bbradson
835 lines
24 KiB
C#
835 lines
24 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.Collections;
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using System.Diagnostics.CodeAnalysis;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Text;
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using FisheryLib.Collections;
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using JetBrains.Annotations;
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namespace FisheryLib;
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[PublicAPI]
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public static class CollectionExtensions
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{
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public static bool TryGetItem<T>(this List<T> list, int index, [NotNullWhen(true)] out T? item)
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{
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if (list._size > index)
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{
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item = list._items[index]!;
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return true;
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}
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item = default;
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return false;
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}
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/// <summary>
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/// Taken from Span.this[] and slower than List.this[] due to the ArrayAdjustment
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/// </summary>
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internal static T GetItemUnchecked<T>(this List<T> list, int index)
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=> Unsafe.Add(
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ref Unsafe.AddByteOffset(ref Unsafe.As<Pinnable<T>>(list._items).Data, PerTypeValues<T>.ArrayAdjustment),
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index)!;
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[StructLayout(LayoutKind.Sequential)]
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private sealed class Pinnable<T>
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{
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public T? Data;
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}
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private static class PerTypeValues<T>
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{
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public static readonly IntPtr ArrayAdjustment = MeasureArrayAdjustment();
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private static IntPtr MeasureArrayAdjustment()
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{
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var array = new T[1];
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return Unsafe.ByteOffset(ref Unsafe.As<Pinnable<T>>(array).Data!, ref array[0]);
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}
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}
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public static bool TryGetItem<T>(this T[] array, int index, out T? item)
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{
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if (array.Length > index)
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{
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item = array[index];
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return true;
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}
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item = default;
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return false;
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}
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public static T[] ToArray<T>(this IEnumerable<T> enumerable, int length)
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{
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var array = new T[length];
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if (enumerable is IList<T> iList)
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array.Fill(iList);
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else
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array.FillUsingEnumerable(enumerable);
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return array;
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}
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public static Telement[] ToArray<Tenumerable, Telement>(this Tenumerable enumerable, Telement[] destination)
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where Tenumerable : IList<Telement>
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{
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Guard.IsNotNull(destination);
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destination.Fill(enumerable);
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return destination;
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}
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public static T[] ToArray<T>(this IEnumerable<T> enumerable, T[] destination)
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{
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Guard.IsNotNull(destination);
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if (enumerable is IList<T> iList)
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destination.Fill(iList);
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else
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destination.FillUsingEnumerable(enumerable);
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return destination;
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}
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private static void FillUsingEnumerable<T>(this T[] array, IEnumerable<T> enumerable, int startIndex = 0,
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int count = -1)
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{
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var i = 0u;
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foreach (var item in enumerable)
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{
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if (i >= (uint)count || startIndex >= array.Length)
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break;
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array[startIndex++] = item;
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i++;
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}
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}
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public static void Fill<Telement, Tcollection>(this Telement[] array, Tcollection collection, int startIndex = 0,
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int count = -1)
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where Tcollection : IList<Telement>
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{
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Guard.IsNotNull(collection);
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if (count <= 0)
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count = collection.Count;
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if (count <= array.Length - startIndex)
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{
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collection.CopyTo(array, startIndex);
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return;
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}
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for (var listIndex = 0; listIndex < count && startIndex < array.Length; startIndex++, listIndex++)
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array[startIndex] = collection[listIndex];
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}
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public static void Fill<T>(this T[] array, IEnumerable<T> enumerable, int startIndex = 0, int count = -1)
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{
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Guard.IsNotNull(enumerable);
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if (enumerable is IList<T> iList)
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array.Fill(iList, startIndex, count);
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else
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array.FillUsingEnumerable(enumerable, startIndex, count);
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}
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public static ref TValue GetReference<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, TKey key)
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{
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if (dictionary.buckets != null)
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{
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var keyCode = HashCode.Get(key) & int.MaxValue;
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// HashCode.Get can handle null, & int.MaxValue removes any sign
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && entry.key.Equals<TKey>(key))
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return ref entry.value;
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bucket = entry.next;
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}
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}
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return ref ThrowKeyNotFoundException<TKey, TValue>(key);
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}
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public static ref TValue GetReference<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, ref TKey key)
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{
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if (dictionary.buckets != null)
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{
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var keyCode = HashCode.Get(ref key) & int.MaxValue;
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && Equality.EqualsByRef(ref entry.key, ref key))
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return ref entry.value;
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bucket = entry.next;
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}
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}
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return ref ThrowKeyNotFoundException<TKey, TValue>(key);
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}
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/// <summary>
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/// Returns a reference to the value field of an entry if the key exists and an Unsafe.NullRef{TValue} if not.
