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/*
Copyright 2016-2023 melonDS team
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 <stdlib.h>
#include <string.h>
#include <string>
#include <QCoreApplication>
#include <QStandardPaths>
#include <QString>
#include <QDateTime>
#include <QDir>
#include <QThread>
#include <QSemaphore>
#include <QMutex>
#include <QOpenGLContext>
#include <QSharedMemory>
#include <QTemporaryFile>
#include <SDL_loadso.h>
#include "Platform.h"
#include "Config.h"
#include "ROMManager.h"
#include "CameraManager.h"
#include "LAN_Socket.h"
#include "LAN_PCap.h"
#include "LocalMP.h"
#include "SPI_Firmware.h"
#ifdef __WIN32__
#define fseek _fseeki64
#define ftell _ftelli64
#endif // __WIN32__
std::string EmuDirectory;
extern CameraManager* camManager[2];
void emuStop();
// TEMP
//#include "main.h"
//extern MainWindow* mainWindow;
namespace melonDS::Platform
{
void PathInit(int argc, char** argv)
{
// First, check for the portable directory next to the executable.
QString appdirpath = QCoreApplication::applicationDirPath();
QString portablepath = appdirpath + QDir::separator() + "portable";
#if defined(__APPLE__)
// On Apple platforms we may need to navigate outside an app bundle.
// The executable directory would be "melonDS.app/Contents/MacOS", so we need to go a total of three steps up.
QDir bundledir(appdirpath);
if (bundledir.cd("..") && bundledir.cd("..") && bundledir.dirName().endsWith(".app") && bundledir.cd(".."))
{
portablepath = bundledir.absolutePath() + QDir::separator() + "portable";
}
#endif
QDir portabledir(portablepath);
if (portabledir.exists())
{
EmuDirectory = portabledir.absolutePath().toStdString();
}
else
{
// If no overrides are specified, use the default path.
#if defined(__WIN32__) && defined(WIN32_PORTABLE)
EmuDirectory = appdirpath.toStdString();
#else
QString confdir;
QDir config(QStandardPaths::writableLocation(QStandardPaths::ConfigLocation));
config.mkdir("melonDS");
confdir = config.absolutePath() + QDir::separator() + "melonDS";
EmuDirectory = confdir.toStdString();
#endif
}
}
QSharedMemory* IPCBuffer = nullptr;
int IPCInstanceID;
void IPCInit()
{
IPCInstanceID = 0;
IPCBuffer = new QSharedMemory("melonIPC");
#if !defined(Q_OS_WINDOWS)
// QSharedMemory instances can be left over from crashed processes on UNIX platforms.
// To prevent melonDS thinking there's another instance, we attach and then immediately detach from the
// shared memory. If no other process was actually using it, it'll be destroyed and we'll have a clean
// shared memory buffer after creating it again below.
if (IPCBuffer->attach())
{
IPCBuffer->detach();
delete IPCBuffer;
IPCBuffer = new QSharedMemory("melonIPC");
}
#endif
if (!IPCBuffer->attach())
{
Log(LogLevel::Info, "IPC sharedmem doesn't exist. creating\n");
if (!IPCBuffer->create(1024))
{
Log(LogLevel::Error, "IPC sharedmem create failed: %s\n", IPCBuffer->errorString().toStdString().c_str());
delete IPCBuffer;
IPCBuffer = nullptr;
return;
}
IPCBuffer->lock();
memset(IPCBuffer->data(), 0, IPCBuffer->size());
IPCBuffer->unlock();
}
IPCBuffer->lock();
u8* data = (u8*)IPCBuffer->data();
u16 mask = *(u16*)&data[0];
for (int i = 0; i < 16; i++)
{
if (!(mask & (1<<i)))
{
IPCInstanceID = i;
*(u16*)&data[0] |= (1<<i);
break;
}
}
IPCBuffer->unlock();
Log(LogLevel::Info, "IPC: instance ID %d\n", IPCInstanceID);
}
void IPCDeInit()
{
if (IPCBuffer)
{
IPCBuffer->lock();
u8* data = (u8*)IPCBuffer->data();
*(u16*)&data[0] &= ~(1<<IPCInstanceID);
IPCBuffer->unlock();
IPCBuffer->detach();
delete IPCBuffer;
}
IPCBuffer = nullptr;
}
void Init(int argc, char** argv)
{
PathInit(argc, argv);
IPCInit();
}
void DeInit()
{
IPCDeInit();
}
void SignalStop(StopReason reason)
{
emuStop();
switch (reason)
{
case StopReason::GBAModeNotSupported:
Log(LogLevel::Error, "!! GBA MODE NOT SUPPORTED\n");
//mainWindow->osdAddMessage(0xFFA0A0, "GBA mode not supported.");
break;
case StopReason::BadExceptionRegion:
//mainWindow->osdAddMessage(0xFFA0A0, "Internal error.");
break;
