From 34fff376ffbbf8e1fcff501869f043003f88edd5 Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 20 Aug 2004 08:30:43 +0000
Subject: [PATCH] * 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 | 5 +++++
 io.c      | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index ca520dcbe2..1918cc2295 100644
--- a/ChangeLog
+++ b/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.
diff --git a/io.c b/io.c
index d64e41d683..45056040bb 100644
--- a/io.c
+++ b/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