Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_other_buffers_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/DescriptorExample/src/OtherBuffers.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright © 2008 Nokia Corporation.</span>
<a name="l00003"></a>00003 <span class="comment"> */</span>
<a name="l00004"></a>00004
<a name="l00005"></a>00005 <span class="preprocessor">#include <e32std.h></span>
<a name="l00006"></a>00006 <span class="preprocessor">#include <e32base.h></span>
<a name="l00007"></a>00007 <span class="preprocessor">#include "DescriptorExamples.h"</span>
<a name="l00008"></a>00008 <span class="preprocessor">#include "StringRenderer.h"</span>
<a name="l00009"></a>00009
<a name="l00010"></a>00010 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00011"></a>00011 <span class="comment">// The example class above and helper functions are used by examples.</span>
<a name="l00012"></a>00012 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00013"></a>00013 <span class="keyword">class </span>TExample
<a name="l00014"></a>00014 {
<a name="l00015"></a>00015 <span class="keyword">public</span>:
<a name="l00016"></a>00016 TExample() : iNumber(0), iText() {}
<a name="l00017"></a>00017 TExample(TInt aNumber, <span class="keyword">const</span> TDesC &aText);
<a name="l00018"></a>00018 <span class="keyword">public</span>:
<a name="l00019"></a>00019 TInt iNumber;
<a name="l00020"></a>00020 TBuf<16> iText;
<a name="l00021"></a>00021 };
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="comment">// render message and characteristics of TExample class</span>
<a name="l00024"></a>00024 <span class="comment">// e.g. 'message: 10, "abcd"'</span>
<a name="l00025"></a>00025 LOCAL_C <span class="keywordtype">void</span> ShowContents(<span class="keyword">const</span> TDesC &aMsg,
<a name="l00026"></a>00026 <span class="keyword">const</span> TExample aExample,
<a name="l00027"></a>00027 TPtr &aOutput );
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="comment">// render message and contents of given descriptor character data,</span>
<a name="l00030"></a>00030 <span class="comment">// e.g. 'message: "abcd"'</span>
<a name="l00031"></a>00031 LOCAL_C <span class="keywordtype">void</span> ShowContents(<span class="keyword">const</span> TDesC &aMsg,
<a name="l00032"></a>00032 <span class="keyword">const</span> TDesC &aTxt,
<a name="l00033"></a>00033 TPtr &aOutput);
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="comment">// render message and contents of given descriptor character data,</span>
<a name="l00036"></a>00036 <span class="comment">// e.g. 'message: "abcd"'</span>
<a name="l00037"></a>00037 LOCAL_C <span class="keywordtype">void</span> ShowContents(<span class="keyword">const</span> TDesC &aMsg,
<a name="l00038"></a>00038 <span class="keyword">const</span> TDesC8 &aTxt,
<a name="l00039"></a>00039 TPtr &aOutput);
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="comment">// render number of items in fifo and maximum number of</span>
<a name="l00042"></a>00042 <span class="comment">// items the given fifo can store. e.g. 'fifo: size=1, max=5'.</span>
<a name="l00043"></a>00043 <span class="keyword">template</span> <<span class="keyword">class</span> T>
<a name="l00044"></a>00044 LOCAL_C <span class="keywordtype">void</span> ShowContents(CCirBuf<T> *aFIFO, TPtr &aOutput);
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="comment">// Render characteristics of flat dynamic buffer storing 8 bit characters.</span>
<a name="l00047"></a>00047 <span class="comment">// The result is similar to this example:</span>
<a name="l00048"></a>00048 <span class="comment">//</span>
<a name="l00049"></a>00049 <span class="comment">// CBufFlat: size=8, data @13984184=</span>
<a name="l00050"></a>00050 <span class="comment">// "abcdefgh"</span>
<a name="l00051"></a>00051 <span class="comment">//</span>
<a name="l00052"></a>00052 LOCAL_C <span class="keywordtype">void</span> ShowBuf(CBufFlat &aBuf, TDes &aOutput);
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="comment">// Render characteristics of segmented dynamic buffer storing 8 bit</span>
<a name="l00055"></a>00055 <span class="comment">// characters. The result is similar to this example:</span>
<a name="l00056"></a>00056 <span class="comment">//</span>
<a name="l00057"></a>00057 <span class="comment">// CBufSeg: size=28, segments=</span>
<a name="l00058"></a>00058 <span class="comment">// "abcdefghij" @13984212</span>
<a name="l00059"></a>00059 <span class="comment">// "klmnopqrst" @13984248</span>
<a name="l00060"></a>00060 <span class="comment">// "uvwxyz01" @13984284</span>
<a name="l00061"></a>00061 <span class="comment">//</span>
<a name="l00062"></a>00062 LOCAL_C <span class="keywordtype">void</span> ShowBuf(CBufSeg &aBuf, TDes &aOutput);
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="comment">// Render characteristics of package buffer storing TExample object.</span>
<a name="l00065"></a>00065 <span class="comment">// The result is similar to this example:</span>
<a name="l00066"></a>00066 <span class="comment">//</span>
<a name="l00067"></a>00067 <span class="comment">// TPckgBuf @309000944, sizeof=52, storing</span>
<a name="l00068"></a>00068 <span class="comment">// TExample @309000952, sizeof=44, iNumber=1234567, iText="Hello!"</span>
<a name="l00069"></a>00069 <span class="comment">//</span>
<a name="l00070"></a>00070 LOCAL_C <span class="keywordtype">void</span> ShowContents(TPckgBuf<TExample> &aPackageBuf, TPtr &aOutput);
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">// Render characteristics of package buffer pointer referring to TExample</span>
<a name="l00073"></a>00073 <span class="comment">// object. The result is similar to this example:</span>
<a name="l00074"></a>00074 <span class="comment">//</span>
<a name="l00075"></a>00075 <span class="comment">// TPckg @309000932, sizeof=12, referring to</span>
<a name="l00076"></a>00076 <span class="comment">// TExample @309001012, sizeof=44, iNumber=12345, iText="Hello!"</span>
<a name="l00077"></a>00077 <span class="comment">//</span>
<a name="l00078"></a>00078 LOCAL_C <span class="keywordtype">void</span> ShowContents(TPckg<TExample> &aPackage, TPtr &aOutput);
