101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
/************************************************************************
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Copyright (c) 2000 - 2000 Microsoft Corporation
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Module Name :
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metadata.h
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Abstract :
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Main header for code for reading and writting to the metadata.
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Author :
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Revision History :
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***********************************************************************/
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// These functions may throw a ComError.
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//
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void SafeWriteFile( HANDLE hFile, void *pBuffer, DWORD dwSize );
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void SafeReadFile( HANDLE hFile, void *pBuffer, DWORD dwSize );
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void SafeWriteStringHandle( HANDLE hFile, StringHandle & str );
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StringHandle SafeReadStringHandle( HANDLE hFile );
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void SafeWriteFile( HANDLE hFile, WCHAR * str );
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void SafeReadFile( HANDLE hFile, WCHAR ** pStr );
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void SafeWriteSid( HANDLE hFile, SidHandle & Sid );
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void SafeReadSid( HANDLE hFile, SidHandle & sid );
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template <class T>
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void SafeWriteFile( HANDLE hFile, T Data )
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{
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SafeWriteFile( hFile, &Data, sizeof( Data ) );
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}
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template <class T>
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void SafeReadFile( HANDLE hFile, T *pBuffer)
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{
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SafeReadFile( hFile, pBuffer, sizeof(*pBuffer) );
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}
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void SafeWriteBlockBegin( HANDLE hFile, GUID BlockGuid );
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void SafeWriteBlockEnd( HANDLE hFile, GUID BlockGuid );
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void SafeReadBlockBegin( HANDLE hFile, GUID BlockGuid );
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void SafeReadBlockEnd( HANDLE hFile, GUID BlockGuid );
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//
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// allows any one of several GUIDs.
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//
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int SafeReadGuidChoice( HANDLE hFile, const GUID * guids[] );
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class CQmgrStateFiles
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{
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auto_FILE_HANDLE m_Files[2];
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auto_ptr<WCHAR> m_FileNames[2];
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UINT64 m_ExpandSize[2];
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INT64 m_OriginalFileSizes[2];
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DWORD m_CurrentIndex;
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static auto_ptr<WCHAR> GetNameFromIndex( DWORD dwIndex );
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static auto_FILE_HANDLE OpenMetadataFile( auto_ptr<WCHAR> FileName );
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public:
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CQmgrStateFiles();
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HANDLE GetNextStateFile();
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void UpdateStateFile();
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HANDLE GetCurrentStateFile();
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void ExtendMetadata( INT64 ExtendAmount = ( METADATA_PREALLOC_SIZE + METADATA_PADDING ) );
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void ShrinkMetadata();
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};
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class CQmgrReadStateFile
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{
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private:
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CQmgrStateFiles & m_StateFiles;
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HANDLE m_FileHandle;
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public:
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CQmgrReadStateFile( CQmgrStateFiles & StateFiles );
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HANDLE GetHandle() { return m_FileHandle;}
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void ValidateEndOfFile();
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};
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class CQmgrWriteStateFile
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{
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private:
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CQmgrStateFiles & m_StateFiles;
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HANDLE m_FileHandle;
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public:
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CQmgrWriteStateFile( CQmgrStateFiles & StateFiles );
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HANDLE GetHandle() { return m_FileHandle;}
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void CommitFile();
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};
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