CRC32(3pm) User Contributed Perl Documentation CRC32(3pm)
NAME
String::CRC32 - Perl interface for cyclic redundancy check generation
SYNOPSIS
use String::CRC32;
$crc = crc32("some string");
$crc = crc32("some string", initvalue);
$somestring = "some string";
$crc = crc32($somestring);
printf "%08x\n", $crc;
open my $fh, '<', 'location/of/some.file' or die $!;
binmode $fh;
$crc = crc32($fh);
close $fh;
DESCRIPTION
The CRC32 module calculates CRC sums of 32 bit lengths as integers. It
generates the same CRC values as ZMODEM, PKZIP, PICCHECK and many
others.
Despite its name, this module is able to compute the checksum of files
as well as strings.
EXAMPLES
$crc = crc32("some string");
results in the same as
$crc = crc32(" string", crc32("some"));
This is useful for subsequent CRC checking of substrings.
You may even check files:
open my $fh, '<', 'location/of/some.file' or die $!;
binmode $fh;
$crc = crc32($fh);
close $fh;
A init value may also have been supplied in the above example.
AUTHOR
Soenke J. Peters <peters__perl@opcenter.de>
Current maintainer: LEEJO
Address bug reports and comments to:
<https://github.com/leejo/string-crc32/issues>
LICENSE
CRC algorithm code taken from CRC-32 by Craig Bruce. The module stuff
is inspired by a similar perl module called String::CRC by David
Sharnoff & Matthew Dillon. Horst Fickenscher told me that it could be
useful to supply an init value to the crc checking function and so I
included this possibility.
The author of this package disclaims all copyrights and releases it
into the public domain.
perl v5.36.0 2022-10-22 CRC32(3pm)
Generated by dwww version 1.15 on Thu Jun 20 14:04:08 CEST 2024.