* lib/rss: rss library imported. [ruby-dev:22726]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5566 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rss/rexmlparser.rb

@@ -0,0 +1,43 @@
+require "rexml/document"
+require "rexml/streamlistener"
+
+/\A(\d+)\.(\d+).\d+\z/ =~ REXML::Version
+if $1.to_i < 2 or ($1.to_i == 2 and $2.to_i < 5)
+	raise LoadError
+end
+
+module RSS
+	
+	class Parser < BaseParser
+
+		private
+		def _parse
+			begin
+				REXML::Document.parse_stream(@rss, @listener)
+			rescue RuntimeError => e
+				raise NotWellFormedError.new{e.message}
+			rescue REXML::ParseException => e
+				context = e.context
+				line = context[0] if context
+				raise NotWellFormedError.new(line){e.message}
+			end
+		end
+		
+	end
+	
+	class Listener < BaseListener
+
+		include REXML::StreamListener
+		include ListenerMixin
+		
+
+		def xmldecl(version, encoding, standalone)
+			super
+			# Encoding is converted to UTF-8 when REXML parse XML.
+			@encoding = 'UTF-8'
+		end
+
+		alias_method(:cdata, :text)
+	end
+
+end