Function hid_internal_get_device_info

lib/hidapi/windows/hid.c:696–757

}

static struct hid_device_info *hid_internal_get_device_info(const wchar_t *path, HANDLE handle)
{
	struct hid_device_info *dev = NULL; /* return object */
	HIDD_ATTRIBUTES attrib;
	PHIDP_PREPARSED_DATA pp_data = NULL;
	HIDP_CAPS caps;
	wchar_t string[MAX_STRING_WCHARS];

	/* Create the record. */
	dev = (struct hid_device_info*)calloc(1, sizeof(struct hid_device_info));

	if (dev == NULL) {
		return NULL;
	}

	/* Fill out the record */
	dev->next = NULL;
	dev->path = hid_internal_UTF16toUTF8(path);
	dev->interface_number = -1;

	attrib.Size = sizeof(HIDD_ATTRIBUTES);
	if (HidD_GetAttributes(handle, &attrib)) {
		/* VID/PID */
		dev->vendor_id = attrib.VendorID;
		dev->product_id = attrib.ProductID;

		/* Release Number */
		dev->release_number = attrib.VersionNumber;
	}

	/* Get the Usage Page and Usage for this device. */
	if (HidD_GetPreparsedData(handle, &pp_data)) {
		if (HidP_GetCaps(pp_data, &caps) == HIDP_STATUS_SUCCESS) {
			dev->usage_page = caps.UsagePage;
			dev->usage = caps.Usage;
		}

		HidD_FreePreparsedData(pp_data);
	}

	/* Serial Number */
	string[0] = L'\0';
	HidD_GetSerialNumberString(handle, string, sizeof(string));
	string[MAX_STRING_WCHARS - 1] = L'\0';
	dev->serial_number = _wcsdup(string);

	/* Manufacturer String */
	string[0] = L'\0';
	HidD_GetManufacturerString(handle, string, sizeof(string));
	string[MAX_STRING_WCHARS - 1] = L'\0';
	dev->manufacturer_string = _wcsdup(string);

	/* Product String */
	string[0] = L'\0';
	HidD_GetProductString(handle, string, sizeof(string));
	string[MAX_STRING_WCHARS - 1] = L'\0';
	dev->product_string = _wcsdup(string);