Insert libio rewrite and its various changes from devo.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@15129 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 34 insertions, 23 deletions

diff --git a/libio/iofread.c b/libio/iofread.c
index 8516cf30c14..c83d2b638c9 100644
--- a/libio/iofread.c
+++ b/libio/iofread.c
@@ -1,38 +1,49 @@
-/* 
-Copyright (C) 1993 Free Software Foundation
+/* Copyright (C) 1993, 1995, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU IO Library.
 
-This file is part of the GNU IO Library.  This library is free
-software; you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option)
-any later version.
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
 
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+   This library is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
 
-You should have received a copy of the GNU General Public License
-along with this library; see the file COPYING.  If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+   You should have received a copy of the GNU General Public License
+   along with this library; see the file COPYING.  If not, write to
+   the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.
 
-As a special exception, if you link this library with files
-compiled with a GNU compiler to produce an executable, this does not cause
-the resulting executable to be covered by the GNU General Public License.
-This exception does not however invalidate any other reasons why
-the executable file might be covered by the GNU General Public License. */
+   As a special exception, if you link this library with files
+   compiled with a GNU compiler to produce an executable, this does
+   not cause the resulting executable to be covered by the GNU General
+   Public License.  This exception does not however invalidate any
+   other reasons why the executable file might be covered by the GNU
+   General Public License.  */
 
 #include "libioP.h"
 
 _IO_size_t
-DEFUN(_IO_fread, (buf, size, count, fp),
-      void *buf AND _IO_size_t size AND _IO_size_t count AND _IO_FILE* fp)
+_IO_fread (buf, size, count, fp)
+     void *buf;
+     _IO_size_t size;
+     _IO_size_t count;
+     _IO_FILE *fp;
 {
   _IO_size_t bytes_requested = size*count;
   _IO_size_t bytes_read;
-  CHECK_FILE(fp, 0);
+  CHECK_FILE (fp, 0);
   if (bytes_requested == 0)
     return 0;
-  bytes_read = _IO_sgetn(fp, (char *)buf, bytes_requested);
+  _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
+  _IO_flockfile (fp);
+  bytes_read = _IO_sgetn (fp, (char *) buf, bytes_requested);
+  _IO_cleanup_region_end (1);
   return bytes_requested == bytes_read ? count : bytes_read / size;
 }
+
+#ifdef weak_alias
+weak_alias (_IO_fread, fread)
+#endif