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="comment">// Texts for adding and removing operations</span>
<a name="l00081"></a>00081 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>( KAddedMsg, <span class="stringliteral">"\nAdded"</span> );
<a name="l00082"></a>00082 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>( KRemovedMsg, <span class="stringliteral">"\nRemoved"</span> );
<a name="l00083"></a>00083 _LIT8( KChars8, <span class="stringliteral">"abcdefghijklmnopqrstuvwxyz0123456789"</span> );
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00086"></a>00086 <span class="comment">// This example method is documented in header file "DescriptorExamples.h"</span>
<a name="l00087"></a>00087 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00088"></a><a class="code" href="class_c_descriptor_examples.html#a16794acec84adb6c9f9bd53493bfda8f">00088</a> <span class="keywordtype">void</span> <a class="code" href="class_c_descriptor_examples.html#a16794acec84adb6c9f9bd53493bfda8f">CDescriptorExamples::CircularBuffersL</a>()
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 TPtr output( iViewer-><a class="code" href="class_m_result_viewer.html#a30d7e86bbb78ba769648736a9ee9e62d">GetViewBuffer</a>() );
<a name="l00091"></a>00091 RenderHeader( _L( <span class="stringliteral">"CircularBuffers:TText"</span> ), output );
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">// -------------------------------------------------------------------------</span>
<a name="l00094"></a>00094 <span class="comment">// This first example demonstrates how circular buffers can be used to</span>
<a name="l00095"></a>00095 <span class="comment">// buffer character data.</span>
<a name="l00096"></a>00096 TBuf<10> deletedChars; <span class="comment">// stores characters removed from fifo</span>
<a name="l00097"></a>00097 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>( KNumbersTxt, <span class="stringliteral">"0123456789"</span> );
<a name="l00098"></a>00098 <span class="comment">// point to first character in character array stored in TLitC</span>
<a name="l00099"></a>00099 TText *charPtr = (TText*)KNumbersTxt().Ptr();
<a name="l00100"></a>00100 CCirBuf<TText> *textFIFO;
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="comment">// construct fifo able to store up to ten characters:</span>
<a name="l00103"></a>00103 <span class="comment">// contents of fifo is shown below (H=head, T=Tail).</span>
<a name="l00104"></a>00104 <span class="comment">// fifo: data= "__________", count = 0</span>
<a name="l00105"></a>00105 <span class="comment">// ^</span>
<a name="l00106"></a>00106 <span class="comment">// H&T</span>
<a name="l00107"></a>00107 textFIFO = <span class="keyword">new</span> (ELeave) CCirBuf<TText>();
<a name="l00108"></a>00108 CleanupStack::PushL( textFIFO );
<a name="l00109"></a>00109 textFIFO->SetLengthL( 10 ); <span class="comment">// can store up to ten characters</span>
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="comment">// Copy first 5 items (characters) to fifo</span>
<a name="l00112"></a>00112 <span class="comment">// fifo: data= "01234_____", count = 5</span>
<a name="l00113"></a>00113 <span class="comment">// ^ ^</span>
<a name="l00114"></a>00114 <span class="comment">// T H</span>
<a name="l00115"></a>00115 textFIFO->Add( charPtr, 5 ); <span class="comment">// 01234</span>
<a name="l00116"></a>00116 ShowContents( KAddedMsg, KNumbersTxt().Left(5), output );
<a name="l00117"></a>00117 ShowContents( textFIFO, output ); <span class="comment">// size=5, max=10</span>
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="comment">// remove three items from fifo (first three characters) and</span>
<a name="l00120"></a>00120 <span class="comment">// store copies of them to deletedChars buffer.</span>
<a name="l00121"></a>00121 <span class="comment">// fifo: data= "___34_____", count = 2</span>
<a name="l00122"></a>00122 <span class="comment">// ^ ^</span>
<a name="l00123"></a>00123 <span class="comment">// T H</span>
<a name="l00124"></a>00124 textFIFO->Remove( (TText*)deletedChars.Ptr(), 3 ); <span class="comment">// chars "012"</span>
<a name="l00125"></a>00125 deletedChars.SetLength(3);
<a name="l00126"></a>00126 ShowContents( KRemovedMsg, deletedChars, output );
<a name="l00127"></a>00127 ShowContents( textFIFO, output ); <span class="comment">// size=5, max=10</span>
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="comment">// add 6 characters so the head rounds to the beginning.</span>
<a name="l00130"></a>00130 <span class="comment">// fifo: data= "5__3401234", count = 8</span>
<a name="l00131"></a>00131 <span class="comment">// ^ ^</span>
<a name="l00132"></a>00132 <span class="comment">// H T</span>
<a name="l00133"></a>00133 textFIFO->Add( charPtr, 6 ); <span class="comment">// 012345</span>
<a name="l00134"></a>00134 ShowContents( KAddedMsg, KNumbersTxt().Left(6), output );
<a name="l00135"></a>00135 ShowContents( textFIFO, output ); <span class="comment">// size=8, max=10</span>
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="comment">// try to add 4 characters. Since there isn't enough space</span>
<a name="l00138"></a>00138 <span class="comment">// only two characters are added since no more room available.</span>
<a name="l00139"></a>00139 <span class="comment">// fifo: data= "5013401234", count = 10</span>
<a name="l00140"></a>00140 <span class="comment">// ^</span>
<a name="l00141"></a>00141 <span class="comment">// H&T</span>
<a name="l00142"></a>00142 TInt charsAdded = textFIFO->Add( charPtr, 4 ); <span class="comment">// 0123</span>
<a name="l00143"></a>00143 ShowContents( KAddedMsg, KNumbersTxt().Left(4), output );
<a name="l00144"></a>00144 output.AppendFormat( _L(<span class="stringliteral">"But only %d characters was really added\n"</span>),
<a name="l00145"></a>00145 charsAdded );
<a name="l00146"></a>00146 ShowContents( textFIFO, output ); <span class="comment">// size=10, max=10</span>
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="comment">// remove eight items from fifo (now tail rounds to beginning)</span>
