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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">containers.cpp Example File</h1> <span class="small-subtitle">qtestlib/tutorial5/containers.cpp</span> <!-- $$$qtestlib/tutorial5/containers.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the test suite 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 Digia Plc 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="comment">// This file contains benchmarks for comparing QVector against std::vector</span> <span class="preprocessor">#include <QtCore></span> <span class="preprocessor">#include <QVector></span> <span class="preprocessor">#include <vector></span> <span class="preprocessor">#include <qtest.h></span> <span class="keyword">template</span> <span class="operator"><</span><span class="keyword">typename</span> T<span class="operator">></span> <span class="comment">// T is the item type</span> <span class="keyword">class</span> UseCases { <span class="keyword">public</span>: <span class="keyword">virtual</span> <span class="operator">~</span>UseCases() {} <span class="comment">// Use case: Insert \a size items into the vector.</span> <span class="keyword">virtual</span> <span class="type">void</span> insert(<span class="type">int</span> size) <span class="operator">=</span> <span class="number">0</span>; <span class="comment">// Use case: Lookup \a size items from the vector.</span> <span class="keyword">virtual</span> <span class="type">void</span> lookup(<span class="type">int</span> size) <span class="operator">=</span> <span class="number">0</span>; }; <span class="keyword">template</span> <span class="operator"><</span><span class="keyword">typename</span> T<span class="operator">></span> T <span class="operator">*</span> f(T <span class="operator">*</span>ts) <span class="comment">// dummy function to prevent code from being optimized away by the compiler</span> { <span class="keyword">return</span> ts; } <span class="comment">// This subclass implements the use cases using QVector as efficiently as possible.</span> <span class="keyword">template</span> <span class="operator"><</span><span class="keyword">typename</span> T<span class="operator">></span> <span class="keyword">class</span> UseCases_QVector : <span class="keyword">public</span> UseCases<span class="operator"><</span>T<span class="operator">></span> { <span class="type">void</span> insert(<span class="type">int</span> size) { <span class="type"><a href="qvector.html">QVector</a></span><span class="operator"><</span>T<span class="operator">></span> v; T t; QBENCHMARK { <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> size; <span class="operator">+</span><span class="operator">+</span>i) v<span class="operator">.</span>append(t); } } <span class="type">void</span> lookup(<span class="type">int</span> size) { <span class="type"><a href="qvector.html">QVector</a></span><span class="operator"><</span>T<span class="operator">></span> v; T t; <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> size; <span class="operator">+</span><span class="operator">+</span>i) v<span class="operator">.</span>append(t); T <span class="operator">*</span>ts <span class="operator">=</span> <span class="keyword">new</span> T<span class="operator">[</span>size<span class="operator">]</span>; QBENCHMARK { <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> size; <span class="operator">+</span><span class="operator">+</span>i) ts<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> v<span class="operator">.</span>value(i); } f<span class="operator"><</span>T<span class="operator">></span>(ts); <span class="keyword">delete</span><span class="operator">[</span><span class="operator">]</span> ts; } }; <span class="comment">// This subclass implements the use cases using std::vector as efficiently as possible.</span> <span class="keyword">template</span> <span class="operator"><</span><span class="keyword">typename</span> T<span class="operator">></span> <span class="keyword">class</span> UseCases_stdvector : <span class="keyword">public</span> UseCases<span class="operator"><</span>T<span class="operator">></span> { <span class="type">void</span> insert(<span class="type">int</span> size) { std<span class="operator">::</span>vector<span class="operator"><</span>T<span class="operator">></span> v; T t; QBENCHMARK { <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> size; <span class="operator">+</span><span class="operator">+</span>i) v<span class="operator">.</span>push_back(t); } } <span class="type">void</span> lookup(<span class="type">int</span> size) { std<span class="operator">::</span>vector<span class="operator"><</span>T<span class="operator">></span> v; T t; <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> size; <span class="operator">+</span><span class="operator">+</span>i) v<span class="operator">.</span>push_back(t); T <span class="operator">*</span>ts <span class="operator">=</span> <span class="keyword">new</span> T<span class="operator">[</span>size<span class="operator">]</span>; QBENCHMARK { <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> size; <span class="operator">+</span><span class="operator">+</span>i) ts<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> v<span class="operator">[</span>i<span class="operator">]</span>; } f<span class="operator"><</span>T<span class="operator">></span>(ts); <span class="keyword">delete</span><span class="operator">[</span><span class="operator">]</span> ts; } }; <span class="keyword">struct</span> Large { <span class="comment">// A "large" item type</span> <span class="type">int</span> x<span class="operator">[</span><span class="number">1000</span><span class="operator">]</span>; }; <span class="comment">// Symbian devices typically have limited