xref: /illumos-gate/usr/src/lib/libcurses/screen/vwprintw.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1988 AT&T	*/
/*	  All Rights Reserved	*/

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*LINTLIBRARY*/

/*
 * printw and friends
 *
 */

#include	<sys/types.h>
#include	<stdlib.h>
#include	"curses_inc.h"
#include	<stdarg.h>

/*
 *	This routine actually executes the printf and adds it to the window
 *
 *	This code now uses the vsprintf routine, which portably digs
 *	into stdio.  We provide a vsprintf for older systems that don't
 *	have one.
 */

/*VARARGS2*/
int
vwprintw(WINDOW *win, char *fmt, va_list ap)
{
	int size = BUFSIZ;
	char *buffer;
	int n, rv;

	buffer = (char *) malloc(size);
	if (buffer == NULL)
		return (ERR);
	/*CONSTCOND*/
	while (1) {
		n = vsnprintf(buffer, size, fmt, ap);
		if (n < size)
			break;
		size *= 2;
		buffer = (char *) realloc(buffer, size);
		if (buffer == NULL)
			return (ERR);
	}
	va_end(ap);
	rv = waddstr(win, buffer);
	free(buffer);
	return (rv);
}