* encoding.c (rb_enc_mbclen): make it never fail.

(rb_enc_nth): don't check the return value of rb_enc_mbclen.
  (rb_enc_strlen): ditto.
  (rb_enc_precise_mbclen): return needmore(1) if e <= p.
  (rb_enc_get_ascii): new function for extracting ASCII character.

* include/ruby/encoding.h (rb_enc_get_ascii): declared.

* include/ruby/regex.h (ismbchar): removed.

* re.c (rb_reg_expr_str): use rb_enc_get_ascii.
  (unescape_escaped_nonascii): use rb_enc_precise_mbclen to determine
  the termination of escaped non-ASCII character.
  (unescape_nonascii): use rb_enc_precise_mbclen.
  (rb_reg_quote): use rb_enc_get_ascii.
  (rb_reg_regsub): use rb_enc_get_ascii.

* string.c (rb_str_reverse) don't check the return value of
  rb_enc_mbclen.
  (rb_str_split_m): don't call rb_enc_mbclen with e <= p.

* parse.y (is_identchar): use ISASCII.
  (parser_ismbchar): removed.
  (parser_precise_mbclen): new macro.
  (parser_isascii): new macro.
  (parser_tokadd_mbchar): use parser_precise_mbclen to check invalid
  character precisely.
  (parser_tokadd_string): use parser_isascii.
  (parser_yylex): ditto.
  (is_special_global_name): don't call is_identchar with e <= p.
  (rb_enc_symname_p): ditto.

  [ruby-dev:32455]

* ext/tk/sample/tkextlib/vu/canvSticker2.rb: remove coding cookie
  because the encoding is not UTF-8.  [ruby-dev:32475]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14131 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

include/ruby/regex.h

@@ -29,7 +29,6 @@ extern "C" {
 
 ONIG_EXTERN OnigEncoding    OnigEncDefaultCharEncoding;
 
-#define ismbchar(p, e, enc) (mbclen((p),(e),(enc)) != 1)
 #define mbclen(p,e,enc)  rb_enc_mbclen((p),(e),(enc))
 
 #endif /* ifndef ONIG_RUBY_M17N */