/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the documentation of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions ** contained in the Technology Preview License Agreement accompanying ** this package. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ //! [0] #include #include Q3MemArray fib( int num ) // returns fibonacci array { Q_ASSERT( num > 2 ); Q3MemArray f( num ); // array of ints f[0] = f[1] = 1; for ( int i = 2; i < num; i++ ) f[i] = f[i-1] + f[i-2]; return f; } int main() { Q3MemArray a = fib( 6 ); // get first 6 fibonaccis for ( int i = 0; i < a.size(); i++ ) qDebug( "%d: %d", i, a[i] ); qDebug( "1 is found %d times", a.contains(1) ); qDebug( "5 is found at index %d", a.find(5) ); return 0; } //! [0] //! [1] 0: 1 1: 1 2: 2 3: 3 4: 5 5: 8 1 is found 2 times 5 is found at index 4 //! [1] //! [2] // MyStruct may be padded to 4 or 8 bytes struct MyStruct { short i; // 2 bytes char c; // 1 byte }; Q3MemArray a(1); a[0].i = 5; a[0].c = 't'; MyStruct x; x.i = '5'; x.c = 't'; int i = a.find( x ); // may return -1 if the pad bytes differ //! [2] //! [3] static char bindata[] = { 231, 1, 44, ... }; QByteArray a; a.setRawData( bindata, sizeof(bindata) ); // a points to bindata QDataStream s( a, IO_ReadOnly ); // open on a's data s >> ; // read raw bindata a.resetRawData( bindata, sizeof(bindata) ); // finished //! [3] //! [4] static char bindata[] = { 231, 1, 44, ... }; QByteArray a, b; a.setRawData( bindata, sizeof(bindata) ); // a points to bindata a.resize( 8 ); // will crash b = a; // will crash a[2] = 123; // might crash // forget to resetRawData: will crash //! [4]