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Re: Bitwise Operator Error

by broomduster (Priest)
on Oct 02, 2008 at 18:49 UTC ( #715067=note: print w/ replies, xml ) Need Help??


in reply to Bitwise Operator Error

Your hexadecimal number in $testString needs to begin with 0x be properly interpreted as hexadecimal. Then it will work. You can also simplify your white-space removal. All together, here is one way to get where you want to go:

$testString =~ s/\s+//g;
$testString =~ s/^/0x/; $maskResult = $testString & 400000000000000000000000;
$maskResult = hex( $testString ) & 0x400000000000000000000000;

Updated: Need to use hex and need to have mask as hex string.

Updated 2: I see ikegami has also pointed out my error(s) corrected above.

Updated 3: and ikegami has also noted the need for Math::BigInt here.


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Re^2: Bitwise Operator Error
by ravishi (Acolyte) on Oct 02, 2008 at 19:05 UTC
    Thanks for the help but I just tried what you suggested and it doesn't seem to work. It outputs a 0 which is correct but I get a warning saying that it isn't numeric. I then changed the first bit of the original string to an F to test if I get an output of 1, and I still get a 0.
Re^2: Bitwise Operator Error
by ikegami (Pope) on Oct 02, 2008 at 19:18 UTC

    That's wrong.

    >perl -we"print 0+'0x0001'" Argument "0x0001" isn't numeric in addition (+) at -e line 1. 0

    See my reply to the OP for details

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