1 files changed, 108 insertions, 0 deletions
diff --git a/libnitrokey/log.h b/libnitrokey/log.h
new file mode 100644
index 0000000..2a64bef
--- /dev/null
+++ b/libnitrokey/log.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2015-2018 Nitrokey UG
+ *
+ * This file is part of libnitrokey.
+ *
+ * libnitrokey is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * libnitrokey 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 Lesser General Public License
+ * along with libnitrokey. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0
+ */
+
+#ifndef LOG_H
+#define LOG_H
+
+#include <string>
+#include <functional>
+
+namespace nitrokey {
+  namespace log {
+
+//for MSVC
+#ifdef ERROR
+#undef ERROR
+#endif
+
+
+    enum class Loglevel : int {
+      ERROR,
+      WARNING,
+      INFO,
+      DEBUG_L1,
+      DEBUG,
+      DEBUG_L2
+    };
+
+    class LogHandler {
+    public:
+      virtual void print(const std::string &, Loglevel lvl) = 0;
+    protected:
+      std::string loglevel_to_str(Loglevel);
+      std::string format_message_to_string(const std::string &str, const Loglevel &lvl);
+
+    };
+
+    class StdlogHandler : public LogHandler {
+    public:
+      virtual void print(const std::string &, Loglevel lvl);
+    };
+
+    class FunctionalLogHandler : public LogHandler {
+      using log_function_type = std::function<void(std::string)>;
+      log_function_type log_function;
+    public:
+      FunctionalLogHandler(log_function_type _log_function);
+      virtual void print(const std::string &, Loglevel lvl);
+
+    };
+
+    extern StdlogHandler stdlog_handler;
+
+    class Log {
+    public:
+      Log() : mp_loghandler(&stdlog_handler), m_loglevel(Loglevel::WARNING) {}
+
+      static Log &instance() {
+        if (mp_instance == nullptr) mp_instance = new Log;
+        return *mp_instance;
+      }
+
+      void operator()(const std::string &, Loglevel);
+      void set_loglevel(Loglevel lvl) { m_loglevel = lvl; }
+      void set_handler(LogHandler *handler) { mp_loghandler = handler; }
+
+    private:
+      LogHandler *mp_loghandler;
+      Loglevel m_loglevel;
+      static std::string prefix;
+    public:
+      static void setPrefix(std::string prefix = std::string());
+
+    private:
+
+      static Log *mp_instance;
+    };
+  }
+}
+
+
+#ifdef NO_LOG
+#define LOG(string, level) while(false){}
+#define LOGD(string) while(false){}
+#else
+#define LOG(string, level) nitrokey::log::Log::instance()((string), (level))
+#define LOGD1(string) nitrokey::log::Log::instance()((string), (nitrokey::log::Loglevel::DEBUG_L1))
+#define LOGD(string) nitrokey::log::Log::instance()((string), (nitrokey::log::Loglevel::DEBUG_L2))
+#endif
+
+#endif