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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_fibonacci1_8cpp_source.html
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Tue, 30 Mar 2010 16:16:55 +0100
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/Base/IPC/Async/Fibonacci1/Fibonacci1.cpp Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/Base/IPC/Async/Fibonacci1/Fibonacci1.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
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<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
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<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
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<a name="l00004"></a>00004 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
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<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
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<a name="l00006"></a>00006 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
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<a name="l00007"></a>00007 <span class="comment">//</span>
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<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
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<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
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<a name="l00010"></a>00010 <span class="comment">//</span>
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<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
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<a name="l00012"></a>00012 <span class="comment">//</span>
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<a name="l00013"></a>00013 <span class="comment">// Description:</span>
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<a name="l00014"></a>00014 <span class="comment">// Example wraps a console in an active object.</span>
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<a name="l00015"></a>00015 <span class="comment">// Calculates Fibonacci number as chosen by the user. Note that, in this</span>
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<a name="l00016"></a>00016 <span class="comment">// example, the calculation is done as part of the console active object&#39;s </span>
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<a name="l00017"></a>00017 <span class="comment">// RunL() and can take a long time to complete. It also means that nothing</span>
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<a name="l00018"></a>00018 <span class="comment">// else can happen (including responding to keyboard events) until the </span>
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<a name="l00019"></a>00019 <span class="comment">// calculation is complete. </span>
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<a name="l00020"></a>00020 <span class="comment">//</span>
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<a name="l00021"></a>00021
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<a name="l00022"></a>00022
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<a name="l00023"></a>00023
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<a name="l00024"></a>00024 <span class="preprocessor">#include &lt;e32base.h&gt;</span>
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<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;e32cons.h&gt;</span>
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<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;e32std.h&gt;</span>
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<a name="l00027"></a>00027
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<a name="l00028"></a>00028
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<a name="l00029"></a>00029 LOCAL_D CConsoleBase* console;
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<a name="l00030"></a>00030
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<a name="l00031"></a>00031 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtMainInstructions,<span class="stringliteral">&quot;\n\nPress &#39;F&#39; to start\n      &#39;ESC&#39; to exit.\n&quot;</span>);
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<a name="l00032"></a>00032
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<a name="l00034"></a>00034 <span class="comment">//</span>
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<a name="l00035"></a>00035 <span class="comment">// -----&gt; CActiveConsole (definition)</span>
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<a name="l00036"></a>00036 <span class="comment">//</span>
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<a name="l00037"></a>00037 <span class="comment">// An abstract class which provides the facility to issue key requests. </span>
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<a name="l00038"></a>00038 <span class="comment">//</span>
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<a name="l00040"></a>00040 <span class="comment"></span>
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<a name="l00041"></a>00041 <span class="keyword">class </span>CActiveConsole : <span class="keyword">public</span> CActive
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<a name="l00042"></a>00042         {
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<a name="l00043"></a>00043 <span class="keyword">public</span>:
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<a name="l00044"></a>00044           <span class="comment">// Construction</span>
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<a name="l00045"></a>00045         CActiveConsole(CConsoleBase* aConsole);
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<a name="l00046"></a>00046         <span class="keywordtype">void</span> ConstructL();
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<a name="l00047"></a>00047
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<a name="l00048"></a>00048           <span class="comment">// Destruction</span>
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<a name="l00049"></a>00049         ~CActiveConsole();
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<a name="l00050"></a>00050
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<a name="l00051"></a>00051           <span class="comment">// Issue request</span>
