(xfont_has_char): The font has C if C is ASCII and the

encoding charset is ascii_compatible.

src/ChangeLog

+2009-04-14  Kenichi Handa  <handa@m17n.org>
+
+	* xfont.c (xfont_has_char): The font has C if C is ASCII and the
+	encoding charset is ascii_compatible.
+
+	* charset.c (Fdefine_charset_internal): Make charset
+	ascii-compatible if the method is CHARSET_METHOD_OFFSET, the
+	code_offset is 0, and covers all ASCII characters.
+
 2009-04-13  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* nsselect.m (symbol_to_nsstring, clean_local_selection_data)

src/xfont.c

@@ -798,10 +798,13 @@ xfont_has_char (entity, c)
      int c;
 {
   Lisp_Object registry = AREF (entity, FONT_REGISTRY_INDEX);
+  struct charset *encoding;
   struct charset *repertory;
 
-  if (font_registry_charsets (registry, NULL, &repertory) < 0)
+  if (font_registry_charsets (registry, &encoding, &repertory) < 0)
     return -1;
+  if (ASCII_CHAR_P (c) && encoding->ascii_compatible_p)
+    return 1;
   if (! repertory)
     return -1;
   return (ENCODE_CHAR (repertory, c) != CHARSET_INVALID_CODE (repertory));