<a name="l00149"></a>00149 <span class="comment">// fifo: data= "_01_______", count = 2</span>
<a name="l00150"></a>00150 <span class="comment">// ^ ^</span>
<a name="l00151"></a>00151 <span class="comment">// T H</span>
<a name="l00152"></a>00152 textFIFO->Remove( (TText*)deletedChars.Ptr(), 8 ); <span class="comment">// chars "34012345"</span>
<a name="l00153"></a>00153 deletedChars.SetLength(8);
<a name="l00154"></a>00154 ShowContents( KRemovedMsg, deletedChars, output );
<a name="l00155"></a>00155 ShowContents( textFIFO, output ); <span class="comment">// size=2, max=10</span>
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="comment">// -------------------------------------------------------------------------</span>
<a name="l00158"></a>00158 <span class="comment">// This example introduces how CCirBuf is used to store complex data types.</span>
<a name="l00159"></a>00159 <span class="comment">// Since CCirBuf is templated its items can be any type.</span>
<a name="l00160"></a>00160 RenderHeader( _L( <span class="stringliteral">"CircularBuffers:TExample"</span> ), output );
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="comment">// declare pointer to circular buffer (FIFO) that is able</span>
<a name="l00163"></a>00163 <span class="comment">// to store TExample items.</span>
<a name="l00164"></a>00164 CCirBuf<TExample> *exampleFIFO;
<a name="l00165"></a>00165 <span class="comment">// when items are removed one by one, the copy of deleted item</span>
<a name="l00166"></a>00166 <span class="comment">// is copied to this instance</span>
<a name="l00167"></a>00167 TExample removedItem;
<a name="l00168"></a>00168
<a name="l00169"></a>00169 <span class="comment">// Construct an instance of FIFO that can store up to</span>
<a name="l00170"></a>00170 <span class="comment">// five Example class instances.</span>
<a name="l00171"></a>00171 exampleFIFO = <span class="keyword">new</span> (ELeave) CCirBuf<TExample>();
<a name="l00172"></a>00172 CleanupStack::PushL( exampleFIFO );
<a name="l00173"></a>00173 exampleFIFO->SetLengthL( 5 );
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <span class="comment">// Populate FIFO with three items and show contents</span>
<a name="l00176"></a>00176 <span class="comment">// of added item and state of FIFO.</span>
<a name="l00177"></a>00177 TExample one(1, _L(<span class="stringliteral">"one"</span>));
<a name="l00178"></a>00178 exampleFIFO->Add( &one );
<a name="l00179"></a>00179 ShowContents( KAddedMsg, one, output );
<a name="l00180"></a>00180 ShowContents( exampleFIFO, output ); <span class="comment">// size=1, max=5</span>
<a name="l00181"></a>00181
<a name="l00182"></a>00182 TExample two(2, _L(<span class="stringliteral">"two"</span>));
<a name="l00183"></a>00183 exampleFIFO->Add( &two );
<a name="l00184"></a>00184 ShowContents( KAddedMsg, two, output );
<a name="l00185"></a>00185 ShowContents( exampleFIFO, output ); <span class="comment">// size=2, max=5</span>
<a name="l00186"></a>00186
<a name="l00187"></a>00187 TExample three(3, _L(<span class="stringliteral">"three"</span>));
<a name="l00188"></a>00188 exampleFIFO->Add( &three );
<a name="l00189"></a>00189 ShowContents( KAddedMsg, three, output );
<a name="l00190"></a>00190 ShowContents( exampleFIFO, output ); <span class="comment">// size=3, max=5</span>
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="comment">// Remove item by item from FIFO and show contents of</span>
<a name="l00193"></a>00193 <span class="comment">// removed item and the state of FIFO.</span>
<a name="l00194"></a>00194 <span class="comment">// Remove() method takes a pointer to object where contents</span>
<a name="l00195"></a>00195 <span class="comment">// of removed item is copied (binary copy)</span>
<a name="l00196"></a>00196 <span class="keywordflow">while</span>( exampleFIFO->Count() > 0 )
<a name="l00197"></a>00197 {
<a name="l00198"></a>00198 exampleFIFO->Remove( &removedItem );
<a name="l00199"></a>00199 ShowContents( KRemovedMsg, removedItem, output );
<a name="l00200"></a>00200 ShowContents( exampleFIFO, output );
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202
<a name="l00203"></a>00203 iViewer-><a class="code" href="class_m_result_viewer.html#a8e10673e2504a4af6382f26794bb8004">UpdateView</a>();
<a name="l00204"></a>00204 CleanupStack::PopAndDestroy(2); <span class="comment">// exampleFIFO, textFIFO</span>
<a name="l00205"></a>00205 }
<a name="l00206"></a>00206
<a name="l00207"></a>00207 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00208"></a>00208 <span class="comment">// This example method is documented in header file "DescriptorExamples.h" and</span>
<a name="l00209"></a>00209 <span class="comment">// implementation specific documentation can be read below.</span>
<a name="l00210"></a>00210 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00211"></a><a class="code" href="class_c_descriptor_examples.html#a7b302d526ed71c8039a1be75d9ceb21a">00211</a> <span class="keywordtype">void</span> <a class="code" href="class_c_descriptor_examples.html#a7b302d526ed71c8039a1be75d9ceb21a">CDescriptorExamples::FlatDynamicBuffersL</a>()
<a name="l00212"></a>00212 {
<a name="l00213"></a>00213 TPtr output( iViewer-><a class="code" href="class_m_result_viewer.html#a30d7e86bbb78ba769648736a9ee9e62d">GetViewBuffer</a>() );
<a name="l00214"></a>00214 RenderHeader( _L( <span class="stringliteral">"FlatDynamicBuffers"</span> ), output );
<a name="l00215"></a>00215
<a name="l00216"></a>00216 <span class="comment">// -------------------------------------------------------------------------</span>
<a name="l00217"></a>00217 <span class="comment">// When content (8 bit characters) are added to container, it allocates the</span>
<a name="l00218"></a>00218 <span class="comment">// memory automatically. In the first steps it can extend the existing heap</span>
<a name="l00219"></a>00219 <span class="comment">// cell when more space is needed.</span>
<a name="l00220"></a>00220 <span class="comment">//</span>
<a name="l00221"></a>00221 <span class="comment">// However, later in the example a HBufC is allocated from heap to prevent</span>
