qsettings_win.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

    } , {
	RegQueryValueExA( handle, e.isEmpty() ? (const char*)0 : (const char*)e.local8Bit(), NULL, &type, data, &size );
    } );

    QByteArray result;
    result.setRawData( (const char*)data, size );
    RegCloseKey( handle );

    return result;
}

void QSettingsPrivate::sysInit()
{
    sysd = new QSettingsSysPrivate( this );
}

void QSettingsPrivate::sysClear()
{
    delete sysd;
}

bool QSettingsPrivate::sysSync()
{
    if ( sysd->local )
	RegFlushKey( sysd->local );
    if ( sysd->user )
	RegFlushKey( sysd->user );
    return TRUE;
}

bool QSettingsPrivate::sysReadBoolEntry(const QString &key, bool def, bool *ok ) const
{
    return sysReadNumEntry( key, def, ok );
}

double QSettingsPrivate::sysReadDoubleEntry( const QString &key, double def, bool *ok ) const
{
    Q_ASSERT(sysd);

    if ( ok )
	*ok = FALSE;
    ulong type;
    QByteArray array = sysd->readKey( key, type );
    if ( type != REG_BINARY ) {
	char *data = array.data();
	array.resetRawData( data, array.size() );
	delete[] data;
	return def;
    }
    if ( array.size() != sizeof(double) )
	return def;

    if ( ok )
	*ok = TRUE;

    double res = 0;
    char* data = (char*)&res;
    for ( int i = 0; i < sizeof(double); ++i )
	data[i] = array[ i ];

    char *adata = array.data();
    array.resetRawData( adata, array.size() );
    delete[] adata;
    return res;
}

int QSettingsPrivate::sysReadNumEntry(const QString &key, int def, bool *ok ) const
{
    Q_ASSERT(sysd);

    if ( ok )
	*ok = FALSE;
    ulong type;
    QByteArray array = sysd->readKey( key, type );
    if ( type != REG_DWORD ) {
	char *data = array.data();
	array.resetRawData( data, array.size() );
	delete[] data;

	return def;
    }

    if ( array.size() != sizeof(int) )
	return def;

    if ( ok )
	*ok = TRUE;

    int res = 0;
    char* data = (char*)&res;
    for ( int i = 0; i < sizeof(int); ++i )
	data[i] = array[ i ];

    char *adata = array.data();
    array.resetRawData( adata, array.size() );
    delete[] adata;
    return res;
}

QString QSettingsPrivate::sysReadEntry(const QString &key, const QString &def, bool *ok ) const
{
    if ( ok ) // no, everything is not ok
	*ok = FALSE;

    ulong type;
    QByteArray array = sysd->readKey( key, type );
    if ( type != REG_SZ ) {
	char *data = array.data();
	array.resetRawData( data, array.size() );
	delete[] data;
	return def;
    }

    if ( ok )
	*ok = TRUE;
    QString result = QString::null;

    QT_WA( {
	int s = array.size();
	for ( int i = 0; i < s; i+=2 ) {
	    QChar c( array[ i ], array[ i+1 ] );
	    if( !c.isNull() )
		result+=c;
	}
    } , {
	result = QString::fromLocal8Bit( array );
    } );
    
    if ( array.size() == 2 && result.isNull() )
	result = "";

    char *data = array.data();
    array.resetRawData( data, array.size() );
    delete[] data;

    return result;
}

bool QSettingsPrivate::sysWriteEntry( const QString &key, bool value )
{
    return sysWriteEntry( key, (int)value );
}

bool QSettingsPrivate::sysWriteEntry( const QString &key, double value )
{
    Q_ASSERT(sysd);

    QByteArray array( sizeof(double) );
    const char *data = (char*)&value;

    for ( int i = 0; i < sizeof(double); ++i )
	array[i] = data[i];

    return sysd->writeKey( key, array, REG_BINARY );
}

bool QSettingsPrivate::sysWriteEntry( const QString &key, int value )
{
    Q_ASSERT(sysd);

