// Copyright 2013 Google Inc. All rights reserved. // Copyright 2016 the gousb Authors. All rights reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package usb import ( "fmt" ) type BCD uint16 const ( USB_2_0 BCD = 0x0200 USB_1_1 BCD = 0x0110 USB_1_0 BCD = 0x0100 ) func (d BCD) Int() (i int) { ten := 1 for o := uint(0); o < 4; o++ { n := ((0xF << (o * 4)) & d) >> (o * 4) i += int(n) * ten ten *= 10 } return } func (d BCD) String() string { return fmt.Sprintf("%02x.%02x", int(d>>8), int(d&0xFF)) } type ID uint16 func (id ID) String() string { return fmt.Sprintf("%04x", int(id)) }