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project64/Source/Project64-core/N64System/CheatClass.cpp

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/****************************************************************************
* *
* Project64 - A Nintendo 64 emulator. *
* http://www.pj64-emu.com/ *
* Copyright (C) 2012 Project64. All rights reserved. *
* *
* License: *
* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
* *
****************************************************************************/
#include "stdafx.h"
#include "CheatClass.h"
#include <Project64-core/Settings/SettingType/SettingsType-Cheats.h>
#include <Project64-core/Plugins/GFXPlugin.h>
#include <Project64-core/Plugins/AudioPlugin.h>
#include <Project64-core/Plugins/RSPPlugin.h>
#include <Project64-core/Plugins/ControllerPlugin.h>
CCheats::CCheats()
{
}
CCheats::~CCheats()
{
}
bool CCheats::LoadCode(int CheatNo, const char * CheatString)
{
if (!IsValid16BitCode(CheatString))
{
return false;
}
const char * ReadPos = CheatString;
CODES Code;
while (ReadPos)
{
GAMESHARK_CODE CodeEntry;
CodeEntry.Command = std::strtoul(ReadPos, 0, 16);
ReadPos = strchr(ReadPos, ' ');
if (ReadPos == NULL) { break; }
ReadPos += 1;
if (strncmp(ReadPos, "????", 4) == 0)
{
if (CheatNo < 0 || CheatNo > MaxCheats) { return false; }
stdstr CheatExt = g_Settings->LoadStringIndex(Cheat_Extension, CheatNo);
if (CheatExt.empty()) { return false; }
CodeEntry.Value = CheatExt[0] == '$' ? (uint16_t)std::strtoul(&CheatExt.c_str()[1], 0, 16) : (uint16_t)atol(CheatExt.c_str());
}
else if (strncmp(ReadPos, "??", 2) == 0)
{
if (CheatNo < 0 || CheatNo > MaxCheats) { return false; }
stdstr CheatExt = g_Settings->LoadStringIndex(Cheat_Extension, CheatNo);
if (CheatExt.empty()) { return false; }
CodeEntry.Value = (uint8_t)(std::strtoul(ReadPos, 0, 16));
CodeEntry.Value |= (CheatExt[0] == '$' ? (uint8_t)std::strtoul(&CheatExt.c_str()[1], 0, 16) : (uint8_t)atol(CheatExt.c_str())) << 16;
}
else if (strncmp(&ReadPos[2], "??", 2) == 0)
{
if (CheatNo < 0 || CheatNo > MaxCheats) { return false; }
stdstr CheatExt = g_Settings->LoadStringIndex(Cheat_Extension, CheatNo);
if (CheatExt.empty()) { return false; }
CodeEntry.Value = (uint16_t)(std::strtoul(ReadPos, 0, 16) << 16);
CodeEntry.Value |= CheatExt[0] == '$' ? (uint8_t)std::strtoul(&CheatExt.c_str()[1], 0, 16) : (uint8_t)atol(CheatExt.c_str());
}
else
{
CodeEntry.Value = (uint16_t)std::strtoul(ReadPos, 0, 16);
}
Code.push_back(CodeEntry);
ReadPos = strchr(ReadPos, ',');
if (ReadPos == NULL)
{
continue;
}
ReadPos++;
}
if (Code.size() == 0)
{
return false;
}
m_Codes.push_back(Code);
return true;
}
void CCheats::LoadPermCheats(CPlugins * Plugins)
{
if (g_Settings->LoadBool(Debugger_DisableGameFixes))
{
return;
}
for (int CheatNo = 0; CheatNo < MaxCheats; CheatNo++)
{
stdstr LineEntry;
if (!g_Settings->LoadStringIndex(Rdb_GameCheatFix, CheatNo, LineEntry) || LineEntry.empty())
{
break;
}
stdstr CheatPlugins;
bool LoadEntry = true;
if (g_Settings->LoadStringIndex(Rdb_GameCheatFixPlugin, CheatNo, CheatPlugins) && !CheatPlugins.empty())
{
LoadEntry = false;
strvector PluginList = CheatPlugins.Tokenize(',');
for (size_t i = 0, n = PluginList.size(); i < n; i++)
{
stdstr PluginName = PluginList[i].Trim();
if (strstr(Plugins->Gfx()->PluginName(), PluginName.c_str()) != NULL)
{
