Clang: Rename CodeModelBackEnd in ClangBackEnd

Change-Id: I13e8a458634110456375956d4d4da7239c86957f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/libs/clangbackendipc/readcommandblock.cpp

@@ -0,0 +1,113 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://www.qt.io/licensing.  For further information
+** use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "readcommandblock.h"
+
+#include <QDataStream>
+#include <QIODevice>
+#include <QVariant>
+#include <QtDebug>
+
+namespace ClangBackEnd {
+
+ReadCommandBlock::ReadCommandBlock(QIODevice *ioDevice)
+    : ioDevice(ioDevice),
+      commandCounter(0),
+      blockSize(0)
+{
+}
+
+void ReadCommandBlock::checkIfCommandIsLost(QDataStream &in)
+{
+    qint64 currentCommandCounter;
+
+    in >> currentCommandCounter;
+
+#ifndef DONT_CHECK_COMMAND_COUNTER
+    bool commandLost = !((currentCommandCounter == 0 && commandCounter == 0) || (commandCounter + 1 == currentCommandCounter));
+    if (commandLost)
+        qWarning() << "client command lost: " << commandCounter <<  currentCommandCounter;
+#endif
+
+    commandCounter = currentCommandCounter;
+}
+
+QVariant ReadCommandBlock::read()
+{
+    QDataStream in(ioDevice);
+
+    QVariant command;
+
+    if (isTheWholeCommandReadable(in)) {
+        checkIfCommandIsLost(in);
+        in >> command;
+    }
+
+    return command;
+}
+
+QVector<QVariant> ReadCommandBlock::readAll()
+{
+    QVector<QVariant> commands;
+
+    while (true) {
+        const QVariant command = read();
+        if (command.isValid())
+            commands.append(command);
+        else
+            return commands;
+    }
+
+    Q_UNREACHABLE();
+}
+
+void ReadCommandBlock::resetCounter()
+{
+    commandCounter = 0;
+}
+
+bool ReadCommandBlock::isTheWholeCommandReadable(QDataStream &in)
+{
+    if (ioDevice->bytesAvailable() == 0)
+        return false;
+
+    if (blockSize == 0)
+        in >> blockSize;
+
+    if (ioDevice->bytesAvailable() < blockSize)
+        return false;
+
+    blockSize = 0;
+
+    return true;
+}
+
+} // namespace ClangBackEnd
+