plan9port

fork of plan9port with libvec, libstr and libsdb
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pile.c (2019B)


      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 }