195 lines
3.3 KiB
C
195 lines
3.3 KiB
C
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/*++
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Copyright (c) 1995-1999 Microsoft Corporation
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Module Name:
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file.h
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Abstract:
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Domain Name System (DNS) Server
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File mapping definitions and declarations.
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Author:
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Jim Gilroy (jamesg) March 1995
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Revision History:
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--*/
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#ifndef _FILE_INCLUDED_
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#define _FILE_INCLUDED_
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//
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// Mapped file structure
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//
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typedef struct
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{
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HANDLE hFile;
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HANDLE hMapping;
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PVOID pvFileData;
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DWORD cbFileBytes;
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}
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MAPPED_FILE, * PMAPPED_FILE;
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//
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// Buffer structure
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//
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typedef struct _Buffer
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{
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HANDLE hFile;
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DWORD cchLength;
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PCHAR pchStart;
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PCHAR pchEnd;
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PCHAR pchCurrent;
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DWORD cchBytesLeft;
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DWORD dwLineCount;
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}
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BUFFER, *PBUFFER;
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#define RESET_BUFFER(pBuf) \
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{ \
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PBUFFER _pbuf = (pBuf); \
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_pbuf->pchCurrent = _pbuf->pchStart; \
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_pbuf->cchBytesLeft = _pbuf->cchLength; \
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}
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#define IS_EMPTY_BUFFER(pBuf) (pBuf->pchCurrent == pBuf->pchStart)
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//
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// Sundown: Following macros assume buffer length < 4GB.
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//
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#define BUFFER_LENGTH_TO_CURRENT( pBuf ) \
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( (DWORD) ((pBuf)->pchCurrent - (pBuf)->pchStart) )
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#define BUFFER_LENGTH_FROM_CURRENT_TO_END( pBuf ) \
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( (DWORD) ((pBuf)->pchEnd - (pBuf)->pchCurrent) )
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#define MAX_FORMATTED_BUFFER_WRITE (0x2000) // 8K
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// hFile field may be overloaded in non-file case
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// to indicate STACK or HEAP data
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#define BUFFER_NONFILE_STACK ((HANDLE)(-1))
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#define BUFFER_NONFILE_HEAP ((HANDLE)(-3))
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//
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// File mapping routines
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//
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DNS_STATUS
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OpenAndMapFileForReadW(
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IN LPWSTR pszFilePathName,
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IN OUT PMAPPED_FILE pmfFile,
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IN BOOL fMustFind
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);
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DNS_STATUS
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OpenAndMapFileForReadA(
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IN LPSTR pszFilePathName,
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IN OUT PMAPPED_FILE pmfFile,
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IN BOOL fMustFind
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);
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#ifdef UNICODE
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#define OpenAndMapFileForRead(p,m,f) OpenAndMapFileForReadW(p,m,f)
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#else
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#define OpenAndMapFileForRead(p,m,f) OpenAndMapFileForReadA(p,m,f)
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#endif
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VOID
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CloseMappedFile(
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IN PMAPPED_FILE pmfFile
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);
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//
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// File writing routines
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//
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HANDLE
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OpenWriteFileExW(
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IN LPWSTR pszFileName,
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IN BOOLEAN fAppend
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);
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HANDLE
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OpenWriteFileExA(
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IN LPSTR pszFileName,
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IN BOOLEAN fAppend
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);
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#ifdef UNICODE
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#define OpenWriteFileEx(p,f) OpenWriteFileExW(p,f)
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#else
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#define OpenWriteFileEx(p,f) OpenWriteFileExA(p,f)
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#endif
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BOOL
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FormattedWriteFile(
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IN HANDLE hFile,
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IN PCHAR pszFormat,
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...
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);
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DWORD
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WriteMessageToFile(
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IN HANDLE hFile,
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IN DWORD dwMessageId,
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...
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);
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//
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// Miscellaneous file utilities
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//
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VOID
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ConvertUnixFilenameToNt(
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IN OUT LPSTR pszFileName
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);
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//
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// Writing using file buffer
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//
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BOOL
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WriteBufferToFile(
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IN PBUFFER pBuffer
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);
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BOOL
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FormattedWriteToFileBuffer(
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IN PBUFFER pBuffer,
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IN PCHAR pszFormat,
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...
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);
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VOID
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FASTCALL
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InitializeFileBuffer(
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IN PBUFFER pBuffer,
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IN PCHAR pData,
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IN DWORD dwLength,
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IN HANDLE hFile
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);
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VOID
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CleanupNonFileBuffer(
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IN PBUFFER pBuffer
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);
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#endif // _FILE_INCLUDED_
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