115 lines
5.6 KiB
C++
115 lines
5.6 KiB
C++
//
|
|
// 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/B64STRAW.CPP 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 : B64STRAW.CPP *
|
|
* *
|
|
* Programmer : Joe L. Bostic *
|
|
* *
|
|
* Start Date : 07/02/96 *
|
|
* *
|
|
* Last Update : July 3, 1996 [JLB] *
|
|
* *
|
|
*---------------------------------------------------------------------------------------------*
|
|
* Functions: *
|
|
* Base64Straw::Get -- Fetch data and convert it to/from base 64 encoding. *
|
|
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
|
|
|
|
|
|
#include "b64straw.h"
|
|
#include "base64.h"
|
|
#include <string.h>
|
|
|
|
|
|
/***********************************************************************************************
|
|
* Base64Straw::Get -- Fetch data and convert it to/from base 64 encoding. *
|
|
* *
|
|
* This routine will fetch the number of bytes requested and perform any conversion as *
|
|
* necessary upon the data. The nature of Base 64 encoding means that the data will *
|
|
* increase in size by 30% when encoding and decrease in like manner when decoding. *
|
|
* *
|
|
* INPUT: source -- The buffer to hold the processed data. *
|
|
* *
|
|
* length -- The number of bytes requested. *
|
|
* *
|
|
* OUTPUT: Returns with the number of bytes stored into the buffer. If the number is less *
|
|
* than requested, then this indicates that the data stream has been exhausted. *
|
|
* *
|
|
* WARNINGS: none *
|
|
* *
|
|
* HISTORY: *
|
|
* 07/03/1996 JLB : Created. *
|
|
*=============================================================================================*/
|
|
int Base64Straw::Get(void * source, int slen)
|
|
{
|
|
int total = 0;
|
|
|
|
char * from;
|
|
int fromsize;
|
|
char * to;
|
|
int tosize;
|
|
|
|
if (Control == ENCODE) {
|
|
from = PBuffer;
|
|
fromsize = sizeof(PBuffer);
|
|
to = CBuffer;
|
|
tosize = sizeof(CBuffer);
|
|
} else {
|
|
from = CBuffer;
|
|
fromsize = sizeof(CBuffer);
|
|
to = PBuffer;
|
|
tosize = sizeof(PBuffer);
|
|
}
|
|
|
|
/*
|
|
** Process the byte request in code blocks until there are either
|
|
** no more source bytes available or the request has been fulfilled.
|
|
*/
|
|
while (slen > 0) {
|
|
|
|
/*
|
|
** Transfer any processed bytes available to the request buffer.
|
|
*/
|
|
if (Counter > 0) {
|
|
int len = (slen < Counter) ? slen : Counter;
|
|
memmove(source, &to[tosize-Counter], len);
|
|
Counter -= len;
|
|
slen -= len;
|
|
source = ((char *)source) + len;
|
|
total += len;
|
|
}
|
|
if (slen == 0) break;
|
|
|
|
/*
|
|
** More bytes are needed, so fetch and process another base 64 block.
|
|
*/
|
|
int incount = Straw::Get(from, fromsize);
|
|
if (Control == ENCODE) {
|
|
Counter = Base64_Encode(from, incount, to, tosize);
|
|
} else {
|
|
Counter = Base64_Decode(from, incount, to, tosize);
|
|
}
|
|
if (Counter == 0) break;
|
|
}
|
|
|
|
return(total);
|
|
}
|