crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianImageLib/Common/Streams/SIStream.cs
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/crashanalysercmd/PerfToolsSharedLibraries/Engine/SymbianImageLib/Common/Streams/SIStream.cs Thu Feb 11 15:50:58 2010 +0200
@@ -0,0 +1,171 @@
+/*
+* 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:
+*
+*/
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.IO;
+using SymbianUtils;
+using SymbianUtils.Streams;
+using SymbianImageLib.Common.Header;
+using SymbianStructuresLib.Compression.Common;
+
+namespace SymbianImageLib.Common.Streams
+{
+ internal class SIStream : DisposableObject
+ {
+ #region Enumerations
+ public enum TOwnershipType
+ {
+ EOwned = 0,
+ EOwnedExternally
+ }
+ #endregion
+
+ #region Constructors
+ public SIStream()
+ : this( null, TOwnershipType.EOwned )
+ {
+ }
+
+ public SIStream( Stream aStream )
+ : this( aStream, TOwnershipType.EOwned )
+ {
+ }
+
+ public SIStream( Stream aStream, TOwnershipType aType )
+ {
+ SwitchStream( aStream, aType );
+ }
+ #endregion
+
+ #region Framework API
+ public virtual bool InRange( long aPosition )
+ {
+ bool ret = ( aPosition >= 0 && aPosition < this.Length );
+ return ret;
+ }
+
+ public virtual void Seek( long aPosition, SeekOrigin aOrigin )
+ {
+ iStream.Seek( aPosition, aOrigin );
+ }
+
+ public virtual int Read( byte[] aBuffer, int aOffset, int aCount )
+ {
+ int ret = iStream.Read( aBuffer, aOffset, aCount );
+ return ret;
+ }
+
+ public virtual void Write( byte[] aBuffer )
+ {
+ Write( aBuffer, 0, aBuffer.Length );
+ }
+
+ public virtual void Write( SIStream aFrom, int aCount )
+ {
+ Write( (Stream) aFrom, aCount );
+ }
+
+ public virtual void Write( Stream aFrom, int aCount )
+ {
+ byte[] temp = new byte[ aCount ];
+ int ret = aFrom.Read( temp, 0, aCount );
+ if ( ret != aCount )
+ {
+ throw new Exception( "Unable to read required number of bytes from stream" );
+ }
+ Write( temp, 0, aCount );
+ }
+
+ public virtual void Write( byte[] aBuffer, int aOffset, int aCount )
+ {
+ iStream.Write( aBuffer, aOffset, aCount );
+ }
+ #endregion
+
+ #region API
+ public void SwitchStream( Stream aStream, TOwnershipType aType )
+ {
+ if ( iStream != null )
+ {
+ if ( iOwnership == TOwnershipType.EOwned )
+ {
+ iStream.Dispose();
+ iStream = null;
+ iLength = 0;
+ }
+ }
+ //
+ iStream = aStream;
+ iOwnership = aType;
+ //
+ if ( iStream != null )
+ {
+ // Cache this because calling it is very expensive.
+ iLength = iStream.Length;
+ }
+ }
+
+ public void Close()
+ {
+ base.Dispose();
+ }
+
+ public void Seek( long aPosition )
+ {
+ Seek( aPosition, SeekOrigin.Begin );
+ }
+
+ public SymbianStreamReaderLE CreateReader()
+ {
+ return SymbianStreamReaderLE.New( iStream );
+ }
+
+ public SymbianStreamReaderLE CreateReader( SymbianStreamReaderLE.TCloseOperation aCloseOperation )
+ {
+ return SymbianStreamReaderLE.New( iStream, aCloseOperation );
+ }
+ #endregion
+
+ #region Properties
+ public long Length
+ {
+ get { return iLength; }
+ }
+ #endregion
+
+ #region Operators
+ public static explicit operator Stream( SIStream aStream )
+ {
+ return aStream.InternalStream;
+ }
+ #endregion
+
+ #region Internal methods
+ protected Stream InternalStream
+ {
+ get { return iStream; }
+ }
+ #endregion
+
+ #region Data members
+ private Stream iStream = null;
+ private TOwnershipType iOwnership = TOwnershipType.EOwned;
+ private long iLength = 0;
+ #endregion
+ }
+}