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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_c_inverter_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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/MessageQueueExample/Inverter/src/CInverter.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/MessageQueueExample/Inverter/src/CInverter.cpp</h1><a href="_c_inverter_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2008-2009 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">// The following class describes the Inverter class which recieves input </span>
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<a name="l00015"></a>00015 <span class="comment">// through InverterInq and sends it to InverterOutQ after inverting the recieved words.</span>
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<a name="l00016"></a>00016 <span class="comment">// It implements a periodic timer which opens the InverterInq every 10 seconds.</span>
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<a name="l00017"></a>00017 <span class="comment">//</span>
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<a name="l00018"></a>00018
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<a name="l00019"></a>00019
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<a name="l00020"></a>00020
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<a name="l00025"></a>00025 <span class="preprocessor">#include &quot;CInverter.h&quot;</span>
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<a name="l00026"></a>00026 <span class="preprocessor">#include &quot;e32keys.h&quot;</span>     <span class="comment">// for EKeyEscape.</span>
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<a name="l00027"></a>00027
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<a name="l00028"></a>00028 <span class="comment">//Periodic timer interval of 10 seconds.</span>
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<a name="l00029"></a>00029 <span class="keyword">const</span> TInt KPeriodicTimerInterval10Sec(10000000);
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<a name="l00030"></a>00030
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<a name="l00031"></a>00031 <span class="comment">//Error code to indicate Stop command.</span>
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<a name="l00032"></a>00032 <span class="keyword">const</span> TInt KErrStop = -100;
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<a name="l00033"></a>00033
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<a name="l00037"></a><a class="code" href="class_c_inverter.html#a6a742db9903aabd02203d158e5905135">00037</a> <a class="code" href="class_c_inverter.html#a6a742db9903aabd02203d158e5905135">CInverter::~CInverter</a>()
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<a name="l00038"></a>00038         {
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<a name="l00039"></a>00039     <span class="keywordflow">if</span>(iTimer)
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<a name="l00040"></a>00040         {
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<a name="l00041"></a>00041         <span class="comment">// Calling Cancel without checking if the timer is active is safe</span>
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<a name="l00042"></a>00042         iTimer-&gt;Cancel();
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<a name="l00043"></a>00043         }
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<a name="l00044"></a>00044     <span class="keyword">delete</span> iTimer;
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<a name="l00045"></a>00045         iInMsgQ.Close();
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<a name="l00046"></a>00046         iOutMsgQ.Close();
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<a name="l00047"></a>00047         }
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<a name="l00048"></a>00048
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<a name="l00049"></a>00049 <a class="code" href="class_c_inverter.html">CInverter</a>* CInverter::NewL()
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<a name="l00050"></a>00050         {
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<a name="l00051"></a>00051         <a class="code" href="class_c_inverter.html">CInverter</a>* <span class="keyword">self</span>=<span class="keyword">new</span>(ELeave)<a class="code" href="class_c_inverter.html">CInverter</a>();
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<a name="l00052"></a>00052         CleanupStack::PushL(<span class="keyword">self</span>);
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<a name="l00053"></a>00053         <span class="keyword">self</span>-&gt;ConstructL();
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<a name="l00054"></a>00054         CleanupStack::Pop(<span class="keyword">self</span>);
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<a name="l00055"></a>00055         <span class="keywordflow">return</span> <span class="keyword">self</span>;
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<a name="l00056"></a>00056         }
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<a name="l00060"></a><a class="code" href="class_c_inverter.html#a79ad184aaf5ee5bf48a8bb724a188614">00060</a> <span class="keywordtype">void</span> <a class="code" href="class_c_inverter.html#a79ad184aaf5ee5bf48a8bb724a188614">CInverter::ConstructL</a>()
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<a name="l00061"></a>00061     {
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<a name="l00062"></a>00062     <span class="comment">// Initialize the periodic timer.</span>
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<a name="l00063"></a>00063     iTimer = CPeriodic::NewL(CActive::EPriorityIdle);
