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Annotation of researchv10dc/630/man/src/p_man/man3/rol.3l, revision 1.1

1.1     ! root        1: .ds ZZ DEVELOPMENT PACKAGE
        !             2: .TH ROL 3L "630 MTG"
        !             3: .XE "rol()"
        !             4: .XE "ror()"
        !             5: .SH NAME
        !             6: rol, ror \- rotate bits
        !             7: .SH SYNOPSIS
        !             8: .B int rol (x, n)
        !             9: .sp
        !            10: .B int ror (x, n)
        !            11: .sp
        !            12: .B int x, n; 
        !            13: .SH DESCRIPTION
        !            14: The
        !            15: .I rol
        !            16: function
        !            17: returns
        !            18: .I x
        !            19: logically bit-rotated left by
        !            20: .I n.
        !            21: .PP
        !            22: The
        !            23: .I ror
        !            24: function
        !            25: returns
        !            26: .I x
        !            27: logically bit-rotated right by
        !            28: .I n.
        !            29: .SH EXAMPLE
        !            30: The following subroutine can be used to determine whether a Point
        !            31: .I p
        !            32: in a Bitmap
        !            33: .I b
        !            34: is on or off (returning 1 or 0, respectively).
        !            35: .PP
        !            36: .RS 3
        !            37: .nf
        !            38: .ft CM
        !            39: #include <dmd.h>
        !            40: 
        !            41: pixel (b, p)
        !            42: Bitmap *b;
        !            43: Point  p;
        !            44: {
        !            45:        Word *w;
        !            46: 
        !            47:        w = addr (b, p);
        !            48:        return ( (rol (*w, p.x%\s-1WORDSIZE\s+1)
        !            49:                & \s-1FIRSTBIT\s+1)==\s-1FIRSTBIT\s+1);
        !            50: }
        !            51: \fR
        !            52: .fi
        !            53: .RE
        !            54: .PP
        !            55: This routine is implemented differently in
        !            56: .IR addr (3R).
        !            57: .SH SEE ALSO
        !            58: addr(3R).
        !            59: 

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