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dborth
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/**********************************************************************************
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
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Jerremy Koot (jkoot@snes9x.com)
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(c) Copyright 2002 - 2004 Matthew Kendora
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(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
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(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
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(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
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(c) Copyright 2002 - 2006 Brad Jorsch (anomie@users.sourceforge.net),
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funkyass (funkyass@spam.shaw.ca),
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Kris Bleakley (codeviolation@hotmail.com),
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Nach (n-a-c-h@users.sourceforge.net), and
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zones (kasumitokoduck@yahoo.com)
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BS-X C emulator code
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(c) Copyright 2005 - 2006 Dreamer Nom,
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zones
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C4 x86 assembler and some C emulation code
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(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
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Nach,
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zsKnight (zsknight@zsnes.com)
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C4 C++ code
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(c) Copyright 2003 - 2006 Brad Jorsch,
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Nach
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DSP-1 emulator code
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(c) Copyright 1998 - 2006 _Demo_,
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Andreas Naive (andreasnaive@gmail.com)
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Gary Henderson,
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Ivar (ivar@snes9x.com),
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John Weidman,
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Kris Bleakley,
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Matthew Kendora,
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Nach,
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neviksti (neviksti@hotmail.com)
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DSP-2 emulator code
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(c) Copyright 2003 John Weidman,
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Kris Bleakley,
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Lord Nightmare (lord_nightmare@users.sourceforge.net),
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Matthew Kendora,
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neviksti
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DSP-3 emulator code
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(c) Copyright 2003 - 2006 John Weidman,
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Kris Bleakley,
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Lancer,
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z80 gaiden
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DSP-4 emulator code
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(c) Copyright 2004 - 2006 Dreamer Nom,
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John Weidman,
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Kris Bleakley,
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Nach,
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z80 gaiden
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OBC1 emulator code
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(c) Copyright 2001 - 2004 zsKnight,
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pagefault (pagefault@zsnes.com),
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Kris Bleakley,
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Ported from x86 assembler to C by sanmaiwashi
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SPC7110 and RTC C++ emulator code
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(c) Copyright 2002 Matthew Kendora with research by
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zsKnight,
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John Weidman,
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Dark Force
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S-DD1 C emulator code
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(c) Copyright 2003 Brad Jorsch with research by
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Andreas Naive,
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John Weidman
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S-RTC C emulator code
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(c) Copyright 2001-2006 byuu,
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John Weidman
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ST010 C++ emulator code
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(c) Copyright 2003 Feather,
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John Weidman,
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Kris Bleakley,
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Matthew Kendora
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Super FX x86 assembler emulator code
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(c) Copyright 1998 - 2003 _Demo_,
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pagefault,
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zsKnight,
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Super FX C emulator code
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(c) Copyright 1997 - 1999 Ivar,
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Gary Henderson,
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John Weidman
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Sound DSP emulator code is derived from SNEeSe and OpenSPC:
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(c) Copyright 1998 - 2003 Brad Martin
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(c) Copyright 1998 - 2006 Charles Bilyue'
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SH assembler code partly based on x86 assembler code
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(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
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2xSaI filter
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(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
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HQ2x filter
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(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
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Specific ports contains the works of other authors. See headers in
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individual files.
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Snes9x homepage: http://www.snes9x.com
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Permission to use, copy, modify and/or distribute Snes9x in both binary
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and source form, for non-commercial purposes, is hereby granted without
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fee, providing that this license information and copyright notice appear
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with all copies and any derived work.
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This software is provided 'as-is', without any express or implied
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warranty. In no event shall the authors be held liable for any damages
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arising from the use of this software or it's derivatives.
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Snes9x is freeware for PERSONAL USE only. Commercial users should
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seek permission of the copyright holders first. Commercial use includes,
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but is not limited to, charging money for Snes9x or software derived from
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Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
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using Snes9x as a promotion for your commercial product.
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The copyright holders request that bug fixes and improvements to the code
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should be forwarded to them so everyone can benefit from the modifications
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in future versions.
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Super NES and Super Nintendo Entertainment System are trademarks of
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Nintendo Co., Limited and its subsidiary companies.
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**********************************************************************************/
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include "snes9x.h"
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#include "cheats.h"
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#include "memmap.h"
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extern SCheatData Cheat;
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void S9xInitCheatData ()
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{
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Cheat.RAM = Memory.RAM;
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Cheat.SRAM = ::SRAM;
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Cheat.FillRAM = Memory.FillRAM;
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}
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void S9xAddCheat (bool8 enable, bool8 save_current_value,
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uint32 address, uint8 byte)
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{
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if (Cheat.num_cheats < sizeof (Cheat.c) / sizeof (Cheat. c [0]))
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{
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Cheat.c [Cheat.num_cheats].address = address;
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Cheat.c [Cheat.num_cheats].byte = byte;
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#ifdef __MACOSX__
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Cheat.c [Cheat.num_cheats].enabled = enable;
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#else
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Cheat.c [Cheat.num_cheats].enabled = TRUE;
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#endif
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if (save_current_value)
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{
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Cheat.c [Cheat.num_cheats].saved_byte = S9xGetByte (address);
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Cheat.c [Cheat.num_cheats].saved = TRUE;
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}
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Cheat.num_cheats++;
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}
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}
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void S9xDeleteCheat (uint32 which1)
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{
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if (which1 < Cheat.num_cheats)
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{
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if (Cheat.c [which1].enabled)
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S9xRemoveCheat (which1);
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memmove (&Cheat.c [which1], &Cheat.c [which1 + 1],
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sizeof (Cheat.c [0]) * (Cheat.num_cheats - which1 - 1));
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Cheat.num_cheats--; //MK: This used to set it to 0??
