1 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
2 /* All Rights Reserved */
3
4
5 /*
6 * Copyright (c) 1980 Regents of the University of California.
7 * All rights reserved. The Berkeley software License Agreement
8 * specifies the terms and conditions for redistribution.
9 */
10
11 /*
12 * Copyright (c) 1983, 1984 1985, 1986, 1987, 1988, Sun Microsystems, Inc.
13 * All Rights Reserved.
14 */
15
16 /* from OpenSolaris "eqnbox.c 1.3 05/06/02 SMI" SVr4.0 1.1 */
17
18 /*
19 * Portions Copyright (c) 2005 Gunnar Ritter, Freiburg i. Br., Germany
20 *
21 * Sccsid @(#)eqnbox.c 1.7 (gritter) 1/13/08
22 */
23
24 /*
25 * Changes Copyright (c) 2014 Carsten Kunze (carsten.kunze at arcor.de)
26 */
27
28 # include "e.h"
29 #include "y.tab.h"
30
31 extern YYSTYPE yyval;
32
33 void
eqnbox(int p1,int p2,int lu)34 eqnbox(int p1, int p2, int lu) {
35 #ifndef NEQN
36 float b, h;
37 #else /* NEQN */
38 int b, h;
39 #endif /* NEQN */
40 char *sh;
41
42 yyval.token = p1;
43 b = max(ebase[p1], ebase[p2]);
44 eht[yyval.token] = h = b + max(eht[p1]-ebase[p1],
45 eht[p2]-ebase[p2]);
46 ebase[yyval.token] = b;
47 #ifndef NEQN
48 if(dbg)printf(".\te:eb: S%d <- S%d S%d; b=%g, h=%g\n",
49 yyval.token, p1, p2, b, h);
50 #else /* NEQN */
51 if(dbg)printf(".\te:eb: S%d <- S%d S%d; b=%d, h=%d\n",
52 yyval.token, p1, p2, b, h);
53 #endif /* NEQN */
54 if (ital(rfont[p1]) && rom(lfont[p2])) {
55 if (op(lfont[p2]))
56 sh = "\\|";
57 else
58 sh = "\\^";
59 } else
60 sh = "";
61 if (lu) {
62 printf(".nr %d \\w'\\s%s\\*(%d%s'\n", p1, tsize(ps), p1, sh);
63 printf(".ds %d \\h'|\\n(97u-\\n(%du'\\*(%d\n", p1, p1, p1);
64 }
65 printf(".as %d \"%s\\*(%d\n", yyval.token, sh, p2);
66 rfont[p1] = rfont[p2];
67 ofree(p2);
68 }
69