Our Hash code in Perl.
Hash Class File:
package HASHES;
BEGIN {
require Exporter;
# for the sake of standard
our $VERSION = 2017.10;
# Inherit from exporter to export functions and variables
our @ISA = qw(Exporter);
# Functions and variables to be exported by default
our @EXPORT_OK = qw(encodeWord);
}
use warnings;
use strict;
use bigint;
# simulate an object construct
sub new {
my $self = shift;
my $this = {};
bless $this, $self;
return $this;
}
sub hashWord {
shift;
my $msg = shift;
# encoding eqn { Tn = (n-2)t1 + 2^n } - please use your own eqn
my $hashed;
my $n;
my $t1;
my $x;
for (0 .. $#{$msg}) {
# get unicode of this character as n
$n = ord($msg->[$_]);
$t1 = $_ + 1;
# use recurrence series equation to hash
$x = ($n - 2) * $t1 + 2**$n;
if ($_ == 0) {
$hashed = $x;
next;
}
# bitwise rotate left with the modulo of x
my $binary = substr ($hashed->as_bin(), 2); # remove binary designator('0b')
$x %= length $binary;
my @slice_1 = split (//, substr($binary, $x));
# keep as '1' to preserve hash size
$slice_1[0] = "1";
my $slice_2 = substr ($binary, 0, $x);
$hashed = join("", @slice_1) . $slice_2;
$hashed = Math::BigInt->from_bin($hashed);
}
$hashed = substr ($hashed->as_hex(), 2); # remove hex designator('0x')
$hashed = uc $hashed;
return $hashed;
}
1;Main Class:
#!/usr/bin/perl;
use strict;
use warnings;
use HASHES;
my @message = split(//, "merry xmas");
my $one_way = HASHES->new();
my $hashed = $one_way->hashWord(\@message);
print("Message is '", join("", @message), "';\nMessage hash is ", $hashed);
print "\n\n";Try it out!
Elegance (0.0)
