raysan5.raylib/examples/core/core_custom_logging.c

/*******************************************************************************************
*
*   raylib [core] example - Custom logging
*
*   This example has been created using raylib 2.1 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Copyright (c) 2018 Ramon Santamaria (@raysan5) and Pablo Marcos Oltra (@pamarcos)
*
********************************************************************************************/

#include "raylib.h"

#include <stdio.h>                  // Required for: fopen(), fclose(), fputc(), fwrite(), printf(), fprintf(), funopen()
#include <time.h>                   // Required for: time_t, tm, time(), localtime(), strftime()

// Custom logging funtion
void LogCustom(int msgType, const char *text, va_list args)
{
	char timeStr[64];
	time_t now = time(NULL);
	struct tm *tm_info = localtime(&now);

	strftime(timeStr, sizeof(timeStr), "%Y-%m-%d %H:%M:%S", tm_info);
	printf("[%s] ", timeStr);

	switch (msgType)
	{
		case LOG_INFO: printf("[INFO] : "); break;
		case LOG_ERROR: printf("[ERROR]: "); break;
		case LOG_WARNING: printf("[WARN] : "); break;
		case LOG_DEBUG: printf("[DEBUG]: "); break;
		default: break;
	}
    
	vprintf(text, args);
	printf("\n");
}

int main(int argc, char* argv[])
{
	// Initialization
	//--------------------------------------------------------------------------------------
	int screenWidth = 800;
	int screenHeight = 450;

	// First thing we do is setting our custom logger to ensure everything raylib logs
	// will use our own logger instead of its internal one
	SetTraceLogCallback(LogCustom);

	InitWindow(screenWidth, screenHeight, "raylib [core] example - custom logging");

	SetTargetFPS(60);
	//--------------------------------------------------------------------------------------

	// Main game loop
	while (!WindowShouldClose())    // Detect window close button or ESC key
	{
		// Update
		//----------------------------------------------------------------------------------
		// TODO: Update your variables here
		//----------------------------------------------------------------------------------

		// Draw
		//----------------------------------------------------------------------------------
		BeginDrawing();

		ClearBackground(RAYWHITE);

		DrawText("Check out the console output to see the custom logger in action!", 60, 200, 20, LIGHTGRAY);

		EndDrawing();
		//----------------------------------------------------------------------------------
	}

	// De-Initialization
	//--------------------------------------------------------------------------------------
	CloseWindow();        // Close window and OpenGL context
	//--------------------------------------------------------------------------------------

	return 0;
}