Initial revision

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3925 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rexml/encoding.rb

@@ -0,0 +1,62 @@
+module REXML
+	module Encoding
+		@@uconv_available = false
+
+		ENCODING_CLAIMS = { }
+
+		def Encoding.claim( encoding_str, match=nil )
+			if match
+				ENCODING_CLAIMS[ match ] = encoding_str
+			else
+				ENCODING_CLAIMS[ /^\s*<?xml\s*version=(['"]).*?\1\s*encoding=(["'])#{encoding_str}\2/ ] = encoding_str
+			end
+		end
+
+		# Native, default format is UTF-8, so it is declared here rather than in
+		# an encodings/ definition.
+		UTF_8 = 'UTF-8'
+		claim( UTF_8 )
+
+		# ID ---> Encoding name
+		attr_reader :encoding
+		def encoding=( enc )
+			enc = UTF_8 unless enc
+			@encoding = enc.upcase
+			require "rexml/encodings/#@encoding" unless @encoding == UTF_8
+		end
+
+		def check_encoding str
+			rv = ENCODING_CLAIMS.find{|k,v| str =~ k }
+			# Raise an exception if there is a declared encoding and we don't
+			# recognize it
+			unless rv
+				if str =~ /^\s*<?xml\s*version=(['"]).*?\1\s*encoding=(["'])(.*?)\2/
+					raise "A matching encoding handler was not found for encoding '#{$3}', or the encoding handler failed to load due to a missing support library (such as uconv)."
+				else
+					return UTF_8
+				end
+			end
+			return rv[1]
+		end
+
+		def to_utf_8(str)
+			return str
+		end
+
+		def from_utf_8 content
+			return content
+		end
+	end
+
+	module Encodingses
+		encodings = []
+		$:.each do |incl_dir|
+			if Dir[ File.join(incl_dir, 'rexml', 'encodings') ].size > 0
+				encodings |= Dir[ File.join(incl_dir, 'rexml', 'encodings', '*_decl.rb') ]
+			end
+			encodings.collect!{ |f| File.basename(f) }
+			encodings.uniq!
+		end
+		encodings.each { |enc| require "rexml/encodings/#{enc}" }
+	end
+end