Платформа ЦРНП "Мирокод" для разработки проектов
https://git.mirocod.ru
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54 lines
1.2 KiB
54 lines
1.2 KiB
// Copyright (c) 2017 Couchbase, Inc. |
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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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package regexp |
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type sparseSet struct { |
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dense []uint |
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sparse []uint |
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size uint |
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} |
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func newSparseSet(size uint) *sparseSet { |
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return &sparseSet{ |
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dense: make([]uint, size), |
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sparse: make([]uint, size), |
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size: 0, |
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} |
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} |
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func (s *sparseSet) Len() int { |
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return int(s.size) |
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} |
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func (s *sparseSet) Add(ip uint) uint { |
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i := s.size |
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s.dense[i] = ip |
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s.sparse[ip] = i |
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s.size++ |
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return i |
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} |
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func (s *sparseSet) Get(i uint) uint { |
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return s.dense[i] |
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} |
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func (s *sparseSet) Contains(ip uint) bool { |
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i := s.sparse[ip] |
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return i < s.size && s.dense[i] == ip |
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} |
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func (s *sparseSet) Clear() { |
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s.size = 0 |
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}
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