1 # include "e.h"
2
fromto(int p1,int p2,int p3)3 void fromto(int p1, int p2, int p3)
4 {
5 double b, h1, b1, t;
6 int subps;
7
8 yyval = salloc();
9 lfont[yyval] = rfont[yyval] = 0;
10 h1 = eht[yyval] = eht[p1];
11 b1 = ebase[p1];
12 b = 0;
13 subps = ps;
14 ps += deltaps;
15 nrwid(p1, ps, p1);
16 printf(".nr %d \\n(%d\n", yyval, p1);
17 if (p2 > 0) {
18 nrwid(p2, subps, p2);
19 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, yyval, yyval, p2);
20 eht[yyval] += eht[p2];
21 b = eht[p2];
22 }
23 if (p3 > 0) {
24 nrwid(p3, subps, p3);
25 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p3, yyval, yyval, p3);
26 eht[yyval] += eht[p3];
27 }
28 printf(".ds %d ", yyval); /* bottom of middle box */
29 if (p2 > 0) {
30 t = eht[p2]-ebase[p2]+b1;
31 printf("\\v'%gm'\\h'\\n(%du-\\n(%du/2u'%s\\*(%d%s",
32 REL(t,ps), yyval, p2, DPS(ps,subps), p2, DPS(subps,ps));
33 printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
34 yyval, p2, REL(-t,ps));
35 }
36 printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du/2u'\\\n",
37 yyval, p1, p1, yyval, p1);
38 if (p3 >0) {
39 t = h1-b1+ebase[p3];
40 printf("\\v'%gm'\\h'-\\n(%du-\\n(%du/2u'%s\\*(%d%s\\h'\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
41 REL(-t,ps), yyval, p3, DPS(ps,subps), p3, DPS(subps,ps), yyval, p3, REL(t,ps));
42 }
43 printf("\n");
44 ebase[yyval] = b + b1;
45 dprintf(".\tS%d <- %d from %d to %d; h=%g b=%g\n",
46 yyval, p1, p2, p3, eht[yyval], ebase[yyval]);
47 sfree(p1);
48 if (p2 > 0)
49 sfree(p2);
50 if (p3 > 0)
51 sfree(p3);
52 }
53