MacOSTextReader

MacOSTextReader.cs

using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

sealed class MacOSTextReader : TextReader
{
	readonly TextReader inner;

	public MacOSTextReader(TextReader inner)
	{
		this.inner = inner;
	}

	static void SwapLineEnds(Span<char> span)
	{
		for (int i = 0; i < span.Length; i++)
		{
			if (span[i] == '\r')
			{
				span[i] = '\n';
			}
		}
	}

	public override async Task<int> ReadAsync(char[] buffer, int index, int count)
	{
		var l = await inner.ReadAsync(buffer, index, count).ConfigureAwait(false);
		SwapLineEnds(buffer.AsSpan(0, l));
		return l;
	}

	public override ValueTask<int> ReadAsync(Memory<char> buffer, CancellationToken cancellationToken = default)
	{
		var l = inner.ReadAsync(buffer, cancellationToken);
		SwapLineEnds(buffer.Span);
		return l;
	}

	public override int Read(char[] buffer, int index, int count)
	{
		var l = inner.Read(buffer, index, count);
		SwapLineEnds(buffer.AsSpan(0, l));
		return l;
	}

	protected override void Dispose(bool disposing)
	{
		if (disposing)
		{
			inner.Dispose();
		}
	}
}