Function tryParseTimeString

bolt/type/TimestampConversion.cpp:394–498

String format is hh:mm:ss.microseconds (microseconds are optional). ISO 8601

// String format is hh:mm:ss.microseconds (microseconds are optional).
// ISO 8601
bool tryParseTimeString(
    const char* buf,
    size_t len,
    size_t& pos,
    int64_t& result,
    int32_t mode) {
  int32_t hour = -1, min = -1, sec = -1, micros = -1;
  pos = 0;

  if (len == 0) {
    return false;
  }

  // Skip leading spaces.
  while (pos < len && characterIsSpace(buf[pos])) {
    pos++;
  }

  if (pos >= len) {
    return false;
  }

  if (!characterIsDigit(buf[pos])) {
    return false;
  }

  if (!parseDoubleDigit(buf, len, pos, hour)) {
    return false;
  }
  if (hour < 0 || hour >= 24) {
    return false;
  }

  // No minute and second.
  if ((mode & ParseMode::kNonStandardCast) && pos == len) {
    result = fromTime(hour, 0, 0, 0);
    return true;
  }

  if (pos >= len) {
    return false;
  }

  // Fetch the separator.
  int sep = buf[pos++];
  if (sep != ':') {
    // Invalid separator.
    return false;
  }

  if (!parseDoubleDigit(buf, len, pos, min)) {
    return false;
  }
  if (min < 0 || min >= 60) {
    return false;
  }

  // No second.