Renegade/Code/wwlib/b64pipe.h

/*
**	Command & Conquer Renegade(tm)
**	Copyright 2025 Electronic Arts Inc.
**
**	This program 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.
**
**	This program is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  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, see <http://www.gnu.org/licenses/>.
*/

/*********************************************************************************************** 
 ***              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                                            * 
 *                                                                                             * 
 *                     $Archive:: /G/wwlib/b64pipe.h                                          $* 
 *                                                                                             * 
 *                      $Author:: Eric_c                                                      $*
 *                                                                                             * 
 *                     $Modtime:: 4/02/99 11:58a                                              $*
 *                                                                                             * 
 *                    $Revision:: 2                                                           $*
 *                                                                                             *
 *---------------------------------------------------------------------------------------------* 
 * Functions:                                                                                  * 
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

#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