73 lines
1.4 KiB
C#
73 lines
1.4 KiB
C#
using System;
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using System.Collections.Generic;
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namespace MoonTools.ECS
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{
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public struct FilterSignature : IEquatable<FilterSignature>
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{
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public readonly HashSet<int> Included;
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public readonly HashSet<int> Excluded;
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public FilterSignature(HashSet<int> included, HashSet<int> excluded)
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{
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Included = included;
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Excluded = excluded;
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}
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public override bool Equals(object? obj)
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{
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return obj is FilterSignature signature && Equals(signature);
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}
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public bool Equals(FilterSignature other)
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{
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// workaround for HashSet<T>.SetEquals generating garbage
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// maybe fixed in .NET 8?
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foreach (var included in Included)
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{
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if (!other.Included.Contains(included))
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{
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return false;
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}
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}
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foreach (var excluded in Excluded)
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{
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if (!other.Excluded.Contains(excluded))
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{
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return false;
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}
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}
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return true;
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}
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public override int GetHashCode()
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{
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var hashcode = 1;
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foreach (var type in Included)
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{
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hashcode = HashCode.Combine(hashcode, type);
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}
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foreach (var type in Excluded)
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{
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hashcode = HashCode.Combine(hashcode, type);
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}
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return hashcode;
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}
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public static bool operator ==(FilterSignature left, FilterSignature right)
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{
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return left.Equals(right);
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}
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public static bool operator !=(FilterSignature left, FilterSignature right)
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{
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return !(left == right);
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}
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}
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}
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