From a6dc7abc9b8cc3986eda5a84141da7dc9e4e8f1a Mon Sep 17 00:00:00 2001 From: aliaspider Date: Wed, 29 Oct 2014 05:36:07 +0100 Subject: start moving everything to C --- source/cheats2.c | 285 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 285 insertions(+) create mode 100644 source/cheats2.c (limited to 'source/cheats2.c') diff --git a/source/cheats2.c b/source/cheats2.c new file mode 100644 index 0000000..59855b9 --- /dev/null +++ b/source/cheats2.c @@ -0,0 +1,285 @@ +/******************************************************************************* + 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 +#include +#include +#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); +} -- cgit v1.2.3