ryujinx/Ryujinx.HLE/HOS/Services/Hid/HidServer/HidUtils.cs

using System;

namespace Ryujinx.HLE.HOS.Services.Hid.HidServer
{
    static class HidUtils
    {
        public static PlayerIndex GetIndexFromNpadIdType(NpadIdType npadIdType)
        => npadIdType switch
        {
            NpadIdType.Player1  => PlayerIndex.Player1,
            NpadIdType.Player2  => PlayerIndex.Player2,
            NpadIdType.Player3  => PlayerIndex.Player3,
            NpadIdType.Player4  => PlayerIndex.Player4,
            NpadIdType.Player5  => PlayerIndex.Player5,
            NpadIdType.Player6  => PlayerIndex.Player6,
            NpadIdType.Player7  => PlayerIndex.Player7,
            NpadIdType.Player8  => PlayerIndex.Player8,
            NpadIdType.Handheld => PlayerIndex.Handheld,
            NpadIdType.Unknown  => PlayerIndex.Unknown,
            _                   => throw new ArgumentOutOfRangeException(nameof(npadIdType))
        };

        public static NpadIdType GetNpadIdTypeFromIndex(PlayerIndex index)
        => index switch
        {
            PlayerIndex.Player1  => NpadIdType.Player1,
            PlayerIndex.Player2  => NpadIdType.Player2,
            PlayerIndex.Player3  => NpadIdType.Player3,
            PlayerIndex.Player4  => NpadIdType.Player4,
            PlayerIndex.Player5  => NpadIdType.Player5,
            PlayerIndex.Player6  => NpadIdType.Player6,
            PlayerIndex.Player7  => NpadIdType.Player7,
            PlayerIndex.Player8  => NpadIdType.Player8,
            PlayerIndex.Handheld => NpadIdType.Handheld,
            PlayerIndex.Unknown  => NpadIdType.Unknown,
            _                    => throw new ArgumentOutOfRangeException(nameof(index))
        };
    }
}