Crypt::Checksum::Adler32 - Compute Adler32 checksum

NAME  SYNOPSIS  DESCRIPTION  EXPORT  FUNCTIONS  adler32_data  adler32_data_hex  adler32_data_int  adler32_file  adler32_file_hex  adler32_file_int  METHODS  new  clone  reset  add  addfile  digest  hexdigest  intdigest  SEE ALSO 

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NAME

Crypt::Checksum::Adler32 − Compute Adler32 checksum

SYNOPSIS

### Functional interface:
use Crypt::Checksum::Adler32 ':all';
# calculate Adler32 checksum from string/buffer
$checksum_raw = adler32_data($data);
$checksum_hex = adler32_data_hex($data);
$checksum_int = adler32_data_int($data);
# calculate Adler32 checksum from file
$checksum_raw = adler32_file('filename.dat');
$checksum_hex = adler32_file_hex('filename.dat');
$checksum_int = adler32_file_int('filename.dat');
# calculate Adler32 checksum from filehandle
$checksum_raw = adler32_file(*FILEHANDLE);
$checksum_hex = adler32_file_hex(*FILEHANDLE);
$checksum_int = adler32_file_int(*FILEHANDLE);
### OO interface:
use Crypt::Checksum::Adler32;
$d = Crypt::Checksum::Adler32−>new;
$d−>add('any data');
$d−>add('another data');
$d−>addfile('filename.dat');
$d−>addfile(*FILEHANDLE);
$checksum_raw = $d−>digest; # raw 4 bytes
$checksum_hex = $d−>hexdigest; # hexadecimal form
$checksum_int = $d−>intdigest; # 32bit unsigned integer

DESCRIPTION

Calculating Adler32 checksums.

Updated: v0.057

EXPORT

Nothing is exported by default.

You can export selected functions:

use Crypt::Checksum::Adler32 qw(adler32_data adler32_data_hex adler32_data_int adler32_file adler32_file_hex adler32_file_int);

Or all of them at once:

use Crypt::Checksum::Adler32 ':all';

FUNCTIONS

adler32_data

Returns checksum as raw octects.

$checksum_raw = adler32_data('data string');
#or
$checksum_raw = adler32_data('any data', 'more data', 'even more data');

adler32_data_hex

Returns checksum as a hexadecimal string.

$checksum_hex = adler32_data_hex('data string');
#or
$checksum_hex = adler32_data_hex('any data', 'more data', 'even more data');

adler32_data_int

Returns checksum as unsigned 32bit integer.

$checksum_int = adler32_data_int('data string');
#or
$checksum_int = adler32_data_int('any data', 'more data', 'even more data');

adler32_file

Returns checksum as raw octects.

$checksum_raw = adler32_file('filename.dat');
#or
$checksum_raw = adler32_file(*FILEHANDLE);

adler32_file_hex

Returns checksum as a hexadecimal string.

$checksum_hex = adler32_file_hex('filename.dat');
#or
$checksum_hex = adler32_file_hex(*FILEHANDLE);

adler32_file_int

Returns checksum as unsigned 32bit integer.

$checksum_int = adler32_file_int('filename.dat');
#or
$checksum_int = adler32_file_int(*FILEHANDLE);

METHODS

new

Constructor, returns a reference to the checksum object.

$d = Crypt::Checksum::Adler32−>new;

clone

Creates a copy of the checksum object state and returns a reference to the copy.

$d−>clone();

reset

Reinitialize the checksum object state and returns a reference to the checksum object.

$d−>reset();

add

All arguments are appended to the message we calculate checksum for. The return value is the checksum object itself.

$d−>add('any data');
#or
$d−>add('any data', 'more data', 'even more data');

addfile

The content of the file (or filehandle) is appended to the message we calculate checksum for. The return value is the checksum object itself.

$d−>addfile('filename.dat');
#or
$d−>addfile(*FILEHANDLE);

BEWARE: You have to make sure that the filehandle is in binary mode before you pass it as argument to the addfile() method.

digest

Returns the binary checksum (raw bytes).

$result_raw = $d−>digest();

hexdigest

Returns the checksum encoded as a hexadecimal string.

$result_hex = $d−>hexdigest();

intdigest

Returns the checksum encoded as unsigned 32bit integer.

$result_int = $d−>intdigest();

SEE ALSO

	•		CryptX
	•		<https://en.wikipedia.org/wiki/Adler−32>

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