LoadEntry = true;
break;
}
if (strstr(Plugins->Audio()->PluginName(), PluginName.c_str()) != NULL)
{
LoadEntry = true;
break;
}
if (strstr(Plugins->RSP()->PluginName(), PluginName.c_str()) != NULL)
{
LoadEntry = true;
break;
}
if (strstr(Plugins->Control()->PluginName(), PluginName.c_str()) != NULL)
{
LoadEntry = true;
break;
}
}
}
if (LoadEntry)
{
LoadCode(-1, LineEntry.c_str());
}
}
}
void CCheats::LoadCheats(bool DisableSelected, CPlugins * Plugins)
{
m_Codes.clear();
LoadPermCheats(Plugins);
for (int CheatNo = 0; CheatNo < MaxCheats; CheatNo++)
{
stdstr LineEntry = g_Settings->LoadStringIndex(Cheat_Entry, CheatNo);
if (LineEntry.empty()) { break; }
if (!g_Settings->LoadBoolIndex(Cheat_Active, CheatNo))
{
continue;
}
if (DisableSelected)
{
g_Settings->SaveBoolIndex(Cheat_Active, CheatNo, false);
continue;
}
//Find the start and end of the name which is surrounded in ""
int StartOfName = LineEntry.find("\"");
if (StartOfName == -1) { continue; }
int EndOfName = LineEntry.find("\"", StartOfName + 1);
if (EndOfName == -1) { continue; }
LoadCode(CheatNo, &LineEntry.c_str()[EndOfName + 2]);
}
}
/********************************************************************************************
ConvertXP64Address
Purpose: Decode encoded XP64 address to physical address
Parameters:
Returns:
Author: Witten
********************************************************************************************/
uint32_t ConvertXP64Address(uint32_t Address)
{
uint32_t tmpAddress;
tmpAddress = (Address ^ 0x68000000) & 0xFF000000;
tmpAddress += ((Address + 0x002B0000) ^ 0x00810000) & 0x00FF0000;
tmpAddress += ((Address + 0x00002B00) ^ 0x00008200) & 0x0000FF00;
tmpAddress += ((Address + 0x0000002B) ^ 0x00000083) & 0x000000FF;
return tmpAddress;
}
/********************************************************************************************
ConvertXP64Value
Purpose: Decode encoded XP64 value
Parameters:
Returns:
Author: Witten
********************************************************************************************/
uint16_t ConvertXP64Value(uint16_t Value)
{
uint16_t tmpValue;
tmpValue = ((Value + 0x2B00) ^ 0x8400) & 0xFF00;
tmpValue += ((Value + 0x002B) ^ 0x0085) & 0x00FF;
return tmpValue;
}
void CCheats::ApplyCheats(CMipsMemory * MMU)
{
for (size_t CurrentCheat = 0; CurrentCheat < m_Codes.size(); CurrentCheat++)
{
const CODES & CodeEntry = m_Codes[CurrentCheat];
for (size_t CurrentEntry = 0; CurrentEntry < CodeEntry.size();)
{
CurrentEntry += ApplyCheatEntry(MMU, CodeEntry, CurrentEntry, true);
}
}
}
void CCheats::ApplyGSButton(CMipsMemory * MMU)
{
uint32_t Address;
for (size_t CurrentCheat = 0; CurrentCheat < m_Codes.size(); CurrentCheat++)
{
const CODES & CodeEntry = m_Codes[CurrentCheat];
for (size_t CurrentEntry = 0; CurrentEntry < CodeEntry.size(); CurrentEntry++)
{
const GAMESHARK_CODE & Code = CodeEntry[CurrentEntry];
switch (Code.Command & 0xFF000000) {
case 0x88000000:
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
MMU->SB_VAddr(Address, (uint8_t)Code.Value);
break;
case 0x89000000:
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
MMU->SH_VAddr(Address, Code.Value);
break;
// Xplorer64
case 0xA8000000:
Address = 0x80000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
MMU->SB_VAddr(Address, (uint8_t)ConvertXP64Value(Code.Value));
break;
case 0xA9000000:
