* io.c (rb_io_each_codepoint): use cbuf when needs readconv.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26529 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Sun Jan 31 23:20:43 2010  wanabe  <s.wanabe@gmail.com>
+
+	* io.c (rb_io_each_codepoint): use cbuf when needs readconv.
+
 Sun Jan 31 23:07:23 2010  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* test/ruby/test_dir.rb: use string instead of symbol as file name.

io.c

@@ -2860,8 +2860,8 @@ rb_io_each_codepoint(VALUE io)
 	    c = rb_enc_codepoint(fptr->cbuf+fptr->cbuf_off,
 				 fptr->cbuf+fptr->cbuf_off+fptr->cbuf_len,
 				 fptr->encs.enc);
-	    fptr->rbuf_off += n;
-	    fptr->rbuf_len -= n;
+	    fptr->cbuf_off += n;
+	    fptr->cbuf_len -= n;
 	    rb_yield(UINT2NUM(c));
 	}
     }