Remastered-Collection/REDALERT/B64PIPE.H

//
// Copyright 2020 Electronic Arts Inc.
//
// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free 
// software: you can redistribute it and/or modify it under the terms of 
// the GNU General Public License as published by the Free Software Foundation, 
// either version 3 of the License, or (at your option) any later version.

// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed 
// in the hope that it will be useful, but with permitted additional restrictions 
// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT 
// distributed with this program. You should have received a copy of the 
// GNU General Public License along with permitted additional restrictions 
// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection

/* $Header: /CounterStrike/B64PIPE.H 1     3/03/97 10:24a Joe_bostic $ */
/***********************************************************************************************
 ***              C O N F I D E N T I A L  ---  W E S T W O O D  S T U D I O S               ***
 ***********************************************************************************************
 *                                                                                             *
 *                 Project Name : Command & Conquer                                            *
 *                                                                                             *
 *                    File Name : B64PIPE.H                                                    *
 *                                                                                             *
 *                   Programmer : Joe L. Bostic                                                *
 *                                                                                             *
 *                   Start Date : 06/30/96                                                     *
 *                                                                                             *
 *                  Last Update : June 30, 1996 [JLB]                                          *
 *                                                                                             *
 *---------------------------------------------------------------------------------------------*
 * Functions:                                                                                  *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */


#ifndef B64PIPE_H
#define B64PIPE_H

#include	"pipe.h"

/*
**	This class performs Base64 encoding/decoding to the data that is piped through. Note that
**	encoded data will grow in size by about 30%. The reverse occurs when decoding.
*/
class Base64Pipe : public Pipe
{
	public:
		typedef enum CodeControl {
			ENCODE,
			DECODE
		} CodeControl;

		Base64Pipe(CodeControl control) : Control(control), Counter(0) {}

		virtual int Flush(void);
		virtual int Put(void const * source, int slen);

	private:

		/*
		**	Indicates if this is for encoding or decoding of Base64 data.
		*/
		CodeControl Control;

		/*
		**	The counter of the number of accumulated bytes pending for processing.
		*/
		int Counter;

		/*
		**	Buffer that holds the Base64 coded bytes. This will be the staging buffer if
		**	this is for a decoding process. Otherwise, it will be used as a scratch buffer.
		*/
		char CBuffer[4];

		/*
		**	Buffer that holds the plain bytes. This will be the staging buffer if this
		**	is for an encoding process. Otherwise, it will be used as a scratch buffer.
		*/
		char PBuffer[3];

		/*
		**	Explicitly disable the copy constructor and the assignment operator.
		*/
		Base64Pipe(Base64Pipe & rvalue);
		Base64Pipe & operator = (Base64Pipe const & pipe);
};

#endif