naruse	2009-08-09 08:25:32 +0900 (Sun, 09 Aug 2009)

  New Revision: 24480

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=24480

  Log:
    New API Encoding#ascii_compatible?.
    * encoding.c (enc_ascii_compatible_p): added. [ruby-core:24793]
      (Init_Encoding): New API Encoding#ascii_compatible?.

  Modified files:
    trunk/ChangeLog
    trunk/encoding.c
    trunk/test/ruby/test_encoding.rb

Index: encoding.c
===================================================================
--- encoding.c	(revision 24479)
+++ encoding.c	(revision 24480)
@@ -377,6 +377,22 @@
     return ENC_DUMMY_P(enc_table.list[must_encoding(enc)].enc) ? Qtrue : Qfalse;
 }
 
+/*
+ * call-seq:
+ *   enc.ascii_compatible? => true or false
+ *
+ * Returns whether ASCII-compatible or not.
+ *
+ *   Encoding::UTF_8.ascii_compatible?     #=> true
+ *   Encoding::UTF_16BE.ascii_compatible?  #=> false
+ *
+ */
+static VALUE
+enc_ascii_compatible_p(VALUE enc)
+{
+    return rb_enc_asciicompat(enc_table.list[must_encoding(enc)].enc) ? Qtrue : Qfalse;
+}
+
 static const char *
 enc_alias_internal(const char *alias, int idx)
 {
@@ -1428,6 +1444,7 @@
     rb_define_method(rb_cEncoding, "name", enc_name, 0);
     rb_define_method(rb_cEncoding, "names", enc_names, 0);
     rb_define_method(rb_cEncoding, "dummy?", enc_dummy_p, 0);
+    rb_define_method(rb_cEncoding, "ascii_compatible?", enc_ascii_compatible_p, 0);
     rb_define_singleton_method(rb_cEncoding, "list", enc_list, 0);
     rb_define_singleton_method(rb_cEncoding, "name_list", rb_enc_name_list, 0);
     rb_define_singleton_method(rb_cEncoding, "aliases", rb_enc_aliases, 0);
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 24479)
+++ ChangeLog	(revision 24480)
@@ -1,3 +1,7 @@
+Sat Aug  8 17:03:21 2009  NARUSE, Yui  <naruse@r...>
+
+	* encoding.c (enc_ascii_compatible_p): added. [ruby-core:24793]
+	  (Init_Encoding): New API Encoding#ascii_compatible?.
 Sun Aug  9 07:25:07 2009  Nobuyoshi Nakada  <nobu@r...>
 
 	* ext/ripper/eventids2.c (token_to_eventid): added
Index: test/ruby/test_encoding.rb
===================================================================
--- test/ruby/test_encoding.rb	(revision 24479)
+++ test/ruby/test_encoding.rb	(revision 24480)
@@ -44,6 +44,13 @@
     assert_equal(false, Encoding::UTF_8.dummy?)
   end
 
+  def test_ascii_compatible_p
+    assert_equal(true, Encoding::ASCII_8BIT.ascii_compatible?)
+    assert_equal(true, Encoding::UTF_8.ascii_compatible?)
+    assert_equal(false, Encoding::UTF_16BE.ascii_compatible?)
+    assert_equal(false, Encoding::ISO_2022_JP.ascii_compatible?)
+  end
+
   def test_name_list
     assert_instance_of(Array, Encoding.name_list)
     Encoding.name_list.each do |x|

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