Provided by: libswiss-perl_1.67-1_all bug

CRC64 perl module documentation

       CRC64 - Calculate the cyclic redundancy check.

          use SWISS::CRC64;

          $crc = SWISS::CRC64::crc64("IHATEMATH");
          #returns the string "E3DCADD69B01ADD1"

          ($crc_low, $crc_high) = SWISS::CRC64::crc64("IHATEMATH");
          #returns two 32-bit unsigned integers, 3822890454 and 2600578513

       SWISS-PROT + TREMBL use a 64-bit Cyclic Redundancy Check for the amino acid sequences.

       The algorithm to compute the CRC is described in the ISO 3309 standard.  The generator
       polynomial is x64 + x4 + x3 + x + 1.  Reference: W. H. Press, S. A. Teukolsky, W. T.
       Vetterling, and B. P.  Flannery, "Numerical recipes in C", 2nd ed., Cambridge University
       Press. Pages 896ff.

       crc64 string
           Calculate the CRC64 (cyclic redundancy checksum) for string.

           In array context, returns two integers equal to the higher and lower 32 bits of the
           CRC64. In scalar context, returns a 16-character string containing the CRC64 in
           hexadecimal format.


       Alexandre Gattiker,


       Based on SPcrc, a C implementation by Christian Iseli, available at