encoding.c: revert r41964

* encoding.c (enc_set_index): since r41967, old terminator is dealt
  with in str_fill_term().  should not consider it here because this
  function is called before any encoding is set.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41994 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 10 deletions

diff --git a/encoding.c b/encoding.c
index 075c1abd65..7304a37877 100644
--- a/encoding.c
+++ b/encoding.c
@@ -752,14 +752,8 @@ rb_enc_get_index(VALUE obj)
 }
 
 static void
-enc_set_index(VALUE obj, int oldidx, int idx, rb_encoding *enc)
+enc_set_index(VALUE obj, int idx)
 {
-    int termlen = rb_enc_mbminlen(enc);
-    int oldtermlen = rb_enc_mbminlen(rb_enc_from_index(oldidx));
-
-    if (oldtermlen < termlen && RB_TYPE_P(obj, T_STRING)) {
-	rb_str_fill_terminator(obj, termlen);
-    }
     if (idx < ENCODING_INLINE_MAX) {
 	ENCODING_SET_INLINED(obj, idx);
 	return;
@@ -772,14 +766,15 @@ void
 rb_enc_set_index(VALUE obj, int idx)
 {
     rb_check_frozen(obj);
-    enc_set_index(obj, ENCODING_GET(obj), idx, must_encindex(idx));
+    must_encindex(idx);
+    enc_set_index(obj, idx);
 }
 
 VALUE
 rb_enc_associate_index(VALUE obj, int idx)
 {
     rb_encoding *enc;
-    int oldidx;
+    int oldidx, oldtermlen, termlen;
 
 /*    enc_check_capable(obj);*/
     rb_check_frozen(obj);
@@ -794,7 +789,12 @@ rb_enc_associate_index(VALUE obj, int idx)
 	!rb_enc_asciicompat(enc)) {
 	ENC_CODERANGE_CLEAR(obj);
     }
-    enc_set_index(obj, oldidx, idx, enc);
+    termlen = rb_enc_mbminlen(enc);
+    oldtermlen = rb_enc_mbminlen(rb_enc_from_index(oldidx));
+    if (oldtermlen < termlen && RB_TYPE_P(obj, T_STRING)) {
+	rb_str_fill_terminator(obj, termlen);
+    }
+    enc_set_index(obj, idx);
     return obj;
 }