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How do I convert a very long bit string into a number?

by jdporter (Canon)
on Jan 15, 2009 at 21:42 UTC ( #736683=categorized question: print w/replies, xml ) Need Help??
Contributed by jdporter on Jan 15, 2009 at 21:42 UTC
Q&A  > math


I'm calling a function from a third-party module which advertises as returning a very long bit string. I want to use this value as a true perl number, e.g. to do math on it. How can I do that?

Answer: How do I convert a very long bit string into a number?
contributed by jdporter

Combine unpack with Math::BigInt:

use Math::BigInt; use bigint; use strict; use warnings; sub convert_bitstring_to_number { my $bitstring = shift; my $h = unpack( 'H*', $bitstring ); my $bh = new Math::BigInt '0x'.$h; $bh->as_int; }

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