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added staticHashDunction

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This commit is contained in:
Andrei Yankovich 2020-05-22 22:34:06 +03:00
parent 05254ad0cd
commit a4734f877f
1 changed files with 45 additions and 0 deletions
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45
global.h
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@ -80,4 +80,49 @@ constexpr uint32_t static_hash(const char* str) {
return hash; return hash;
} }
template<class T, class Hash>
/**
* @brief static_type_hash_base
* @return hash of type (on compiller time)
*/
constexpr Hash static_type_hash_base() {
auto name = typeid(T).name();
Hash hash = 0;
unsigned char index = 0;
Hash tmp = 1;
while (name[index] && index < 0xff) {
tmp *= name[index];
if (index % sizeof(Hash) == 0) {
hash = hash % name[index];
tmp = 1;
}
}
return hash;
}
template<class T>
constexpr uint64_t static_type_hash_64() {
return static_type_hash_base<T, uint64_t>();
};
template<class T>
constexpr uint32_t static_type_hash_32() {
return static_type_hash_base<T, uint32_t>();
};
template<class T>
constexpr uint16_t static_type_hash_16() {
return static_type_hash_base<T, uint16_t>();
};
template<class T>
constexpr unsigned char static_type_hash_8() {
return static_type_hash_base<T, unsigned char>();
};
#endif // GLOBAL_H #endif // GLOBAL_H