mirror of
https://github.com/ShadauxCat/CATSFC.git
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285 lines
8 KiB
C++
285 lines
8 KiB
C++
/*******************************************************************************
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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 2001 - 2004 John Weidman (jweidman@slip.net)
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(c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
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funkyass (funkyass@spam.shaw.ca),
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Joel Yliluoma (http://iki.fi/bisqwit/)
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Kris Bleakley (codeviolation@hotmail.com),
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Matthew Kendora,
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Nach (n-a-c-h@users.sourceforge.net),
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Peter Bortas (peter@bortas.org) and
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zones (kasumitokoduck@yahoo.com)
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C4 x86 assembler and some C emulation code
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(c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
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_Demo_ (_demo_@zsnes.com), and Nach
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C4 C++ code
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(c) Copyright 2003 Brad Jorsch
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DSP-1 emulator code
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(c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
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John Weidman, neviksti (neviksti@hotmail.com),
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Kris Bleakley, Andreas Naive
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DSP-2 emulator code
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(c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
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Lord Nightmare (lord_nightmare@users.sourceforge.net
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OBC1 emulator code
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(c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
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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, John Weidman, and 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 and John Weidman
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S-RTC C emulator code
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(c) Copyright 2001 John Weidman
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ST010 C++ emulator code
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(c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora
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Super FX x86 assembler emulator code
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(c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault
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Super FX C emulator code
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(c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman
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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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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 distribute Snes9x in both binary and
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source form, for non-commercial purposes, is hereby granted without fee,
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providing that this license information and copyright notice appear with
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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.
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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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charging money for Snes9x or software derived from Snes9x.
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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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Cheat.c [Cheat.num_cheats].enabled = enable;
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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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if (enable)
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S9xApplyCheat(Cheat.num_cheats - 1);
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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 required: Overlapping addresses [Neb]
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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 >> MEMMAP_SHIFT) & MEMMAP_MASK;
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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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// Unsave the address for the next call to S9xRemoveCheat.
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Cheat.c [which1].saved = FALSE;
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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 >> MEMMAP_SHIFT) & MEMMAP_MASK;
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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 [8 + MAX_SFCCHEAT_NAME];
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if (!fs)
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return (FALSE);
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while (fread ((void *) data, 1, 8 + MAX_SFCCHEAT_NAME, fs) == 8 + MAX_SFCCHEAT_NAME)
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{
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if (data[6] != 254 || data[7] != 252) {
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fclose (fs);
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return (FALSE);
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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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memcpy (Cheat.c [Cheat.num_cheats].name, &data [8], MAX_SFCCHEAT_NAME - 1);
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Cheat.c [Cheat.num_cheats++].name [MAX_SFCCHEAT_NAME - 1] = 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 [8 + MAX_SFCCHEAT_NAME];
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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, 8 + MAX_SFCCHEAT_NAME);
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data [6] = 254;
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data [7] = 252;
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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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memcpy (&data [8], Cheat.c [i].name, MAX_SFCCHEAT_NAME - 1);
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if (fwrite (data, 8 + MAX_SFCCHEAT_NAME, 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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fclose (fs);
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return (TRUE);
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}
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