1 files changed, 199 insertions, 0 deletions
diff --git a/core/android.cpp b/core/android.cpp
new file mode 100644
index 000000000..3631b07a1
--- /dev/null
+++ b/core/android.cpp
@@ -0,0 +1,199 @@
+/* implements Android specific functions */
+#include "dive.h"
+#include "display.h"
+#include <string.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <libusb.h>
+#include <errno.h>
+
+#include <QtAndroidExtras/QtAndroidExtras>
+#include <QtAndroidExtras/QAndroidJniObject>
+#include <QtAndroid>
+
+#define FTDI_VID 0x0403
+#define USB_SERVICE "usb"
+
+extern "C" {
+
+const char android_system_divelist_default_font[] = "Roboto";
+const char *system_divelist_default_font = android_system_divelist_default_font;
+double system_divelist_default_font_size = -1;
+
+int get_usb_fd(uint16_t idVendor, uint16_t idProduct);
+void subsurface_OS_pref_setup(void)
+{
+	// Abusing this function to get a decent place where we can wire in
+	// our open callback into libusb
+#ifdef libusb_android_open_callback_func
+	libusb_set_android_open_callback(get_usb_fd);
+#elif __ANDROID__
+#error we need libusb_android_open_callback
+#endif
+}
+
+bool subsurface_ignore_font(const char *font)
+{
+	// there are no old default fonts that we would want to ignore
+	return false;
+}
+
+void subsurface_user_info(struct user_info *user)
+{ /* Encourage use of at least libgit2-0.20 */ }
+
+static const char *system_default_path_append(const char *append)
+{
+	// Qt appears to find a working path for us - let's just go with that
+	QString path = QStandardPaths::standardLocations(QStandardPaths::DataLocation).first();
+
+	if (append)
+		path += QString("/%1").arg(append);
+
+	return strdup(path.toUtf8().data());
+}
+
+const char *system_default_directory(void)
+{
+	static const char *path = NULL;
+	if (!path)
+		path = system_default_path_append(NULL);
+	return path;
+}
+
+const char *system_default_filename(void)
+{
+	static const char *filename = "subsurface.xml";
+	static const char *path = NULL;
+	if (!path)
+		path = system_default_path_append(filename);
+	return path;
+}
+
+int enumerate_devices(device_callback_t callback, void *userdata, int dc_type)
+{
+	/* FIXME: we need to enumerate in some other way on android */
+	/* qtserialport maybee? */
+	return -1;
+}
+
+/**
+ * Get the file descriptor of first available matching device attached to usb in android.
+ *
+ * returns a fd to the device, or -1 and errno is set.
+ */
+int get_usb_fd(uint16_t idVendor, uint16_t idProduct)
+{
+	int i;
+	jint fd, vendorid, productid;
+	QAndroidJniObject usbName, usbDevice;
+
+	// Get the current main activity of the application.
+	QAndroidJniObject activity = QtAndroid::androidActivity();
+
+	QAndroidJniObject usb_service = QAndroidJniObject::fromString(USB_SERVICE);
+
+	// Get UsbManager from activity
+	QAndroidJniObject usbManager = activity.callObjectMethod("getSystemService", "(Ljava/lang/String;)Ljava/lang/Object;", usb_service.object());
+
+	// Get a HashMap<Name, UsbDevice> of all USB devices attached to Android
+	QAndroidJniObject deviceMap = usbManager.callObjectMethod("getDeviceList", "()Ljava/util/HashMap;");
+	jint num_devices = deviceMap.callMethod<jint>("size", "()I");
+	if (num_devices == 0) {
+		// No USB device is attached.
+		return -1;
+	}
+
+	// Iterate over all the devices and find the first available FTDI device.
+	QAndroidJniObject keySet = deviceMap.callObjectMethod("keySet", "()Ljava/util/Set;");
+	QAndroidJniObject iterator = keySet.callObjectMethod("iterator", "()Ljava/util/Iterator;");
+
+	for (i = 0; i < num_devices; i++) {
+		usbName = iterator.callObjectMethod("next", "()Ljava/lang/Object;");
+		usbDevice = deviceMap.callObjectMethod ("get", "(Ljava/lang/Object;)Ljava/lang/Object;", usbName.object());
+		vendorid = usbDevice.callMethod<jint>("getVendorId", "()I");
+		productid = usbDevice.callMethod<jint>("getProductId", "()I");
+		if(vendorid == idVendor && productid == idProduct) // Found the requested device
+			break;
+	}
+	if (i == num_devices) {
+		// No device found.
+		errno = ENOENT;
+		return -1;
+	}
+
+	jboolean hasPermission = usbManager.callMethod<jboolean>("hasPermission", "(Landroid/hardware/usb/UsbDevice;)Z", usbDevice.object());
+	if (!hasPermission) {
+		// You do not have permission to use the usbDevice.
+		// Please remove and reinsert the USB device.
+		// Could also give an dialogbox asking for permission.
+		errno = EPERM;
+		return -1;
+	}
+
+	// An device is present and we also have permission to use the device.
+	// Open the device and get its file descriptor.
+	QAndroidJniObject usbDeviceConnection = usbManager.callObjectMethod("openDevice", "(Landroid/hardware/usb/UsbDevice;)Landroid/hardware/usb/UsbDeviceConnection;", usbDevice.object());
+	if (usbDeviceConnection.object() == NULL) {
+		// Some error occurred while opening the device. Exit.
+		errno = EINVAL;
+		return -1;
+	}
+
+	// Finally get the required file descriptor.
+	fd = usbDeviceConnection.callMethod<jint>("getFileDescriptor", "()I");
+	if (fd == -1) {
+		// The device is not opened. Some error.
+		errno = ENODEV;
+		return -1;
+	}
+	return fd;
+}
+
+/* NOP wrappers to comform with windows.c */
+int subsurface_rename(const char *path, const char *newpath)
+{
+	return rename(path, newpath);
+}
+
+int subsurface_open(const char *path, int oflags, mode_t mode)
+{
+	return open(path, oflags, mode);
+}
+
+FILE *subsurface_fopen(const char *path, const char *mode)
+{
+	return fopen(path, mode);
+}
+
+void *subsurface_opendir(const char *path)
+{
+	return (void *)opendir(path);
+}
+
+int subsurface_access(const char *path, int mode)
+{
+	return access(path, mode);
+}
+
+struct zip *subsurface_zip_open_readonly(const char *path, int flags, int *errorp)
+{
+	return zip_open(path, flags, errorp);
+}
+
+int subsurface_zip_close(struct zip *zip)
+{
+	return zip_close(zip);
+}
+
+/* win32 console */
+void subsurface_console_init(bool dedicated)
+{
+	/* NOP */
+}
+
+void subsurface_console_exit(void)
+{
+	/* NOP */
+}
+}