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<a name="l00052"></a>00052         <span class="keywordtype">void</span> RequestCharacter();
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<a name="l00053"></a>00053
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<a name="l00054"></a>00054           <span class="comment">// Cancel request.</span>
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<a name="l00055"></a>00055           <span class="comment">// Defined as pure virtual by CActive;</span>
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<a name="l00056"></a>00056           <span class="comment">// implementation provided by this class.</span>
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<a name="l00057"></a>00057         <span class="keywordtype">void</span> DoCancel();
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<a name="l00058"></a>00058
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<a name="l00059"></a>00059           <span class="comment">// Service completed request.</span>
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<a name="l00060"></a>00060           <span class="comment">// Defined as pure virtual by CActive;</span>
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<a name="l00061"></a>00061           <span class="comment">// implementation provided by this class,</span>
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<a name="l00062"></a>00062         <span class="keywordtype">void</span> RunL();
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<a name="l00063"></a>00063
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<a name="l00064"></a>00064           <span class="comment">// Called from RunL() - an implementation must be provided</span>
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<a name="l00065"></a>00065           <span class="comment">// by derived classes to handle the completed request</span>
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<a name="l00066"></a>00066         <span class="keyword">virtual</span> <span class="keywordtype">void</span> ProcessKeyPress(TChar aChar) = 0;
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<a name="l00067"></a>00067
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<a name="l00068"></a>00068 <span class="keyword">protected</span>:
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<a name="l00069"></a>00069           <span class="comment">// Data members defined by this class</span>
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<a name="l00070"></a>00070         CConsoleBase* iConsole; <span class="comment">// A console for reading from</span>
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<a name="l00071"></a>00071         };
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<a name="l00072"></a>00072
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<a name="l00073"></a>00073
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<a name="l00075"></a>00075 <span class="comment">//</span>
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<a name="l00076"></a>00076 <span class="comment">// -----&gt; CExampleScheduler (definition)</span>
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<a name="l00077"></a>00077 <span class="comment">//</span>
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<a name="l00079"></a>00079 <span class="comment"></span>
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<a name="l00080"></a>00080 <span class="keyword">class </span>CExampleScheduler : <span class="keyword">public</span> CActiveScheduler
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<a name="l00081"></a>00081         {
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<a name="l00082"></a>00082 <span class="keyword">public</span>:
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<a name="l00083"></a>00083         <span class="keywordtype">void</span> Error (TInt aError) <span class="keyword">const</span>;
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<a name="l00084"></a>00084         <span class="keywordtype">void</span> WaitForAnyRequest();
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<a name="l00085"></a>00085         <span class="keywordtype">void</span> SetActiveObject(CActiveConsole* aActiveConsole);
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<a name="l00086"></a>00086 <span class="keyword">private</span>:
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<a name="l00087"></a>00087           <span class="comment">// data members defined for this class</span>
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<a name="l00088"></a>00088         CActiveConsole* iActiveConsole;
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<a name="l00089"></a>00089         };
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<a name="l00090"></a>00090
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<a name="l00091"></a>00091
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<a name="l00093"></a>00093 <span class="comment">//</span>
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<a name="l00094"></a>00094 <span class="comment">// -----&gt; TFibonacciEngine (definition)</span>
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<a name="l00095"></a>00095 <span class="comment">//</span>
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<a name="l00096"></a>00096 <span class="comment">// This class provides the fibonacci calculation engine</span>
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<a name="l00097"></a>00097 <span class="comment">//</span>
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<a name="l00099"></a>00099 <span class="comment"></span>
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<a name="l00100"></a>00100 <span class="keyword">class </span>TFibonacciEngine
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<a name="l00101"></a>00101         {
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<a name="l00102"></a>00102 <span class="keyword">public</span>:
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<a name="l00103"></a>00103         <span class="keywordtype">void</span> Calculate (TInt aTerms) ;
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<a name="l00104"></a>00104
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<a name="l00105"></a>00105         TInt iResult ;
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<a name="l00106"></a>00106         } ;
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   111
 
