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- #include "StdAfx.h"
- #include "CRC32.h"
- static unsigned long CRCTable[256] =
- {
- 0x00000000,0x77073096,0xEE0E612C,0x990951BA,0x076DC419,0x706AF48F,
- 0xE963A535,0x9E6495A3,0x0EDB8832,0x79DCB8A4,0xE0D5E91E,0x97D2D988,
- 0x09B64C2B,0x7EB17CBD,0xE7B82D07,0x90BF1D91,0x1DB71064,0x6AB020F2,
- 0xF3B97148,0x84BE41DE,0x1ADAD47D,0x6DDDE4EB,0xF4D4B551,0x83D385C7,
- 0x136C9856,0x646BA8C0,0xFD62F97A,0x8A65C9EC,0x14015C4F,0x63066CD9,
- 0xFA0F3D63,0x8D080DF5,0x3B6E20C8,0x4C69105E,0xD56041E4,0xA2677172,
- 0x3C03E4D1,0x4B04D447,0xD20D85FD,0xA50AB56B,0x35B5A8FA,0x42B2986C,
- 0xDBBBC9D6,0xACBCF940,0x32D86CE3,0x45DF5C75,0xDCD60DCF,0xABD13D59,
- 0x26D930AC,0x51DE003A,0xC8D75180,0xBFD06116,0x21B4F4B5,0x56B3C423,
- 0xCFBA9599,0xB8BDA50F,0x2802B89E,0x5F058808,0xC60CD9B2,0xB10BE924,
- 0x2F6F7C87,0x58684C11,0xC1611DAB,0xB6662D3D,0x76DC4190,0x01DB7106,
- 0x98D220BC,0xEFD5102A,0x71B18589,0x06B6B51F,0x9FBFE4A5,0xE8B8D433,
- 0x7807C9A2,0x0F00F934,0x9609A88E,0xE10E9818,0x7F6A0DBB,0x086D3D2D,
- 0x91646C97,0xE6635C01,0x6B6B51F4,0x1C6C6162,0x856530D8,0xF262004E,
- 0x6C0695ED,0x1B01A57B,0x8208F4C1,0xF50FC457,0x65B0D9C6,0x12B7E950,
- 0x8BBEB8EA,0xFCB9887C,0x62DD1DDF,0x15DA2D49,0x8CD37CF3,0xFBD44C65,
- 0x4DB26158,0x3AB551CE,0xA3BC0074,0xD4BB30E2,0x4ADFA541,0x3DD895D7,
- 0xA4D1C46D,0xD3D6F4FB,0x4369E96A,0x346ED9FC,0xAD678846,0xDA60B8D0,
- 0x44042D73,0x33031DE5,0xAA0A4C5F,0xDD0D7CC9,0x5005713C,0x270241AA,
- 0xBE0B1010,0xC90C2086,0x5768B525,0x206F85B3,0xB966D409,0xCE61E49F,
- 0x5EDEF90E,0x29D9C998,0xB0D09822,0xC7D7A8B4,0x59B33D17,0x2EB40D81,
- 0xB7BD5C3B,0xC0BA6CAD,0xEDB88320,0x9ABFB3B6,0x03B6E20C,0x74B1D29A,
- 0xEAD54739,0x9DD277AF,0x04DB2615,0x73DC1683,0xE3630B12,0x94643B84,
- 0x0D6D6A3E,0x7A6A5AA8,0xE40ECF0B,0x9309FF9D,0x0A00AE27,0x7D079EB1,
- 0xF00F9344,0x8708A3D2,0x1E01F268,0x6906C2FE,0xF762575D,0x806567CB,
- 0x196C3671,0x6E6B06E7,0xFED41B76,0x89D32BE0,0x10DA7A5A,0x67DD4ACC,
- 0xF9B9DF6F,0x8EBEEFF9,0x17B7BE43,0x60B08ED5,0xD6D6A3E8,0xA1D1937E,
- 0x38D8C2C4,0x4FDFF252,0xD1BB67F1,0xA6BC5767,0x3FB506DD,0x48B2364B,
- 0xD80D2BDA,0xAF0A1B4C,0x36034AF6,0x41047A60,0xDF60EFC3,0xA867DF55,
- 0x316E8EEF,0x4669BE79,0xCB61B38C,0xBC66831A,0x256FD2A0,0x5268E236,
- 0xCC0C7795,0xBB0B4703,0x220216B9,0x5505262F,0xC5BA3BBE,0xB2BD0B28,
- 0x2BB45A92,0x5CB36A04,0xC2D7FFA7,0xB5D0CF31,0x2CD99E8B,0x5BDEAE1D,
- 0x9B64C2B0,0xEC63F226,0x756AA39C,0x026D930A,0x9C0906A9,0xEB0E363F,
- 0x72076785,0x05005713,0x95BF4A82,0xE2B87A14,0x7BB12BAE,0x0CB61B38,
- 0x92D28E9B,0xE5D5BE0D,0x7CDCEFB7,0x0BDBDF21,0x86D3D2D4,0xF1D4E242,
- 0x68DDB3F8,0x1FDA836E,0x81BE16CD,0xF6B9265B,0x6FB077E1,0x18B74777,
- 0x88085AE6,0xFF0F6A70,0x66063BCA,0x11010B5C,0x8F659EFF,0xF862AE69,
- 0x616BFFD3,0x166CCF45,0xA00AE278,0xD70DD2EE,0x4E048354,0x3903B3C2,
- 0xA7672661,0xD06016F7,0x4969474D,0x3E6E77DB,0xAED16A4A,0xD9D65ADC,
- 0x40DF0B66,0x37D83BF0,0xA9BCAE53,0xDEBB9EC5,0x47B2CF7F,0x30B5FFE9,
- 0xBDBDF21C,0xCABAC28A,0x53B39330,0x24B4A3A6,0xBAD03605,0xCDD70693,
- 0x54DE5729,0x23D967BF,0xB3667A2E,0xC4614AB8,0x5D681B02,0x2A6F2B94,
- 0xB40BBE37,0xC30C8EA1,0x5A05DF1B,0x2D02EF8D
- };
