Re: zero fill with pack

Note: The print unpack 'H*', is just a simulation of hexl-mode. It's the pack bit which does the work:

print unpack 'H*', pack 'Q>', 654848;;
000000000009fe00

## With a Perl that doesn't support 64-bit ints (Q). 
## Corrected  &.v.% per ikegami++
print unpack 'H*', pack 'NN', int( $n / 2**32 ), $n % 0xffffffff;; 
000000000009fe00
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Comment on Re: zero fill with pack Select or Download Code

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Re^2: zero fill with pack by ikegami (Patriarch) on Jun 22, 2010 at 16:51 UTC
`$n & 0xffffffff` won't work. You need `$n % 0xffffffff`.	[reply] [d/l] [select]
Re^3: zero fill with pack by BrowserUk (Patriarch) on Jun 22, 2010 at 16:53 UTC
Works for my (64-bit) Perl ;)	[reply]
Re^4: zero fill with pack by ikegami (Patriarch) on Jun 22, 2010 at 17:10 UTC
Yes, but that code was specifically written for "a Perl that doesn't support 64-bit ints (Q)." The bitwise ops (i.e. "`&`") currently require native integer arguments, and those can be at most `0xFFFFFFFF` in such a Perl.	[reply] [d/l] [select]