<a name="l00107"></a>00107
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   112
 
<a name="l00108"></a>00108
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   113
 
<a name="l00110"></a>00110 <span class="comment">//</span>
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<a name="l00111"></a>00111 <span class="comment">// -----&gt; CFibonacciApplication (definition)</span>
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<a name="l00112"></a>00112 <span class="comment">//</span>
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<a name="l00113"></a>00113 <span class="comment">// This class encapsulates the fibonacci calculation engine</span>
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   117
 
<a name="l00114"></a>00114 <span class="comment">//</span>
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<a name="l00116"></a>00116 <span class="comment"></span>
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<a name="l00117"></a>00117 <span class="keyword">class </span>CFibonacciApplication : <span class="keyword">public</span> CActiveConsole
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<a name="l00118"></a>00118         {
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<a name="l00119"></a>00119 <span class="keyword">public</span>:
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<a name="l00120"></a>00120         CFibonacciApplication(CConsoleBase* aConsole) ;
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<a name="l00121"></a>00121         <span class="keywordtype">void</span> ConstructL();
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<a name="l00122"></a>00122
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<a name="l00123"></a>00123           <span class="comment">// Static construction</span>
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<a name="l00124"></a>00124         <span class="keyword">static</span> CFibonacciApplication* NewLC(CConsoleBase* aConsole) ;
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<a name="l00125"></a>00125
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<a name="l00126"></a>00126           <span class="comment">// service request</span>
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<a name="l00127"></a>00127         <span class="keywordtype">void</span> ProcessKeyPress(TChar aChar) ;
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<a name="l00128"></a>00128
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<a name="l00129"></a>00129 <span class="keyword">private</span>:
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<a name="l00130"></a>00130         CConsoleBase* iConsole ;
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<a name="l00131"></a>00131         TFibonacciEngine iFibonacciEngine ;
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<a name="l00132"></a>00132         };
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<a name="l00133"></a>00133
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<a name="l00134"></a>00134
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<a name="l00136"></a>00136 <span class="comment">//</span>
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<a name="l00137"></a>00137 <span class="comment">// -----&gt; CActiveConsole (implementation)</span>
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<a name="l00138"></a>00138 <span class="comment">//</span>
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<a name="l00140"></a>00140 <span class="comment"></span>
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<a name="l00141"></a>00141 CActiveConsole::CActiveConsole( CConsoleBase* aConsole)
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<a name="l00142"></a>00142         : CActive(CActive::EPriorityUserInput)
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<a name="l00143"></a>00143           <span class="comment">// Construct high-priority active object</span>
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<a name="l00144"></a>00144         {
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<a name="l00145"></a>00145         iConsole = aConsole;
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<a name="l00146"></a>00146         __DECLARE_NAME(_S(<span class="stringliteral">&quot;CActiveConsole&quot;</span>));
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<a name="l00147"></a>00147
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<a name="l00148"></a>00148         }
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<a name="l00149"></a>00149
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<a name="l00150"></a>00150 <span class="keywordtype">void</span> CActiveConsole::ConstructL()
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<a name="l00151"></a>00151         {
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<a name="l00152"></a>00152           <span class="comment">// Add to active scheduler</span>
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<a name="l00153"></a>00153         CActiveScheduler::Add(<span class="keyword">this</span>);
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<a name="l00154"></a>00154         }
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<a name="l00155"></a>00155
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<a name="l00156"></a>00156 CActiveConsole::~CActiveConsole()
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<a name="l00157"></a>00157         {
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<a name="l00158"></a>00158         <span class="comment">// Make sure we&#39;re cancelled</span>
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<a name="l00159"></a>00159         Cancel();
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<a name="l00160"></a>00160         }
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<a name="l00161"></a>00161
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<a name="l00162"></a>00162 <span class="keywordtype">void</span>  CActiveConsole::DoCancel()
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<a name="l00163"></a>00163         {
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<a name="l00164"></a>00164         iConsole-&gt;ReadCancel();
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<a name="l00165"></a>00165         }
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<a name="l00166"></a>00166
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<a name="l00167"></a>00167 <span class="keywordtype">void</span>  CActiveConsole::RunL()
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<a name="l00168"></a>00168         {
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<a name="l00169"></a>00169           <span class="comment">// Handle completed request</span>
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<a name="l00170"></a>00170         ProcessKeyPress(TChar(iConsole-&gt;KeyCode()));
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<a name="l00171"></a>00171         }
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<a name="l00172"></a>00172
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<a name="l00173"></a>00173 <span class="keywordtype">void</span> CActiveConsole::RequestCharacter()
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<a name="l00174"></a>00174         {
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<a name="l00175"></a>00175           <span class="comment">// A request is issued to the CConsoleBase to accept a</span>
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<a name="l00176"></a>00176           <span class="comment">// character from the keyboard.</span>
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<a name="l00177"></a>00177         iConsole-&gt;Read(iStatus);
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<a name="l00178"></a>00178         SetActive();
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<a name="l00179"></a>00179         }
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<a name="l00180"></a>00180
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<a name="l00181"></a>00181
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<a name="l00183"></a>00183 <span class="comment">//</span>
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<a name="l00184"></a>00184 <span class="comment">// -----&gt; CExampleScheduler (implementation)</span>
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<a name="l00185"></a>00185 <span class="comment">//</span>
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<a name="l00187"></a>00187 <span class="comment"></span>
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<a name="l00188"></a>00188 <span class="keywordtype">void</span> CExampleScheduler::Error(TInt aError)<span class="keyword"> const</span>
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<a name="l00189"></a>00189 <span class="keyword">        </span>{
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<a name="l00190"></a>00190         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSchedulerError,<span class="stringliteral">&quot;CExampleScheduler - error&quot;</span>);
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<a name="l00191"></a>00191         User::Panic(KTxtSchedulerError,aError);
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<a name="l00192"></a>00192         }
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<a name="l00193"></a>00193
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<a name="l00194"></a>00194 <span class="keywordtype">void</span> CExampleScheduler::WaitForAnyRequest()
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<a name="l00195"></a>00195         {
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<a name="l00196"></a>00196         <span class="keywordflow">if</span> (!(iActiveConsole-&gt;IsActive()))
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<a name="l00197"></a>00197                 iActiveConsole-&gt;RequestCharacter();
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   196
 
