Add functions and macros for second encoding definitions.

* encoding.c (rb_enc_set_base): Add for setting base encoding
  with their names. this is internal function.

* template/encdb.h.tmpl: specify ENC_SET_BASE for second
  encodings in each encoding files.

* enc/encdb.c (rb_enc_set_base): add a declaration.
  (ENC_SET_BASE): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24383 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/encoding.c b/encoding.c
index 5e54ce7218..49326b6625 100644
--- a/encoding.c
+++ b/encoding.c
@@ -275,6 +275,18 @@ set_base_encoding(int index, rb_encoding *base)
     return enc;
 }
 
+/* for encdb.h
+ * Set base encoding for encodings which are not replicas
+ * but not in their own files.
+ */
+void
+rb_enc_set_base(const char *name, const char *orig)
+{
+    int idx = rb_enc_registered(name);
+    int origidx = rb_enc_registered(orig);
+    set_base_encoding(idx, rb_enc_from_index(origidx));
+}
+
 int
 rb_enc_replicate(const char *name, rb_encoding *encoding)
 {