mirror of https://github.com/snes9xgit/snes9x.git
787 lines
17 KiB
C++
787 lines
17 KiB
C++
/*****************************************************************************\
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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This file is licensed under the Snes9x License.
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For further information, consult the LICENSE file in the root directory.
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\*****************************************************************************/
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#include "bml.h"
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#include "cheats.h"
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#include "snes9x.h"
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#include "memmap.h"
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static inline uint8 S9xGetByteFree(uint32 Address)
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{
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int block = (Address & 0xffffff) >> MEMMAP_SHIFT;
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uint8 *GetAddress = Memory.Map[block];
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uint8 byte;
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if (GetAddress >= (uint8 *)CMemory::MAP_LAST)
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{
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byte = *(GetAddress + (Address & 0xffff));
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return (byte);
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}
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switch ((pint)GetAddress)
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{
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case CMemory::MAP_CPU:
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byte = S9xGetCPU(Address & 0xffff);
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return (byte);
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case CMemory::MAP_PPU:
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if (CPU.InDMAorHDMA && (Address & 0xff00) == 0x2100)
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return (OpenBus);
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byte = S9xGetPPU(Address & 0xffff);
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return (byte);
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case CMemory::MAP_LOROM_SRAM:
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case CMemory::MAP_SA1RAM:
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// Address & 0x7fff : offset into bank
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// Address & 0xff0000 : bank
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// bank >> 1 | offset : SRAM address, unbound
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// unbound & SRAMMask : SRAM offset
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byte = *(Memory.SRAM + ((((Address & 0xff0000) >> 1) | (Address & 0x7fff)) & Memory.SRAMMask));
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return (byte);
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case CMemory::MAP_LOROM_SRAM_B:
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byte = *(Multi.sramB + ((((Address & 0xff0000) >> 1) | (Address & 0x7fff)) & Multi.sramMaskB));
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return (byte);
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case CMemory::MAP_HIROM_SRAM:
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case CMemory::MAP_RONLY_SRAM:
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byte = *(Memory.SRAM + (((Address & 0x7fff) - 0x6000 + ((Address & 0x1f0000) >> 3)) & Memory.SRAMMask));
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return (byte);
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case CMemory::MAP_BWRAM:
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byte = *(Memory.BWRAM + ((Address & 0x7fff) - 0x6000));
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return (byte);
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case CMemory::MAP_DSP:
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byte = S9xGetDSP(Address & 0xffff);
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return (byte);
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case CMemory::MAP_SPC7110_ROM:
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byte = S9xGetSPC7110Byte(Address);
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return (byte);
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case CMemory::MAP_SPC7110_DRAM:
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byte = S9xGetSPC7110(0x4800);
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return (byte);
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case CMemory::MAP_C4:
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byte = S9xGetC4(Address & 0xffff);
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return (byte);
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case CMemory::MAP_OBC_RAM:
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byte = S9xGetOBC1(Address & 0xffff);
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return (byte);
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case CMemory::MAP_SETA_DSP:
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byte = S9xGetSetaDSP(Address);
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return (byte);
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case CMemory::MAP_SETA_RISC:
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byte = S9xGetST018(Address);
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return (byte);
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case CMemory::MAP_BSX:
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byte = S9xGetBSX(Address);
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return (byte);
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case CMemory::MAP_NONE:
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default:
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byte = OpenBus;
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return (byte);
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}
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}
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static inline void S9xSetByteFree(uint8 Byte, uint32 Address)
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{
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int block = (Address & 0xffffff) >> MEMMAP_SHIFT;
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uint8 *SetAddress = Memory.Map[block];
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if (SetAddress >= (uint8 *)CMemory::MAP_LAST)
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{
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*(SetAddress + (Address & 0xffff)) = Byte;
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return;
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}
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switch ((pint)SetAddress)
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{
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case CMemory::MAP_CPU:
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S9xSetCPU(Byte, Address & 0xffff);
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return;
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case CMemory::MAP_PPU:
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if (CPU.InDMAorHDMA && (Address & 0xff00) == 0x2100)
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return;
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S9xSetPPU(Byte, Address & 0xffff);