<a name="l00198"></a>00198         CActiveScheduler::WaitForAnyRequest();
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<a name="l00199"></a>00199         }
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   198
 
<a name="l00200"></a>00200
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<a name="l00201"></a>00201 <span class="keywordtype">void</span> CExampleScheduler::SetActiveObject(CActiveConsole* aActiveConsole)
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<a name="l00202"></a>00202         {
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<a name="l00203"></a>00203         iActiveConsole = aActiveConsole;
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<a name="l00204"></a>00204         }
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   203
 
<a name="l00205"></a>00205
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<a name="l00206"></a>00206
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<a name="l00208"></a>00208 <span class="comment">// CFibonacciApplication support routine</span>
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<a name="l00209"></a>00209 <span class="comment">//   uses up arrow &amp; down arrow to change number, Enter to select</span>
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<a name="l00211"></a>00211 <span class="comment"></span>
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<a name="l00212"></a>00212 TInt GetValueFromKeyboard (TInt aInitial, TInt aStep, TInt lowerLimit, TInt upperLimit, <span class="keyword">const</span> TDesC&amp; aPrompt, CConsoleBase* aConsole)
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<a name="l00213"></a>00213         {
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<a name="l00214"></a>00214         TChar input ;
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<a name="l00215"></a>00215         TInt value = aInitial ;
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<a name="l00216"></a>00216
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<a name="l00217"></a>00217         aConsole-&gt;Printf(aPrompt) ;
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<a name="l00218"></a>00218         <span class="keywordflow">do</span>
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<a name="l00219"></a>00219                 {
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<a name="l00220"></a>00220                 aConsole-&gt;SetPos(0);
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<a name="l00221"></a>00221                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat1,<span class="stringliteral">&quot;%d  &quot;</span>);
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<a name="l00222"></a>00222                 aConsole-&gt;Printf(KFormat1, value);
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<a name="l00223"></a>00223                 input = aConsole-&gt;Getch() ;
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<a name="l00224"></a>00224                 <span class="keywordflow">if</span> (input == EKeyUpArrow &amp;&amp; value &lt; upperLimit) value = value + aStep ;
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<a name="l00225"></a>00225                 <span class="keywordflow">if</span> (input == EKeyDownArrow &amp;&amp; value &gt; lowerLimit) value = value - aStep ;
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<a name="l00226"></a>00226                 <span class="keywordflow">if</span> (input == <span class="charliteral">&#39;c&#39;</span>) value = -1;
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<a name="l00227"></a>00227                 }
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<a name="l00228"></a>00228         <span class="keywordflow">while</span> (input != EKeyEnter &amp;&amp; input != <span class="charliteral">&#39;c&#39;</span>) ;
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<a name="l00229"></a>00229
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<a name="l00230"></a>00230         <span class="keywordflow">return</span> value ;
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<a name="l00231"></a>00231         }
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<a name="l00232"></a>00232
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<a name="l00233"></a>00233
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<a name="l00235"></a>00235 <span class="comment">//</span>
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<a name="l00236"></a>00236 <span class="comment">// -----&gt; CFibonacciApplication (implementation)</span>
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<a name="l00237"></a>00237 <span class="comment">//</span>
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<a name="l00239"></a>00239 <span class="comment"></span>
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<a name="l00240"></a>00240 CFibonacciApplication::CFibonacciApplication(CConsoleBase* aConsole )
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<a name="l00241"></a>00241         : CActiveConsole(aConsole)
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<a name="l00242"></a>00242           <span class="comment">// construct zero-priority active object</span>
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<a name="l00243"></a>00243         {
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<a name="l00244"></a>00244         iConsole = aConsole ;