<a name="l00222"></a>00222 <span class="comment">// heap cell extending. When more data is appended to buffer, a new heap</span>
<a name="l00223"></a>00223 <span class="comment">// cell is allocated from somewhere else, existing content is copied to new</span>
<a name="l00224"></a>00224 <span class="comment">// cell, new content to be appended is added after it and finally the</span>
<a name="l00225"></a>00225 <span class="comment">// existing heap cell is deallocated.</span>
<a name="l00226"></a>00226 <span class="comment">//</span>
<a name="l00227"></a>00227 <span class="comment">// The contents of buffer is shown after each character insertion. The</span>
<a name="l00228"></a>00228 <span class="comment">// location of data (memory address of heap cell) doesn't change until the</span>
<a name="l00229"></a>00229 <span class="comment">// fourth insertion because heap cell can't extend anymore.</span>
<a name="l00230"></a>00230
<a name="l00231"></a>00231 <span class="comment">// construct a flat dynamic buffer that will automatically extend its heap</span>
<a name="l00232"></a>00232 <span class="comment">// cell size with 10 bytes when more space is needed.</span>
<a name="l00233"></a>00233 CBufFlat *buf = CBufFlat::NewL( 10 );
<a name="l00234"></a>00234 CleanupStack::PushL(buf);
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="comment">// this variable is used to refer a portion of characters in KChars8</span>
<a name="l00237"></a>00237 TPtrC8 charsToInsert(NULL, 0);
<a name="l00238"></a>00238
<a name="l00239"></a>00239 charsToInsert.Set( KChars8().Mid( 0, 8 ) ); <span class="comment">// "abcdefgh"</span>
<a name="l00240"></a>00240 buf->InsertL( 0, charsToInsert );
<a name="l00241"></a>00241 ShowContents( KAddedMsg, charsToInsert, output );
<a name="l00242"></a>00242 ShowBuf( *buf, output );
<a name="l00243"></a>00243
<a name="l00244"></a>00244 charsToInsert.Set( KChars8().Mid( 8, 8 ) ); <span class="comment">// "ijklmnop"</span>
<a name="l00245"></a>00245 buf->InsertL( 8, charsToInsert );
<a name="l00246"></a>00246 ShowContents( KAddedMsg, charsToInsert, output );
<a name="l00247"></a>00247 ShowBuf( *buf, output );
<a name="l00248"></a>00248
<a name="l00249"></a>00249 charsToInsert.Set( KChars8().Mid( 16, 12 ) ); <span class="comment">// "ijklmnop"</span>
<a name="l00250"></a>00250 buf->InsertL( 16, charsToInsert );
<a name="l00251"></a>00251 ShowContents( KAddedMsg, charsToInsert, output );
<a name="l00252"></a>00252 ShowBuf( *buf, output );
<a name="l00253"></a>00253
<a name="l00254"></a>00254 <span class="comment">// this object is allocated just after the flat dynamic buffers heap</span>
<a name="l00255"></a>00255 <span class="comment">// cell preventing it to extend its cell size when more space is needed.</span>
<a name="l00256"></a>00256 HBufC *tmpBuf = HBufC::NewL( 50 );
<a name="l00257"></a>00257 CleanupStack::PushL( tmpBuf );
<a name="l00258"></a>00258 tmpBuf->Length(); <span class="comment">// remove compiler warning that variable is not used</span>
<a name="l00259"></a>00259
<a name="l00260"></a>00260 <span class="comment">// appending this data to buffer requires heap cell to extend.</span>
<a name="l00261"></a>00261 <span class="comment">// tmpBuf prevents heap cell to extend so new cell has to be</span>
<a name="l00262"></a>00262 <span class="comment">// allocated, original data copied to there and existing cell</span>
<a name="l00263"></a>00263 <span class="comment">// to be freed.</span>
<a name="l00264"></a>00264 charsToInsert.Set( KChars8().Mid( 4, 20 ) ); <span class="comment">// "efghijklmnopqrstuvwx"</span>
<a name="l00265"></a>00265 buf->InsertL(28, charsToInsert );
<a name="l00266"></a>00266 ShowContents( KAddedMsg, charsToInsert, output );
<a name="l00267"></a>00267 ShowBuf( *buf, output );
<a name="l00268"></a>00268
<a name="l00269"></a>00269 iViewer-><a class="code" href="class_m_result_viewer.html#a8e10673e2504a4af6382f26794bb8004">UpdateView</a>();
<a name="l00270"></a>00270 CleanupStack::PopAndDestroy(2); <span class="comment">// tmpBuf, buf</span>
<a name="l00271"></a>00271 }
<a name="l00272"></a>00272
<a name="l00273"></a>00273 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00274"></a>00274 <span class="comment">// This example method is documented in header file "DescriptorExamples.h"</span>
<a name="l00275"></a>00275 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00276"></a><a class="code" href="class_c_descriptor_examples.html#a4fbafdaa5db8471d65748de40a0fac1b">00276</a> <span class="keywordtype">void</span> <a class="code" href="class_c_descriptor_examples.html#a4fbafdaa5db8471d65748de40a0fac1b">CDescriptorExamples::SegmentedDynamicBuffersL</a>()
<a name="l00277"></a>00277 {
<a name="l00278"></a>00278 TPtr output( iViewer-><a class="code" href="class_m_result_viewer.html#a30d7e86bbb78ba769648736a9ee9e62d">GetViewBuffer</a>() );
<a name="l00279"></a>00279 RenderHeader( _L( <span class="stringliteral">"SegmentedDynamicBuffers"</span> ), output );
<a name="l00280"></a>00280
<a name="l00281"></a>00281 <span class="comment">// Allocate a empty buffer with granularity of 10</span>
<a name="l00282"></a>00282 CBufSeg* buf = CBufSeg::NewL(10);
<a name="l00283"></a>00283 CleanupStack::PushL( buf );
<a name="l00284"></a>00284
<a name="l00285"></a>00285 TPtrC8 charsToInsert(NULL, 0);
<a name="l00286"></a>00286
<a name="l00287"></a>00287 <span class="comment">// append "abcdefgh"</span>
<a name="l00288"></a>00288 <span class="comment">// All eight characters fit to first segment</span>
<a name="l00289"></a>00289 charsToInsert.Set( KChars8().Mid(0, 8) );
<a name="l00290"></a>00290 buf->InsertL(0, charsToInsert );
<a name="l00291"></a>00291 ShowContents( KAddedMsg, charsToInsert, output );
<a name="l00292"></a>00292 ShowBuf( *buf, output );
<a name="l00293"></a>00293
<a name="l00294"></a>00294 <span class="comment">// append "ijklmnop"</span>
<a name="l00295"></a>00295 <span class="comment">// first two characters go to the first segment and</span>
<a name="l00296"></a>00296 <span class="comment">// the rest six to second one.</span>
<a name="l00297"></a>00297 charsToInsert.Set( KChars8().Mid(8, 8) );
<a name="l00298"></a>00298 buf->InsertL(8, charsToInsert );
