/*
** Command & Conquer Red Alert(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/>.
*/
/* $Header: /CounterStrike/PIPE.CPP 1 3/03/97 10:25a 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 : PIPE.CPP *
* *
* Programmer : Joe L. Bostic *
* *
* Start Date : 06/29/96 *
* *
* Last Update : July 3, 1996 [JLB] *
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* Pipe::Put_To -- Connect a pipe to flow data into from this pipe. *
* Pipe::Flush -- Flush all pending data out the pipe. *
* Pipe::Put -- Feed some data through the pipe. *
* Pipe::~Pipe -- Destructor for pipe class object. *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include "pipe.h"
#include <stddef.h>
#include <string.h>
/***********************************************************************************************
* Pipe::~Pipe -- Destructor for pipe class object. *
* *
* This destructor will unlink itself from any other pipes that it may be chained to. In *
* the process, it will flush any output it may have pending. *
* *
* INPUT: none *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/03/1996 JLB : Created. *
*=============================================================================================*/
Pipe::~Pipe(void)
{
if (ChainTo != NULL) {
ChainTo->ChainFrom = ChainFrom;
}
if (ChainFrom != NULL) {
ChainFrom->Put_To(ChainTo);
}
ChainFrom = NULL;
ChainTo = NULL;
}
/***********************************************************************************************
* Pipe::Put_To -- Connect a pipe to flow data into from this pipe. *
* *
* This routine will link two pipes together. The specified pipe will be fed data from *
* this pipe. *
* *
* INPUT: pipe -- Pointer to the pipe that data will flow to. *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/03/1996 JLB : Created. *
*=============================================================================================*/
void Pipe::Put_To(Pipe * pipe)
{
if (ChainTo != pipe) {
if (pipe != NULL && pipe->ChainFrom != NULL) {
pipe->ChainFrom->Put_To(NULL);
pipe->ChainFrom = NULL;
}
if (ChainTo != NULL) {
ChainTo->ChainFrom = NULL;
ChainTo->Flush();
}
ChainTo = pipe;
if (ChainTo != NULL) {
ChainTo->ChainFrom = this;
}
}
}
/***********************************************************************************************
* Pipe::Put -- Feed some data through the pipe. *
* *
* Use this to force feed data through the pipe. It is guaranteed to accept data as fast *
* as you can supply it. *
* *
* INPUT: source -- Pointer to the data to feed to this routine. *
* *
* length -- The number of bytes of data to submit. *
* *
* OUTPUT: Returns with the number of bytes actually output at the other far distant final *
* end of the pipe. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/03/1996 JLB : Created. *
*=============================================================================================*/
int Pipe::Put(void const * source, int length)
{
if (ChainTo != NULL) {
return(ChainTo->Put(source, length));
}
return(length);
}
/***********************************************************************************************
* Pipe::Flush -- Flush all pending data out the pipe. *
* *
* Then the pipe needs to be flushed, this routine will be called. Since pipe segments *
* might have internal staging buffer for the data, this routine is necessary to force *
* all staging buffers to be clear. This routine is called when the pipe is being *
* destroyed. *
* *
* INPUT: none *
* *
* OUTPUT: Returns with the number of bytes output at the far distant final end of the pipe *
* chain. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/03/1996 JLB : Created. *
*=============================================================================================*/
int Pipe::Flush(void)
{
if (ChainTo != NULL) {
return(ChainTo->Flush());
}
return(0);
}