--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Resources/Orthanc/Core/Logging.h	Wed Nov 09 20:06:52 2016 +0100
@@ -0,0 +1,127 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ *
+ * 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.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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/>.
+ **/
+
+
+#pragma once
+
+#include <iostream>
+
+#if !defined(ORTHANC_ENABLE_LOGGING)
+#  error The macro ORTHANC_ENABLE_LOGGING must be defined
+#endif
+
+namespace Orthanc
+{
+  namespace Logging
+  {
+    void Initialize();
+
+    void Finalize();
+
+    void Reset();
+
+    void Flush();
+
+    void EnableInfoLevel(bool enabled);
+
+    void EnableTraceLevel(bool enabled);
+
+    void SetTargetFile(const std::string& path);
+
+    void SetTargetFolder(const std::string& path);
+
+    struct NullStream : public std::ostream 
+    {
+      NullStream() : 
+        std::ios(0), 
+        std::ostream(0)
+      {
+      }
+      
+      std::ostream& operator<< (const std::string& message)
+      {
+        return *this;
+      }
+
+      // This overload fixes build problems with Visual Studio 2015
+      std::ostream& operator<< (const char* message)
+      {
+        return *this;
+      }
+    };
+  }
+}
+
+
+#if ORTHANC_ENABLE_LOGGING != 1
+
+#  define LOG(level)   ::Orthanc::Logging::NullStream()
+#  define VLOG(level)  ::Orthanc::Logging::NullStream()
+
+#else  /* ORTHANC_ENABLE_LOGGING == 1 */
+
+#  include <boost/thread/mutex.hpp>
+#  define LOG(level)  ::Orthanc::Logging::InternalLogger(#level,  __FILE__, __LINE__)
+#  define VLOG(level) ::Orthanc::Logging::InternalLogger("TRACE", __FILE__, __LINE__)
+
+namespace Orthanc
+{
+  namespace Logging
+  {
+    class InternalLogger
+    {
+    private:
+      boost::mutex::scoped_lock lock_;
+      NullStream                null_;
+      std::ostream*             stream_;
+
+    public:
+      InternalLogger(const char* level,
+                     const char* file,
+                     int line);
+
+      ~InternalLogger();
+      
+      std::ostream& operator<< (const std::string& message)
+      {
+        return (*stream_) << message;
+      }
+
+      // This overload fixes build problems with Visual Studio 2015
+      std::ostream& operator<< (const char* message)
+      {
+        return (*stream_) << message;
+      }
+    };
+  }
+}
+
+#endif  // ORTHANC_ENABLE_LOGGING