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<?xml version="1.0" encoding="UTF-8"?>
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<h1 class="title">main.cpp Example File</h1>
<span class="small-subtitle">script/qscript/main.cpp</span>
<!-- $$$script/qscript/main.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** &quot;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 The Qt Company Ltd 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
** &quot;AS IS&quot; 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.&quot;
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include &lt;qscriptengine.h&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QFile&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QTextStream&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QStringList&gt;</span>
<span class="preprocessor">#include &lt;QtGui/QApplication&gt;</span>
<span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<span class="preprocessor">#include &quot;bytearrayclass.h&quot;</span>
<span class="keyword">static</span> <span class="type">bool</span> wantsToQuit;
<span class="keyword">static</span> <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> qtscript_quit(<span class="type"><a href="qscriptcontext.html">QScriptContext</a></span> <span class="operator">*</span>ctx<span class="operator">,</span> <span class="type"><a href="qscriptengine.html">QScriptEngine</a></span> <span class="operator">*</span>eng)
{
Q_UNUSED(ctx);
wantsToQuit <span class="operator">=</span> <span class="keyword">true</span>;
<span class="keyword">return</span> eng<span class="operator">-</span><span class="operator">&gt;</span>undefinedValue();
}
<span class="keyword">static</span> <span class="type">void</span> interactive(<span class="type"><a href="qscriptengine.html">QScriptEngine</a></span> <span class="operator">*</span>eng)
{
<span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> global <span class="operator">=</span> eng<span class="operator">-</span><span class="operator">&gt;</span>globalObject();
<span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> quitFunction <span class="operator">=</span> eng<span class="operator">-</span><span class="operator">&gt;</span>newFunction(qtscript_quit);
<span class="keyword">if</span> (<span class="operator">!</span>global<span class="operator">.</span>property(QLatin1String(<span class="string">&quot;exit&quot;</span>))<span class="operator">.</span>isValid())
global<span class="operator">.</span>setProperty(QLatin1String(<span class="string">&quot;exit&quot;</span>)<span class="operator">,</span> quitFunction);
<span class="keyword">if</span> (<span class="operator">!</span>global<span class="operator">.</span>property(QLatin1String(<span class="string">&quot;quit&quot;</span>))<span class="operator">.</span>isValid())
global<span class="operator">.</span>setProperty(QLatin1String(<span class="string">&quot;quit&quot;</span>)<span class="operator">,</span> quitFunction);
wantsToQuit <span class="operator">=</span> <span class="keyword">false</span>;
<span class="type"><a href="qtextstream.html">QTextStream</a></span> qin(stdin<span class="operator">,</span> <span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadOnly);
<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>qscript_prompt <span class="operator">=</span> <span class="string">&quot;qs&gt; &quot;</span>;
<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>dot_prompt <span class="operator">=</span> <span class="string">&quot;.... &quot;</span>;
<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>prompt <span class="operator">=</span> qscript_prompt;
<span class="type"><a href="qstring.html">QString</a></span> code;
forever {
<span class="type"><a href="qstring.html">QString</a></span> line;
printf(<span class="string">&quot;%s&quot;</span><span class="operator">,</span> prompt);
fflush(stdout);
line <span class="operator">=</span> qin<span class="operator">.</span>readLine();
<span class="keyword">if</span> (line<span class="operator">.</span>isNull())
<span class="keyword">break</span>;
code <span class="operator">+</span><span class="operator">=</span> line;
code <span class="operator">+</span><span class="operator">=</span> QLatin1Char(<span class="char">'\n'</span>);
<span class="keyword">if</span> (line<span class="operator">.</span>trimmed()<span class="operator">.</span>isEmpty()) {
<span class="keyword">continue</span>;
} <span class="keyword">else</span> <span class="keyword">if</span> (<span class="operator">!</span> eng<span class="operator">-</span><span class="operator">&gt;</span>canEvaluate(code)) {
prompt <span class="operator">=</span> dot_prompt;
} <span class="keyword">else</span> {
<span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> result <span class="operator">=</span> eng<span class="operator">-</span><span class="operator">&gt;</span>evaluate(code<span class="operator">,</span> QLatin1String(<span class="string">&quot;typein&quot;</span>));
code<span class="operator">.</span>clear();
prompt <span class="operator">=</span> qscript_prompt;
<span class="keyword">if</span> (<span class="operator">!</span> result<span class="operator">.</span>isUndefined())
