FNV1_64

function FNV1_64(

  const Buf;

  BufLen: SizeInt;

  hVal: Fnv64_t

):Fnv64_t;

function FNV1_64(

  const Buf: PByte;

  BufLen: SizeInt;

  hVal: Fnv64_t

):Fnv64_t;