case StopReason::PowerOff:
case StopReason::External:
//mainWindow->osdAddMessage(0xFFC040, "Shutdown");
default:
break;
}
}
int InstanceID()
{
return IPCInstanceID;
}
std::string InstanceFileSuffix()
{
int inst = IPCInstanceID;
if (inst == 0) return "";
char suffix[16] = {0};
snprintf(suffix, 15, ".%d", inst+1);
return suffix;
}
static QIODevice::OpenMode GetQMode(FileMode mode)
{
QIODevice::OpenMode qmode = QIODevice::OpenModeFlag::NotOpen;
if (mode & FileMode::Read)
qmode |= QIODevice::OpenModeFlag::ReadOnly;
if (mode & FileMode::Write)
qmode |= QIODevice::OpenModeFlag::WriteOnly;
if (mode & FileMode::Append)
qmode |= QIODevice::OpenModeFlag::Append;
if ((mode & FileMode::Write) && !(mode & FileMode::Preserve))
qmode |= QIODevice::OpenModeFlag::Truncate;
if (mode & FileMode::NoCreate)
qmode |= QIODevice::OpenModeFlag::ExistingOnly;
if (mode & FileMode::Text)
qmode |= QIODevice::OpenModeFlag::Text;
return qmode;
}
constexpr char AccessMode(FileMode mode, bool file_exists)
{
if (mode & FileMode::Append)
return 'a';
if (!(mode & FileMode::Write))
// If we're only opening the file for reading...
return 'r';
if (mode & (FileMode::NoCreate))
// If we're not allowed to create a new file...
return 'r'; // Open in "r+" mode (IsExtended will add the "+")
if ((mode & FileMode::Preserve) && file_exists)
// If we're not allowed to overwrite a file that already exists...
return 'r'; // Open in "r+" mode (IsExtended will add the "+")
return 'w';
}
constexpr bool IsExtended(FileMode mode)
{
// fopen's "+" flag always opens the file for read/write
return (mode & FileMode::ReadWrite) == FileMode::ReadWrite;
}
static std::string GetModeString(FileMode mode, bool file_exists)
{
std::string modeString;
modeString += AccessMode(mode, file_exists);
if (IsExtended(mode))
modeString += '+';
if (!(mode & FileMode::Text))
modeString += 'b';
return modeString;
}
FileHandle* OpenFile(const std::string& path, FileMode mode)
{
if ((mode & (FileMode::ReadWrite | FileMode::Append)) == FileMode::None)
{ // If we aren't reading or writing, then we can't open the file
Log(LogLevel::Error, "Attempted to open \"%s\" in neither read nor write mode (FileMode 0x%x)\n", path.c_str(), mode);
return nullptr;
}
QString qpath{QString::fromStdString(path)};
std::string modeString = GetModeString(mode, QFile::exists(qpath));
QIODevice::OpenMode qmode = GetQMode(mode);
QFile qfile{qpath};
qfile.open(qmode);
FILE* file = fdopen(dup(qfile.handle()), modeString.c_str());
qfile.close();
if (file)
{
Log(LogLevel::Debug, "Opened \"%s\" with FileMode 0x%x (effective mode \"%s\")\n", path.c_str(), mode, modeString.c_str());
return reinterpret_cast<FileHandle *>(file);
}
else
{
Log(LogLevel::Warn, "Failed to open \"%s\" with FileMode 0x%x (effective mode \"%s\")\n", path.c_str(), mode, modeString.c_str());
return nullptr;
}
}
FileHandle* OpenLocalFile(const std::string& path, FileMode mode)
{
QString qpath = QString::fromStdString(path);
QDir dir(qpath);
QString fullpath;
if (dir.isAbsolute())
{
// If it's an absolute path, just open that.
fullpath = qpath;
}
else
{
fullpath = QString::fromStdString(EmuDirectory) + QDir::separator() + qpath;
}
return OpenFile(fullpath.toStdString(), mode);
}
bool CloseFile(FileHandle* file)
{
return fclose(reinterpret_cast<FILE *>(file)) == 0;
}
bool IsEndOfFile(FileHandle* file)
{
return feof(reinterpret_cast<FILE *>(file)) != 0;
}
bool FileReadLine(char* str, int count, FileHandle* file)
{
return fgets(str, count, reinterpret_cast<FILE *>(file)) != nullptr;
}
bool FileExists(const std::string& name)
{
FileHandle* f = OpenFile(name, FileMode::Read);
if (!f) return false;
CloseFile(f);
return true;
}
bool LocalFileExists(const std::string& name)
{
FileHandle* f = OpenLocalFile(name, FileMode::Read);
if (!f) return false;
CloseFile(f);
return true;
}
bool CheckFileWritable(const std::string& filepath)
{
FileHandle* file = Platform::OpenFile(filepath.c_str(), FileMode::Read);
if (file)
{
// if the file exists, check if it can be opened for writing.
