www.pudn.com > MP3CORD.rar > properties.h

/*____________________________________________________________________________ 
	 
	FreeAmp - The Free MP3 Player 
 
	Portions Copyright (C) 1998-1999 EMusic.com 
 
	This program is free software; you can redistribute it and/or modify 
	it under the terms of the GNU General Public License as published by 
	the Free Software Foundation; either version 2 of the License, or 
	(at your option) any later version. 
 
	This program is distributed in the hope that it will be useful, 
	but WITHOUT ANY WARRANTY; without even the implied warranty of 
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
	GNU General Public License for more details. 
 
	You should have received a copy of the GNU General Public License 
	along with this program; if not, write to the Free Software 
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
	 
	$Id: properties.h,v 1.5 1999/11/03 19:44:48 robert Exp $ 
____________________________________________________________________________*/ 
 
#ifndef INCLUDED_PROPERTIES_H_ 
#define INCLUDED_PROPERTIES_H_ 
 
#include  
#include "config.h" 
#include "errors.h" 
 
class PropValue { 
 public: 
    virtual ~PropValue() {} 
}; 
 
class StringPropValue : public PropValue { 
 public: 
    StringPropValue(const char *pChars) { 
	m_pChars = NULL; 
	m_length = 0; 
	if (pChars) { 
	    m_length = strlen(pChars); 
	    m_pChars = new char[m_length+1]; 
	    memcpy(m_pChars,pChars,m_length); 
	    m_pChars[m_length] = '\0'; 
	} 
    } 
    virtual ~StringPropValue() { 
	if (m_pChars) { 
	    delete m_pChars; 
	    m_pChars = 0; 
	    m_length = 0; 
	} 
    } 
    const char *GetString() { return m_pChars; } 
 private: 
    char *m_pChars; 
    int32 m_length; 
}; 
 
class Int32PropValue : public PropValue { 
 public: 
    Int32PropValue(int32 i) { 
	m_int = i; 
    } 
    virtual ~Int32PropValue() {} 
    int32 GetInt32() { return m_int; } 
 private: 
    int32 m_int; 
}; 
 
class PropertyWatcher { 
 public: 
    virtual Error PropertyChange(const char *, PropValue *) = 0; 
}; 
 
class Properties { 
 public: 
    virtual Error GetProperty(const char *, PropValue **) = 0; 
    virtual Error SetProperty(const char *, PropValue *) = 0; 
    virtual Error RegisterPropertyWatcher(const char *, PropertyWatcher *) = 0; 
    virtual Error RemovePropertyWatcher(const char *, PropertyWatcher *) = 0; 
}; 
 
 
#endif // _PROPERTIES_H_