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