163 lines
7.7 KiB
C++
163 lines
7.7 KiB
C++
//
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// Copyright 2020 Electronic Arts Inc.
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//
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free
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// software: you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
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// in the hope that it will be useful, but with permitted additional restrictions
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// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
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// distributed with this program. You should have received a copy of the
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// GNU General Public License along with permitted additional restrictions
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// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
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/* $Header: /CounterStrike/B64PIPE.CPP 1 3/03/97 10:24a Joe_bostic $ */
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/***********************************************************************************************
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*** 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 ***
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***********************************************************************************************
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* *
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* Project Name : Command & Conquer *
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* *
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* File Name : B64PIPE.CPP *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : 06/30/96 *
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* *
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* Last Update : July 3, 1996 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* Base64Pipe::Put -- Processes a block of data through the pipe. *
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* Base64Pipe::Flush -- Flushes the final pending data through the pipe. *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "b64pipe.h"
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#include "base64.h"
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#include <string.h>
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/***********************************************************************************************
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* Base64Pipe::Put -- Processes a block of data through the pipe. *
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* *
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* This will take the data submitted and either Base64 encode or decode it (as specified *
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* in the pipe's constructor). The nature of Base64 encoding means that the data will *
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* grow 30% in size when encoding and decrease by a like amount when decoding. *
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* *
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* INPUT: source -- Pointer to the data to be translated. *
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* *
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* length -- The number of bytes to translate. *
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* *
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* OUTPUT: Returns with the actual number of bytes output at the far distant final end of *
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* the pipe chain. *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 07/03/1996 JLB : Created. *
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*=============================================================================================*/
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int Base64Pipe::Put(void const * source, int slen)
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{
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if (source == NULL || slen < 1) {
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return(Pipe::Put(source, slen));
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}
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int total = 0;
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char * from;
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int fromsize;
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char * to;
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int tosize;
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if (Control == ENCODE) {
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from = PBuffer;
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fromsize = sizeof(PBuffer);
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to = CBuffer;
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tosize = sizeof(CBuffer);
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} else {
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from = CBuffer;
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fromsize = sizeof(CBuffer);
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to = PBuffer;
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tosize = sizeof(PBuffer);
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}
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if (Counter > 0) {
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int len = (slen < (fromsize-Counter)) ? slen : (fromsize-Counter);
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memmove(&from[Counter], source, len);
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Counter += len;
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slen -= len;
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source = ((char *)source) + len;
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if (Counter == fromsize) {
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int outcount;
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if (Control == ENCODE) {
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outcount = Base64_Encode(from, fromsize, to, tosize);
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} else {
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outcount = Base64_Decode(from, fromsize, to, tosize);
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}
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total += Pipe::Put(to, outcount);
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Counter = 0;
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}
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}
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while (slen >= fromsize) {
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int outcount;
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if (Control == ENCODE) {
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outcount = Base64_Encode(source, fromsize, to, tosize);
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} else {
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outcount = Base64_Decode(source, fromsize, to, tosize);
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}
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source = ((char *)source) + fromsize;
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total += Pipe::Put(to, outcount);
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slen -= fromsize;
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}
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if (slen > 0) {
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memmove(from, source, slen);
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Counter = slen;
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}
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return(total);
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}
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/***********************************************************************************************
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* Base64Pipe::Flush -- Flushes the final pending data through the pipe. *
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* *
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* If there is any non-processed data accumulated in the holding buffer (quite likely when *
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* encoding), then it will be processed and flushed out the end of the pipe. *
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* *
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* INPUT: none *
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* *
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* OUTPUT: Returns with the number of bytes output at the far distant final end of the pipe *
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* chain. *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 07/03/1996 JLB : Created. *
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*=============================================================================================*/
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int Base64Pipe::Flush(void)
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{
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int len = 0;
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if (Counter) {
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if (Control == ENCODE) {
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int chars = Base64_Encode(PBuffer, Counter, CBuffer, sizeof(CBuffer));
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len += Pipe::Put(CBuffer, chars);
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} else {
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int chars = Base64_Decode(CBuffer, Counter, PBuffer, sizeof(PBuffer));
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len += Pipe::Put(PBuffer, chars);
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}
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Counter = 0;
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}
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len += Pipe::Flush();
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return(len);
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}
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