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-/*******************************************************************************
- Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
-
- (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
- Jerremy Koot (jkoot@snes9x.com)
-
- (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)
-
- (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
- funkyass (funkyass@spam.shaw.ca),
- Joel Yliluoma (http://iki.fi/bisqwit/)
- Kris Bleakley (codeviolation@hotmail.com),
- Matthew Kendora,
- Nach (n-a-c-h@users.sourceforge.net),
- Peter Bortas (peter@bortas.org) and
- zones (kasumitokoduck@yahoo.com)
-
- C4 x86 assembler and some C emulation code
- (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
- _Demo_ (_demo_@zsnes.com), and Nach
-
- C4 C++ code
- (c) Copyright 2003 Brad Jorsch
-
- DSP-1 emulator code
- (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
- John Weidman, neviksti (neviksti@hotmail.com),
- Kris Bleakley, Andreas Naive
-
- DSP-2 emulator code
- (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
- Lord Nightmare (lord_nightmare@users.sourceforge.net
-
- OBC1 emulator code
- (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
- Kris Bleakley
- Ported from x86 assembler to C by sanmaiwashi
-
- SPC7110 and RTC C++ emulator code
- (c) Copyright 2002 Matthew Kendora with research by
- zsKnight, John Weidman, and Dark Force
-
- S-DD1 C emulator code
- (c) Copyright 2003 Brad Jorsch with research by
- Andreas Naive and John Weidman
-
- S-RTC C emulator code
- (c) Copyright 2001 John Weidman
-
- ST010 C++ emulator code
- (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora
-
- Super FX x86 assembler emulator code
- (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault
-
- Super FX C emulator code
- (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman
-
-
- SH assembler code partly based on x86 assembler code
- (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
-
-
- 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 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.
-
- Snes9x is freeware for PERSONAL USE only. Commercial users should
- seek permission of the copyright holders first. Commercial use includes
- charging money for Snes9x or software derived from Snes9x.
-
- 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.
-*******************************************************************************/
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#include "snes9x.h"
-#include "cheats.h"
-#include "memmap.h"
-
-extern SCheatData Cheat;
-
-void S9xInitCheatData ()
-{
- Cheat.RAM = Memory.RAM;
- Cheat.SRAM = ::SRAM;
- Cheat.FillRAM = Memory.FillRAM;
-}
-
-void S9xAddCheat (bool8 enable, bool8 save_current_value,
- uint32 address, uint8 byte)
-{
- if (Cheat.num_cheats < sizeof (Cheat.c) / sizeof (Cheat.c [0]))
- {
- Cheat.c [Cheat.num_cheats].address = address;
- Cheat.c [Cheat.num_cheats].byte = byte;
- Cheat.c [Cheat.num_cheats].enabled = enable;
- if (save_current_value)
- {
- Cheat.c [Cheat.num_cheats].saved_byte = S9xGetByte (address);
- Cheat.c [Cheat.num_cheats].saved = TRUE;
- }
- Cheat.num_cheats++;
- if (enable)
- S9xApplyCheat(Cheat.num_cheats - 1);
- }
-}
-
-void S9xDeleteCheat (uint32 which1)
-{
- if (which1 < Cheat.num_cheats)
- {
- if (Cheat.c [which1].enabled)
- S9xRemoveCheat (which1);
-
- // memmove required: Overlapping addresses [Neb]
- memmove (&Cheat.c [which1], &Cheat.c [which1 + 1],
- sizeof (Cheat.c [0]) * (Cheat.num_cheats - which1 - 1));
- Cheat.num_cheats--; //MK: This used to set it to 0??
- }
-}
-
-void S9xDeleteCheats ()
-{
- S9xRemoveCheats ();
- Cheat.num_cheats = 0;
-}
-
-void S9xEnableCheat (uint32 which1)
-{
- if (which1 < Cheat.num_cheats && !Cheat.c [which1].enabled)
- {
- Cheat.c [which1].enabled = TRUE;
- S9xApplyCheat (which1);
- }
-}
-
-void S9xDisableCheat (uint32 which1)
-{
- if (which1 < Cheat.num_cheats && Cheat.c [which1].enabled)
- {
- S9xRemoveCheat (which1);
- Cheat.c [which1].enabled = FALSE;
- }
-}
-
-void S9xRemoveCheat (uint32 which1)
-{
- if (Cheat.c [which1].saved)
- {
- uint32 address = Cheat.c [which1].address;
-
- int block = (address >> MEMMAP_SHIFT) & MEMMAP_MASK;
- uint8 *ptr = Memory.Map [block];
-
- if (ptr >= (uint8 *) CMemory::MAP_LAST)
- *(ptr + (address & 0xffff)) = Cheat.c [which1].saved_byte;
- else
- S9xSetByte (Cheat.c [which1].saved_byte, address);
- // Unsave the address for the next call to S9xRemoveCheat.
