M src/platform/qt/CMakeLists.txt → src/platform/qt/CMakeLists.txt

@@ -28,7 +28,8 @@ AudioProcessor.cpp
 	Display.cpp
 	GameController.cpp
 	LogView.cpp
-	Window.cpp)
+	Window.cpp
+	VFileDevice.cpp)
 
 qt5_wrap_ui(UI_FILES
 	LogView.ui)

A src/platform/qt/VFileDevice.cpp

@@ -0,0 +1,30 @@
+#include "VFileDevice.h"
+
+extern "C" {
+#include "util/vfs.h"
+}
+
+using namespace QGBA;
+
+VFileDevice::VFileDevice(VFile* vf, QObject* parent)
+	: QIODevice(parent)
+	, m_vf(vf)
+{
+	// Nothing to do
+}
+
+qint64 VFileDevice::readData(char* data, qint64 maxSize) {
+	return m_vf->read(m_vf, data, maxSize);
+}
+
+qint64 VFileDevice::writeData(const char* data, qint64 maxSize) {
+	return m_vf->write(m_vf, data, maxSize);
+}
+
+qint64 VFileDevice::size() const {
+	// TODO: Add size method to VFile so this can be actually const
+	ssize_t pos = m_vf->seek(m_vf, 0, SEEK_CUR);
+	qint64 size = m_vf->seek(m_vf, 0, SEEK_END);
+	m_vf->seek(m_vf, pos, SEEK_SET);
+	return size;
+}

A src/platform/qt/VFileDevice.h

@@ -0,0 +1,27 @@
+#ifndef QGBA_VFILE_DEVICE
+#define QGBA_VFILE_DEVICE
+
+#include <QFileDevice>
+
+struct VFile;
+
+namespace QGBA {
+
+class VFileDevice : public QIODevice {
+Q_OBJECT
+
+public:
+	VFileDevice(VFile* vf, QObject* parent = nullptr);
+
+protected:
+	virtual qint64 readData(char* data, qint64 maxSize) override;
+	virtual qint64 writeData(const char* data, qint64 maxSize) override;
+	virtual qint64 size() const override;
+
+private:
+	mutable VFile* m_vf;
+};
+
+}
+
+#endif