First cut

usb/error.go

@@ -0,0 +1,45 @@
+package usb
+
+// #cgo LDFLAGS: -lusb-1.0
+// #include <libusb-1.0/libusb.h>
+import "C"
+
+type usbError C.int
+
+func (e usbError) Error() string {
+	return "libusb: " + usbErrorString[e]
+}
+
+const (
+	SUCCESS             usbError = C.LIBUSB_SUCCESS
+	ERROR_IO            usbError = C.LIBUSB_ERROR_IO
+	ERROR_INVALID_PARAM usbError = C.LIBUSB_ERROR_INVALID_PARAM
+	ERROR_ACCESS        usbError = C.LIBUSB_ERROR_ACCESS
+	ERROR_NO_DEVICE     usbError = C.LIBUSB_ERROR_NO_DEVICE
+	ERROR_NOT_FOUND     usbError = C.LIBUSB_ERROR_NOT_FOUND
+	ERROR_BUSY          usbError = C.LIBUSB_ERROR_BUSY
+	ERROR_TIMEOUT       usbError = C.LIBUSB_ERROR_TIMEOUT
+	ERROR_OVERFLOW      usbError = C.LIBUSB_ERROR_OVERFLOW
+	ERROR_PIPE          usbError = C.LIBUSB_ERROR_PIPE
+	ERROR_INTERRUPTED   usbError = C.LIBUSB_ERROR_INTERRUPTED
+	ERROR_NO_MEM        usbError = C.LIBUSB_ERROR_NO_MEM
+	ERROR_NOT_SUPPORTED usbError = C.LIBUSB_ERROR_NOT_SUPPORTED
+	ERROR_OTHER         usbError = C.LIBUSB_ERROR_OTHER
+)
+
+var usbErrorString = map[usbError]string{
+	C.LIBUSB_SUCCESS:             "success",
+	C.LIBUSB_ERROR_IO:            "i/o error",
+	C.LIBUSB_ERROR_INVALID_PARAM: "invalid param",
+	C.LIBUSB_ERROR_ACCESS:        "bad access",
+	C.LIBUSB_ERROR_NO_DEVICE:     "no device",
+	C.LIBUSB_ERROR_NOT_FOUND:     "not found",
+	C.LIBUSB_ERROR_BUSY:          "device or resource busy",
+	C.LIBUSB_ERROR_TIMEOUT:       "timeout",
+	C.LIBUSB_ERROR_OVERFLOW:      "overflow",
+	C.LIBUSB_ERROR_PIPE:          "pipe error",
+	C.LIBUSB_ERROR_INTERRUPTED:   "interrupted",
+	C.LIBUSB_ERROR_NO_MEM:        "out of memory",
+	C.LIBUSB_ERROR_NOT_SUPPORTED: "not supported",
+	C.LIBUSB_ERROR_OTHER:         "unknown error",
+}