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6691c6903bfd25a983457e241f0099e421012715
melonDS/src/frontend/Util_ROM.cpp
Arisotura 6691c6903b asfdasdas you'd better not give me shit now
2021-04-26 16:43:25 +02:00

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/*
Copyright 2016-2021 Arisotura
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with melonDS. If not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include <string.h>
#ifdef ARCHIVE_SUPPORT_ENABLED
#include "ArchiveUtil.h"
#endif
#include "FrontendUtil.h"
#include "Config.h"
#include "SharedConfig.h"
#include "Platform.h"
#include "NDS.h"
#include "DSi.h"
#include "GBACart.h"
#include "AREngine.h"
namespace Frontend
{
char ROMPath [ROMSlot_MAX][1024];
char SRAMPath [ROMSlot_MAX][1024];
char PrevSRAMPath[ROMSlot_MAX][1024]; // for savestate 'undo load'
char NDSROMExtension[4];
bool SavestateLoaded;
ARCodeFile* CheatFile;
bool CheatsOn;
void Init_ROM()
{
SavestateLoaded = false;
memset(ROMPath[ROMSlot_NDS], 0, 1024);
memset(ROMPath[ROMSlot_GBA], 0, 1024);
memset(SRAMPath[ROMSlot_NDS], 0, 1024);
memset(SRAMPath[ROMSlot_GBA], 0, 1024);
memset(PrevSRAMPath[ROMSlot_NDS], 0, 1024);
memset(PrevSRAMPath[ROMSlot_GBA], 0, 1024);
CheatFile = nullptr;
CheatsOn = false;
}
void DeInit_ROM()
{
if (CheatFile)
{
delete CheatFile;
CheatFile = nullptr;
}
}
// TODO: currently, when failing to load a ROM for whatever reason, we attempt
// to revert to the previous state and resume execution; this may not be a very
// good thing, depending on what state the core was left in.
// should we do a better state revert (via the savestate system)? completely stop?
void SetupSRAMPath(int slot)
{
strncpy(SRAMPath[slot], ROMPath[slot], 1023);
SRAMPath[slot][1023] = '\0';
strncpy(SRAMPath[slot] + strlen(ROMPath[slot]) - 3, "sav", 3);
}
int VerifyDSBIOS()
{
FILE* f;
long len;
f = Platform::OpenLocalFile(Config::BIOS9Path, "rb");
if (!f) return Load_BIOS9Missing;
fseek(f, 0, SEEK_END);
len = ftell(f);
if (len != 0x1000)
{
fclose(f);
return Load_BIOS9Bad;
}
fclose(f);
f = Platform::OpenLocalFile(Config::BIOS7Path, "rb");
if (!f) return Load_BIOS7Missing;
fseek(f, 0, SEEK_END);
len = ftell(f);
if (len != 0x4000)
{
fclose(f);
return Load_BIOS7Bad;
}
fclose(f);
return Load_OK;
}
int VerifyDSiBIOS()
{
FILE* f;
long len;
// TODO: check the first 32 bytes
f = Platform::OpenLocalFile(Config::DSiBIOS9Path, "rb");
if (!f) return Load_DSiBIOS9Missing;
fseek(f, 0, SEEK_END);
len = ftell(f);
if (len != 0x10000)
{
fclose(f);
return Load_DSiBIOS9Bad;
}
fclose(f);
f = Platform::OpenLocalFile(Config::DSiBIOS7Path, "rb");
if (!f) return Load_DSiBIOS7Missing;
fseek(f, 0, SEEK_END);
len = ftell(f);
if (len != 0x10000)
{
fclose(f);
return Load_DSiBIOS7Bad;
}
fclose(f);
return Load_OK;
}
int VerifyDSFirmware()
{
FILE* f;
long len;
f = Platform::OpenLocalFile(Config::FirmwarePath, "rb");
if (!f) return Load_FirmwareMissing;
fseek(f, 0, SEEK_END);
len = ftell(f);
if (len == 0x20000)
{
// 128KB firmware, not bootable
fclose(f);
return Load_FirmwareNotBootable;
}
else if (len != 0x40000 && len != 0x80000)
{
fclose(f);
return Load_FirmwareBad;
}
fclose(f);
return Load_OK;
}
