1 #ifndef lint
2 static char sccsid[] = "@(#)fromto.c 2.1 (CWI) 85/07/18";
3 #endif lint
4 # include "e.h"
5
fromto(p1,p2,p3)6 fromto(p1, p2, p3)
7 int p1, p2, p3;
8 {
9 float b, h1, b1, t;
10 int subps;
11
12 yyval = salloc();
13 lfont[yyval] = rfont[yyval] = 0;
14 h1 = eht[yyval] = eht[p1];
15 b1 = ebase[p1];
16 b = 0;
17 subps = ps;
18 ps += deltaps;
19 nrwid(p1, ps, p1);
20 printf(".nr %d \\n(%d\n", yyval, p1);
21 if (p2 > 0) {
22 nrwid(p2, subps, p2);
23 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, yyval, yyval, p2);
24 eht[yyval] += eht[p2];
25 b = eht[p2];
26 }
27 if (p3 > 0) {
28 nrwid(p3, subps, p3);
29 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p3, yyval, yyval, p3);
30 eht[yyval] += eht[p3];
31 }
32 printf(".ds %d ", yyval); /* bottom of middle box */
33 if (p2 > 0) {
34 t = eht[p2]-ebase[p2]+b1;
35 printf("\\v'%gm'\\h'\\n(%du-\\n(%du/2u'%s\\*(%d%s",
36 REL(t,ps), yyval, p2, DPS(ps,subps), p2, DPS(subps,ps));
37 printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
38 yyval, p2, REL(-t,ps));
39 }
40 printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du/2u'\\\n",
41 yyval, p1, p1, yyval, p1);
42 if (p3 >0) {
43 t = h1-b1+ebase[p3];
44 printf("\\v'%gm'\\h'-\\n(%du-\\n(%du/2u'%s\\*(%d%s\\h'\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
45 REL(-t,ps), yyval, p3, DPS(ps,subps), p3, DPS(subps,ps), yyval, p3, REL(t,ps));
46 }
47 printf("\n");
48 ebase[yyval] = b + b1;
49 dprintf(".\tS%d <- %d from %d to %d; h=%g b=%g\n",
50 yyval, p1, p2, p3, eht[yyval], ebase[yyval]);
51 sfree(p1);
52 if (p2 > 0)
53 sfree(p2);
54 if (p3 > 0)
55 sfree(p3);
56 }
57