text: /***********************************************************************************
    Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
  
    (c) Copyright 1996 - 2002  Gary Henderson (gary.henderson@ntlworld.com),
                               Jerremy Koot (jkoot@snes9x.com)
  
    (c) Copyright 2002 - 2004  Matthew Kendora
  
    (c) Copyright 2002 - 2005  Peter Bortas (peter@bortas.org)
  
    (c) Copyright 2004 - 2005  Joel Yliluoma (http://iki.fi/bisqwit/)
  
    (c) Copyright 2001 - 2006  John Weidman (jweidman@slip.net)
  
    (c) Copyright 2002 - 2006  funkyass (funkyass@spam.shaw.ca),
                               Kris Bleakley (codeviolation@hotmail.com)
  
    (c) Copyright 2002 - 2010  Brad Jorsch (anomie@users.sourceforge.net),
                               Nach (n-a-c-h@users.sourceforge.net),
  
    (c) Copyright 2002 - 2011  zones (kasumitokoduck@yahoo.com)
  
    (c) Copyright 2006 - 2007  nitsuja
  
    (c) Copyright 2009 - 2011  BearOso,
                               OV2
  
    (c) Copyright 2011 - 2016  Hans-Kristian Arntzen,
                               Daniel De Matteis
                               (Under no circumstances will commercial rights be given)
  
  
    BS-X C emulator code
    (c) Copyright 2005 - 2006  Dreamer Nom,
                               zones
  
    C4 x86 assembler and some C emulation code
    (c) Copyright 2000 - 2003  _Demo_ (_demo_@zsnes.com),
                               Nach,
                               zsKnight (zsknight@zsnes.com)
  
    C4 C++ code
    (c) Copyright 2003 - 2006  Brad Jorsch,
                               Nach
  
    DSP-1 emulator code
    (c) Copyright 1998 - 2006  _Demo_,
                               Andreas Naive (andreasnaive@gmail.com),
                               Gary Henderson,
                               Ivar (ivar@snes9x.com),
                               John Weidman,
                               Kris Bleakley,
                               Matthew Kendora,
                               Nach,
                               neviksti (neviksti@hotmail.com)
  
    DSP-2 emulator code
    (c) Copyright 2003         John Weidman,
                               Kris Bleakley,
                               Lord Nightmare (lord_nightmare@users.sourceforge.net),
                               Matthew Kendora,
                               neviksti
  
    DSP-3 emulator code
    (c) Copyright 2003 - 2006  John Weidman,
                               Kris Bleakley,
                               Lancer,
                               z80 gaiden
  
    DSP-4 emulator code
    (c) Copyright 2004 - 2006  Dreamer Nom,
                               John Weidman,
                               Kris Bleakley,
                               Nach,
                               z80 gaiden
  
    OBC1 emulator code
    (c) Copyright 2001 - 2004  zsKnight,
                               pagefault (pagefault@zsnes.com),
                               Kris Bleakley
                               Ported from x86 assembler to C by sanmaiwashi
  
    SPC7110 and RTC C++ emulator code used in 1.39-1.51
    (c) Copyright 2002         Matthew Kendora with research by
                               zsKnight,
                               John Weidman,
                               Dark Force
  
    SPC7110 and RTC C++ emulator code used in 1.52+
    (c) Copyright 2009         byuu,
                               neviksti
  
    S-DD1 C emulator code
    (c) Copyright 2003         Brad Jorsch with research by
                               Andreas Naive,
                               John Weidman
  
    S-RTC C emulator code
    (c) Copyright 2001 - 2006  byuu,
                               John Weidman
  
    ST010 C++ emulator code
    (c) Copyright 2003         Feather,
                               John Weidman,
                               Kris Bleakley,
                               Matthew Kendora
  
    Super FX x86 assembler emulator code
    (c) Copyright 1998 - 2003  _Demo_,
                               pagefault,
                               zsKnight
  
    Super FX C emulator code
    (c) Copyright 1997 - 1999  Ivar,
                               Gary Henderson,
                               John Weidman
  
    Sound emulator code used in 1.5-1.51
    (c) Copyright 1998 - 2003  Brad Martin
    (c) Copyright 1998 - 2006  Charles Bilyue'
  
    Sound emulator code used in 1.52+
    (c) Copyright 2004 - 2007  Shay Green (gblargg@gmail.com)
  
    SH assembler code partly based on x86 assembler code
    (c) Copyright 2002 - 2004  Marcus Comstedt (marcus@mc.pp.se)
  
    2xSaI filter
    (c) Copyright 1999 - 2001  Derek Liauw Kie Fa
  
    HQ2x, HQ3x, HQ4x filters
    (c) Copyright 2003         Maxim Stepin (maxim@hiend3d.com)
  
    NTSC filter
    (c) Copyright 2006 - 2007  Shay Green
  
    GTK+ GUI code
    (c) Copyright 2004 - 2011  BearOso
  
    Win32 GUI code
    (c) Copyright 2003 - 2006  blip,
                               funkyass,
                               Matthew Kendora,
                               Nach,
                               nitsuja
    (c) Copyright 2009 - 2011  OV2
  
    Mac OS GUI code
    (c) Copyright 1998 - 2001  John Stiles
    (c) Copyright 2001 - 2011  zones
  
    Libretro port
    (c) Copyright 2011 - 2016  Hans-Kristian Arntzen,
                               Daniel De Matteis
                               (Under no circumstances will commercial rights be given)
  
  
    Specific ports contains the works of other authors. See headers in
    individual files.
  
