RustyHearts-Launcher/DynamicLib/ZLibDll.cs

using System.Runtime.InteropServices;

namespace RHLauncher.DynamicLib
{
    public static class ZLibDll
    {

        //[DllImport("ZlibDll.dll", CallingConvention = CallingConvention.Cdecl)]
        //public static extern int Decompress(byte[] compressed_buffer, int compressed_size, byte[] decompressed_buffer, ref int decompressed_size);

        public delegate int DecompressDelegate(byte[] compressed_buffer, int compressed_size, byte[] decompressed_buffer, ref int decompressed_size);
        public static DecompressDelegate? Decompress = null;

        //[DllImport("ZlibDll.dll", CallingConvention = CallingConvention.Cdecl)]
        //public static extern int Compress(byte[] decompressed_buffer, int decompressed_size, byte[] compressed_buffer, ref int compressed_size);
        public delegate int CompressDelegate(byte[] decompressed_buffer, int decompressed_size, byte[] compressed_buffer, ref int compressed_size);
        public static CompressDelegate? Compress = null;

        static ZLibDll()
        {
            byte[] libBuffer = ResourceDll.ZlibDll;
            string dllPath = Path.Combine(Path.GetTempPath(), "ZlibDll.dll");
            try
            {
                File.WriteAllBytes(dllPath, libBuffer);
            }
            catch { }

            int hModule = NativeMethod.LoadLibrary(dllPath);
            if (hModule == 0) return;

            IntPtr intPtr = NativeMethod.GetProcAddress(hModule, "Decompress");
            Decompress = (DecompressDelegate)Marshal.GetDelegateForFunctionPointer(intPtr, typeof(DecompressDelegate));

            intPtr = NativeMethod.GetProcAddress(hModule, "Compress");
            Compress = (CompressDelegate)Marshal.GetDelegateForFunctionPointer(intPtr, typeof(CompressDelegate));
        }
    }
}