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<a name="l00245"></a>00245         __DECLARE_NAME(_S(<span class="stringliteral">&quot;CFibonacciApplication&quot;</span>));
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<a name="l00246"></a>00246         }
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<a name="l00247"></a>00247
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<a name="l00248"></a>00248
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<a name="l00249"></a>00249 CFibonacciApplication* CFibonacciApplication::NewLC(CConsoleBase* aConsole )
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<a name="l00250"></a>00250         {
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<a name="l00251"></a>00251         CFibonacciApplication* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CFibonacciApplication(aConsole);
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<a name="l00252"></a>00252         CleanupStack::PushL(<span class="keyword">self</span>);
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<a name="l00253"></a>00253         <span class="keyword">self</span>-&gt;ConstructL();
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<a name="l00254"></a>00254         <span class="keywordflow">return</span> <span class="keyword">self</span>;
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<a name="l00255"></a>00255         }
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<a name="l00256"></a>00256
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<a name="l00257"></a>00257
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<a name="l00258"></a>00258 <span class="keywordtype">void</span> CFibonacciApplication::ConstructL()
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<a name="l00259"></a>00259         {
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<a name="l00260"></a>00260           <span class="comment">// Add to active scheduler</span>
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<a name="l00261"></a>00261         CActiveScheduler::Add(<span class="keyword">this</span>);
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<a name="l00262"></a>00262           <span class="comment">// Make this the active object</span>
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<a name="l00263"></a>00263         ((CExampleScheduler*)(CActiveScheduler::Current()))-&gt;SetActiveObject(<span class="keyword">this</span>);
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<a name="l00264"></a>00264         }
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<a name="l00265"></a>00265
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<a name="l00266"></a>00266
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<a name="l00267"></a>00267 <span class="keywordtype">void</span> CFibonacciApplication::ProcessKeyPress(TChar aChar)
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<a name="l00268"></a>00268         {
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<a name="l00269"></a>00269           <span class="comment">// if key is ESC </span>
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<a name="l00270"></a>00270           <span class="comment">//   cancel any outstanding request</span>
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<a name="l00271"></a>00271           <span class="comment">//   stop the scheduler</span>
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<a name="l00272"></a>00272         <span class="keywordflow">if</span> (aChar == EKeyEscape)
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<a name="l00273"></a>00273                 {
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<a name="l00274"></a>00274                 CActiveScheduler::Stop();
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<a name="l00275"></a>00275                 <span class="keywordflow">return</span>;
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<a name="l00276"></a>00276                 }
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<a name="l00277"></a>00277
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<a name="l00278"></a>00278           <span class="comment">// If key is &quot;f&quot; or &quot;F&quot;</span>
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<a name="l00279"></a>00279           <span class="comment">//   cancel any outstanding request</span>
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<a name="l00280"></a>00280           <span class="comment">//   issue a fibonacci request.</span>
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<a name="l00281"></a>00281         <span class="keywordflow">if</span> (aChar == <span class="charliteral">&#39;f&#39;</span> || aChar == <span class="charliteral">&#39;F&#39;</span>)
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<a name="l00282"></a>00282                 {
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<a name="l00283"></a>00283                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtStartingFibonacci,<span class="stringliteral">&quot;\nStarting Fibonacci....  \n&quot;</span>);
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<a name="l00284"></a>00284                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtReturnTermNumber,<span class="stringliteral">&quot;\nENTER selects number, and starts calculation\nUP    arrow increases num\nDOWN  arrow decreases num\nC     cancels\n\n&quot;</span>);
