bbradson
88 lines
1.8 KiB
C#
88 lines
1.8 KiB
C#
// Copyright (c) 2022 bradson
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v.2.0.If a copy of the MPL was not distributed with this
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// file, You can obtain one at https://mozilla.org/MPL/2.0/.
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using System.Runtime.CompilerServices;
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using JetBrains.Annotations;
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namespace FisheryLib;
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#pragma warning disable CS9081, CS9080
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[PublicAPI]
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public unsafe ref struct StackList<T> where T : unmanaged
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{
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public const int MAX_LENGTH = 1024;
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private Span<T> _span;
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public int Count
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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get;
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private set;
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}
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public T this[int index]
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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get
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{
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Guard.IsLessThan(index, Count);
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return _span[index];
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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set
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{
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Guard.IsLessThan(index, Count);
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_span[index] = value;
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}
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}
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public void Add(T value)
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{
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if (++Count >= _span.Length)
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Expand();
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_span[Count - 1] = value;
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}
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private void Expand()
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{
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var newLength = _span.Length * 2;
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var newSpan = newLength > MAX_LENGTH ? new T[newLength] : stackalloc T[newLength];
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_span.CopyTo(newSpan);
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_span = newSpan;
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}
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public void RemoveAt(int index)
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{
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Guard.IsLessThan(index, Count);
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Count--;
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if (index == Count)
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return;
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_span[index..Count].CopyTo(_span);
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}
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public T[] ToArray()
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{
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var array = new T[Count];
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_span[..Count].CopyTo(array);
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return array;
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}
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public List<T> ToList()
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{
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var list = new List<T>(Count);
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_span[..Count].CopyTo(list._items);
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return list;
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}
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public StackList() => _span = stackalloc T[4];
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public StackList(int capacity) => _span = capacity > MAX_LENGTH ? new T[capacity] : stackalloc T[capacity];
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}
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#pragma warning restore CS9081 |