Module: YaKansuji::Formatter::Simple

Defined in:
lib/ya_kansuji/formatter/simple.rb

Overview

Simple kansuji formatter

Constant Summary collapse

DIGITS = 
%w(一 二 三 四 五 六 七 八 九).freeze
UNITS = 
([''] + UNIT_EXP3).freeze

Class Method Summary collapse

Class Method Details

.call(num, _options = {}) ⇒ Object 



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# File 'lib/ya_kansuji/formatter/simple.rb', line 12

def call(num, _options = {})
  return '零' if num.zero?

  ret = nil
  chunks = Formatter.split_by_unit4(num)
  (chunks.size - 1).downto(0) do |idx4|
    i4 = chunks[idx4]
    next if i4.zero?

    ret ||= +''
    unit4 = Formatter::UNIT4_UNITS[idx4]
    if i4 == 1
      ret << '一' << unit4
      next
    end

    divisor = 1000
    3.downto(0) do |idx3|
      i3 = (i4 / divisor) % 10
      divisor /= 10
      next if i3.zero?

      unit3 = UNITS[idx3]
      if i3 == 1 && !unit3.empty?
        ret << unit3
      else
        ret << DIGITS[i3 - 1] << unit3
      end
    end
    ret << unit4
  end
  ret || ''
end