Mask.cs

using System;
using System.Runtime.CompilerServices;

namespace Foster.Framework;

/// <summary>
/// A Struct for managing Masks
/// </summary>
public struct Mask
{

    public const ulong All = 0xFFFFFFFFFFFFFFFF;
    public const ulong None = 0;
    public const ulong Default = (1 << 0);

    public ulong Value;

    public Mask(ulong value)
    {
        Value = value;
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public void Add(Mask mask)
    {
        Value |= mask.Value;
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public void Remove(Mask mask)
    {
        Value &= ~mask.Value;
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public bool Has(Mask mask)
    {
        return (Value & mask.Value) > 0;
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static Mask Make(int index)
    {
        if (index < 0 || index > 63)
            throw new ArgumentOutOfRangeException(nameof(index), "Index must be between 0 and 63");

        return new Mask(((ulong)1 << index));
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static Mask operator |(Mask a, Mask b) => new Mask(a.Value | b.Value);

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static Mask operator &(Mask a, Mask b) => new Mask(a.Value & b.Value);

    public static implicit operator ulong(Mask mask) => mask.Value;
    public static implicit operator Mask(ulong val) => new Mask(val);

}