Add string descriptor retrieval to libusbemu.

This is a prerequisite for adding open-by-serial-number functionality.

Signed-off-by: Drew Fisher <[email protected]>

Author: zarvox

platform/windows/libusb10emu/libusb-1.0/libusb.h

@@ -71,6 +71,9 @@ typedef struct libusb_device_handle_t libusb_device_handle;
 int libusb_open(libusb_device* dev, libusb_device_handle** handle);
 void libusb_close(libusb_device_handle*	dev_handle);
 
+int libusb_get_string_descriptor(libusb_device_handle *dev_handle, uint8_t desc_index, uint16_t langid, unsigned char *data, int length);
+int libusb_get_string_descriptor_ascii(libusb_device_handle *dev_handle, uint8_t desc_index, unsigned char *data, int length);
+
 int libusb_set_configuration(libusb_device_handle *dev, int configuration);
 int libusb_claim_interface(libusb_device_handle* dev, int interface_number);
 int libusb_release_interface(libusb_device_handle* dev, int interface_number);

platform/windows/libusb10emu/libusb-1.0/libusbemu.cpp

@@ -264,6 +264,25 @@ void libusb_close(libusb_device_handle*	dev_handle)
   libusbemu_unregister_device(device);
 }
 
+int libusb_get_string_descriptor(libusb_device_handle *dev_handle, uint8_t desc_index, uint16_t langid, unsigned char *data, int length)
+{
+  RAIIMutex lock (dev_handle->dev->ctx->mutex);
+  int bytes = usb_get_string(dev_handle->handle, (int)desc_index, (int)langid, (char*)data, (size_t)length);
+  if (bytes < 0) {
+    LIBUSBEMU_ERROR_LIBUSBWIN32();
+  }
+  return bytes;
+}
+int libusb_get_string_descriptor_ascii(libusb_device_handle *dev_handle, uint8_t desc_index, unsigned char *data, int length)
+{
+  RAIIMutex lock (dev_handle->dev->ctx->mutex);
+  int bytes = usb_get_string_simple(dev_handle->handle, (int)desc_index, (char*)data, (size_t)length);
+  if (bytes < 0) {
+    LIBUSBEMU_ERROR_LIBUSBWIN32();
+  }
+  return bytes;
+}
+
 int libusb_set_configuration(libusb_device_handle *dev, int configuration)
 {
   RAIIMutex lock (dev->dev->ctx->mutex);