-
Notifications
You must be signed in to change notification settings - Fork 10
/
vector.go
147 lines (131 loc) · 3 KB
/
vector.go
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
package idl
import (
"bytes"
"fmt"
"github.com/aviate-labs/leb128"
"math/big"
"reflect"
)
type VectorType struct {
Type Type
}
func NewVectorType(t Type) *VectorType {
return &VectorType{
Type: t,
}
}
func (vec VectorType) AddTypeDefinition(tdt *TypeDefinitionTable) error {
if err := vec.Type.AddTypeDefinition(tdt); err != nil {
return err
}
id, err := leb128.EncodeSigned(big.NewInt(vecType))
if err != nil {
return err
}
v_, err := vec.Type.EncodeType(tdt)
if err != nil {
return err
}
tdt.Add(vec, concat(id, v_))
return nil
}
func (vec VectorType) Decode(r *bytes.Reader) (any, error) {
l, err := leb128.DecodeUnsigned(r)
if err != nil {
return nil, err
}
var vs []any
for i := 0; i < int(l.Int64()); i++ {
v_, err := vec.Type.Decode(r)
if err != nil {
return nil, err
}
vs = append(vs, v_)
}
return vs, nil
}
func (vec VectorType) EncodeType(tdt *TypeDefinitionTable) ([]byte, error) {
idx, ok := tdt.Indexes[vec.String()]
if !ok {
return nil, fmt.Errorf("missing type index for: %s", vec)
}
return leb128.EncodeSigned(big.NewInt(int64(idx)))
}
func (vec VectorType) EncodeValue(v any) ([]byte, error) {
vs_, ok := v.([]any)
if !ok {
v_ := reflect.ValueOf(v)
if v_.Kind() == reflect.Array || v_.Kind() == reflect.Slice {
for i := 0; i < v_.Len(); i++ {
vs_ = append(vs_, v_.Index(i).Interface())
}
} else {
return nil, NewEncodeValueError(v, vecType)
}
}
l, err := leb128.EncodeSigned(big.NewInt(int64(len(vs_))))
if err != nil {
return nil, err
}
var vs []byte
for _, value := range vs_ {
v_, err := vec.Type.EncodeValue(value)
if err != nil {
return nil, err
}
vs = append(vs, v_...)
}
return concat(l, vs), nil
}
func (vec VectorType) String() string {
return fmt.Sprintf("vec %s", vec.Type)
}
func (vec VectorType) UnmarshalGo(raw any, _v any) error {
v, ok := checkIsPtr(_v)
if !ok {
return NewUnmarshalGoError(raw, _v)
}
if v.Kind() != reflect.Slice && v.Kind() != reflect.Array {
return NewUnmarshalGoError(raw, _v)
}
if raw == nil {
// Empty vector/slice.
v.Set(reflect.Zero(v.Type()))
return nil
}
if v.Kind() == reflect.Slice && v.IsNil() {
// Create new slice.
v.Set(reflect.MakeSlice(v.Type(), 0, 0))
}
rv := reflect.ValueOf(raw)
if v.Kind() == reflect.Array {
// Check if array is big enough.
if rv.Len() != v.Len() {
return NewUnmarshalGoError(raw, _v)
}
}
if rv.Kind() != reflect.Slice && rv.Kind() != reflect.Array {
return NewUnmarshalGoError(raw, _v)
}
if v.Len() > rv.Len() {
// Truncate slice.
v.Set(v.Slice(0, rv.Len()))
}
for i := 0; i < rv.Len(); i++ {
rv := rv.Index(i).Interface()
if i < v.Len() {
// Reuse existing element.
if err := vec.Type.UnmarshalGo(rv, v.Index(i).Addr().Interface()); err != nil {
return err
}
} else {
n := reflect.New(v.Type().Elem()) // Create new element.
if err := vec.Type.UnmarshalGo(rv, n.Interface()); err != nil {
return err
}
// Append new element.
v.Set(reflect.Append(v, n.Elem()))
}
}
return nil
}