Returns (as a scalar long) the checksum of the specified byte string using the specified algorithm.
$ checksum($handle, '[>]algorithm')Sets up the specified handle so that all reads (or if the algorithm is prefixed with >, writes) are checksummed using the specified algorithm. Returns a $checksum object that can be used to obtain the final digest value.
$ checksum($checksum)Returns (as a scalar long) the checksum of the handle associated with $checksum.
"string" - a string of bytes to checksum the data from
$handle - the I/O handle to attach a checksum object to.
$checksum - an object scalar referencing a checksum object.
'algorithm' -
the algorithm to use when checksumming the data.
Algorithm Description Adler32 Adler-32 Checksum Algorithm; faster than CRC32, less reliable CRC32 Cyclid Redundancy Check Algorithm
This is dependent on the form used. The checksum values themselves are all scalar longs.
# generate a CRC32 sum from any file. sub crc32 { $handle = openf($1); $digest = checksum($handle, "CRC32"); # consume the handle skip($handle, lof($1)); closef($handle); $result = checksum($digest); println(formatNumber($result, 10, 16)); } crc32(@ARGV[0]);
$ java -jar sleep.jar checksum.sl checksum.sl 29452c1b $ crc32 checksum.sl 29452c1b