Module: BLS::FQP

Included in:
Fp12, Fp2, Fp6
Defined in:
lib/bls/field.rb

Overview

Module for a field over polynomial. TT - ThisType, CT - ChildType, TTT - Tuple Type

Instance Method Summary collapse

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/bls/field.rb', line 124

def ==(other)
  coeffs == other.coeffs
end

#add(other) ⇒ Object Also known as: + 



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# File 'lib/bls/field.rb', line 132

def add(other)
  self.class.new(coeffs.map.with_index { |v, i| v + other.coeffs[i] })
end

#conjugate ⇒ Object 



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# File 'lib/bls/field.rb', line 168

def conjugate
  self.class.new([coeffs[0], coeffs[1].negate])
end

#div(other) ⇒ Object Also known as: / 



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# File 'lib/bls/field.rb', line 142

def div(other)
  inv = other.is_a?(Integer) ? Fp.new(other).invert.value : other.invert
  multiply(inv)
end

#negate ⇒ Object 



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# File 'lib/bls/field.rb', line 148

def negate
  self.class.new(coeffs.map(&:negate))
end

#pow(n) ⇒ Object Also known as: ** 



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# File 'lib/bls/field.rb', line 152

def pow(n)
  one = self.class.const_get(:ONE)
  return one if n.zero?
  return self if n == 1

  p = one
  d = self
  while n.positive?
    p *= d unless (n & 1).zero?
    n >>= 1
    d = d.square
  end
  p
end

#subtract(other) ⇒ Object Also known as: - 



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# File 'lib/bls/field.rb', line 137

def subtract(other)
  self.class.new(coeffs.map.with_index { |v, i| v - other.coeffs[i] })
end

#to_bytes ⇒ String

Convert to byte string.

Returns:

  • (String) 


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# File 'lib/bls/field.rb', line 174

def to_bytes
  [to_hex].pack('H*')
end

#to_hex ⇒ String

Convert to hex string.

Returns:

  • (String) 


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# File 'lib/bls/field.rb', line 180

def to_hex
  coeffs.map(&:to_hex).join
end

#zero? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bls/field.rb', line 128

def zero?
  coeffs.find { |c| !c.zero? }.nil?
end