/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file)
 and all other portions of this file are Copyright (c) 2013-2017 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#ifndef TC_HEADER_Platform_Buffer
#define TC_HEADER_Platform_Buffer

#include "PlatformBase.h"
#include "Memory.h"

namespace VeraCrypt
{

	class ConstBufferPtr
	{
	public:
		ConstBufferPtr ()
			: DataPtr (nullptr), DataSize (0) { }
		ConstBufferPtr (const byte *data, size_t size)
			: DataPtr (data), DataSize (size) { }
		virtual ~ConstBufferPtr () { }

		operator const byte * () const { return DataPtr; }

		bool IsDataEqual (const ConstBufferPtr &other) const { return Memory::Compare (DataPtr, DataSize, other.DataPtr, other.DataSize) == 0; }
		const byte *Get () const { return DataPtr; }
		ConstBufferPtr GetRange (size_t offset, size_t size) const;
		void Set (const byte *data, size_t size) { DataPtr = data; DataSize = size; }
		size_t Size () const { return DataSize; }

	protected:
		const byte *DataPtr;
		size_t DataSize;
	};


	class BufferPtr
	{
	public:
		BufferPtr ()
			: DataPtr (nullptr), DataSize (0) { }
		BufferPtr (byte *data, size_t size)
			: DataPtr (data), DataSize (size) { }
		virtual ~BufferPtr () { }

		operator byte * () const { return DataPtr; }
		void CopyFrom (const ConstBufferPtr &bufferP2014-12-04