static bool TryParseReportDescriptor(IntPtr device, out ReportDescriptors.Parser.ReportDescriptorParser parser, out byte[] reportDescriptor) { parser = null; reportDescriptor = null; string devnode = NativeMethods.udev_device_get_devnode(device); if (null == devnode) { return false; } int handle = NativeMethods.retry(() => NativeMethods.open (devnode, NativeMethods.oflag.NONBLOCK)); if (handle < 0) { return false; } try { uint descsize; if (NativeMethods.ioctl(handle, NativeMethods.HIDIOCGRDESCSIZE, out descsize) < 0) { return false; } if (descsize > NativeMethods.HID_MAX_DESCRIPTOR_SIZE) { return false; } var desc = new NativeMethods.hidraw_report_descriptor() { size = descsize }; if (NativeMethods.ioctl(handle, NativeMethods.HIDIOCGRDESC, ref desc) < 0) { return false; } Array.Resize(ref desc.value, (int)descsize); parser = new ReportDescriptors.Parser.ReportDescriptorParser(); parser.Parse(desc.value); reportDescriptor = desc.value; return true; } finally { NativeMethods.retry(() => NativeMethods.close(handle)); } }
static bool TryParseReportDescriptor(IntPtr device, out ReportDescriptors.Parser.ReportDescriptorParser parser, out byte[] reportDescriptor) { parser = null; reportDescriptor = null; string devnode = NativeMethods.udev_device_get_devnode(device); if (null == devnode) { return(false); } int handle = NativeMethods.retry(() => NativeMethods.open (devnode, NativeMethods.oflag.NONBLOCK)); if (handle < 0) { return(false); } try { uint descsize; if (NativeMethods.ioctl(handle, NativeMethods.HIDIOCGRDESCSIZE, out descsize) < 0) { return(false); } if (descsize > NativeMethods.HID_MAX_DESCRIPTOR_SIZE) { return(false); } var desc = new NativeMethods.hidraw_report_descriptor() { size = descsize }; if (NativeMethods.ioctl(handle, NativeMethods.HIDIOCGRDESC, ref desc) < 0) { return(false); } Array.Resize(ref desc.value, (int)descsize); parser = new ReportDescriptors.Parser.ReportDescriptorParser(); parser.Parse(desc.value); reportDescriptor = desc.value; return(true); } catch (Exception e) { Debug.Print("{0}", e); throw; } finally { NativeMethods.retry(() => NativeMethods.close(handle)); } }