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