- #define DO1(buf, i) crc = CRCTable[(crc ^ buf[i]) & 0xff] ^ (crc >> 8)
- #define DO2(buf, i) DO1(buf, i); DO1(buf, i + 1);
- #define DO4(buf, i) DO2(buf, i); DO2(buf, i + 2);
- #define DO8(buf, i) DO4(buf, i); DO4(buf, i + 4);
- #define DO16(buf, i) DO8(buf, i); DO8(buf, i + 8);
- DWORD GetCRC32(const char * buf, size_t len)
- {
- DWORD crc = 0xffffffff;
- if (len >= 16)
- {
- do
- {
- DO16(buf, 0);
- buf += 16;
- len -= 16;
- } while (len >= 16);
- }
- if (len != 0)
- {
- do
- {
- DO1(buf, 0);
- ++buf;
- --len;
- } while (len > 0);
- }
- crc ^= 0xffffffff;
- return crc;
- }
- #ifndef UPPER
- #define UPPER(c) (((c)>='a' && (c) <= 'z') ? ((c)+('A'-'a')) : (c))
- #endif
- #define DO1CI(buf, i) crc = CRCTable[(crc ^ UPPER(buf[i])) & 0xff] ^ (crc >> 8)
- #define DO2CI(buf, i) DO1CI(buf, i); DO1CI(buf, i + 1);
- #define DO4CI(buf, i) DO2CI(buf, i); DO2CI(buf, i + 2);
- #define DO8CI(buf, i) DO4CI(buf, i); DO4CI(buf, i + 4);
- #define DO16CI(buf, i) DO8CI(buf, i); DO8CI(buf, i + 8);
- DWORD GetCaseCRC32(const char * buf, size_t len)
- {
- DWORD crc = 0xffffffff;
- if (16 <= len)
- {
- do
- {
- DO16CI(buf, 0);
- buf += 16;
- len -= 16;
- } while (len >= 16);
- }
- if (0 != len)
- {
- do
- {
- DO1CI(buf, 0);
- ++buf;
- --len;
- } while (len > 0);
- }
- crc ^= 0xffffffff;
- return crc;
- }
- DWORD GetHFILECRC32(HANDLE hFile)
- {
- DWORD dwRetCRC32=0;
- DWORD dwFileSize = GetFileSize(hFile, NULL);
- DWORD dataOffset=0;
- DWORD mapSize=dwFileSize;
- SYSTEM_INFO SysInfo;
- GetSystemInfo(&SysInfo);
- DWORD dwSysGran = SysInfo.dwAllocationGranularity;
- DWORD dwFileMapStart = (dataOffset / dwSysGran) * dwSysGran;
- DWORD dwMapViewSize = (dataOffset % dwSysGran) + mapSize;
- //INT iViewDelta = dataOffset - dwFileMapStart;
- HANDLE hFM = CreateFileMapping(hFile, // handle
- NULL, // security
- PAGE_READONLY, // flProtect
- 0, // high
- dataOffset + mapSize, // low
- NULL); // name
- if (hFM)
- {
- LPVOID lpMapData = MapViewOfFile(hFM,
- FILE_MAP_READ,
- 0,
- dwFileMapStart,
- dwMapViewSize);
- dwRetCRC32=GetCRC32((const char*)lpMapData, dwFileSize);
- if (lpMapData)
- {
- UnmapViewOfFile(lpMapData);
- }
- CloseHandle(hFM);
- }
- return dwRetCRC32;
- }
- DWORD GetFileCRC32(const char* c_szFileName)
- {
- HANDLE hFile = CreateFile(c_szFileName, // name of the file
- GENERIC_READ, // desired access
- FILE_SHARE_READ, // share mode
- NULL, // security attributes
- OPEN_EXISTING, // creation disposition
- FILE_ATTRIBUTE_NORMAL, // flags and attr
- NULL); // template file
- if (INVALID_HANDLE_VALUE == hFile)
- return 0;
- DWORD dwRetCRC32=GetHFILECRC32(hFile);
- CloseHandle(hFile);
- return dwRetCRC32;
- }
- DWORD GetFileSize(const char* c_szFileName)
- {
- HANDLE hFile = CreateFile(c_szFileName, // name of the file
- GENERIC_READ, // desired access
- FILE_SHARE_READ, // share mode
- NULL, // security attributes
- OPEN_EXISTING, // creation disposition
- FILE_ATTRIBUTE_NORMAL, // flags and attr
- NULL); // template file
- if (INVALID_HANDLE_VALUE == hFile)
- return 0;
- DWORD dwSize = GetFileSize(hFile, NULL);
- CloseHandle(hFile);
- return dwSize;
- }
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