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<a name="l00285"></a>00285                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCalculating,<span class="stringliteral">&quot;\nCalculating...\n&quot;</span>);
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<a name="l00286"></a>00286                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat2,<span class="stringliteral">&quot;\nResult : %u \n&quot;</span>);
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<a name="l00287"></a>00287                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtCancelled,<span class="stringliteral">&quot;Cancelled&quot;</span>);
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<a name="l00288"></a>00288
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<a name="l00289"></a>00289                 iConsole-&gt;Printf(KTxtStartingFibonacci);
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<a name="l00290"></a>00290
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<a name="l00291"></a>00291                 TInt iterations = GetValueFromKeyboard(5,1,2,46, KTxtReturnTermNumber, iConsole) ;
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<a name="l00292"></a>00292                 <span class="keywordflow">if</span> (iterations == -1)  <span class="comment">// convenient if awkward but allows us to indicate a request to cancel.</span>
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<a name="l00293"></a>00293                         {
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<a name="l00294"></a>00294                         iConsole-&gt;Printf(KTxtCancelled);
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<a name="l00295"></a>00295                         iConsole-&gt;Printf(KTxtMainInstructions);
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<a name="l00296"></a>00296                         <span class="keywordflow">return</span>;
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<a name="l00297"></a>00297                         }
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<a name="l00298"></a>00298
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<a name="l00299"></a>00299                 iConsole-&gt;Printf(KTxtCalculating);
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<a name="l00300"></a>00300                 iFibonacciEngine.Calculate(iterations);
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<a name="l00301"></a>00301
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<a name="l00302"></a>00302                 iConsole-&gt;Printf(KFormat2, iFibonacciEngine.iResult) ;
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<a name="l00303"></a>00303                 iConsole-&gt;Printf(KTxtMainInstructions);
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<a name="l00304"></a>00304                 <span class="keywordflow">return</span>;
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<a name="l00305"></a>00305                 }
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<a name="l00306"></a>00306
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<a name="l00307"></a>00307        <span class="comment">// any other key ignore</span>
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<a name="l00308"></a>00308         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtNotRecognised,<span class="stringliteral">&quot;\nUnwanted key pressed&quot;</span>);
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<a name="l00309"></a>00309         iConsole-&gt;Printf(KTxtNotRecognised);
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<a name="l00310"></a>00310         iConsole-&gt;Printf(KTxtMainInstructions);
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<a name="l00311"></a>00311         }
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<a name="l00312"></a>00312
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<a name="l00314"></a>00314 <span class="comment">//</span>
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<a name="l00315"></a>00315 <span class="comment">// -----&gt; TFibonacciEngine (implementation)</span>
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<a name="l00316"></a>00316 <span class="comment">//</span>
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<a name="l00318"></a>00318 <span class="comment"></span>
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<a name="l00319"></a>00319 <span class="keywordtype">void</span> TFibonacciEngine::Calculate (TInt aTerms)
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<a name="l00320"></a>00320         {
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<a name="l00321"></a>00321         TInt iterations = aTerms ;
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<a name="l00322"></a>00322
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<a name="l00323"></a>00323         TInt currentTotal = 1 ;
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<a name="l00324"></a>00324         TInt previousTotal = 0 ;
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<a name="l00325"></a>00325         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtTooManyIterations,<span class="stringliteral">&quot;Too many iterations&quot;</span>);
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<a name="l00326"></a>00326         __ASSERT_ALWAYS(iterations&lt;47,User::Panic(KTxtTooManyIterations,iterations));
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<a name="l00327"></a>00327
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   320
 
