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 #pragma ident "%Z%%M% %I% %E% SMI"
16
17 #include "e.h"
18
19 void
fromto(int p1,int p2,int p3)20 fromto(int p1, int p2, int p3)
21 {
22 int b, h1, b1, pss;
23 yyval = oalloc();
24 lfont[yyval] = rfont[yyval] = 0;
25 h1 = eht[yyval] = eht[p1];
26 b1 = ebase[p1];
27 b = 0;
28 pss = EFFPS(ps);
29 ps += 3;
30 nrwid(p1, ps, p1);
31 printf(".nr %d \\n(%d\n", yyval, p1);
32 if (p2 > 0) {
33 nrwid(p2, pss, p2);
34 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n",
35 p2, yyval, yyval, p2);
36 eht[yyval] += eht[p2];
37 b = eht[p2];
38 }
39 if (p3 > 0) {
40 nrwid(p3, pss, p3);
41 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n",
42 p3, yyval, yyval, p3);
43 eht[yyval] += eht[p3];
44 }
45 printf(".ds %d ", yyval); /* bottom of middle box */
46 if (p2 > 0) {
47 printf("\\v'%du'\\h'\\n(%du-\\n(%du/2u'\\s%d\\*(%d\\s%d",
48 eht[p2]-ebase[p2]+b1, yyval, p2, pss, p2, EFFPS(ps));
49 printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%du'\\\n",
50 yyval, p2, -(eht[p2]-ebase[p2]+b1));
51 }
52 #ifndef NEQN
53 printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du/2u'\\\n",
54 yyval, p1, p1, yyval, p1);
55 #else /* NEQN */
56 printf("\\h'\\n(%du-\\n(%du/2u'\\*(%d\\h'\\n(%du-\\n(%du+2u/2u'\\\n",
57 yyval, p1, p1, yyval, p1);
58 #endif /* NEQN */
59 if (p3 > 0) {
60 printf("\\v'%du'\\h'-\\n(%du-\\n(%du/2u'\\s%d\\*(%d\\s%d"
61 "\\h'\\n(%du-\\n(%du/2u'\\v'%du'\\\n",
62 -(h1-b1+ebase[p3]), yyval, p3, pss, p3, EFFPS(ps),
63 yyval, p3, (h1-b1+ebase[p3]));
64 }
65 printf("\n");
66 ebase[yyval] = b + b1;
67 if (dbg)
68 printf(".\tfrom to: S%d <- %d f %d t %d; h=%d b=%d\n",
69 yyval, p1, p2, p3, eht[yyval], ebase[yyval]);
70 ofree(p1);
71 if (p2 > 0) ofree(p2);
72 if (p3 > 0) ofree(p3);
73 }
74