b64straw.h

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/*
**  Command & Conquer Generals Zero Hour(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/b64straw.h                                         $* 
 *                                                                                             * 
 *                      $Author:: Eric_c                                                      $*
 *                                                                                             * 
 *                     $Modtime:: 4/02/99 11:58a                                              $*
 *                                                                                             * 
 *                    $Revision:: 2                                                           $*
 *                                                                                             *
 *---------------------------------------------------------------------------------------------* 
 * Functions:                                                                                  * 
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
 
#ifndef B64STRAW_H
#define B64STRAW_H
 
#include    "straw.h"
 
/*
**  Performs Base 64 encoding/decoding on the data that is drawn through the straw. Note that
**  encoding increases the data size by about 30%. The reverse occurs when decoding.
*/
class Base64Straw : public Straw
{
    public:
        typedef enum CodeControl {
            ENCODE,
            DECODE
        } CodeControl;
 
        Base64Straw(CodeControl control) : Control(control), Counter(0) {}
        virtual int Get(void * 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.
        */
        Base64Straw(Base64Straw & rvalue);
        Base64Straw & operator = (Base64Straw const & pipe);
};
 
 
#endif