52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
/************************** Module Header ***********************************
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* fileio.h
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* Function Prototypes for File I/O in Kernel mode.
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*
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* NOTE: these functions perform File read, seek operations.
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*
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* Copyright (C) 1991 - 1999 Microsoft Corporation
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*
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****************************************************************************/
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#define CURRENTFILEPTR(pFile) (LPVOID)((LPBYTE)(pFile->pvFilePointer)\
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+ pFile->dwCurrentByteOffset)
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#define ENDOFFILEPTR(pFile) ( pFile->pvFilePointer + \
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pFile->dwTotalSize )
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#define STARTFILEPTR(pFile) ( pFile->pvFilePointer )
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#define STARTFILEOFFSETPTR(pFile,offset) ( pFile->pvFilePointer + \
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offset )
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#define NUMBYTESREMAINING(pFile) ( pFile->dwTotalSize - \
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pFile->dwCurrentByteOffset )
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#define UPDATECURROFFSET(pFile,offset) (pFile->dwCurrentByteOffset +=\
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offset )
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#define DRV_FILE_BEGIN 0
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#define DRV_FILE_CURRENT 1
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#define INVALID_HANDLE_VALUE (HANDLE)-1
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typedef struct _MAPFILE
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{
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HANDLE hHandle; /* Handle to the file, returned by EngLoadModule */
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DWORD dwTotalSize; /* Total Size of the file, as returned by
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* EngMapModule.
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*/
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DWORD dwCurrentByteOffset; /* Current Byte Offset in the file.
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* Updated after each read and DrvSetFile-
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* Pointer.
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*/
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PVOID pvFilePointer; /* Start of the file pointer, as returned
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* EngMapModule
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*/
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struct _MAPFILE *pNext; /* Next File Pointer.*/
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}MAPFILE, * PMAPFILE;
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