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return;
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case CMemory::MAP_LOROM_SRAM:
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if (Memory.SRAMMask)
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{
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*(Memory.SRAM + ((((Address & 0xff0000) >> 1) | (Address & 0x7fff)) & Memory.SRAMMask)) = Byte;
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CPU.SRAMModified = TRUE;
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}
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return;
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case CMemory::MAP_LOROM_SRAM_B:
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if (Multi.sramMaskB)
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{
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*(Multi.sramB + ((((Address & 0xff0000) >> 1) | (Address & 0x7fff)) & Multi.sramMaskB)) = Byte;
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CPU.SRAMModified = TRUE;
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}
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return;
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case CMemory::MAP_HIROM_SRAM:
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if (Memory.SRAMMask)
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{
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*(Memory.SRAM + (((Address & 0x7fff) - 0x6000 + ((Address & 0x1f0000) >> 3)) & Memory.SRAMMask)) = Byte;
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CPU.SRAMModified = TRUE;
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}
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return;
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case CMemory::MAP_BWRAM:
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*(Memory.BWRAM + ((Address & 0x7fff) - 0x6000)) = Byte;
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CPU.SRAMModified = TRUE;
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return;
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case CMemory::MAP_SA1RAM:
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*(Memory.SRAM + (Address & 0xffff)) = Byte;
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return;
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case CMemory::MAP_DSP:
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S9xSetDSP(Byte, Address & 0xffff);
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return;
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case CMemory::MAP_C4:
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S9xSetC4(Byte, Address & 0xffff);
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return;
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case CMemory::MAP_OBC_RAM:
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S9xSetOBC1(Byte, Address & 0xffff);
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return;
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case CMemory::MAP_SETA_DSP:
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S9xSetSetaDSP(Byte, Address);
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return;
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case CMemory::MAP_SETA_RISC:
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S9xSetST018(Byte, Address);
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return;
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case CMemory::MAP_BSX:
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S9xSetBSX(Byte, Address);
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return;
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case CMemory::MAP_NONE:
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default:
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return;
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}
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}
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void S9xInitWatchedAddress(void)
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{
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for (unsigned int i = 0; i < sizeof(watches) / sizeof(watches[0]); i++)
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watches[i].on = false;
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}
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void S9xInitCheatData(void)
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{
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Cheat.RAM = Memory.RAM;
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Cheat.SRAM = Memory.SRAM;
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Cheat.FillRAM = Memory.FillRAM;
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}
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static inline std::string trim(const std::string &&string)
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{
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auto start = string.find_first_not_of(" \t\n\r");
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auto end = string.find_last_not_of(" \t\n\r");
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if (start != std::string::npos && end != std::string::npos)
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return string.substr(start, end - start + 1);
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return "";
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}
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void S9xUpdateCheatInMemory(SCheat &c)
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{
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uint8 byte;
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if (!c.enabled)
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return;
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byte = S9xGetByteFree(c.address);
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if (byte != c.byte)
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{
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/* The game wrote a different byte to the address, update saved_byte */
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c.saved_byte = byte;
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if (c.conditional)
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{
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if (c.saved_byte != c.cond_byte && c.cond_true)
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{
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/* Condition is now false, let the byte stand */
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c.cond_true = false;
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}
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else if (c.saved_byte == c.cond_byte && !c.cond_true)
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{
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c.cond_true = true;
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S9xSetByteFree(c.byte, c.address);
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}
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}
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else
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S9xSetByteFree(c.byte, c.address);
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}
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else if (c.conditional)
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{
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if (byte == c.cond_byte)
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{
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c.cond_true = true;
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c.saved_byte = byte;