fprintf(stderr<span class="operator">,</span> <span class="string">&quot;%s\n&quot;</span><span class="operator">,</span> <a href="qtglobal.html#qPrintable">qPrintable</a>(result<span class="operator">.</span>toString()));
<span class="keyword">if</span> (wantsToQuit)
<span class="keyword">break</span>;
}
}
}
<span class="keyword">static</span> <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> importExtension(<span class="type"><a href="qscriptcontext.html">QScriptContext</a></span> <span class="operator">*</span>context<span class="operator">,</span> <span class="type"><a href="qscriptengine.html">QScriptEngine</a></span> <span class="operator">*</span>engine)
{
<span class="keyword">return</span> engine<span class="operator">-</span><span class="operator">&gt;</span>importExtension(context<span class="operator">-</span><span class="operator">&gt;</span>argument(<span class="number">0</span>)<span class="operator">.</span>toString());
}
<span class="keyword">static</span> <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> loadScripts(<span class="type"><a href="qscriptcontext.html">QScriptContext</a></span> <span class="operator">*</span>context<span class="operator">,</span> <span class="type"><a href="qscriptengine.html">QScriptEngine</a></span> <span class="operator">*</span>engine)
{
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> context<span class="operator">-</span><span class="operator">&gt;</span>argumentCount(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="qstring.html">QString</a></span> fileName <span class="operator">=</span> context<span class="operator">-</span><span class="operator">&gt;</span>argument(<span class="number">0</span>)<span class="operator">.</span>toString();
<span class="type"><a href="qfile.html">QFile</a></span> file(fileName);
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">.</span>open(<span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly))
<span class="keyword">return</span> context<span class="operator">-</span><span class="operator">&gt;</span>throwError(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromLatin1(<span class="string">&quot;could not open %0 for reading&quot;</span>)<span class="operator">.</span>arg(fileName));
<span class="type"><a href="qtextstream.html">QTextStream</a></span> ts(<span class="operator">&amp;</span>file);
<span class="type"><a href="qstring.html">QString</a></span> contents <span class="operator">=</span> ts<span class="operator">.</span>readAll();
file<span class="operator">.</span>close();
<span class="type"><a href="qscriptcontext.html">QScriptContext</a></span> <span class="operator">*</span>pc <span class="operator">=</span> context<span class="operator">-</span><span class="operator">&gt;</span>parentContext();
context<span class="operator">-</span><span class="operator">&gt;</span>setActivationObject(pc<span class="operator">-</span><span class="operator">&gt;</span>activationObject());
context<span class="operator">-</span><span class="operator">&gt;</span>setThisObject(pc<span class="operator">-</span><span class="operator">&gt;</span>thisObject());
<span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> ret <span class="operator">=</span> engine<span class="operator">-</span><span class="operator">&gt;</span>evaluate(contents);
<span class="keyword">if</span> (engine<span class="operator">-</span><span class="operator">&gt;</span>hasUncaughtException())
<span class="keyword">return</span> ret;
}
<span class="keyword">return</span> engine<span class="operator">-</span><span class="operator">&gt;</span>undefinedValue();
}
<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>)
{
<span class="type"><a href="qapplication.html">QApplication</a></span> <span class="operator">*</span>app;
<span class="keyword">if</span> (argc <span class="operator">&gt;</span><span class="operator">=</span> <span class="number">2</span> <span class="operator">&amp;</span><span class="operator">&amp;</span> <span class="operator">!</span>qstrcmp(argv<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">,</span> <span class="string">&quot;-tty&quot;</span>)) {
<span class="operator">+</span><span class="operator">+</span>argv;
<span class="operator">-</span><span class="operator">-</span>argc;
app <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qapplication.html">QApplication</a></span>(argc<span class="operator">,</span> argv<span class="operator">,</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>Tty);
} <span class="keyword">else</span> {
app <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qapplication.html">QApplication</a></span>(argc<span class="operator">,</span> argv);
}
<span class="type"><a href="qscriptengine.html">QScriptEngine</a></span> <span class="operator">*</span>eng <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qscriptengine.html">QScriptEngine</a></span>();
<span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> globalObject <span class="operator">=</span> eng<span class="operator">-</span><span class="operator">&gt;</span>globalObject();
globalObject<span class="operator">.</span>setProperty(<span class="string">&quot;load&quot;</span><span class="operator">,</span> eng<span class="operator">-</span><span class="operator">&gt;</span>newFunction(loadScripts<span class="operator">,</span> <span class="comment">/*length=*/</span><span class="number">1</span>));
