Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

how to print 'normal' string from hex string?

by llagos (Initiate)
on Nov 22, 2011 at 16:31 UTC ( #939489=perlquestion: print w/replies, xml ) Need Help??
llagos has asked for the wisdom of the Perl Monks concerning the following question:

Hi. I've got a string which is in hex format. Like this:
$hex_string = "4d414a523e576573742d622053544d2d31204d532d41495328434c4 +5415229"
In 'normal' text this is "MAJR>West-b STM-1 MS-AIS(CLEAR)" How do I easily print this? I tried print hex $hex_string, but this converts to a number, so I get an Integer Overflow :( Regards, Leo

Replies are listed 'Best First'.
Re: how to print 'normal' string from hex string?
by Eliya (Vicar) on Nov 22, 2011 at 16:37 UTC
Re: how to print 'normal' string from hex string?
by johngg (Abbot) on Nov 22, 2011 at 17:36 UTC

    Expanding Eliya's reply slightly.

    knoppix@Microknoppix:~$ perl -E ' > $hex = q{4d414a523e576573742d622053544d2d31204d532d41495328434c45415 +229}; > $str = unpack q{a*}, pack q{H*}, $hex; > say $str;' MAJR>West-b STM-1 MS-AIS(CLEAR) knoppix@Microknoppix:~$

    As BrowserUk points out, the unpack here is not necessary.



      What is the unpack 'a*' bit for?

      print pack 'H*', "4d414a523e576573742d622053544d2d31204d532d4149532843 +4c45415229";; MAJR>West-b STM-1 MS-AIS(CLEAR)

      With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
        What is the unpack 'a*' bit for?

        It is a side effect of my still somewhat flaky understanding of pack/unpack or, in other words, completely un-necessary :-(

        I will update my post.



Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: perlquestion [id://939489]
Approved by Eliya
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (4)
As of 2018-03-20 04:29 GMT
Find Nodes?
    Voting Booth?
    When I think of a mole I think of:

    Results (247 votes). Check out past polls.