  
    Snes9x homepage: http://www.snes9x.com/
  
    Permission to use, copy, modify and/or distribute Snes9x in both binary
    and source form, for non-commercial purposes, is hereby granted without
    fee, providing that this license information and copyright notice appear
    with all copies and any derived work.
  
    This software is provided 'as-is', without any express or implied
    warranty. In no event shall the authors be held liable for any damages
    arising from the use of this software or it's derivatives.
  
    Snes9x is freeware for PERSONAL USE only. Commercial users should
    seek permission of the copyright holders first. Commercial use includes,
    but is not limited to, charging money for Snes9x or software derived from
    Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
    using Snes9x as a promotion for your commercial product.
  
    The copyright holders request that bug fixes and improvements to the code
    should be forwarded to them so everyone can benefit from the modifications
    in future versions.
  
    Super NES and Super Nintendo Entertainment System are trademarks of
    Nintendo Co., Limited and its subsidiary companies.
   ***********************************************************************************/
  
  
  #ifndef _STREAM_H_
  #define _STREAM_H_
  
  #include <string>
  
  class Stream
  {
  	public:
  		Stream (void);
  		virtual ~Stream (void);
  		virtual int get_char (void) = 0;
  		virtual char * gets (char *, size_t) = 0;
  		virtual char * getline (void);	// free() when done
  		virtual std::string getline (bool &);
  		virtual size_t read (void *, size_t) = 0;
          virtual size_t write (void *, size_t) = 0;
          virtual size_t pos (void) = 0;
          virtual size_t size (void) = 0;
          virtual int revert (size_t from, size_t offset) = 0;
          virtual void closeStream() = 0;
  };
  
  class fStream : public Stream
  {
  	public:
  		fStream (FSTREAM);
  		virtual ~fStream (void);
  		virtual int get_char (void);
  		virtual char * gets (char *, size_t);
  		virtual size_t read (void *, size_t);
          virtual size_t write (void *, size_t);
          virtual size_t pos (void);
          virtual size_t size (void);
          virtual int revert (size_t from, size_t offset);
          virtual void closeStream();
  
  	private:
  		FSTREAM	fp;
  };
  
  #ifdef UNZIP_SUPPORT
  
  #include "unzip.h"
  
  #define unz_BUFFSIZ	1024
  
  class unzStream : public Stream
  {
  	public:
  		unzStream (unzFile &);
  		virtual ~unzStream (void);
  		virtual int get_char (void);
  		virtual char * gets (char *, size_t);
  		virtual size_t read (void *, size_t);
          virtual size_t write (void *, size_t);
          virtual size_t pos (void);
          virtual size_t size (void);
          virtual int revert (size_t from, size_t offset);
          virtual void closeStream();
  
  	private:
  		unzFile	file;
  		char	buffer[unz_BUFFSIZ];
  		char	*head;
  		size_t	numbytes;
  };
  
  #endif
  
  class memStream : public Stream
  {
  	public:
          memStream (uint8 *,size_t);
          memStream (const uint8 *,size_t);
  		virtual ~memStream (void);
  		virtual int get_char (void);
  		virtual char * gets (char *, size_t);
  		virtual size_t read (void *, size_t);
          virtual size_t write (void *, size_t);
          virtual size_t pos (void);
          virtual size_t size (void);
          virtual int revert (size_t from, size_t offset);
          virtual void closeStream();
  
  	private:
  		uint8   *mem;
          size_t  msize;
          size_t  remaining;
  		uint8	*head;
          bool    readonly;
  };
  
  /* dummy stream that always reads 0 and writes nowhere
     but counts bytes written
  */
  class nulStream : public Stream
  {
  	public:
          nulStream (void);
  		virtual ~nulStream (void);
          virtual int get_char (void);
          virtual char * gets (char *, size_t);
  		virtual size_t read (void *, size_t);
          virtual size_t write (void *, size_t);
          virtual size_t pos (void);
          virtual size_t size (void);
          virtual int revert (size_t from, size_t offset);
          virtual void closeStream();
  
      private:
          size_t  bytes_written;
  };
  
  Stream *openStreamFromFSTREAM(const char* filename, const char* mode);
  Stream *reopenStreamFromFd(int fd, const char* mode);
  
  
  #endif
  