//
// The developer of the original code and/or files is Tripwire, Inc.
// Portions created by Tripwire, Inc. are copyright (C) 2000 Tripwire,
// Inc. Tripwire is a registered trademark of Tripwire, Inc.  All rights
// reserved.
// 
// This program is free software.  The contents of this file are subject
// to the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.  You may redistribute it and/or modify it
// only in compliance with the GNU General Public License.
// 
// This program is distributed in the hope that it will be useful.
// However, this program is distributed AS-IS WITHOUT ANY
// WARRANTY; INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS
// FOR A PARTICULAR PURPOSE.  Please see the GNU General Public License
// for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 
// Nothing in the GNU General Public License or any other license to use
// the code or files shall permit you to use Tripwire's trademarks,
// service marks, or other intellectual property without Tripwire's
// prior written consent.
// 
// If you have any questions, please contact Tripwire, Inc. at either
// info@tripwire.org or www.tripwire.org.
//
///////////////////////////////////////////////////////////////////////////////
// bytequeue.h
//
// cByteQueue -- specification file for an unlimited queue for storing bytes
//	
// this is a superior implementation of the byte queue supplied with the crypto++ lib
#ifndef __BYTEQUEUE_H
#define __BYTEQUEUE_H

#include "cryptlib/cryptlib.h"

class cByteQueueNode;

class cByteQueue : public BufferedTransformation
{
public:
	cByteQueue(int nodeSize=1024);
	cByteQueue(const cByteQueue &copy);
	~cByteQueue();

	// how many bytes currently stored
	unsigned long CurrentSize() const;
	unsigned long MaxRetrieveable()
		{return CurrentSize();}

	void Put(byte inByte);
	void Put(const byte *inString, unsigned int length);

	// both functions returns the number of bytes actually retrived
	unsigned int Get(byte &outByte);
	unsigned int Get(byte *outString, unsigned int getMax);

	unsigned int Peek(byte &outByte) const;

	void CopyTo(BufferedTransformation &target) const;
	void CopyTo(byte *target) const;

	cByteQueue & operator=(const cByteQueue &rhs);
	bool operator==(const cByteQueue &rhs) const;
	byte operator[](unsigned long i) const;

private:
	void CopyFrom(const cByteQueue &copy);
	void Destroy();

	int			mNodeSize;
	int			mCurrentSize;
	cByteQueueNode *head, *tail;
};

#endif //__BYTEQUEUE_H