--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianNativeTools/Source/pagedcompress.cpp	Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,232 @@
+/*
+* Copyright (c) 2009 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:
+*
+*/
+#include "pagedcompress.h"
+
+// User includes
+#include "h_utl.h"
+#include "byte_pair.h"
+#include "e32defwrap.h"
+#include "e32errwrap.h"
+
+// Constants and defines
+const TInt MaxBlockSize = 0x1000;
+#define PAGE_SIZE 4096
+
+
+typedef struct IndexTableItemTag
+{
+	TUint16 iSizeOfCompressedPageData;	// pointer to an array TUint16[NumberOfPages]
+	TUint8 *iCompressedPageData;		// pointer to an array TUint8*. Each elemet of 
+										// this array point a compressed Page data	
+}IndexTableItem;
+
+
+typedef struct IndexTableHeaderTag
+{
+	TInt	iSizeOfData;					// Includes the index and compressed pages
+	TInt	iDecompressedSize;
+	TUint16	iNumberOfPages;
+} IndexTableHeader;
+
+
+class CBytePairCompressedImage
+{
+	public:
+		static CBytePairCompressedImage* NewLC(TUint16 aNumberOfPages, TInt aSize);
+		
+		~CBytePairCompressedImage();
+		
+		int  GetPage(TUint16 aPageNum, TUint8 * aPageData);
+		int  ReadInTable(std::istream &is, TUint & aNumberOfPages);
+	
+	private:
+		TInt ConstructL( TUint16 aNumberOfPages, TInt aSize);
+		CBytePairCompressedImage();
+		
+	private:
+		IndexTableHeader 	iHeader;
+		IndexTableItem*		iPages;
+		TUint8* 			iOutBuffer; 
+		
+};
+
+
+CBytePairCompressedImage::CBytePairCompressedImage()
+{
+	
+}
+
+
+CBytePairCompressedImage* CBytePairCompressedImage::NewLC(TUint16 aNumberOfPages, TInt aSize)
+{
+	CBytePairCompressedImage* self = new CBytePairCompressedImage;
+	if( NULL == self)
+	{
+		return self;
+	}
+	
+	if( KErrNone == self->ConstructL(aNumberOfPages, aSize))
+	{
+		return self;
+	}
+	return NULL;
+}
+
+
+TInt CBytePairCompressedImage::ConstructL(TUint16 aNumberOfPages, TInt aSize)
+{
+	//Print(EWarning,"Start ofCBytePairCompressedImage::ConstructL(%d, %d)\n", aNumberOfPages, aSize );
+	iHeader.iNumberOfPages = aNumberOfPages;
+	iHeader.iDecompressedSize = aSize;
+	
+	if( 0 != aNumberOfPages)
+	{
+		iPages = (IndexTableItem *) calloc(aNumberOfPages, sizeof(IndexTableItem));
+		
+		if( NULL == iPages )
+		{
+			return KErrNoMemory;
+		}
+	}
+		
+	iHeader.iSizeOfData = 	sizeof(iHeader.iSizeOfData) + 
+							sizeof(iHeader.iDecompressedSize) + 
+							sizeof(iHeader.iNumberOfPages) + 
+							aNumberOfPages * sizeof(TUint16);
+	
+	iOutBuffer = (TUint8 *) calloc(4 * PAGE_SIZE, sizeof(TUint8) ); 
+	
+	if ( NULL == iOutBuffer)
+	{
+		return KErrNoMemory;
+	}
+	return KErrNone;
+} // End of ConstructL()
+
+CBytePairCompressedImage::~CBytePairCompressedImage()
+{
+	
+	for( int i = 0; i < iHeader.iNumberOfPages; i++)
+	{
+		free(iPages[i].iCompressedPageData);
+		iPages[i].iCompressedPageData = NULL;
+	}
+	
+	free( iPages );
+	iPages = NULL;
+	
+	free( iOutBuffer );
+	iOutBuffer = NULL;
+}
+
+
+int CBytePairCompressedImage::ReadInTable(std::istream &is, TUint & aNumberOfPages)
+{
+	// Read page index table header
+    int count = (sizeof(iHeader.iSizeOfData)+sizeof(iHeader.iDecompressedSize)+sizeof(iHeader.iNumberOfPages));
+	is.read((char *)&iHeader, count);
+
+	// Allocatin place to Page index table entries
+	iPages = (IndexTableItem *) calloc(iHeader.iNumberOfPages, sizeof(IndexTableItem));
+		
+	if( NULL == iPages )
+	{
+		return KErrNoMemory;
+	}
+
+	// Read whole Page index table 
+	for(TInt i = 0; i < iHeader.iNumberOfPages; i++)
+	{
+		is.read((char *) &(iPages[i].iSizeOfCompressedPageData), sizeof(TUint16));
+	}
+
+	// Read compressed data pages page by page, decompress and store them
+	for(TInt i = 0; i < iHeader.iNumberOfPages; i++)
+	{
+
+		iPages[i].iCompressedPageData = (TUint8 *) calloc(iPages[i].iSizeOfCompressedPageData, sizeof(TUint8) );
+	
+		if( NULL == iPages[i].iCompressedPageData )
+		{
+			return KErrNoMemory;
+		}
+
+		is.read((char *)iPages[i].iCompressedPageData, iPages[i].iSizeOfCompressedPageData);
+	}
+
+	aNumberOfPages = iHeader.iNumberOfPages;
+
+	return KErrNone;
+}
+
+int  CBytePairCompressedImage::GetPage(TUint16 aPageNum, TUint8 * aPageData)
+{
+	TUint8* pakEnd;
+        
+       
+   	TUint16 uncompressedSize = (TUint16) UnpackBytePair( aPageData, 
+												         MaxBlockSize, 
+												         iPages[aPageNum].iCompressedPageData, 
+												         iPages[aPageNum].iSizeOfCompressedPageData, 
+												         pakEnd );
+
+	return uncompressedSize;
+
+
+}
+
+
+
+int DecompressPages(TUint8 * bytes, std::istream& is)
+{
+	TUint decompressedSize = 0;
+	CBytePairCompressedImage *comprImage = CBytePairCompressedImage::NewLC(0, 0);
+	if( NULL == comprImage)
+	{
+		return KErrNoMemory;
+	}
+
+	TUint numberOfPages = 0;
+	comprImage->ReadInTable(is, numberOfPages);
+
+
+	TUint8* iPageStart;
+	TUint16 iPage = 0;
+	
+	while(iPage < numberOfPages )
+	{
+		iPageStart = &bytes[iPage * PAGE_SIZE];
+		
+		decompressedSize += comprImage->GetPage(iPage, iPageStart);
+
+		++iPage;
+	}
+	
+	delete comprImage;
+	return decompressedSize;
+
+}
+
+TInt UnpackBytePairE32Image( TUint8* aSource, TInt aSourceSize, TUint8* aDest, TInt aDestSize, TInt& aInputBytesRead )
+{
+    istrstream stream( (const char*) aSource, aSourceSize );
+    const streampos startPos = stream.tellg();
+    const TInt ret = DecompressPages( aDest, stream );
+    const streampos endPos = stream.tellg();
+    aInputBytesRead = endPos - startPos;
+    return ret;
+}