genericservices/httputils/inc/WSPDecoder.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 02:01:42 +0200
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// Copyright (c) 2001-2009 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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//
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/**
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 @file WSPDecoder.h
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 @publishedAll
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 @deprecated
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*/
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#ifndef	__WSPDECODER_H__
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#define	__WSPDECODER_H__
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#include <e32base.h>
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#include <stringpool.h>
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/** 
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* This file contains the following classes:
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*	TWspField 
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*	TWspHeaderSegmenter 
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*	TWspPrimitiveDecoder  
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*	
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*/
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/**
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enum DecoderPanic
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@publishedAll
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@deprecated
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*/
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enum TWspDecoderPanic
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	{
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	/**
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	LongIntOverflow
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	*/
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	EWspDecoderLongIntOverflow,
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	/**
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	DateOverflow
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	*/
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	EWspDecoderDateOverflow
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	};
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/**
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TWspField class holds the pair <HeaderName, ValueBuffer>
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This is a simple class that associates these values.
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No ownership is handed to this class.  It is up to user of this class to
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open and close all resources used.
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@publishedAll
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@deprecated
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*/
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class TWspField 
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	{
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public:
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	inline TWspField();
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	inline TWspField(RStringF aHdrName, TPtrC8 aValBuf);
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	/**
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	The header name of a opened RStringF - *Not Owned*
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	This is externally opened.  It must be externally 
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	closed.
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	*/
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	RStringF iHdrName;
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	/** The raw value buffer - Note: Not owned by this */
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	TPtrC8	 iValBuffer;
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	};
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/** 
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TWspHeaderSegmenter segments a WSP buffer into WSP header/value pairs.  
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It detects boundaries between header/values based on the WAP-WSP spec.
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	- To construct, buffer and string pool is passed in
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	- Call to NextL() to iterate through the buffer - this returns a TWspField
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	- NextL() returns KErrNotFound when done
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@publishedAll
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@deprecated
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*/ 
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class TWspHeaderSegmenter
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	{
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public:
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	inline TWspHeaderSegmenter(RStringPool aPool, const TStringTable& aStringTable, TPtrC8 aBuffer); 
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	IMPORT_C TInt NextL(TWspField& aWspHeader);
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	inline TInt Offset() const;
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private:
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	/** Raw buffer that will be segmented - Not Owned */
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	TPtrC8		iBuffer;
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	/** Segment offset into the buffer. */
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	TInt		iOffset;
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	/** Opened string pool to use with the string table already loaded - Not Owned */
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	RStringPool iPool;
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	/** The string table to use in the string pool - Not Owned */
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	const TStringTable& iStringTable;
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	};
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/** 
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Decoder for WSP Primitves - WAP-WSP Section 8.4.1
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@publishedAll
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@deprecated
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*/ 
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class TWspPrimitiveDecoder 
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	{
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  public:
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	/**
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	* TWspHeaderType describe the types from WAP-WSP Section 8.4.1.2
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	*/
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	 enum TWspHeaderType
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		{
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		/**
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		The type has not been set 
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		*/
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		ENotSet,		
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		/**
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		0-31 -  octet is a value length 
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		*/
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		ELengthVal,		
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		/**
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		34 - value is a quoted text string, terminated by a Null
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		*/
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		EQuotedString,	
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		/** 
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		32-127 - value is a text string, terminated by a Null
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		*/
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		EString,		
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		/**
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		128-255 - encoded 7 bit value, this header has no more data	
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		*/
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		E7BitVal		
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		};
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	inline TWspPrimitiveDecoder(TPtrC8 aBuffer);
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	IMPORT_C TWspHeaderType VarType() const;
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	IMPORT_C TInt LengthVal(TInt& aVal);
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	IMPORT_C TInt String(TPtrC8& aString);
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	IMPORT_C TInt Val7Bit(TUint8& aVal);
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	IMPORT_C TInt Integer(TUint32& aVal);
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	IMPORT_C TInt LongInt(TUint32& aVal);
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	IMPORT_C TInt UintVar(TUint32& aVal);
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	IMPORT_C TInt VersionL(RStringPool aPool, RStringF& aVer);
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	IMPORT_C TInt Date(TDateTime& aDateTime);
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  private:
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	/** The raw buffer */
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	TPtrC8 iBuffer;
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	/** The current offset */
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	TInt   iOffset;
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	};
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/**
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  Constructor
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 */
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inline TWspField::TWspField()
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	{
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	}
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/**
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  Constructor
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  @param aHdrName In - The Header Name.  This must be an opened RStringF
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  @param aValBuf In - the Buffer containing the header value in its raw format
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*/
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inline TWspField::TWspField(RStringF aHdrName, TPtrC8 aValBuf) : 
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		iHdrName(aHdrName), 
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		iValBuffer(aValBuf) 
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	{
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	}
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/**
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  Constructor
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  @param aPool In - an opened RStringPool - owned by the caller
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  @param aStringTable In - the string table in the string pool to use
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  @param aBuffer In - the buffer containing the WSP header data - owned by the caller
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  @pre The string table must be opened with the WSP Sting constants table
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*/
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inline TWspHeaderSegmenter::TWspHeaderSegmenter(RStringPool aPool, const TStringTable& aStringTable, TPtrC8 aBuffer) : 
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		iBuffer(aBuffer), 
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		iOffset(0),
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		iPool(aPool),
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		iStringTable(aStringTable)
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	{
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	}
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/**
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  Offset	returns the current offset into the buffer being parsed.
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  @return	TInt offset value. It will point to beginning of next segmented field.
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 			If NextL has not been called it will be set to 0. The beginning of the buffer.
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 			If buffer has been completely parsed, will return KErrNotFound.
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*/
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inline TInt TWspHeaderSegmenter::Offset() const
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	{
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	return (iOffset < iBuffer.Length()) ? iOffset : KErrNotFound;	
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	}
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/**
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  Constructor
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  @param aBuffer In - the buffer containing the value in its raw format
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*/
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inline TWspPrimitiveDecoder::TWspPrimitiveDecoder(TPtrC8 aBuffer) : 
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		iBuffer(aBuffer), 
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		iOffset(0) 
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	{
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	}
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#endif // __WSPDECODER_H__
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