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author | Qt Continuous Integration System <qt-info@nokia.com> | 2011-03-27 23:34:33 (GMT) |
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committer | Qt Continuous Integration System <qt-info@nokia.com> | 2011-03-27 23:34:33 (GMT) |
commit | f5542efa32c0e28f28b361c554f9ae2c3f6fc546 (patch) | |
tree | 6c2a8b9a46fcda2c72b5318bca247c46fc0bf36a /doc/src/snippets/code/doc_src_q3memarray.cpp | |
parent | cdbb761416996efef99e6eccc7f42730d64f35cb (diff) | |
parent | 8faad8f5e7ddf03b4bf19ef51ddd1ad3c3b5f968 (diff) | |
download | Qt-f5542efa32c0e28f28b361c554f9ae2c3f6fc546.zip Qt-f5542efa32c0e28f28b361c554f9ae2c3f6fc546.tar.gz Qt-f5542efa32c0e28f28b361c554f9ae2c3f6fc546.tar.bz2 |
Merge branch '4.7' of scm.dev.nokia.troll.no:qt/qt-doc-staging into 4.7-integration
* '4.7' of scm.dev.nokia.troll.no:qt/qt-doc-staging: (185 commits)
qdoc: Avoid infinite loops in table of contents generation.
Removed the documentation from the install rule.
qdoc: Added the <othermeta> element.
qdoc: Completed changing <section> structure.
Doc: Fixed reference to absolete API in exceptionsafety.html
Doc: Removed links to obsolete API in QResource
Doc: Fixed broken links in QIcon::fromTheme()
Doc: Fixed doc bug in undo framework example
Doc: Fixed typo.
qdoc: Changed <section> structure.
Doc: Typo fixes
Doc: Fixed snippet documenting QMetaObject::classInfo
Doc: Cannot alter SelectionMode of a combobox's view
qdoc: Added <publisher> and <permissions> elements.
qdoc: Added <component> element to contain the module name.
qdoc: Added <prodinfo> element and its contents to the metadata.
Doc: Fixed a doc bug in the Rogue example
Doc: Small change to QByteArray::resize()
Doc: Small change to ListModel docs
Doc: QtDemo now gives error message when example doc cannot be loaded
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Diffstat (limited to 'doc/src/snippets/code/doc_src_q3memarray.cpp')
-rw-r--r-- | doc/src/snippets/code/doc_src_q3memarray.cpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/doc/src/snippets/code/doc_src_q3memarray.cpp b/doc/src/snippets/code/doc_src_q3memarray.cpp new file mode 100644 index 0000000..2c91050 --- /dev/null +++ b/doc/src/snippets/code/doc_src_q3memarray.cpp @@ -0,0 +1,108 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] +#include <q3memarray.h> +#include <stdio.h> + +Q3MemArray<int> fib( int num ) // returns fibonacci array +{ + Q_ASSERT( num > 2 ); + Q3MemArray<int> 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<int> 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] + + +//! [2] +// MyStruct may be padded to 4 or 8 bytes +struct MyStruct +{ + short i; // 2 bytes + char c; // 1 byte +}; + +Q3MemArray<MyStruct> 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 >> <something>; // 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] |