087b7e7abf
This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.
This reverts commit a9be52c41a.
82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
#pragma once
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#include <cstdint>
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// Java doesn't have a default hash value for ints, however, the hashmap itself does some "supplemental" hashing, so
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// our ints actually get hashed by code as implemented below. std templates *do* have a standard hash for ints, but it
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// would appear to be a bit expensive so matching the java one for now anyway. This code implements the supplemental
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// hashing that happens in java so we can match what their maps are doing with ints.
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struct IntKeyHash
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{
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inline int operator()(const int &k) const
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{
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int h = k;
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h += ~(h << 9);
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h ^= (((unsigned int)h) >> 14);
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h += (h << 4);
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h ^= (((unsigned int)h) >> 10);
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return h;
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}
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};
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struct IntKeyEq
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{
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inline bool operator()(const int &x, const int &y) const
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{ return x==y; }
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};
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// This hash functor is taken from the IntHashMap java class used by the game, so that we can use a standard std hashmap with this hash rather
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// than implement the class itself
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struct IntKeyHash2
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{
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inline int operator()(const int &k) const
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{
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unsigned int h = static_cast<unsigned int>(k);
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h ^= (h >> 20) ^ (h >> 12);
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return static_cast<int>(h ^ (h >> 7) ^ (h >> 4));
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}
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};
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// This hash functor is taken from the LongHashMap java class used by the game, so that we can use a standard std hashmap with this hash rather
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// than implement the class itself
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struct LongKeyHash
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{
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inline int hash(const int &k) const
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{
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unsigned int h = static_cast<unsigned int>(k);
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h ^= (h >> 20) ^ (h >> 12);
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return static_cast<int>(h ^ (h >> 7) ^ (h >> 4));
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}
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inline int operator()(const int64_t &k) const
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{
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return hash(static_cast<int>(k ^ ((static_cast<uint64_t>(k)) >> 32)));
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}
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};
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struct LongKeyEq
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{
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inline bool operator() (const int64_t &x, const int64_t &y) const
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{ return x == y; }
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};
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enum eINSTANCEOF;
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struct eINSTANCEOFKeyHash
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{
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int operator()(const eINSTANCEOF &k) const
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{
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unsigned int h = static_cast<unsigned int>(k);
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h ^= (h >> 20) ^ (h >> 12);
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return static_cast<int>(h ^ (h >> 7) ^ (h >> 4));
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}
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};
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struct eINSTANCEOFKeyEq
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{
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inline bool operator()(const eINSTANCEOF &x, const eINSTANCEOF &y) const
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{ return x == y; }
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};
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