1fad8efc2Sjaap #ifndef lint
2*a2224dd0Sjaap static char sccsid[] = "@(#)fromto.c 2.1 (CWI) 85/07/18";
3*a2224dd0Sjaap #endif lint
4fad8efc2Sjaap # include "e.h"
5fad8efc2Sjaap
fromto(p1,p2,p3)6*a2224dd0Sjaap fromto(p1, p2, p3)
7*a2224dd0Sjaap int p1, p2, p3;
8*a2224dd0Sjaap {
9*a2224dd0Sjaap float b, h1, b1, t;
10*a2224dd0Sjaap int subps;
11*a2224dd0Sjaap
12*a2224dd0Sjaap yyval = salloc();
13fad8efc2Sjaap lfont[yyval] = rfont[yyval] = 0;
14fad8efc2Sjaap h1 = eht[yyval] = eht[p1];
15fad8efc2Sjaap b1 = ebase[p1];
16fad8efc2Sjaap b = 0;
17*a2224dd0Sjaap subps = ps;
18*a2224dd0Sjaap ps += deltaps;
19fad8efc2Sjaap nrwid(p1, ps, p1);
20fad8efc2Sjaap printf(".nr %d \\n(%d\n", yyval, p1);
21fad8efc2Sjaap if (p2 > 0) {
22*a2224dd0Sjaap nrwid(p2, subps, p2);
23fad8efc2Sjaap printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, yyval, yyval, p2);
24fad8efc2Sjaap eht[yyval] += eht[p2];
25fad8efc2Sjaap b = eht[p2];
26fad8efc2Sjaap }
27fad8efc2Sjaap if (p3 > 0) {
28*a2224dd0Sjaap nrwid(p3, subps, p3);
29fad8efc2Sjaap printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p3, yyval, yyval, p3);
30fad8efc2Sjaap eht[yyval] += eht[p3];
31fad8efc2Sjaap }
32fad8efc2Sjaap printf(".ds %d ", yyval); /* bottom of middle box */
33fad8efc2Sjaap if (p2 > 0) {
34*a2224dd0Sjaap t = eht[p2]-ebase[p2]+b1;
35*a2224dd0Sjaap printf("\\v'%gm'\\h'\\n(%du-\\n(%du/2u'%s\\*(%d%s",
36*a2224dd0Sjaap REL(t,ps), yyval, p2, DPS(ps,subps), p2, DPS(subps,ps));
37*a2224dd0Sjaap printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
38*a2224dd0Sjaap yyval, p2, REL(-t,ps));
39fad8efc2Sjaap }
40fad8efc2Sjaap printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du/2u'\\\n",
41fad8efc2Sjaap yyval, p1, p1, yyval, p1);
42fad8efc2Sjaap if (p3 >0) {
43*a2224dd0Sjaap t = h1-b1+ebase[p3];
44*a2224dd0Sjaap printf("\\v'%gm'\\h'-\\n(%du-\\n(%du/2u'%s\\*(%d%s\\h'\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
45*a2224dd0Sjaap REL(-t,ps), yyval, p3, DPS(ps,subps), p3, DPS(subps,ps), yyval, p3, REL(t,ps));
46fad8efc2Sjaap }
47fad8efc2Sjaap printf("\n");
48fad8efc2Sjaap ebase[yyval] = b + b1;
49*a2224dd0Sjaap dprintf(".\tS%d <- %d from %d to %d; h=%g b=%g\n",
50fad8efc2Sjaap yyval, p1, p2, p3, eht[yyval], ebase[yyval]);
51*a2224dd0Sjaap sfree(p1);
52*a2224dd0Sjaap if (p2 > 0)
53*a2224dd0Sjaap sfree(p2);
54*a2224dd0Sjaap if (p3 > 0)
55*a2224dd0Sjaap sfree(p3);
56fad8efc2Sjaap }
57