From 2a3528a051347ef336e89576e945dc789aab3771 Mon Sep 17 00:00:00 2001
From: knu <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 4 Oct 2007 18:56:32 +0000
Subject: * lib/ipaddr.rb (<=>): Implement IPAddr#<=> and make IPAddr  
 comparable.

* lib/ipaddr.rb (succ): Implement IPAddr#succ.  You can now create
  a range between two IPAddr's, which (Range) object is
  enumeratable.

* lib/ipaddr.rb (to_range): A new method to create a Range object
  for the (network) address.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13628 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/ipaddr.rb | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'lib/ipaddr.rb')

diff --git a/lib/ipaddr.rb b/lib/ipaddr.rb
index 336c5e1b21..56b906c805 100644
--- a/lib/ipaddr.rb
+++ b/lib/ipaddr.rb
@@ -312,6 +312,37 @@ class IPAddr
     return _reverse + ".ip6.int"
   end
 
+  # Returns the successor to the ipaddr.
+  def succ
+    return self.clone.set(@addr + 1, @family)
+  end
+
+  # Compares the ipaddr with another.
+  def <=>(other)
+    other = coerce_other(other)
+
+    return nil if other.family != @family
+
+    return @addr <=> other.to_i
+  end
+  include Comparable
+
+  # Creates a Range object for the network address.
+  def to_range
+    begin_addr = (@addr & @mask_addr)
+
+    case @family
+    when Socket::AF_INET
+      end_addr = (@addr | (IN4MASK ^ @mask_addr))
+    when Socket::AF_INET6
+      end_addr = (@addr | (IN6MASK ^ @mask_addr))
+    else
+      raise "unsupported address family"
+    end
+
+    return clone.set(begin_addr, @family)..clone.set(end_addr, @family)
+  end
+
   # Returns a string containing a human-readable representation of the
   # ipaddr. ("#<IPAddr: family:address/mask>")
   def inspect
-- 
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