Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/secureserverccountsubsession_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/Base/IPC/secureserver/secureserverccountsubsession.cpp</h1><a href="secureserverccountsubsession_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>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
<a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span>
<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
<a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
<a name="l00010"></a>00010 <span class="comment">//</span>
<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Description:</span>
<a name="l00014"></a>00014 <span class="comment">// Contains the implementation of functions described in the CSecureServerSubSession class.</span>
<a name="l00015"></a>00015 <span class="comment">//</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017
<a name="l00018"></a>00018
<a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="secureclientandserver_8h.html">secureclientandserver.h</a>"</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="secureserver_8h.html">secureserver.h</a>"</span>
<a name="l00024"></a>00024
<a name="l00030"></a><a class="code" href="class_c_secure_server_sub_session.html#a5303b3bc024108cd70a7f331e2052672">00030</a> <a class="code" href="class_c_secure_server_sub_session.html#a5303b3bc024108cd70a7f331e2052672">CSecureServerSubSession::CSecureServerSubSession</a>(<a class="code" href="class_c_secure_server_session.html">CSecureServerSession</a>* aSession) : iSession(aSession)
<a name="l00031"></a>00031 {
<a name="l00032"></a>00032 }
<a name="l00033"></a>00033
<a name="l00038"></a><a class="code" href="class_c_secure_server_sub_session.html#a97ed872aae87b8cb76d6fa101a52303f">00038</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#a97ed872aae87b8cb76d6fa101a52303f">CSecureServerSubSession::SetFromStringL</a>(<span class="keyword">const</span> RMessage2& aMessage)
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 TInt deslen = aMessage.GetDesLength(0);
<a name="l00041"></a>00041 RBuf buffer;
<a name="l00042"></a>00042
<a name="l00043"></a>00043 buffer.CreateL(deslen);
<a name="l00044"></a>00044 buffer.CleanupClosePushL();
<a name="l00045"></a>00045 <span class="comment">// The descriptor is encapsulated in the 0th offset of aMessage.</span>
<a name="l00046"></a>00046 <span class="comment">// Hence, read the 0th offset of the message to the buffer.</span>
<a name="l00047"></a>00047 aMessage.ReadL(0,buffer,0);
<a name="l00048"></a>00048 <span class="comment">// Check for empty string.</span>
<a name="l00049"></a>00049 <span class="keywordflow">if</span> (buffer.Length() == 0)
<a name="l00050"></a>00050 {
<a name="l00051"></a>00051 User::Leave(<a class="code" href="secureclientandserver_8h.html#ac31a03d737c6ab16ba55ceab73d57b71ae3a6b8e17c25d02a3ae9ca7362ba4d0c">ENonNumericString</a>);
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053 TLex16 lexer;
<a name="l00054"></a>00054 lexer.Assign(buffer);
<a name="l00055"></a>00055 <span class="keywordflow">while</span> (!lexer.Eos())
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057 TChar thechar;
<a name="l00058"></a>00058 thechar = lexer.Peek();
<a name="l00059"></a>00059 <span class="comment">// Check for non numeric character.</span>
<a name="l00060"></a>00060 <span class="keywordflow">if</span> (!thechar.IsDigit())
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 User::Leave(<a class="code" href="secureclientandserver_8h.html#ac31a03d737c6ab16ba55ceab73d57b71ae3a6b8e17c25d02a3ae9ca7362ba4d0c">ENonNumericString</a>);
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064 lexer.Inc();
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066 lexer.Assign(buffer);
<a name="l00067"></a>00067 <span class="keywordflow">if</span> (lexer.Val(iCount))
<a name="l00068"></a>00068 {
<a name="l00069"></a>00069 User::Leave(<a class="code" href="secureclientandserver_8h.html#ac31a03d737c6ab16ba55ceab73d57b71ae3a6b8e17c25d02a3ae9ca7362ba4d0c">ENonNumericString</a>);
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071 CleanupStack::PopAndDestroy();
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073
<a name="l00077"></a><a class="code" href="class_c_secure_server_sub_session.html#a388299f02880acd81521b12ea68fb6ba">00077</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#a388299f02880acd81521b12ea68fb6ba">CSecureServerSubSession::Increase</a>()
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079 iCount ++;
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081
<a name="l00087"></a><a class="code" href="class_c_secure_server_sub_session.html#a2de0131772c586accbd61fb2ed329647">00087</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#a2de0131772c586accbd61fb2ed329647">CSecureServerSubSession::IncreaseBy</a>(<span class="keyword">const</span> RMessage2& aMessage)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 iCount += aMessage.Int0();
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00095"></a><a class="code" href="class_c_secure_server_sub_session.html#ac9e4188e16b286e4ed6cbd1cce24a42e">00095</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#ac9e4188e16b286e4ed6cbd1cce24a42e">CSecureServerSubSession::Decrease</a>()
