cchx2ihxdataf.h

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/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: cchx2ihxdataf.h,v 1.3.42.3 2004/07/09 01:44:51 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (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.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * 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
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 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
 * ENJOYMENT OR NON-INFRINGEMENT.
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 * Technology Compatibility Kit Test Suite(s) Location:
 *    http://www.helixcommunity.org/content/tck
 * 
 * Contributor(s):
 * 
 * ***** END LICENSE BLOCK ***** */

#ifndef _CCHX2IHX_H_
#define	_CCHX2IHX_H_

/************************************************************************
 *  Includes
 */
#include "hxcom.h"
#include "hxdataf.h"
#include "chxdataf.h"


typedef	HX_RESULT (*FileDeleteFnPtr) (void* pUserData, const char *filename);
typedef	BOOL (*TemporaryFileNameFnPtr) (void* pUserData, const char *tag, char* filename, UINT32 ulBufLen);
typedef	ULONG32 (*FastReadFnPtr) (void* pUserData, const char* buf, ULONG32 count);
typedef	ULONG32 (*FastWriteFnPtr) (void* pUserData, const char* buf, ULONG32 count);


/************************************************************************
 *  CCHX2IHXDataFile
 */
class CCHX2IHXDataFile : public CHXDataFile
{
public:
	/*
	 *  Constructor/Destructor
	 */
	CCHX2IHXDataFile(IHXDataFile* pIHXFile,
			 void* pUserData,
			 TemporaryFileNameFnPtr fpTempFileName,
			 FastReadFnPtr fpFastRead = NULL,
			 FastWriteFnPtr fpFastWrite = NULL,
			 FileDeleteFnPtr fpFileDelete = NULL);

	virtual	~CCHX2IHXDataFile(void);

	/*
	 *  CHXDataFile methods
	 */
	/* GetLastError returns the platform specific file error */
	virtual HX_RESULT	GetLastError		(void);

	virtual BOOL	 	GetTemporaryFileName	(const char *tag, char* name, UINT32 ulBufLen);

	/* Create creates a file using the specified mode */
	virtual HX_RESULT	Create			(const char *filename, UINT16 mode, BOOL textflag = 0);

	/* Open will open a file with the specified permissions */
	virtual HX_RESULT	Open			(const char *filename, UINT16 mode, BOOL textflag = 0);

	/* Close closes a file */
	virtual HX_RESULT	Close			(void);

	/* Returns the size of the file in bytes. */
	virtual ULONG32		GetSize			(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:
	/*
	 *  Private methods
	 */
	inline UINT16 TranslateMode(UINT16 uOpenMode, BOOL bTextflag);

	IHXDataFile* m_pIHXFile;
	FileDeleteFnPtr m_fpFileDelete;
	TemporaryFileNameFnPtr m_fpTempFileName;
	FastReadFnPtr m_fpFastRead;
	FastWriteFnPtr m_fpFastWrite;

	void* m_pUserData;
};
	
#endif // _CHXDATAFILE_H_