aboutsummaryrefslogtreecommitdiff
path: root/ber/encode.go
blob: 9e085c42c5576b34cde766aacc8b4398d2af1a0e (plain)
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
package ber

import (
	"bytes"
	"reflect"
)

type encodeState struct {
	bytes.Buffer
}

/*
func Marshal(v interface{}) ([]byte, error) {
	e := &encodeState{}
	err := e.marshal(v)
	if err != nil {
		return nil, err
	}
	return e.Bytes(), nil
}
*/

func (e *encodeState) marshal(v interface{}) (err error) {
	e.reflectValue(reflect.ValueOf(v))
	return nil
}

func (e *encodeState) reflectValue(v reflect.Value) {
	valueEncoder(v)(e, v)
}

type encoderFunc func(e *encodeState, v reflect.Value)

func valueEncoder(v reflect.Value) encoderFunc {
	if !v.IsValid() {
		return invalidValueEncoder
	}
	return newTypeEncoder(v.Type())
}

func invalidValueEncoder(e *encodeState, v reflect.Value) {
	e.WriteByte(0)
}

func newTypeEncoder(t reflect.Type) encoderFunc {
	switch t.Kind() {
	case reflect.Int:
		return intEncoder
	case reflect.Struct:
		return structEncoder
	case reflect.Slice:
		return sliceEncoder
	default:
		return unsupportedTypeEncoder
	}
}

type UnsupportedTypeError struct {
	Type reflect.Type
}

func (e *UnsupportedTypeError) Error() string {
	return "BER: unsupported type: " + e.Type.String()
}

func unsupportedTypeEncoder(e *encodeState, v reflect.Value) {
	e.error(&UnsupportedTypeError{v.Type()})
}

func (e *encodeState) error(err error) {
	panic(err)
}

func intEncoder(e *encodeState, v reflect.Value) {
	/*
		b := MarshalInt(int(v.Int()))
		l := MarshalLen(len(b))
		t := MarshalClass(classUniversal, kindPrimitive, tagInteger)
		e.Write(t)
		e.Write(l)
		e.Write(b)
	*/
}

func objEncoder(e *encodeState, v reflect.Value) {
	/*
		b := MarshalOID(v.Interface().(OID))
		l := MarshalLen(len(b))
		t := MarshalClass(classUniversal, kindPrimitive, tagObjectIdentifier)
		e.Write(t)
		e.Write(l)
		e.Write(b)
	*/
}

func structEncoder(e *encodeState, v reflect.Value) {
	/*
		sube := &encodeState{}
		for i := 0; i < v.NumField(); i++ {
			sube.reflectValue(v.Field(i))
		}
		b := sube.Bytes()
		l := MarshalLen(len(b))
		t := MarshalClass(classUniversal, kindConstructed, tagSequence)
		e.Write(t)
		e.Write(l)
		e.Write(b)
	*/
}

func sliceEncoder(e *encodeState, v reflect.Value) {
	/*
		if v.IsNil() {
			e.Write(MarshalClass(classUniversal, kindPrimitive, tagNull))
			e.Write([]byte{0})
		} else {
			e.Write(v.Bytes())
		}
	*/
}