mirror of
https://github.com/electronicarts/CnC_Remastered_Collection
synced 2024-04-29 09:52:36 +12:00
03416d24e1
Initial commit of original Tiberian Dawn and Red Alert source code converted to build as DLLs, and compatible with the release version of Command & Conquer Remastered.
626 lines
28 KiB
C++
626 lines
28 KiB
C++
//
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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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/***********************************************************************************************
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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 : CCFILE.CPP *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : August 8, 1994 *
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* *
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* Last Update : March 20, 1995 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* CCFileClass::CCFileClass -- Default constructor for file object. *
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* CCFileClass::CCFileClass -- Filename based constructor for C&C file. *
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* CCFileClass::Close -- Closes the file. *
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* CCFileClass::Is_Available -- Checks for existence of file on disk or in mixfile. *
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* CCFileClass::Is_Open -- Determines if the file is open. *
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* CCFileClass::Open -- Opens a file from either the mixfile system or the rawfile system. *
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* CCFileClass::Read -- Reads data from the file. *
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* CCFileClass::Seek -- Moves the current file pointer in the file. *
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* CCFileClass::Size -- Determines the size of the file. *
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* CCFileClass::Write -- Writes data to the file (non mixfile files only). *
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* CCFileClass::Error -- Handles displaying a file error message. *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "function.h"
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//#include <direct.h>
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//#include <fcntl.h>
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//#include <io.h>
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//#include <dos.h>
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//#include <errno.h>
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//#include <share.h>
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//#include "ccfile.h"
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/***********************************************************************************************
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* CCFileClass::Error -- Handles displaying a file error message. *
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* *
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* Display an error message as indicated. If it is allowed to retry, then pressing a key *
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* will return from this function. Otherwise, it will exit the program with "exit()". *
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* *
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* INPUT: error -- The error number (same as the DOSERR.H error numbers). *
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* *
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* canretry -- Can this routine exit normally so that retrying can occur? If this is *
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* false, then the program WILL exit in this routine. *
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* *
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* filename -- Optional filename to report with this error. If no filename is *
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* supplied, then no filename is listed in the error message. *
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* *
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* OUTPUT: none, but this routine might not return at all if the "canretry" parameter is *
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* false or the player pressed ESC. *
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* *
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* WARNINGS: This routine may not return at all. It handles being in text mode as well as *
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* if in a graphic mode. *
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* *
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* HISTORY: *
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* 10/17/1994 JLB : Created. *
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*=============================================================================================*/
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void CCFileClass::Error(int , int , char const * )
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{
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#ifdef DEMO
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if (strstr(File_Name(), "\\")) {
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if (!Force_CD_Available(-1)) {
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Prog_End();
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if (!RunningAsDLL) {
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exit(EXIT_FAILURE);
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}
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}
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}
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#else
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if (!Force_CD_Available(RequiredCD)) {
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Prog_End("CCFileClass::Error CD not found", true);
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if (!RunningAsDLL) {
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exit(EXIT_FAILURE);
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}
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}
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#endif
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}
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/***********************************************************************************************
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* CCFileClass::CCFileClass -- Filename based constructor for C&C file. *
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* *
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* Use this constructor for a file when the filename is known at construction time. *
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* *
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* INPUT: filename -- Pointer to the filename to use for this file object. *
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* *
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* OUTPUT: none *
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* *
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* WARNINGS: The filename pointer is presumed to be inviolate throughout the duration of *
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* the file object. If this is not guaranteed, then use the default constructor *
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* and then set the name manually. *
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* *
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* HISTORY: *
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* 03/20/1995 JLB : Created. *
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*=============================================================================================*/
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CCFileClass::CCFileClass(char const *filename) :
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CDFileClass(),
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FromDisk(false),
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Pointer(0),
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Position(0),
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Length(0),
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Start(0)
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{
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Set_Name(filename);
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}
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/***********************************************************************************************
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* CCFileClass::CCFileClass -- Default constructor for file object. *
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* *
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* This is the default constructor for a C&C file object. *
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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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* 03/20/1995 JLB : Created. *
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*=============================================================================================*/
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CCFileClass::CCFileClass(void)
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{
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FromDisk = false;
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Pointer = 0;
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Position = 0;
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Length = 0;
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Start = 0;
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}
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/***********************************************************************************************
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* CCFileClass::Write -- Writes data to the file (non mixfile files only). *
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* *
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* This routine will write data to the file, but NOT to a file that is part of a mixfile. *
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* *
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* INPUT: buffer -- Pointer to the buffer that holds the data to be written. *
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* *
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* size -- The number of bytes to write. *
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* *
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* OUTPUT: Returns the number of bytes actually written. *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 08/08/1994 JLB : Created. *
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*=============================================================================================*/
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long CCFileClass::Write(void const *buffer, long size)
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{
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/*
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** If this is part of a mixfile, then writing is not allowed. Error out with a fatal
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** message.
