mirror of
https://github.com/dbalsom/x86_microcode.git
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Andrew Jenner
35 lines
1002 B
C++
35 lines
1002 B
C++
#include "alfe/main.h"
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#ifndef INCLUDED_HASH_H
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#define INCLUDED_HASH_H
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#include <typeinfo>
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class Hash
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{
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public:
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// FNV-1a hash
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Hash(const std::type_info& t) : _h(0x811c9dc5)
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{
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mixin(static_cast<UInt32>(t.hash_code()));
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}
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Hash& mixin(UInt8 v) { _h = (_h ^ v) * 0x01000193; return *this; }
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Hash& mixin(UInt16 v) { return mixin(static_cast<UInt8>(v)).mixin(static_cast<UInt8>(v >> 8)); }
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Hash& mixin(UInt32 v) { return mixin(static_cast<UInt16>(v)).mixin(static_cast<UInt16>(v >> 16)); }
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Hash& mixin(int v) { return mixin(static_cast<UInt32>(v)); }
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operator UInt32() const { return _h; }
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private:
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UInt32 _h;
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};
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template<class T> UInt32 hash(const T& t) { return t.hash(); }
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UInt32 hash(int t) { return Hash(typeid(int)).mixin(t); }
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UInt32 hash(DWord t) { return Hash(typeid(int)).mixin(t); }
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UInt32 hash(UInt64 t)
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{
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return Hash(typeid(UInt64)).mixin(static_cast<UInt32>(t)).
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mixin(static_cast<UInt32>(t >> 32));
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}
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#endif // INCLUDED_HASH_H
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