+#ifdef WIN32
+#define get_last_sys_error() GetLastError()
+#define clear_sys_error() SetLastError(0)
+#else
+#define get_last_sys_error() errno
+#define clear_sys_error() errno=0
+#endif
+
+#ifdef WINDOWS
+#define get_last_socket_error() WSAGetLastError()
+#define clear_socket_error() WSASetLastError(0)
+#define readsocket(s,b,n) recv((s),(b),(n),0)
+#define writesocket(s,b,n) send((s),(b),(n),0)
+#define EADDRINUSE WSAEADDRINUSE
+#else
+#define get_last_socket_error() errno
+#define clear_socket_error() errno=0
+#define ioctlsocket(a,b,c) ioctl(a,b,c)
+#define closesocket(s) close(s)
+#define readsocket(s,b,n) read((s),(b),(n))
+#define writesocket(s,b,n) write((s),(b),(n))
+#endif
+