int VerifyDSiFirmware()
{
FILE* f;
long len;
f = Platform::OpenLocalFile(Config::DSiFirmwarePath, "rb");
if (!f) return Load_FirmwareMissing;
fseek(f, 0, SEEK_END);
len = ftell(f);
if (len != 0x20000)
{
// not 128KB
// TODO: check whether those work
fclose(f);
return Load_FirmwareBad;
}
fclose(f);
return Load_OK;
}
int SetupDSiNAND()
{
FILE* f;
long len;
f = Platform::OpenLocalFile(Config::DSiNANDPath, "r+b");
if (!f) return Load_DSiNANDMissing;
// TODO: some basic checks
// check that it has the nocash footer, and all
DSi::SDMMCFile = f;
if (Config::DSiSDEnable)
{
f = Platform::OpenLocalFile(Config::DSiSDPath, "r+b");
if (f)
DSi::SDIOFile = f;
else
DSi::SDIOFile = Platform::OpenLocalFile(Config::DSiSDPath, "w+b");
}
return Load_OK;
}
void LoadCheats()
{
if (CheatFile)
{
delete CheatFile;
CheatFile = nullptr;
}
char filename[1024];
if (ROMPath[ROMSlot_NDS][0] != '\0')
{
strncpy(filename, ROMPath[ROMSlot_NDS], 1023);
filename[1023] = '\0';
strncpy(filename + strlen(ROMPath[ROMSlot_NDS]) - 3, "mch", 3);
}
else
{
strncpy(filename, "firmware.mch", 1023);
}
// TODO: check for error (malformed cheat file, ...)
CheatFile = new ARCodeFile(filename);
AREngine::SetCodeFile(CheatsOn ? CheatFile : nullptr);
}
int LoadBIOS()
{
DSi::CloseDSiNAND();
int res;
res = VerifyDSBIOS();
if (res != Load_OK) return res;
if (Config::ConsoleType == 1)
{
res = VerifyDSiBIOS();
if (res != Load_OK) return res;
res = VerifyDSiFirmware();
if (res != Load_OK) return res;
res = SetupDSiNAND();
if (res != Load_OK) return res;
}
else
{
res = VerifyDSFirmware();
if (res != Load_OK) return res;
}
// TODO:
// original code in the libui frontend called NDS::LoadGBAROM() if needed
// should this be carried over here?
// is that behavior consistent with that of LoadROM() below?
ROMPath[ROMSlot_NDS][0] = '\0';
SRAMPath[ROMSlot_NDS][0] = '\0';
NDS::SetConsoleType(Config::ConsoleType);
NDS::LoadBIOS();
SavestateLoaded = false;
LoadCheats();
return Load_OK;
}
int LoadROM(const u8 *romdata, u32 romlength, const char *archivefilename, const char *romfilename, const char *sramfilename, int slot)
{
int res;
bool directboot = Config::DirectBoot != 0;
if (Config::ConsoleType == 1 && slot == 1)
{
// cannot load a GBA ROM into a DSi
return Load_ROMLoadError;
}
res = VerifyDSBIOS();
if (res != Load_OK) return res;
if (Config::ConsoleType == 1)
{
res = VerifyDSiBIOS();
if (res != Load_OK) return res;
res = VerifyDSiFirmware();
if (res != Load_OK) return res;
res = SetupDSiNAND();
if (res != Load_OK) return res;
GBACart::Eject();
ROMPath[ROMSlot_GBA][0] = '\0';
}
else
{
res = VerifyDSFirmware();
if (res != Load_OK)
{
if (res == Load_FirmwareNotBootable)
directboot = true;
else
return res;
}
}
char oldpath[1024];
char oldsram[1024];
strncpy(oldpath, ROMPath[slot], 1024);
strncpy(oldsram, SRAMPath[slot], 1024);
strncpy(SRAMPath[slot], sramfilename, 1024);
strncpy(ROMPath[slot], archivefilename, 1024);
NDS::SetConsoleType(Config::ConsoleType);
if (slot == ROMSlot_NDS && NDS::LoadROM(romdata, romlength, SRAMPath[slot], directboot))
{
SavestateLoaded = false;
LoadCheats();
// Reload the inserted GBA cartridge (if any)
// TODO: report failure there??