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/// Must be checked with Unsafe.IsNullRef before assigning to a regular var or field without ref.
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/// </summary>
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/// <param name="dictionary">The instance</param>
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/// <param name="key">The key</param>
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/// <returns>ref TValue or Unsafe.NullRef{TValue}</returns>
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public static ref TValue TryGetReferenceUnsafe<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, TKey key)
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{
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if (dictionary.buckets != null)
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{
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var keyCode = HashCode.Get(key) & int.MaxValue;
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && entry.key.Equals<TKey>(key))
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return ref entry.value;
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bucket = entry.next;
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}
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}
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return ref Unsafe.NullRef<TValue>();
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}
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public static ref TValue TryGetReferenceUnsafe<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, ref TKey key)
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{
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if (dictionary.buckets != null)
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{
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var keyCode = HashCode.Get(ref key) & int.MaxValue;
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && Equality.EqualsByRef(ref entry.key, ref key))
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return ref entry.value;
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bucket = entry.next;
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}
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}
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return ref Unsafe.NullRef<TValue>();
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}
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public static TValue? TryGetValue<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, ref TKey key)
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{
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if (dictionary.buckets != null)
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{
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var keyCode = HashCode.Get(ref key) & int.MaxValue;
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && Equality.EqualsByRef(ref entry.key, ref key))
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return entry.value;
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bucket = entry.next;
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}
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}
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return default;
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}
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[return: MaybeNull]
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public static TValue TryGetValue<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, TKey key)
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{
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if (dictionary.buckets != null)
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{
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var keyCode = HashCode.Get(key) & int.MaxValue;
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && entry.key.Equals<TKey>(key))
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return entry.value;
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bucket = entry.next;
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}
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}
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return default;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static ref TValue GetOrAddReference<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, TKey key)
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where TValue : new()
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{
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var keyCode = HashCode.Get(key) & int.MaxValue;
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StartOfLookup:
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if (dictionary.buckets != null)
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{
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && entry.key.Equals<TKey>(key))
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return ref entry.value;
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bucket = entry.next;
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}
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}
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dictionary.Add(key, Reflection.New<TValue>());
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goto StartOfLookup;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static ref TValue GetOrAddReference<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, ref TKey key)
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where TValue : new()
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{
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var keyCode = HashCode.Get(ref key) & int.MaxValue;
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StartOfLookup:
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if (dictionary.buckets != null)
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{
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && Equality.EqualsByRef(ref entry.key, ref key))
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return ref entry.value;
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bucket = entry.next;
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}
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}
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dictionary.Add(key, Reflection.New<TValue>());
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goto StartOfLookup;
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}
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// public static bool TryGetOrAddReference<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, TKey key,
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// ref TValue reference)
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// {
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// var keyCode = HashCode.Get(ref key) & int.MaxValue;
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// var result = true;
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//
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// StartOfLookup:
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// if (dictionary.buckets != null)
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// {
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// var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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// while (bucket >= 0)
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// {
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// ref var entry = ref dictionary.entries[bucket];
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// if (entry.hashCode == keyCode && entry.key.Equals<TKey>(key))
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// {
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// reference.Value = ref entry.value;
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// return result;
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// }
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//
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// bucket = entry.next;
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// }
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// }
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//
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// result = false;
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// dictionary.Add(key, Reflection.New<TValue>());
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// goto StartOfLookup;
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// }
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static TValue GetOrAdd<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, TKey key)
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where TValue : new()
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{
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var keyCode = HashCode.Get(key) & int.MaxValue;
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StartOfLookup:
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if (dictionary.buckets != null)
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{
