--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upnpavcontroller/upnpxmlparser/src/upnpxmlstringutility.cpp	Thu Dec 17 08:52:00 2009 +0200
@@ -0,0 +1,140 @@
+/*
+* Copyright (c) 2008 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"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:      Utility for string operations in UpnpXmlParser component
+*
+*/
+
+
+
+
+
+
+// INCLUDE FILES
+#include <e32base.h>
+#include "upnpxmlstringutility.h"
+
+_LIT( KComponentLogfile, "upnpxmlstringutility.txt" );
+#include "upnplog.h"
+
+
+// CONSTANTS
+/**
+ * Range of control characters taken from http:
+ * //www.w3.org/International/questions/qa-controls. 
+ * Remove characters that belong to "C0" range U+0000-U+001F 
+ * (0-31) and also DEL (Delete) U+007F (127). C1 range U+0080-U+009F 
+ * (128-159) is ignored for now because it seems to contain ok 
+ * characters like € (euro sign).
+ * */
+
+const TInt KC0RangeStart = 0;
+const TInt KC0RangeEnd = 31;
+const TInt KDeleteChar = 127;
+
+// All control characters start with &#
+_LIT8( KXmlControlCharStart, "&#" );
+// All xml entities end with ; because they are of for &entityname;
+_LIT8( KXmlEntityEnd, ";" );
+
+// ============================ LOCAL FUNCTIONS =============================
+
+// --------------------------------------------------------------------------
+// UpnpXmlStringUtility::RemoveXmlControlCharactersL
+//---------------------------------------------------------------------------
+EXPORT_C HBufC8* UpnpXmlStringUtility::RemoveXmlControlCharactersL(
+    const TDesC8& aXmlData )
+    {
+    __LOG( "UpnpXmlStringUtility::RemoveXmlControlCharactersL Begin" );
+    HBufC8* filtrateBuf = NULL;
+    //if no data
+    if ( aXmlData.Length() != 0 )
+        {
+        //The offset of the KXmlControlCharStart from the beginning of \
+          this descriptor's data
+        
+        TInt controlCharStartOffset = aXmlData.Find( KXmlControlCharStart );
+        // to make sure the data contain control character.
+        if ( controlCharStartOffset != KErrNotFound )
+            {
+            filtrateBuf = aXmlData.AllocL();
+            CleanupStack::PushL( filtrateBuf );    
+            //The offset of the KXmlEntityEnd from the beginning of this \
+              descriptor's data
+            TInt controlCharEndOffset = 0;
+            //The offset of the buffer who not be checked
+            TInt partofBufferOffset = 0;
+   
+            //circle find control character.
+            while( controlCharStartOffset != KErrNotFound )
+                {
+                controlCharStartOffset += partofBufferOffset;
+                partofBufferOffset = controlCharStartOffset;
+                controlCharEndOffset = ( filtrateBuf->Des().
+                    Mid( controlCharStartOffset ).Find( KXmlEntityEnd ) );
+                if ( controlCharEndOffset != KErrNotFound )
+                    {
+                    TLex8 tempLex( filtrateBuf->Des().Mid( partofBufferOffset
+                      + KXmlControlCharStart().Length() ,controlCharEndOffset
+                      - KXmlControlCharStart().Length() ) );
+                    //Parses the string to extract a signed 8-bit integer.
+                    TInt tempNum;
+                    User::LeaveIfError( tempLex.Val( tempNum ) );
+                    if( ( tempNum >= KC0RangeStart && tempNum <= KC0RangeEnd )
+                         || ( tempNum == KDeleteChar ) )
+                        {
+                        __LOG( "UpnpXmlStringUtility::\
+RemoveXmlControlCharactersL delete control character" );
+                        TPtrC8 tmpBuf = filtrateBuf->Des().Mid( 
+                            partofBufferOffset, controlCharEndOffset + 
+                            KXmlEntityEnd().Length() );
+                        __LOG8( tmpBuf);
+                        
+                        filtrateBuf->Des().Delete( partofBufferOffset, 
+                        controlCharEndOffset + KXmlEntityEnd().Length() );
+                        }
+                    else 
+                        {
+                        __LOG1( "UpnpXmlStringUtility::\
+RemoveXmlControlCharactersL between &# and; the Number is %d",tempNum );
+                        }
+                    controlCharStartOffset = partofBufferOffset;
+                    controlCharStartOffset = ( filtrateBuf->Des().
+                                        Mid( controlCharStartOffset ).
+                                        Find( KXmlControlCharStart ) );
+                    }
+                else 
+                    {
+                    __LOG( "UpnpXmlStringUtility::RemoveXmlControlCharactersL\
+ Can not find EntityEnd" );
+                    User::Leave( KErrArgument );
+                    }
+                }
+            CleanupStack::Pop( filtrateBuf );
+            }
+        else
+            {
+            // not contains control character.
+            __LOG( "UpnpXmlStringUtility::RemoveXmlControlCharactersL Can \
+                   not find control character!" );
+            }
+        }
+    else
+        {
+        //xml data is NULL
+        __LOG( "UpnpXmlStringUtility::RemoveXmlControlCharactersL the \
+                            xml data is NULL" );
+        }
+    __LOG( "UpnpXmlStringUtility::RemoveXmlControlCharactersL End" );
+    return filtrateBuf;
+    }