wrvstrng.cpp

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, 
 * 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 ***** */ 

#include "hxcom.h"
#include "hxtypes.h"
#include "hxresult.h"
#include "hxstring.h"
#include "hxwinreg.h"

#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static const char HX_THIS_FILE[] = __FILE__;
#endif

CWinRegStringValue::CWinRegStringValue(const char* szName, HKEY hkParent)
    : AWinRegValue(szName, hkParent)
{
}

CWinRegStringValue::~CWinRegStringValue()
{
}

CWinRegStringValue& 
CWinRegStringValue::operator=(const char* szNewValue)
{
    FromString(szNewValue);

    return *this;
}

BOOL 
CWinRegStringValue::IsString()
{
    UINT32 ulType;
    if
    (
	RegQueryValueEx
	(
	    m_hkParent,
	    OS_STRING(m_sName),
	    NULL,
	    &ulType,
	    NULL,
	    NULL
	) == ERROR_SUCCESS
	&&
	ulType == REG_SZ
    )
    {
	return TRUE;
    }

    return FALSE;
}

BOOL 
CWinRegStringValue::AsString(CHXString& rsValue)
{
    UINT32 ulType;
    UINT32 ulSize;
    
    rsValue.Empty();
    
    if
    (
	RegQueryValueEx
	(
	    m_hkParent,
	    OS_STRING(m_sName),
	    NULL,
	    &ulType,
	    NULL,
	    &ulSize
	) == ERROR_SUCCESS
	&&
	ulType == REG_SZ
    )
    {
	if (!ulSize)
	{
	    return TRUE;
	}

	++ulSize;

	if
	(
	    RegQueryValueEx
	    (
		m_hkParent,
		OS_STRING(m_sName),
		NULL,
		&ulType,
		(unsigned char*)rsValue.GetBufferSetLength(ulSize),
		&ulSize
	    ) == ERROR_SUCCESS
	)
	{
	    return TRUE;
	}
    }

    return FALSE;
}

BOOL 
CWinRegStringValue::FromString(const char* szNew)
{
    if
    (
	RegSetValueEx
	(
	    m_hkParent,
	    OS_STRING(m_sName),
	    NULL,
	    REG_SZ,
	    (unsigned char*)szNew,
	    strlen(szNew)
	) == ERROR_SUCCESS
    )
    {
	return TRUE;
    }

    return FALSE;
}

BOOL 
CWinRegStringValue::DoesExist()
{
    return IsString();
}