/usr/share/gocode/src/gopkg.in/vmihailenco/msgpack.v2/ext.go is in golang-gopkg-vmihailenco-msgpack.v2-dev 2.4.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | package msgpack
import (
"bytes"
"fmt"
"reflect"
"sync"
"gopkg.in/vmihailenco/msgpack.v2/codes"
)
var (
extTypes [128]reflect.Type
)
var bufferPool = &sync.Pool{
New: func() interface{} {
return &bytes.Buffer{}
},
}
func RegisterExt(id int8, value interface{}) {
if extTypes[id] != nil {
panic(fmt.Errorf("ext with id %d is already registered", id))
}
extTypes[id] = reflect.TypeOf(value)
}
func extTypeId(typ reflect.Type) int8 {
for id, t := range extTypes {
if t == typ {
return int8(id)
}
}
return -1
}
func makeExtEncoder(id int8, enc encoderFunc) encoderFunc {
return func(e *Encoder, v reflect.Value) error {
buf := bufferPool.Get().(*bytes.Buffer)
defer bufferPool.Put(buf)
buf.Reset()
oldw := e.w
e.w = buf
err := enc(e, v)
e.w = oldw
if err != nil {
return err
}
if err := e.encodeExtLen(buf.Len()); err != nil {
return err
}
if err := e.w.WriteByte(byte(id)); err != nil {
return err
}
return e.write(buf.Bytes())
}
}
func (e *Encoder) encodeExtLen(l int) error {
if l == 1 {
return e.w.WriteByte(codes.FixExt1)
}
if l == 2 {
return e.w.WriteByte(codes.FixExt2)
}
if l == 4 {
return e.w.WriteByte(codes.FixExt4)
}
if l == 8 {
return e.w.WriteByte(codes.FixExt8)
}
if l == 16 {
return e.w.WriteByte(codes.FixExt16)
}
if l < 256 {
return e.write1(codes.Ext8, uint64(l))
}
if l < 65536 {
return e.write2(codes.Ext16, uint64(l))
}
return e.write4(codes.Ext32, uint64(l))
}
func (d *Decoder) decodeExtLen() (int, error) {
c, err := d.r.ReadByte()
if err != nil {
return 0, err
}
return d.extLen(c)
}
func (d *Decoder) extLen(c byte) (int, error) {
switch c {
case codes.FixExt1:
return 1, nil
case codes.FixExt2:
return 2, nil
case codes.FixExt4:
return 4, nil
case codes.FixExt8:
return 8, nil
case codes.FixExt16:
return 16, nil
case codes.Ext8:
n, err := d.uint8()
return int(n), err
case codes.Ext16:
n, err := d.uint16()
return int(n), err
case codes.Ext32:
n, err := d.uint32()
return int(n), err
default:
return 0, fmt.Errorf("msgpack: invalid code %x decoding ext length", c)
}
}
func (d *Decoder) decodeExt() (interface{}, error) {
c, err := d.r.ReadByte()
if err != nil {
return 0, err
}
return d.ext(c)
}
func (d *Decoder) ext(c byte) (interface{}, error) {
// TODO: use decoded length.
_, err := d.extLen(c)
if err != nil {
return nil, err
}
extId, err := d.r.ReadByte()
if err != nil {
return nil, err
}
typ := extTypes[extId]
if typ == nil {
return nil, fmt.Errorf("msgpack: unregistered ext id %d", extId)
}
v := reflect.New(typ).Elem()
if err := d.DecodeValue(v); err != nil {
return nil, err
}
return v.Interface(), nil
}
func (d *Decoder) skipExt(c byte) error {
n, err := d.extLen(c)
if err != nil {
return err
}
return d.skipN(n)
}
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