memory</span> <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> <span class="preprocessor"># define LARGE_MAX_SIZE 2000</span> <span class="preprocessor">#else</span> <span class="preprocessor"># define LARGE_MAX_SIZE 20000</span> <span class="preprocessor">#endif</span> <span class="keyword">class</span> tst_vector_vs_std : <span class="keyword">public</span> <span class="type"><a href="qobject.html">QObject</a></span> { Q_OBJECT <span class="keyword">public</span>: tst_vector_vs_std() { useCases_QVector_int <span class="operator">=</span> <span class="keyword">new</span> UseCases_QVector<span class="operator"><</span><span class="type">int</span><span class="operator">></span>; useCases_stdvector_int <span class="operator">=</span> <span class="keyword">new</span> UseCases_stdvector<span class="operator"><</span><span class="type">int</span><span class="operator">></span>; useCases_QVector_Large <span class="operator">=</span> <span class="keyword">new</span> UseCases_QVector<span class="operator"><</span>Large<span class="operator">></span>; useCases_stdvector_Large <span class="operator">=</span> <span class="keyword">new</span> UseCases_stdvector<span class="operator"><</span>Large<span class="operator">></span>; } <span class="keyword">private</span>: UseCases<span class="operator"><</span><span class="type">int</span><span class="operator">></span> <span class="operator">*</span>useCases_QVector_int; UseCases<span class="operator"><</span><span class="type">int</span><span class="operator">></span> <span class="operator">*</span>useCases_stdvector_int; UseCases<span class="operator"><</span>Large<span class="operator">></span> <span class="operator">*</span>useCases_QVector_Large; UseCases<span class="operator"><</span>Large<span class="operator">></span> <span class="operator">*</span>useCases_stdvector_Large; <span class="keyword">private</span> <span class="keyword">slots</span>: <span class="type">void</span> insert_int_data(); <span class="type">void</span> insert_int(); <span class="type">void</span> insert_Large_data(); <span class="type">void</span> insert_Large(); <span class="type">void</span> lookup_int_data(); <span class="type">void</span> lookup_int(); <span class="type">void</span> lookup_Large_data(); <span class="type">void</span> lookup_Large(); }; <span class="type">void</span> tst_vector_vs_std<span class="operator">::</span>insert_int_data() { <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>addColumn<span class="operator"><</span><span class="type">bool</span><span class="operator">></span>(<span class="string">"useStd"</span>); <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>addColumn<span class="operator"><</span><span class="type">int</span><span class="operator">></span>(<span class="string">"size"</span>); <span class="keyword">for</span> (<span class="type">int</span> size <span class="operator">=</span> <span class="number">10</span>; size <span class="operator"><</span> <span class="number">20000</span>; size <span class="operator">+</span><span class="operator">=</span> <span class="number">100</span>) { <span class="keyword">const</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> sizeString <span class="operator">=</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(size); <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>newRow((<span class="string">"std::vector-int--"</span> <span class="operator">+</span> sizeString)<span class="operator">.</span>constData()) <span class="operator"><</span><span class="operator"><</span> <span class="keyword">true</span> <span class="operator"><</span><span class="operator"><</span> size; <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>newRow((<span class="string">"QVector-int--"</span> <span class="operator">+</span> sizeString)<span class="operator">.</span>constData()) <span class="operator"><</span><span class="operator"><</span> <span class="keyword">false</span> <span class="operator"><</span><span class="operator"><</span> size; } } <span class="type">void</span> tst_vector_vs_std<span class="operator">::</span>insert_int() { QFETCH(<span class="type">bool</span><span class="operator">,</span> useStd); QFETCH(<span class="type">int</span><span class="operator">,</span> size); <span class="keyword">if</span> (useStd) useCases_stdvector_int<span class="operator">-</span><span class="operator">></span>insert(size); <span class="keyword">else</span> useCases_QVector_int<span class="operator">-</span><span class="operator">></span>insert(size); } <span class="type">void</span> tst_vector_vs_std<span class="operator">::</span>insert_Large_data() { <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>addColumn<span class="operator"><</span><span class="type">bool</span><span class="operator">></span>(<span class="string">"useStd"</span>); <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>addColumn<span class="operator"><</span><span class="type">int</span><span class="operator">></span>(<span class="string">"size"</span>); <span class="keyword">for</span> (<span class="type">int</span> size <span class="operator">=</span> <span class="number">10</span>; size <span class="operator"><</span> LARGE_MAX_SIZE; size <span class="operator">+</span><span class="operator">=</span> <span class="number">100</span>) { <span class="keyword">const</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> sizeString <span class="operator">=</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(size); <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>newRow((<span class="string">"std::vector-Large--"</span> <span class="operator">+</span> sizeString)<span class="operator">.