Re: cxx0017: ... symbol not found VC++6

From:
"HMS Surprise" <john@datavoiceint.com>
Newsgroups:
microsoft.public.vc.language
Date:
5 Feb 2007 07:25:35 -0800
Message-ID:
<1170689135.807837.154630@m58g2000cwm.googlegroups.com>

Some example code would be helpful to us.


At line after the comment

        //CXX0017
the variables bytesRead and workingBufIndex are listed in watch1 as
not found. Perhaps because they are static?

Thanks,
jh

//
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// debug version of getSentence
//

#include <stdafx.h>
#include <iostream>

extern "C"
{
//#include "hidsdi.h"
}

using namespace std;

//int readPuck(char* buffer, int timeout, int = 10);

const char START_SENTINEL = '$';
const char STOP_SENTINEL = '@';

char newBuf[34]; //Make new when instantiating, size of input report
size +1
char workingBuf[34];

// Simple overview: Search input from puck till $ is found, copy it
and following characters until
// newline \n is found. GPS sentence is nulled terminated and placed
at *outString.

void
getSentence(char* outString)
{

    static int workingBufIndex; //Where we stopped scanning when we got a
\n.
    static int bytesRead = 0; //How many bytes fn readPuck read, must
persist between calls.
    static bool firstTime = true;
    char* pc = outString;

    // First time thru.
    if(firstTime == true)
    {
        firstTime = false;
        workingBufIndex = 0;

        //Get a bufferful of data from device.
        //if(!(bytesRead = readPuck(workingBuf, 100)))
        {
            //####Got an error, scream, shout, and dash about.
            //####Return an error code of some sort.
        }
    }

    //
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    // At this point should be pointing at workingBuf at the point of the
    // terminating \n or at its beginning if this is first time thru this
function.
    // If at the end of workingBuf (workingBufIndex == bytesRead), read
new data in
    // from device.
    // Start where left off in last buffer and throw away anything but a
$. If the
    // buffer end is reached before a $ is found the device should be
read again.
    // When $ is found copy it then move to a copy loop.
    //
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    // Look for start sentinel in the current buffer. If at end of
buffer, read the
    // puck again.

    bool startSentinelFound = false;
    while(startSentinelFound == false) //#### && haven't been looking too
long.
    {
        // First check for end of buffer and read input buffer (newBuf) if
necessary.
        cout << "wbi: " << workingBufIndex << " bytesRead: " << bytesRead <<
endl;

        //CXX0017
        if(workingBufIndex == bytesRead) // At end of buffer from previous
loop or
        { // sentinel search above.
            //Read newBuf until it has fresh data, not same as already in
workingBuf.

            workingBufIndex = 0; //Reset to beginning , fetching a new
bufferful.
            bool same = true;

            while(same == true) //###?limit time allowed for searching for new
data.

            {
                // Read a bufferful of new characters into newBuf and make sure it
is not
                // the same as what is already in workingBuf. Go ahead and copy
in
                // the process of checking as it doesn't hurt.

                //bytesRead = readPuck(newBuf, 100);

                for(int i = 0; i < bytesRead; i++)
                {
                    if(workingBuf[i] != newBuf[i]) same = false;
                    workingBuf[i] = newBuf[i];
                }
            }
        }// Finished getting newBuf and copying into workingBuf, and it is
new data.

        //Look for start sentinel
        if(workingBuf[workingBufIndex++] == START_SENTINEL)
        {
            *(pc++) = START_SENTINEL;
            startSentinelFound = true;
        }

    } // End of while(startSentinelFound == false) -- Finally made our
first buck.
}

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