#include <socket/wsadata.hpp>

WORD WSASystem::smIsInitialized;
WORD WSASystem::smInstanceCount;
WSADATA WSASystem::smWSAData;

WSASystem::WSASystem(void)
{
	WORD wsaVersion(MAKEWORD(1,1));
	++smInstanceCount;
	if(1==smInstanceCount)
	{
		::memset(&smWSAData,0,sizeof(smWSAData));
    if(!(::WSAStartup(wsaVersion,&smWSAData)))smIsInitialized=TRUE;
	}
}

String WSASystem::getLastError(void)const
{
	switch(::WSAGetLastError())
	{
	  case WSANOTINITIALISED :
		  return "WSANOTINITIALISED : A successful WSAStartup must occur before using this function.";
		case WSAENETDOWN :
		  return "WSAENETDOWN : The network subsystem has failed. ";
		case WSAEFAULT :
		  return "WSAEFAULT : The buf or from parameters are not part of the user address space, or the fromlen parameter is too small to accommodate the peer address.";
		case WSAEINTR :
		  return "WSAEINTR : The (blocking) call was canceled through WSACancelBlockingCall. ";
		case WSAEINPROGRESS :
		  return "WSAEINPROGRESS : A blocking Windows Sockets 1.1 call is in progress, or the service provider is still processing a callback function. ";
		case WSAEINVAL :
		  return "WSAEINVAL : The socket has not been bound with bind, or an unknown flag was specified, or MSG_OOB was specified for a socket with SO_OOBINLINE enabled, or (for byte stream style sockets only) len was zero or negative. ";
		case WSAENETRESET :
		  return "WSAENETRESET : The connection has been broken due to the remote host resetting.";
		case WSAENOTCONN :
		  return "WSAENOTCONN : The socket is not connected (connection-oriented sockets only).";
		case WSAENOTSOCK  :
		  return "WSAENOTSOCK :	The descriptor is not a socket.";
		case WSAEOPNOTSUPP :
		  return "WSAEOPNOTSUPP : MSG_OOB was specified, but the socket is not stream style such as type SOCK_STREAM, out-of-band data is not supported in the communication domain associated with this socket, or the socket is unidirectional and supports only send operations.";
		case WSAESHUTDOWN :
		  return "WSAESHUTDOWN : The socket has been shut down; it is not possible to recvfrom on a socket after shutdown has been invoked with how set to SD_RECEIVE or SD_BOTH.";
		case WSAEWOULDBLOCK :
		  return "WSAEWOULDBLOCK : The socket is marked as nonblocking and the recvfrom operation would block.";
		case WSAEMSGSIZE :
		  return "WSAEMSGSIZE	: The message was too large to fit into the specified buffer and was truncated.";
		case WSAECONNABORTED :
		  return "WSAECONNABORTED : The virtual circuit was terminated due to a time-out or other failure. The application should close the socket as it is no longer usable.";
		case WSAETIMEDOUT :
		  return "WSAETIMEDOUT : The connection has been dropped, because of a network failure or because the system on the other end went down without notice.";
		case WSAECONNRESET :
		  return "The virtual circuit was reset by the remote side executing a “hard” or “abortive” close. The application should close the socket as it is no longer usable. On a UDP datagram socket this error would indicate that a previous send operation resulted in an ICMP \"Port Unreachable\" message.";
		case WSAEADDRINUSE  :
		  return "The specified address is already in use. (See the SO_REUSEADDR socket option under setsockopt.)";
		default :
		  return "WSADATA.CPP: Unknown socket error";
	}
}