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*/
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if (Pointer || FromDisk) {
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Error(EACCES, false, File_Name());
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}
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return(CDFileClass::Write(buffer, size));
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}
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/***********************************************************************************************
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* CCFileClass::Read -- Reads data from the file. *
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* *
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* This routine determines if the file is part of the mixfile system. If it is, then *
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* the file is copied from RAM if it is located there. Otherwise it is read from disk *
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* according to the correct position of the file within the parent mixfile. *
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* *
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* INPUT: buffer -- Pointer to the buffer to place the read data. *
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* *
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* size -- The number of bytes to read. *
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* *
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* OUTPUT: Returns the actual number of bytes read (this could be less than requested). *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 08/08/1994 JLB : Created. *
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*=============================================================================================*/
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long CCFileClass::Read(void *buffer, long size)
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{
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int opened = false;
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if (!Is_Open()) {
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if (Open()) {
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opened = true;
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}
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}
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/*
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** If the file is part of a loaded mixfile, then a mere copy is
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** all that is required for the read.
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*/
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if (Pointer) {
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long maximum = Length - Position;
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size = MIN(maximum, size);
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if (size) {
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Mem_Copy(Add_Long_To_Pointer(Pointer, Position), buffer, size);
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Position += size;
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}
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if (opened) Close();
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return(size);
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}
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/*
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** If the file is part of a mixfile, but the mixfile is located
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** on disk, then a special read operation is necessary.
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*/
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if (FromDisk) {
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long maximum = Length - Position;
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size = MIN(maximum, size);
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if (size > 0) {
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CDFileClass::Seek(Start + Position, SEEK_SET);
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size = CDFileClass::Read(buffer, size);
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Position += size;
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}
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if (opened) Close();
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return(size);
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}
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long s = CDFileClass::Read(buffer, size);
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if (opened) Close();
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return(s);
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}
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/***********************************************************************************************
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* CCFileClass::Seek -- Moves the current file pointer in the file. *
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* *
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* This routine will change the current file pointer to the position specified. It follows *
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* the same rules the a normal Seek() does, but if the file is part of the mixfile system, *
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* then only the position value needs to be updated. *
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* *
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* INPUT: pos -- The position to move the file to relative to the position indicated *
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* by the "dir" parameter. *
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* *
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* dir -- The direction to affect the position change against. This can be *
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* either SEEK_CUR, SEEK_END, or SEEK_SET. *
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* *
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* OUTPUT: Returns with the position of the new location. *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 08/08/1994 JLB : Created. *
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*=============================================================================================*/
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long CCFileClass::Seek(long pos, int dir)
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{
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if (Pointer || FromDisk) {
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switch (dir) {
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case SEEK_END:
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Position = Length;
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break;
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case SEEK_SET:
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Position = 0;
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break;
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case SEEK_CUR:
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default:
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break;
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}
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Position += pos;
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if (Position < 0) Position = 0;
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if (Position > Length) Position = Length;
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return(Position);
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}
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return(CDFileClass::Seek(pos, dir));
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}
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/***********************************************************************************************
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* CCFileClass::Size -- Determines the size of the file. *
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* *
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* If the file is part of the mixfile system, then the size of the file is already *
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* determined and available. Otherwise, go to the low level system to find the file *
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* size. *
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* *
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* INPUT: none *
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* *
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* OUTPUT: Returns with the size of the file in bytes. *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 08/08/1994 JLB : Created. *
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*=============================================================================================*/
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long CCFileClass::Size(void)
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{
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if (Pointer || FromDisk) return(Length);
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return(CDFileClass::Size());
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}
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/***********************************************************************************************
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* CCFileClass::Is_Available -- Checks for existence of file on disk or in mixfile. *
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* *
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* This routine will examine the mixfile system looking for the file. If the file could *
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* not be found there, then the disk is examined directly. *
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* *
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* INPUT: none *
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* *
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* OUTPUT: bool; Is the file available for opening? *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 08/08/1994 JLB : Created. *
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*=============================================================================================*/
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int CCFileClass::Is_Available(int )
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{
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if (MixFileClass::Offset(File_Name())) {
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return(true);
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}
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return(CDFileClass::Is_Available());
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}
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/***********************************************************************************************
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* CCFileClass::Is_Open -- Determines if the file is open. *
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* *
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* A mixfile is open if there is a pointer to the mixfile data. In absence of this, *
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* the the file is open if the file handle is valid. *
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* *
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* INPUT: none *
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* *
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* OUTPUT: bool; Is the file open? *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 08/08/1994 JLB : Created. *
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*=============================================================================================*/
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int CCFileClass::Is_Open(void) const
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{
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/*
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** If the file is part of a cached file, then return that it is opened. A closed file
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** doesn't have a valid pointer.