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<a name="l00064"></a>00064     <span class="comment">// Start the periodic timer, when ever the time elapsed</span>
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<a name="l00065"></a>00065     <span class="comment">// the StaticWake() will get called.</span>
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<a name="l00066"></a>00066
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<a name="l00067"></a>00067     iTimer-&gt;Start(KPeriodicTimerInterval10Sec, KPeriodicTimerInterval10Sec,TCallBack(<a class="code" href="class_c_inverter.html#a5eaf28a9caffc96fa285871dd1b52f97">StaticWake</a>, <span class="keyword">this</span>));
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<a name="l00068"></a>00068
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<a name="l00069"></a>00069     }
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<a name="l00070"></a>00070
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<a name="l00075"></a><a class="code" href="class_c_inverter.html#a5eaf28a9caffc96fa285871dd1b52f97">00075</a> TInt <a class="code" href="class_c_inverter.html#a5eaf28a9caffc96fa285871dd1b52f97">CInverter::StaticWake</a>(TAny* aAny)
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<a name="l00076"></a>00076         {
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<a name="l00077"></a>00077         <a class="code" href="class_c_inverter.html">CInverter</a>* <span class="keyword">self</span> = <span class="keyword">static_cast&lt;</span><a class="code" href="class_c_inverter.html">CInverter</a>*<span class="keyword">&gt;</span>( aAny );
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<a name="l00078"></a>00078         TInt ret = <span class="keyword">self</span>-&gt;RecieveMsg();
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<a name="l00079"></a>00079         <span class="keywordflow">if</span>(ret!= KErrStop) <span class="comment">//KErrStop indicates that system has to be stopped and no more messages to be sent.</span>
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<a name="l00080"></a>00080         <span class="keyword">self</span>-&gt;SendMsg();
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<a name="l00081"></a>00081         <span class="keywordflow">return</span> KErrNone; <span class="comment">// Return value ignored by CPeriodic</span>
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<a name="l00082"></a>00082         }
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<a name="l00083"></a>00083
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<a name="l00090"></a><a class="code" href="class_c_inverter.html#a04f57f2574053f65550decfa5f5b0a81">00090</a> TInt <a class="code" href="class_c_inverter.html#a04f57f2574053f65550decfa5f5b0a81">CInverter::RecieveMsg</a>()
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<a name="l00091"></a>00091     {
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<a name="l00092"></a>00092
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<a name="l00093"></a>00093     <span class="comment">//Opens the message queue input to the inverter.</span>
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<a name="l00094"></a>00094     <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KGlobalInverterInQ, <span class="stringliteral">&quot;InverterInQ&quot;</span>);
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<a name="l00095"></a>00095     TInt ret = iInMsgQ.OpenGlobal(KGlobalInverterInQ);
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<a name="l00096"></a>00096
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<a name="l00097"></a>00097         <span class="keywordflow">if</span> (ret == KErrNone)
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<a name="l00098"></a>00098         {
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<a name="l00099"></a>00099         <span class="comment">//Recieve the message coming from the first process.</span>
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<a name="l00100"></a>00100         iMsgQData.Zero();
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<a name="l00101"></a>00101         iInMsgQ.ReceiveBlocking(iMsgQData);
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<a name="l00102"></a>00102
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<a name="l00103"></a>00103         <span class="comment">//If the recieved data indicates stop command, stop the system.</span>
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<a name="l00104"></a>00104         <span class="keywordflow">if</span>(iMsgQData[0]==EKeyEscape)
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<a name="l00105"></a>00105                         {
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<a name="l00106"></a>00106                         this-&gt;<a class="code" href="class_c_inverter.html#a5b46657c2749a4a0b364e5fb54a272de">Stop</a>();
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<a name="l00107"></a>00107                         <span class="keywordflow">return</span> KErrStop;
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<a name="l00108"></a>00108                         }
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<a name="l00109"></a>00109         }
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<a name="l00110"></a>00110         <span class="keywordflow">return</span> KErrNone;
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<a name="l00111"></a>00111     }
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<a name="l00112"></a>00112
