/*
** 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/XSTRAW.CPP 1 3/03/97 10:26a 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 : XSTRAW.CPP *
* *
* Programmer : Joe L. Bostic *
* *
* Start Date : 07/04/96 *
* *
* Last Update : July 4, 1996 [JLB] *
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* BufferStraw::Get -- Fetch data from the straw's buffer holding tank. *
* FileStraw::Get -- Fetch data from the file. *
* FileStraw::~FileStraw -- The destructor for the file straw. *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include "xstraw.h"
#include <stddef.h>
#include <string.h>
//---------------------------------------------------------------------------------------------------------
// BufferStraw
//---------------------------------------------------------------------------------------------------------
/***********************************************************************************************
* BufferStraw::Get -- Fetch data from the straw's buffer holding tank. *
* *
* This routine will copy the requested number of bytes from the buffer holding tank (as *
* set up by the straw's constructor) to the buffer specified. *
* *
* INPUT: source -- Pointer to the buffer to be filled with data. *
* *
* length -- The number of bytes requested. *
* *
* OUTPUT: Returns with the number of bytes copied to the buffer. If this is less than *
* requested, then it indicates that the data holding tank buffer is exhausted. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/03/1996 JLB : Created. *
*=============================================================================================*/
int BufferStraw::Get(void * source, int slen)
{
int total = 0;
if (Is_Valid() && source != NULL && slen > 0) {
int len = slen;
if (BufferPtr.Get_Size() != 0) {
int theoretical_max = BufferPtr.Get_Size() - Index;
len = (slen < theoretical_max) ? slen : theoretical_max;
}
if (len > 0) {
memmove(source, ((char*)BufferPtr.Get_Buffer()) + Index, len);
}
Index += len;
// Length -= len;
// BufferPtr = ((char *)BufferPtr) + len;
total += len;
}
return(total);
}
//---------------------------------------------------------------------------------------------------------
// FileStraw
//---------------------------------------------------------------------------------------------------------
/***********************************************************************************************
* FileStraw::Get -- Fetch data from the file. *
* *
* This routine will read data from the file (as specified in the straw's constructor) into *
* the buffer indicated. *
* *
* INPUT: source -- Pointer to the buffer to hold the data. *
* *
* length -- The number of bytes requested. *
* *
* OUTPUT: Returns with the number of bytes stored into the buffer. If this number is less *
* than the number requested, then this indicates that the file is exhausted. *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/03/1996 JLB : Created. *
*=============================================================================================*/
int FileStraw::Get(void * source, int slen)
{
if (Valid_File() && source != NULL && slen > 0) {
if (!File->Is_Open()) {
HasOpened = true;
if (!File->Is_Available()) return(0);
if (!File->Open(READ)) return(0);
}
return(File->Read(source, slen));
}
return(0);
}
/***********************************************************************************************
* FileStraw::~FileStraw -- The destructor for the file straw. *
* *
* This destructor only needs to close the file if it was the one to open it. *
* *
* INPUT: none *
* *
* OUTPUT: none *
* *
* WARNINGS: none *
* *
* HISTORY: *
* 07/03/1996 JLB : Created. *
*=============================================================================================*/
FileStraw::~FileStraw(void)
{
if (Valid_File() && HasOpened) {
File->Close();
HasOpened = false;
File = NULL;
}
}