diff base/Debug.h @ 685:99222d4bfc78 debug-output

Add Debug class

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/base/Debug.h	Thu May 12 16:56:08 2011 +0100
@@ -0,0 +1,65 @@
+/* -*- 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 _DEBUG_H_
+#define _DEBUG_H_
+
+#include <QDebug>
+#include <QTextStream>
+#include <string>
+#include <iostream>
+
+class QString;
+class QUrl;
+
+QDebug &operator<<(QDebug &, const std::string &);
+std::ostream &operator<<(std::ostream &, const QString &);
+std::ostream &operator<<(std::ostream &, const QUrl &);
+
+#ifndef NDEBUG
+
+extern QDebug &getSVDebug();
+
+#define DEBUG getSVDebug()
+
+template <typename T>
+inline QDebug &operator<<(QDebug &d, const T &t) {
+    QString s;
+    QTextStream ts(&s);
+    ts << t;
+    d << s;
+    return d;
+}
+
+#else
+
+class NoDebug
+{
+public:
+    inline NoDebug() {}
+    inline ~NoDebug(){}
+
+    template <typename T>
+    inline NoDebug &operator<<(const T &) { return *this; }
+
+    inline NoDebug &operator<<(QTextStreamFunction) { return *this; }
+};
+
+#define DEBUG NoDebug()
+
+#endif /* !NDEBUG */
+
+#endif /* !_DEBUG_H_ */
+