1 /*
2 * Copyright (c) 1980 Regents of the University of California.
3 * All rights reserved. The Berkeley software License Agreement
4 * specifies the terms and conditions for redistribution.
5 */
6
7 #ifndef lint
8 static char sccsid[] = "@(#)mat.c 5.1 (Berkeley) 04/30/85";
9 #endif not lint
10
11 /*
12 * mat: retrieve the value in m[r, c].
13 * rows and cols are the size of the matrix in all these routines.
14 */
15
16 #include "bit.h"
17
18 int
mat(m,rows,cols,r,c)19 mat(m, rows, cols, r, c)
20 register bitmat m;
21 register int c;
22 int rows, cols, r;
23 {
24 register int thisbyte;
25
26 thisbyte = m[r*((cols+7)>>3) + (c>>3)] & 0xff;
27 thisbyte &= 0x80 >> (c&7);
28 return (thisbyte != 0);
29 }
30