using System.Text;
using System.Runtime.InteropServices;
using RGiesecke.DllExport;

class MyExtension {

#if WIN64
        [DllExport("RVExtensionVersion", CallingConvention = CallingConvention.Winapi)]
#else
        [DllExport("_RVExtensionVersion@8", CallingConvention = CallingConvention.Winapi)]
#endif
        public static void RvExtensionVersion(StringBuilder output, int outputSize)
        {
            output.Append("Test-Extension v1.0");
        }

#if WIN64
        [DllExport("RVExtension", CallingConvention = CallingConvention.Winapi)]
#else
        [DllExport("_RVExtension@12", CallingConvention = CallingConvention.Winapi)]
#endif
        public static void RvExtension(StringBuilder output, int outputSize,
            [MarshalAs(UnmanagedType.LPStr)] string function)
        {
            output.Append(function);
        }

#if WIN64
        [DllExport("RVExtensionArgs", CallingConvention = CallingConvention.Winapi)]
#else
        [DllExport("_RVExtensionArgs@20", CallingConvention = CallingConvention.Winapi)]
#endif
        public static int RvExtensionArgs(StringBuilder output, int outputSize,
            [MarshalAs(UnmanagedType.LPStr)] string function,
            [MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.LPStr, SizeParamIndex = 4)] string[] args, int argCount)
        {
            foreach(var arg in args)
            {
                output.Append(arg);
            }
            return 0;
        }
}