1 #include "e.h"
2 
3 void boverb(int p1, int p2)
4 {
5 	int treg;
6 	double h, b, d, d1, d2;
7 	extern double Overgap, Overwid, Overline;
8 
9 	treg = salloc();
10 	yyval = p1;
11 	d = EM(Overgap, ps);
12 	h = eht[p1] + eht[p2] + d;
13 	b = eht[p2] - d;
14 	dprintf(".\tS%d <- %d over %d; b=%g, h=%g\n",
15 		(int)yyval, p1, p2, b, h);
16 	nrwid(p1, ps, p1);
17 	nrwid(p2, ps, p2);
18 	printf(".nr %d \\n(%d\n", treg, p1);
19 	printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, treg, treg, p2);
20 	printf(".nr %d \\n(%d+%gm\n", treg, treg, Overwid);
21 	d2 = eht[p2]-ebase[p2]-d;	/* denom */
22 	printf(".ds %d \\v'%gm'\\h'\\n(%du-\\n(%du/2u'\\*(%d\\v'%gm'\\\n",
23 		(int)yyval, REL(d2,ps), treg, p2, p2, REL(-d2,ps));
24 	d1 = 2 * d + ebase[p1];		/* num */
25 	printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%gm'\\*(%d\\v'%gm'\\\n",
26 		p2, p1, REL(-d1,ps), p1, REL(d1,ps));
27 	printf("\\h'-\\n(%du-\\n(%du/2u+%gm'\\v'%gm'\\l'\\n(%du-%gm'\\h'%gm'\\v'%gm'\n",
28 		treg, p1, Overline, REL(-d,ps),
29 		treg, 2*Overline, Overline, REL(d,ps));
30 	ebase[yyval] = b;
31 	eht[yyval] = h;
32 	lfont[yyval] = rfont[yyval] = 0;
33 	sfree(p2);
34 	sfree(treg);
35 }