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && entry.key.Equals<TKey>(key))
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return entry.value;
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bucket = entry.next;
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}
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}
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dictionary.Add(key, Reflection.New<TValue>());
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goto StartOfLookup;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static TValue GetOrAdd<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, ref TKey key)
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where TValue : new()
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{
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var keyCode = HashCode.Get(ref key) & int.MaxValue;
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StartOfLookup:
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if (dictionary.buckets != null)
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{
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && Equality.EqualsByRef(ref entry.key, ref key))
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return entry.value;
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bucket = entry.next;
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}
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}
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dictionary.Add(key, Reflection.New<TValue>());
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goto StartOfLookup;
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}
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public static bool TryGetOrAddValue<TKey, TValue>(this Dictionary<TKey, TValue> dictionary, TKey key,
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out TValue value)
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{
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var keyCode = HashCode.Get(ref key) & int.MaxValue;
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var result = true;
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StartOfLookup:
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if (dictionary.buckets != null)
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{
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var bucket = dictionary.buckets[keyCode % dictionary.buckets.Length];
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while (bucket >= 0)
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{
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ref var entry = ref dictionary.entries[bucket];
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if (entry.hashCode == keyCode && entry.key.Equals<TKey>(key))
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{
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value = entry.value;
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return result;
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}
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bucket = entry.next;
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}
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}
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result = false;
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dictionary.Add(key, Reflection.New<TValue>());
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goto StartOfLookup;
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}
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public static int RemoveWhere<TKey, TValue>(this Dictionary<TKey, TValue> dictionary,
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Predicate<KeyValuePair<TKey, TValue>> predicate)
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{
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Guard.IsNotNull(dictionary);
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Guard.IsNotNull(predicate);
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var entries = dictionary.entries;
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if (entries is null)
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return 0;
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var removedCount = 0;
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var entriesCount = entries.Length;
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for (var i = 0; i < entriesCount; i++)
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{
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ref var entry = ref entries[i];
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if (entry.hashCode < 0) // valid entries are stored with & int.MaxValue on hashCode
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continue;
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// predicate might modify collection, turning a ref invalid
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var keyValuePair = new KeyValuePair<TKey,TValue>(entry.key, entry.value);
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if (!predicate(keyValuePair))
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continue;
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if (dictionary.Remove(keyValuePair.Key))
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removedCount++;
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}
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return removedCount;
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}
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[DoesNotReturn]
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private static ref V ThrowKeyNotFoundException<T, V>(T key)
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{
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Guard.IsNotNull(key);
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ThrowKeyNotFoundException(key);
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return ref Unsafe.NullRef<V>();
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}
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[DoesNotReturn]
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private static void ThrowKeyNotFoundException(object key)
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=> throw new KeyNotFoundException($"The given key '{key}' was not present in the dictionary.");
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static ref int Version<T>(this List<T> list) => ref list._version;
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void AddRangeFast<T>(this List<T> list, List<T> range)
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{
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if (range._size < 1)
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return;
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list.EnsureCapacity(list._size + range._size);
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range.UnsafeCopyTo(list, list._size);
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list._size += range._size;
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list._version++;
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}
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|
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
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public static void UnsafeCopyTo<T>(this List<T> source, List<T> destination, int destinationStartIndex)
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=> UnsafeBlockCopy(ref source._items[0], ref destination._items[destinationStartIndex], source._size);
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|
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
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public static void UnsafeCopyTo<T>(this T[] source, T[] destination, int destinationStartIndex)
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=> UnsafeBlockCopy(ref source[0], ref destination[destinationStartIndex], source.Length);
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|
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
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public static unsafe void UnsafeBlockCopy<T>(ref T source, ref T destination, int count)
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=> Unsafe.CopyBlock(ref Unsafe.As<T, byte>(ref destination),
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ref Unsafe.As<T, byte>(ref source),
|
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(uint)((nint)sizeof(T) * count));
|
|
|
|
/// <summary>
|
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/// Returns a list's internal _items array. Keep in mind list.Version() needs to change every time items are
|
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/// modified.
|
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/// </summary>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static T[] ItemsUnchecked<T>(this List<T> list) => list._items;
|
|
|
|
/// <summary>
|
|
/// Returns a span pointing to a list's internal _items array. Keep in mind list.Version() needs to change every
|
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/// time items are modified.
