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file.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2004 The ScummVM project
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/common/file.h,v 1.30 2004/11/27 15:09:52 fingolfin Exp $
 *
 */

#ifndef COMMON_FILE_H
#define COMMON_FILE_H

#include "stdafx.h"
#include "common/scummsys.h"
#include "common/str.h"
#include "common/stream.h"

class File : public Common::ReadStream, public Common::WriteStream {
protected:
      /** POSIX file handle to the actual file; 0 if no file is open. */
      FILE *_handle;
      
      /** Status flag which tells about recent I/O failures. */
      bool _ioFailed;
      
      /** Simple ref-counter for File objects. */
      int32 _refcount;

      /** The name of this file, for debugging. */
      Common::String _name;


      static Common::StringList _defaultDirectories;

public:
      enum AccessMode {
            kFileReadMode = 1,
            kFileWriteMode = 2
      };
      
      static void addDefaultDirectory(const Common::String &directory);
      static void resetDefaultDirectories();
      
      File();
      virtual ~File();

      void incRef();
      void decRef();

      virtual bool open(const char *filename, AccessMode mode = kFileReadMode, const char *directory = NULL);
      virtual bool exists(const char *filename, const char *directory = NULL);

      virtual void close();
      bool isOpen() const;
      bool ioFailed() const;
      void clearIOFailed();
      virtual bool eof();
      virtual uint32 pos();
      virtual uint32 size();
      const char *name() const { return _name.c_str(); }
      virtual void seek(int32 offs, int whence = SEEK_SET);
      uint32 read(void *ptr, uint32 size);
      uint32 write(const void *ptr, uint32 size);
      char *gets(void *ptr, uint32 size);
};

#endif

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