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
lpile(int type,int p1,int p2)18 lpile(int type, int p1, int p2)
19 {
20 int bi, hi, i, gap, h, b, nlist, nlist2, mid;
21 yyval = oalloc();
22 #ifndef NEQN
23 gap = VERT(EM(0.4, ps)); /* 4/10 m between blocks */
24 #else /* NEQN */
25 gap = VERT(1);
26 #endif /* NEQN */
27 if (type == '-') gap = 0;
28 nlist = p2 - p1;
29 nlist2 = (nlist+1)/2;
30 mid = p1 + nlist2 -1;
31 h = 0;
32 for (i = p1; i < p2; i++)
33 h += eht[lp[i]];
34 eht[yyval] = h + (nlist-1)*gap;
35 b = 0;
36 for (i = p2-1; i > mid; i--)
37 b += eht[lp[i]] + gap;
38 #ifndef NEQN
39 ebase[yyval] = (nlist%2) ? b + ebase[lp[mid]]
40 : b - VERT(EM(0.5, ps)) - gap;
41 #else /* NEQN */
42 ebase[yyval] = (nlist%2) ? b + ebase[lp[mid]]
43 : b - VERT(1) - gap;
44 #endif /* NEQN */
45 if (dbg) {
46 printf(".\tS%d <- %c pile of:", yyval, type);
47 for (i = p1; i < p2; i++)
48 printf(" S%d", lp[i]);
49 printf(";h=%d b=%d\n", eht[yyval], ebase[yyval]);
50 }
51 nrwid(lp[p1], ps, lp[p1]);
52 printf(".nr %d \\n(%d\n", yyval, lp[p1]);
53 for (i = p1+1; i < p2; i++) {
54 nrwid(lp[i], ps, lp[i]);
55 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n",
56 lp[i], yyval, yyval, lp[i]);
57 }
58 printf(".ds %d \\v'%du'\\h'%du*\\n(%du'\\\n", yyval, ebase[yyval],
59 type == 'R' ? 1 : 0, yyval);
60 for (i = p2-1; i >= p1; i--) {
61 hi = eht[lp[i]];
62 bi = ebase[lp[i]];
63 switch (type) {
64
65 case 'L':
66 printf("\\v'%du'\\*(%d\\h'-\\n(%du'\\v'0-%du'\\\n",
67 -bi, lp[i], lp[i], hi-bi+gap);
68 continue;
69 case 'R':
70 printf("\\v'%du'\\h'-\\n(%du'\\*(%d\\v'0-%du'\\\n",
71 -bi, lp[i], lp[i], hi-bi+gap);
72 continue;
73 case 'C':
74 case '-':
75 printf("\\v'%du'\\h'\\n(%du-\\n(%du/2u'\\*(%d",
76 -bi, yyval, lp[i], lp[i]);
77 printf("\\h'-\\n(%du-\\n(%du/2u'\\v'0-%du'\\\n",
78 yyval, lp[i], hi-bi+gap);
79 continue;
80 }
81 }
82 printf("\\v'%du'\\h'%du*\\n(%du'\n", eht[yyval]-ebase[yyval]+gap,
83 type != 'R' ? 1 : 0, yyval);
84 for (i = p1; i < p2; i++)
85 ofree(lp[i]);
86 lfont[yyval] = rfont[yyval] = 0;
87 }
88