-
Notifications
You must be signed in to change notification settings - Fork 0
/
cell.go
182 lines (150 loc) · 3.95 KB
/
cell.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
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
// Copyright © 2017-2018 The IPFN Developers. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cells
import (
"encoding/json"
"fmt"
cid "gx/ipfs/QmR8BauakNcBa3RbE4nbQu76PDiJgoQgz8AJdhJuiU4TAw/go-cid"
mh "gx/ipfs/QmerPMzPk1mJVowm8KgmoknWa4yCYvvugMPsgWmDNUvDLW/go-multihash"
)
// Cell - Operation cell interface.
type Cell interface {
// CID - Operation CID.
CID() CID
// OpCode - Operation ID.
OpCode() ID
// Memory - Operation memory.
Memory() []byte
// Child - Child cell by index.
Child(int) Cell
// ChildrenSize - Amount of children.
ChildrenSize() int
// Marshal - Marshals cell.
Marshal() ([]byte, error)
fmt.Stringer
}
// MutableCell - Mutable cell interface.
type MutableCell interface {
Cell
// AddChildren - Adds children.
AddChildren(...Cell)
// SetOpCode - Sets operation ID.
SetOpCode(ID)
// SetMemory - Set operation memory.
SetMemory([]byte)
// SetChildren - Set operation children.
SetChildren([]Cell)
}
// BinaryCell - Binary representation of cell.
type BinaryCell struct {
opCode ID
memory []byte
children []Cell
cid CID
body []byte
}
// CellPrefix - Binary cell CID prefix.
var CellPrefix = cid.Prefix{
Version: 1,
Codec: 0x70bc,
MhType: mh.SHA2_256,
MhLength: 32,
}
// CID - Computes marshaled cell cid.
func (cell *BinaryCell) CID() (_ CID) {
if cell.cid.Defined() {
return cell.cid
}
body, err := cell.Marshal()
if err != nil {
panic(err)
}
cell.cid, err = SumCID(CellPrefix, body)
if err != nil {
panic(err)
}
return cell.cid
}
// OpCode - Operation ID.
func (cell *BinaryCell) OpCode() ID {
return cell.opCode
}
// Memory - Operation memory.
func (cell *BinaryCell) Memory() []byte {
return cell.memory
}
// Child - Child cell by index.
func (cell *BinaryCell) Child(n int) Cell {
if len(cell.children) <= n {
return nil
}
return cell.children[n]
}
// ChildrenSize - Amount of children.
func (cell *BinaryCell) ChildrenSize() int {
return len(cell.children)
}
// AddChildren - Appends new children operation.
func (cell *BinaryCell) AddChildren(children ...Cell) {
cell.children = append(cell.children, children...)
cell.reset()
}
// SetOpCode - Sets operation ID.
func (cell *BinaryCell) SetOpCode(opCode ID) {
cell.opCode = opCode
cell.reset()
}
// SetMemory - Set operation memory.
func (cell *BinaryCell) SetMemory(memory []byte) {
cell.memory = memory
cell.reset()
}
// SetChildren - Set operation children.
func (cell *BinaryCell) SetChildren(children []Cell) {
cell.children = children
cell.reset()
}
// Checksum - Computes marshalled xxhash64 of cell content id.
func (cell *BinaryCell) Checksum() (_ ID, err error) {
return NewID(cell.CID().Bytes()), nil
}
// String - Prints to string.
func (cell *BinaryCell) String() string {
return string(prettyPrint(cell))
}
// Marshal - Marshals cell.
func (cell *BinaryCell) Marshal() (_ []byte, err error) {
return Marshal(cell)
}
// MarshalJSON - Marshals cell as JSON.
func (cell *BinaryCell) MarshalJSON() (_ []byte, err error) {
type jsonCell struct {
OpCode ID `json:"op,omitempty"`
Memory []byte `json:"value,omitempty"`
Children []*CellPrinter `json:"ops,omitempty"`
}
children := make([]*CellPrinter, len(cell.children))
for n, child := range cell.children {
children[n] = NewPrinter(child)
}
return json.Marshal(jsonCell{
OpCode: cell.opCode,
Memory: cell.memory,
Children: children,
})
}
func (cell *BinaryCell) reset() {
cell.cid = UndefCID
cell.body = nil
}