//if (ROMPath[ROMSlot_GBA][0] != '\0') NDS::LoadGBAROM(ROMPath[ROMSlot_GBA], SRAMPath[ROMSlot_GBA]);
strncpy(PrevSRAMPath[slot], SRAMPath[slot], 1024); // safety
return Load_OK;
}
else if (slot == ROMSlot_GBA && NDS::LoadGBAROM(romdata, romlength, romfilename, SRAMPath[slot]))
{
SavestateLoaded = false; // checkme??
strncpy(PrevSRAMPath[slot], SRAMPath[slot], 1024); // safety
return Load_OK;
}
else
{
strncpy(ROMPath[slot], oldpath, 1024);
strncpy(SRAMPath[slot], oldsram, 1024);
return Load_ROMLoadError;
}
}
int LoadROM(const char* file, int slot)
{
DSi::CloseDSiNAND();
int res;
bool directboot = Config::DirectBoot != 0;
if (Config::ConsoleType == 1 && slot == 1)
{
// cannot load a GBA ROM into a DSi
return Load_ROMLoadError;
}
res = VerifyDSBIOS();
if (res != Load_OK) return res;
if (Config::ConsoleType == 1)
{
res = VerifyDSiBIOS();
if (res != Load_OK) return res;
res = VerifyDSiFirmware();
if (res != Load_OK) return res;
res = SetupDSiNAND();
if (res != Load_OK) return res;
GBACart::Eject();
ROMPath[ROMSlot_GBA][0] = '\0';
}
else
{
res = VerifyDSFirmware();
if (res != Load_OK)
{
if (res == Load_FirmwareNotBootable)
directboot = true;
else
return res;
}
}
char oldpath[1024];
char oldsram[1024];
strncpy(oldpath, ROMPath[slot], 1024);
strncpy(oldsram, SRAMPath[slot], 1024);
strncpy(ROMPath[slot], file, 1023);
ROMPath[slot][1023] = '\0';
SetupSRAMPath(0);
SetupSRAMPath(1);
NDS::SetConsoleType(Config::ConsoleType);
if (slot == ROMSlot_NDS && NDS::LoadROM(ROMPath[slot], SRAMPath[slot], directboot))
{
SavestateLoaded = false;
LoadCheats();
// Reload the inserted GBA cartridge (if any)
// TODO: report failure there??
if (ROMPath[ROMSlot_GBA][0] != '\0') NDS::LoadGBAROM(ROMPath[ROMSlot_GBA], SRAMPath[ROMSlot_GBA]);
strncpy(PrevSRAMPath[slot], SRAMPath[slot], 1024); // safety
return Load_OK;
}
else if (slot == ROMSlot_GBA && NDS::LoadGBAROM(ROMPath[slot], SRAMPath[slot]))
{
SavestateLoaded = false; // checkme??
strncpy(PrevSRAMPath[slot], SRAMPath[slot], 1024); // safety
return Load_OK;
}
else
{
strncpy(ROMPath[slot], oldpath, 1024);
strncpy(SRAMPath[slot], oldsram, 1024);
return Load_ROMLoadError;
}
}
void UnloadROM(int slot)
{
if (slot == ROMSlot_NDS)
{
// TODO!
