merge changes from the defunct ubot

ext/crlib/cr-logger.h

@@ -0,0 +1,108 @@
+//
+// CRLib - Simple library for STL replacement in private projects.
+// Copyright © 2020 YaPB Development Team <team@yapb.ru>.
+//
+// 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.
+// 
+
+#pragma once
+
+#include <time.h>
+
+#include <crlib/cr-files.h>
+#include <crlib/cr-lambda.h>
+
+CR_NAMESPACE_BEGIN
+
+class SimpleLogger final : public Singleton <SimpleLogger> {
+public:
+   using PrintFunction = Lambda <void (const char *)>;
+
+private:
+   File handle_;
+   PrintFunction printFun_;
+
+public:
+   SimpleLogger () = default;
+
+   ~SimpleLogger () {
+      handle_.close ();
+   }
+
+private:
+   void logToFile (const char *level, const char *msg) {
+      if (!handle_) {
+         return;
+      }
+      time_t ticks = time (&ticks);
+      tm *timeinfo = nullptr;
+
+#if defined (CR_WINDOWS)
+      tm get;
+
+      localtime_s (&get, &ticks);
+      timeinfo = &get;
+#else
+      timeinfo = localtime (&ticks);
+#endif
+
+      auto timebuf = strings.chars ();
+      strftime (timebuf, StringBuffer::StaticBufferSize, "%Y-%m-%d %H:%M:%S", timeinfo);
+
+      handle_.puts ("%s (%s): %s\n", timebuf, level, msg);
+   }
+
+public:
+   template <typename ...Args> void fatal (const char *fmt, Args &&...args) {
+      auto msg = strings.format (fmt, cr::forward <Args> (args)...);
+
+      logToFile ("FATAL", msg);
+
+      if (printFun_) {
+         printFun_ (msg);
+      }
+      plat.abort (msg);
+   }
+
+   template <typename ...Args> void error (const char *fmt, Args &&...args) {
+      auto msg = strings.format (fmt, cr::forward <Args> (args)...);
+
+      logToFile ("ERROR", msg);
+
+      if (printFun_) {
+         printFun_ (msg);
+      }
+   }
+
+   template <typename ...Args> void message (const char *fmt, Args &&...args) {
+      auto msg = strings.format (fmt, cr::forward <Args> (args)...);
+
+      logToFile ("INFO", msg);
+
+      if (printFun_) {
+         printFun_ (msg);
+      }
+   }
+
+public:
+   void initialize (StringRef filename, PrintFunction printFunction) {
+      if (handle_) {
+         handle_.close ();
+      }
+      printFun_ = cr::move (printFunction);
+      handle_.open (filename, "at");
+   }
+};
+
+// expose global instance
+CR_EXPOSE_GLOBAL_SINGLETON (SimpleLogger, logger);
+
+CR_NAMESPACE_END