147 lines
3.8 KiB
Go
147 lines
3.8 KiB
Go
// Protocol Buffers for Go with Gadgets
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//
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// Copyright (c) 2013, The GoGo Authors. All rights reserved.
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// http://github.com/gogo/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/*
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Package custom contains custom types for test and example purposes.
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These types are used by the test structures generated by gogoprotobuf.
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*/
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package custom
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import (
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"bytes"
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"encoding/json"
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"errors"
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"unsafe"
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)
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type Uint128 [2]uint64
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func (u Uint128) Marshal() ([]byte, error) {
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buffer := make([]byte, 16)
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_, err := u.MarshalTo(buffer)
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return buffer, err
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}
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func (u Uint128) MarshalTo(data []byte) (n int, err error) {
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PutLittleEndianUint128(data, 0, u)
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return 16, nil
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}
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func GetLittleEndianUint64(b []byte, offset int) uint64 {
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return *(*uint64)(unsafe.Pointer(&b[offset]))
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}
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func PutLittleEndianUint64(b []byte, offset int, v uint64) {
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b[offset] = byte(v)
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b[offset+1] = byte(v >> 8)
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b[offset+2] = byte(v >> 16)
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b[offset+3] = byte(v >> 24)
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b[offset+4] = byte(v >> 32)
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b[offset+5] = byte(v >> 40)
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b[offset+6] = byte(v >> 48)
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b[offset+7] = byte(v >> 56)
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}
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func PutLittleEndianUint128(buffer []byte, offset int, v [2]uint64) {
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PutLittleEndianUint64(buffer, offset, v[0])
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PutLittleEndianUint64(buffer, offset+8, v[1])
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}
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func GetLittleEndianUint128(buffer []byte, offset int) (value [2]uint64) {
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value[0] = GetLittleEndianUint64(buffer, offset)
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value[1] = GetLittleEndianUint64(buffer, offset+8)
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return
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}
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func (u *Uint128) Unmarshal(data []byte) error {
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if data == nil {
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u = nil
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return nil
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}
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if len(data) == 0 {
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pu := Uint128{}
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*u = pu
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return nil
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}
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if len(data) != 16 {
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return errors.New("Uint128: invalid length")
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}
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pu := Uint128(GetLittleEndianUint128(data, 0))
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*u = pu
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return nil
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}
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func (u Uint128) MarshalJSON() ([]byte, error) {
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data, err := u.Marshal()
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if err != nil {
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return nil, err
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}
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return json.Marshal(data)
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}
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func (u Uint128) Size() int {
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return 16
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}
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func (u *Uint128) UnmarshalJSON(data []byte) error {
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v := new([]byte)
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err := json.Unmarshal(data, v)
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if err != nil {
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return err
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}
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return u.Unmarshal(*v)
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}
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func (this Uint128) Equal(that Uint128) bool {
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return this == that
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}
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func (this Uint128) Compare(that Uint128) int {
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thisdata, err := this.Marshal()
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if err != nil {
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panic(err)
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}
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thatdata, err := that.Marshal()
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if err != nil {
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panic(err)
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}
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return bytes.Compare(thisdata, thatdata)
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}
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type randy interface {
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Intn(n int) int
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}
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func NewPopulatedUint128(r randy) *Uint128 {
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data := make([]byte, 16)
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for i := 0; i < 16; i++ {
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data[i] = byte(r.Intn(255))
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}
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u := Uint128(GetLittleEndianUint128(data, 0))
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return &u
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}
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