Update: Apparently I should point out that this code (obviously) has the same limitation as any code that uses Perl's NV (double) format numbers, it is limited to 53-bits of precision. 

sub hex16dec{ 
    my( $hi, $lo ) = split '(.{8}$)', $_[0]; 
    return hex( $hi ) * 2**32 + hex( $lo ); 
}
$value = '123456789ABCDEF';
printf "%.f\n", hex16dec $value;

81985529216486896

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In reply to Re: converting big hex to dec by BrowserUk
in thread converting big hex to dec by Anonymous Monk

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