81 lines
1.8 KiB
C#
81 lines
1.8 KiB
C#
// -----------------------------------------------------------------------------
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// file="CapacityFixedBag"
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// Project: StgSharp
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// Copyright (c) Nitload.
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// SPDX-License-Identifier: MIT
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// -----------------------------------------------------------------------------
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Reflection;
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namespace StgSharp.Collections
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{
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public sealed class CapacityFixedBag<T> : IEnumerable<T>
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{
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private readonly T[] _buffer;
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public CapacityFixedBag(
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int capacity
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)
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{
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_buffer = new T[capacity];
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}
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public int Count { get; set; }
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public int Capacity => _buffer.Length;
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public void Add(
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T item
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)
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{
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if (Count >= _buffer.Length) {
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throw new InvalidOperationException("Bag capacity exceeded.");
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}
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_buffer[Count] = item;
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Count++;
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}
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public IEnumerator<T> GetEnumerator()
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{
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for (int i = 0; i < Count; i++) {
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yield return _buffer[i];
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}
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}
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public void Remove(
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T item
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)
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{
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int index = Array.IndexOf(_buffer, item, 0, Count);
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if (index >= 0)
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{
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_buffer[index] = _buffer[Count - 1];
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_buffer[Count - 1] = default!;
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Count--;
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}
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}
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public void RemoveAt(
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int index
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)
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{
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if (index >= 0)
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{
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_buffer[index] = _buffer[Count - 1];
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_buffer[Count - 1] = default!;
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Count--;
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}
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return GetEnumerator();
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}
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}
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}
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