Function parseNumber

integer.go:39–92

parseNumber parses as defined in https://httpwg.org/specs/rfc9651.html#parse-number.

(s *scanner)

// parseNumber parses as defined in
// https://httpwg.org/specs/rfc9651.html#parse-number.
func parseNumber(s *scanner) (interface{}, error) {
	neg := isNeg(s)
	if neg && s.eof() {
		return 0, &UnmarshalError{s.off, ErrUnexpectedEndOfString}
	}

	if !isDigit(s.data[s.off]) {
		return 0, &UnmarshalError{s.off, ErrNotDigit}
	}

	start := s.off
	s.off++

	var (
		decSepOff int
		t         = typeInteger
	)

	for s.off < len(s.data) {
		size := s.off - start
		if (t == typeInteger && (size >= 15)) || size >= 16 {
			return 0, &UnmarshalError{s.off, ErrNumberOutOfRange}
		}

		c := s.data[s.off]
		if isDigit(c) {
			s.off++

			continue
		}

		if t == typeInteger && c == '.' {
			if size > maxDigit {
				return 0, &UnmarshalError{s.off, ErrNumberOutOfRange}
			}

			t = typeDecimal
			decSepOff = s.off
			s.off++

			continue
		}

		break
	}

	str := s.data[start:s.off]

	if t == typeInteger {
		return parseInteger(str, neg, s.off)
	}

	return parseDecimal(s, decSepOff, str, neg)
}

func isNeg(s *scanner) bool {
	if s.data[s.off] == '-' {