mirror of https://github.com/PCSX2/pcsx2.git
79 lines
3.3 KiB
C
79 lines
3.3 KiB
C
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/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2010 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Provides a map template which doesn't require heap allocations for lookups.
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*/
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#pragma once
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#include <map>
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#include <set>
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#include <string>
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#include <unordered_map>
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#include <unordered_set>
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namespace detail
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{
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struct transparent_string_hash
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{
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using is_transparent = void;
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std::size_t operator()(const std::string_view& v) const { return std::hash<std::string_view>{}(v); }
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std::size_t operator()(const std::string& s) const { return std::hash<std::string>{}(s); }
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std::size_t operator()(const char* s) const { return operator()(std::string_view(s)); }
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};
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struct transparent_string_equal
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{
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using is_transparent = void;
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bool operator()(const std::string& lhs, const std::string_view& rhs) const { return lhs == rhs; }
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bool operator()(const std::string& lhs, const std::string& rhs) const { return lhs == rhs; }
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bool operator()(const std::string& lhs, const char* rhs) const { return lhs == rhs; }
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bool operator()(const std::string_view& lhs, const std::string& rhs) const { return lhs == rhs; }
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bool operator()(const char* lhs, const std::string& rhs) const { return lhs == rhs; }
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};
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struct transparent_string_less
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{
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using is_transparent = void;
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bool operator()(const std::string& lhs, const std::string_view& rhs) const { return lhs < rhs; }
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bool operator()(const std::string& lhs, const std::string& rhs) const { return lhs < rhs; }
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bool operator()(const std::string& lhs, const char* rhs) const { return lhs < rhs; }
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bool operator()(const std::string_view& lhs, const std::string& rhs) const { return lhs < rhs; }
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bool operator()(const char* lhs, const std::string& rhs) const { return lhs < rhs; }
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};
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} // namespace detail
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template <typename ValueType>
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using UnorderedStringMap =
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std::unordered_map<std::string, ValueType, detail::transparent_string_hash, detail::transparent_string_equal>;
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template <typename ValueType>
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using UnorderedStringMultimap =
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std::unordered_multimap<std::string, ValueType, detail::transparent_string_hash, detail::transparent_string_equal>;
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using UnorderedStringSet =
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std::unordered_set<std::string, detail::transparent_string_hash, detail::transparent_string_equal>;
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using UnorderedStringMultiSet =
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std::unordered_multiset<std::string, detail::transparent_string_hash, detail::transparent_string_equal>;
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template <typename ValueType>
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using StringMap = std::map<std::string, ValueType, detail::transparent_string_less>;
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template <typename ValueType>
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using StringMultiMap = std::multimap<std::string, ValueType, detail::transparent_string_less>;
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using StringSet = std::set<std::string, detail::transparent_string_less>;
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using StringMultiSet = std::multiset<std::string, detail::transparent_string_less>;
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