CCFILE.H

//
// 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/CCFILE.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 : Command & Conquer                                            *
 *                                                                                             *
 *                    File Name : CCFILE.H                                                     *
 *                                                                                             *
 *                   Programmer : Joe L. Bostic                                                *
 *                                                                                             *
 *                   Start Date : October 17, 1994                                             *
 *                                                                                             *
 *                  Last Update : October 17, 1994   [JLB]                                     *
 *                                                                                             *
 *---------------------------------------------------------------------------------------------*
 * Functions:                                                                                  *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

#ifndef CCFILE_H
#define CCFILE_H

//#include	<wwlib32.h>
#include	<limits.h>
#include	"mixfile.h"
#include	"cdfile.h"
#include	"buff.h"


/*
**	This derived class for file access knows about mixfiles (packed files). It can handle opening
**	a file that is embedded within a mixfile. This is true if the mixfile is cached or resides on
**	disk. It is functionally similar to pakfiles, except much faster and less RAM intensive.
*/
class CCFileClass : public CDFileClass
{
	public:
		CCFileClass(char const * filename);
		CCFileClass(void);
		virtual ~CCFileClass(void) {Position = 0;};

		// Delete should be overloaded here as well. Don't allow deletes of mixfiles.

		bool Is_Resident(void) const {return(Data.Get_Buffer() != NULL);}
		virtual int Is_Available(int forced=false);
		virtual int Is_Open(void) const;
		virtual int Open(char const * filename, int rights=READ) {Set_Name(filename);return Open(rights);};
		virtual int Open(int rights=READ);
		virtual long Read(void * buffer, long size);
		virtual long Seek(long pos, int dir=SEEK_CUR);
		virtual long Size(void);
		virtual long Write(void const * buffer, long size);
		virtual void Close(void);
		virtual unsigned long Get_Date_Time(void);
		virtual bool Set_Date_Time(unsigned long datetime);
		virtual void Error(int error, int canretry = false, char const * filename=NULL);

	private:

		/*
		**	This indicates the file is actually part of a resident image of the mixfile
		**	itself. In this case, the embedded file handle is invalid. All file access actually
		**	gets routed through the cached version of the file. This is a pointer to the start
		**	of the RAM image of the file.
		*/
		::Buffer Data;
//		void * Pointer;

		/*
		**	This is the size of the file if it was embedded in a mixfile. The size must be manually
		**	kept track of because the DOS file size is invalid.
		*/
//		long Length;

		/*
		**	This is the current seek position of the file. It is duplicated here if the file is
		**	part of a mixfile since the DOS seek position is not accurate. This value will
		**	range from zero to the size of the file in bytes.
		*/
		long Position;

		// Force these to never be invoked.
		CCFileClass const & operator = (CCFileClass const & c);
		CCFileClass (CCFileClass const & );
};

template <> class MixFileClass<CDFileClass>;

#endif