?
Solved

URGENT !! Files and Hexadecmial values

Posted on 2004-04-23
5
Medium Priority
?
250 Views
Last Modified: 2010-03-04
I would like to read any standard ascii file (wether it be a compiled program, image, or text file) and convert it to the actual 'Hex' value.

IE: --
Text string: My name is Slim ;)
# would convert to
Hex value: 4D-79-20-6E-61-6D-65-20-69-73-20-53-6C-69-6D-20-3B-29
# and back to ascii again


Is there any easy way to do this? Maybe a module from cpan, or even better, a built in module ?  I'm experimenting with Perl/Tk I want to make my own version of 'Notepad' because the WindowsXP version is annoying ;)

-- Austin
0
Comment
Question by:Teh_Craze
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 12

Expert Comment

by:stefan73
ID: 10900153
Hi Teh_Craze,
convert a byte value to hex:
$hexbyte = sprintf "%02x", $byte;

...and back:

$number = hex("f7");

Cheers,
Stefan
0
 
LVL 8

Expert Comment

by:davorg
ID: 10900223
Use "pack" and "unpack".

#!/usr/bin/perl
                                                                               
use strict;
use warnings;
                                                                               
my $txt = 'My name is Slim ;)';
                                                                               
my $hex = unpack 'H*', $txt;
                                                                               
print "$hex\n";
                                                                               
my $asc = pack 'H*', $hex;
                                                                               
print "$asc\n";


Dave...
0
 
LVL 12

Expert Comment

by:stefan73
ID: 10900342
Dave,

How to include the dashes in the hex output?

Stefan
0
 
LVL 8

Accepted Solution

by:
davorg earned 2000 total points
ID: 10900380
#!/usr/bin/perl
                                                                               
use strict;
use warnings;
                                                                               
my $txt = 'My name is Slim ;)';
                                                                               
my $hex = unpack 'H*', $txt;
                                                                               
print join '-', $hex =~ /(..)/g;
print "\n";
                                                                               
my $asc = pack 'H*', $hex;
                                                                               
print "$asc\n";
0
 

Author Comment

by:Teh_Craze
ID: 10906875
Brilliant 'davorg'. That was the exact thing I wanted. Thanks. ;)
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I have been pestered over the years to produce and distribute regular data extracts, and often the request have explicitly requested the data be emailed as an Excel attachement; specifically Excel, as it appears: CSV files confuse (no Red or Green h…
There are many situations when we need to display the data in sorted order. For example: Student details by name or by rank or by total marks etc. If you are working on data driven based projects then you will use sorting techniques very frequently.…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Six Sigma Control Plans
Suggested Courses

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question