* lib/rational.rb (floor, ceil, truncate, round): do not use

definitions of Numeric.

	* lib/rational.rb (to_i): should returns truncated self.

	* lib/complex.rb (numerator): requires
	  Integer#{numerator,denominator}.

	* lib/complex.rb (quo): do not use definition of Numeric.

	* lib/complex.rb (>, >=, <, <=, between?, div, divmod, modulo,
	  floor, ceil, truncate, round): undef'ed.

	* lib/mathn.rb (Rational#inspect): removed.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15446 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,20 @@
+Tue Feb 12 20:32:50 2008  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* lib/rational.rb (floor, ceil, truncate, round): do not use
+	  definitions of Numeric.
+
+	* lib/rational.rb (to_i): should returns truncated self.
+
+	* lib/complex.rb (numerator): requires
+	  Integer#{numerator,denominator}.
+
+	* lib/complex.rb (quo): do not use definition of Numeric.
+
+	* lib/complex.rb (>, >=, <, <=, between?, div, divmod, modulo,
+	  floor, ceil, truncate, round): undef'ed.
+
+	* lib/mathn.rb (Rational#inspect): removed.
+
 Tue Feb 12 16:48:10 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* parse.y (args, mrhs): flattens literal array splats.

lib/complex.rb

@@ -104,6 +104,10 @@ class Complex < Numeric
   @RCS_ID='-$Id: complex.rb,v 1.3 1998/07/08 10:05:28 keiju Exp keiju $-'
 
   undef step
+  undef <, <=, <=>, >, >=
+  undef between?
+  undef div, divmod, modulo
+  undef floor, truncate, ceil, round
 
   def scalar?
     false
@@ -200,6 +204,10 @@ class Complex < Numeric
     end
   end
 
+  def quo(other)
+    Complex(@real.quo(1), @image.quo(1)) / other
+  end
+  
   #
   # Raise this complex number to the given (real or complex) power.
   #
@@ -248,6 +256,8 @@ class Complex < Numeric
   #
   # Remainder after division by a real or complex number.
   #
+
+=begin
   def % (other)
     if other.kind_of?(Complex)
       Complex(@real % other.real, @image % other.image)
@@ -258,6 +268,7 @@ class Complex < Numeric
       x % y
     end
   end
+=end
 
 #--
 #    def divmod(other)
@@ -312,8 +323,6 @@ class Complex < Numeric
   end
   alias conj conjugate
 
-  undef <=>
-  
   #
   # Test for numerical equality (<tt>a == a + 0<i>i</i></tt>).
   #
@@ -410,8 +419,34 @@ class Complex < Numeric
   
 end
 
+class Integer
 
+  unless defined?(1.numerator)
+    def numerator() self end
+    def denominator() 1 end
 
+    def gcd(other)
+      min = self.abs
+      max = other.abs
+      while min > 0
+        tmp = min
+        min = max % min
+        max = tmp
+      end
+      max
+    end
+
+    def lcm(other)
+      if self.zero? or other.zero?
+        0
+      else
+        (self.div(self.gcd(other)) * other).abs
+      end
+    end
+
+  end
+
+end
 
 module Math
   alias sqrt! sqrt

lib/mathn.rb

@@ -121,11 +121,6 @@ end
 class Rational
   Unify = true
 
-  remove_method :inspect
-  def inspect
-    format "%s/%s", numerator.inspect, denominator.inspect
-  end
-
   alias power! **
 
   def ** (other)

lib/rational.rb

@@ -238,6 +238,10 @@ class Rational < Numeric
     end
   end
 
+  def div(other)
+    (self / other).floor
+  end
+
   #
   # Returns the remainder when this value is divided by +other+.
   #
@@ -249,7 +253,7 @@ class Rational < Numeric
   #   r % 0.26             # -> 0.19
   #
   def % (other)
-    value = (self / other).to_i
+    value = (self / other).floor
     return self - other * value
   end
 
@@ -261,7 +265,7 @@ class Rational < Numeric
   #   r.divmod Rational(1,2)   # -> [3, Rational(1,4)]
   #
   def divmod(other)
-    value = (self / other).to_i
+    value = (self / other).floor
     return value, self - other * value
   end
 
@@ -270,7 +274,7 @@ class Rational < Numeric
   #
   def abs
     if @numerator > 0
-      Rational.new!(@numerator, @denominator)
+      self
     else
       Rational.new!(-@numerator, @denominator)
     end
@@ -345,8 +349,35 @@ class Rational < Numeric
   #   Rational(-7,4) == -1.75                 # -> true
   #   Rational(-7,4).to_i == (-1.75).to_i     # false
   #
-  def to_i
+
-    Integer(@numerator.div(@denominator))
+  def floor()
+    @numerator.div(@denominator)
+  end
+
+  def ceil()
+    -((-@numerator).div(@denominator))
+  end
+
+  def truncate()
+    if @numerator < 0
+      return -((-@numerator).div(@denominator))
+    end
+    @numerator.div(@denominator)
+  end
+
+  alias_method :to_i, :truncate
+
+  def round()
+    if @numerator < 0
+      num = -@numerator
+      num = num * 2 + @denominator
+      den = @denominator * 2
+      -(num.div(den))
+    else
+      num = @numerator * 2 + @denominator
+      den = @denominator * 2
+      num.div(den)
+    end
   end
 
   #
@@ -476,8 +507,9 @@ end
 
 class Fixnum
   alias quof quo
-  undef quo
+  remove_method :quo
-  # If Rational is defined, returns a Rational number instead of a Fixnum.
+
+  # If Rational is defined, returns a Rational number instead of a Float.
   def quo(other)
     Rational.new!(self, 1) / other
   end
@@ -491,21 +523,13 @@ class Fixnum
       Rational.new!(self, 1)**other
     end
   end
-
-  unless defined? 1.power!
-    alias power! **
-    alias ** rpower
-  end
 end
 
 class Bignum
-  unless defined? Complex
-    alias power! **
-  end
-
   alias quof quo
-  undef quo
+  remove_method :quo
-  # If Rational is defined, returns a Rational number instead of a Bignum.
+
+  # If Rational is defined, returns a Rational number instead of a Float.
   def quo(other)
     Rational.new!(self, 1) / other
   end
@@ -519,8 +543,15 @@ class Bignum
       Rational.new!(self, 1)**other
     end
   end
+end
 
-  unless defined? Complex
+unless defined? 1.power!
+  class Fixnum
+    alias power! **
+    alias ** rpower
+  end
+  class Bignum
+    alias power! **
     alias ** rpower
   end
 end