Platform::CloseFile(file);
file = Platform::OpenFile(filepath.c_str(), FileMode::Append);
if (file)
{
Platform::CloseFile(file);
return true;
}
else return false;
}
else
{
// if the file does not exist, create a temporary file to check, to avoid creating an empty file.
if (QTemporaryFile(filepath.c_str()).open())
{
return true;
}
else return false;
}
}
bool CheckLocalFileWritable(const std::string& name)
{
FileHandle* file = Platform::OpenLocalFile(name.c_str(), FileMode::Append);
if (file)
{
Platform::CloseFile(file);
return true;
}
else return false;
}
bool FileSeek(FileHandle* file, s64 offset, FileSeekOrigin origin)
{
int stdorigin;
switch (origin)
{
case FileSeekOrigin::Start: stdorigin = SEEK_SET; break;
case FileSeekOrigin::Current: stdorigin = SEEK_CUR; break;
case FileSeekOrigin::End: stdorigin = SEEK_END; break;
}
return fseek(reinterpret_cast<FILE *>(file), offset, stdorigin) == 0;
}
void FileRewind(FileHandle* file)
{
rewind(reinterpret_cast<FILE *>(file));
}
u64 FileRead(void* data, u64 size, u64 count, FileHandle* file)
{
return fread(data, size, count, reinterpret_cast<FILE *>(file));
}
bool FileFlush(FileHandle* file)
{
return fflush(reinterpret_cast<FILE *>(file)) == 0;
}
u64 FileWrite(const void* data, u64 size, u64 count, FileHandle* file)
{
return fwrite(data, size, count, reinterpret_cast<FILE *>(file));
}
u64 FileWriteFormatted(FileHandle* file, const char* fmt, ...)
{
if (fmt == nullptr)
return 0;
va_list args;
va_start(args, fmt);
u64 ret = vfprintf(reinterpret_cast<FILE *>(file), fmt, args);
va_end(args);
return ret;
}
u64 FileLength(FileHandle* file)
{
FILE* stdfile = reinterpret_cast<FILE *>(file);
long pos = ftell(stdfile);
fseek(stdfile, 0, SEEK_END);
long len = ftell(stdfile);
fseek(stdfile, pos, SEEK_SET);
return len;
}
void Log(LogLevel level, const char* fmt, ...)
{
if (fmt == nullptr)
return;
va_list args;
va_start(args, fmt);
vprintf(fmt, args);
va_end(args);
}
Thread* Thread_Create(std::function<void()> func)
{
QThread* t = QThread::create(func);
t->start();
return (Thread*) t;
}
void Thread_Free(Thread* thread)
{
QThread* t = (QThread*) thread;
t->terminate();
delete t;
}
void Thread_Wait(Thread* thread)
{
((QThread*) thread)->wait();
}
Semaphore* Semaphore_Create()
{
return (Semaphore*)new QSemaphore();
}
void Semaphore_Free(Semaphore* sema)
{
delete (QSemaphore*) sema;
}
void Semaphore_Reset(Semaphore* sema)
{
QSemaphore* s = (QSemaphore*) sema;
s->acquire(s->available());
}
void Semaphore_Wait(Semaphore* sema)
{
((QSemaphore*) sema)->acquire();
}
void Semaphore_Post(Semaphore* sema, int count)
{
((QSemaphore*) sema)->release(count);
}
Mutex* Mutex_Create()
{
return (Mutex*)new QMutex();
}
void Mutex_Free(Mutex* mutex)
{
delete (QMutex*) mutex;
}
void Mutex_Lock(Mutex* mutex)
{
((QMutex*) mutex)->lock();
}
void Mutex_Unlock(Mutex* mutex)
{
((QMutex*) mutex)->unlock();
}
bool Mutex_TryLock(Mutex* mutex)
{
return ((QMutex*) mutex)->try_lock();
}
void Sleep(u64 usecs)
{
QThread::usleep(usecs);
}
void WriteNDSSave(const u8* savedata, u32 savelen, u32 writeoffset, u32 writelen)
{
if (ROMManager::NDSSave)
ROMManager::NDSSave->RequestFlush(savedata, savelen, writeoffset, writelen);
}
void WriteGBASave(const u8* savedata, u32 savelen, u32 writeoffset, u32 writelen)
{
if (ROMManager::GBASave)
ROMManager::GBASave->RequestFlush(savedata, savelen, writeoffset, writelen);
}
void WriteFirmware(const Firmware& firmware, u32 writeoffset, u32 writelen)
{
if (!ROMManager::FirmwareSave)
return;
if (firmware.GetHeader().Identifier != GENERATED_FIRMWARE_IDENTIFIER)
{ // If this is not the default built-in firmware...