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<a name="l00116"></a><a class="code" href="class_c_inverter.html#afa8f1fa7a66c8f8aa461f84316fe4a0e">00116</a> <span class="keywordtype">void</span> <a class="code" href="class_c_inverter.html#afa8f1fa7a66c8f8aa461f84316fe4a0e">CInverter::SendMsg</a>()
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<a name="l00117"></a>00117         {
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<a name="l00118"></a>00118         <span class="comment">//Opens the global message Queue named InverterOutQ.</span>
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<a name="l00119"></a>00119         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KGlobalInverterOutQ, <span class="stringliteral">&quot;InverterOutQ&quot;</span>);
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<a name="l00120"></a>00120         TInt ret = iOutMsgQ.OpenGlobal(KGlobalInverterOutQ);
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<a name="l00121"></a>00121
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<a name="l00122"></a>00122         <span class="comment">//Sends the inverted words to the opened message queue.</span>
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<a name="l00123"></a>00123         <span class="keywordflow">if</span> (ret == KErrNone)
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<a name="l00124"></a>00124         {
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<a name="l00125"></a>00125         <a class="code" href="class_c_inverter.html#a120fb0b63f1b40f9ec514733724e8824">DoInvert</a>();
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<a name="l00126"></a>00126         iOutMsgQ.SendBlocking(idestMsg);
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<a name="l00127"></a>00127         }
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<a name="l00128"></a>00128         }
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<a name="l00129"></a>00129
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<a name="l00133"></a><a class="code" href="class_c_inverter.html#a120fb0b63f1b40f9ec514733724e8824">00133</a> <span class="keywordtype">void</span> <a class="code" href="class_c_inverter.html#a120fb0b63f1b40f9ec514733724e8824">CInverter::DoInvert</a>()
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<a name="l00134"></a>00134 {
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<a name="l00135"></a>00135 idestMsg.Zero();
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<a name="l00136"></a>00136 TInt i=0;
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<a name="l00137"></a>00137 <span class="keywordflow">while</span>(iMsgQData[i]!= <span class="charliteral">&#39;\r&#39;</span>)
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<a name="l00138"></a>00138 {
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<a name="l00139"></a>00139         <span class="keywordflow">while</span>((iMsgQData[i]!= <span class="charliteral">&#39; &#39;</span>)&amp;&amp;(iMsgQData[i]!= <span class="charliteral">&#39;\r&#39;</span>))
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<a name="l00140"></a>00140         {
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<a name="l00141"></a>00141         iwords.Append(iMsgQData[i]);
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<a name="l00142"></a>00142         i++;
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<a name="l00143"></a>00143         }
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<a name="l00144"></a>00144         <a class="code" href="class_c_inverter.html#a685b043131942beefd2f4fc886379475">ReverseWord</a>(iwords);
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<a name="l00145"></a>00145         idestMsg.Append(itmpWord);
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<a name="l00146"></a>00146         idestMsg.Append(<span class="charliteral">&#39; &#39;</span>);
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<a name="l00147"></a>00147         <span class="keywordflow">if</span>(iMsgQData[i]== <span class="charliteral">&#39;\r&#39;</span>)
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<a name="l00148"></a>00148         {
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<a name="l00149"></a>00149         i--;
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<a name="l00150"></a>00150         }
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<a name="l00151"></a>00151         i++;
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<a name="l00152"></a>00152         iwords.Zero();
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<a name="l00153"></a>00153     }
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<a name="l00154"></a>00154 }
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<a name="l00155"></a>00155
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<a name="l00159"></a><a class="code" href="class_c_inverter.html#a685b043131942beefd2f4fc886379475">00159</a> <span class="keywordtype">void</span> <a class="code" href="class_c_inverter.html#a685b043131942beefd2f4fc886379475">CInverter::ReverseWord</a>(TBuf&lt;20&gt; buf)
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<a name="l00160"></a>00160         {
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<a name="l00161"></a>00161         itmpWord.Zero();
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<a name="l00162"></a>00162         TInt size = (buf.Size())/2;
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<a name="l00163"></a>00163         <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=1; i&lt;= size; i++)
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<a name="l00164"></a>00164                 {
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<a name="l00165"></a>00165                 itmpWord.Append(buf[size -i]);
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<a name="l00166"></a>00166                 }