}
else if (slot == ROMSlot_GBA)
{
GBACart::Eject();
}
ROMPath[slot][0] = '\0';
DSi::CloseDSiNAND();
}
int Reset()
{
DSi::CloseDSiNAND();
int res;
bool directboot = Config::DirectBoot != 0;
res = VerifyDSBIOS();
if (res != Load_OK) return res;
if (Config::ConsoleType == 1)
{
res = VerifyDSiBIOS();
if (res != Load_OK) return res;
res = VerifyDSiFirmware();
if (res != Load_OK) return res;
res = SetupDSiNAND();
if (res != Load_OK) return res;
GBACart::Eject();
ROMPath[ROMSlot_GBA][0] = '\0';
}
else
{
res = VerifyDSFirmware();
if (res != Load_OK)
{
if (res == Load_FirmwareNotBootable)
directboot = true;
else
return res;
}
}
SavestateLoaded = false;
NDS::SetConsoleType(Config::ConsoleType);
if (ROMPath[ROMSlot_NDS][0] == '\0')
{
NDS::LoadBIOS();
}
else
{
char ext[5] = {0}; int _len = strlen(ROMPath[ROMSlot_NDS]);
strncpy(ext, ROMPath[ROMSlot_NDS] + _len - 4, 4);
if(!strncasecmp(ext, ".nds", 4) || !strncasecmp(ext, ".srl", 4) || !strncasecmp(ext, ".dsi", 4))
{
SetupSRAMPath(0);
if (!NDS::LoadROM(ROMPath[ROMSlot_NDS], SRAMPath[ROMSlot_NDS], directboot))
return Load_ROMLoadError;
}
#ifdef ARCHIVE_SUPPORT_ENABLED
else
{
u8 *romdata = nullptr; u32 romlen;
char romfilename[1024] = {0}, sramfilename[1024];
strncpy(sramfilename, SRAMPath[ROMSlot_NDS], 1024); // Use existing SRAMPath
int pos = strlen(sramfilename) - 1;
while(pos > 0 && sramfilename[pos] != '/' && sramfilename[pos] != '\\')
--pos;
strncpy(romfilename, &sramfilename[pos + 1], 1024);
strncpy(&romfilename[strlen(romfilename) - 3], NDSROMExtension, 3); // extension could be nds, srl or dsi
printf("RESET loading from archive : %s\n", romfilename);
romlen = Archive::ExtractFileFromArchive(ROMPath[ROMSlot_NDS], romfilename, &romdata);
if(!romdata)
return Load_ROMLoadError;
bool ok = NDS::LoadROM(romdata, romlen, sramfilename, directboot);
delete romdata;
if(!ok)
return Load_ROMLoadError;
}
#endif
}
if (ROMPath[ROMSlot_GBA][0] != '\0')
{
char ext[5] = {0}; int _len = strlen(ROMPath[ROMSlot_GBA]);
strncpy(ext, ROMPath[ROMSlot_GBA] + _len - 4, 4);
if(!strncasecmp(ext, ".gba", 4))
{
SetupSRAMPath(1);
if (!NDS::LoadGBAROM(ROMPath[ROMSlot_GBA], SRAMPath[ROMSlot_GBA]))
return Load_ROMLoadError;
}
#ifdef ARCHIVE_SUPPORT_ENABLED
else
{
u8 *romdata = nullptr; u32 romlen;
char romfilename[1024] = {0}, sramfilename[1024];
strncpy(sramfilename, SRAMPath[ROMSlot_GBA], 1024); // Use existing SRAMPath
int pos = strlen(sramfilename) - 1;
while(pos > 0 && sramfilename[pos] != '/' && sramfilename[pos] != '\\')
--pos;
strncpy(romfilename, &sramfilename[pos + 1], 1024);
strncpy(&romfilename[strlen(romfilename) - 3], "gba", 3);
printf("RESET loading from archive : %s\n", romfilename);
romlen = Archive::ExtractFileFromArchive(ROMPath[ROMSlot_GBA], romfilename, &romdata);
if(!romdata)
return Load_ROMLoadError;
bool ok = NDS::LoadGBAROM(romdata, romlen, romfilename, SRAMPath[ROMSlot_GBA]);
delete romdata;
if(!ok)
return Load_ROMLoadError;
}
#endif
}
LoadCheats();
return Load_OK;
}
// SAVESTATE TODO
// * configurable paths. not everyone wants their ROM directory to be polluted, I guess.
