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61 lines
1.2 KiB
61 lines
1.2 KiB
//
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// MODULE: CRC.H
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//
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// PURPOSE: Header for CRC support
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//
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// PROJECT: Generic Troubleshooter DLL for Microsoft AnswerPoint
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//
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// COMPANY: Saltmine Creative, Inc. (206)-284-7511 [email protected]
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//
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// AUTHOR: Richard Meadows
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//
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// ORIGINAL DATE: 8/7/97
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//
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// NOTES:
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// 1.
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//
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// Version Date By Comments
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//--------------------------------------------------------------------
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// V0.2 8/7/97 RM Local Version for Memphis
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// V0.3 3/24/98 JM Local Version for NT5
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//
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#ifndef __CCRC_H_
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#define __CCRC_H_ 1
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#include "GenException.h"
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inline CString GlobFormatMessage(DWORD dwLastError)
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{
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CString strMessage;
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void *lpvMessage;
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FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
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NULL,
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dwLastError,
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MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
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(LPTSTR) &lpvMessage, 0, NULL);
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strMessage = (LPCTSTR) lpvMessage;
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LocalFree(lpvMessage);
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return strMessage;
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}
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class CCRC
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{
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const DWORD POLYNOMIAL;
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public:
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CCRC();
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DWORD DscEncode(LPCTSTR szDsc);
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void AppendCRC(LPCTSTR szCache, DWORD dwCRCValue);
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bool Decode(LPCTSTR szDsc, LPCTSTR szCache, const CString& strCacheFileWithinCHM);
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protected:
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DWORD dwCrcTable[256];
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void BuildCrcTable();
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DWORD ComputeCRC(LPCSTR sznBuffer, DWORD dwBufSize, DWORD dwAccum);
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};
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#endif
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