mirror of https://gitee.com/bigwinds/arangodb
68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2019 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// 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, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Andrey Abramov
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/// @author Vasiliy Nabatchikov
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_IRESEARCH__IRESEARCH_VPACK_COMPARER_H
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#define ARANGODB_IRESEARCH__IRESEARCH_VPACK_COMPARER_H 1
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#include "IResearchViewSort.h"
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#include "index/comparer.hpp"
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#include "utils/string.hpp"
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namespace arangodb {
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namespace iresearch {
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class VPackComparer final : public irs::comparer {
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public:
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VPackComparer();
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explicit VPackComparer(IResearchViewSort const& sort) noexcept
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: _sort(&sort), _size(sort.size()) {
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}
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VPackComparer(IResearchViewSort const& sort, size_t size) noexcept
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: _sort(&sort), _size(std::min(sort.size(), size)) {
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}
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void reset(IResearchViewSort const& sort) noexcept {
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_sort = &sort;
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_size = sort.size();
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}
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bool empty() const noexcept {
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return 0 == _size;
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}
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protected:
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virtual bool less(irs::bytes_ref const& lhs,
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irs::bytes_ref const& rhs) const override;
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private:
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IResearchViewSort const* _sort;
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size_t _size; // number of buckets to compare
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}; // VPackComparer
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} // iresearch
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} // arangodb
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#endif // ARANGODB_IRESEARCH__IRESEARCH_VPACK_COMPARER_H
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