/* 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); }