public class FSFnv1aInterleavedChecksumCalculator
extends java.lang.Object
A modification of FNV-1a algorithm. When given an input of 4k+b bytes
the first 4k bytes input is divided into 4 arrays:
of the 1st, 5th, 9th, 13th, ... bytes
of the 2nd, 6th, 10th, 14th, ... bytes
of the 3rd, 7th, 11th, 15th, ... bytes
of the 4th, 8th, 12th, 16th, ... bytes
Then 4 normal FNV-1a checksums are calculated from them.
Then the checksums are written as raw a byte array and the last b bytes
are appended.
Finally normal FNV-1a checksum is calculated.