* ext/tcltklib/tcltklib.c(lib_fromUTF8_core): raise ArgumentError when

  the unknown encoding name is given.
* ext/tcltklib/tcltklib.c(lib_toUTF8_core): ditto.
* ext/tk/lib/tk.rb(Tk::Encoding.encoding_convertfrom): bug fix.
* ext/tk/lib/tk.rb(Tk::Encoding.encoding_convertto): ditto.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@6721 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 2 deletions

diff --git a/ext/tk/lib/tk.rb b/ext/tk/lib/tk.rb
index af9c63f72..e91ba92df 100644
--- a/ext/tk/lib/tk.rb
+++ b/ext/tk/lib/tk.rb
@@ -1943,12 +1943,19 @@ if (/^(8\.[1-9]|9\.|[1-9][0-9])/ =~ Tk::TCL_VERSION && !Tk::JAPANIZED_TK)
 	tk_call('encoding', 'system', enc)
       end
 
-      def encoding_convertfrom(str, enc=None)
+      def encoding_convertfrom(str, enc=nil)
+	# str must be a Tcl's internal string expression in enc. 
+	# the return value is a UTF-8 string.
+	enc = encoding_system unless enc
 	TkCore::INTERP.__invoke('encoding', 'convertfrom', enc, str)
       end
       alias encoding_convert_from encoding_convertfrom
 
-      def encoding_convertto(str, enc=None)
+      def encoding_convertto(str, enc=nil)
+	# str must be a UTF-8 string.
+	# The return value is a Tcl's internal string expression in enc. 
+        # To get an usual enc string, use Tk.fromUTF8(ret_val, enc).
+	enc = encoding_system unless enc
 	TkCore::INTERP.__invoke('encoding', 'convertto', enc, str)
       end
       alias encoding_convert_to encoding_convertto