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authoraliaspider2014-10-29 05:36:07 +0100
committeraliaspider2014-10-29 05:36:07 +0100
commita6dc7abc9b8cc3986eda5a84141da7dc9e4e8f1a (patch)
tree6f82417b0ab41f3887dd025ee3b85254e28143da /source/cheats2.c
parent1d98e1c317fa19687ae6bc3cb8e550ef7531bf02 (diff)
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start moving everything to C
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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);
+}