////  DoubleHashKey.h//  libraries/shared/src////  Created by Andrew Meadows 2014.11.02//  Copyright 2014 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #ifndef hifi_DoubleHashKey_h#define hifi_DoubleHashKey_h #include <stdint.h> // DoubleHashKey for use with btHashMapclass DoubleHashKey {public:    static uint32_t hashFunction(uint32_t value, uint32_t primeIndex);    static uint32_t hashFunction2(uint32_t value);     DoubleHashKey() : _hash(0), _hash2(0) { }     DoubleHashKey(uint32_t value, uint32_t primeIndex = 0) :         _hash(hashFunction(value, primeIndex)),         _hash2(hashFunction2(value)) {     }     void clear() { _hash = 0; _hash2 = 0; }    bool isNull() const { return _hash == 0 && _hash2 == 0; }     bool equals(const DoubleHashKey& other) const {        return _hash == other._hash && _hash2 == other._hash2;    }     void computeHash(uint32_t value, uint32_t primeIndex = 0);    uint32_t getHash() const { return _hash; }    uint32_t getHash2() const { return _hash2; }     void setHash(uint32_t hash) { _hash = hash; }    void setHash2(uint32_t hash2) { _hash2 = hash2; } private:    uint32_t _hash;    uint32_t _hash2;}; #endif // hifi_DoubleHashKey_h