tcltklib.c: basename

* ext/tk/tcltklib.c (setup_rubytkkit): use ruby_enc_find_basename
  if available, instead of File.basename.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52417 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/tk/extconf.rb

@@ -1795,7 +1795,9 @@ def pthread_check()
 
 %w"ruby_native_thread_p rb_errinfo rb_safe_level rb_hash_lookup
  rb_proc_new rb_obj_untrust rb_obj_taint rb_set_safe_level_force
- rb_sourcefile rb_thread_alive_p rb_thread_check_trap_pending".each do |func|
+ rb_sourcefile rb_thread_alive_p rb_thread_check_trap_pending
+ ruby_enc_find_basename
+".each do |func|
   have_func(func, "ruby.h")
   print(".") # progress
 end

ext/tk/tcltklib.c

@@ -1263,11 +1263,17 @@ setup_rubytkkit(void)
 #ifdef __WIN32__
     /* rbtk_win32_SetHINSTANCE("tcltklib.so"); */
     {
+# ifdef HAVE_RUBY_ENC_FIND_BASENAME
+      const char *base = ruby_enc_find_basename(rb_sourcefile(), NULL, NULL,
+						rb_filesystem_encoding());
+      rbtk_win32_SetHINSTANCE(base);
+# else
       VALUE basename;
       basename = rb_funcall(rb_cFile, rb_intern("basename"), 1,
 			    rb_str_new2(rb_sourcefile()));
       rbtk_win32_SetHINSTANCE(RSTRING_PTR(basename));
       RB_GC_GUARD(basename);
+# endif
     }
 #endif
     set_rubytk_kitpath(rb_sourcefile());