|
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/// </summary>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static Span<T> AsSpanUnchecked<T>(this List<T> list) => new(list._items, 0, list._size);
|
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|
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
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public static ReadOnlySpan<T> AsReadOnlySpan<T>(this List<T> list) => new(list._items, 0, list._size);
|
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|
|
public static void ReplaceContentsWith<T>(this List<T> list, [AllowNull] List<T> collection)
|
|
{
|
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if (ReferenceEquals(list, collection))
|
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return;
|
|
|
|
if (collection is null
|
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|| (collection._size is var collectionCount
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&& collectionCount == 0))
|
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{
|
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list.Clear();
|
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return;
|
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}
|
|
|
|
if (collectionCount <= list._size)
|
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{
|
|
if (collectionCount < list._size)
|
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list.RemoveRange(collectionCount, list._size - collectionCount);
|
|
|
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collection.UnsafeCopyTo(list, 0);
|
|
}
|
|
else
|
|
{
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|
list._items = new T[collectionCount];
|
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collection.UnsafeCopyTo(list, 0);
|
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list._size = collectionCount;
|
|
}
|
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|
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list._version++;
|
|
}
|
|
|
|
public static void ReplaceContentsWith<T, V>(this List<T> list, [AllowNull] V collection) where V : ICollection<T>
|
|
{
|
|
if (typeof(V) == typeof(List<T>))
|
|
list.ReplaceContentsWith(Unsafe.As<List<T>>(collection));
|
|
|
|
if (ReferenceEquals(list, collection))
|
|
return;
|
|
|
|
if (collection is null
|
|
|| (collection.Count is var collectionCount
|
|
&& collectionCount == 0))
|
|
{
|
|
list.Clear();
|
|
return;
|
|
}
|
|
|
|
if (collectionCount <= list._size)
|
|
{
|
|
if (collectionCount < list._size)
|
|
list.RemoveRange(collectionCount, list._size - collectionCount);
|
|
collection.CopyTo(list._items, 0);
|
|
}
|
|
else
|
|
{
|
|
list._items = new T[collectionCount];
|
|
collection.CopyTo(list._items, 0);
|
|
list._size = collectionCount;
|
|
}
|
|
|
|
list._version++;
|
|
}
|
|
|
|
public static FishTable<TKey, TSource> ToFishTable<TSource, TKey>(this IEnumerable<TSource> source,
|
|
Func<TSource, TKey> keySelector)
|
|
=> source.ToFishTable(keySelector, static item => item);
|
|
|
|
public static FishTable<TKey, TValue> ToFishTable<TSource, TKey, TValue>(this IEnumerable<TSource> source,
|
|
Func<TSource, TKey> keySelector, Func<TSource, TValue> valueSelector)
|
|
{
|
|
Guard.IsNotNull(source);
|
|
Guard.IsNotNull(keySelector);
|
|
Guard.IsNotNull(valueSelector);
|
|
|
|
var capacity = 0;
|
|
if (source is ICollection iCollection)
|
|
capacity = (int)(iCollection.Count * 1.5f);
|
|
|
|
var fishTable = new FishTable<TKey, TValue>(capacity);
|
|
fishTable.AddRange(source, keySelector, valueSelector);
|
|
return fishTable;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static void Clear<T>(this T[] array) => Array.Clear(array, 0, array.Length);
|
|
|
|
// public static List<T> Copy<T>(this List<T> source)
|
|
// {
|
|
// Guard.IsNotNull(source);
|
|
//
|
|
// var destination = new List<T>(source._size);
