GBA: Create GameShark snapshots

CHANGES

@@ -6,6 +6,7 @@ Features:
  - Volume control
  - More shortcuts are editable (e.g. quick save/load, solar sensor)
  - Rewind now shows the frame after rewinding
+ - Import/Export of GameShark/Action Replay snapshots
 Bugfixes:
  - GBA: Fix timers not updating timing when writing to only the reload register
  - All: Fix sanitize-deb script not cleaning up after itself

src/gba/sharkport.c

@@ -143,3 +143,110 @@ cleanup:
 	free(payload);
 	return false;
 }
+
+
+bool GBASavedataExportSharkPort(const struct GBA* gba, struct VFile* vf) {
+	char buffer[0x1C];
+	uint32_t size = strlen(SHARKPORT_HEADER);
+	STORE_32(size, 0, buffer);
+	if (vf->write(vf, buffer, 4) < 4) {
+		return false;
+	}
+	if (vf->write(vf, SHARKPORT_HEADER, size) < size) {
+		return false;
+	}
+
+	size = 0x000F0000;
+	STORE_32(size, 0, buffer);
+	if (vf->write(vf, buffer, 4) < 4) {
+		return false;
+	}
+
+	const struct GBACartridge* cart = (const struct GBACartridge*) gba->memory.rom;
+	size = sizeof(cart->title);
+	STORE_32(size, 0, buffer);
+	if (vf->write(vf, buffer, 4) < 4) {
+		return false;
+	}
+	if (vf->write(vf, cart->title, size) < 4) {
+		return false;
+	}
+
+	time_t t = time(0);
+	struct tm* tm = localtime(&t);
+	size = strftime(&buffer[4], sizeof(buffer) - 4, "%m/%d/%Y %I:%M:%S %p", tm);
+	STORE_32(size, 0, buffer);
+	if (vf->write(vf, buffer, size + 4) < size + 4) {
+		return false;
+	}
+
+	// Last field is blank
+	size = 0;
+	STORE_32(size, 0, buffer);
+	if (vf->write(vf, buffer, 4) < 4) {
+		return false;
+	}
+
+	// Write payload
+	size = 0x1C;
+	switch (gba->memory.savedata.type) {
+	case SAVEDATA_SRAM:
+		size += SIZE_CART_SRAM;
+		break;
+	case SAVEDATA_FLASH512:
+		size += SIZE_CART_FLASH512;
+		break;
+	case SAVEDATA_FLASH1M:
+		size += SIZE_CART_FLASH1M;
+		break;
+	case SAVEDATA_EEPROM:
+		size += SIZE_CART_EEPROM;
+		break;
+	case SAVEDATA_FORCE_NONE:
+	case SAVEDATA_AUTODETECT:
+		return false;
+	}
+	STORE_32(size, 0, buffer);
+	if (vf->write(vf, buffer, 4) < 4) {
+		return false;
+	}
+	size -= 0x1C;
+
+	memcpy(buffer, cart->title, 16);
+	buffer[0x10] = 0;
+	buffer[0x11] = 0;
+	buffer[0x12] = cart->checksum;
+	buffer[0x13] = cart->maker;
+	buffer[0x14] = 1;
+	buffer[0x15] = 0;
+	buffer[0x16] = 0;
+	buffer[0x17] = 0;
+	buffer[0x18] = 0;
+	buffer[0x19] = 0;
+	buffer[0x1A] = 0;
+	buffer[0x1B] = 0;
+	if (vf->write(vf, buffer, 0x1C) < 0x1C) {
+		return false;
+	}
+
+	uint32_t checksum = 0;
+	uint32_t i;
+	for (i = 0; i < 0x1C; ++i) {
+		checksum += buffer[i] << (checksum % 24);
+	}
+
+	if (vf->write(vf, gba->memory.savedata.data, size) < size) {
+		return false;
+	}
+
+	for (i = 0; i < size; ++i) {
+		checksum += ((char) gba->memory.savedata.data[i]) << (checksum % 24);
+	}
+
+	STORE_32(checksum, 0, buffer);
+	if (vf->write(vf, buffer, 4) < 4) {
+		return false;
+	}
+
+	return true;
+}

src/platform/qt/GameController.cpp

@@ -311,6 +311,20 @@ void GameController::importSharkport(const QString& path) {
 	vf->close(vf);
 }
 
+void GameController::exportSharkport(const QString& path) {
+	if (!m_gameOpen) {
+		return;
+	}
+	VFile* vf = VFileOpen(path.toLocal8Bit().constData(), O_WRONLY | O_CREAT | O_TRUNC);
+	if (!vf) {
+		return;
+	}
+	threadInterrupt();
+	GBASavedataExportSharkPort(m_threadContext.gba, vf);
+	threadContinue();
+	vf->close(vf);
+}
+
 void GameController::closeGame() {
 	if (!m_gameOpen) {
 		return;

src/platform/qt/GameController.h

@@ -99,6 +99,7 @@ public slots:
 	void setUseBIOS(bool);
 	void loadPatch(const QString& path);
 	void importSharkport(const QString& path);
+	void exportSharkport(const QString& path);
 	void openGame();
 	void closeGame();
 	void setPaused(bool paused);

src/platform/qt/Window.cpp

@@ -270,6 +270,21 @@ void Window::importSharkport() {
 	}
 }
 
+void Window::exportSharkport() {
+	bool doPause = m_controller->isLoaded() && !m_controller->isPaused();
+	if (doPause) {
+		m_controller->setPaused(true);
+	}
+	QString filename = QFileDialog::getSaveFileName(this, tr("Select save"), m_config->getQtOption("lastDirectory").toString(), tr("GameShark saves (*.sps *.xps)"));
+	if (doPause) {
+		m_controller->setPaused(false);
+	}
+	if (!filename.isEmpty()) {
+		m_config->setQtOption("lastDirectory", QFileInfo(filename).dir().path());
+		m_controller->exportSharkport(filename);
+	}
+}
+
 void Window::openKeymapWindow() {
 	GBAKeyEditor* keyEditor = new GBAKeyEditor(&m_inputController, InputController::KEYBOARD);
 	openView(keyEditor);
@@ -620,10 +635,15 @@ void Window::setupMenu(QMenuBar* menubar) {
 	}
 
 	fileMenu->addSeparator();
-	QAction* loadSharkport = new QAction(tr("Import GameShark Save"), fileMenu);
-	connect(loadSharkport, SIGNAL(triggered()), this, SLOT(importSharkport()));
-	m_gameActions.append(loadSharkport);
-	addControlledAction(fileMenu, loadSharkport, "loadSharkport");
+	QAction* importShark = new QAction(tr("Import GameShark Save"), fileMenu);
+	connect(importShark, SIGNAL(triggered()), this, SLOT(importSharkport()));
+	m_gameActions.append(importShark);
+	addControlledAction(fileMenu, importShark, "importShark");
+
+	QAction* exportShark = new QAction(tr("Export GameShark Save"), fileMenu);
+	connect(exportShark, SIGNAL(triggered()), this, SLOT(exportSharkport()));
+	m_gameActions.append(exportShark);
+	addControlledAction(fileMenu, exportShark, "exportShark");
 
 	fileMenu->addSeparator();
 	QAction* multiWindow = new QAction(tr("New multiplayer window"), fileMenu);

src/platform/qt/Window.h

@@ -66,6 +66,7 @@ public slots:
 	void saveConfig();
 
 	void importSharkport();
+	void exportSharkport();
 
 	void openKeymapWindow();
 	void openSettingsWindow();