Hello, I was hoping someone could point me in the right direction/help me out with the following problem. I have the following code shown below. 
#!/usr/bin/perl
use strict;
use warnings;

my $input_string = 'test';
my $hexchars = '';

foreach my $chars (split(//,$input_string)) {
    $hexchars .= sprintf "%x", ord($chars);
}
print "$input_string\n";
print "$hexchars\n";

my $length = length $hexchars;
my $start = 0;
my $end = $start + $length;

print "length $length\n";
print "start_offset: $start\n";
print "end_offset: $end\n";

for ( $start = 0; $start < $length; $start ++ ) {
    print $start, "\n";
}

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What I am trying to do is process the output of the $hexchars variable but doing so 4 bytes at a time until no more data is left in the $hexchars variable. I am trying to reverse/swap two bytes from the 4 bytes that I am processing at a time. Example: the string "test" which I have in the input variable gets converted to: 74657374 in HEX. Now what I am trying to do is grab 4 bytes so in this case 7465 and swap/reverse them so they show up as so 6574. Then continue on to the next 4 characters and do the same until the variable is empty. Where I am having trouble is how to I process 4 characters at a time? Thanks for the help in advance.

In reply to Process a set num of characters at a time by learningperl01

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