tpile.c - plan9port - [fork] Plan 9 from user space
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tpile.c (2019B)
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1 #include "e.h"
2 #include "y.tab.h"
3
4 void pile(int oct)
5 {
6 int i, nlist, nlist2, mid;
7 double bi, h, b, gap, sb;
8 extern double Pilegap, Pilebase;
9 int type, p1, p2;
10
11 yyval = salloc();
12 type = lp[oct];
13 p1 = oct + 3; /* first entry */
14 p2 = p1 + lp[oct+1]; /* 1 after last */
15 gap = lp[oct+2];
16 if (gap != DEFGAP)
17 gap = EM(gap/100.0, ps);
18 else if (type == COL)
19 gap = 0;
20 else
21 gap = EM(Pilegap, ps); /* 0.4 m between LCOL, etc. */
22 nlist = p2 - p1;
23 nlist2 = (nlist+1)/2;
24 mid = p1 + nlist2 - 1;
25 h = 0;
26 for (i = p1; i < p2; i++)
27 h += eht[lp[i]];
28 eht[yyval] = h + (nlist-1)*gap;
29 b = 0;
30 for (i = p2-1; i > mid; i--)
31 b += eht[lp[i]] + gap;
32 ebase[yyval] = (nlist%2) ? b + ebase[lp[mid]]
33 : b - EM(Pilebase, ps) - gap;
34 if (dbg) {
35 printf(".\tS%d <- %d pile of:", (int)yyval, type);
36 for (i = p1; i < p2; i++)
37 printf(" S%d", lp[i]);
38 printf("; h=%g b=%g\n", eht[yyval], ebase[yyval]);
39 }
40 nrwid(lp[p1], ps, lp[p1]);
41 printf(".nr %d \\n(%d\n", (int)yyval, lp[p1]);
42 for (i = p1+1; i < p2; i++) {
43 nrwid(lp[i], ps, lp[i]);
44 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n",
45 lp[i], (int)yyval, (int)yyval, lp[i]);
46 }
47 printf(".ds %d \\v'%gm'\\h'%du*\\n(%du'\\\n", (int)yyval, REL(ebase[yyval],ps),
48 type==RCOL ? 1 : 0, (int)yyval);
49 sb = 0; /* sum of box hts */
50 for (i = p2-1; i >= p1; i--) {
51 bi = sb + ebase[lp[i]];
52 switch (type) {
53 case LCOL:
54 printf("\\v'%gm'\\*(%d\\h'-\\n(%du'\\v'%gm'\\\n",
55 REL(-bi,ps), lp[i], lp[i], REL(bi,ps));
56 break;
57 case RCOL:
58 printf("\\v'%gm'\\h'-\\n(%du'\\*(%d\\v'%gm'\\\n",
59 REL(-bi,ps), lp[i], lp[i], REL(bi,ps));
60 break;
61 case CCOL:
62 case COL:
63 printf("\\v'%gm'\\h'\\n(%du-\\n(%du/2u'\\*(%d",
64 REL(-bi,ps), (int)yyval, lp[i], lp[i]);
65 printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%gm'\\\n",
66 (int)yyval, lp[i], REL(bi,ps));
67 break;
68 }
69 sb += eht[lp[i]] + gap;
70 }
71 printf("\\v'%gm'\\h'%du*\\n(%du'\n", REL(-ebase[yyval],ps),
72 type!=RCOL ? 1 : 0, (int)yyval);
73 for (i = p1; i < p2; i++)
74 sfree(lp[i]);
75 lfont[yyval] = rfont[yyval] = 0;
76 }