* io.c (rb_io_check_writable): no need to check read buffer if

already changed to write mode.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6801 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Fri Aug 20 14:49:42 2004  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* io.c (rb_io_check_writable): no need to check read buffer if
+	  already changed to write mode.
+
 Fri Aug 20 11:46:43 2004  UENO Katsuhiro  <katsu@blue.sky.or.jp>
 
 	* ext/zlib/zlib.c: GzipReader#ungetc caused crc error.

io.c

@@ -254,7 +254,7 @@ rb_io_check_writable(fptr)
     if (!(fptr->mode & FMODE_WRITABLE)) {
 	rb_raise(rb_eIOError, "not opened for writing");
     }
-    if (READ_DATA_BUFFERED(fptr->f)) {
+    if ((fptr->mode & FMODE_RBUF) && READ_DATA_BUFFERED(fptr->f)) {
 	rb_warn("read buffer data lost");
     }
 #if NEED_IO_SEEK_BETWEEN_RW