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GNU/Linux |
CentOS 5.1 |
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String::CRC32(3pm) |
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String::CRC32 − Perl interface for cyclic redundency check generation
use String::CRC32;
$crc = crc32("some string");
$crc = crc32("some string", initvalue);
$somestring = "some string";
$crc = crc32($somestring);
open(SOMEFILE, "location/of/some.file");
$crc = crc32(*SOMEFILE);
close(SOMEFILE);
The CRC32 module calculates CRC sums of 32 bit lenghts. 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.
$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(SOMEFILE, "location/of/some.file");
$crc = crc32(*SOMEFILE);
close(SOMEFILE);
A init value may also been supplied in the above example.
Soenke J. Peters <peters__perl@opcenter.de>
Please be so kind as to report any bugs/suggestions to the above address.
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.
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String::CRC32(3pm) | |