unix_pref.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** 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, 
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 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
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 * 
 * Contributor(s): 
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 * ***** END LICENSE BLOCK ***** */ 

#ifndef _UNIX_PREF
#define	_UNIX_PREF

#include "pref.h"
#include <stdio.h>

#define _MAX_KEY  512

struct IHXBuffer;
class CHXSimpleList;
class CHXMapStringToOb;

class CUnixPref : public CPref 
{
public:
	/* 	call open_pref() to automatically create the correct 
		specific preference object. */

	/*	automatically reads all prefs into memory. */
	static	CUnixPref*		    open_pref (
							  const char* pCompanyName
							, const char* pProductName
							, int nProdMajorVer
							, int nProdMinorVer);
	
	/* 	class destructor - writes prefs to disk. */	
	virtual					~CUnixPref 		(void);

	/*  read_pref reads the preference specified by Key to the Buffer. */	
    virtual HX_RESULT read_pref(const char* pPrefKey, IHXBuffer*& pBuffer);

                                                                        
	/*  write_pref writes (to memory) the preference specified by Key from the 
		Buffer. */	                                                                            
    virtual HX_RESULT write_pref(const char* pPrefKey, IHXBuffer* pBuffer);

    /*  delete_pref deletes the preference specified by Key from the Buffer. */	                                                                            
    virtual HX_RESULT    delete_pref      (const char* pPrefKey); 

    /* commit_prefs saves all changes to the prefs to disk (e.g. on Unix) */ 
    virtual HX_RESULT commit_prefs();

    virtual HX_RESULT		init_pref(
					      const char* pCompanyName
					    , const char* pProductName
					    , int nProdMajorVer
					    , int nProdMinorVer);

    /*  remove_indexed_pref removes indexed preference specified by Key */       
    HX_RESULT         remove_indexed_pref(const char* pPrefKey); 
    virtual HX_RESULT remove_pref(const char* pPrefKey);

    HX_RESULT	BeginSubPref(const char* szSubPref);
    HX_RESULT	EndSubPref();

    HX_RESULT	GetPrefKey(UINT32 nIndex,IHXBuffer*& pBuffer);

protected:
	
	// Constructor NOTE: use open_pref() to create an instance of this class
							CUnixPref(
							  const char* pCompanyName
							, const char* pProductName
							, int nProdMajorVer
							, int nProdMinorVer);

    BOOL            m_bWrite;							
    char*	    m_pPath;
    int		    mFileID;
    FILE*	    mFile;
    char            m_RootKeyName[_MAX_KEY]; /* Flawfinder: ignore */

    BOOL            EscapeNewLine(const char* pLine, char*& pOutLine);
    BOOL            UnescapeNewLine(const char* pLine, char*& pOutLine);
    void            ConstructFamily(CHXString &ret);
    void            ConstructPref(const char *pref, CHXString &ret);
    void            ConstructPrefAssignment(const char *pref, const char *pValue,
					    CHXString &ret, BOOL bEscapeValue);

    int m_nMajor;
    int m_nMinor;
    CHXString m_pCompany;
    CHXString m_pProduct;
};

#endif // _UNIX_PREF