Boolean Single Bistogram over file contents. If binHist0[cast(ubyte)x] is set then this file contains byte x. Consumes 32 bytes.
Boolean Pair Bistogram (Digram) over file contents (higher-order statistics). If this RegFile contains a sequence of [byte0, bytes1], then bit at index byte0 + byte1 * 256 is set in xgram.
Contents Statistics of a Regular File.