annotate base/Debug.h @ 1247:8f076d02569a piper

Make SVDEBUG always write to a log file -- formerly this was disabled in NDEBUG builds. I think there's little use to that, it just means that we keep adding more cerr debug output because we aren't getting the log we need. And SVDEBUG logging is not usually used in tight loops, I don't think the performance overhead is too serious.

Also update the About box.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2010-2011 Chris Cannam and QMUL.
    
    This program 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 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef SV_DEBUG_H
#define SV_DEBUG_H

#include <QDebug>
#include <QTextStream>

#include "RealTime.h"

#include <string>
#include <iostream>
#include <fstream>

class QString;
class QUrl;

QDebug &operator<<(QDebug &, const std::string &);
std::ostream &operator<<(std::ostream &, const QString &);
std::ostream &operator<<(std::ostream &, const QUrl &);

using std::cout;
using std::cerr;
using std::endl;

class SVDebug {
public:
    SVDebug();
    ~SVDebug();

    template <typename T>
    inline SVDebug &operator<<(const T &t) {
        if (m_ok) {
            if (m_eol) {
                m_stream << m_prefix << " ";
            }
            m_stream << t;
            m_eol = false;
        }
        return *this;
    }

    inline SVDebug &operator<<(QTextStreamFunction) {
        m_stream << std::endl;
        m_eol = true;
        return *this;
    }

private:
    std::fstream m_stream;
    char *m_prefix;
    bool m_ok;
    bool m_eol;
};

extern SVDebug &getSVDebug();

#define SVDEBUG getSVDebug()

#endif /* !_DEBUG_H_ */