CnC_Remastered_Collection/REDALERT/CDFILE.H

117 lines
5.0 KiB
C++

//
// Copyright 2020 Electronic Arts Inc.
//
// TiberianDawn.DLL and RedAlert.dll and corresponding source code 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.
// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
// in the hope that it will be useful, but with permitted additional restrictions
// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
// distributed with this program. You should have received a copy of the
// GNU General Public License along with permitted additional restrictions
// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
/* $Header: /CounterStrike/CDFILE.H 1 3/03/97 10:24a 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 : Westwood LIbrary *
* *
* File Name : CDFILE.H *
* *
* Programmer : Joe L. Bostic *
* *
* Start Date : October 18, 1994 *
* *
* Last Update : October 18, 1994 [JLB] *
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#ifndef CDFILE_H
#define CDFILE_H
#include <dos.h>
#include "bfiofile.h"
/*
** This class is derived from the BufferIOFileClass. This class adds the functionality of searching
** across multiple directories or drives. It is designed for the typical case of a CD-ROM game
** were some data exists in the current directory (hard drive) and the rest exists on the CD-ROM.
** Searching for the file occurs by first examining the current directory. If the file does not
** exist there, then all the paths available are examined in turn until the file can be found.
** For opening files to write, only the current directory is examined. The directory search order
** is controlled by the path list as submitted to Set_Search_Drives(). The format of the path
** string is the same as the DOS path string.
*/
class CDFileClass : public BufferIOFileClass
{
public:
CDFileClass(char const *filename);
CDFileClass(void);
virtual ~CDFileClass(void) {};
virtual char const * Set_Name(char const *filename);
virtual int Open(char const *filename, int rights=READ);
virtual int Open(int rights=READ);
void Searching(int on) {IsDisabled = !on;};
static bool Is_There_Search_Drives(void) {return(First != NULL);};
static int Set_Search_Drives(char * pathlist);
static void Add_Search_Drive(char *path);
static void Clear_Search_Drives(void);
static void Refresh_Search_Drives(void);
static void Set_CD_Drive(int drive);
static int Get_CD_Drive(void) {return(CurrentCDDrive);};
static int Get_Last_CD_Drive(void) {return(LastCDDrive);};
// RawPath will overflow if we keep setting the path. ST - 1/23/2019 11:12AM
static void Reset_Raw_Path(void) { RawPath[0] = 0; }
// Need to access the paths. ST - 3/15/2019 2:14PM
static const char *Get_Search_Path(int index);
private:
/*
** Is multi-drive searching disabled for this file object?
*/
unsigned IsDisabled:1;
/*
** This is the control record for each of the drives specified in the search
** path. There can be many such search paths available.
*/
typedef struct {
void * Next; // Pointer to next search record.
char const * Path; // Pointer to path string.
} SearchDriveType;
/*
** This points to the first path record.
*/
static SearchDriveType * First;
/*
** This is a copy of the unparsed search path list
*/
static char RawPath[512];
/*
** The drive letter of the current cd drive
*/
static int CurrentCDDrive;
/*
** The drive letter of the last used CD drive
*/
static int LastCDDrive;
};
#endif