Class: Hijri::Absolute

Inherits:
Object
  • Object
show all
Defined in:
lib/hijri/absolute.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(abs) ⇒ Absolute

Returns a new instance of Absolute.



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# File 'lib/hijri/absolute.rb', line 5

def initialize abs
  self.absolute = abs
end

Instance Attribute Details

#absolute ⇒ Object

Returns the value of attribute absolute.



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# File 'lib/hijri/absolute.rb', line 3

def absolute
  @absolute
end

Instance Method Details

#gregorian2absolute(day, month, year) ⇒ Object

def greo_to_hijri(date)

hijri = absolute2islamic(gregorian2absolute(date.day, date.month, date.year))
Hijri.new hijri[0], hijri[1], hijri[2]

end

def hijri_to_greo(date)

greo = absolute2gregorian(islamic2absolute(date.day,date.month,date.year))
Date.new greo[0], greo[1], greo[2]

end



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# File 'lib/hijri/absolute.rb', line 19

def gregorian2absolute(day, month, year)
    #   # Computes the absolute date from the Gregorian date.
 @d = day
  @m = month - 1
  @m.downto(1) do |m|
    @d += last_day_of_gregorian_month(@m, year)
  end
  return (@d + 365 * (year - 1) + (year -1) / 4.0 - (year - 1) / 100.0 + (year - 1) / 400.0).to_i
end

#to_greo ⇒ Object 



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# File 'lib/hijri/absolute.rb', line 29

def to_greo
  # Computes the Gregorian date from the absolute date.
  # Search forward year by year from approximate year
  puts self.absolute
  year = (self.absolute / 366.0 + 0.5).to_i
  while (self.absolute >= gregorian2absolute(1, 1, year + 1))
    year += 1
  end
  # Search forward month by month from January
  month = 1
  while (self.absolute > gregorian2absolute(last_day_of_gregorian_month(month, year), month, year))
    month += 1
  end
  day = self.absolute - gregorian2absolute(1, month, year) + 1
  return [year, month, day]
end

#to_hijri ⇒ Object

TODO



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# File 'lib/hijri/absolute.rb', line 47

def to_hijri
  # Computes the Islamic date from the absolute date.
  # puts "abs #{abs} and islamicEpoch #{IslamicEpoch}"
  if (absolute <= Hijri::ISLAMIC_EPOCH)
    # Date is pre-Islamic
    month = 0
    day = 0
    year = 0
  elsif
    # Search forward year by year from approximate year
    year = ((absolute - Hijri::ISLAMIC_EPOCH) / 355.0).to_i
    while (absolute >= islamic2absolute(1,1,year+1))  
      year += 1
    end
      # Search forward month by month from Muharram
    month = 1
    while (absolute > islamic2absolute(last_day_of_islamic_month(month,year), month, year))
      month += 1
    end
    day = absolute - islamic2absolute(1, month, year) + 1
  end
  return [year, month, day]
end