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<a name="l00167"></a>00167         }
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<a name="l00168"></a>00168
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<a name="l00173"></a><a class="code" href="class_c_inverter.html#a5b46657c2749a4a0b364e5fb54a272de">00173</a> <span class="keywordtype">void</span> <a class="code" href="class_c_inverter.html#a5b46657c2749a4a0b364e5fb54a272de">CInverter::Stop</a>()
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<a name="l00174"></a>00174         {
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<a name="l00175"></a>00175         iTimer-&gt;Cancel();
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<a name="l00176"></a>00176         <a class="code" href="class_c_inverter.html#a5b46657c2749a4a0b364e5fb54a272de">CActiveScheduler::Stop</a>();
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<a name="l00177"></a>00177         }
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<a name="l00178"></a>00178
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<a name="l00179"></a>00179 LOCAL_C <span class="keywordtype">void</span> DoStartL()
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<a name="l00180"></a>00180         {
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<a name="l00181"></a>00181
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<a name="l00182"></a>00182         CActiveScheduler* scheduler = <span class="keyword">new</span> (ELeave) CActiveScheduler();
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<a name="l00183"></a>00183         CleanupStack::PushL(scheduler);
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<a name="l00184"></a>00184         CActiveScheduler::Install(scheduler);
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<a name="l00185"></a>00185
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<a name="l00186"></a>00186         <a class="code" href="class_c_inverter.html">CInverter</a>* invert = CInverter::NewL();
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<a name="l00187"></a>00187         CleanupStack::PushL(invert);
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<a name="l00188"></a>00188
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<a name="l00189"></a>00189         <span class="comment">//Start the scheduler for the periodic timer</span>
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<a name="l00190"></a>00190         CActiveScheduler::Start();
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<a name="l00191"></a>00191
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<a name="l00192"></a>00192         CleanupStack::PopAndDestroy(invert);
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<a name="l00193"></a>00193         CleanupStack::PopAndDestroy(scheduler);
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<a name="l00194"></a>00194         }
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<a name="l00195"></a>00195
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<a name="l00196"></a><a class="code" href="_c_inverter_8cpp.html#a0f358e9c4355138f629b8c4f37310295">00196</a> GLDEF_C TInt E32Main()
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<a name="l00197"></a>00197         {
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<a name="l00198"></a>00198         __UHEAP_MARK;
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<a name="l00199"></a>00199         CTrapCleanup* cleanup = CTrapCleanup::New();
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<a name="l00200"></a>00200         <span class="keywordflow">if</span>(cleanup == NULL)
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<a name="l00201"></a>00201                 {
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<a name="l00202"></a>00202                 <span class="keywordflow">return</span> KErrNoMemory;
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<a name="l00203"></a>00203                 }
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<a name="l00204"></a>00204
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<a name="l00205"></a>00205
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<a name="l00206"></a>00206         TRAPD(mainError, DoStartL());
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<a name="l00207"></a>00207         <span class="keywordflow">if</span>(mainError != KErrNone)
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<a name="l00208"></a>00208                 {
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<a name="l00209"></a>00209                 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KUserPanic,<span class="stringliteral">&quot;Failed to complete&quot;</span>);
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<a name="l00210"></a>00210                 User::Panic(KUserPanic, mainError);
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<a name="l00211"></a>00211                 }
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<a name="l00212"></a>00212
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<a name="l00213"></a>00213                 <span class="keyword">delete</span> cleanup;
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<a name="l00214"></a>00214                 __UHEAP_MARKEND;
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<a name="l00215"></a>00215                 <span class="keywordflow">return</span> KErrNone;
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<a name="l00216"></a>00216         }
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</pre></div></div>
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<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
MCL/sftools/depl/docscontent