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S9xSetByteFree(c.byte, c.address);
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}
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}
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}
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void S9xDisableCheat(SCheat &c)
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{
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if (!c.enabled)
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return;
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if (!Cheat.enabled)
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{
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c.enabled = false;
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return;
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}
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/* Make sure we restore the up-to-date written byte */
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S9xUpdateCheatInMemory(c);
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c.enabled = false;
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if (c.conditional && !c.cond_true)
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return;
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S9xSetByteFree (c.saved_byte, c.address);
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c.cond_true = false;
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}
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void S9xDeleteCheatGroup(uint32 g)
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{
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unsigned int i;
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if (g >= Cheat.group.size())
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return;
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for (i = 0; i < Cheat.group[g].cheat.size(); i++)
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{
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S9xDisableCheat(Cheat.group[g].cheat[i]);
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}
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Cheat.group.erase(Cheat.group.begin() + g);
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}
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void S9xDeleteCheats(void)
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{
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for (size_t i = 0; i < Cheat.group.size(); i++)
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{
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S9xDisableCheatGroup(i);
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}
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Cheat.group.clear();
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}
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void S9xEnableCheat(SCheat &c)
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{
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uint8 byte;
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if (c.enabled)
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return;
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c.enabled = true;
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if (!Cheat.enabled)
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return;
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byte = S9xGetByteFree(c.address);
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if (c.conditional)
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{
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if (byte != c.cond_byte)
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return;
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c.cond_true = true;
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}
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c.saved_byte = byte;
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S9xSetByteFree(c.byte, c.address);
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}
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void S9xEnableCheatGroup(uint32 num)
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{
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for (auto &c : Cheat.group[num].cheat)
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S9xEnableCheat(c);
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Cheat.group[num].enabled = true;
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}
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void S9xDisableCheatGroup(uint32 num)
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{
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for (auto &c : Cheat.group[num].cheat)
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S9xDisableCheat(c);
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Cheat.group[num].enabled = false;
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}
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static bool is_all_hex(const std::string &code)
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{
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for (const auto &c : code)
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{
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if ((c < '0' || c > '9') &&
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(c < 'a' || c > 'f') &&
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(c < 'A' || c > 'F'))
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return false;
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}
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return true;
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}
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bool S9xProActionReplayToRaw(const std::string &code, uint32 &address, uint8 &byte)
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{
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if (code.length() != 8 || !is_all_hex(code))
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return false;
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uint32 data = std::strtoul(code.c_str(), nullptr, 16);
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address = data >> 8;
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byte = (uint8)data;
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return true;
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}
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bool S9xGameGenieToRaw(const std::string &code, uint32 &address, uint8 &byte)
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{
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if (code.length() != 9)
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return false;
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if (code[4] != '-')
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return false;
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if (!is_all_hex(code.substr(0, 4)))
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return false;
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if (!is_all_hex(code.substr(5, 4)))
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return false;
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auto new_code = code.substr(0, 4) + code.substr(5, 4);
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static const char *real_hex = "0123456789ABCDEF";
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static const char *genie_hex = "DF4709156BC8A23E";
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for (auto &c : new_code)
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{
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c = toupper(c);
