EOF reading in the buffer

This is a discussion on EOF reading in the buffer within the Windows Programming forums, part of the Platform Specific Boards category; Hi: If I want the program to know whether it is the end of data in the input buffer in ...

  1. #1
    Registered User
    Join Date
    Sep 2001
    Posts
    173

    EOF reading in the buffer

    Hi:

    If I want the program to know whether it is the end of data in the input buffer in the serial port. So I do:

    Code:
    DCB dcb={0};
    
    if(!GetCommState(hCom1, &dcb))  //get default dcb settings
      printf ("GetCommState is failed\n");
    
    dcb.EofChar = '3'; //want character '3' to indicate the end of     
                                  //the data in the input buffer
    
    if(!SetCommState(hCom1,&dcb)) //re-set the dcb
    {
        printf("%d\n",GetLastError());
        printf("SetCommState is failed\n");
    }
    but it didn't work, even if the string in the input buffer is, for example {'1','2','3','4'},

    but it still read the whole string, I think character '4' should be read at least. What's going on with this?? Thank you.
    Don't laugh at me,I am just a SuperNewbie.

  2. #2
    Registered User Codeplug's Avatar
    Join Date
    Mar 2003
    Posts
    4,645
    Don't count on that working.
    Either you know how many bytes to expect or you devise a protocal so that you know when to stop reading.

    gg

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