165 lines
6.2 KiB
C
165 lines
6.2 KiB
C
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/****************************************************************************\
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CRC32.C / OPK Wizard (OPKWIZ.EXE)
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Microsoft Confidential
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Copyright (c) Microsoft Corporation 1999
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All rights reserved
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CRC API source file for CRC APIs used in the OPK Wizard.
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??/?? - Mike Sliger (MSLIGER)
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Original Author.
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08/93 - BENS
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Initional version.
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04/96 - PRITOBLA
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Changed to a 32-bit program.
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05/99 - Jason Cohen (JCOHEN)
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Updated this old source file for the OPK Wizard as part of the
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Millennium rewrite. Simply cleaned it up a little.
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09/2000 - Stephen Lodwick (STELO)
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Ported OPK Wizard to Whistler
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\****************************************************************************/
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//
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// Internal Include File(s):
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//
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#include "pch.h"
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//
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// Internal Defined Value(s):
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//
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#define CRC32_INITIAL_VALUE 0L // Must use this as initial value for CRC
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//
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// Internal Constant(s):
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//
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static long crc_32_tab[] =
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{
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0x00000000L, 0x77073096L, 0xEE0E612CL, 0x990951BAL, 0x076DC419L, 0x706AF48FL, 0xE963A535L, 0x9E6495A3L,
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0x0EDB8832L, 0x79DCB8A4L, 0xE0D5E91EL, 0x97D2D988L, 0x09B64C2BL, 0x7EB17CBDL, 0xE7B82D07L, 0x90BF1D91L,
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0x1DB71064L, 0x6AB020F2L, 0xF3B97148L, 0x84BE41DEL, 0x1ADAD47DL, 0x6DDDE4EBL, 0xF4D4B551L, 0x83D385C7L,
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0x136C9856L, 0x646BA8C0L, 0xFD62F97AL, 0x8A65C9ECL, 0x14015C4FL, 0x63066CD9L, 0xFA0F3D63L, 0x8D080DF5L,
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0x3B6E20C8L, 0x4C69105EL, 0xD56041E4L, 0xA2677172L, 0x3C03E4D1L, 0x4B04D447L, 0xD20D85FDL, 0xA50AB56BL,
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0x35B5A8FAL, 0x42B2986CL, 0xDBBBC9D6L, 0xACBCF940L, 0x32D86CE3L, 0x45DF5C75L, 0xDCD60DCFL, 0xABD13D59L,
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0x26D930ACL, 0x51DE003AL, 0xC8D75180L, 0xBFD06116L, 0x21B4F4B5L, 0x56B3C423L, 0xCFBA9599L, 0xB8BDA50FL,
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0x2802B89EL, 0x5F058808L, 0xC60CD9B2L, 0xB10BE924L, 0x2F6F7C87L, 0x58684C11L, 0xC1611DABL, 0xB6662D3DL,
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0x76DC4190L, 0x01DB7106L, 0x98D220BCL, 0xEFD5102AL, 0x71B18589L, 0x06B6B51FL, 0x9FBFE4A5L, 0xE8B8D433L,
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0x7807C9A2L, 0x0F00F934L, 0x9609A88EL, 0xE10E9818L, 0x7F6A0DBBL, 0x086D3D2DL, 0x91646C97L, 0xE6635C01L,
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0x6B6B51F4L, 0x1C6C6162L, 0x856530D8L, 0xF262004EL, 0x6C0695EDL, 0x1B01A57BL, 0x8208F4C1L, 0xF50FC457L,
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0x65B0D9C6L, 0x12B7E950L, 0x8BBEB8EAL, 0xFCB9887CL, 0x62DD1DDFL, 0x15DA2D49L, 0x8CD37CF3L, 0xFBD44C65L,
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0x4DB26158L, 0x3AB551CEL, 0xA3BC0074L, 0xD4BB30E2L, 0x4ADFA541L, 0x3DD895D7L, 0xA4D1C46DL, 0xD3D6F4FBL,
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0x4369E96AL, 0x346ED9FCL, 0xAD678846L, 0xDA60B8D0L, 0x44042D73L, 0x33031DE5L, 0xAA0A4C5FL, 0xDD0D7CC9L,
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0x5005713CL, 0x270241AAL, 0xBE0B1010L, 0xC90C2086L, 0x5768B525L, 0x206F85B3L, 0xB966D409L, 0xCE61E49FL,
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0x5EDEF90EL, 0x29D9C998L, 0xB0D09822L, 0xC7D7A8B4L, 0x59B33D17L, 0x2EB40D81L, 0xB7BD5C3BL, 0xC0BA6CADL,
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0xEDB88320L, 0x9ABFB3B6L, 0x03B6E20CL, 0x74B1D29AL, 0xEAD54739L, 0x9DD277AFL, 0x04DB2615L, 0x73DC1683L,
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0xE3630B12L, 0x94643B84L, 0x0D6D6A3EL, 0x7A6A5AA8L, 0xE40ECF0BL, 0x9309FF9DL, 0x0A00AE27L, 0x7D079EB1L,
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0xF00F9344L, 0x8708A3D2L, 0x1E01F268L, 0x6906C2FEL, 0xF762575DL, 0x806567CBL, 0x196C3671L, 0x6E6B06E7L,
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0xFED41B76L, 0x89D32BE0L, 0x10DA7A5AL, 0x67DD4ACCL, 0xF9B9DF6FL, 0x8EBEEFF9L, 0x17B7BE43L, 0x60B08ED5L,
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0xD6D6A3E8L, 0xA1D1937EL, 0x38D8C2C4L, 0x4FDFF252L, 0xD1BB67F1L, 0xA6BC5767L, 0x3FB506DDL, 0x48B2364BL,
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0xD80D2BDAL, 0xAF0A1B4CL, 0x36034AF6L, 0x41047A60L, 0xDF60EFC3L, 0xA867DF55L, 0x316E8EEFL, 0x4669BE79L,
