From 7d0b17ba882172edff04f3c60bdf8cd6ba42c150 Mon Sep 17 00:00:00 2001
From: JoelKatz <DavidJoelSchwartz@GMail.com>
Date: Thu, 31 May 2012 16:59:58 -0700
Subject: [PATCH] Trivial logging subsystem.

---
 src/Log.cpp | 38 ++++++++++++++++++++++++++++++++++++++
 src/Log.h   | 45 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)
 create mode 100644 src/Log.cpp
 create mode 100644 src/Log.h

diff --git a/src/Log.cpp b/src/Log.cpp
new file mode 100644
index 0000000000..ded888a6d6
--- /dev/null
+++ b/src/Log.cpp
@@ -0,0 +1,38 @@
+
+#include "Log.h"
+
+#include <boost/date_time/posix_time/posix_time.hpp>
+
+boost::recursive_mutex Log::sLock;
+
+#ifdef DEBUG
+LogSeverity Log::sMinSeverity = lsTRACE;
+#else
+LogSeverity Log::sMinSeverity = lsINFO;
+#endif
+
+Log::~Log()
+{
+	std::string logMsg = boost::posix_time::to_simple_string(boost::posix_time::second_clock::universal_time());
+	switch (mSeverity)
+	{
+		case lsTRACE:	logMsg += " TRAC "; break;
+		case lsDEBUG:	logMsg += " DEBG "; break;
+		case lsINFO:	logMsg += " INFO "; break;
+		case lsWARNING:	logMsg += " WARN "; break;
+		case lsERROR:	logMsg += " EROR "; break;
+		case lsFATAL:	logMsg += " FATL "; break;
+	}
+	logMsg += oss.str();
+	boost::recursive_mutex::scoped_lock sl(sLock);
+	if (mSeverity >= sMinSeverity)
+	{
+		std::cerr << logMsg << std::endl;
+	}
+}
+
+void Log::setMinSeverity(LogSeverity s)
+{
+	boost::recursive_mutex::scoped_lock sl(sLock);
+	sMinSeverity = s;
+}
diff --git a/src/Log.h b/src/Log.h
new file mode 100644
index 0000000000..65615e0fcd
--- /dev/null
+++ b/src/Log.h
@@ -0,0 +1,45 @@
+#ifndef __LOG__
+#define __LOG__
+
+#include <sstream>
+
+#include <boost/thread/recursive_mutex.hpp>
+
+enum LogSeverity
+{
+	lsTRACE		= 0,
+	lsDEBUG		= 1,
+	lsINFO		= 2,
+	lsWARNING	= 3,
+	lsERROR		= 4,
+	lsFATAL		= 5
+};
+
+class Log
+{
+private:
+	Log(const Log&);			// no implementation
+	Log& operator=(const Log&);	// no implementation
+
+protected:
+	static boost::recursive_mutex sLock;
+	static LogSeverity sMinSeverity;
+
+	mutable std::ostringstream oss;
+	LogSeverity mSeverity;
+
+public:
+	Log(LogSeverity s) : mSeverity(s)
+	{ ;	}
+
+	~Log();
+
+	template<typename T> std::ostream& operator<<(const T& t) const
+	{
+		return oss << t;
+	}
+
+	static void setMinSeverity(LogSeverity);
+};
+
+#endif