Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/starter_2src_2_active_bubble_sorter_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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<h1>examples/ForumNokia/Symbian_OS_Basics_Lab_Exercises_v3_1/Lab_04309.cb2/starter/src/ActiveBubbleSorter.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2006 Nokia Corporation.</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="preprocessor">#include "ActiveBubbleSorter.h"</span>
<a name="l00004"></a>00004 <span class="preprocessor">#include "BubbleSortNotify.h"</span>
<a name="l00005"></a>00005 <span class="preprocessor">#include <e32math.h></span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KSortDataInputFileName, <span class="stringliteral">"C:\\private\\0515DFCE\\sortdata_in.dat"</span>);
<a name="l00008"></a>00008 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KSortDataOutputFileName, <span class="stringliteral">"C:\\private\\0515DFCE\\sortdata_out.dat"</span>);
<a name="l00009"></a>00009 _LIT8(KNumberOutputFormat, <span class="stringliteral">"%d\r\n"</span>);
<a name="l00010"></a>00010
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="comment">// Constructs a CActiveBubbleSorter object</span>
<a name="l00013"></a>00013 <a class="code" href="class_c_active_bubble_sorter.html">CActiveBubbleSorter</a>* CActiveBubbleSorter::NewL()
<a name="l00014"></a>00014 {
<a name="l00015"></a>00015 <a class="code" href="class_c_active_bubble_sorter.html">CActiveBubbleSorter</a>* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_active_bubble_sorter.html">CActiveBubbleSorter</a>();
<a name="l00016"></a>00016 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00017"></a>00017 <span class="keyword">self</span>->ConstructL();
<a name="l00018"></a>00018 CleanupStack::Pop(<span class="keyword">self</span>);
<a name="l00019"></a>00019 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00020"></a>00020 }
<a name="l00021"></a>00021
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="comment">// C++ Constructor</span>
<a name="l00024"></a>00024 CActiveBubbleSorter::CActiveBubbleSorter()
<a name="l00025"></a>00025 : CActive(CActive::EPriorityIdle)
<a name="l00026"></a>00026 {
<a name="l00027"></a>00027 }
<a name="l00028"></a>00028
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="comment">// C++ Destructor</span>
<a name="l00031"></a>00031 CActiveBubbleSorter::~CActiveBubbleSorter()
<a name="l00032"></a>00032 {
<a name="l00033"></a>00033 }
<a name="l00034"></a>00034
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="comment">// Symbian 2nd phase construction</span>
<a name="l00037"></a>00037 <span class="keywordtype">void</span> CActiveBubbleSorter::ConstructL()
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 <span class="comment">// Do nothing</span>
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="comment">// Handles the cleanup necessary if sorting is cancelled</span>
<a name="l00044"></a>00044 <span class="keywordtype">void</span> CActiveBubbleSorter::DoCancel()
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment">// Handles each step of the sorting procedure</span>
<a name="l00050"></a>00050 <span class="keywordtype">void</span> CActiveBubbleSorter::RunL()
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">// Called to begin sorting</span>
<a name="l00056"></a>00056 <span class="keywordtype">void</span> CActiveBubbleSorter::StartL()
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="comment">// Reads numbers from an input file into an RArray</span>
<a name="l00062"></a>00062 <span class="keywordtype">void</span> CActiveBubbleSorter::ReadNumbersFromFileL()
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 <span class="comment">// Read contents of the input file into a descriptor</span>
<a name="l00065"></a>00065 RFs fs;
<a name="l00066"></a>00066 User::LeaveIfError(fs.Connect());
<a name="l00067"></a>00067 CleanupClosePushL(fs);
<a name="l00068"></a>00068
<a name="l00069"></a>00069 RFile file;
<a name="l00070"></a>00070 User::LeaveIfError(file.Open(fs, KSortDataInputFileName, EFileStreamText | EFileRead));
<a name="l00071"></a>00071 CleanupClosePushL(fs);
<a name="l00072"></a>00072
<a name="l00073"></a>00073 TInt sz = 0;
<a name="l00074"></a>00074 User::LeaveIfError(file.Size(sz));
<a name="l00075"></a>00075
<a name="l00076"></a>00076 HBufC8* buf = HBufC8::NewLC(sz);
<a name="l00077"></a>00077 TPtr8 ptr = buf->Des();
<a name="l00078"></a>00078 User::LeaveIfError(file.Read(ptr));
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="comment">// Extract numbers from the descriptor containing the contents of the input file</span>
<a name="l00081"></a>00081 TLex8 lx(ptr);
<a name="l00082"></a>00082 TBool finshed = EFalse;
<a name="l00083"></a>00083 <span class="keywordflow">while</span> (!finshed)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 <span class="keywordflow">if</span> (lx.Eos())
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 finshed = ETrue;
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((lx.Peek()).IsDigit())
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 TInt num;
<a name="l00092"></a>00092 TInt err = lx.Val(num);
<a name="l00093"></a>00093 iNumbersArray.Append(num);
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 <span class="keywordflow">else</span>
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 lx.Inc();
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 CleanupStack::PopAndDestroy(3); <span class="comment">// automatically closes fs and file</span>
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment">// Writes the numbers in the RArray to an output file</span>
<a name="l00106"></a>00106 <span class="keywordtype">void</span> CActiveBubbleSorter::WriteNumbersToFileL()
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 RFs fs;
<a name="l00109"></a>00109 User::LeaveIfError(fs.Connect());
<a name="l00110"></a>00110 CleanupClosePushL(fs);
<a name="l00111"></a>00111
<a name="l00112"></a>00112 TInt ret = fs.Delete(KSortDataOutputFileName);
<a name="l00113"></a>00113 <span class="keywordflow">if</span> (!(ret == KErrNone || ret == KErrNotFound))
<a name="l00114"></a>00114 {
<a name="l00115"></a>00115 User::Leave(ret);
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a>00118 RFile file;
<a name="l00119"></a>00119 User::LeaveIfError(file.Create(fs, KSortDataOutputFileName, EFileStreamText | EFileWrite));
<a name="l00120"></a>00120 CleanupClosePushL(fs);
<a name="l00121"></a>00121
<a name="l00122"></a>00122 TBuf8<10> buf;
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="keywordflow">for</span> (TInt i = 0; i < iNumbersArray.Count(); i++)
<a name="l00125"></a>00125 {
<a name="l00126"></a>00126 buf.Format(KNumberOutputFormat, iNumbersArray[i]);
<a name="l00127"></a>00127 file.Write(buf);
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129
<a name="l00130"></a>00130 CleanupStack::PopAndDestroy(2); <span class="comment">// automatically closes fs and file</span>
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="comment">// Called in the event the RunL function leaves</span>
<a name="l00135"></a>00135 TInt CActiveBubbleSorter::RunError(TInt aError)
<a name="l00136"></a>00136 {
<a name="l00137"></a>00137 iNumbersArray.Reset();
<a name="l00138"></a>00138 iNotifier.<a class="code" href="class_m_bubble_sort_notify.html#a4efe680a413c28e6b6a7a92df6f0928c">SortComplete</a>(aError);
<a name="l00139"></a>00139
<a name="l00140"></a>00140 <span class="keywordflow">return</span> KErrNone;
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="comment">// End of file</span>
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