<a name="l00328"></a>00328         <span class="comment">// if limit not yet reached</span>
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diff changeset 
   321
 
<a name="l00329"></a>00329         <span class="keywordflow">while</span> (iterations-- &gt; 0)
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<a name="l00330"></a>00330                 {
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   323
 
<a name="l00331"></a>00331                 <span class="comment">// calculate next number in series</span>
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   324
 
<a name="l00332"></a>00332                 TInt newTotal = currentTotal + previousTotal ;
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diff changeset 
   325
 
<a name="l00333"></a>00333
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   326
 
<a name="l00334"></a>00334                 <span class="comment">// update variables</span>
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   327
 
<a name="l00335"></a>00335                 previousTotal = currentTotal ;
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   328
 
<a name="l00336"></a>00336                 currentTotal = newTotal ;
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diff changeset 
   329
 
<a name="l00337"></a>00337
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   330
 
<a name="l00338"></a>00338                 <span class="comment">// introduce a delay</span>
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   331
 
<a name="l00339"></a>00339                 User::After(1000000) ;
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<a name="l00340"></a>00340                 }
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diff changeset 
   333
 
<a name="l00341"></a>00341
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   334
 
<a name="l00342"></a>00342         iResult = currentTotal ;
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diff changeset 
   335
 
<a name="l00343"></a>00343
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   336
 
<a name="l00344"></a>00344         }
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diff changeset 
   337
 
<a name="l00345"></a>00345
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<a name="l00346"></a>00346
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   339
 
<a name="l00348"></a>00348 <span class="comment">// This section deals with initialisation and ensuring we have a console active</span>
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   340
 
<a name="l00350"></a>00350 <span class="comment"></span>
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   341
 
<a name="l00351"></a>00351 <span class="keywordtype">void</span> doExampleL () ;
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   342
 
<a name="l00352"></a>00352
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   343
 
<a name="l00353"></a>00353 <span class="keywordtype">void</span> SetupConsoleL();
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   344
 
<a name="l00354"></a>00354
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   345
 
<a name="l00355"></a>00355 GLDEF_C TInt E32Main()                          <span class="comment">// main function called by E32</span>
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   346
 
<a name="l00356"></a>00356     {
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   347
 
<a name="l00357"></a>00357         CTrapCleanup* cleanup=CTrapCleanup::New();              <span class="comment">// get clean-up stack</span>
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   348
 
<a name="l00358"></a>00358         TRAPD(error,SetupConsoleL());                                   <span class="comment">// more initialization, then do example</span>
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   349
 
<a name="l00359"></a>00359         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFibonacciExampleError,<span class="stringliteral">&quot;Fibonacci example error&quot;</span>);
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   350
 
<a name="l00360"></a>00360         __ASSERT_ALWAYS(!error,User::Panic(KTxtFibonacciExampleError,error));
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   351
 
<a name="l00361"></a>00361         <span class="keyword">delete</span> cleanup;                                                                 <span class="comment">// destroy clean-up stack</span>
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   352
 
<a name="l00362"></a>00362         <span class="keywordflow">return</span> 0;                                                                               <span class="comment">// and return</span>
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<a name="l00363"></a>00363     }
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diff changeset 
   354
 
<a name="l00364"></a>00364
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diff changeset 
   355
 
<a name="l00365"></a>00365 <span class="keywordtype">void</span> SetupConsoleL()                             <span class="comment">// initialize and call example code under cleanup stack</span>
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diff changeset 
   356
 
<a name="l00366"></a>00366     {
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   357
 
<a name="l00367"></a>00367         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFibSingActObj,<span class="stringliteral">&quot;Single Active Object&quot;</span>);
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   358
 
<a name="l00368"></a>00368         console=Console::NewL(KTxtFibSingActObj, TSize(KConsFullScreen,KConsFullScreen));
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   359
 
<a name="l00369"></a>00369         CleanupStack::PushL(console);
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diff changeset 
   360
 
<a name="l00370"></a>00370
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diff changeset 
   361
 
<a name="l00371"></a>00371         console-&gt;Printf(KTxtMainInstructions) ;
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diff changeset 
   362
 
<a name="l00372"></a>00372         TRAPD(error, doExampleL());                                         <span class="comment">// perform example function</span>
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   363
 
<a name="l00373"></a>00373         <span class="keywordflow">if</span> (error)
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diff changeset 
   364
 
<a name="l00374"></a>00374                 {
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diff changeset 
   365
 
<a name="l00375"></a>00375                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormat3,<span class="stringliteral">&quot;failed: leave code=%d&quot;</span>);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   366
 
<a name="l00376"></a>00376                 console-&gt;Printf(KFormat3, error);
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diff changeset 
   367
 
<a name="l00377"></a>00377                 }
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diff changeset 
   368
 
<a name="l00378"></a>00378         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPressAnyKey,<span class="stringliteral">&quot;[Press any key to exit]&quot;</span>);
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   369
 
