mmfile.h
上传用户:zhongxx05
上传日期:2007-06-06
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文件大小:5k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef __CWin32MMFile__
- #define __CWin32MMFile__
- #include "hlxclib/fcntl.h"
- #include "unkimp.h"
- #include "chxfgbuf.h"
- class _CBufferWinMemMapped
- : public IHXBuffer
- , public CUnknownIMP
- {
- DECLARE_UNKNOWN(_CBufferWinMemMapped);
- public:
- _CBufferWinMemMapped()
- : m_pData(NULL)
- , m_ulLength(0)
- , m_ulOffset(0)
- {}
- ~_CBufferWinMemMapped()
- {_UnMap();}
- //IHXBuffer
- //
- STDMETHOD(Get)
- (
- THIS_
- REF(UCHAR*) pData,
- REF(ULONG32) ulLength
- )
- {
- pData = m_pData+m_ulOffset;
- ulLength = m_ulLength;
- return HXR_OK;
- }
- STDMETHOD(Set)
- (
- THIS_
- const UCHAR* pData,
- ULONG32 ulLength
- )
- {
- return E_NOTIMPL;
- }
- STDMETHOD(SetSize)
- (
- THIS_
- ULONG32 ulLength
- )
- {
- return E_NOTIMPL;
- }
- STDMETHOD_(ULONG32,GetSize)
- (
- THIS
- )
- {
- return m_ulLength;
- }
- STDMETHOD_(UCHAR*,GetBuffer)
- (
- THIS
- )
- {
- return m_pData+m_ulOffset;
- }
- private:
- static UINT32 _AllocGran();
- void _UnMap();
- HX_RESULT _SetMapping
- (
- HANDLE hfmoFile,
- UINT32 ulOffsetHigh,
- UINT32 ulOffsetLow ,
- UINT32 ulLength
- );
- friend class CWin32MMFile;
- UCHAR* m_pData;
- UINT32 m_ulLength;
- UINT32 m_ulOffset;
- };
- class CWin32MMFile : public CHXDataFile
- {
- public:
- CWin32MMFile()
- : m_hfmoFile(0)
- , m_hFile(INVALID_HANDLE_VALUE)
- , m_ulPositionHigh(0)
- , m_ulPositionLow(0)
- , m_ulSizeHigh(0)
- , m_ulSizeLow(0)
- {}
- ~CWin32MMFile()
- {Close();}
- /* Create creates a file using the specified mode */
- virtual HX_RESULT Create
- (
- const char *filename,
- UINT16 mode,
- BOOL textflag
- );
- /* Open will open a file with the specified permissions */
- virtual HX_RESULT Open
- (
- const char *filename,
- UINT16 mode,
- BOOL textflag
- );
- /* Close closes a file */
- virtual HX_RESULT Close (void);
-
- /* Seek moves the current file position to the offset from the fromWhere
- specifier */
- virtual HX_RESULT Seek (ULONG32 offset, UINT16 fromWhere);
- /* Tell returns the current file position in the ra file */
- virtual ULONG32 Tell (void);
- /* Read reads up to count bytes of data into buf.
- returns the number of bytes read, EOF, or -1 if the read failed */
- virtual ULONG32 Read
- (
- char* buf,
- ULONG32 count
- );
- /* Read reads up to ulCount bytes of data into ppbufOut.
- returns a result code */
- virtual HX_RESULT ReadToBuffer
- (
- ULONG32 ulCount,
- IHXBuffer** ppbufOut
- );
- /* Write writes up to count bytes of data from buf.
- returns the number of bytes written, or -1 if the write failed */
- virtual ULONG32 Write
- (
- const char *buf,
- ULONG32 count
- );
- /* Rewinds the file to the start of the file */
- virtual HX_RESULT Rewind (void);
- /* Return the file descriptor */
- virtual INT16 GetFd (void);
- /* Delete deletes a file */
- virtual HX_RESULT Delete
- (
- const char *filename
- );
- private:
- HANDLE m_hfmoFile;
- HANDLE m_hFile;
- UINT32 m_ulPositionHigh;
- UINT32 m_ulPositionLow;
- UINT32 m_ulSizeHigh;
- UINT32 m_ulSizeLow;
- };
- #endif //!__CWin32MMFile__