Poco FIFOBuffer read() error

Question

I am having trouble getting Poco::FIFOBuffer.read() to work. Either getting access violation errors or stack around the variable result was corrupted.

    std::string output;

    Poco::FIFOBuffer recvData(BUFFERLEN);

    int iResult = mySockets[vect[2]]->receiveBytes(recvData);
    char* result = "";

    std::cout << recvData.read(result, recvData.size());
    output = result;

elswhere in the program a very similar thing seems to work fine (vect is a vector ) mySockets is a Map

Poco::FIFOBuffer sendData(BUFFERLEN, false);
sendData.copy(vect[3].c_str(), vect[3].size());
int iResult = mySockets[vect[2]]->sendBytes(sendData);
output = "data sent, sendBytes returned: " + std::to_string(iResult);

reference:http://pocoproject.org/docs-1.5.0/Poco.BasicFIFOBuffer.html#11400

Answer 1

As stated in the comment above, the documentation is wrong.

If you want the buffer to be automatically resized use Poco::Buffer<char>; alternatively, make sure that the char* points to enough space to accommodate the data (which is tricky - you'll have to query the FIFOBuffer to find out how much did receiveBytes() call return, so using Poco::Buffer is an easier option).