Sha256: 9fd4a59c7504305a1dd4dda93acdc218ede71fc347c4c229ddc0f44a76cffa31
Contents?: true
Size: 1.04 KB
Versions: 25
Compression:
Stored size: 1.04 KB
Contents
module Etherlite::Types
class Fixed < Base
def initialize(_signed, _size_m, _size_n)
unless 0 < (_size_m + _size_n) && (_size_m + _size_n) <= 256 &&
_size_m % 8 == 0 && _size_n % 8 == 0
raise ArgumentError, "invalid fixed size #{_size_m}x#{_size_n}"
end
@signed = _signed
@size_m = _size_m
@size_n = _size_n
end
def size
32
end
def signature
"#{@signed ? 'fixed' : 'ufixed'}#{@size_m}x#{@size_n}"
end
def encode(_value)
raise ArgumentError, "expected a number for #{signature}" unless _value.is_a? Numeric
raise ArgumentError, "expected a positive number for #{signature}" if !@signed && _value < 0
norm_value = (_value * (2**@size_n)).floor
raise ArgumentError, "value out of bounds #{_value}" if norm_value.abs > maximum
@signed ? Etherlite::Utils.int_to_hex(norm_value) : Etherlite::Utils.uint_to_hex(norm_value)
end
private
def maximum
2**(@signed ? (@size_m + @size_n) - 1 : (@size_m + @size_n))
end
end
end
Version data entries
25 entries across 25 versions & 1 rubygems