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
lpile(int type,int p1,int p2)20 lpile(int type, int p1, int p2)
21 {
22 int bi, hi, i, gap, h, b, nlist, nlist2, mid;
23 yyval = oalloc();
24 #ifndef NEQN
25 gap = VERT(EM(0.4, ps)); /* 4/10 m between blocks */
26 #else /* NEQN */
27 gap = VERT(1);
28 #endif /* NEQN */
29 if (type == '-') gap = 0;
30 nlist = p2 - p1;
31 nlist2 = (nlist+1)/2;
32 mid = p1 + nlist2 -1;
33 h = 0;
34 for (i = p1; i < p2; i++)
35 h += eht[lp[i]];
36 eht[yyval] = h + (nlist-1)*gap;
37 b = 0;
38 for (i = p2-1; i > mid; i--)
39 b += eht[lp[i]] + gap;
40 #ifndef NEQN
41 ebase[yyval] = (nlist%2) ? b + ebase[lp[mid]]
42 : b - VERT(EM(0.5, ps)) - gap;
43 #else /* NEQN */
44 ebase[yyval] = (nlist%2) ? b + ebase[lp[mid]]
45 : b - VERT(1) - gap;
46 #endif /* NEQN */
47 if (dbg) {
48 printf(".\tS%d <- %c pile of:", yyval, type);
49 for (i = p1; i < p2; i++)
50 printf(" S%d", lp[i]);
51 printf(";h=%d b=%d\n", eht[yyval], ebase[yyval]);
52 }
53 nrwid(lp[p1], ps, lp[p1]);
54 printf(".nr %d \\n(%d\n", yyval, lp[p1]);
55 for (i = p1+1; i < p2; i++) {
56 nrwid(lp[i], ps, lp[i]);
57 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n",
58 lp[i], yyval, yyval, lp[i]);
59 }
60 printf(".ds %d \\v'%du'\\h'%du*\\n(%du'\\\n", yyval, ebase[yyval],
61 type == 'R' ? 1 : 0, yyval);
62 for (i = p2-1; i >= p1; i--) {
63 hi = eht[lp[i]];
64 bi = ebase[lp[i]];
65 switch (type) {
66
67 case 'L':
68 printf("\\v'%du'\\*(%d\\h'-\\n(%du'\\v'0-%du'\\\n",
69 -bi, lp[i], lp[i], hi-bi+gap);
70 continue;
71 case 'R':
72 printf("\\v'%du'\\h'-\\n(%du'\\*(%d\\v'0-%du'\\\n",
73 -bi, lp[i], lp[i], hi-bi+gap);
74 continue;
75 case 'C':
76 case '-':
77 printf("\\v'%du'\\h'\\n(%du-\\n(%du/2u'\\*(%d",
78 -bi, yyval, lp[i], lp[i]);
79 printf("\\h'-\\n(%du-\\n(%du/2u'\\v'0-%du'\\\n",
80 yyval, lp[i], hi-bi+gap);
81 continue;
82 }
83 }
84 printf("\\v'%du'\\h'%du*\\n(%du'\n", eht[yyval]-ebase[yyval]+gap,
85 type != 'R' ? 1 : 0, yyval);
86 for (i = p1; i < p2; i++)
87 ofree(lp[i]);
88 lfont[yyval] = rfont[yyval] = 0;
89 }
90