snes9x/cheats2.cpp

787 lines
17 KiB
C++

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