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[unix-history] / usr / src / old / lib2648 / mat.c

/*      mat.c   4.1     83/03/09        */
/*
* mat: retrieve the value in m[r, c].
* rows and cols are the size of the matrix in all these routines.
*/

#include "bit.h"

int
mat(m, rows, cols, r, c)
register bitmat m;
register int c;
int rows, cols, r;
{
       register int thisbyte;

       thisbyte = m[r*((cols+7)>>3) + (c>>3)] & 0xff;
       thisbyte &= 0x80 >> (c&7);
       return (thisbyte != 0);
}