unix_pref.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: unix_pref.h,v 1.2.42.3 2004/07/09 01:47:54 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
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 * 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
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 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
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 * This file is part of the Helix DNA Technology. RealNetworks is the
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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