/* wsetbuf.c - file for stdio.h *//* Copyright 1992 Wind River Systems, Inc. *//*modification history--------------------01b,20sep92,smb  documentation additions01a,29jul92,smb  taken from UCB stdio*//*DESCRIPTION * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Chris Torek. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE.INCLUDE FILE: stdio.h, stdlib.hSEE ALSO: American National Standard X3.159-1989NOMANUAL*/#include "vxWorks.h"#include "stdio.h"#include "stdlib.h"#include "private/stdioP.h"/******************************************************************************** __swsetup - ** Various output routines call wsetup to be sure it is safe to write,* because either _flags does not include __SWR, or _buf is NULL.* _wsetup returns 0 if OK to write, nonzero otherwise.** * INCLUDE: stdio.h ** RETURNS: * NOMANUAL*/int __swsetup    (    FAST FILE *fp    )    {    /* If we are not writing, we had better be reading and writing */    if ((fp->_flags & __SWR) == 0) 	{	if ((fp->_flags & __SRW) == 0)	    return (EOF);	if (fp->_flags & __SRD) 	    {	    /* clobber any ungetc data */	    if (HASUB(fp))		FREEUB(fp);	    fp->_flags &= ~(__SRD|__SEOF);	    fp->_r = 0;	    fp->_p = fp->_bf._base;	    }	fp->_flags |= __SWR;	}    /* Make a buffer if necessary, then set _w */    if (fp->_bf._base == NULL)	__smakebuf (fp);    if (fp->_flags & __SLBF) 	{	/*	 * It is line buffered, so make _lbfsize be -_bufsize	 * for the putc() macro.  We will change _lbfsize back	 * to 0 whenever we turn off __SWR.	 */	fp->_w = 0;	fp->_lbfsize = -fp->_bf._size;	}    else	fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size;    return (0);    }