Class: Numeric

Inherits:
Object show all
Defined in:
lib/rdoba/bcd.rb,
lib/rdoba/roman.rb,
lib/rdoba/numeric.rb

Constant Summary collapse

Roman = 
{ 1 => 'I', 4 => 'IV', 5 => 'V', 9 => 'IX', 10 => 'X', 40 => 'XL', 50 => 'L',
90 => 'XC', 100 => 'C', 400 => 'CD', 500 => 'D', 900 => 'CM', 1000 => 'M' }
Romani = 
Roman.keys.sort

Instance Method Summary collapse

Instance Method Details

#to_bcd ⇒ Object 



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# File 'lib/rdoba/bcd.rb', line 58

def to_bcd
# NOTE: return as plain LSB string
BCD.parse value; end

#to_p(*opts) ⇒ Object 



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# File 'lib/rdoba/numeric.rb', line 53

def to_p(*opts)
  v = parse_opts(opts)

  value = self
  minus = if value < 0
      value = -value
      true
    end
  res = ''
  while value != 0
    value, rem = value.divmod(256)
    res += rem.chr
  end

  pad_char = if minus
      negres += ''
      over = 1
      res.each_byte do |byte|
        negbyte = 255 - byte + over
        negres += if negbyte > 255
            over = 1
            0
          else
            over = 0
            negbyte
          end
      end
      res = negres
      "\xFF"
    else
      "\0"
    end

  res += pad_char * (v[:padding].to_i - res.size) if res.size < v[:padding].to_i

  plain = (v[:be] ? res.reverse(String::ByteByByte) : res).to_p
  plain
end

#to_rom ⇒ Object 



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# File 'lib/rdoba/roman.rb', line 8

def to_rom
  res = ''
  num = self
  i = Romani.size - 1

  while num > 0
    if num >= Romani[i]
      res << Roman[Romani[i]]
      num -= Romani[i]
    else
      i -= 1
    end
  end
  res
end