/* wbuf.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.hSEE ALSO: American National Standard X3.159-1989NOMANUAL*/#include "vxWorks.h"#include "stdio.h"#include "private/stdioP.h"/******************************************************************************** __swbuf - * * Write the given character into the (probably full) buffer for* the given file.  Flush the buffer out if it is or becomes full,* or if c=='\n' and the file is line buffered.** INCLUDE: stdio.h ** RETURNS: * NOMANAUL*/int __swbuf    (    FAST int	c,    FAST FILE *	fp    )    {    FAST int    n;    /*     * In case we cannot write, or longjmp takes us out early,     * make sure _w is 0 (if fully- or un-buffered) or -_bf._size     * (if line buffered) so that we will get called again.     * If we did not do this, a sufficient number of putc()     * calls might wrap _w from negative to positive.     */    fp->_w = fp->_lbfsize;    if (cantwrite (fp))	return (EOF);    c = (uchar_t)c;    /*     * If it is completely full, flush it out.  Then, in any case,     * stuff c into the buffer.  If this causes the buffer to fill     * completely, or if c is '\n' and the file is line buffered,     * flush it (perhaps a second time).  The second flush will always     * happen on unbuffered streams, where _bf._size==1; fflush()     * guarantees that putc() will always call wbuf() by setting _w     * to 0, so we need not do anything else.     */    n = fp->_p - fp->_bf._base;    if (n >= fp->_bf._size) 	{	if (fflush (fp))	    return (EOF);	n = 0;	}    fp->_w--;    *fp->_p++ = c;    if ((++n == fp->_bf._size) || (fp->_flags & __SLBF && c == '\n'))	if (fflush (fp))		return (EOF);    return (c);    }