Insert libio rewrite and its various changes from devo.

From-SVN: r15129

1 files changed, 49 insertions, 27 deletions

diff --git a/libio/iosetvbuf.c b/libio/iosetvbuf.c
index 1b2da4f..65eeea5 100644
--- a/libio/iosetvbuf.c
+++ b/libio/iosetvbuf.c
@@ -1,26 +1,27 @@
-/* 
-Copyright (C) 1993 Free Software Foundation
+/* Copyright (C) 1993, 1996, 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"
 
@@ -29,10 +30,16 @@ the executable file might be covered by the GNU General Public License. */
 #define _IONBF 2 /* No buffering. */
 
 int
-DEFUN(_IO_setvbuf, (fp, buf, mode, size),
-      _IO_FILE* fp AND char* buf AND int mode AND _IO_size_t size)
+_IO_setvbuf (fp, buf, mode, size)
+     _IO_FILE *fp;
+     char *buf;
+     int mode;
+     _IO_size_t size;
 {
-  CHECK_FILE(fp, EOF);
+  int result;
+  CHECK_FILE (fp, EOF);
+  _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
+  _IO_flockfile (fp);
   switch (mode)
     {
     case _IOFBF:
@@ -55,24 +62,39 @@ DEFUN(_IO_setvbuf, (fp, buf, mode, size),
 		 A possibly cleaner alternative would be to add an
 		 extra flag, but then flags are a finite resource.  */
 	      if (_IO_DOALLOCATE (fp) < 0)
-		return EOF;
+		{
+		  result = EOF;
+		  goto unlock_return;
+		}
 	      fp->_IO_file_flags &= ~_IO_LINE_BUF;
 	    }
-	  return 0;
+	  result = 0;
+	  goto unlock_return;
 	}
       break;
     case _IOLBF:
       fp->_IO_file_flags &= ~_IO_UNBUFFERED;
       fp->_IO_file_flags |= _IO_LINE_BUF;
       if (buf == NULL)
-	return 0;
+	{
+	  result = 0;
+	  goto unlock_return;
+	}
       break;
     case _IONBF:
       buf = NULL;
       size = 0;
       break;
     default:
-      return EOF;
+      result = EOF;
+      goto unlock_return;
     }
-  return _IO_SETBUF (fp, buf, size) == NULL ? EOF : 0;
+  result = _IO_SETBUF (fp, buf, size) == NULL ? EOF : 0;
+unlock_return:
+  _IO_cleanup_region_end (1);
+  return result;
 }
+
+#ifdef weak_alias
+weak_alias (_IO_setvbuf, setvbuf)
+#endif