usr/src/usr.bin/window/wwprintf.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)wwprintf.c  3.8 (Berkeley) %G%";
#endif /* not lint */

#include "ww.h"
#include <varargs.h>

/*VARARGS2*/
wwprintf(w, fmt, va_alist)
struct ww *w;
char *fmt;
va_dcl
{
#include <stdio.h>
        struct _iobuf _wwbuf;
        char buf[1024];
        va_list ap;

        /*
         * A danger is that when buf overflows, _flsbuf() will be
         * called automatically.  It doesn't check for _IOSTR.
         * We set the file descriptor to -1 so no actual io will be done.
         */
        _wwbuf._flag = _IOWRT+_IOSTRG;
        _wwbuf._base = _wwbuf._ptr = buf;
        _wwbuf._cnt = sizeof buf;
        _wwbuf._file = -1;                      /* safe */
        va_start(ap);
        _doprnt(fmt, ap, &_wwbuf);
        va_end(ap);
        (void) wwwrite(w, buf, _wwbuf._ptr - buf);
}