Method decodeInternedString

intern.go:130–185

(intern bool)

}

func (d *Decoder) decodeInternedString(intern bool) (string, error) {
	c, err := d.readCode()
	if err != nil {
		return "", err
	}

	if msgpcode.IsFixedString(c) {
		n := int(c & msgpcode.FixedStrMask)
		return d.decodeInternedStringWithLen(n, intern)
	}

	switch c {
	case msgpcode.Nil:
		return "", nil
	case msgpcode.FixExt1, msgpcode.FixExt2, msgpcode.FixExt4:
		typeID, extLen, err := d.extHeader(c)
		if err != nil {
			return "", err
		}
		if typeID != internedStringExtID {
			err := fmt.Errorf("msgpack: got ext type=%d, wanted %d",
				typeID, internedStringExtID)
			return "", err
		}

		idx, err := d.decodeInternedStringIndex(extLen)
		if err != nil {
			return "", err
		}

		return d.internedStringAtIndex(idx)
	case msgpcode.Str8, msgpcode.Bin8:
		n, err := d.uint8()
		if err != nil {
			return "", err
		}
		return d.decodeInternedStringWithLen(int(n), intern)
	case msgpcode.Str16, msgpcode.Bin16:
		n, err := d.uint16()
		if err != nil {
			return "", err
		}
		return d.decodeInternedStringWithLen(int(n), intern)
	case msgpcode.Str32, msgpcode.Bin32:
		n, err := d.uint32()
		if err != nil {
			return "", err
		}
		return d.decodeInternedStringWithLen(int(n), intern)
	}

	return "", unexpectedCodeError{
		code: c,
		hint: "interned string",
	}
}

func (d *Decoder) decodeInternedStringIndex(extLen int) (int, error) {