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Annotation of 43BSDTahoe/usr.lib/lib2648/mat.c, revision 1.1

1.1     ! root        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) 4/30/85";
        !             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: }

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