NAME

       Crypt::Checksum - functional interface to CRC32 and Adler32 checksums

SYNOPSIS

          use Crypt::Checksum ':all';

          # calculate Adler32 checksum from string/buffer
          $checksum_raw  = adler32_data($data);
          $checksum_hex  = adler32_data_hex($data);

          # calculate Adler32 checksum from file
          $checksum_raw  = adler32_file('filename.dat');
          $checksum_hex  = adler32_file_hex('filename.dat');

          # calculate Adler32 checksum from filehandle
          $checksum_raw  = adler32_file(*FILEHANDLE);
          $checksum_hex  = adler32_file_hex(*FILEHANDLE);

          # calculate CRC32 checksum from string/buffer
          $checksum_raw  = crc32_data($data);
          $checksum_hex  = crc32_data_hex($data);

          # calculate CRC32 checksum from file
          $checksum_raw  = crc32_file('filename.dat');
          $checksum_hex  = crc32_file_hex('filename.dat');

          # calculate CRC32 checksum from filehandle
          $checksum_raw  = crc32_file(*FILEHANDLE);
          $checksum_hex  = crc32_file_hex(*FILEHANDLE);

DESCRIPTION

       Calculating CRC32 and Adler32 checksums (functional interface);

       Since: CryptX-0.032

EXPORT

       Nothing is exported by default.

       You can export selected functions:

         use Crypt::Checksum qw( adler32_data adler32_data_hex adler32_file adler32_file_hex
                                 crc32_data crc32_data_hex crc32_file crc32_file_hex );

       Or all of them at once:

         use Crypt::Checksum ':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_hex = adler32_data_int('data string');
        #or
        $checksum_hex = 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_hex = adler32_file_int('filename.dat');
        #or
        $checksum_hex = adler32_file_int(*FILEHANDLE);

   crc32_data
       Returns checksum as raw octects.

        $checksum_raw = crc32_data('data string');
        #or
        $checksum_raw = crc32_data('any data', 'more data', 'even more data');

   crc32_data_hex
       Returns checksum as a hexadecimal string.

        $checksum_hex = crc32_data_hex('data string');
        #or
        $checksum_hex = crc32_data_hex('any data', 'more data', 'even more data');

   crc32_data_int
       Returns checksum as unsigned 32bit integer.

        $checksum_hex = crc32_data_int('data string');
        #or
        $checksum_hex = crc32_data_int('any data', 'more data', 'even more data');

   crc32_file
       Returns checksum as raw octects.

        $checksum_raw = crc32_file('filename.dat');
        #or
        $checksum_raw = crc32_file(*FILEHANDLE);

   crc32_file_hex
       Returns checksum as a hexadecimal string.

        $checksum_hex = crc32_file_hex('filename.dat');
        #or
        $checksum_hex = crc32_file_hex(*FILEHANDLE);

   crc32_file_int
       Returns checksum as unsigned 32bit integer.

        $checksum_hex = crc32_file_int('filename.dat');
        #or
        $checksum_hex = crc32_file_int(*FILEHANDLE);

SEE ALSO

       •   CryptX, Crypt::Checksum::Adler32, Crypt::Checksum::CRC32

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

       •   <https://en.wikipedia.org/wiki/Cyclic_redundancy_check>