-
Notifications
You must be signed in to change notification settings - Fork 0
/
rpc.go
125 lines (113 loc) · 2.37 KB
/
rpc.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
// Package implements an internal mechanism to communicate with an impress terminal.
package rpc
import (
"encoding/binary"
"errors"
"fmt"
"io"
"log"
"os"
)
type mutexer interface {
Lock()
Unlock()
}
type flushWriter interface {
io.Writer
Flush() error
}
type Pipe struct {
mutex mutexer
writer flushWriter
reader io.Reader
err error
}
func NewPipe(mutex mutexer, writer flushWriter, reader io.Reader) *Pipe {
return &Pipe{
mutex: mutex,
writer: writer,
reader: reader,
}
}
func (p *Pipe) Lock() *Pipe {
p.mutex.Lock()
p.err = nil
return p
}
func (p *Pipe) Unlock() *Pipe {
p.mutex.Unlock()
return p
}
func (p *Pipe) Flush() *Pipe {
if p.err != nil {
return p
}
p.err = p.writer.Flush()
return p
}
func (p *Pipe) Err() error {
return p.err
}
func (p *Pipe) Get(variables ...interface{}) *Pipe {
for _, v := range variables {
switch variable := v.(type) {
case *byte:
p.err = binary.Read(p.reader, binary.LittleEndian, variable)
case *[]byte:
p.err = p.getBytes(variable)
case *bool:
p.err = binary.Read(p.reader, binary.LittleEndian, variable)
case *int:
p.err = p.getInt(variable)
case *[]int:
p.err = p.getInts(variable)
case *uint16:
p.err = binary.Read(p.reader, binary.LittleEndian, variable)
case *uint32:
p.err = binary.Read(p.reader, binary.LittleEndian, variable)
case *string:
p.err = p.getString(variable)
default:
p.err = fmt.Errorf("unknown type: %T", v)
}
if p.err != nil && !errors.Is(p.err, os.ErrClosed) && !errors.Is(p.err, io.EOF) {
log.Printf("get: %v", p.err)
return p
}
}
return p
}
func (p *Pipe) Put(values ...interface{}) *Pipe {
for _, v := range values {
switch value := v.(type) {
case byte:
p.err = binary.Write(p.writer, binary.LittleEndian, value)
case []byte:
p.err = p.putBytes(value)
case bool:
p.err = binary.Write(p.writer, binary.LittleEndian, value)
case int:
p.err = p.putInt(value)
case []int:
p.err = p.putInts(value)
case uint16:
p.err = binary.Write(p.writer, binary.LittleEndian, value)
case uint32:
p.err = binary.Write(p.writer, binary.LittleEndian, value)
case string:
p.err = p.putString(value)
default:
p.err = fmt.Errorf("unknown type: %T", v)
}
if p.err != nil {
log.Printf("put: %v", p.err)
return p
}
}
return p
}
func (p *Pipe) Sync() error {
p.Lock()
defer p.Unlock()
return p.Flush().Err()
}