This is for a question that Dominus posed in the chatterbox. binround will return the next highest power of two. the code is a little test script for it. based off the dec2bin recipie from the cookbook. 
for ($foo=1; $foo<211;$foo++){
    print "$foo ". dec2bin($foo) . " binrounded is ";
    $binfoo= (binround ($foo));
    print "$binfoo\n";
}

sub binround{
    my $str = unpack("B32", pack("N", shift));
    $str =~ s/^0+(?=\d)//;
    $str=~/^.(.*)/; #first char should always be 1, thanks to above.
    $str="1" . "0" x (length ($1)+(($1=~/1/)));
}

sub dec2bin {
    my $str = unpack("B32", pack("N", shift));
    $str =~ s/^0+(?=\d)//;   # otherwise you'll get leading zeros
    return $str;
}

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In reply to Power of two round up. by boo_radley

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