New git repository for release - version 0.2.0 tagged

node/Logger.hpp

@@ -0,0 +1,90 @@
+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2012-2013  ZeroTier Networks LLC
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+#ifndef _ZT_LOGGER_HPP
+#define _ZT_LOGGER_HPP
+
+#include <stdio.h>
+#include <string>
+#include <stdexcept>
+#include "NonCopyable.hpp"
+#include "Mutex.hpp"
+
+#undef LOG
+#define LOG(f,...) if (_r->log) _r->log->log(f,##__VA_ARGS__)
+
+#undef TRACE
+#ifdef ZT_TRACE
+#define TRACE(f,...) if (_r->log) _r->log->trace(__FILE__,__LINE__,f,##__VA_ARGS__)
+#else
+#define TRACE(f,...) {}
+#endif
+
+namespace ZeroTier {
+
+/**
+ * Utility for outputting logs to a file or stdout/stderr
+ */
+class Logger : NonCopyable
+{
+public:
+	/**
+	 * Construct a logger to log to a file or stdout
+	 * 
+	 * If a path is supplied to log to a file, maxLogSize indicates the size
+	 * at which this file is closed, renamed to .old, and then a new log is
+	 * opened (essentially a log rotation). If stdout is used, this is ignored.
+	 *
+	 * @param p Path to log to or NULL to use stdout
+	 * @param prefix Prefix to prepend to log lines or NULL for none
+	 * @param maxLogSize Maximum log size (0 for no limit)
+	 */
+	Logger(const char *p,const char *prefix,unsigned long maxLogSize);
+	~Logger();
+
+	void log(const char *fmt,...);
+
+#ifdef ZT_TRACE
+	void trace(const char *module,unsigned int line,const char *fmt,...);
+#else
+	inline void trace(const char *module,unsigned int line,const char *fmt,...) {}
+#endif
+
+private:
+	void _rotateIfNeeded();
+
+	std::string _path;
+	std::string _prefix;
+	unsigned long _maxLogSize;
+	Mutex _log_m;
+	FILE *_log;
+};
+
+} // namespace ZeroTier
+
+#endif
+