</span>constData()) <span class="operator"><</span><span class="operator"><</span> <span class="keyword">true</span> <span class="operator"><</span><span class="operator"><</span> size; <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>newRow((<span class="string">"QVector-Large--"</span> <span class="operator">+</span> sizeString)<span class="operator">.</span>constData()) <span class="operator"><</span><span class="operator"><</span> <span class="keyword">false</span> <span class="operator"><</span><span class="operator"><</span> size; } } <span class="type">void</span> tst_vector_vs_std<span class="operator">::</span>insert_Large() { QFETCH(<span class="type">bool</span><span class="operator">,</span> useStd); QFETCH(<span class="type">int</span><span class="operator">,</span> size); <span class="keyword">if</span> (useStd) useCases_stdvector_Large<span class="operator">-</span><span class="operator">></span>insert(size); <span class="keyword">else</span> useCases_QVector_Large<span class="operator">-</span><span class="operator">></span>insert(size); } <span class="type">void</span> tst_vector_vs_std<span class="operator">::</span>lookup_int_data() { <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>addColumn<span class="operator"><</span><span class="type">bool</span><span class="operator">></span>(<span class="string">"useStd"</span>); <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>addColumn<span class="operator"><</span><span class="type">int</span><span class="operator">></span>(<span class="string">"size"</span>); <span class="keyword">for</span> (<span class="type">int</span> size <span class="operator">=</span> <span class="number">10</span>; size <span class="operator"><</span> <span class="number">20000</span>; size <span class="operator">+</span><span class="operator">=</span> <span class="number">100</span>) { <span class="keyword">const</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> sizeString <span class="operator">=</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(size); <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>newRow((<span class="string">"std::vector-int--"</span> <span class="operator">+</span> sizeString)<span class="operator">.</span>constData()) <span class="operator"><</span><span class="operator"><</span> <span class="keyword">true</span> <span class="operator"><</span><span class="operator"><</span> size; <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>newRow((<span class="string">"QVector-int--"</span> <span class="operator">+</span> sizeString)<span class="operator">.</span>constData()) <span class="operator"><</span><span class="operator"><</span> <span class="keyword">false</span> <span class="operator"><</span><span class="operator"><</span> size; } } <span class="type">void</span> tst_vector_vs_std<span class="operator">::</span>lookup_int() { QFETCH(<span class="type">bool</span><span class="operator">,</span> useStd); QFETCH(<span class="type">int</span><span class="operator">,</span> size); <span class="keyword">if</span> (useStd) useCases_stdvector_int<span class="operator">-</span><span class="operator">></span>lookup(size); <span class="comment">// Create a std::vector and run the benchmark.</span> <span class="keyword">else</span> useCases_QVector_int<span class="operator">-</span><span class="operator">></span>lookup(size); <span class="comment">// Create a QVector and run the benchmark.</span> } <span class="type">void</span> tst_vector_vs_std<span class="operator">::</span>lookup_Large_data() { <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>addColumn<span class="operator"><</span><span class="type">bool</span><span class="operator">></span>(<span class="string">"useStd"</span>); <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>addColumn<span class="operator"><</span><span class="type">int</span><span class="operator">></span>(<span class="string">"size"</span>); <span class="keyword">for</span> (<span class="type">int</span> size <span class="operator">=</span> <span class="number">10</span>; size <span class="operator"><</span> LARGE_MAX_SIZE; size <span class="operator">+</span><span class="operator">=</span> <span class="number">100</span>) { <span class="keyword">const</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> sizeString <span class="operator">=</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(size); <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>newRow((<span class="string">"std::vector-Large--"</span> <span class="operator">+</span> sizeString)<span class="operator">.</span>constData()) <span class="operator"><</span><span class="operator"><</span> <span class="keyword">true</span> <span class="operator"><</span><span class="operator"><</span> size; <span class="type"><a href="qtest.html">QTest</a></span><span class="operator">::</span>newRow((<span class="string">"QVector-Large--"</span> <span class="operator">+</span> sizeString)<span class="operator">.</span>constData()) <span class="operator"><</span><span class="operator"><</span> <span class="keyword">false</span> <span class="operator"><</span><span class="operator"><</span> size; } } <span class="type">void</span> tst_vector_vs_std<span class="operator">::</span>lookup_Large() { QFETCH(<span class="type">bool</span><span class="operator">,</span> useStd); QFETCH(<span class="type">int</span><span class="operator">,</span> size); <span class="keyword">if</span> (useStd) useCases_stdvector_Large<span class="operator">-</span><span class="operator">></span>lookup(size); <span class="keyword">else</span> useCases_QVector_Large<span class="operator">-</span><span class="operator">></span>lookup(size); } <a href="qtest.html#QTEST_MAIN">QTEST_MAIN</a>(tst_vector_vs_std) <span class="preprocessor">#include "main.moc"</span></pre> </div> <!-- @@@qtestlib/tutorial5/containers.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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