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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
package ethutil
import (
"bytes"
"fmt"
"math/big"
"reflect"
)
// Data values are returned by the rlp decoder. The data values represents
// one item within the rlp data structure. It's responsible for all the casting
// It always returns something valid
type Value struct {
Val interface{}
kind reflect.Value
}
func (val *Value) String() string {
return fmt.Sprintf("%q", val.Val)
}
func NewValue(val interface{}) *Value {
return &Value{Val: val}
}
func (val *Value) Type() reflect.Kind {
return reflect.TypeOf(val.Val).Kind()
}
func (val *Value) IsNil() bool {
return val.Val == nil
}
func (val *Value) Len() int {
//return val.kind.Len()
if data, ok := val.Val.([]interface{}); ok {
return len(data)
} else if data, ok := val.Val.([]byte); ok {
return len(data)
} else if data, ok := val.Val.(string); ok {
return len(data)
}
return 0
}
func (val *Value) Raw() interface{} {
return val.Val
}
func (val *Value) Interface() interface{} {
return val.Val
}
func (val *Value) Uint() uint64 {
if Val, ok := val.Val.(uint8); ok {
return uint64(Val)
} else if Val, ok := val.Val.(uint16); ok {
return uint64(Val)
} else if Val, ok := val.Val.(uint32); ok {
return uint64(Val)
} else if Val, ok := val.Val.(uint64); ok {
return Val
} else if Val, ok := val.Val.(int); ok {
return uint64(Val)
} else if Val, ok := val.Val.(uint); ok {
return uint64(Val)
} else if Val, ok := val.Val.([]byte); ok {
return ReadVarint(bytes.NewReader(Val))
}
return 0
}
func (val *Value) Byte() byte {
if Val, ok := val.Val.(byte); ok {
return Val
}
return 0x0
}
func (val *Value) BigInt() *big.Int {
if a, ok := val.Val.([]byte); ok {
b := new(big.Int).SetBytes(a)
return b
} else if a, ok := val.Val.(*big.Int); ok {
return a
} else {
return big.NewInt(int64(val.Uint()))
}
return big.NewInt(0)
}
func (val *Value) Str() string {
if a, ok := val.Val.([]byte); ok {
return string(a)
} else if a, ok := val.Val.(string); ok {
return a
} else if a, ok := val.Val.(byte); ok {
return string(a)
}
return ""
}
func (val *Value) Bytes() []byte {
if a, ok := val.Val.([]byte); ok {
return a
}
return []byte{}
}
func (val *Value) Slice() []interface{} {
if d, ok := val.Val.([]interface{}); ok {
return d
}
return []interface{}{}
}
func (val *Value) SliceFrom(from int) *Value {
slice := val.Slice()
return NewValue(slice[from:])
}
func (val *Value) SliceTo(to int) *Value {
slice := val.Slice()
return NewValue(slice[:to])
}
func (val *Value) SliceFromTo(from, to int) *Value {
slice := val.Slice()
return NewValue(slice[from:to])
}
// TODO More type checking methods
func (val *Value) IsSlice() bool {
return val.Type() == reflect.Slice
}
func (val *Value) IsStr() bool {
return val.Type() == reflect.String
}
func (val *Value) IsEmpty() bool {
return val.Val == nil || ((val.IsSlice() || val.IsStr()) && val.Len() == 0)
}
// Threat the value as a slice
func (val *Value) Get(idx int) *Value {
if d, ok := val.Val.([]interface{}); ok {
// Guard for oob
if len(d) <= idx {
return NewValue(nil)
}
if idx < 0 {
panic("negative idx for Value Get")
}
return NewValue(d[idx])
}
// If this wasn't a slice you probably shouldn't be using this function
return NewValue(nil)
}
func (val *Value) Cmp(o *Value) bool {
return reflect.DeepEqual(val.Val, o.Val)
}
func (val *Value) Encode() []byte {
return Encode(val.Val)
}
func NewValueFromBytes(data []byte) *Value {
if len(data) != 0 {
data, _ := Decode(data, 0)
return NewValue(data)
}
return NewValue(nil)
}
// Value setters
func NewSliceValue(s interface{}) *Value {
list := EmptyValue()
if s != nil {
if slice, ok := s.([]interface{}); ok {
for _, val := range slice {
list.Append(val)
}
} else if slice, ok := s.([]string); ok {
for _, val := range slice {
list.Append(val)
}
}
}
return list
}
func EmptyValue() *Value {
return NewValue([]interface{}{})
}
func (val *Value) AppendList() *Value {
list := EmptyValue()
val.Val = append(val.Slice(), list)
return list
}
func (val *Value) Append(v interface{}) *Value {
val.Val = append(val.Slice(), v)
return val
}
|
