using System;
using System.Runtime.InteropServices;

namespace PkmnLibSharp.Utils
{
    internal static class FFIExtensions
    {
        internal static byte ForeignBool(this bool b)
        {
            return b ? (byte)1 : (byte)0;
        } 
        
        internal static IntPtr ToPtr(this string? s)
        {
            if (s == null) return IntPtr.Zero;
            return Marshal.StringToHGlobalAnsi(s);
        }

        internal static string? PtrString(this IntPtr i)
        {
            return i == IntPtr.Zero ? null : Marshal.PtrToStringAnsi(i);
        }
        
        internal static IntPtr ArrayPtr(this IntPtr[] a)
        {
            return Marshal.UnsafeAddrOfPinnedArrayElement(a, 0);
        }
        internal static IntPtr ArrayPtr<T>(this T[] a) where T : struct, IConvertible
        {
            return Marshal.UnsafeAddrOfPinnedArrayElement(a, 0);
        }
    }
}