--- a/sysstatemgmt/syslangutil/src/syslangutil.cpp	Thu Aug 19 11:09:10 2010 +0300
+++ b/sysstatemgmt/syslangutil/src/syslangutil.cpp	Tue Aug 31 16:29:05 2010 +0300
@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
+* Copyright (c) 2009 - 2010 Nokia Corporation and/or its subsidiary(-ies). 
 * All rights reserved.
 * This component and the accompanying materials are made available
 * under the terms of "Eclipse Public License v1.0"
@@ -23,16 +23,25 @@
 #include "syslangutiltrace.h"
 #include "ssmmapperutilitystatic.h"
 #include "syslangutilprivatecrkeys.h"
+#include "ssmcommonlocale.h"
+#include <CommonEngineDomainCRKeys.h>
 
 const TInt KReadBufSize = 10;
-const TInt KLangArraySize = 20;
+const TInt KLangArraySize = 10;
+//Maximum number of retries for starting cenrep transaction.
+const TInt KMaxCountForReiteration = 5;
 
 // R&D support: Use language file in Starters internal directory for module
 // testing purposes.
 #ifdef __STARTER_MODULE_TEST_SUPPORT__
   _LIT( KLanguagesIni, "C:\\private\\100059C9\\languages.txt" );
+  _LIT( KRegionsIni, "C:\\private\\100059C9\\regions.txt" );
+  _LIT( KCollationsIni, "C:\\private\\100059C9\\collations.txt" );
+  
 #else // __STARTER_MODULE_TEST_SUPPORT__
   _LIT( KLanguagesIni, "z:\\resource\\bootdata\\languages.txt" );
+  _LIT( KRegionsIni, "z:\\resource\\bootdata\\regions.txt" );
+  _LIT( KCollationsIni, "z:\\resource\\bootdata\\collations.txt" );
 #endif // __STARTER_MODULE_TEST_SUPPORT__
 
