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path: root/ber/dump.go
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package ber

import (
	"fmt"
)

func Dump(b []byte) string {
	return newState(b).dump(0)
}

func (s *state) universal(h Header) string {
	switch h.Tag {
	case tagInteger, tagEnumerated:
		return fmt.Sprint(s.unmarshalInt())
	case tagBoolean:
		return fmt.Sprint(s.unmarshalBool())
	case tagObjectIdentifier:
		return fmt.Sprint(s.unmarshalOID())
	case tagBitString:
		return fmt.Sprint(s.unmarshalBitString())
	case tagIA5String, tagOctetString:
		return fmt.Sprint(s.unmarshalString())
	default:
		return fmt.Sprint(s.next())
	}
}

func (s *state) dump(indent int) (ret string) {
	if s.Len() == 0 {
		return ""
	}
	for s.Len() > 0 {
		h := s.unmarshalClass()
		ret += fmt.Sprintf("%3d: %*s", s.Len(), 2*indent, "")
		switch h.Kind {
		case kindPrimitive:
			switch h.Class {
			case classUniversal:
				ret += fmt.Sprintln(h.Tag, "=", s.universal(h))
			default:
				ret += fmt.Sprintln(h.Class, int(h.Tag), "=",
					s.next())
			}
		case kindConstructed:
			switch h.Class {
			case classUniversal:
				ret += fmt.Sprintln(h.Tag, "→")
			default:
				ret += fmt.Sprintln(h.Class, int(h.Tag), "→")
			}
			ret += s.subState().dump(indent + 1)
		}
	}
	return ret + s.dump(indent)
}