Merge pull request #455 from pollend/feature/add-support-ansi-stdout-logging

feat: added ansi color stdout logging

@pollend I hope you don't ming the changes I did

Author: devshgraphicsprogramming

include/nbl/system/CColoredStdoutLoggerANSI.h

@@ -0,0 +1,49 @@
+#ifndef _NBL_SYSTEM_C_COLORED_STDOUT_LOGGER_ANSI_INCLUDED_
+#define _NBL_SYSTEM_C_COLORED_STDOUT_LOGGER_ANSI_INCLUDED_
+
+#include "nbl/system/IThreadsafeLogger.h"
+
+#include <string_view>
+
+namespace nbl::system
+{
+
+// logging using ANSI escape codes
+class NBL_API2 CColoredStdoutLoggerANSI : public IThreadsafeLogger
+{
+  public:
+    CColoredStdoutLoggerANSI(core::bitflag<E_LOG_LEVEL> logLevelMask = ILogger::defaultLogMask()) : IThreadsafeLogger(logLevelMask) {}
+
+  private:
+    // more info about how this works: https://gist.github.com/fnky/458719343aabd01cfb17a3a4f7296797
+    virtual void threadsafeLog_impl(const std::string_view &fmt, E_LOG_LEVEL logLevel, va_list args) override
+    {
+      auto str = constructLogString(fmt, logLevel, args);
+      switch (logLevel)
+      {
+        case ELL_DEBUG:
+          printf("\x1b[37m%s", str.data()); // White
+          break;
+        case ELL_INFO:
+          printf("\x1b[37m%s", str.data()); // White
+          break;
+        case ELL_WARNING:
+          printf("\x1b[33m%s", str.data()); // yellow
+          break;
+        case ELL_ERROR:
+          printf("\x1b[31m%s", str.data()); // red
+          break;
+        case ELL_PERFORMANCE:
+          printf("\x1b[34m%s", str.data()); // blue
+          break;
+        case ELL_NONE:
+          assert(false);
+          break;
+      }
+      fflush(stdout);
+    }
+};
+
+} // namespace nbl::system
+
+#endif