<a name="l00299"></a>00299 ShowContents( KAddedMsg, charsToInsert, output );
<a name="l00300"></a>00300 ShowBuf( *buf, output );
<a name="l00301"></a>00301
<a name="l00302"></a>00302 <span class="comment">// append "qrstuvwxyz01"</span>
<a name="l00303"></a>00303 <span class="comment">// first four characters go to the second segment and</span>
<a name="l00304"></a>00304 <span class="comment">// the rest eight to third one.</span>
<a name="l00305"></a>00305 charsToInsert.Set( KChars8().Mid(16, 12) );
<a name="l00306"></a>00306 buf->InsertL(16, charsToInsert );
<a name="l00307"></a>00307 ShowContents( KAddedMsg, charsToInsert, output );
<a name="l00308"></a>00308 ShowBuf( *buf, output );
<a name="l00309"></a>00309
<a name="l00310"></a>00310 <span class="comment">// append "efghijklmnopqrstuvwx"</span>
<a name="l00311"></a>00311 <span class="comment">// first two characters go to the third segment. Next ten to</span>
<a name="l00312"></a>00312 <span class="comment">// fourth segment and rest eight to fifth segment.</span>
<a name="l00313"></a>00313 charsToInsert.Set( KChars8().Mid(4, 20) );
<a name="l00314"></a>00314 buf->InsertL(28, charsToInsert );
<a name="l00315"></a>00315 ShowContents( KAddedMsg, charsToInsert, output );
<a name="l00316"></a>00316 ShowBuf( *buf, output );
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="comment">// delete a portion from the segmented buffer.</span>
<a name="l00319"></a>00319 <span class="comment">//</span>
<a name="l00320"></a>00320 <span class="comment">// An exmaple run shows that segments before deletion are</span>
<a name="l00321"></a>00321 <span class="comment">//</span>
<a name="l00322"></a>00322 <span class="comment">// CBufSeg: size=48, segments=</span>
<a name="l00323"></a>00323 <span class="comment">// "abcdefghij" @13984212</span>
<a name="l00324"></a>00324 <span class="comment">// "klmnopqrst" @13984248</span>
<a name="l00325"></a>00325 <span class="comment">// "uvwxyz01ef" @13984284</span>
<a name="l00326"></a>00326 <span class="comment">// "ghijklmnop" @13984356</span>
<a name="l00327"></a>00327 <span class="comment">// "qrstuvwx" @13984320</span>
<a name="l00328"></a>00328 <span class="comment">//</span>
<a name="l00329"></a>00329 <span class="comment">// and after deletion there are segments:</span>
<a name="l00330"></a>00330 <span class="comment">//</span>
<a name="l00331"></a>00331 <span class="comment">// CBufSeg: size=24, segments=</span>
<a name="l00332"></a>00332 <span class="comment">// "abc" @13984212</span>
<a name="l00333"></a>00333 <span class="comment">// "1ef" @13984284</span>
<a name="l00334"></a>00334 <span class="comment">// "ghijklmnop" @13984356</span>
<a name="l00335"></a>00335 <span class="comment">// "qrstuvwx" @13984320</span>
<a name="l00336"></a>00336 <span class="comment">//</span>
<a name="l00337"></a>00337 <span class="comment">// From this example it can be seen that modifying segment</span>
<a name="l00338"></a>00338 <span class="comment">// buffer can result segments not fully filled. That's why</span>
<a name="l00339"></a>00339 <span class="comment">// direct access thought pointer is difficult since the</span>
<a name="l00340"></a>00340 <span class="comment">// segment sizes varies.</span>
<a name="l00341"></a>00341 buf->Delete(3, 24);
<a name="l00342"></a>00342 output.Append( _L(<span class="stringliteral">"\nDeleted 24 bytes from index 4\n"</span>) );
<a name="l00343"></a>00343 ShowBuf( *buf, output );
<a name="l00344"></a>00344
<a name="l00345"></a>00345 <span class="comment">// Replace character at even index with 'X'</span>
<a name="l00346"></a>00346 <span class="comment">//</span>
<a name="l00347"></a>00347 <span class="comment">// Since data is splitted to segments that may contain variable</span>
<a name="l00348"></a>00348 <span class="comment">// number of character data it would be quite difficult to alter</span>
<a name="l00349"></a>00349 <span class="comment">// data with pointer access. That's why the easiest way to alter</span>
<a name="l00350"></a>00350 <span class="comment">// data is to copy it to fixed sized buffer, modify the copy and</span>
<a name="l00351"></a>00351 <span class="comment">// write modified content over original data.</span>
<a name="l00352"></a>00352 <span class="comment">//</span>
<a name="l00353"></a>00353 <span class="comment">// Since the segmented buffer could be quite long in real problem</span>
<a name="l00354"></a>00354 <span class="comment">// it is better to get used to modify the content in pieces.</span>
<a name="l00355"></a>00355 <span class="comment">//</span>
<a name="l00356"></a>00356 <span class="comment">// Example run produces:</span>
<a name="l00357"></a>00357 <span class="comment">//</span>
<a name="l00358"></a>00358 <span class="comment">// CBufSeg: size=24, segments=</span>
<a name="l00359"></a>00359 <span class="comment">// "aXc" @13984212</span>
<a name="l00360"></a>00360 <span class="comment">// "XeX" @13984284</span>
<a name="l00361"></a>00361 <span class="comment">// "gXiXkXmXoX" @13984356</span>
<a name="l00362"></a>00362 <span class="comment">// "qXsXuXwX" @13984320</span>
<a name="l00363"></a>00363 <span class="comment">//</span>
<a name="l00364"></a>00364 TBuf8<20> tmpBuf;
<a name="l00365"></a>00365 <span class="keywordflow">for</span>( TInt i=0; i < buf->Size(); i += tmpBuf.MaxLength() )
<a name="l00366"></a>00366 {
<a name="l00367"></a>00367 TInt charsToCopy = buf->Size() - i; <span class="comment">// Chars left</span>
<a name="l00368"></a>00368
<a name="l00369"></a>00369 <span class="comment">// do not try to read more than tmpBuf can hold</span>
<a name="l00370"></a>00370 <span class="keywordflow">if</span>( charsToCopy > tmpBuf.MaxLength() )
<a name="l00371"></a>00371 {
<a name="l00372"></a>00372 charsToCopy = tmpBuf.MaxLength();
<a name="l00373"></a>00373 }
<a name="l00374"></a>00374
<a name="l00375"></a>00375 <span class="comment">// copy data from segmented buffer to descriptor</span>
<a name="l00376"></a>00376 buf->Read(i, tmpBuf, charsToCopy);
<a name="l00377"></a>00377
<a name="l00378"></a>00378 <span class="comment">// Change character in descriptor at even index</span>
