1 /*
2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
7 /* All Rights Reserved */
8
9 /*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved. The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15 #include "e.h"
16
17 void
fromto(int p1,int p2,int p3)18 fromto(int p1, int p2, int p3)
19 {
20 int b, h1, b1, pss;
21 yyval = oalloc();
22 lfont[yyval] = rfont[yyval] = 0;
23 h1 = eht[yyval] = eht[p1];
24 b1 = ebase[p1];
25 b = 0;
26 pss = EFFPS(ps);
27 ps += 3;
28 nrwid(p1, ps, p1);
29 printf(".nr %d \\n(%d\n", yyval, p1);
30 if (p2 > 0) {
31 nrwid(p2, pss, p2);
32 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n",
33 p2, yyval, yyval, p2);
34 eht[yyval] += eht[p2];
35 b = eht[p2];
36 }
37 if (p3 > 0) {
38 nrwid(p3, pss, p3);
39 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n",
40 p3, yyval, yyval, p3);
41 eht[yyval] += eht[p3];
42 }
43 printf(".ds %d ", yyval); /* bottom of middle box */
44 if (p2 > 0) {
45 printf("\\v'%du'\\h'\\n(%du-\\n(%du/2u'\\s%d\\*(%d\\s%d",
46 eht[p2]-ebase[p2]+b1, yyval, p2, pss, p2, EFFPS(ps));
47 printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%du'\\\n",
48 yyval, p2, -(eht[p2]-ebase[p2]+b1));
49 }
50 #ifndef NEQN
51 printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du/2u'\\\n",
52 yyval, p1, p1, yyval, p1);
53 #else /* NEQN */
54 printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du+2u/2u'\\\n",
55 yyval, p1, p1, yyval, p1);
56 #endif /* NEQN */
57 if (p3 > 0) {
58 printf("\\v'%du'\\h'-\\n(%du-\\n(%du/2u'\\s%d\\*(%d\\s%d"
59 "\\h'\\n(%du-\\n(%du/2u'\\v'%du'\\\n",
60 -(h1-b1+ebase[p3]), yyval, p3, pss, p3, EFFPS(ps),
61 yyval, p3, (h1-b1+ebase[p3]));
62 }
63 printf("\n");
64 ebase[yyval] = b + b1;
65 if (dbg)
66 printf(".\tfrom to: S%d <- %d f %d t %d; h=%d b=%d\n",
67 yyval, p1, p2, p3, eht[yyval], ebase[yyval]);
68 ofree(p1);
69 if (p2 > 0) ofree(p2);
70 if (p3 > 0) ofree(p3);
71 }
72