/* $MirOS: src/usr.bin/oldroff/neqn/eqnbox.c,v 1.2 2008/11/08 23:04:36 tg Exp $ */

/*-
 * Copyright (c) 1979, 1980, 1981, 1986, 1988, 1990, 1991, 1992
 *     The Regents of the University of California.
 * Copyright (C) Caldera International Inc.  2001-2002.
 * Copyright (c) 2003, 2004
 *	Thorsten "mirabilos" Glaser <tg@mirbsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms,
 * with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * Redistributions of source code and documentation must retain
 * the above copyright notice, this list of conditions and the
 * following disclaimer.  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.
 *
 * All advertising materials mentioning features or use of this
 * software must display the following acknowledgement:
 *   This product includes software developed or owned by
 *   Caldera International, Inc.
 *
 * Neither the name of Caldera International, Inc. nor the names
 * of other contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
 * INTERNATIONAL, INC. 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 CALDERA INTERNATIONAL, INC. 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.
 */

#ifndef lint
static char sccsid[] = "@(#)eqnbox.c	4.3 (Berkeley) 4/17/91";
#endif

# include "e.h"

eqnbox(p1, p2, lu) {
	int b, h;
	char *sh;

	yyval = p1;
	b = max(ebase[p1], ebase[p2]);
	eht[yyval] = h = b + max(eht[p1]-ebase[p1], 
		eht[p2]-ebase[p2]);
	ebase[yyval] = b;
	if(dbg)printf(".\te:eb: S%d <- S%d S%d; b=%d, h=%d\n", 
		yyval, p1, p2, b, h);
	if (rfont[p1] == ITAL && lfont[p2] == ROM)
		sh = "\\|";
	else
		sh = "";
	if (lu) {
		printf(".nr %d \\w'\\s%d\\*(%d%s'\n", p1, ps, p1, sh);
		printf(".ds %d \\h'|\\n(97u-\\n(%du'\\*(%d\n", p1, p1, p1);
	}
	printf(".as %d \"%s\\*(%d\n", yyval, sh, p2);
	rfont[p1] = rfont[p2];
	ofree(p2);
}