<a name="l00379"></a>00379 <span class="keywordflow">for</span>(TInt j=0; j<charsToCopy; j++)
<a name="l00380"></a>00380 {
<a name="l00381"></a>00381 <span class="keywordflow">if</span>( j % 2 != 0 )
<a name="l00382"></a>00382 {
<a name="l00383"></a>00383 tmpBuf[j] = <span class="charliteral">'X'</span>;
<a name="l00384"></a>00384 }
<a name="l00385"></a>00385 }
<a name="l00386"></a>00386
<a name="l00387"></a>00387 <span class="comment">// write modified content to the same location it was read</span>
<a name="l00388"></a>00388 buf->Write(i, tmpBuf, charsToCopy);
<a name="l00389"></a>00389 }
<a name="l00390"></a>00390 output.Append( _L(<span class="stringliteral">"\nReplaced characters at even index with 'X'\n"</span>) );
<a name="l00391"></a>00391 ShowBuf( *buf, output );
<a name="l00392"></a>00392
<a name="l00393"></a>00393 <span class="comment">// lets compress the data to minimize heap usage: partially</span>
<a name="l00394"></a>00394 <span class="comment">// filled segments are fullfilled and segments no more</span>
<a name="l00395"></a>00395 <span class="comment">// needed are deallocated.</span>
<a name="l00396"></a>00396 <span class="comment">//</span>
<a name="l00397"></a>00397 <span class="comment">// Example run produces:</span>
<a name="l00398"></a>00398 <span class="comment">//</span>
<a name="l00399"></a>00399 <span class="comment">// CBufSeg: size=24, segments=</span>
<a name="l00400"></a>00400 <span class="comment">// "aXcXeXgXiX" @13984212</span>
<a name="l00401"></a>00401 <span class="comment">// "kXmXoXqXsX" @13984356</span>
<a name="l00402"></a>00402 <span class="comment">// "uXwX" @13984320</span>
<a name="l00403"></a>00403 <span class="comment">//</span>
<a name="l00404"></a>00404 <span class="comment">// (first and second segments were fullfilled. There didn't</span>
<a name="l00405"></a>00405 <span class="comment">// exist any data in fourth segment so if was deleted)</span>
<a name="l00406"></a>00406 <span class="comment">//</span>
<a name="l00407"></a>00407 buf->Compress();
<a name="l00408"></a>00408 output.Append( _L(<span class="stringliteral">"\nCompressed buffer\n"</span>) );
<a name="l00409"></a>00409 ShowBuf( *buf, output );
<a name="l00410"></a>00410
<a name="l00411"></a>00411 iViewer-><a class="code" href="class_m_result_viewer.html#a8e10673e2504a4af6382f26794bb8004">UpdateView</a>();
<a name="l00412"></a>00412 CleanupStack::PopAndDestroy(1);
<a name="l00413"></a>00413 }
<a name="l00414"></a>00414
<a name="l00415"></a>00415
<a name="l00416"></a>00416
<a name="l00417"></a>00417 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00418"></a>00418 <span class="comment">// This example method is documented in header file "DescriptorExamples.h"</span>
<a name="l00419"></a>00419 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00420"></a><a class="code" href="class_c_descriptor_examples.html#aa3004492a8d6c9ba4aebeb1b81b1f6a3">00420</a> <span class="keywordtype">void</span> <a class="code" href="class_c_descriptor_examples.html#aa3004492a8d6c9ba4aebeb1b81b1f6a3">CDescriptorExamples::PackageBuffers</a>()
<a name="l00421"></a>00421 {
<a name="l00422"></a>00422 TPtr output( iViewer-><a class="code" href="class_m_result_viewer.html#a30d7e86bbb78ba769648736a9ee9e62d">GetViewBuffer</a>() );
<a name="l00423"></a>00423 <span class="comment">// ------------------------------------------------------------</span>
<a name="l00424"></a>00424 <span class="comment">// This first example demonstrates how package buffer is used to</span>
<a name="l00425"></a>00425 <span class="comment">// pack a value class inside.</span>
<a name="l00426"></a>00426 RenderHeader( _L( <span class="stringliteral">"PackageBuffers:TPckgBuf"</span> ), output );
<a name="l00427"></a>00427
<a name="l00428"></a>00428 <span class="comment">// construct package buffer that does store one instance of TExample</span>
<a name="l00429"></a>00429 <span class="comment">// instance. The insnce inside is empty since constructor of package</span>
<a name="l00430"></a>00430 <span class="comment">// buffer does call also the constructor of capsulated object</span>
<a name="l00431"></a>00431 <span class="comment">// (constructor of TExample in that case that sets fields to empty).</span>
<a name="l00432"></a>00432 TPckgBuf<TExample> pckgBuf;
<a name="l00433"></a>00433 output.Append( _L(<span class="stringliteral">"\nCreated package buffer that stores an empty (by default) TExample object\n"</span>) );
<a name="l00434"></a>00434
<a name="l00435"></a>00435 ShowContents( pckgBuf, output );
<a name="l00436"></a>00436
<a name="l00437"></a>00437 <span class="comment">// modify TExample inside package buffer.</span>
<a name="l00438"></a>00438 <span class="comment">//</span>
<a name="l00439"></a>00439 <span class="comment">// To get access to the instance, operator () is used to get</span>
<a name="l00440"></a>00440 <span class="comment">// reference.</span>
<a name="l00441"></a>00441 TExample &exampleRef = pckgBuf();
<a name="l00442"></a>00442 exampleRef.iNumber = 1234567;
<a name="l00443"></a>00443 output.Append( _L(<span class="stringliteral">"\nModified iNumber of TExample inside package buffer\n"</span>) );
<a name="l00444"></a>00444 ShowContents( pckgBuf, output );
<a name="l00445"></a>00445
<a name="l00446"></a>00446 <span class="comment">// modify TExample inside package buffer - using existing reference</span>
<a name="l00447"></a>00447 exampleRef.iText.Copy( _L( <span class="stringliteral">"Hello!"</span> ) );
<a name="l00448"></a>00448 output.Append( _L(<span class="stringliteral">"\nModified iText of TExample inside package buffer\n"</span>) );
<a name="l00449"></a>00449 ShowContents( pckgBuf, output );
<a name="l00450"></a>00450
<a name="l00451"></a>00451 <span class="comment">// ------------------------------------------------------------</span>
<a name="l00452"></a>00452 <span class="comment">// This second example demonstrates how package buffer pointer is</span>
<a name="l00453"></a>00453 <span class="comment">// used to refer contenst of value class somewhere in memory.</span>
<a name="l00454"></a>00454 RenderHeader( _L( <span class="stringliteral">"PackageBuffers:TPckg"</span> ), output );
