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 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