 // ============================ MEMBER FUNCTIONS ===============================
@@ -351,3 +360,172 @@
     FUNC_EXIT_TRACE;
     return aRFs;
     }
+
+// -----------------------------------------------------------------------------
+// SysLangUtil::ChangeLanguage
+//
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt SysLangUtil::ChangeLanguage(const TInt  aLanguageCode)
+	{
+    API_FUNC_ENTRY_TRACE;    
+    TRAPD( errorCode, LoadDllL( KGSDisplayTxtLang,aLanguageCode, KLanguageDllNameBase ) );      
+    FUNC_EXIT_RET_TRACE( errorCode );
+    return errorCode;	 
+	}
+
+
+// -----------------------------------------------------------------------------
+// SysLangUtil::ChangeRegion
+//
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt SysLangUtil::ChangeRegion(const TInt aRegionCode)
+	{
+    API_FUNC_ENTRY_TRACE;
+    TRAPD( errorCode, LoadDllL( KGSRegion, aRegionCode, KRegionDllNameBase ) );     
+    FUNC_EXIT_RET_TRACE( errorCode );
+    return errorCode;
+	}
+
+// -----------------------------------------------------------------------------
+// SysLangUtil::ChangeCollation
+//
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt SysLangUtil::ChangeCollation(const TInt aCollationCode)
+	{
+    API_FUNC_ENTRY_TRACE; 
+    TRAPD( errorCode, LoadDllL( KGSCollation, aCollationCode, KCollationDllNameBase ) );      
+    FUNC_EXIT_RET_TRACE( errorCode );
+    return errorCode;
+	}
+	
+
+// -----------------------------------------------------------------------------
+// SysLangUtil::GetInstalledRegions
+//
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt SysLangUtil::GetInstalledRegions(CArrayFixFlat<TInt>*& aRegions,  RFs* aFileServerSession )
+	{
+	API_FUNC_ENTRY_TRACE;	
+	TRAPD(err, ReadFileL(aRegions, KRegionsIni, aFileServerSession ));
+	FUNC_EXIT_RET_TRACE( err );
+	return err;
+	}
+
+// -----------------------------------------------------------------------------
+// SysLangUtil::GetInstalledCollations
+//
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt SysLangUtil::GetInstalledCollations(CArrayFixFlat<TInt>*& aCollations,  RFs* aFileServerSession )
+	{
+	API_FUNC_ENTRY_TRACE;
+	TRAPD(err, ReadFileL(aCollations,  KCollationsIni, aFileServerSession ));
+	FUNC_EXIT_RET_TRACE( err );  
+	return err;	
+	}
+
+void SysLangUtil::LoadDllL( const TUint32 aCategory,const TInt aCode, const TDesC& aDllNameBase )
+    {
+    CRepository* cenrep = NULL; 
+    TUint32 keyInfo;
+    cenrep = CRepository::NewLC( KCRUidCommonEngineKeys );
+    
+    // Re-iterate through StartTransaction, if errorCode returned is KErrLocked
+    TInt errorCode = KErrLocked;
+	//Counter to restrict re-iteration. 
+	TInt counter = KMaxCountForReiteration;
+    while ( KErrLocked == errorCode && counter > 0 )
+        {
+        errorCode = cenrep->StartTransaction(CRepository::EConcurrentReadWriteTransaction);
+		--counter;
+        }
+    User::LeaveIfError(errorCode);
+	cenrep->CleanupCancelTransactionPushL();
+    User::LeaveIfError(cenrep->Set( aCategory, aCode)); 
+           
+    TBuf<KMaxDllExtensionLength> extension;       
+    extension.Format( KDllExtensionFormat, aCode );
+    
+    // Padd ".1" to ".001" for compatibility.   
+    for( ; extension.Length() < KMinDllExtensionLength ;) 
+        {
+        extension.Insert( KDllExtensionPaddingPosition,
+                          KDllExtensionPadding );
+        }
+
+    TBuf<KMaxDllNameLength> dllName( aDllNameBase );
+    dllName.Append( extension );
+    
+    //Loading DLL
+    TExtendedLocale extLocale;
+    extLocale.LoadSystemSettings();
+    errorCode = extLocale.LoadLocaleAspect( dllName );
+    ERROR_TRACE_2( "LoadLocaleAspect returned error %d while loading dll %S" ,errorCode, &dllName );
+    User::LeaveIfError(errorCode);
+	
+    User::LeaveIfError(extLocale.SaveSystemSettings());
+	errorCode = cenrep->CommitTransaction(keyInfo);
+	if ( KErrNone != errorCode )
+        {
+        ERROR_TRACE_2( "CommitTransaction() error: Key Info %d for setting Category %d", keyInfo, aCategory  );
+        User::Leave(errorCode);
+        }
+	CleanupStack::PopAndDestroy();// for CleanupCancelTransactionPushL()
+	CleanupStack::PopAndDestroy(cenrep);
+    User::LeaveIfError(TLocale().Set());    
+    }
+
+void SysLangUtil::ReadFileL(CArrayFixFlat<TInt>*& aArray, const TDesC& aFilePath, RFs* aFileServerSession )
+    {
+    TBool hadFS = EFalse;
+    TInt err = KErrNone;
+    if ( aArray )
+        {
+        delete aArray;
+        aArray = NULL;
+        }
+    aArray = new(ELeave) CArrayFixFlat<TInt>( KLangArraySize );    
+    
+    aFileServerSession = CheckFS( aFileServerSession, hadFS, err );    
+    User::LeaveIfError(err);
+    RFile file;
+    CleanupClosePushL(file);
+    err = file.Open(*aFileServerSession, aFilePath, EFileStream | EFileRead | EFileShareReadersOnly );
+    ERROR_TRACE_2( "SysLangUtil::ReadFileL() : Opening the file : %S failed with error : %d", &aFilePath, err) ; 
+	User::LeaveIfError(err);
+	
+    // Prepare Reader
+    TFileText reader;
+    reader.Set( file );
+    err = reader.Seek( ESeekStart );
+    if ( !err )
+        {
+        TBuf<KReadBufSize> readBuf;
+        for ( TInt i = 0; !reader.Read( readBuf ) && readBuf.Length(); ++i )
+            {
+            TLex lex( readBuf );
+            lex.SkipSpace();
+            TInt value;
+            err = lex.Val( value );
+            if ( err ) 
+                {
+                break;                
+                }
+            // IGNORE the Leave
+            TRAP_IGNORE( aArray->AppendL( value ));                          
+            readBuf.Zero();
+            }
+        }
+    CleanupStack::PopAndDestroy(&file);    
+    if ( !hadFS )
+        {
+        aFileServerSession->Close();
+        delete aFileServerSession;
+        aFileServerSession = NULL;
+        }  
+    }
+