Added socket data transfer

Added one common class used to transfer data using socket. This class is
used both from the Octave plugins and from the socket server code in
ResInsight

ApplicationCode/SocketInterface/RiaSocketDataTransfer.cpp

@@ -0,0 +1,102 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) Statoil ASA, Ceetron Solutions AS
+// 
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+// 
+//  ResInsight 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 General Public License at <http://www.gnu.org/licenses/gpl.html> 
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#include "RiaSocketDataTransfer.h"
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool RiaSocketDataTransfer::writeBlockDataToSocket(QTcpSocket* socket, const char* data, quint64 bytesToWrite, QStringList& errorMessages)
+{
+    quint64 bytesWritten = 0;
+    int blockCount = 0;
+
+    quint64 maxBlockSize = doubleValueCountInBlock() * sizeof(double);
+
+    while (bytesWritten < bytesToWrite)
+    {
+        quint64 byteCountToWrite = qMin(bytesToWrite - bytesWritten, maxBlockSize);
+
+        qint64 actuallyBytesWritten = socket->write(data + bytesWritten, byteCountToWrite);
+        if (actuallyBytesWritten < 0)
+        {
+            errorMessages.push_back("Error detected when writing data, error string from socket");
+            errorMessages.push_back(socket->errorString());
+
+            return false;
+        }
+
+        bytesWritten += actuallyBytesWritten;
+
+        blockCount++;
+    }
+
+    return true;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool RiaSocketDataTransfer::readBlockDataFromSocket(QTcpSocket* socket, char* data, quint64 bytesToRead, QStringList& errorMessages)
+{
+    quint64 bytesRead = 0;
+    int blockCount = 0;
+
+    quint64 maxBlockSize = doubleValueCountInBlock() * sizeof(double);
+
+    while (bytesRead < bytesToRead)
+    {
+        if (socket->bytesAvailable())
+        {
+            quint64 byteCountToRead = qMin(bytesToRead - bytesRead, maxBlockSize);
+
+            qint64 actuallyBytesRead = socket->read(data + bytesRead, byteCountToRead);
+            if (actuallyBytesRead < 0)
+            {
+                errorMessages.push_back("Error detected when reading data, error string from socket");
+                errorMessages.push_back(socket->errorString());
+
+                return false;
+            }
+
+            bytesRead += actuallyBytesRead;
+            blockCount++;
+        }
+        else
+        {
+            if (!socket->waitForReadyRead())
+            {
+                errorMessages.push_back("Waited for data for %1 milli seconds.");
+                errorMessages.push_back(socket->errorString());
+
+                return false;
+            }
+        }
+    }
+
+    return true;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+size_t RiaSocketDataTransfer::doubleValueCountInBlock()
+{
+    return 2000;
+}
+