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