miniinit.c: built-in encoding aliases

* miniinit.c (Init_enc): add some common aliases of built-in
  encodings.  [ruby-core:72481] [Bug #11872]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53315 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Dec 26 11:26:38 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* miniinit.c (Init_enc): add some common aliases of built-in
+	  encodings.  [ruby-core:72481] [Bug #11872]
+
 Sat Dec 26 01:24:40 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in, version.h (RUBY_PROGRAM_VERSION): extract version

miniinit.c

@@ -36,11 +36,14 @@ Init_enc_set_filesystem_encoding(void)
     return rb_enc_to_index(rb_default_external_encoding());
 }
 
+void rb_encdb_declare(const char *name);
+int rb_encdb_alias(const char *alias, const char *orig);
 void
 Init_enc(void)
 {
-    void rb_encdb_declare(const char *name);
     rb_encdb_declare("ASCII-8BIT");
     rb_encdb_declare("US-ASCII");
     rb_encdb_declare("UTF-8");
+    rb_encdb_alias("BINARY", "ASCII-8BIT");
+    rb_encdb_alias("ASCII", "US-ASCII");
 }