RecvWIN32Example

    // ------------------------------- //
    // -------- Start of File -------- //
    // ------------------------------- //
    // ----------------------------------------------------------- //
    // C++ Source Code File Name: r_win32.cpp
    // C++ Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC
    // Produced By: DataReel Software Development Team
    // File Creation Date: 09/20/1999
    // Date Last Modified: 06/17/2016
    // Copyright (c) 2001-2016 DataReel Software Development
    // ----------------------------------------------------------- //
    // ------------- Program Description and Details ------------- //
    // ----------------------------------------------------------- //
    /*
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
    USA

    Code used by Win32 applications to read and write data to and
    from a serial port using overlapped I/O.
    */
    // ----------------------------------------------------------- //
    #include "gxdlcode.h"

    void PrintError(LPCSTR str)
    {
      LPVOID lpMessageBuffer;
      int error = GetLastError();
      FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
    		FORMAT_MESSAGE_FROM_SYSTEM,
    		NULL,
    		error,
    		MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
    		(LPTSTR) &lpMessageBuffer,
    		0,
    		NULL);
      cout << str << ": " << error << " " << lpMessageBuffer << "\n";
      LocalFree(lpMessageBuffer);
    }

    DWORD CALLBACK ConsoleThread(HANDLE h)
    // Starts a user input thread using the console.
    // Takes console characters and sends them to the com port.
    {
      OVERLAPPED ov;
      HANDLE hconn = GetStdHandle(STD_INPUT_HANDLE);
      BOOL quit = FALSE;

      ZeroMemory(&ov, sizeof(ov));
      ov.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
      if(ov.hEvent == INVALID_HANDLE_VALUE) {
        PrintError("CreateEvent failed");
        SetCommMask(h, 0);
        return 0;
      }

      SetConsoleMode(hconn, 0);
      cout << "Waiting to receive..." << "\n";
      cout << "Press Esc to terminate." << "\n";
      do {
        char buf[10];
        DWORD bytes_read = 0;

        // Wait for user data
        WaitForSingleObject(hconn, INFINITE);

        // Read the console buffer
        if(!ReadConsole(hconn, buf, sizeof(buf), &bytes_read, NULL)) {
          PrintError("ReadConsole failed");
          quit  = TRUE;
        }
        if(bytes_read) {
          DWORD write;
          // Check for Esc key
          for(write=0; write < bytes_read; write++) {
    	// Terminate when Esc key is pressed
    	if(buf[write] == 0x1b) {
    	  quit = TRUE;
    	  break;
    	}
          }
          // Send data to the serial device
          if(write) {
    	if(!WriteFile(h, buf, write, &write, &ov)) {
    	  if(GetLastError() == ERROR_IO_PENDING) {
    	    if(!GetOverlappedResult(h, &ov, &write, TRUE)) {
    	      PrintError("GetOverlappedResult failed");
    	      quit = TRUE;
    	    }
    	  }
    	} else {
    	  PrintError("WriteFile failed");
    	  quit = TRUE;
    	}
          }
        }

      } while(!quit);

      // Signal the terminal thread to quit
      SetCommMask(h, 0);

      return 0;
    }

    void SerialRead(gxSerialComm *dev, char *dumpfile = 0)
    {
      DiskFileB outfile;
      if(dumpfile) {
        cout << "Writing output to the " << dumpfile << " file" << "\n";
        outfile.df_Open(dumpfile);
        if(!outfile) {
          cout << "\n";
          cout << "Cannot open the: " << dumpfile << " capture file"
    	   << "\n";
          cout << "Exiting..." << "\n";
          cout << "\n";
          return;
        }
      }

      HANDLE hconn = GetStdHandle(STD_OUTPUT_HANDLE);
      HANDLE h = dev->DeviceHandle();
      DWORD mask;
      DWORD id;
      OVERLAPPED ov;

      HANDLE hConsole = CreateThread(NULL, 0, ConsoleThread, h, 0, &id);
      if(hConsole == INVALID_HANDLE_VALUE) {
        PrintError("CreateThread failed");
        return;
      }
      CloseHandle(hConsole);

      ZeroMemory(&ov, sizeof(ov));

      // Create event for overlapped I/O
      ov.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
      if(ov.hEvent == INVALID_HANDLE_VALUE)
        PrintError("CreateEvent failed");

      // Wait for received characters
      if(!SetCommMask(h, EV_RXCHAR))
        PrintError("SetCommMask failed");

      while(1) {
        // Get the event mask
        if(!WaitCommEvent(h, &mask, &ov)) {
          DWORD e = GetLastError();
          if(e == ERROR_IO_PENDING) {
    	DWORD r;
    	if(!GetOverlappedResult(h, &ov, &r, TRUE)) {
    	  PrintError("GetOverlappedResult failed");
    	  break;
    	}
          } else {
    	PrintError("WaitCommEvent failed");
    	break;
          }
        }

        // If no event, then UI thread terminated with SetCommMask(h, 0)
        if(mask == 0) {
          break;
        }

        if(mask & EV_RXCHAR) {
          char buf[10];
          DWORD bytes_read;
          do {
    	bytes_read = 0;
    	if(!ReadFile(h, buf, sizeof(buf), &bytes_read, &ov)) {
    	  if(GetLastError() == ERROR_IO_PENDING) {
    	    if(!GetOverlappedResult(h, &ov, &bytes_read, TRUE)) {
    	      PrintError("GetOverlappedResult failed");
    	      break;
    	    }
    	  } else {
    	    PrintError("ReadFile failed");
    	    break;
    	  }
    	}
    	if(bytes_read) {
    	  if(dumpfile) { // Capture the data to a file
    	    outfile.df_Write((char *)buf, bytes_read);
    	    outfile.df_Flush();
    	  }
    	  else // Write the data to the console
    	    WriteFile(hconn, buf, bytes_read, &bytes_read, NULL);
    	}
          } while(bytes_read);
        }
        mask = 0;
      }
      outfile.df_Close();
      CloseHandle(ov.hEvent);  // Close the event
    }
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