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*/
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if (Pointer) return(true);
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return(CDFileClass::Is_Open());
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}
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/***********************************************************************************************
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* CCFileClass::Close -- Closes the file. *
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* *
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* If this is a mixfile file, then only the pointers need to be adjusted. *
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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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* 08/08/1994 JLB : Created. *
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*=============================================================================================*/
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void CCFileClass::Close(void)
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{
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FromDisk = false;
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Pointer = 0;
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Position = 0; // Starts at beginning offset.
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Start = 0;
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Length = 0;
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CDFileClass::Close();
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}
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/***********************************************************************************************
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* CCFileClass::Open -- Opens a file from either the mixfile system or the rawfile system. *
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* *
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* This routine will open the specified file. It examines the mixfile system to find a *
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* match. If one is found then the file is "opened" in a special cached way. Otherwise *
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* it is opened as a standard DOS file. *
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* *
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* INPUT: rights -- The access rights desired. *
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* *
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* OUTPUT: bool; Was the file opened successfully? *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 08/08/1994 JLB : Created. *
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*=============================================================================================*/
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int CCFileClass::Open(int rights)
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{
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/*
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** Always close the file if it was open.
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*/
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Close();
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/*
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** Perform a preliminary check to see if the specified file
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** exists on the disk. If it does, then open this file regardless
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** of whether it also exists in RAM. This is slower, but allows
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** upgrade files to work.
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*/
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if ((rights & WRITE) || CDFileClass::Is_Available()) {
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return(CDFileClass::Open(rights));
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}
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/*
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** Check to see if file is part of a mixfile and that mixfile is currently loaded
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** into RAM.
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*/
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MixFileClass *mixfile = 0;
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if (MixFileClass::Offset(File_Name(), &Pointer, &mixfile, &Start, &Length)) {
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/*
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** If the mixfile is located on disk, then fake out the file system to read from
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** the mixfile, but think it is reading from a solitary file.
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*/
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if (!Pointer) {
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long start = Start;
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long length = Length;
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/*
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** This is a legitimate open to the file. All access to the file through this
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** file object will be appropriately adjusted for mixfile support however. Also
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** note that the filename attached to this object is NOT the same as the file
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** attached to the file handle.
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*/
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char const * dupfile = strdup(File_Name());
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Open(mixfile->Filename, READ);
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Searching(false); // Disable multi-drive search.
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Set_Name(dupfile);
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Searching(true);
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if (dupfile) free((void *)dupfile);
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Start = start;
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Length = length;
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FromDisk = true;
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}
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} else {
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/*
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** The file cannot be found in any mixfile, so it must reside as
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** an individual file on the disk. Or else it is just plain missing.
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*/
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return(CDFileClass::Open(rights));
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}
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return(true);
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}
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/***********************************************************************************
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** Backward compatibility section.
