Re: Which bit is set? (inverse of (1<<$value) operator)

[grizzley]

in reply to Which bit is set? (inverse of (1<<$value) operator)

In description of unpack there is following method to count number of bits:

# Count the bits in a chunk of memory (e.g. a select vector)
unpack( '%32b*', $mask );

Update: sorry, I misunderstood question. If you have string of bits with one bit set, then you could try just $bitstring =~ /1(0*)$/; $originalvalue = length($1)+1;

[wirito]

Nope, it's a two-byte int, not a strings filled with 0's and 1's.