/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/


/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved. The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */
     
/*
 * Copyright (c) 1983, 1984 1985, 1986, 1987, 1988, Sun Microsystems, Inc.
 * All Rights Reserved.
 */
  
/*	from OpenSolaris "over.c	1.4	05/06/02 SMI"	 SVr4.0 1.1		*/

/*
 * Portions Copyright (c) 2005 Gunnar Ritter, Freiburg i. Br., Germany
 *
 * Sccsid @(#)over.c	1.5 (gritter) 10/19/06
 */

/*
 * Changes Copyright (c) 2014 Carsten Kunze (carsten.kunze at arcor.de)
 */

# include "e.h"
#include "y.tab.h"

extern YYSTYPE yyval;

void
boverb(int p1, int p2) {
	int treg;
#ifndef	NEQN
	float h, b, d;
#else	/* NEQN */
	int h, b, d;
#endif	/* NEQN */

	treg = oalloc();
	yyval.token = p1;
#ifndef NEQN
	d = VERT(EM(0.3, ps));
	h = eht[p1] + eht[p2] + d;
#else /* NEQN */
	d = VERT(1);
	h = eht[p1] + eht[p2];
#endif /* NEQN */
	b = eht[p2] - d;
#ifndef	NEQN
	if(dbg)printf(".\tb:bob: S%d <- S%d over S%d; b=%g, h=%g\n", 
		yyval.token, p1, p2, b, h);
#else	/* NEQN */
	if(dbg)printf(".\tb:bob: S%d <- S%d over S%d; b=%d, h=%d\n", 
		yyval.token, p1, p2, b, h);
#endif	/* NEQN */
	nrwid(p1, ps, p1);
	nrwid(p2, ps, p2);
	printf(".nr %d \\n(%d\n", treg, p1);
	printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, treg, treg, p2);
#ifndef NEQN
	printf(".nr %d \\n(%d+\\s%s.5m\\s0\n", treg, treg, tsize(EFFPS(ps)));
	printf(".ds %d \\v'%gp'\\h'\\n(%du-\\n(%du/2u'\\*(%d\\\n", 
		yyval.token, eht[p2]-ebase[p2]-d, treg, p2, p2);
	printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%gp'\\*(%d\\\n", 
		p2, p1, -(eht[p2]-ebase[p2]+d+ebase[p1]), p1);
	printf("\\h'-\\n(%du-\\n(%du/2u+.1m'\\v'%gp'\\l'\\n(%du-.2m'\\h'.1m'\\v'%gp'\n", 
		 treg, p1, ebase[p1]+d, treg, d);
#else /* NEQN */
	printf(".ds %d \\v'%du'\\h'\\n(%du-\\n(%du/2u'\\*(%d\\\n", 
		yyval.token, eht[p2]-ebase[p2]-d, treg, p2, p2);
	printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%du'\\*(%d\\\n", 
		p2, p1, -eht[p2]+ebase[p2]-ebase[p1], p1);
	printf("\\h'-\\n(%du-\\n(%du-2u/2u'\\v'%du'\\l'\\n(%du'\\v'%du'\n", 
		 treg, p1, ebase[p1], treg, d);
#endif /* NEQN */
	ebase[yyval.token] = b;
	eht[yyval.token] = h;
	lfont[yyval.token] = rfont[yyval.token] = 0;
	ofree(p2);
	ofree(treg);
}