static void Main(string[] args)
{
var h = new MurmurHash3_x64_128();
var x = VerificationTest(h, 128, 0x6384BA69, true); // For MurmurHash3_x64_128
//var x = VerificationTest(h, 32, 0xB0F57EE3, true); // For MurmurHash3_x86_32
}
private static bool VerificationTest(MurmurHash3_x64_128 hash, int hashbits, UInt32 expected, bool verbose)
{
int hashbytes = hashbits / 8;
byte[] key = new byte[256];
byte[] hashes = new byte[hashbytes * 256];
// Hash keys of the form {0}, {0,1}, {0,1,2}... up to N=255,using 256-N as
// the seed
for (int i = 0; i < 256; i++)
{
key[i] = (byte)i;
hash.Seed = (uint)(256 - i);
var ret = hash.ComputeHash(key, 0, i);
Array.Copy(ret, 0, hashes, i * hashbytes, hashbytes);
}
// Then hash the result array
hash.Seed = 0;
var final = hash.ComputeHash(hashes, 0, hashbytes * 256);
// The first four bytes of that hash, interpreted as a little-endian integer, is our
// verification value
UInt32 verification = (UInt32)((final[0] << 0) | (final[1] << 8) | (final[2] << 16) | (final[3] << 24));
//----------
if (expected != verification)
{
if (verbose)
{
Console.WriteLine("Verification value {0} : Failed! (Expected {1})", verification, expected);
}
return false;
}
else
{
if (verbose)
{
Console.WriteLine("Verification value {0} : Passed!", verification);
}
return true;
}
}
