CSV::Parser#parse_quotable_loose

# File tmp/rubies/ruby-3.2.0/lib/csv/parser.rb, line 961
def parse_quotable_loose(&block)
  @scanner.keep_start
  @scanner.each_line(@row_separator) do |line|
    if @skip_lines and skip_line?(line)
      @scanner.keep_drop
      @scanner.keep_start
      next
    end
    original_line = line
    line = line.delete_suffix(@row_separator)

    if line.empty?
      if @skip_blanks
        @scanner.keep_drop
        @scanner.keep_start
        next
      end
      row = []
      quoted_fields = []
    elsif line.include?(@cr) or line.include?(@lf)
      @scanner.keep_back
      @need_robust_parsing = true
      return parse_quotable_robust(&block)
    else
      row = line.split(@split_column_separator, -1)
      quoted_fields = []
      n_columns = row.size
      i = 0
      while i < n_columns
        column = row[i]
        if column.empty?
          quoted_fields << false
          row[i] = nil
        else
          n_quotes = column.count(@quote_character)
          if n_quotes.zero?
            quoted_fields << false
            # no quote
          elsif n_quotes == 2 and
               column.start_with?(@quote_character) and
               column.end_with?(@quote_character)
            quoted_fields << true
            row[i] = column[1..-2]
          else
            @scanner.keep_back
            @need_robust_parsing = true
            return parse_quotable_robust(&block)
          end
          validate_field_size(row[i])
        end
        i += 1
      end
    end
    @scanner.keep_drop
    @scanner.keep_start
    @last_line = original_line
    emit_row(row, quoted_fields, &block)
  end
  @scanner.keep_drop
end