/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. 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.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef TRACE_H
#define TRACE_H

#include <QtCore/QDebug>

#define ENABLE_TRACE
//#define VERBOSE_TRACE

namespace Trace {

class NullDebug
{
public:
    template <typename T>
    NullDebug& operator<<(const T&) { return *this; }
};

inline NullDebug nullDebug() { return NullDebug(); }

template <typename T>
struct PtrWrapper
{
    PtrWrapper(const T *ptr) : m_ptr(ptr) { }
    const T *const m_ptr;
};

} // namespace Trace

template <typename T>
inline QDebug& operator<<(QDebug &debug, const Trace::PtrWrapper<T> &wrapper)
{
    QDebugStateSaver saver(debug);
    debug.nospace() << '[' << static_cast<const void *>(wrapper.m_ptr) << ']';
    return debug;
}

template<typename T>
inline const void *qtVoidPtr(const T *ptr)
{ return static_cast<const void *>(ptr); }

#define qtThisPtr() qtVoidPtr(this)

#ifdef ENABLE_TRACE
        inline QDebug qtTrace() { return qDebug() << "[qmlvideo]"; }
#    ifdef VERBOSE_TRACE
        inline QDebug qtVerboseTrace() { return qtTrace(); }
#    else
        inline Trace::NullDebug qtVerboseTrace() { return Trace::nullDebug(); }
#    endif
#else
    inline Trace::NullDebug qtTrace() { return Trace::nullDebug(); }
    inline Trace::NullDebug qtVerboseTrace() { return Trace::nullDebug(); }
#endif

#endif // TRACE_H