- Cheat.c [which1].saved = FALSE;
- }
-}
-
-void S9xApplyCheat (uint32 which1)
-{
- uint32 address = Cheat.c [which1].address;
-
- if (!Cheat.c [which1].saved)
- Cheat.c [which1].saved_byte = S9xGetByte (address);
-
- int block = (address >> MEMMAP_SHIFT) & MEMMAP_MASK;
- uint8 *ptr = Memory.Map [block];
-
- if (ptr >= (uint8 *) CMemory::MAP_LAST)
- *(ptr + (address & 0xffff)) = Cheat.c [which1].byte;
- else
- S9xSetByte (Cheat.c [which1].byte, address);
- Cheat.c [which1].saved = TRUE;
-}
-
-void S9xApplyCheats ()
-{
- if (Settings.ApplyCheats)
- {
- for (uint32 i = 0; i < Cheat.num_cheats; i++)
- if (Cheat.c [i].enabled)
- S9xApplyCheat (i);
- }
-}
-
-void S9xRemoveCheats ()
-{
- for (uint32 i = 0; i < Cheat.num_cheats; i++)
- if (Cheat.c [i].enabled)
- S9xRemoveCheat (i);
-}
-
-bool8 S9xLoadCheatFile (const char *filename)
-{
- Cheat.num_cheats = 0;
-
- FILE *fs = fopen (filename, "rb");
- uint8 data [8 + MAX_SFCCHEAT_NAME];
-
- if (!fs)
- return (FALSE);
-
- while (fread ((void *) data, 1, 8 + MAX_SFCCHEAT_NAME, fs) == 8 + MAX_SFCCHEAT_NAME)
- {
- if (data[6] != 254 || data[7] != 252) {
- fclose (fs);
- return (FALSE);
- }
- Cheat.c [Cheat.num_cheats].enabled = (data [0] & 4) == 0;
- Cheat.c [Cheat.num_cheats].byte = data [1];
- Cheat.c [Cheat.num_cheats].address = data [2] | (data [3] << 8) | (data [4] << 16);
- Cheat.c [Cheat.num_cheats].saved_byte = data [5];
- Cheat.c [Cheat.num_cheats].saved = (data [0] & 8) != 0;
- memcpy (Cheat.c [Cheat.num_cheats].name, &data [8], MAX_SFCCHEAT_NAME - 1);
- Cheat.c [Cheat.num_cheats++].name [MAX_SFCCHEAT_NAME - 1] = 0;
- }
- fclose (fs);
-
- return (TRUE);
-}
-
-bool8 S9xSaveCheatFile (const char *filename)
-{
- if (Cheat.num_cheats == 0)
- {
- (void) remove (filename);
- return (TRUE);
- }
-
- FILE *fs = fopen (filename, "wb");
- uint8 data [8 + MAX_SFCCHEAT_NAME];
-
- if (!fs)
- return (FALSE);
-
- uint32 i;
- for (i = 0; i < Cheat.num_cheats; i++)
- {
- memset (data, 0, 8 + MAX_SFCCHEAT_NAME);
- data [6] = 254;
- data [7] = 252;
- if (!Cheat.c [i].enabled)
- data [0] |= 4;
-
- if (Cheat.c [i].saved)
- data [0] |= 8;
-
- data [1] = Cheat.c [i].byte;
- data [2] = (uint8) Cheat.c [i].address;
- data [3] = (uint8) (Cheat.c [i].address >> 8);
- data [4] = (uint8) (Cheat.c [i].address >> 16);
- data [5] = Cheat.c [i].saved_byte;
-
- memcpy (&data [8], Cheat.c [i].name, MAX_SFCCHEAT_NAME - 1);
- if (fwrite (data, 8 + MAX_SFCCHEAT_NAME, 1, fs) != 1)
- {
- fclose (fs);
- return (FALSE);
- }
- }
-
- fclose (fs);
- return (TRUE);
-}
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