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deserializer.go
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/
deserializer.go
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package der
import (
"errors"
"fmt"
"reflect"
)
func Deserialize(v interface{}, n *Node, params ...Parameter) error {
return valueDeserialize(reflect.ValueOf(v), n, params...)
}
func valueDeserialize(v reflect.Value, n *Node, params ...Parameter) error {
if v.Kind() != reflect.Ptr {
return errors.New("der deserialize: value is not ptr")
}
fn := getDeserializeFunc(v.Type())
return fn(v, n, params...)
}
type deserializeFunc func(v reflect.Value, n *Node, params ...Parameter) error
func getDeserializeFunc(t reflect.Type) deserializeFunc {
if t.Implements(typeDeserializer) {
return funcDeserialize
}
switch k := t.Kind(); k {
case reflect.Bool:
return boolDeserialize
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return intDeserialize
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return uintDeserialize
case reflect.String:
return stringDeserialize
case reflect.Struct:
return structDeserialize
case reflect.Ptr:
return newPtrDeserialize(t)
case reflect.Array:
return newArrayDeserialize(t)
case reflect.Slice:
return newSliceDeserialize(t)
default:
return deserializeUnsupportedType(t)
}
}
func deserializeUnsupportedType(t reflect.Type) deserializeFunc {
err := fmt.Errorf("der: deserialize unsupported type %s", t.Kind())
return func(v reflect.Value, n *Node, params ...Parameter) error {
return err
}
}
func funcDeserialize(v reflect.Value, n *Node, params ...Parameter) error {
d := v.Interface().(Deserializer)
return d.DeserializeDER(n, params...)
}
func newSliceDeserialize(t reflect.Type) deserializeFunc {
if t.Elem().Kind() == reflect.Uint8 {
return bytesDeserialize
}
return newArrayDeserialize(t)
}