|
|
//
|
|
// if (source._size == 0)
|
|
// return destination;
|
|
//
|
|
// // Unsafe.CopyBlock(ref Unsafe.As<T, byte>(ref destination._items[0]),
|
|
// // ref Unsafe.As<T, byte>(ref source._items[0]), (uint)sizeof(T) * (uint)source._size);
|
|
//
|
|
// FisheryLib.CollectionExtensions.UnsafeBlockCopy(ref source._items[0], // does a type check that causes issues
|
|
// ref destination._items[0], source._size); // when called from transpiled methods
|
|
//
|
|
// destination._size = source._size;
|
|
//
|
|
// return destination;
|
|
// }
|
|
|
|
public static unsafe List<T> Copy<T>(this List<T> source)
|
|
{
|
|
Guard.IsNotNull(source);
|
|
|
|
var destination = new List<T>(source._size);
|
|
|
|
if (source._size == 0)
|
|
return destination;
|
|
|
|
fixed (void* destinationPointer = &destination._items[0], sourcePointer = &source._items[0])
|
|
Unsafe.CopyBlock(destinationPointer, sourcePointer, (uint)(source._size * sizeof(T)));
|
|
|
|
destination._size = source._size;
|
|
|
|
return destination;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static void AddRangeFast<T>(this List<T> list, T[] range)
|
|
{
|
|
Guard.IsNotNull(list);
|
|
Guard.IsNotNull(range);
|
|
|
|
if (range.Length < 1)
|
|
return;
|
|
|
|
list.EnsureCapacity(list._size + range.Length);
|
|
range.UnsafeCopyTo(list._items, list._size);
|
|
|
|
list._size += range.Length;
|
|
list._version++;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static void Add(this List<char> list, string value)
|
|
{
|
|
Guard.IsNotNull(list);
|
|
Guard.IsNotNull(value);
|
|
|
|
if (value.Length < 1)
|
|
return;
|
|
|
|
list.EnsureCapacity(list._size + value.Length);
|
|
UnsafeBlockCopy(ref value.m_firstChar,
|
|
ref list._items[list._size], value.Length);
|
|
|
|
list._size += value.Length;
|
|
list._version++;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static StringBuilder Append(this StringBuilder builder, List<char> value)
|
|
=> builder.Append(value._items, 0, value._size);
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static StringBuilder Append<T>(this StringBuilder builder, T? value)
|
|
// ReSharper disable once RedundantToStringCallForValueType
|
|
// ReSharper disable once CompareNonConstrainedGenericWithNull
|
|
// ReSharper disable once HeapView.PossibleBoxingAllocation
|
|
=> value == null ? builder : builder.Append(value.ToString());
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static ref T GetReference<T>(this List<T> list, int index)
|
|
{
|
|
Guard.IsInRange(index, 0, list.Count);
|
|
|
|
list._version++;
|
|
return ref list._items[index];
|
|
}
|
|
|
|
[Obsolete("Renamed to GetReferenceUnsafe")]
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static ref T GetReferenceUnverifiable<T>(this List<T> list, int index) => ref list.GetReferenceUnsafe(index);
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static ref T GetReferenceUnsafe<T>(this List<T> list, int index) => ref list._items[index];
|
|
|
|
public static IList TryNew(IEnumerable enumerable, Type type) => GetListExtensionMethods(type).New(enumerable);
|
|
|
|
public static void TryAddRange<T>(this IList list, T collection, Type type) where T : ICollection
|
|
=> GetListExtensionMethods(type).AddRange(list, collection);
|
|
|
|
public static Array TryToArray(this IList list, Type type) => GetListExtensionMethods(type).ToArray(list);
|
|
|
|
public static void RemoveAtFastUnordered<T>(this List<T> list, int index)
|
|
{
|
|
ref var lastBucket = ref list._items[list._size - 1];
|
|
list[index] = lastBucket;
|
|
lastBucket = default!;
|
|
list._size--;
|
|
}
|
|
|
|
public static bool RemoveFastUnordered<T>(this List<T> list, T item)
|
|
{
|
|
var index = list.IndexOf(item);
|
|
if (index < 0)
|
|
return false;
|
|
|
|
list.RemoveAtFastUnordered(index);
|
|
return true;
|
|
}
|
|
|
|
public static void InsertFastUnordered<T>(this List<T> list, int index, T item)
