Added file logger

1 files changed, 130 insertions, 0 deletions

diff --git a/logger/QsLog.h b/logger/QsLog.h
new file mode 100644
index 00000000..a18c08de
--- /dev/null
+++ b/logger/QsLog.h
@@ -0,0 +1,130 @@
+// Copyright (c) 2010, Razvan Petru
+// All rights reserved.
+
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+
+// * Redistributions of source code must retain the above copyright notice, this
+//   list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright notice, this
+//   list of conditions and the following disclaimer in the documentation and/or other
+//   materials provided with the distribution.
+// * The name of the contributors may not be used to endorse or promote products
+//   derived from this software without specific prior written permission.
+
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+// OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+#include <QDebug>
+#include <QString>
+
+namespace QsLogging
+{
+class Destination;
+enum Level
+{
+	TraceLevel = 0,
+	DebugLevel,
+	InfoLevel,
+	WarnLevel,
+	ErrorLevel,
+	FatalLevel,
+	UnknownLevel
+};
+
+class LoggerImpl; // d pointer
+class Logger
+{
+public:
+	static Logger &instance()
+	{
+		static Logger staticLog;
+		return staticLog;
+	}
+
+	//! Adds a log message destination. Don't add null destinations.
+	void addDestination(Destination *destination);
+	//! Logging at a level < 'newLevel' will be ignored
+	void setLoggingLevel(Level newLevel);
+	//! The default level is INFO
+	Level loggingLevel() const;
+
+	//! The helper forwards the streaming to QDebug and builds the final
+	//! log message.
+	class Helper
+	{
+	public:
+		explicit Helper(Level logLevel);
+		~Helper();
+		QDebug &stream()
+		{
+			return qtDebug;
+		}
+
+	private:
+		void writeToLog();
+
+		Level level;
+		QString buffer;
+		QDebug qtDebug;
+	};
+
+private:
+	Logger();
+	Logger(const Logger &);
+	Logger &operator=(const Logger &);
+	~Logger();
+
+	void write(const QString &message);
+
+	LoggerImpl *d;
+};
+
+} // end namespace
+
+#define QLOG_TRACE()                                                                           \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::TraceLevel)                 \
+	QsLogging::Logger::Helper(QsLogging::TraceLevel).stream()
+#define QLOG_DEBUG()                                                                           \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::DebugLevel)                 \
+	QsLogging::Logger::Helper(QsLogging::DebugLevel).stream()
+#define QLOG_INFO()                                                                            \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::InfoLevel)                  \
+	QsLogging::Logger::Helper(QsLogging::InfoLevel).stream()
+#define QLOG_WARN()                                                                            \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::WarnLevel)                  \
+	QsLogging::Logger::Helper(QsLogging::WarnLevel).stream()
+#define QLOG_ERROR()                                                                           \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::ErrorLevel)                 \
+	QsLogging::Logger::Helper(QsLogging::ErrorLevel).stream()
+#define QLOG_FATAL() QsLogging::Logger::Helper(QsLogging::FatalLevel).stream()
+
+/*
+#define QLOG_TRACE()                                                                           \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::TraceLevel)                 \
+	QsLogging::Logger::Helper(QsLogging::TraceLevel).stream() << __FILE__ << '@' << __LINE__
+#define QLOG_DEBUG()                                                                           \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::DebugLevel)                 \
+	QsLogging::Logger::Helper(QsLogging::DebugLevel).stream() << __FILE__ << '@' << __LINE__
+#define QLOG_INFO()                                                                            \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::InfoLevel)                  \
+	QsLogging::Logger::Helper(QsLogging::InfoLevel).stream() << __FILE__ << '@' << __LINE__
+#define QLOG_WARN()                                                                            \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::WarnLevel)                  \
+	QsLogging::Logger::Helper(QsLogging::WarnLevel).stream() << __FILE__ << '@' << __LINE__
+#define QLOG_ERROR()                                                                           \
+	if (QsLogging::Logger::instance().loggingLevel() <= QsLogging::ErrorLevel)                 \
+	QsLogging::Logger::Helper(QsLogging::ErrorLevel).stream() << __FILE__ << '@' << __LINE__
+#define QLOG_FATAL()                                                                           \
+	QsLogging::Logger::Helper(QsLogging::FatalLevel).stream() << __FILE__ << '@' << __LINE__
+*/
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