nobu	2013-09-21 00:47:46 +0900 (Sat, 21 Sep 2013)

  New Revision: 42998

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=42998

  Log:
    string.c: scan coderange
    
    * string.c (rb_str_conv_enc_opts): make sure to scan coderange to get
      rid of unnecessary conversion.

  Modified files:
    trunk/ChangeLog
    trunk/string.c
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 42997)
+++ ChangeLog	(revision 42998)
@@ -1,3 +1,8 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Sat Sep 21 00:47:44 2013  Nobuyoshi Nakada  <nobu@r...>
+
+	* string.c (rb_str_conv_enc_opts): make sure to scan coderange to get
+	  rid of unnecessary conversion.
+
 Sat Sep 21 00:21:08 2013  Zachary Scott  <e@z...>
 
 	* ext/openssl/lib/openssl/ssl.rb: [DOC] Document OpenSSL::SSLServer
Index: string.c
===================================================================
--- string.c	(revision 42997)
+++ string.c	(revision 42998)
@@ -554,7 +554,7 @@ rb_str_conv_enc_opts(VALUE str, rb_encod https://github.com/ruby/ruby/blob/trunk/string.c#L554
     if (!to) return str;
     if (!from) from = rb_enc_get(str);
     if (from == to) return str;
-    if ((rb_enc_asciicompat(to) && ENC_CODERANGE(str) == ENC_CODERANGE_7BIT) ||
+    if ((rb_enc_asciicompat(to) && is_ascii_string(str)) ||
 	to == rb_ascii8bit_encoding()) {
 	if (STR_ENC_GET(str) != to) {
 	    str = rb_str_dup(str);

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