|
|
{
|
|
if ((uint) index > (uint) list._size)
|
|
ThrowHelper.ThrowArgumentOutOfRangeException();
|
|
|
|
if (list._size == list._items.Length)
|
|
list.EnsureCapacity(list._size + 1);
|
|
|
|
ref var targetBucket = ref list._items[index];
|
|
|
|
list._items[list._size] = targetBucket;
|
|
targetBucket = item;
|
|
list._size++;
|
|
list._version++;
|
|
}
|
|
|
|
public static unsafe uint GetSizeEstimate<TKey, TValue>(this Dictionary<TKey, TValue> dictionary)
|
|
=> dictionary.GetType().ComputeManagedObjectSizeEstimate()
|
|
+ ((uint)sizeof(Dictionary<TKey, TValue>.Entry) * (uint)(dictionary.entries?.Length ?? 0))
|
|
+ (sizeof(int) * (uint)(dictionary.buckets?.Length ?? 0));
|
|
|
|
internal static unsafe uint ComputeManagedObjectSizeEstimate(this Type type)
|
|
{
|
|
var objectHeader = (uint)sizeof(void*) * 2u;
|
|
var cachedSize = CachedManagedObjectSizes.GetOrAdd(type.TypeHandle.Value);
|
|
// can't use GetOrAddReference here due to recursion
|
|
|
|
if (cachedSize.Size == uint.MaxValue)
|
|
UpdateCachedManagedObjectSize(type, ref cachedSize);
|
|
|
|
return objectHeader + cachedSize.Size;
|
|
}
|
|
|
|
private static void UpdateCachedManagedObjectSize(Type type, ref ManagedObjectSize cachedSize)
|
|
{
|
|
cachedSize.Size = 0;
|
|
var fields = type.GetFields(BindingFlags.Instance
|
|
| BindingFlags.Public
|
|
| BindingFlags.NonPublic);
|
|
|
|
for (var i = fields.Length; i-- > 0;)
|
|
{
|
|
var fieldType = fields[i].FieldType;
|
|
if (!typeof(ValueType).IsAssignableFrom(fieldType) || fieldType == typeof(ValueType))
|
|
// IsValueType and IsSubclassOf somehow cause StackOverflows here
|
|
cachedSize.Size += (uint)IntPtr.Size;
|
|
else if (fieldType.IsPrimitive)
|
|
cachedSize.Size += (uint)Marshal.SizeOf(fieldType);
|
|
else if (fieldType != type)
|
|
cachedSize.Size += fieldType.ComputeManagedObjectSizeEstimate();
|
|
else
|
|
cachedSize.Size += (uint)IntPtr.Size; // fuck it
|
|
}
|
|
|
|
var remainder = cachedSize.Size % (uint)IntPtr.Size;
|
|
if (remainder != 0u)
|
|
cachedSize.Size += (uint)IntPtr.Size - remainder;
|
|
|
|
CachedManagedObjectSizes[type.TypeHandle.Value] = cachedSize;
|
|
}
|
|
|
|
private static FishTable<IntPtr, ManagedObjectSize> CachedManagedObjectSizes => _cachedManagedObjectSizes ??= new();
|
|
|
|
[ThreadStatic]
|
|
private static FishTable<IntPtr, ManagedObjectSize>? _cachedManagedObjectSizes;
|
|
|
|
private struct ManagedObjectSize
|
|
{
|
|
public uint Size = uint.MaxValue;
|
|
|
|
[UsedImplicitly]
|
|
public ManagedObjectSize()
|
|
{
|
|
}
|
|
}
|
|
|
|
public static GenericBase GetListExtensionMethods(Type type)
|
|
=> ListExtensionCache.TryGetValue(type)
|
|
?? CreateListExtensionMethods(type);
|
|
|
|
private static GenericBase CreateListExtensionMethods(Type type)
|
|
{
|
|
var methods = (GenericBase)Activator.CreateInstance(typeof(Generic<>).MakeGenericType(type));
|
|
ListExtensionCache[type] = methods;
|
|
return methods;
|
|
}
|
|
|
|
private static Dictionary<Type, GenericBase> ListExtensionCache => _listExtensionCache ??= new();
|
|
|
|
[ThreadStatic]
|
|
private static Dictionary<Type, GenericBase>? _listExtensionCache;
|
|
|
|
public abstract class GenericBase
|
|
{
|
|
public abstract void AddRange(IList list, ICollection collection);
|
|
public abstract Array ToArray(IList list);
|
|
public abstract IList New(IEnumerable enumerable);
|
|
}
|
|
|
|
public class Generic<T> : GenericBase
|
|
{
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public override void AddRange(IList list, ICollection collection)
|
|
=> ((List<T>)list).AddRange((IEnumerable<T>)collection);
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public override Array ToArray(IList list) => ((List<T>)list).ToArray();
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public override IList New(IEnumerable enumerable) => new List<T>((IEnumerable<T>)enumerable);
|
|
}
|
|
} |