CRC_ITU_T(9) Basic Kernel Library Functions CRC_ITU_T(9)NAME
crc_itu_t - Compute the CRC-ITU-T for the data buffer
SYNOPSIS
u16 crc_itu_t(u16 crc, const u8 * buffer, size_t len);
ARGUMENTS
crc
previous CRC value
buffer
data pointer
len
number of bytes in the buffer
DESCRIPTION
Returns the updated CRC value
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 CRC_ITU_T(9)
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CRC32(3) User Contributed Perl Documentation CRC32(3)NAME
String::CRC32 - Perl interface for cyclic redundency check generation
SYNOPSIS
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);
DESCRIPTION
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.
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(SOMEFILE, "location/of/some.file");
$crc = crc32(*SOMEFILE);
close(SOMEFILE);
A init value may also been supplied in the above example.
AUTHOR
Soenke J. Peters <peters__perl@opcenter.de>
Please be so kind as to report any bugs/suggestions to the above address.
COPYRIGHT
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 v5.16.3 2005-04-04 CRC32(3)