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
|
package pgproto3
import (
"bytes"
"encoding/json"
"errors"
)
type Close struct {
ObjectType byte // 'S' = prepared statement, 'P' = portal
Name string
}
// Frontend identifies this message as sendable by a PostgreSQL frontend.
func (*Close) Frontend() {}
// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
// type identifier and 4 byte message length.
func (dst *Close) Decode(src []byte) error {
if len(src) < 2 {
return &invalidMessageFormatErr{messageType: "Close"}
}
dst.ObjectType = src[0]
rp := 1
idx := bytes.IndexByte(src[rp:], 0)
if idx != len(src[rp:])-1 {
return &invalidMessageFormatErr{messageType: "Close"}
}
dst.Name = string(src[rp : len(src)-1])
return nil
}
// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
func (src *Close) Encode(dst []byte) ([]byte, error) {
dst, sp := beginMessage(dst, 'C')
dst = append(dst, src.ObjectType)
dst = append(dst, src.Name...)
dst = append(dst, 0)
return finishMessage(dst, sp)
}
// MarshalJSON implements encoding/json.Marshaler.
func (src Close) MarshalJSON() ([]byte, error) {
return json.Marshal(struct {
Type string
ObjectType string
Name string
}{
Type: "Close",
ObjectType: string(src.ObjectType),
Name: src.Name,
})
}
// UnmarshalJSON implements encoding/json.Unmarshaler.
func (dst *Close) UnmarshalJSON(data []byte) error {
// Ignore null, like in the main JSON package.
if string(data) == "null" {
return nil
}
var msg struct {
ObjectType string
Name string
}
if err := json.Unmarshal(data, &msg); err != nil {
return err
}
if len(msg.ObjectType) != 1 {
return errors.New("invalid length for Close.ObjectType")
}
dst.ObjectType = byte(msg.ObjectType[0])
dst.Name = msg.Name
return nil
}
|
