68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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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_set>
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#include <unordered_map>
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#include <boost/algorithm/string/case_conv.hpp> // to_lower_copy
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namespace doris {
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struct StringCaseHasher {
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public:
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std::size_t operator()(const std::string& value) const {
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std::string lower_value = boost::algorithm::to_lower_copy(value);
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return std::hash<std::string>()(lower_value);
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}
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};
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struct StringCaseEqual {
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public:
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bool operator()(const std::string& lhs, const std::string& rhs) const {
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if (lhs.size() != rhs.size()) {
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return false;
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}
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return strncasecmp(lhs.c_str(), rhs.c_str(), 0) == 0;
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}
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};
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struct StringCaseLess {
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public:
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bool operator()(const std::string& lhs, const std::string& rhs) const {
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size_t common_size = std::min(lhs.size(), rhs.size());
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auto cmp = strncasecmp(lhs.c_str(), rhs.c_str(), common_size);
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if (cmp == 0) {
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return lhs.size() < rhs.size();
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}
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return cmp < 0;
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}
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};
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using StringCaseSet = std::set<std::string, StringCaseLess>;
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using StringCaseUnorderedSet = std::unordered_set<std::string, StringCaseHasher, StringCaseEqual>;
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template<class T>
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using StringCaseMap = std::map<std::string, T, StringCaseLess>;
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template<class T>
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using StringCaseUnorderedMap = std::unordered_map<std::string, T, StringCaseHasher, StringCaseEqual>;
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}
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