149 lines
8.9 KiB
C++
149 lines
8.9 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/XSTRAW.CPP 1 3/03/97 10:26a 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 : XSTRAW.CPP *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : 07/04/96 *
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* *
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* Last Update : July 4, 1996 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* BufferStraw::Get -- Fetch data from the straw's buffer holding tank. *
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* FileStraw::Get -- Fetch data from the file. *
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* FileStraw::~FileStraw -- The destructor for the file straw. *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "FUNCTION.H"
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#include "xstraw.h"
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#include <stddef.h>
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#include <string.h>
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//---------------------------------------------------------------------------------------------------------
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// BufferStraw
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//---------------------------------------------------------------------------------------------------------
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/***********************************************************************************************
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* BufferStraw::Get -- Fetch data from the straw's buffer holding tank. *
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* *
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* This routine will copy the requested number of bytes from the buffer holding tank (as *
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* set up by the straw's constructor) to the buffer specified. *
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* *
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* INPUT: source -- Pointer to the buffer to be filled with data. *
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* *
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* length -- The number of bytes requested. *
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* *
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* OUTPUT: Returns with the number of bytes copied to the buffer. If this is less than *
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* requested, then it indicates that the data holding tank buffer is exhausted. *
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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 BufferStraw::Get(void * source, int slen)
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{
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int total = 0;
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if (Is_Valid() && source != NULL && slen > 0) {
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int len = slen;
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if (BufferPtr.Get_Size() != 0) {
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int theoretical_max = BufferPtr.Get_Size() - Index;
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len = (slen < theoretical_max) ? slen : theoretical_max;
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}
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if (len > 0) {
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memmove(source, ((char*)BufferPtr.Get_Buffer()) + Index, len);
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}
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Index += len;
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// Length -= len;
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// BufferPtr = ((char *)BufferPtr) + len;
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total += len;
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}
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return(total);
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}
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//---------------------------------------------------------------------------------------------------------
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// FileStraw
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//---------------------------------------------------------------------------------------------------------
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/***********************************************************************************************
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* FileStraw::Get -- Fetch data from the file. *
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* *
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* This routine will read data from the file (as specified in the straw's constructor) into *
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* the buffer indicated. *
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* *
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* INPUT: source -- Pointer to the buffer to hold the data. *
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* *
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* length -- The number of bytes requested. *
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* *
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* OUTPUT: Returns with the number of bytes stored into the buffer. If this number is less *
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* than the number requested, then this indicates that the file is exhausted. *
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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 FileStraw::Get(void * source, int slen)
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{
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if (Valid_File() && source != NULL && slen > 0) {
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if (!File->Is_Open()) {
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HasOpened = true;
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if (!File->Is_Available()) return(0);
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if (!File->Open(READ)) return(0);
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}
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return(File->Read(source, slen));
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}
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return(0);
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}
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/***********************************************************************************************
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* FileStraw::~FileStraw -- The destructor for the file straw. *
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* *
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* This destructor only needs to close the file if it was the one to open it. *
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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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FileStraw::~FileStraw(void)
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{
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if (Valid_File() && HasOpened) {
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File->Close();
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HasOpened = false;
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File = NULL;
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}
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}
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