// ...then write the whole thing back.
ROMManager::FirmwareSave->RequestFlush(firmware.Buffer(), firmware.Length(), writeoffset, writelen);
}
else
{
u32 eapstart = firmware.GetExtendedAccessPointOffset();
u32 eapend = eapstart + sizeof(firmware.GetExtendedAccessPoints());
u32 apstart = firmware.GetWifiAccessPointOffset();
u32 apend = apstart + sizeof(firmware.GetAccessPoints());
// assert that the extended access points come just before the regular ones
assert(eapend == apstart);
if (eapstart <= writeoffset && writeoffset < apend)
{ // If we're writing to the access points...
const u8* buffer = firmware.GetExtendedAccessPointPosition();
u32 length = sizeof(firmware.GetExtendedAccessPoints()) + sizeof(firmware.GetAccessPoints());
ROMManager::FirmwareSave->RequestFlush(buffer, length, writeoffset - eapstart, writelen);
}
}
}
void WriteDateTime(int year, int month, int day, int hour, int minute, int second)
{
QDateTime hosttime = QDateTime::currentDateTime();
QDateTime time = QDateTime(QDate(year, month, day), QTime(hour, minute, second));
Config::RTCOffset = hosttime.secsTo(time);
Config::Save();
}
bool MP_Init()
{
return LocalMP::Init();
}
void MP_DeInit()
{
return LocalMP::DeInit();
}
void MP_Begin()
{
return LocalMP::Begin();
}
void MP_End()
{
return LocalMP::End();
}
int MP_SendPacket(u8* data, int len, u64 timestamp)
{
return LocalMP::SendPacket(data, len, timestamp);
}
int MP_RecvPacket(u8* data, u64* timestamp)
{
return LocalMP::RecvPacket(data, timestamp);
}
int MP_SendCmd(u8* data, int len, u64 timestamp)
{
return LocalMP::SendCmd(data, len, timestamp);
}
int MP_SendReply(u8* data, int len, u64 timestamp, u16 aid)
{
return LocalMP::SendReply(data, len, timestamp, aid);
}
int MP_SendAck(u8* data, int len, u64 timestamp)
{
return LocalMP::SendAck(data, len, timestamp);
}
int MP_RecvHostPacket(u8* data, u64* timestamp)
{
return LocalMP::RecvHostPacket(data, timestamp);
}
u16 MP_RecvReplies(u8* data, u64 timestamp, u16 aidmask)
{
return LocalMP::RecvReplies(data, timestamp, aidmask);
}
bool LAN_Init()
{
if (Config::DirectLAN)
{
if (!LAN_PCap::Init(true))
return false;
}
else
{
if (!LAN_Socket::Init())
return false;
}
return true;
}
void LAN_DeInit()
{
// checkme. blarg
//if (Config::DirectLAN)
// LAN_PCap::DeInit();
//else
// LAN_Socket::DeInit();
LAN_PCap::DeInit();
LAN_Socket::DeInit();
}
int LAN_SendPacket(u8* data, int len)
{
if (Config::DirectLAN)
return LAN_PCap::SendPacket(data, len);
else
return LAN_Socket::SendPacket(data, len);
}
int LAN_RecvPacket(u8* data)
{
if (Config::DirectLAN)
return LAN_PCap::RecvPacket(data);
else
return LAN_Socket::RecvPacket(data);
}
void Camera_Start(int num)
{
return camManager[num]->start();
}
void Camera_Stop(int num)
{
return camManager[num]->stop();
}
void Camera_CaptureFrame(int num, u32* frame, int width, int height, bool yuv)
{
return camManager[num]->captureFrame(frame, width, height, yuv);
}
DynamicLibrary* DynamicLibrary_Load(const char* lib)
{
return (DynamicLibrary*) SDL_LoadObject(lib);
}
void DynamicLibrary_Unload(DynamicLibrary* lib)
{
SDL_UnloadObject(lib);
}
void* DynamicLibrary_LoadFunction(DynamicLibrary* lib, const char* name)
{
return SDL_LoadFunction(lib, name);
}
}
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