Address = 0x80000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
MMU->SH_VAddr(Address, ConvertXP64Value(Code.Value));
break;
}
}
}
}
bool CCheats::IsValid16BitCode(const char * CheatString)
{
const char * ReadPos = CheatString;
bool GSButtonCheat = false, FirstEntry = true;
while (ReadPos)
{
GAMESHARK_CODE CodeEntry;
CodeEntry.Command = std::strtoul(ReadPos, 0, 16);
ReadPos = strchr(ReadPos, ' ');
if (ReadPos == NULL) { break; }
ReadPos += 1;
//validate Code Entry
switch (CodeEntry.Command & 0xFF000000) {
case 0x50000000:
case 0x80000000:
case 0xA0000000:
case 0xD0000000:
case 0xD2000000:
case 0xC8000000:
case 0xE8000000:
case 0x10000000: // Xplorer64
break;
case 0x81000000:
case 0xA1000000:
case 0xD1000000: // Added by Witten (witten@pj64cheats.net)
case 0xD3000000:
if (((CodeEntry.Command & 0xFFFFFF) & 1) == 1)
{
return false;
}
break;
case 0x88000000:
case 0xA8000000:
if (FirstEntry) { GSButtonCheat = true; }
if (!GSButtonCheat) { return false; }
break;
case 0x89000000:
if (FirstEntry) { GSButtonCheat = true; }
if (!GSButtonCheat) { return false; }
if (((CodeEntry.Command & 0xFFFFFF) & 1) == 1)
{
return false;
}
break;
case 0xA9000000:
if (FirstEntry) { GSButtonCheat = true; }
if (!GSButtonCheat) { return false; }
if (((ConvertXP64Address(CodeEntry.Command) & 0xFFFFFF) & 1) == 1)
{
return false;
}
break;
case 0x11000000: // Xplorer64
case 0xE9000000:
case 0xC9000000:
if (((ConvertXP64Address(CodeEntry.Command) & 0xFFFFFF) & 1) == 1)
{
return false;
}
break;
default:
return false;
}
FirstEntry = false;
ReadPos = strchr(ReadPos, ',');
if (ReadPos == NULL)
{
continue;
}
ReadPos++;
}
return true;
}
int CCheats::ApplyCheatEntry(CMipsMemory * MMU, const CODES & CodeEntry, int CurrentEntry, bool Execute)
{
if (CurrentEntry < 0 || CurrentEntry >= (int)CodeEntry.size())
{
return 0;
}
const GAMESHARK_CODE & Code = CodeEntry[CurrentEntry];
uint32_t Address;
uint16_t wMemory;
uint8_t bMemory;
switch (Code.Command & 0xFF000000)
{
// Gameshark / AR
case 0x50000000: // Added by Witten (witten@pj64cheats.net)
{
if ((CurrentEntry + 1) >= (int)CodeEntry.size())
{
return 1;
}
const GAMESHARK_CODE & NextCodeEntry = CodeEntry[CurrentEntry + 1];
int numrepeats = (Code.Command & 0x0000FF00) >> 8;
int offset = Code.Command & 0x000000FF;
int incr = Code.Value;
int i;
switch (NextCodeEntry.Command & 0xFF000000) {
case 0x10000000: // Xplorer64
case 0x80000000:
Address = 0x80000000 | (NextCodeEntry.Command & 0xFFFFFF);
wMemory = NextCodeEntry.Value;
for (i = 0; i < numrepeats; i++)
{
MMU->SB_VAddr(Address, (uint8_t)wMemory);
Address += offset;
wMemory += (uint16_t)incr;
}
return 2;
case 0x11000000: // Xplorer64
case 0x81000000:
Address = 0x80000000 | (NextCodeEntry.Command & 0xFFFFFF);
wMemory = NextCodeEntry.Value;
for (i = 0; i < numrepeats; i++)
{
MMU->SH_VAddr(Address, wMemory);
Address += offset;
wMemory += (uint16_t)incr;
}
return 2;
default: return 1;
}
}
break;
case 0x80000000:
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
if (Execute) { MMU->SB_VAddr(Address, (uint8_t)Code.Value); }
break;
case 0x81000000:
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
if (Execute) { MMU->SH_VAddr(Address, Code.Value); }
break;
case 0xA0000000:
Address = 0xA0000000 | (Code.Command & 0xFFFFFF);
if (Execute) { MMU->SB_VAddr(Address, (uint8_t)Code.Value); }
break;
case 0xA1000000:
