Cleaned up the layout quite a bit to make Gemifying and including into Rails 3 less painful. Some steps to 1.9 compatibility

lib/net/ldap/core_ext/fixnum.rb

@@ -0,0 +1,52 @@
+module Net
+  class LDAP
+    module Extensions
+      module Fixnum
+        def to_ber
+          "\002" + to_ber_internal
+        end
+
+        def to_ber_enumerated
+          "\012" + to_ber_internal
+        end
+
+        def to_ber_length_encoding
+          if self <= 127
+            [self].pack('C')
+          else
+            i = [self].pack('N').sub(/^[\0]+/,"")
+            [0x80 + i.length].pack('C') + i
+          end
+        end
+
+        # Generate a BER-encoding for an application-defined INTEGER.
+        # Example: SNMP's Counter, Gauge, and TimeTick types.
+        #
+        def to_ber_application tag
+            [0x40 + tag].pack("C") + to_ber_internal
+        end
+
+        #--
+        # Called internally to BER-encode the length and content bytes of a Fixnum.
+        # The caller will prepend the tag byte.
+        def to_ber_internal
+          # PLEASE optimize this code path. It's awfully ugly and probably slow.
+          # It also doesn't understand negative numbers yet.
+          raise Net::BER::BerError.new( "range error in fixnum" ) unless self >= 0
+          z = [self].pack("N")
+          zlen = if self < 0x80
+      	1
+          elsif self < 0x8000
+      	2
+          elsif self < 0x800000
+      	3
+          else
+      	4
+          end
+          [zlen].pack("C") + z[0-zlen,zlen]
+        end
+        private :to_ber_internal
+      end
+    end
+  end
+end