namespace MySql.Data.Common
{
    using System;
    using System.Runtime.InteropServices;

    internal class NativeMethods
    {
        public const uint FILE_FLAG_NO_BUFFERING = 0x20000000;
        public const uint FILE_FLAG_OVERLAPPED = 0x40000000;
        public const uint GENERIC_READ = 0x80000000;
        public const uint GENERIC_WRITE = 0x40000000;
        public const int INVALIDpipeHandle_VALUE = -1;
        public const uint OPEN_EXISTING = 3;

        private NativeMethods()
        {
        }

        [return: MarshalAs(UnmanagedType.Bool)]
        [DllImport("kernel32.dll", SetLastError=true)]
        public static extern bool CloseHandle(IntPtr handle);
        [DllImport("ws2_32.dll", SetLastError=true)]
        public static extern int connect(IntPtr socket, byte[] addr, int addrlen);
        [DllImport("Kernel32")]
        public static extern int CreateFile(string fileName, uint desiredAccess, uint shareMode, SecurityAttributes securityAttributes, uint creationDisposition, uint flagsAndAttributes, uint templateFile);
        [return: MarshalAs(UnmanagedType.Bool)]
        [DllImport("kernel32.dll", SetLastError=true)]
        public static extern bool FlushFileBuffers(IntPtr handle);
        [DllImport("ws2_32.dll", SetLastError=true)]
        public static extern int ioctlsocket(IntPtr socket, uint cmd, ref uint arg);
        [return: MarshalAs(UnmanagedType.Bool)]
        [DllImport("kernel32.dll", SetLastError=true)]
        public static extern bool PeekNamedPipe(IntPtr handle, byte[] buffer, uint nBufferSize, ref uint bytesRead, ref uint bytesAvail, ref uint BytesLeftThisMessage);
        [return: MarshalAs(UnmanagedType.Bool)]
        [DllImport("kernel32.dll", SetLastError=true)]
        internal static extern bool ReadFile(IntPtr hFile, [Out] byte[] lpBuffer, uint nNumberOfBytesToRead, out uint lpNumberOfBytesRead, IntPtr lpOverlapped);
        [DllImport("ws2_32.dll", SetLastError=true)]
        public static extern int recv(IntPtr socket, byte[] buff, int len, int flags);
        [DllImport("ws2_32.Dll", SetLastError=true)]
        public static extern int send(IntPtr socket, byte[] buff, int len, int flags);
        [DllImport("ws2_32.dll", SetLastError=true)]
        public static extern IntPtr socket(int af, int type, int protocol);
        [return: MarshalAs(UnmanagedType.Bool)]
        [DllImport("Kernel32")]
        internal static extern bool WriteFile(IntPtr hFile, [In] byte[] buffer, uint numberOfBytesToWrite, out uint numberOfBytesWritten, IntPtr lpOverlapped);
        [DllImport("ws2_32.dll", SetLastError=true)]
        public static extern int WSAGetLastError();
        [DllImport("ws2_32.dll", SetLastError=true)]
        public static extern int WSAIoctl(IntPtr s, uint dwIoControlCode, byte[] inBuffer, uint cbInBuffer, byte[] outBuffer, uint cbOutBuffer, IntPtr lpcbBytesReturned, IntPtr lpOverlapped, IntPtr lpCompletionRoutine);

        [StructLayout(LayoutKind.Sequential)]
        public class SecurityAttributes
        {
            public int Length = Marshal.SizeOf(typeof(NativeMethods.SecurityAttributes));
            public IntPtr securityDescriptor = IntPtr.Zero;
            public bool inheritHandle;
        }
    }
}