Fix -e script encoding

* ruby.c (process_options): convert -e script to the encoding
  given by a command line option on Windows.  assume it is the
  expected encoding.  [ruby-dev:49461] [Bug #11900]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54785 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Tue Apr 26 23:35:23 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ruby.c (process_options): convert -e script to the encoding
+	  given by a command line option on Windows.  assume it is the
+	  expected encoding.  [ruby-dev:49461] [Bug #11900]
+
 Tue Apr 26 21:11:02 2016  Tanaka Akira  <akr@fsij.org>
 
 	* numeric.c (rb_int_lshift): {Fixnum,Bignum}#<< is unified into

ruby.c

@@ -1414,6 +1414,9 @@ process_options(int argc, char **argv, struct cmdline_options *opt)
     VALUE parser;
     const rb_iseq_t *iseq;
     rb_encoding *enc, *lenc;
+#if UTF8_PATH
+    rb_encoding *uenc, *ienc = 0;
+#endif
     const char *s;
     char fbuf[MAXPATHLEN];
     int i = (int)proc_options(argc, argv, opt, 0);
@@ -1525,6 +1528,9 @@ process_options(int argc, char **argv, struct cmdline_options *opt)
 	enc = rb_enc_from_index(opt->intern.enc.index);
 	rb_enc_set_default_internal(rb_enc_from_encoding(enc));
 	opt->intern.enc.index = -1;
+#if UTF8_PATH
+	ienc = enc;
+#endif
     }
     rb_enc_associate(opt->script_name, lenc);
     rb_obj_freeze(opt->script_name);
@@ -1559,8 +1565,11 @@ process_options(int argc, char **argv, struct cmdline_options *opt)
 #undef SET_COMPILE_OPTION
     }
 #if UTF8_PATH
-    opt->script_name = str_conv_enc(opt->script_name, rb_utf8_encoding(), lenc);
+    uenc = rb_utf8_encoding();
-    opt->script = RSTRING_PTR(opt->script_name);
+    if (uenc != lenc) {
+	opt->script_name = str_conv_enc(opt->script_name, uenc, lenc);
+	opt->script = RSTRING_PTR(opt->script_name);
+    }
 #endif
     ruby_set_argv(argc, argv);
     process_sflag(&opt->sflag);
@@ -1578,7 +1587,15 @@ process_options(int argc, char **argv, struct cmdline_options *opt)
 	}
 	else {
 	    eenc = lenc;
+#if UTF8_PATH
+	    if (ienc) eenc = ienc;
+#endif
 	}
+#if UTF8_PATH
+	if (eenc != uenc) {
+	    opt->e_script = str_conv_enc(opt->e_script, uenc, eenc);
+	}
+#endif
 	rb_enc_associate(opt->e_script, eenc);
 	if (!(opt->dump & ~DUMP_BIT(version_v))) {
 	    ruby_set_script_name(opt->script_name);

test/ruby/test_rubyoptions.rb

@@ -768,6 +768,34 @@ class TestRubyOptions < Test::Unit::TestCase
         assert_in_out_err(["-e", "puts ARGV", "*.txt"], "", ougai)
       end
     end
+
+    def assert_e_script_encoding(str, args = [])
+      cmds = [
+        EnvUtil::LANG_ENVS.inject({}) {|h, k| h[k] = ENV[k]; h},
+        *args,
+        '-e', "s = '#{str}'",
+        '-e', 'puts s.encoding.name',
+        '-e', 'puts s.dump',
+      ]
+      assert_in_out_err(cmds, "", [str.encoding.name, str.dump], [],
+                        "#{str.encoding}:#{str.dump} #{args.inspect}")
+    end
+
+    # tested codepages: 437 850 852 855 932 65001
+    # Since the codepage is shared all processes per conhost.exe, do
+    # not chcp, or parallel test may break.
+    def test_locale_codepage
+      locale = Encoding.find("locale")
+      list = %W"\u{c7} \u{452} \u{3066 3059 3068}"
+      list.each do |s|
+        assert_e_script_encoding(s, %w[-U])
+      end
+      list.each do |s|
+        s = s.encode(locale) rescue next
+        assert_e_script_encoding(s)
+        assert_e_script_encoding(s, %W[-E#{locale.name}])
+      end
+    end
   when /cygwin/
     def test_command_line_non_ascii
       assert_separately([{"LC_ALL"=>"ja_JP.SJIS"}, "-", "\u{3042}".encode("SJIS")], <<-"end;")