SLFileHeader.cs

using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace SL3Reader
{
    [StructLayout(LayoutKind.Sequential, Size = Size)]
    [DebuggerDisplay($"{{{nameof(ToString)}(),nq}}")]
    public readonly ref struct SLFileHeader
    {
        public const int Size = 8;

        public readonly LogFileFormat FileFormat { get; }
        public readonly short DeviceID { get; }

        public readonly short BlockSize { get; }

        public readonly short Reserved { get; }

        [SkipLocalsInit]
        public readonly override string ToString() =>
            FileFormat.ToString() + " (" + BlockSize.ToString() + ')';

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public readonly void ThrowIfInvalidFormatDetected()
        {
            if (FileFormat != LogFileFormat.SL3)
                throw new InvalidDataException("Unsupported file type. Expected type SL3.");
        }
    }
}