{
<span class="keyword">if</span> (<span class="operator">!</span>globalObject<span class="operator">.</span>property(<span class="string">&quot;qt&quot;</span>)<span class="operator">.</span>isObject())
globalObject<span class="operator">.</span>setProperty(<span class="string">&quot;qt&quot;</span><span class="operator">,</span> eng<span class="operator">-</span><span class="operator">&gt;</span>newObject());
<span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> qscript <span class="operator">=</span> eng<span class="operator">-</span><span class="operator">&gt;</span>newObject();
qscript<span class="operator">.</span>setProperty(<span class="string">&quot;importExtension&quot;</span><span class="operator">,</span> eng<span class="operator">-</span><span class="operator">&gt;</span>newFunction(importExtension));
globalObject<span class="operator">.</span>property(<span class="string">&quot;qt&quot;</span>)<span class="operator">.</span>setProperty(<span class="string">&quot;script&quot;</span><span class="operator">,</span> qscript);
}
ByteArrayClass <span class="operator">*</span>byteArrayClass <span class="operator">=</span> <span class="keyword">new</span> ByteArrayClass(eng);
globalObject<span class="operator">.</span>setProperty(<span class="string">&quot;ByteArray&quot;</span><span class="operator">,</span> byteArrayClass<span class="operator">-</span><span class="operator">&gt;</span>constructor());
<span class="keyword">if</span> (<span class="operator">!</span> <span class="operator">*</span><span class="operator">+</span><span class="operator">+</span>argv) {
interactive(eng);
<span class="keyword">return</span> EXIT_SUCCESS;
}
<span class="keyword">while</span> (<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>arg <span class="operator">=</span> <span class="operator">*</span>argv<span class="operator">+</span><span class="operator">+</span>) {
<span class="type"><a href="qstring.html">QString</a></span> fn <span class="operator">=</span> <span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromLocal8Bit(arg);
<span class="keyword">if</span> (fn <span class="operator">=</span><span class="operator">=</span> QLatin1String(<span class="string">&quot;-i&quot;</span>)) {
interactive(eng);
<span class="keyword">break</span>;
}
<span class="type"><a href="qstring.html">QString</a></span> contents;
<span class="type">int</span> lineNumber <span class="operator">=</span> <span class="number">1</span>;
<span class="keyword">if</span> (fn <span class="operator">=</span><span class="operator">=</span> QLatin1String(<span class="string">&quot;-&quot;</span>)) {
<span class="type"><a href="qtextstream.html">QTextStream</a></span> stream(stdin<span class="operator">,</span> <span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadOnly);
contents <span class="operator">=</span> stream<span class="operator">.</span>readAll();
}
<span class="keyword">else</span> {
<span class="type"><a href="qfile.html">QFile</a></span> file(fn);
<span class="keyword">if</span> (file<span class="operator">.</span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadOnly)) {
<span class="type"><a href="qtextstream.html">QTextStream</a></span> stream(<span class="operator">&amp;</span>file);
contents <span class="operator">=</span> stream<span class="operator">.</span>readAll();
file<span class="operator">.</span>close();
<span class="comment">// strip off #!/usr/bin/env qscript line</span>
<span class="keyword">if</span> (contents<span class="operator">.</span>startsWith(<span class="string">&quot;#!&quot;</span>)) {
contents<span class="operator">.</span>remove(<span class="number">0</span><span class="operator">,</span> contents<span class="operator">.</span>indexOf(<span class="string">&quot;\n&quot;</span>));
<span class="operator">+</span><span class="operator">+</span>lineNumber;
}
}
}
<span class="keyword">if</span> (contents<span class="operator">.</span>isEmpty())
<span class="keyword">continue</span>;
<span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> r <span class="operator">=</span> eng<span class="operator">-</span><span class="operator">&gt;</span>evaluate(contents<span class="operator">,</span> fn<span class="operator">,</span> lineNumber);
<span class="keyword">if</span> (eng<span class="operator">-</span><span class="operator">&gt;</span>hasUncaughtException()) {
<span class="type"><a href="qstringlist.html">QStringList</a></span> backtrace <span class="operator">=</span> eng<span class="operator">-</span><span class="operator">&gt;</span>uncaughtExceptionBacktrace();
fprintf (stderr<span class="operator">,</span> <span class="string">&quot; %s\n%s\n\n&quot;</span><span class="operator">,</span> <a href="qtglobal.html#qPrintable">qPrintable</a>(r<span class="operator">.</span>toString())<span class="operator">,</span>
<a href="qtglobal.html#qPrintable">qPrintable</a>(backtrace<span class="operator">.</span>join(<span class="string">&quot;\n&quot;</span>)));
<span class="keyword">return</span> EXIT_FAILURE;
}
}
<span class="keyword">delete</span> eng;
<span class="keyword">delete</span> app;
<span class="keyword">return</span> EXIT_SUCCESS;
}</pre>
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