void GetSavestateName(int slot, char* filename, int len)
{
int pos;
if (ROMPath[ROMSlot_NDS][0] == '\0') // running firmware, no ROM
{
strcpy(filename, "firmware");
pos = 8;
}
else
{
char *rompath;
char ext[5] = {0}; int _len = strlen(ROMPath[ROMSlot_NDS]);
strncpy(ext, ROMPath[ROMSlot_NDS] + _len - 4, 4);
if(!strncasecmp(ext, ".nds", 4) || !strncasecmp(ext, ".srl", 4) || !strncasecmp(ext, ".dsi", 4))
rompath = ROMPath[ROMSlot_NDS];
else
rompath = SRAMPath[ROMSlot_NDS]; // If archive, construct ssname from sram file
int l = strlen(rompath);
pos = l;
while (rompath[pos] != '.' && pos > 0) pos--;
if (pos == 0) pos = l;
// avoid buffer overflow. shoddy
if (pos > len-5) pos = len-5;
strncpy(&filename[0], rompath, pos);
}
strcpy(&filename[pos], ".ml");
filename[pos+3] = '0'+slot;
filename[pos+4] = '\0';
}
bool SavestateExists(int slot)
{
char ssfile[1024];
GetSavestateName(slot, ssfile, 1024);
return Platform::FileExists(ssfile);
}
bool LoadState(const char* filename)
{
u32 oldGBACartCRC = GBACart::CartCRC;
// backup
Savestate* backup = new Savestate("timewarp.mln", true);
NDS::DoSavestate(backup);
delete backup;
bool failed = false;
Savestate* state = new Savestate(filename, false);
if (state->Error)
{
delete state;
//uiMsgBoxError(MainWindow, "Error", "Could not load savestate file.");
// current state might be crapoed, so restore from sane backup
state = new Savestate("timewarp.mln", false);
failed = true;
}
NDS::DoSavestate(state);
delete state;
if (!failed)
{
if (Config::SavestateRelocSRAM && ROMPath[ROMSlot_NDS][0]!='\0')
{
strncpy(PrevSRAMPath[ROMSlot_NDS], SRAMPath[0], 1024);
strncpy(SRAMPath[ROMSlot_NDS], filename, 1019);
int len = strlen(SRAMPath[ROMSlot_NDS]);
strcpy(&SRAMPath[ROMSlot_NDS][len], ".sav");
SRAMPath[ROMSlot_NDS][len+4] = '\0';
NDS::RelocateSave(SRAMPath[ROMSlot_NDS], false);
}
bool loadedPartialGBAROM = false;
// in case we have a GBA cart inserted, and the GBA ROM changes
// due to having loaded a save state, we do not want to reload
// the previous cartridge on reset, or commit writes to any
// loaded save file. therefore, their paths are "nulled".
if (GBACart::CartInserted && GBACart::CartCRC != oldGBACartCRC)
{
ROMPath[ROMSlot_GBA][0] = '\0';
SRAMPath[ROMSlot_GBA][0] = '\0';
loadedPartialGBAROM = true;
}
// TODO forward this to user in a meaningful way!!
/*char msg[64];
if (slot > 0) sprintf(msg, "State loaded from slot %d%s",
slot, loadedPartialGBAROM ? " (GBA ROM header only)" : "");
else sprintf(msg, "State loaded from file%s",
loadedPartialGBAROM ? " (GBA ROM header only)" : "");
OSD::AddMessage(0, msg);*/
SavestateLoaded = true;
}
return !failed;
}
bool SaveState(const char* filename)
{
Savestate* state = new Savestate(filename, true);
if (state->Error)
{
delete state;
return false;
}
else
{
NDS::DoSavestate(state);
delete state;
if (Config::SavestateRelocSRAM && ROMPath[ROMSlot_NDS][0]!='\0')
{
strncpy(SRAMPath[ROMSlot_NDS], filename, 1019);
int len = strlen(SRAMPath[ROMSlot_NDS]);
strcpy(&SRAMPath[ROMSlot_NDS][len], ".sav");
SRAMPath[ROMSlot_NDS][len+4] = '\0';
NDS::RelocateSave(SRAMPath[ROMSlot_NDS], true);
}
}
return true;
}
void UndoStateLoad()
{
if (!SavestateLoaded) return;
// pray that this works
// what do we do if it doesn't???
// but it should work.
Savestate* backup = new Savestate("timewarp.mln", false);
NDS::DoSavestate(backup);
delete backup;
if (ROMPath[ROMSlot_NDS][0]!='\0')
{
strncpy(SRAMPath[ROMSlot_NDS], PrevSRAMPath[ROMSlot_NDS], 1024);
NDS::RelocateSave(SRAMPath[ROMSlot_NDS], false);
}
}
int ImportSRAM(const char* filename)
{
FILE* file = fopen(filename, "rb");
fseek(file, 0, SEEK_END);
u32 size = ftell(file);
u8* importData = new u8[size];
rewind(file);
fread(importData, size, 1, file);
fclose(file);
int diff = NDS::ImportSRAM(importData, size);
delete[] importData;
return diff;
}
void EnableCheats(bool enable)
{
CheatsOn = enable;
if (CheatFile)
AREngine::SetCodeFile(CheatsOn ? CheatFile : nullptr);
}
}
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