<a name="l00455"></a>00455
<a name="l00456"></a>00456 TExample example;
<a name="l00457"></a>00457 TPckg<TExample> pckg( example );
<a name="l00458"></a>00458 output.Append( _L(<span class="stringliteral">"\nCreated package buffer that refers to an empty TExample object\n"</span>) );
<a name="l00459"></a>00459 ShowContents(pckg, output);
<a name="l00460"></a>00460
<a name="l00461"></a>00461 <span class="comment">// modify contents the example object. Showing contents of package</span>
<a name="l00462"></a>00462 <span class="comment">// buffer reveals that package buffer did refer to our external</span>
<a name="l00463"></a>00463 <span class="comment">// instance.</span>
<a name="l00464"></a>00464 example.iNumber = 12345;
<a name="l00465"></a>00465 example.iText.Copy( _L( <span class="stringliteral">"Hello!"</span> ) );
<a name="l00466"></a>00466 output.Append( _L(<span class="stringliteral">"\nCreated package buffer that refers to an empty TExample object\n"</span>) );
<a name="l00467"></a>00467 ShowContents(pckg, output);
<a name="l00468"></a>00468
<a name="l00469"></a>00469 iViewer-><a class="code" href="class_m_result_viewer.html#a8e10673e2504a4af6382f26794bb8004">UpdateView</a>();
<a name="l00470"></a>00470 }
<a name="l00471"></a>00471
<a name="l00472"></a><a class="code" href="class_c_descriptor_examples.html#a0c138dfa0a2aa25627963b9fee1b63d5">00472</a> <span class="keywordtype">void</span> <a class="code" href="class_c_descriptor_examples.html#a0c138dfa0a2aa25627963b9fee1b63d5">CDescriptorExamples::RBufDemonstrations</a>()
<a name="l00473"></a>00473 {
<a name="l00474"></a>00474 <span class="comment">// RBuf::CreateL demo</span>
<a name="l00475"></a>00475 RBuf modifiableBuf;
<a name="l00476"></a>00476 modifiableBuf.CreateL(12);
<a name="l00477"></a>00477 ASSERT(modifiableBuf.Length()==0);
<a name="l00478"></a>00478 ASSERT(modifiableBuf.MaxLength()==12);
<a name="l00479"></a>00479 modifiableBuf.Close();
<a name="l00480"></a>00480
<a name="l00481"></a>00481 <span class="comment">// RBuf::CreateMaxL demo</span>
<a name="l00482"></a>00482 modifiableBuf.CreateMaxL(12);
<a name="l00483"></a>00483 ASSERT(modifiableBuf.Length()==12);
<a name="l00484"></a>00484 ASSERT(modifiableBuf.MaxLength()==12);
<a name="l00485"></a>00485 modifiableBuf.Close();
<a name="l00486"></a>00486
<a name="l00487"></a>00487 <span class="comment">// RBuf::CreateL passing in a descriptor</span>
<a name="l00488"></a>00488 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KHelloWorld, <span class="stringliteral">"Hello World"</span>);
<a name="l00489"></a>00489 modifiableBuf.CreateL(KHelloWorld());
<a name="l00490"></a>00490 ASSERT(modifiableBuf.Length()==11);
<a name="l00491"></a>00491 ASSERT(modifiableBuf.MaxLength()==11);
<a name="l00492"></a>00492 modifiableBuf.Close();
<a name="l00493"></a>00493
<a name="l00494"></a>00494 <span class="comment">// RBuf::CreateL passing in a descriptor and a maximum length</span>
<a name="l00495"></a>00495 modifiableBuf.CreateL(KHelloWorld(), 15);
<a name="l00496"></a>00496 ASSERT(modifiableBuf.Length()==11);
<a name="l00497"></a>00497 ASSERT(modifiableBuf.MaxLength()==15);
<a name="l00498"></a>00498 modifiableBuf.Close();
<a name="l00499"></a>00499
<a name="l00500"></a>00500 <span class="comment">// RBuf::CreateL and ReAllocL & modifiable descriptor base class methods</span>
<a name="l00501"></a>00501 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KHello, <span class="stringliteral">"Hello"</span>);
<a name="l00502"></a>00502 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KWorld, <span class="stringliteral">" World"</span>);
<a name="l00503"></a>00503 modifiableBuf.CreateL(5);
<a name="l00504"></a>00504 modifiableBuf.Copy(KHello());
<a name="l00505"></a>00505 modifiableBuf.CleanupClosePushL(); <span class="comment">// Push onto cleanup stack for leave safety</span>
<a name="l00506"></a>00506 modifiableBuf.ReAllocL(11);
<a name="l00507"></a>00507 modifiableBuf.Append(KWorld);
<a name="l00508"></a>00508 CleanupStack::PopAndDestroy(); <span class="comment">// Calls modifiableBuf.Close()</span>
<a name="l00509"></a>00509
<a name="l00510"></a>00510 <span class="comment">//RBuf::Assign leaks easily.</span>
<a name="l00511"></a>00511 <span class="comment">//If you have memory allocated in the RBuf and you call Assign it leaks.</span>
<a name="l00512"></a>00512 <span class="comment">//You should always call Close() before calling Assign()</span>
<a name="l00513"></a>00513 <span class="comment">//The same goes with Create functions, if there's memory allocated it leaks.</span>
<a name="l00514"></a>00514 <span class="comment">//modifiableBuf.CreateL(1); </span>
<a name="l00515"></a>00515 <span class="comment">//modifiableBuf.Close();</span>
<a name="l00516"></a>00516 HBufC* hBuf = KHello().AllocL();
<a name="l00517"></a>00517 modifiableBuf.Assign(hBuf); <span class="comment">//Take ownership of hBuf memory</span>
<a name="l00518"></a>00518 ASSERT(modifiableBuf.Length()==5);
<a name="l00519"></a>00519 modifiableBuf.Close();
<a name="l00520"></a>00520
<a name="l00521"></a>00521 <span class="comment">//Assignments demo</span>
<a name="l00522"></a>00522 RBuf myRBuf1;
<a name="l00523"></a>00523 RBuf myRBuf2;
<a name="l00524"></a>00524 HBufC* myHBufC = HBufC::NewL(20);
<a name="l00525"></a>00525 myRBuf1.Assign(myHBufC); <span class="comment">//Take ownership of heap memory</span>
<a name="l00526"></a>00526 myRBuf2.Assign(myRBuf1); <span class="comment">//Take ownership of another RBuf</span>
<a name="l00527"></a>00527 myRBuf2.Close();
<a name="l00528"></a>00528
<a name="l00529"></a>00529 <span class="comment">//Assign, ReAllocL and Append</span>
<a name="l00530"></a>00530 TUint16* ptr = <span class="keyword">static_cast<</span>TUint16*<span class="keyword">></span> (User::AllocL(5*<span class="keyword">sizeof</span>(TText)));
<a name="l00531"></a>00531 modifiableBuf.Assign(ptr,5);
<a name="l00532"></a>00532 ASSERT(modifiableBuf.Length()==0);
<a name="l00533"></a>00533 modifiableBuf.Copy(KHello()); <span class="comment">//Copying any more would panic</span>
<a name="l00534"></a>00534 <span class="comment">//modifiableBuf.Append(KWorld);//This would cause a panic</span>