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for (int i = 0; i < 16; i++)
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{
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if (genie_hex[i] == c)
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{
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c = real_hex[i];
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break;
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}
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}
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}
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uint32 data = strtoul(new_code.c_str(), nullptr, 16);
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byte = (uint8)(data >> 24);
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address = data & 0xffffff;
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address = ((address & 0x003c00) << 10) +
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((address & 0x00003c) << 14) +
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((address & 0xf00000) >> 8) +
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((address & 0x000003) << 10) +
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((address & 0x00c000) >> 6) +
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((address & 0x0f0000) >> 12) +
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((address & 0x0003c0) >> 6);
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return true;
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}
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SCheat S9xTextToCheat(const std::string &text)
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{
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SCheat c;
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unsigned int byte = 0;
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unsigned int cond_byte = 0;
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c.enabled = false;
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c.conditional = false;
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if (S9xGameGenieToRaw(text, c.address, c.byte))
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{
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byte = c.byte;
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}
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else if (S9xProActionReplayToRaw(text, c.address, c.byte))
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{
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byte = c.byte;
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}
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else if (sscanf(text.c_str(), "%x = %x ? %x", &c.address, &cond_byte, &byte) == 3)
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{
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c.conditional = true;
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}
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else if (sscanf(text.c_str(), "%x = %x", &c.address, &byte) == 2)
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{
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}
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else if (sscanf(text.c_str(), "%x / %x / %x", &c.address, &cond_byte, &byte) == 3)
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{
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c.conditional = true;
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}
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else if (sscanf(text.c_str(), "%x : %x", &c.address, &byte) == 2)
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{
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}
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else if (sscanf(text.c_str(), "%x / %x", &c.address, &byte) == 2)
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{
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}
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else
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{
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c.address = 0;
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byte = 0;
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}
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c.byte = byte;
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c.cond_byte = cond_byte;
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return c;
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}
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std::vector<std::string> split_string(const std::string &str, unsigned char delim)
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{
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std::vector<std::string> tokens;
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size_t pos = 0;
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size_t index;
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while (pos < str.length())
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{
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index = str.find(delim, pos);
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if (index == std::string::npos)
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{
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if (pos < str.length())
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{
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tokens.push_back(trim(str.substr(pos)));
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}
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break;
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}
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else if (index > pos)
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{
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tokens.push_back(trim(str.substr(pos, index - pos)));
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}
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pos = index + 1;
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}
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return tokens;
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}
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SCheatGroup S9xCreateCheatGroup(const std::string &name, const std::string &cheat)
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{
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SCheatGroup g;
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g.name = name;
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g.enabled = false;
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auto cheats = split_string(cheat, '+');
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for (const auto &c : cheats)
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{
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SCheat new_cheat = S9xTextToCheat(c);
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if (new_cheat.address)
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g.cheat.push_back(new_cheat);
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}
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return g;
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}
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int S9xAddCheatGroup(const std::string &name, const std::string &cheat)
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{
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SCheatGroup g = S9xCreateCheatGroup(name, cheat);
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if (g.cheat.size() == 0)
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return -1;
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Cheat.group.push_back(g);
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return Cheat.group.size() - 1;
