| using Lucene.Net.Support; |
| using System.Runtime.CompilerServices; |
| |
| namespace Lucene.Net.Util |
| { |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /// <summary> |
| /// Interface for Bitset-like structures. |
| /// <para/> |
| /// @lucene.experimental |
| /// </summary> |
| public interface IBits |
| { |
| /// <summary> |
| /// Returns the value of the bit with the specified <paramref name="index"/>. |
| /// </summary> |
| /// <param name="index"> Index, should be non-negative and < <see cref="Length"/>. |
| /// The result of passing negative or out of bounds values is undefined |
| /// by this interface, <b>just don't do it!</b> </param> |
| /// <returns> <c>true</c> if the bit is set, <c>false</c> otherwise. </returns> |
| bool Get(int index); |
| |
| /// <summary> |
| /// Returns the number of bits in this set </summary> |
| int Length { get; } |
| } |
| |
| public static class Bits |
| { |
| public static readonly IBits[] EMPTY_ARRAY = Arrays.Empty<IBits>(); |
| |
| /// <summary> |
| /// Bits impl of the specified length with all bits set. |
| /// </summary> |
| public class MatchAllBits : IBits |
| { |
| private readonly int _len; |
| |
| public MatchAllBits(int len) |
| { |
| _len = len; |
| } |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| public bool Get(int index) |
| { |
| return true; |
| } |
| |
| public int Length => _len; |
| } |
| |
| /// <summary> |
| /// Bits impl of the specified length with no bits set. |
| /// </summary> |
| public class MatchNoBits : IBits |
| { |
| private readonly int _len; |
| |
| public MatchNoBits(int len) |
| { |
| _len = len; |
| } |
| |
| [MethodImpl(MethodImplOptions.AggressiveInlining)] |
| public bool Get(int index) |
| { |
| return false; |
| } |
| |
| public int Length => _len; |
| } |
| } |
| } |