FMT_CONSTEXPR unsigned parse_nonnegative_int()

in src/main/cpp/sdk/common/spdlog/fmt/bundled/format.h [1454:1477]

• 22 lines of code
• 10 McCabe index (conditional complexity)

FMT_CONSTEXPR unsigned parse_nonnegative_int(
    const Char *&begin, const Char *end, ErrorHandler &&eh) {
  assert(begin != end && '0' <= *begin && *begin <= '9');
  if (*begin == '0') {
    ++begin;
    return 0;
  }
  unsigned value = 0;
  // Convert to unsigned to prevent a warning.
  unsigned max_int = (std::numeric_limits<int>::max)();
  unsigned big = max_int / 10;
  do {
    // Check for overflow.
    if (value > big) {
      value = max_int + 1;
      break;
    }
    value = value * 10 + unsigned(*begin - '0');
    ++begin;
  } while (begin != end && '0' <= *begin && *begin <= '9');
  if (value > max_int)
    eh.on_error("number is too big");
  return value;
}