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Contents
#
# phys/units/unit.rb
#
# Copyright (c) 2001-2013 Masahiro Tanaka <masa16.tanaka@gmail.com>
#
# This program is free software.
# You can distribute/modify this program under the terms of
# the GNU General Public License version 3 or later.
module Phys
class Unit
# @visibility private
module Utils
module_function
def as_numeric(x)
case x
when Rational
if x.denominator==1
x.to_i
else
x
end
when Numeric
x
when Unit
x.to_numeric
else
raise "Not Numric or #{self.class}: #{x.inspect}"
end
end
def check_decimal(x)
while x%5==0
x/=5
end
while x%2==0
x/=2
end
x==1
end
def int_inspect(x)
if x.to_s.size > 5
"%g" % x.to_f
else
x.inspect
end
end
def n_trail_zero(x)
s = x.to_s
if /^([+-]?\d*[1-9])(0*)$/ =~ s
[$1.to_i, $2.size]
else
raise "cannot match with: '#{s}'"
end
end
def num_inspect(x)
if x.kind_of? Rational
d = x.denominator
n = x.numerator
if d==1
return int_inspect(n)
end
if check_decimal(d)
return x.to_f.inspect
end
if check_decimal(n)
if n==1
return "(1/"+int_inspect(d)+")"
else
return "(1/%s)" % Rational(d,n).to_f.inspect
end
end
ud,nd = n_trail_zero(d)
if nd > 3
return Rational(n,ud).inspect +
("*%.0e"%10**(-nd))
end
un,nn = n_trail_zero(n)
if nn > 3
return Rational(un,d).inspect +
("*%.0e"%10**(nn))
end
end
x.inspect
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems