Module: LunarCalendar::Utils

Defined in:

lib/lunar_calendar/utils.rb

Overview

The calculate utils

Class Method Summary

• .decode(data, length, shift) ⇒ Number

  Extract packed informactio.

• .new_year_at(offset) ⇒ LunarCalendar::Solar

  Extract lunar new year in solar date.

Class Method Details

.decode(data, length, shift) ⇒ Number

Extract packed informactio

Parameters:

• data (Number) —

  packed data

• length (Number) —

  total bit to read

• shift (Number) —

  the shift position

Returns:

• (Number) —

  value

Since:

• 0.1.0

# File 'lib/lunar_calendar/utils.rb', line 17

def self.decode(data, length, shift)
  (data & (((1 << length) - 1) << shift)) >> shift
end

.new_year_at(offset) ⇒ LunarCalendar::Solar

Extract lunar new year in solar date

Parameters:

• offset (Number) —

  the offset of table

Returns:

• (LunarCalendar::Solar) —

  the solar date

Since:

• 0.1.0

# File 'lib/lunar_calendar/utils.rb', line 28

def self.new_year_at(offset)
  solar = LunarCalendar::Data::NEW_YEARS[offset]
  year = decode(solar, 12, 9)
  month = decode(solar, 4, 5)
  day = decode(solar, 5, 0)

  Solar.new(year, month, day)
end