void Init(int initialHashSize, int initialIndexSize)
{
Debug.Assert(MathX.IsPowerOfTwo(initialHashSize));
hashSize = initialHashSize;
hash = INVALID_INDEX;
indexSize = initialIndexSize;
indexChain = INVALID_INDEX;
granularity = DEFAULT_HASH_GRANULARITY;
hashMask = hashSize - 1;
lookupMask = 0;
}
unsafe void Allocate(int newHashSize, int newIndexSize)
{
Debug.Assert(MathX.IsPowerOfTwo(newHashSize));
Free();
hashSize = newHashSize;
hash = new int[hashSize];
fixed(void *hash_ = hash) Unsafe.InitBlock(hash_, 0xff, (uint)(hashSize * sizeof(int)));
indexSize = newIndexSize;
indexChain = new int[indexSize];
fixed(void *indexChain_ = indexChain) Unsafe.InitBlock(indexChain_, 0xff, (uint)(indexSize * sizeof(int)));
hashMask = hashSize - 1;
lookupMask = -1;
}