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 iCount --;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00105"></a><a class="code" href="class_c_secure_server_sub_session.html#aaee3504a264b7c7136660201bf143a6d">00105</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#aaee3504a264b7c7136660201bf143a6d">CSecureServerSubSession::DecreaseBy</a>(<span class="keyword">const</span> RMessage2& aMessage)
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107 iCount -= aMessage.Int0();
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00114"></a><a class="code" href="class_c_secure_server_sub_session.html#a5ffe759ade87ebaeea7e2399d65b07e5">00114</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#a5ffe759ade87ebaeea7e2399d65b07e5">CSecureServerSubSession::Reset</a>()
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 iCount = 0;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00123"></a><a class="code" href="class_c_secure_server_sub_session.html#a3edaea36ff8bb03d5814b4aa245b761a">00123</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#a3edaea36ff8bb03d5814b4aa245b761a">CSecureServerSubSession::CounterValueL</a>(<span class="keyword">const</span> RMessage2& aMessage)
<a name="l00124"></a>00124 {
<a name="l00125"></a>00125 <span class="comment">// Write the value of counter to the 0th offset of aMessage by converting it to a package.</span>
<a name="l00126"></a>00126 TPckgBuf<TInt> p(iCount);
<a name="l00127"></a>00127 aMessage.WriteL(0,p);
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129
<a name="l00142"></a><a class="code" href="class_c_secure_server_sub_session.html#a5a58cd7db75221072f5ef4251fe75a82">00142</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#a5a58cd7db75221072f5ef4251fe75a82">CSecureServerSubSession::SaveCounterValueL</a>()
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 RFs fs;
<a name="l00145"></a>00145 User::LeaveIfError(fs.Connect());
<a name="l00146"></a>00146 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFileName,<span class="stringliteral">"counter.dat"</span>);
<a name="l00147"></a>00147 User::LeaveIfError(fs.CreatePrivatePath(RFs::GetSystemDrive()));
<a name="l00148"></a>00148 User::LeaveIfError(fs.SetSessionToPrivate(RFs::GetSystemDrive()));
<a name="l00149"></a>00149 TFileName thePath;
<a name="l00150"></a>00150 User::LeaveIfError(fs.PrivatePath(thePath));
<a name="l00151"></a>00151 TInt err=fs.MkDir(thePath);
<a name="l00152"></a>00152 <span class="keywordflow">if</span> (err!=KErrAlreadyExists)
<a name="l00153"></a>00153 {
<a name="l00154"></a>00154 User::LeaveIfError(err);
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156 thePath.Append(KFileName);
<a name="l00157"></a>00157 RFile file;
<a name="l00158"></a>00158
<a name="l00159"></a>00159 TBuf8<20> counterVal;
<a name="l00160"></a>00160 counterVal.FillZ();
<a name="l00161"></a>00161 <span class="comment">// Append the counter value to a buffer and write to the file.</span>
<a name="l00162"></a>00162 counterVal.AppendNum(iCount);
<a name="l00163"></a>00163 User::LeaveIfError(file.Replace(fs,thePath,EFileWrite));
<a name="l00164"></a>00164 User::LeaveIfError(file.Write(counterVal));
<a name="l00165"></a>00165 User::LeaveIfError(file.Flush());
<a name="l00166"></a>00166
<a name="l00167"></a>00167 file.Close();
<a name="l00168"></a>00168 fs.Close();
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170
<a name="l00175"></a><a class="code" href="class_c_secure_server_sub_session.html#a234065b99df276eca6097ab3d89cc81a">00175</a> <span class="keywordtype">void</span> <a class="code" href="class_c_secure_server_sub_session.html#a234065b99df276eca6097ab3d89cc81a">CSecureServerSubSession::SetCounterValueFromFileL</a>()
<a name="l00176"></a>00176 {
<a name="l00177"></a>00177 RFs fs;
<a name="l00178"></a>00178 User::LeaveIfError(fs.Connect());
<a name="l00179"></a>00179 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFileName,<span class="stringliteral">"counter.dat"</span>);
<a name="l00180"></a>00180 User::LeaveIfError(fs.CreatePrivatePath(RFs::GetSystemDrive()));
<a name="l00181"></a>00181 User::LeaveIfError(fs.SetSessionToPrivate(RFs::GetSystemDrive()));
<a name="l00182"></a>00182 TFileName thePath;
<a name="l00183"></a>00183 User::LeaveIfError(fs.PrivatePath(thePath));
<a name="l00184"></a>00184 TInt err=fs.MkDir(thePath);
<a name="l00185"></a>00185 <span class="keywordflow">if</span> (err!=KErrAlreadyExists)
<a name="l00186"></a>00186 {
<a name="l00187"></a>00187 User::LeaveIfError(err);
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189 thePath.Append(KFileName);
<a name="l00190"></a>00190 RFile file;
<a name="l00191"></a>00191
<a name="l00192"></a>00192 TBuf8<20> readVal;
<a name="l00193"></a>00193 User::LeaveIfError(file.Open(fs,thePath,EFileRead));
<a name="l00194"></a>00194 <span class="comment">// Read counter value to the readVal buffer.</span>
<a name="l00195"></a>00195 User::LeaveIfError(file.Read(readVal));
<a name="l00196"></a>00196 file.Close();
<a name="l00197"></a>00197 <span class="comment">// Convert value in readVal to TInt.</span>
<a name="l00198"></a>00198 TLex8 lex(readVal);
<a name="l00199"></a>00199 lex.Val(iCount);
<a name="l00200"></a>00200
<a name="l00201"></a>00201 fs.Close();
<a name="l00202"></a>00202 }
</pre></div></div>
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