| // Protocol Buffers for Go with Gadgets |
| // |
| // Copyright (c) 2013, The GoGo Authors. All rights reserved. |
| // http://github.com/gogo/protobuf |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| package test |
| |
| import ( |
| "bytes" |
| "encoding/hex" |
| "encoding/json" |
| ) |
| |
| func PutLittleEndianUint64(b []byte, offset int, v uint64) { |
| b[offset] = byte(v) |
| b[offset+1] = byte(v >> 8) |
| b[offset+2] = byte(v >> 16) |
| b[offset+3] = byte(v >> 24) |
| b[offset+4] = byte(v >> 32) |
| b[offset+5] = byte(v >> 40) |
| b[offset+6] = byte(v >> 48) |
| b[offset+7] = byte(v >> 56) |
| } |
| |
| type Uuid []byte |
| |
| func (uuid Uuid) Bytes() []byte { |
| return uuid |
| } |
| |
| func (uuid Uuid) Marshal() ([]byte, error) { |
| if len(uuid) == 0 { |
| return nil, nil |
| } |
| return []byte(uuid), nil |
| } |
| |
| func (uuid Uuid) MarshalTo(data []byte) (n int, err error) { |
| if len(uuid) == 0 { |
| return 0, nil |
| } |
| copy(data, uuid) |
| return 16, nil |
| } |
| |
| func (uuid *Uuid) Unmarshal(data []byte) error { |
| if len(data) == 0 { |
| uuid = nil |
| return nil |
| } |
| id := Uuid(make([]byte, 16)) |
| copy(id, data) |
| *uuid = id |
| return nil |
| } |
| |
| func (uuid *Uuid) Size() int { |
| if uuid == nil { |
| return 0 |
| } |
| if len(*uuid) == 0 { |
| return 0 |
| } |
| return 16 |
| } |
| |
| func (uuid Uuid) MarshalJSON() ([]byte, error) { |
| s := hex.EncodeToString([]byte(uuid)) |
| return json.Marshal(s) |
| } |
| |
| func (uuid *Uuid) UnmarshalJSON(data []byte) error { |
| var s string |
| err := json.Unmarshal(data, &s) |
| if err != nil { |
| return err |
| } |
| d, err := hex.DecodeString(s) |
| if err != nil { |
| return err |
| } |
| *uuid = Uuid(d) |
| return nil |
| } |
| |
| func (uuid Uuid) Equal(other Uuid) bool { |
| return bytes.Equal(uuid[0:], other[0:]) |
| } |
| |
| func (uuid Uuid) Compare(other Uuid) int { |
| return bytes.Compare(uuid[0:], other[0:]) |
| } |
| |
| type int63 interface { |
| Int63() int64 |
| } |
| |
| func NewPopulatedUuid(r int63) *Uuid { |
| u := RandV4(r) |
| return &u |
| } |
| |
| func RandV4(r int63) Uuid { |
| uuid := make(Uuid, 16) |
| uuid.RandV4(r) |
| return uuid |
| } |
| |
| func (uuid Uuid) RandV4(r int63) { |
| PutLittleEndianUint64(uuid, 0, uint64(r.Int63())) |
| PutLittleEndianUint64(uuid, 8, uint64(r.Int63())) |
| uuid[6] = (uuid[6] & 0xf) | 0x40 |
| uuid[8] = (uuid[8] & 0x3f) | 0x80 |
| } |