MiloszKrajewski

/// <summary>
/// Minimal templating engine allowing for <c>{variable}</c> expansions which is more useful than
/// <see cref="M:String.Format()"/>'s <c>{0}</c>. The difference between this and string
/// interpolation is the fact that it can be done on user strings, not only on precompiled ones.
/// </summary>
public static partial class Template
{
	// Prevents circular expansion, allowing quite deep nesting at the same time.
	private const int MaximumExpansionDepth = 1024;

MiloszKrajewski

using System;
using System.Collections.Generic;
using System.Text;

internal static class StringBuilderExtensions
{
	public static StringBuilder AppendJNull(this StringBuilder builder) =>
		builder.Append("null");

	public static StringBuilder AppendJNumber(this StringBuilder builder, double value) =>

MiloszKrajewski

class UnpackTest
{
	byte[] _source;
	byte[] _target;
	
	public UnpackTest()
	{
		int size = 1000 * Vector128<byte>.Count;
		var source = new byte[size];
		var target = new byte[size * 2];

MiloszKrajewski

// * stackalloc does not work, we need pool as consumer is async so it needs Memory not Span
// * this might be most likley overcomplicated and ArrayBufferWriter could be enough, 
//   but it really tries to abuse the chance that read chunks are very small so there is 
//   only one rent from pool and one alloc for final result
// * these 3 methods could be a struct nicely encapsulating functionality but it is used 
//   from async method so struct would be copied all the time
// * these 3 methods could be a class, but I would like to limit allocation to minimum, 
//   so it uses `ref` arguments to delegate `state` to caller and allow keeping it on stack

static async ValueTask<ReadOnlyMemory<byte>> ReceiveStringAsync(WebSocket socket, CancellationToken ct = default)

MiloszKrajewski

$dp0 = $PSScriptRoot
$version = '4.13.1'

$jar = "antlr-$version-complete.jar"
$url = "https://www.antlr.org/download/$jar"

if (-not (Test-Path "$dp0/$jar")) {
    Invoke-WebRequest -Uri $url -OutFile "$dp0/$jar"
}

MiloszKrajewski

using System.Xml.Linq;

namespace K4os.Outbox.Resources;

public class EmbeddedResourceLoader
{
	public static Stream GetStream<THook>(string path) =>
		typeof(THook).Assembly.GetManifestResourceStream(typeof(THook), path) ??
		throw new ArgumentException($"Embedded resource '{path}' not found");

MiloszKrajewski

using System.Buffers;
using System.Runtime.InteropServices;
using BenchmarkDotNet.Attributes;

namespace MemoryBenchmarks
{
	[MemoryDiagnoser]
	public class BufferAllocation
	{
		private static readonly ArrayPool<byte> Pool = ArrayPool<byte>.Shared;

MiloszKrajewski

public static string Between(StringBuilder result, string a, string b)
{
	if (a == b) return a;
	if (Compare(a, b) >= 0)
		throw new InvalidOperationException();

	var ai = 0;
	var bi = 0;

	while (true)

MiloszKrajewski

internal static class TypeExtensions
{
	/// <summary>
	/// Type distance cache. It should Concurrent dictionary but it is not available
	/// on all flavors of Portable Class Library.
	/// </summary>
	private static readonly ConcurrentDictionary<(Type, Type), int> TypeDistanceMap =
		new ConcurrentDictionary<(Type, Type), int>();

	/// <summary>Checks if child type inherits (or implements) from parent.</summary>

MiloszKrajewski

public class Pool<T>
{
	private readonly ConcurrentQueue<T> _queue;
	private readonly Func<T> _create;
	private readonly Action<T> _reset;
	private readonly Action<T> _destroy;
	private int _freeSlots;

	public Pool(Func<T> create, Action<T> reset, Action<T> destroy, int size)
	{