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choice.go
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/
choice.go
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package der
import (
"errors"
"reflect"
)
type Choice interface {
GetTag() (tag int, err error)
SetTag(tag int) error
Value() interface{}
}
func ChoiceSerializeDER(c Choice, params ...Parameter) (*Node, error) {
tag, ok := getTagByParams(params)
if !ok {
tag, err := c.GetTag()
if err != nil {
return nil, err
}
return valueSerialize(reflect.ValueOf(c.Value()), Tag(tag))
}
n := NewNode(CLASS_CONTEXT_SPECIFIC, tag)
childTag, err := c.GetTag()
if err != nil {
return nil, err
}
child, err := valueSerialize(reflect.ValueOf(c.Value()), Tag(childTag))
if err != nil {
return nil, err
}
nodes := []*Node{child}
n.SetNodes(nodes)
return n, nil
}
func ChoiceDeserializeDER(c Choice, n *Node, params ...Parameter) error {
tag, ok := getTagByParams(params)
if !ok {
tag := n.GetTag()
err := c.SetTag(tag)
if err != nil {
return err
}
return valueDeserialize(reflect.ValueOf(c.Value()), n, Tag(tag))
}
err := CheckNode(n, CLASS_CONTEXT_SPECIFIC, tag)
if err != nil {
return err
}
nodes, err := n.GetNodes()
if err != nil {
return err
}
if len(nodes) == 0 {
return errors.New("nodes length = 0")
}
child := nodes[0]
childTag := child.GetTag()
if err = c.SetTag(childTag); err != nil {
return err
}
return valueDeserialize(reflect.ValueOf(c.Value()), child, Tag(childTag))
}