<a name="l00379"></a>00379         console-&gt;Printf(KTxtPressAnyKey);
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diff changeset 
   370
 
<a name="l00380"></a>00380         console-&gt;Getch();                                                               <span class="comment">// get and ignore character</span>
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   371
 
<a name="l00381"></a>00381         CleanupStack::PopAndDestroy();                                  <span class="comment">// close console</span>
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<a name="l00382"></a>00382     }
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diff changeset 
   373
 
<a name="l00383"></a>00383
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diff changeset 
   374
 
<a name="l00384"></a>00384
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diff changeset 
   375
 
<a name="l00386"></a>00386 <span class="comment">//</span>
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   376
 
<a name="l00387"></a>00387 <span class="comment">// Do the example</span>
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diff changeset 
   377
 
<a name="l00388"></a>00388 <span class="comment">//</span>
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   378
 
<a name="l00390"></a>00390 <span class="comment"></span><span class="keywordtype">void</span> doExampleL()
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   379
 
<a name="l00391"></a>00391     {
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diff changeset 
   380
 
<a name="l00392"></a>00392           <span class="comment">// Construct and install the active scheduler</span>
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   381
 
<a name="l00393"></a>00393         CExampleScheduler*  exampleScheduler = <span class="keyword">new</span> (ELeave) CExampleScheduler;
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diff changeset 
   382
 
<a name="l00394"></a>00394
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diff changeset 
   383
 
<a name="l00395"></a>00395           <span class="comment">// Push onto the cleanup stack</span>
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diff changeset 
   384
 
<a name="l00396"></a>00396         CleanupStack::PushL(exampleScheduler);
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diff changeset 
   385
 
<a name="l00397"></a>00397
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   386
 
<a name="l00398"></a>00398           <span class="comment">// Install as the active scheduler</span>
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diff changeset 
   387
 
<a name="l00399"></a>00399         CActiveScheduler::Install(exampleScheduler);
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diff changeset 
   388
 
<a name="l00400"></a>00400
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diff changeset 
   389
 
<a name="l00401"></a>00401           <span class="comment">// Create CFibonacciApplication active object.</span>
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diff changeset 
   390
 
<a name="l00402"></a>00402         CFibonacciApplication* fibonacci = CFibonacciApplication::NewLC(console);
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diff changeset 
   391
 
<a name="l00403"></a>00403
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diff changeset 
   392
 
<a name="l00404"></a>00404           <span class="comment">// issue initial request</span>
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   393
 
<a name="l00405"></a>00405         fibonacci-&gt;RequestCharacter() ;
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diff changeset 
   394
 
<a name="l00406"></a>00406
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diff changeset 
   395
 
<a name="l00407"></a>00407         <span class="comment">// Main part of the program:</span>
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diff changeset 
   396
 
<a name="l00408"></a>00408         <span class="comment">//    wait loop that cycles until ActiveScheduler::Stop called</span>
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diff changeset 
   397
 
<a name="l00409"></a>00409         CActiveScheduler::Start();
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diff changeset 
   398
 
<a name="l00410"></a>00410
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diff changeset 
   399
 
<a name="l00411"></a>00411         <span class="comment">// Remove from the cleanup stack and destroy:</span>
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diff changeset 
   400
 
<a name="l00412"></a>00412         <span class="comment">// 1. the CFibonacciApplication active object.</span>
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diff changeset 
   401
 
<a name="l00413"></a>00413         <span class="comment">// 2. exampleScheduler</span>
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diff changeset 
   402
 
<a name="l00414"></a>00414         CleanupStack::PopAndDestroy();
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diff changeset 
   403
 
<a name="l00415"></a>00415         CleanupStack::PopAndDestroy();
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diff changeset 
   404
 
<a name="l00416"></a>00416         }
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parents:
diff changeset 
   405
 
<a name="l00417"></a>00417
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diff changeset 
   406
 
</pre></div></div>
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   407
 
<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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diff changeset 
   408
 
<a href="http://www.doxygen.org/index.html">
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diff changeset 
   409
 
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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diff changeset 
   410
 
</body>
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   411
 
</html>
FCL/sftools/depl/docscontent