author | hgs |
Wed, 13 Oct 2010 19:39:18 +0530 | |
changeset 71 | 28ccaba883f4 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// Implements the default CDefaultResolver class. |
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// |
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// |
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|
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/** |
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@file |
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@internalComponent |
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*/ |
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|
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#include <ecom/ecom.h> |
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#include <ecom/ecomerrorcodes.h> |
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#include <ecom/ecomresolverparams.h> |
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#include <ecom/implementationinformation.h> |
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|
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#include "TestUtilities.h" // For __FILE__LINE__ |
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#include "DefaultResolver.h" |
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CDefaultResolver* CDefaultResolver::NewL(MPublicRegistry& aRegistry) |
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{ |
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return new(ELeave) CDefaultResolver(aRegistry); |
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} |
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// Default d'tor |
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CDefaultResolver::~CDefaultResolver() |
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{ |
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} |
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// Default c'tor |
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CDefaultResolver::CDefaultResolver(MPublicRegistry& aRegistry) |
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: CResolver(aRegistry) |
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{ |
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// Do nothing here |
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} |
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TUid CDefaultResolver::IdentifyImplementationL(TUid aInterfaceUid, |
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const TEComResolverParams& aAdditionalParameters) const |
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{ |
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RImplInfoArray* implementationsInfo = ListAllL(aInterfaceUid, aAdditionalParameters); |
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TUid found = Resolve(*implementationsInfo, aAdditionalParameters); |
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implementationsInfo->Reset(); |
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delete implementationsInfo; |
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return found; |
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} |
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TUid CDefaultResolver::Resolve(const RImplInfoArray& aImplementationsInfo, |
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const TEComResolverParams& aAdditionalParameters) const |
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{ |
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// Place to store the result if we get a wildcard match |
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TUid wildMatched = KNullUid; |
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TInt wildConfidence = KErrNotFound; |
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const TDesC8& matchType = aAdditionalParameters.DataType(); |
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// Loop through the implementations matching on type |
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const TInt count = aImplementationsInfo.Count(); |
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TBool isGenericMatch=aAdditionalParameters.IsGenericMatch(); |
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for(TInt index = 0; index < count; ++index) |
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{ |
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const CImplementationInformation& impData = *aImplementationsInfo[index]; |
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const TDesC8& dataType = impData.DataType(); |
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// As soon as we get a match on the datatype then return uid of the |
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// implementation found. |
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if(Match(dataType, // The Datatype of this implementation |
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matchType, // The type we are trying to find |
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EFalse)) // Don't use wildcards first |
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{ |
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// We have got an exact match so return this |
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return impData.ImplementationUid(); |
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} |
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else if(isGenericMatch) // If the client wants us to use wildcards |
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{ |
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if(Match(dataType, |
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matchType, |
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ETrue)) |
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{ |
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// We have matched using wildcards so work out a confidence value |
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TInt confidence = 0; |
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TInt length = Min(matchType.Length(), dataType.Length()); |
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while((matchType[confidence] == dataType[confidence]) && |
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(++confidence < length)) |
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{ |
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} |
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if(confidence > wildConfidence) |
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{ |
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wildConfidence = confidence; |
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wildMatched = impData.ImplementationUid(); |
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} |
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} |
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} |
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} |
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108 |
|
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return wildMatched; |
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} |
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111 |
|
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void CloseAndDeleteRArray(TAny* aObject) |
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{ |
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RImplInfoArray* array=reinterpret_cast<RImplInfoArray*>(aObject); |
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if (array) |
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array->Close(); |
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delete array; |
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} |
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119 |
|
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120 |
|
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RImplInfoArray* CDefaultResolver::ListAllL(TUid aInterfaceUid, |
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const TEComResolverParams& aAdditionalParameters) const |
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{ |
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// Use the member var to create the array so that we get proper cleanup behaviour |
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RImplInfoArray* retList = new (ELeave) RImplInfoArray; |
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126 |
|
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CleanupStack::PushL(TCleanupItem(CloseAndDeleteRArray,retList)); |
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RImplInfoArray& fullList = iRegistry.ListImplementationsL(aInterfaceUid); |
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129 |
|
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const TBool useWildcards = aAdditionalParameters.IsGenericMatch(); |
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const TDesC8& matchType = aAdditionalParameters.DataType(); |
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const TInt numImps = fullList.Count(); |
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for(TInt index = 0; index < numImps; ++index) |
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{ |
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if(Match(fullList[index]->DataType(), matchType, useWildcards)) |
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{ |
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User::LeaveIfError(retList->Append(fullList[index])); |
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} |
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} |
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140 |
|
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// Reset the member variable because we are passing ownership back |
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CleanupStack::Pop(); |
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return retList; |
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} |
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145 |
|
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TBool CDefaultResolver::Match(const TDesC8& aImplementationType, |
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const TDesC8& aMatchType, |
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TBool aUseWildcards) const |
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{ |
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// In this function if allowing wildcards then TDesC8::Match is used which returns |
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// the position of the match or KErrNotFound |
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// If not allowing wildcards then TDesC8::Compare is used which returns a TInt which |
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// indicates if one descriptor is bigger than the other (0 if they are identical) |
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154 |
|
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TBool gotMatch = ETrue; |
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156 |
|
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if(aMatchType.Length()!=0) |
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158 |
{ |
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gotMatch = EFalse; |
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160 |
|
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_LIT8(dataSeparator, "||"); |
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const TInt separatorLength = dataSeparator().Length(); |
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163 |
|
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// Look for the section separator marker '||' |
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TInt separatorPos = aImplementationType.Find(dataSeparator); |
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if(separatorPos == KErrNotFound) |
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167 |
{ |
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// Match against the whole string |
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if(aUseWildcards) |
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gotMatch = aMatchType.Match(aImplementationType) != KErrNotFound; |
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171 |
else |
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gotMatch = aMatchType.Compare(aImplementationType) == 0; |
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} |
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174 |
else |
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175 |
{ |
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// Find the first section, up to the separator |
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TPtrC8 dataSection = aImplementationType.Left(separatorPos); |
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TPtrC8 remainingData = aImplementationType.Mid(separatorPos + separatorLength); |
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// Match against each section in turn |
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while(separatorPos != KErrNotFound) |
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181 |
{ |
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// Search this section |
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if(aUseWildcards) |
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gotMatch = aMatchType.Match(dataSection) != KErrNotFound; |
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185 |
else |
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gotMatch = aMatchType.Compare(dataSection) == 0; |
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187 |
|
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// If we found it then no need to continue, so return |
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if(gotMatch) |
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return ETrue; |
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191 |
|
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192 |
// Move on to the next section |
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separatorPos = remainingData.Find(dataSeparator); |
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if(separatorPos != KErrNotFound) |
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195 |
{ |
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196 |
dataSection.Set(remainingData.Left(separatorPos)); |
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197 |
remainingData.Set(remainingData.Mid(separatorPos + separatorLength)); |
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198 |
} |
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199 |
else |
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200 |
dataSection.Set(remainingData); |
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201 |
} |
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202 |
|
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203 |
// Check the final part |
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if(aUseWildcards) |
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gotMatch = aMatchType.Match(dataSection) != KErrNotFound; |
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206 |
else |
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207 |
gotMatch = aMatchType.Compare(dataSection) == 0; |
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} |
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209 |
} |
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210 |
return gotMatch; |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
211 |
} |