0x0316E8EEFL, 0x04669BE79L,
00035     0x0CB61B38CL, 0x0BC66831AL, 0x0256FD2A0L, 0x05268E236L, 0x0CC0C7795L, 0x0BB0B4703L, 0x0220216B9L, 0x05505262FL,
00036     0x0C5BA3BBEL, 0x0B2BD0B28L, 0x02BB45A92L, 0x05CB36A04L, 0x0C2D7FFA7L, 0x0B5D0CF31L, 0x02CD99E8BL, 0x05BDEAE1DL,
00037     0x09B64C2B0L, 0x0EC63F226L, 0x0756AA39CL, 0x0026D930AL, 0x09C0906A9L, 0x0EB0E363FL, 0x072076785L, 0x005005713L,
00038     0x095BF4A82L, 0x0E2B87A14L, 0x07BB12BAEL, 0x00CB61B38L, 0x092D28E9BL, 0x0E5D5BE0DL, 0x07CDCEFB7L, 0x00BDBDF21L,
00039     0x086D3D2D4L, 0x0F1D4E242L, 0x068DDB3F8L, 0x01FDA836EL, 0x081BE16CDL, 0x0F6B9265BL, 0x06FB077E1L, 0x018B74777L,
00040     0x088085AE6L, 0x0FF0F6A70L, 0x066063BCAL, 0x011010B5CL, 0x08F659EFFL, 0x0F862AE69L, 0x0616BFFD3L, 0x0166CCF45L,
00041     0x0A00AE278L, 0x0D70DD2EEL, 0x04E048354L, 0x03903B3C2L, 0x0A7672661L, 0x0D06016F7L, 0x04969474DL, 0x03E6E77DBL,
00042     0x0AED16A4AL, 0x0D9D65ADCL, 0x040DF0B66L, 0x037D83BF0L, 0x0A9BCAE53L, 0x0DEBB9EC5L, 0x047B2CF7FL, 0x030B5FFE9L,
00043     0x0BDBDF21CL, 0x0CABAC28AL, 0x053B39330L, 0x024B4A3A6L, 0x0BAD03605L, 0x0CDD70693L, 0x054DE5729L, 0x023D967BFL,
00044     0x0B3667A2EL, 0x0C4614AB8L, 0x05D681B02L, 0x02A6F2B94L, 0x0B40BBE37L, 0x0C30C8EA1L, 0x05A05DF1BL, 0x02D02EF8DL
00045     };
00046 
00047         c ^= *(unsigned char *) crc;                // apply current crc to current character
00048         *crc >>= 8;                                 // shift old value down
00049         *crc ^= crc_32_table[c];                    // xor in new value
00050 }
00051 
00052 
00053
unzip_Crc32.h