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0xCB61B38CL, 0xBC66831AL, 0x256FD2A0L, 0x5268E236L, 0xCC0C7795L, 0xBB0B4703L, 0x220216B9L, 0x5505262FL,
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0xC5BA3BBEL, 0xB2BD0B28L, 0x2BB45A92L, 0x5CB36A04L, 0xC2D7FFA7L, 0xB5D0CF31L, 0x2CD99E8BL, 0x5BDEAE1DL,
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0x9B64C2B0L, 0xEC63F226L, 0x756AA39CL, 0x026D930AL, 0x9C0906A9L, 0xEB0E363FL, 0x72076785L, 0x05005713L,
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0x95BF4A82L, 0xE2B87A14L, 0x7BB12BAEL, 0x0CB61B38L, 0x92D28E9BL, 0xE5D5BE0DL, 0x7CDCEFB7L, 0x0BDBDF21L,
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0x86D3D2D4L, 0xF1D4E242L, 0x68DDB3F8L, 0x1FDA836EL, 0x81BE16CDL, 0xF6B9265BL, 0x6FB077E1L, 0x18B74777L,
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0x88085AE6L, 0xFF0F6A70L, 0x66063BCAL, 0x11010B5CL, 0x8F659EFFL, 0xF862AE69L, 0x616BFFD3L, 0x166CCF45L,
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0xA00AE278L, 0xD70DD2EEL, 0x4E048354L, 0x3903B3C2L, 0xA7672661L, 0xD06016F7L, 0x4969474DL, 0x3E6E77DBL,
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0xAED16A4AL, 0xD9D65ADCL, 0x40DF0B66L, 0x37D83BF0L, 0xA9BCAE53L, 0xDEBB9EC5L, 0x47B2CF7FL, 0x30B5FFE9L,
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0xBDBDF21CL, 0xCABAC28AL, 0x53B39330L, 0x24B4A3A6L, 0xBAD03605L, 0xCDD70693L, 0x54DE5729L, 0x23D967BFL,
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0xB3667A2EL, 0xC4614AB8L, 0x5D681B02L, 0x2A6F2B94L, 0xB40BBE37L, 0xC30C8EA1L, 0x5A05DF1BL, 0x2D02EF8DL
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};
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//
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// Internal Function Prototype(s):
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//
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static ULONG Crc32Compute(PBYTE, DWORD, ULONG);
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//
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// External Function(s):
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//
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/****************************************************************************\
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CrcFile() - Does a CRC on a filename
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\****************************************************************************/
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ULONG CrcFile(LPCTSTR lpszFQFile)
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{
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HANDLE hFile;
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LPTSTR lpszBuf;
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DWORD dwSize = 0x8000,
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dwRead = 0;
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ULONG ulRes = CRC32_INITIAL_VALUE;
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while ( ( dwSize > 32 ) && ( (lpszBuf = (LPTSTR) LocalAlloc(LPTR, dwSize)) == NULL ) )
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dwSize >>= 1;
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if ( lpszBuf == NULL )
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return 0;
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if ( (hFile = CreateFile(lpszFQFile, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) != INVALID_HANDLE_VALUE )
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{
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while ( ( ReadFile(hFile, (LPVOID) lpszBuf, dwSize, &dwRead, NULL) ) && ( dwRead > 0 ) )
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ulRes = Crc32Compute((PBYTE) lpszBuf, dwRead, ulRes);
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CloseHandle(hFile);
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}
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LocalFree(lpszBuf);
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return ulRes;
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}
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//
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// Internal Functon(s):
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//
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/****************************************************************************\
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Crc32Compute() - Compute 32-bit
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Entry:
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pb - Pointer to buffer to computer CRC on
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cb - Count of bytes in buffer to CRC
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crc32 - Result from previous Crc32Compute call (on first call
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to Crc32Compute, must be CRC32_INITIAL_VALUE!!!!).
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Exit:
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Returns updated CRC value.
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\****************************************************************************/
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static ULONG Crc32Compute(PBYTE pb, DWORD cb, ULONG crc32)
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{
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// Put CRC in form loop wants it.
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//
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crc32 = (-1L - crc32);
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while (cb--)
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crc32 = crc_32_tab[(BYTE) crc32 ^ *pb++] ^ ((crc32 >> 8) & 0x00FFFFFFL);
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// Put CRC in form client wants it.
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//
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return (-1L - crc32);
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}
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