xref: /illumos-gate/usr/src/cmd/eqn/matrix.c (revision 7a6d80f1660abd4755c68cbd094d4a914681d26e)
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
18 column(int type, int p1)
19 {
20 	int i;
21 
22 	lp[p1] = ct - p1 - 1;
23 	if (dbg) {
24 		printf(".\t%d column of", type);
25 		for (i = p1 + 1; i < ct; i++)
26 			printf(" S%d", lp[i]);
27 		printf(", rows=%d\n", lp[p1]);
28 	}
29 	lp[ct++] = type;
30 }
31 
32 void
33 matrix(int p1)
34 {
35 	int nrow, ncol, i, j, k, hb, b, val[100];
36 	char *space;
37 
38 	space = "\\ \\ ";
39 	nrow = lp[p1];	/* disaster if rows inconsistent */
40 	ncol = 0;
41 	for (i = p1; i < ct; i += lp[i] + 2) {
42 		ncol++;
43 		if (dbg) printf(".\tcolct=%d\n", lp[i]);
44 	}
45 	for (k = 1; k <= nrow; k++) {
46 		hb = b = 0;
47 		j = p1 + k;
48 		for (i = 0; i < ncol; i++) {
49 			hb = max(hb, eht[lp[j]]-ebase[lp[j]]);
50 			b = max(b, ebase[lp[j]]);
51 			j += nrow + 2;
52 		}
53 		if (dbg) printf(".\trow %d: b=%d, hb=%d\n", k, b, hb);
54 		j = p1 + k;
55 		for (i = 0; i < ncol; i++) {
56 			ebase[lp[j]] = b;
57 			eht[lp[j]] = b + hb;
58 			j += nrow + 2;
59 		}
60 	}
61 	j = p1;
62 	for (i = 0; i < ncol; i++) {
63 		lpile(lp[j+lp[j]+1], j+1, j+lp[j]+1);
64 		val[i] = yyval;
65 		j += nrow + 2;
66 	}
67 	yyval = oalloc();
68 	eht[yyval] = eht[val[0]];
69 	ebase[yyval] = ebase[val[0]];
70 	lfont[yyval] = rfont[yyval] = 0;
71 	if (dbg)
72 		printf(".\tmatrix S%d: r=%d, c=%d, h=%d, b=%d\n",
73 		    yyval, nrow, ncol, eht[yyval], ebase[yyval]);
74 	printf(".ds %d \"", yyval);
75 	for (i = 0; i < ncol; i++) {
76 		printf("\\*(%d%s", val[i], i == ncol-1 ? "" : space);
77 		ofree(val[i]);
78 	}
79 	printf("\n");
80 	ct = p1;
81 }
82