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*/
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//extern "C" {
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static CCFileClass Handles[10];
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#ifdef NEVER
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bool __cdecl Set_Search_Drives(char const *)
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{
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CCFileClass::Set_Search_Path(path);
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return(true);
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}
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#endif
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int __cdecl Open_File(char const *file_name, int mode)
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{
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for (int index = 0; index < sizeof(Handles)/sizeof(Handles[0]); index++) {
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if (!Handles[index].Is_Open()) {
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Handles[index].Set_Name(file_name);
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if (Handles[index].Open(mode)) {
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// if (Handles[index].Open(file_name, mode)) {
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return(index);
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}
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break;
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}
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}
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return(WW_ERROR);
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}
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VOID __cdecl Close_File(int handle)
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{
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if (handle != WW_ERROR && Handles[handle].Is_Open()) {
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Handles[handle].Close();
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}
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}
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LONG __cdecl Read_File(int handle, VOID *buf, ULONG bytes)
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{
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if (handle != WW_ERROR && Handles[handle].Is_Open()) {
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return(Handles[handle].Read(buf, bytes));
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}
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return(0);
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}
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LONG __cdecl Write_File(int handle, VOID const *buf, ULONG bytes)
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{
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if (handle != WW_ERROR && Handles[handle].Is_Open()) {
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return(Handles[handle].Write(buf, bytes));
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}
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return(0);
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}
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int __cdecl Find_File(char const *file_name)
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{
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CCFileClass file(file_name);
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return(file.Is_Available());
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}
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#ifdef NEVER
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int __cdecl Delete_File(char const *file_name)
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{
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return(CCFileClass(file_name).Delete());
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}
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int __cdecl Create_File(char const *file_name)
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{
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return(CCFileClass(file_name).Create());
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}
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ULONG __cdecl Load_Data(char const *name, VOID *ptr, ULONG size)
|
|
{
|
|
return(CCFileClass(name).Read(ptr, size));
|
|
}
|
|
#endif
|
|
|
|
VOID * __cdecl Load_Alloc_Data(char const *name, int )
|
|
{
|
|
CCFileClass file(name);
|
|
|
|
return(Load_Alloc_Data(file));
|
|
}
|
|
|
|
ULONG __cdecl File_Size(int handle)
|
|
{
|
|
if (handle != WW_ERROR && Handles[handle].Is_Open()) {
|
|
return(Handles[handle].Size());
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
#ifdef NEVER
|
|
ULONG __cdecl Write_Data(char const *name, VOID const *ptr, ULONG size)
|
|
{
|
|
return(CCFileClass(name).Write(ptr, size));
|
|
}
|
|
#endif
|
|
|
|
ULONG __cdecl Seek_File(int handle, LONG offset, int starting)
|
|
{
|
|
if (handle != WW_ERROR && Handles[handle].Is_Open()) {
|
|
return(Handles[handle].Seek(offset, starting));
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
void WWDOS_Shutdown(void)
|
|
{
|
|
for (int index = 0; index < 10; index++) {
|
|
Handles[index].Set_Name(NULL);
|
|
}
|
|
}
|
|
|
|
#ifdef NEVER
|
|
bool __cdecl Multi_Drive_Search(bool on)
|
|
{
|
|
// return(CCFileClass::Multi_Drive_Search(on));
|
|
return(on);
|
|
}
|
|
|
|
VOID __cdecl WWDOS_Init(VOID)
|
|
{
|
|
}
|
|
|
|
VOID __cdecl WWDOS_Shutdown(VOID)
|
|
{
|
|
}
|
|
|
|
int __cdecl Find_Disk_Number(char const *)
|
|
{
|
|
return(0);
|
|
}
|
|
#endif
|
|
|
|
//ULONG cdecl Load_Uncompress(BYTE const *file, BuffType uncomp_buff, BuffType dest_buff, VOID *reserved_data)
|
|
//{
|
|
// return(Load_Uncompress(CCFileClass(file), uncomp_buff, dest_buff, reserved_data));
|
|
// return(CCFileClass(file).Load_Uncompress(uncomp_buff, dest_buff, reserved_data));
|
|
//}
|
|
|
|
//extern "C" {
|
|
//int MaxDevice;
|
|
//int DefaultDrive;
|
|
//char CallingDOSInt;
|
|
|
|
//}
|
|
|
|
|
|
void Unfragment_File_Cache(void)
|
|
{
|
|
} |