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# coding: ASCII-8BIT
class ASN1Kit::Real < ASN1Kit::Type
asn1_tag :IMPLICIT, :UNIVERSAL, 9
asn1_alias "REAL"
PLUS_INFINITY = :plus_infinity
MINUS_INFINITY = :minus_infinity
NOT_A_NUMBER = :not_a_number
MINUS_ZERO = :minus_zero
SPECIAL_VALUES = Set[
PLUS_INFINITY, MINUS_INFINITY, NOT_A_NUMBER, MINUS_ZERO
]
private_constant :SPECIAL_VALUES
def initialize(value)
case value
when PLUS_INFINITY, MINUS_INFINITY, NOT_A_NUMBER, MINUS_ZERO
@value = value
when Integer
# TODO: Consider constraints
@value = { mantissa: value, base: 10, exponent: 0 }
when Float, Rational
raise NotImplementedError
else
# Assuming value is a { mantissa: M, base: B, exponent: E } value
@value = value
end
end
def cast_to(type)
return type.new(@value) if type <= ASN1Kit::Real
super
end
def plus_infinity?() @value == PLUS_INFINITY end
def minus_infinity?() @value == MINUS_INFINITY end
def not_a_number?() @value == NOT_A_NUMBER end
def minus_zero?() @value == MINUS_ZERO end
def raw_value() @value end
def ==(other)
other.is_a?(ASN1Kit::Real) && @value == other.raw_value
end
end
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