Address = 0xA0000000 | (Code.Command & 0xFFFFFF);
if (Execute) { MMU->SH_VAddr(Address, Code.Value); }
break;
case 0xD0000000: // Added by Witten (witten@pj64cheats.net)
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
MMU->LB_VAddr(Address, bMemory);
if (bMemory != Code.Value) { Execute = false; }
return ApplyCheatEntry(MMU, CodeEntry, CurrentEntry + 1, Execute) + 1;
case 0xD1000000: // Added by Witten (witten@pj64cheats.net)
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
MMU->LH_VAddr(Address, wMemory);
if (wMemory != Code.Value) { Execute = false; }
return ApplyCheatEntry(MMU, CodeEntry, CurrentEntry + 1, Execute) + 1;
case 0xD2000000: // Added by Witten (witten@pj64cheats.net)
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
MMU->LB_VAddr(Address, bMemory);
if (bMemory == Code.Value) { Execute = false; }
return ApplyCheatEntry(MMU, CodeEntry, CurrentEntry + 1, Execute) + 1;
case 0xD3000000: // Added by Witten (witten@pj64cheats.net)
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
MMU->LH_VAddr(Address, wMemory);
if (wMemory == Code.Value) { Execute = false; }
return ApplyCheatEntry(MMU, CodeEntry, CurrentEntry + 1, Execute) + 1;
// Xplorer64 (Author: Witten)
case 0x30000000:
case 0x82000000:
case 0x84000000:
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
if (Execute) { MMU->SB_VAddr(Address, (uint8_t)Code.Value); }
break;
case 0x31000000:
case 0x83000000:
case 0x85000000:
Address = 0x80000000 | (Code.Command & 0xFFFFFF);
if (Execute) { MMU->SH_VAddr(Address, Code.Value); }
break;
case 0xE8000000:
Address = 0x80000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
if (Execute) { MMU->SB_VAddr(Address, (uint8_t)ConvertXP64Value(Code.Value)); }
break;
case 0xE9000000:
Address = 0x80000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
if (Execute) { MMU->SH_VAddr(Address, ConvertXP64Value(Code.Value)); }
break;
case 0xC8000000:
Address = 0xA0000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
if (Execute) { MMU->SB_VAddr(Address, (uint8_t)Code.Value); }
break;
case 0xC9000000:
Address = 0xA0000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
if (Execute) { MMU->SH_VAddr(Address, ConvertXP64Value(Code.Value)); }
break;
case 0xB8000000:
Address = 0x80000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
MMU->LB_VAddr(Address, bMemory);
if (bMemory != ConvertXP64Value(Code.Value)) { Execute = false; }
return ApplyCheatEntry(MMU, CodeEntry, CurrentEntry + 1, Execute) + 1;
case 0xB9000000:
Address = 0x80000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
MMU->LH_VAddr(Address, wMemory);
if (wMemory != ConvertXP64Value(Code.Value)) { Execute = false; }
return ApplyCheatEntry(MMU, CodeEntry, CurrentEntry + 1, Execute) + 1;
case 0xBA000000:
Address = 0x80000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
MMU->LB_VAddr(Address, bMemory);
if (bMemory == ConvertXP64Value(Code.Value)) { Execute = false; }
return ApplyCheatEntry(MMU, CodeEntry, CurrentEntry + 1, Execute) + 1;
case 0xBB000000:
Address = 0x80000000 | (ConvertXP64Address(Code.Command) & 0xFFFFFF);
MMU->LH_VAddr(Address, wMemory);
if (wMemory == ConvertXP64Value(Code.Value)) { Execute = false; }
return ApplyCheatEntry(MMU, CodeEntry, CurrentEntry + 1, Execute) + 1;
case 0: return MaxGSEntries; break;
}
return 1;
}
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