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}
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}
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void S9xDeleteCheats ()
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{
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S9xRemoveCheats ();
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Cheat.num_cheats = 0;
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}
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void S9xEnableCheat (uint32 which1)
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{
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if (which1 < Cheat.num_cheats && !Cheat.c [which1].enabled)
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{
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Cheat.c [which1].enabled = TRUE;
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S9xApplyCheat (which1);
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}
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}
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void S9xDisableCheat (uint32 which1)
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{
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if (which1 < Cheat.num_cheats && Cheat.c [which1].enabled)
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{
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S9xRemoveCheat (which1);
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Cheat.c [which1].enabled = FALSE;
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}
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}
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void S9xRemoveCheat (uint32 which1)
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{
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if (Cheat.c [which1].saved)
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{
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uint32 address = Cheat.c [which1].address;
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int block = ((address&0xffffff) >> MEMMAP_SHIFT);
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uint8 *ptr = Memory.Map [block];
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if (ptr >= (uint8 *) CMemory::MAP_LAST)
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*(ptr + (address & 0xffff)) = Cheat.c [which1].saved_byte;
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else
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S9xSetByte (Cheat.c [which1].saved_byte, address);
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}
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}
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void S9xApplyCheat (uint32 which1)
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{
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uint32 address = Cheat.c [which1].address;
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if (!Cheat.c [which1].saved)
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Cheat.c [which1].saved_byte = S9xGetByte (address);
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int block = ((address&0xffffff) >> MEMMAP_SHIFT);
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uint8 *ptr = Memory.Map [block];
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if (ptr >= (uint8 *) CMemory::MAP_LAST)
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*(ptr + (address & 0xffff)) = Cheat.c [which1].byte;
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else
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S9xSetByte (Cheat.c [which1].byte, address);
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Cheat.c [which1].saved = TRUE;
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}
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void S9xApplyCheats ()
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{
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if (Settings.ApplyCheats)
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{
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for (uint32 i = 0; i < Cheat.num_cheats; i++)
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if (Cheat.c [i].enabled)
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S9xApplyCheat (i);
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}
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}
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void S9xRemoveCheats ()
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{
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for (uint32 i = 0; i < Cheat.num_cheats; i++)
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if (Cheat.c [i].enabled)
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S9xRemoveCheat (i);
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}
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bool8 S9xLoadCheatFile (const char *filename)
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{
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Cheat.num_cheats = 0;
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FILE *fs = fopen (filename, "rb");
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uint8 data [28];
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if (!fs)
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return (FALSE);
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while (fread ((void *) data, 1, 28, fs) == 28)
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{
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Cheat.c [Cheat.num_cheats].enabled = (data [0] & 4) == 0;
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Cheat.c [Cheat.num_cheats].byte = data [1];
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Cheat.c [Cheat.num_cheats].address = data [2] | (data [3] << 8) | (data [4] << 16);
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Cheat.c [Cheat.num_cheats].saved_byte = data [5];
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Cheat.c [Cheat.num_cheats].saved = (data [0] & 8) != 0;
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memmove (Cheat.c [Cheat.num_cheats].name, &data [8], 20);
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Cheat.c [Cheat.num_cheats++].name [20] = 0;
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}
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fclose (fs);
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return (TRUE);
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}
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bool8 S9xSaveCheatFile (const char *filename)
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{
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if (Cheat.num_cheats == 0)
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{
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(void) remove (filename);
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return (TRUE);
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}
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FILE *fs = fopen (filename, "wb");
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uint8 data [28];
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if (!fs)
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return (FALSE);
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uint32 i;
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for (i = 0; i < Cheat.num_cheats; i++)
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{
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memset (data, 0, 28);
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if (i == 0)
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{
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data [6] = 254;
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data [7] = 252;
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}
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if (!Cheat.c [i].enabled)
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data [0] |= 4;
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if (Cheat.c [i].saved)
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data [0] |= 8;
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data [1] = Cheat.c [i].byte;
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data [2] = (uint8) Cheat.c [i].address;
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data [3] = (uint8) (Cheat.c [i].address >> 8);
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data [4] = (uint8) (Cheat.c [i].address >> 16);
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data [5] = Cheat.c [i].saved_byte;
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memmove (&data [8], Cheat.c [i].name, 19);
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if (fwrite (data, 28, 1, fs) != 1)
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{
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fclose (fs);
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return (FALSE);
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}
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}
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return (fclose (fs) == 0);
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}
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