    QByteArray array( sizeof(int) );
    const char* data = (char*)&value;
    for ( int i = 0; i < sizeof(int ); ++i )
	array[i] = data[i];

    return sysd->writeKey( key, array, REG_DWORD );
}

bool QSettingsPrivate::sysWriteEntry( const QString &key, const QString &value )
{
    Q_ASSERT(sysd);

    QByteArray array( 0 );
    QT_WA( {
	array.resize( value.length() * 2 + 2 );
	const QChar *data = value.unicode();
	int i;
	for ( i = 0; i < (int)value.length(); ++i ) {
	    array[ 2*i ] = data[ i ].cell();
	    array[ (2*i)+1 ] = data[ i ].row();
	}

	array[ (2*i) ] = 0;
	array[ (2*i)+1 ] = 0;
    } , {
	array.resize( value.length() );
	array = value.local8Bit();
    } );

    return sysd->writeKey( key, array, REG_SZ );
}

bool QSettingsPrivate::sysRemoveEntry( const QString &key )
{
    Q_ASSERT(sysd);

    QString e;
    LONG res;

    HKEY handle = 0;
    for ( QStringList::Iterator it = sysd->paths.fromLast(); it != sysd->paths.end(); --it ) {
	QString k = (*it).isEmpty() ? key : *it + "/" + key;
	handle = sysd->openKey( k, FALSE, TRUE );
	e = sysd->entry( k );
	if ( handle )
	    break;
    }
    if ( !handle )
	return TRUE;
    if ( e == "Default" || e == "." )
	e = "";
    QT_WA( {
	res = RegDeleteValueW( handle, (TCHAR*)e.ucs2() );
    } , {
	res = RegDeleteValueA( handle, e.local8Bit() );
    } );

    if ( res != ERROR_SUCCESS && res != ERROR_FILE_NOT_FOUND ) {
#if defined(QT_CHECK_STATE)
	qSystemWarning( "Error deleting value " + key, res );
#endif
	return FALSE;
    }
    char vname[2];
    DWORD vnamesz = 1;
    FILETIME lastWrite;
#ifdef Q_OS_TEMP
    LONG res2 = RegEnumValue( handle, 0, (LPWSTR)vname, &vnamesz, NULL, NULL, NULL, NULL );
    LONG res3 = RegEnumKeyEx( handle, 0, (LPWSTR)vname, &vnamesz, NULL, NULL, NULL, &lastWrite );
#else
    LONG res2 = RegEnumValueA( handle, 0, vname, &vnamesz, NULL, NULL, NULL, NULL );
    LONG res3 = RegEnumKeyExA( handle, 0, vname, &vnamesz, NULL, NULL, NULL, &lastWrite );
#endif
    if ( res2 == ERROR_NO_MORE_ITEMS && res3 == ERROR_NO_MORE_ITEMS )
#ifdef Q_OS_TEMP
	RegDeleteKeyW( handle, L"" );
#else
    RegDeleteKeyA( handle, "" );
#endif
    else
	RegCloseKey( handle );
    return TRUE;
}

QStringList QSettingsPrivate::sysEntryList( const QString &key ) const
{
    Q_ASSERT(sysd);

    QStringList result;

    HKEY handle = 0;
    for ( QStringList::Iterator it = sysd->paths.fromLast(); it != sysd->paths.end(); --it ) {
	QString k = (*it).isEmpty() ? key + "/fake" : *it + "/" + key + "/fake";
	handle = sysd->openKey( k, FALSE );
	if ( handle )
	    break;
    }
    if ( !handle )
	return result;

    DWORD count;
    DWORD maxlen;
    
    QT_WA( {
	RegQueryInfoKeyW( handle, NULL, NULL, NULL, NULL, NULL, NULL, &count, &maxlen, NULL, NULL, NULL );
    } , {
	RegQueryInfoKeyA( handle, NULL, NULL, NULL, NULL, NULL, NULL, &count, &maxlen, NULL, NULL, NULL );
    } );
    maxlen++;
    DWORD index = 0;

