1 files changed, 53 insertions, 22 deletions
diff --git a/lib/rational.rb b/lib/rational.rb
index 1adac61e83..59588528ab 100644
--- a/lib/rational.rb
+++ b/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
 
   #
@@ -476,10 +507,11 @@ end
 
 class Fixnum
   alias quof quo
-  undef quo
-  # If Rational is defined, returns a Rational number instead of a Fixnum.
+  remove_method :quo
+
+  # If Rational is defined, returns a Rational number instead of a Float.
   def quo(other)
-    Rational.new!(self,1) / other
+    Rational.new!(self, 1) / other
   end
   alias rdiv quo
 
@@ -488,26 +520,18 @@ class Fixnum
     if other >= 0
       self.power!(other)
     else
-      Rational.new!(self,1)**other
+      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
-  # If Rational is defined, returns a Rational number instead of a Bignum.
+  remove_method :quo
+
+  # If Rational is defined, returns a Rational number instead of a Float.
   def quo(other)
-    Rational.new!(self,1) / other
+    Rational.new!(self, 1) / other
   end
   alias rdiv quo
 
@@ -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