Added file logger

1 files changed, 141 insertions, 0 deletions

diff --git a/logger/QsLog.cpp b/logger/QsLog.cpp
new file mode 100644
index 00000000..b2a7f465
--- /dev/null
+++ b/logger/QsLog.cpp
@@ -0,0 +1,141 @@
+// 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.
+
+#include "QsLog.h"
+#include "QsLogDest.h"
+#include <QMutex>
+#include <QList>
+#include <QDateTime>
+#include <QtGlobal>
+#include <cassert>
+#include <cstdlib>
+#include <stdexcept>
+
+namespace QsLogging
+{
+typedef QList<Destination *> DestinationList;
+
+static const char *LevelStrings[] = {"TRACE", "DEBUG", "INFO", "WARN", "ERROR", "FATAL"
+																				"UNKNOWN"};
+
+// not using Qt::ISODate because we need the milliseconds too
+static const QString fmtDateTime("hhhh:mm:ss.zzz");
+
+static const char *LevelToText(Level theLevel)
+{
+	if (theLevel > FatalLevel)
+	{
+		assert(!"bad log level");
+		return LevelStrings[UnknownLevel];
+	}
+	return LevelStrings[theLevel];
+}
+
+class LoggerImpl
+{
+public:
+	LoggerImpl() : level(InfoLevel), start_time(QDateTime::currentDateTime())
+	{
+	}
+	QMutex logMutex;
+	Level level;
+	DestinationList destList;
+	QDateTime start_time;
+};
+
+Logger::Logger() : d(new LoggerImpl)
+{
+}
+
+Logger::~Logger()
+{
+	delete d;
+}
+
+void Logger::addDestination(Destination *destination)
+{
+	assert(destination);
+	d->destList.push_back(destination);
+}
+
+void Logger::setLoggingLevel(Level newLevel)
+{
+	d->level = newLevel;
+}
+
+Level Logger::loggingLevel() const
+{
+	return d->level;
+}
+
+//! creates the complete log message and passes it to the logger
+void Logger::Helper::writeToLog()
+{
+	const char *const levelName = LevelToText(level);
+	const QString completeMessage(QString("%1\t%2\t%3")
+									  .arg(QDateTime::currentDateTime().toString(fmtDateTime))
+									  .arg(levelName, 5)
+									  .arg(buffer));
+
+	Logger &logger = Logger::instance();
+	QMutexLocker lock(&logger.d->logMutex);
+	logger.write(completeMessage);
+}
+
+Logger::Helper::Helper(Level logLevel) : level(logLevel), qtDebug(&buffer)
+{
+}
+
+Logger::Helper::~Helper()
+{
+	try
+	{
+		writeToLog();
+	}
+	catch (std::exception &e)
+	{
+		// you shouldn't throw exceptions from a sink
+		Q_UNUSED(e);
+		assert(!"exception in logger helper destructor");
+		throw;
+	}
+}
+
+//! sends the message to all the destinations
+void Logger::write(const QString &message)
+{
+	for (DestinationList::iterator it = d->destList.begin(), endIt = d->destList.end();
+		 it != endIt; ++it)
+	{
+		if (!(*it))
+		{
+			assert(!"null log destination");
+			continue;
+		}
+		(*it)->write(message);
+	}
+}
+
+} // end namespace