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Annotation of 42BSD/usr.lib/lib2648/mat.c, revision 1.1.1.1

1.1       root        1: /*     mat.c   4.1     83/03/09        */
                      2: /*
                      3:  * mat: retrieve the value in m[r, c].
                      4:  * rows and cols are the size of the matrix in all these routines.
                      5:  */
                      6: 
                      7: #include "bit.h"
                      8: 
                      9: int
                     10: mat(m, rows, cols, r, c)
                     11: register bitmat m;
                     12: register int c;
                     13: int rows, cols, r;
                     14: {
                     15:        register int thisbyte;
                     16: 
                     17:        thisbyte = m[r*((cols+7)>>3) + (c>>3)] & 0xff;
                     18:        thisbyte &= 0x80 >> (c&7);
                     19:        return (thisbyte != 0);
                     20: }

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