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}
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int S9xModifyCheatGroup(uint32 num, const std::string &name, const std::string &cheat)
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{
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if (num >= Cheat.group.size())
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return -1;
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S9xDisableCheatGroup(num);
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Cheat.group[num] = S9xCreateCheatGroup(name, cheat);
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return num;
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}
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std::string S9xCheatToText(const SCheat &c)
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{
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char output[256]{};
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if (c.conditional)
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sprintf(output, "%06x=%02x?%02x", c.address, c.cond_byte, c.byte);
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else
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sprintf(output, "%06x=%02x", c.address, c.byte);
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return std::string(output);
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}
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std::string S9xCheatGroupToText(const SCheatGroup &g)
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{
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std::string text = "";
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for (size_t i = 0; i < g.cheat.size(); i++)
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{
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text += S9xCheatToText(g.cheat[i]);
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if (i != g.cheat.size() - 1)
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text += "+";
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}
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return text;
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}
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std::string S9xCheatValidate(const std::string &code_string)
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{
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SCheatGroup g = S9xCreateCheatGroup("temp", code_string);
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if (g.cheat.size() > 0)
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{
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return S9xCheatGroupToText(g);
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}
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return "";
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}
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std::string S9xCheatGroupToText(uint32 num)
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{
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if (num >= Cheat.group.size())
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return "";
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return S9xCheatGroupToText(Cheat.group[num]);
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}
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void S9xUpdateCheatsInMemory(void)
|
|
{
|
|
if (!Cheat.enabled)
|
|
return;
|
|
|
|
for (auto &group : Cheat.group)
|
|
for (auto &cheat : group.cheat)
|
|
S9xUpdateCheatInMemory(cheat);
|
|
}
|
|
|
|
static bool S9xCheatIsDuplicate(const std::string &name, const std::string &code)
|
|
{
|
|
for (size_t i = 0; i < Cheat.group.size(); i++)
|
|
{
|
|
if (Cheat.group[i].name == name)
|
|
{
|
|
auto code_string = S9xCheatGroupToText(i);
|
|
auto validated_string = S9xCheatValidate(code);
|
|
|
|
if (validated_string == code_string)
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void S9xLoadCheatsFromBMLNode(bml_node &n)
|
|
{
|
|
for (auto &c : n.child)
|
|
{
|
|
if (strcasecmp(c.name.c_str(), "cheat"))
|
|
continue;
|
|
|
|
auto subnode = c.find_subnode("code");
|
|
if (!subnode)
|
|
continue;
|
|
std::string code = subnode->data;
|
|
|
|
std::string name;
|
|
subnode = c.find_subnode("name");
|
|
if (subnode)
|
|
name = subnode->data;
|
|
|
|
bool enable = false;
|
|
if (c.find_subnode("enable"))
|
|
enable = true;
|
|
|
|
if (S9xCheatIsDuplicate(name, code))
|
|
continue;
|
|
|
|
auto index = S9xAddCheatGroup(name, code);
|
|
if (enable)
|
|
S9xEnableCheatGroup(index);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static bool8 S9xLoadCheatFileClassic(const std::string &filename)
|
|
{
|
|
FILE *fs;
|
|
uint8 data[28];
|
|
|
|
fs = fopen(filename.c_str(), "rb");
|
|
if (!fs)
|
|
return (FALSE);
|
|
|
|
while (fread(data, 1, 28, fs) == 28)
|
|
{
|
|
SCheat c;
|
|
c.enabled = (data[0] & 4) == 0;
|
|
c.byte = data[1];
|
|
c.address = data[2] | (data[3] << 8) | (data[4] << 16);
|
|
|
|
std::string name((const char *)&data[8], 20);
|
|
char code[32]{};
|
|
sprintf(code, "%x=%x", c.address, c.byte);
|
|
std::string cheat(code);
|
|
S9xAddCheatGroup(name, cheat);
|
|
|
|
if (c.enabled)
|
|
S9xEnableCheatGroup(Cheat.group.size() - 1);
|
|
}
|
|
|
|
fclose(fs);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
bool8 S9xLoadCheatFile(const std::string &filename)
|
|
{
|
|
bml_node bml;
|
|
if (!bml.parse_file(filename))
|
|
{
|
|
return S9xLoadCheatFileClassic(filename);
|
|
}
|
|
|
|
bml_node *n = bml.find_subnode("cheat");
|
|
if (n)
|
|
{
|
|
S9xLoadCheatsFromBMLNode(bml);
|
|
}
|
|
|
|
if (!n)
|
|
{
|
|
return S9xLoadCheatFileClassic(filename);
|
|
}
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
bool8 S9xSaveCheatFile(const std::string &filename)
|
|
{
|
|
unsigned int i;
|
|
FILE *file = NULL;
|
|
|
|
if (Cheat.group.size() == 0)
|
|
{
|
|
remove(filename.c_str());
|
|
return TRUE;
|
|
}
|
|
|
|
file = fopen(filename.c_str(), "w");
|
|
|
|
if (!file)
|
|
return FALSE;
|
|
|
|
for (i = 0; i < Cheat.group.size(); i++)
|
|
{
|
|
fprintf(file,
|
|
"cheat\n"
|
|
" name: %s\n"
|
|
" code: %s\n"
|
|
"%s\n",
|
|
Cheat.group[i].name.c_str(),
|
|
S9xCheatGroupToText(i).c_str(),
|
|
Cheat.group[i].enabled ? " enable\n" : "");
|
|
}
|
|
|
|
fclose(file);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
void S9xCheatsDisable(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (!Cheat.enabled)
|
|
return;
|
|
|
|
for (i = 0; i < Cheat.group.size(); i++)
|
|
{
|
|
if (Cheat.group[i].enabled)
|
|
{
|
|
S9xDisableCheatGroup(i);
|
|
Cheat.group[i].enabled = TRUE;
|
|
}
|
|
}
|
|
|
|
Cheat.enabled = FALSE;
|
|
}
|
|
|
|
void S9xCheatsEnable(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (Cheat.enabled)
|
|
return;
|
|
|
|
Cheat.enabled = TRUE;
|
|
|
|
for (i = 0; i < Cheat.group.size(); i++)
|
|
{
|
|
if (Cheat.group[i].enabled)
|
|
{
|
|
Cheat.group[i].enabled = FALSE;
|
|
S9xEnableCheatGroup(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
int S9xImportCheatsFromDatabase(const std::string &filename)
|
|
{
|
|
char sha256_txt[65];
|
|
char hextable[] = "0123456789abcdef";
|
|
unsigned int i;
|
|
|
|
bml_node bml;
|
|
if (!bml.parse_file(filename))
|
|
return -1; // No file
|
|
|
|
for (i = 0; i < 32; i++)
|
|
{
|
|
sha256_txt[i * 2] = hextable[Memory.ROMSHA256[i] >> 4];
|
|
sha256_txt[i * 2 + 1] = hextable[Memory.ROMSHA256[i] & 0xf];
|
|
}
|
|
sha256_txt[64] = '\0';
|
|
|
|
for (auto &c : bml.child)
|
|
{
|
|
if (!strcasecmp(c.name.c_str(), "cartridge"))
|
|
{
|
|
auto n = c.find_subnode("sha256");
|
|
|
|
if (n && !strcasecmp(n->data.c_str(), sha256_txt))
|
|
{
|
|
S9xLoadCheatsFromBMLNode(c);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return -2; /* No codes */
|
|
}
|