44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
#pragma once
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#include <string_view>
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#include <locale>
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#include <unordered_map>
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#include "utility.h"
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namespace crow
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{
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/// Hashing function for ci_map (unordered_multimap).
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struct ci_hash
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{
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size_t operator()(const std::string_view key) const
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{
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std::size_t seed = 0;
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std::locale locale;
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for (auto c : key)
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hash_combine(seed, std::toupper(c, locale));
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return seed;
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}
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private:
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static inline void hash_combine(std::size_t& seed, char v)
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{
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std::hash<char> hasher;
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seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
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}
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};
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/// Equals function for ci_map (unordered_multimap).
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struct ci_key_eq
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{
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bool operator()(const std::string_view l, const std::string_view r) const
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{
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return utility::string_equals(l, r);
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}
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};
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using ci_map = std::unordered_multimap<std::string, std::string, ci_hash, ci_key_eq>;
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} // namespace crow
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