Method Format

be/src/runtime/date-parse-util.cc:149–232

}

string DateParser::Format(const DateTimeFormatContext& dt_ctx, const DateValue& date) {
  DCHECK(dt_ctx.toks.size() > 0);
  DCHECK(dt_ctx.has_date_toks && !dt_ctx.has_time_toks);

  int year, month, day;
  if (!date.ToYearMonthDay(&year, &month, &day)) return "";

  DCHECK(date.IsValid());
  string result;
  result.reserve(dt_ctx.fmt_out_len);
  for (const DateTimeFormatToken& tok: dt_ctx.toks) {
    int32_t num_val = -1;
    switch (tok.type) {
      case YEAR:
      case ROUND_YEAR: {
        num_val = AdjustYearToLength(year, tok.divisor);
        break;
      }
      case QUARTER_OF_YEAR: {
        num_val = GetQuarter(month);
        break;
      }
      case MONTH_IN_YEAR: num_val = month; break;
      case MONTH_NAME:
      case MONTH_NAME_SHORT: {
        result.append(FormatMonthName(month, tok));
        break;
      }
      case WEEK_OF_YEAR: {
        num_val = GetWeekOfYear(year, month, day);
        break;
      }
      case WEEK_OF_MONTH: {
        num_val = GetWeekOfMonth(day);
        break;
      }
      case DAY_OF_WEEK: {
        num_val = GetDayOfWeek(date);
        break;
      }
      case DAY_IN_MONTH: num_val = day; break;
      case DAY_IN_YEAR: {
        num_val = GetDayInYear(year, month, day);
        break;
      }
      case DAY_NAME:
      case DAY_NAME_SHORT: {
        result.append(FormatDayName(GetDayOfWeek(date), tok));
        break;
      }
      case SEPARATOR: {
        result.append(tok.val, tok.len);
        break;
      }
      case TEXT: {
        result.append(FormatTextToken(tok));
        break;
      }