    TCHAR *vnameT = new TCHAR[ maxlen ];
    char *vnameA = new char[ maxlen ];
    QString qname;

    DWORD vnamesz = 0;
    LONG res = ERROR_SUCCESS;

    while ( res != ERROR_NO_MORE_ITEMS ) {
	vnamesz = maxlen;
	QT_WA( {
	    res = RegEnumValueW( handle, index, vnameT, &vnamesz, NULL, NULL, NULL, NULL );
	    if ( res == ERROR_SUCCESS )
		qname = QString::fromUcs2( (ushort*)vnameT );
	} , {
	    res = RegEnumValueA( handle, index, vnameA, &vnamesz, NULL, NULL, NULL, NULL );
	    if ( res == ERROR_SUCCESS )
		qname = vnameA;
	} );
	if ( res == ERROR_NO_MORE_ITEMS )
	    break;
	if ( qname.isEmpty() )
	    result.append( "Default" );
	else
	    result.append( qname );
	++index;
    }

    delete [] vnameA;
    delete [] vnameT;

    RegCloseKey( handle );
    return result;
}

QStringList QSettingsPrivate::sysSubkeyList( const QString &key ) const
{
    Q_ASSERT(sysd);

    QStringList result;

    HKEY handle = 0;
    for ( QStringList::Iterator it = sysd->paths.fromLast(); it != sysd->paths.end(); --it ) {
	QString k = (*it).isEmpty() ? key + "/fake" : *it + "/" + key + "/fake";
	handle = sysd->openKey( k, FALSE );
	if ( handle )
	    break;
    }
    if ( !handle )
	return result;

    DWORD count;
    DWORD maxlen;
    QT_WA( {
	RegQueryInfoKeyW( handle, NULL, NULL, NULL, &count, &maxlen, NULL, NULL, NULL, NULL, NULL, NULL );
	maxlen++;
    } , {
	RegQueryInfoKeyA( handle, NULL, NULL, NULL, &count, &maxlen, NULL, NULL, NULL, NULL, NULL, NULL );
    } );

    DWORD index = 0;
    FILETIME lastWrite;

    TCHAR *vnameT = new TCHAR[ maxlen ];
    char *vnameA = new char[ maxlen ];
    QString qname;

    DWORD vnamesz = 0;
    LONG res = ERROR_SUCCESS;

    while ( res != ERROR_NO_MORE_ITEMS ) {
	vnamesz = maxlen;
	QT_WA( {
	    res = RegEnumKeyExW( handle, index, vnameT, &vnamesz, NULL, NULL, NULL, &lastWrite );
	    if ( res == ERROR_SUCCESS )
		qname = QString::fromUcs2( (ushort*)vnameT );
	} , {
	    res = RegEnumKeyExA( handle, index, vnameA, &vnamesz, NULL, NULL, NULL, &lastWrite );
	    if ( res == ERROR_SUCCESS )
		qname = vnameA;
	} );

	if ( res == ERROR_NO_MORE_ITEMS )
	    break;
	result.append( qname );
	++index;
    }

    delete [] vnameA;
    delete [] vnameT;

    RegCloseKey( handle );
    return result;
}

void QSettingsPrivate::sysInsertSearchPath( QSettings::System s, const QString &path )
{
    Q_ASSERT(sysd);

    if ( s != QSettings::Windows || path.isEmpty() )
	return;
    QString p = path;
    if ( p[0] != '/' )
	p = "/" + p;
    sysd->paths.append( p );
}

void QSettingsPrivate::sysRemoveSearchPath( QSettings::System s, const QString &path )
{
    Q_ASSERT(sysd);

    if ( s != QSettings::Windows || path.isEmpty() )
	return;
    QString p = path;
    if ( p[0] != '/' )
	p = "/" + p;
    sysd->paths.remove( p );
}

#endif //QT_NO_SETTINGS