<a name="l00535"></a>00535
<a name="l00536"></a>00536 modifiableBuf.CleanupClosePushL(); <span class="comment">//Push onto cleanup stack for leave safety</span>
<a name="l00537"></a>00537 modifiableBuf.ReAllocL(12);
<a name="l00538"></a>00538 modifiableBuf.Append(KWorld);
<a name="l00539"></a>00539 CleanupStack::PopAndDestroy(); <span class="comment">//Calls modifiableBuf.Close() </span>
<a name="l00540"></a>00540 }
<a name="l00541"></a>00541
<a name="l00542"></a>00542 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00543"></a>00543 <span class="comment">// Implementation of the example class</span>
<a name="l00544"></a>00544 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00545"></a>00545 TExample::TExample(TInt aNumber, <span class="keyword">const</span> TDesC &aText)
<a name="l00546"></a>00546 {
<a name="l00547"></a>00547 iNumber = aNumber;
<a name="l00548"></a>00548 iText.Copy(aText.Left( iText.MaxLength() ) );
<a name="l00549"></a>00549 }
<a name="l00550"></a>00550
<a name="l00551"></a>00551 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00552"></a>00552 <span class="comment">// Implementation of the helper functions</span>
<a name="l00553"></a>00553 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00554"></a>00554 LOCAL_C <span class="keywordtype">void</span> ShowContents(<span class="keyword">const</span> TDesC& aMsg,
<a name="l00555"></a>00555 <span class="keyword">const</span> TExample aExample,
<a name="l00556"></a>00556 TPtr &aOutput)
<a name="l00557"></a>00557 {
<a name="l00558"></a>00558 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>( KFormat, <span class="stringliteral">"%S: %d, \"%S\"\n"</span> );
<a name="l00559"></a>00559 aOutput.AppendFormat( KFormat, &aMsg, aExample.iNumber, &aExample.iText );
<a name="l00560"></a>00560 }
<a name="l00561"></a>00561
<a name="l00562"></a>00562 LOCAL_C <span class="keywordtype">void</span> ShowContents(<span class="keyword">const</span> TDesC& aMsg, <span class="keyword">const</span> TDesC &aTxt, TPtr &aOutput)
<a name="l00563"></a>00563 {
<a name="l00564"></a>00564 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>( KFormat, <span class="stringliteral">"%S: \"%S\"\n"</span> );
<a name="l00565"></a>00565 aOutput.AppendFormat( KFormat, &aMsg, &aTxt );
<a name="l00566"></a>00566 }
<a name="l00567"></a>00567
<a name="l00568"></a>00568 LOCAL_C <span class="keywordtype">void</span> ShowContents(<span class="keyword">const</span> TDesC& aMsg, <span class="keyword">const</span> TDesC8 &aTxt, TPtr &aOutput)
<a name="l00569"></a>00569 {
<a name="l00570"></a>00570 TBuf<128> buf;
<a name="l00571"></a>00571 buf.Copy(aTxt.Left(buf.MaxLength()));
<a name="l00572"></a>00572 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>( KFormat, <span class="stringliteral">"%S: \"%S\"\n"</span> );
<a name="l00573"></a>00573 aOutput.AppendFormat( KFormat, &aMsg, &buf );
<a name="l00574"></a>00574 }
<a name="l00575"></a>00575
<a name="l00576"></a>00576 <span class="keyword">template</span> <<span class="keyword">class</span> T>
<a name="l00577"></a>00577 LOCAL_C <span class="keywordtype">void</span> ShowContents(CCirBuf<T> *aFIFO, TPtr &aOutput)
<a name="l00578"></a>00578 {
<a name="l00579"></a>00579 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>( KFIFOFormat, <span class="stringliteral">"fifo: size=%d, max=%d\n"</span> );
<a name="l00580"></a>00580 aOutput.AppendFormat( KFIFOFormat, aFIFO->Count(), aFIFO->Length() );
<a name="l00581"></a>00581 }
<a name="l00582"></a>00582
<a name="l00583"></a>00583 LOCAL_C <span class="keywordtype">void</span> ShowBuf(CBufFlat &aBuf, TDes &aOutput)
<a name="l00584"></a>00584 {
<a name="l00585"></a>00585 TPtrC8 data = aBuf.Ptr(0);
<a name="l00586"></a>00586 aOutput.AppendFormat( _L(<span class="stringliteral">"CBufFlat: size=%d, data @%d=\n\""</span>), aBuf.Size(), data.Ptr() );
<a name="l00587"></a>00587 Append(data, aOutput);
<a name="l00588"></a>00588 aOutput.Append(_L(<span class="stringliteral">"\"\n"</span>));
<a name="l00589"></a>00589 }
<a name="l00590"></a>00590
<a name="l00591"></a>00591 LOCAL_C <span class="keywordtype">void</span> ShowBuf(CBufSeg &aBuf, TDes &aOutput)
<a name="l00592"></a>00592 {
<a name="l00593"></a>00593 aOutput.AppendFormat( _L(<span class="stringliteral">"CBufSeg: size=%d, segments=\n"</span>), aBuf.Size() );
<a name="l00594"></a>00594 TInt pos = 0;
<a name="l00595"></a>00595 <span class="keywordflow">while</span>( pos < aBuf.Size() )
<a name="l00596"></a>00596 {
<a name="l00597"></a>00597 TPtrC8 ptr = aBuf.Ptr(pos);
<a name="l00598"></a>00598 aOutput.Append( _L(<span class="stringliteral">" \""</span>) );
<a name="l00599"></a>00599 Append(ptr, aOutput);
<a name="l00600"></a>00600 aOutput.AppendFormat( _L(<span class="stringliteral">"\" @%d\n"</span>), ptr.Ptr() );
<a name="l00601"></a>00601 pos += ptr.Length();
<a name="l00602"></a>00602 }
<a name="l00603"></a>00603 }
<a name="l00604"></a>00604
<a name="l00605"></a>00605 LOCAL_C <span class="keywordtype">void</span> ShowContents(TPckgBuf<TExample> &aPackageBuf, TPtr &aOutput)
<a name="l00606"></a>00606 {
<a name="l00607"></a>00607 aOutput.AppendFormat( _L( <span class="stringliteral">"TPckgBuf @%d, sizeof=%d, storing\n TExample @%d, sizeof=%d, iNumber=%d, iText=\"%S\"\n"</span> ),
<a name="l00608"></a>00608 &aPackageBuf, <span class="keyword">sizeof</span>(aPackageBuf), &aPackageBuf(), <span class="keyword">sizeof</span>(aPackageBuf()), aPackageBuf().iNumber, &aPackageBuf().iText );
<a name="l00609"></a>00609 }
<a name="l00610"></a>00610
<a name="l00611"></a>00611 LOCAL_C <span class="keywordtype">void</span> ShowContents(TPckg<TExample> &aPackage, TPtr &aOutput)
<a name="l00612"></a>00612 {
<a name="l00613"></a>00613 aOutput.AppendFormat( _L( <span class="stringliteral">"TPckg @%d, sizeof=%d, referring to\n TExample @%d, sizeof=%d, iNumber=%d, iText=\"%S\"\n"</span> ),
<a name="l00614"></a>00614 &aPackage, <span class="keyword">sizeof</span>(aPackage), &aPackage(), <span class="keyword">sizeof</span>(aPackage()), aPackage().iNumber, &aPackage().iText );
<a name="l00615"></a>00615 }
<a name="l00616"></a>00616
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