Added some comments to the code

utils/gtk_test.c

@@ -13,24 +13,26 @@
 
 void createGTKTestWindow(){
 
-	gtk_init(0, NULL);
+	gtk_init(0, NULL); //Init
 
-	builder = gtk_builder_new_from_file("glade/test_window.glade");
-	window = GTK_WIDGET(gtk_builder_get_object(builder, "window"));
-	g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
-	gtk_builder_connect_signals(builder, NULL);
+	builder = gtk_builder_new_from_file("glade/test_window.glade"); //Set builder
+	window = GTK_WIDGET(gtk_builder_get_object(builder, "window")); //Tell the window what to build
+	g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL); //Connect destroy signal
+	gtk_builder_connect_signals(builder, NULL); //Connect the signals to builder
 
+	//Init the widgets
 	fixed1 = GTK_WIDGET(gtk_builder_get_object(builder, "fixed1"));
 	button1 = GTK_WIDGET(gtk_builder_get_object(builder, "button1"));
 	label = GTK_WIDGET(gtk_builder_get_object(builder, "label"));
 	check = GTK_WIDGET(gtk_builder_get_object(builder, "check"));
 	level = GTK_WIDGET(gtk_builder_get_object(builder, "level"));
 
-	gtk_widget_show(window);
-	gtk_main();
+	gtk_widget_show(window); //Show the widgets
+	gtk_main(); //Create window
 	logger("[GTK] Window closed.");
 }
 
+//Set the level of the bar
 void setBarLevel(){
 	if(gtk_level_bar_get_value(GTK_LEVEL_BAR(level)) == 100){
 		gtk_label_set_text(GTK_LABEL(label), (const gchar*) "LEVEL UP!");
@@ -45,6 +47,7 @@ void setBarLevel(){
 	}
 }
 
+//Button event
 void on_button1_clicked(GtkButton *b){
 	gtk_label_set_text(GTK_LABEL(label), (const gchar*) "DO NOT PUSH THE BUUUTTTON");
 	logger("[GTK] Button 'button1' clicked.");
@@ -61,11 +64,13 @@ void on_gay_check_toggled(GtkToggleButton *t){
 	}
 }
 
+//Window-focus-loss event
 void on_window_focus_out_event(GtkWindow *w){
 	gtk_label_set_text(GTK_LABEL(label), (const gchar*) "HEY! COME BACK!");
 	logger("[GTK] Window focus lost.");
 }
 
+//Windows-focus-regain event
 void on_window_focus_in_event(GtkWindow *w){
 	gtk_label_set_text(GTK_LABEL(label), (const gchar*) "Welcome Back!");
 	logger("[GTK] Window regained focus.");

utils/logger.c

@@ -6,6 +6,7 @@
 
 char loggerDirPath[PATH_MAX];
 
+//Logs given message into output.log
 void logger(char message[512]){
 	FILE *log_file;
 	time_t t = time(NULL);

utils/sql_test.c

@@ -9,8 +9,8 @@
 
 void testSQLConnection(){
 
-	MYSQL *sql;
-	sql = mysql_init(NULL);
+	MYSQL *sql; //SQL connection
+	sql = mysql_init(NULL); //Init connection
 	char hostname[200];
 	unsigned int port;
 	char user[200];
@@ -28,17 +28,18 @@ void testSQLConnection(){
 	scanf("%s", &user);
 	password = getpass("Password: ");
 
+	//Try to connect with given data
 	if(mysql_real_connect(sql, hostname, user, password, database, 33000, NULL, 0) == NULL){
 		fprintf (stderr, "ERROR: mysql_real_connect():"
-        "%u (%s)\n",mysql_errno (sql), mysql_error (sql));
+        "%u (%s)\n",mysql_errno (sql), mysql_error (sql)); //On Error, print it
 		char buffer[1024];
 		snprintf(buffer, sizeof(buffer), "[ERROR] mysql_read_connect(): %u (%s)\n", mysql_errno(sql), mysql_error(sql));
 		logger(buffer);
-		mysql_close(sql);
+		mysql_close(sql); //Close connection
 	} else {
 		printf("Successfully connected to: %s", hostname);
 		logger("SQL Test Successful.");
 	}
 
-	mysql_close(sql);
+	mysql_close(sql); //Close connection
 }

utils/update_check.c

@@ -10,41 +10,42 @@ int checkForUpdate(char ver[10]){
     struct sockaddr_in server;
     char server_reply[2000];
 
-    //Create Socket
+    //Create socket
     sock = socket(AF_INET, SOCK_STREAM, 0);
     if( sock == -1){
         printf("Error while creating socket.");
         logger("Error while creating socket");
     }
     
-    server.sin_addr.s_addr = inet_addr("127.0.0.1");
+    server.sin_addr.s_addr = inet_addr("127.0.0.1"); //Set the IP address of the server
     server.sin_family = AF_INET;
-    server.sin_port = htons( 34000 );
+    server.sin_port = htons( 34000 ); //Set the server port
 
-    //Connect to Server
+    //Connect to server
     if(connect(sock, (struct sockaddr *)&server, sizeof(server)) < 0){
         perror("Error. Connnection to update server failed.");
         logger("[ERROR] Connection to update server failed.");
         return 1;
     }
-
-        if( send(sock, ver, strlen(ver), 0) < 0){
+    //Send message
+    if( send(sock, ver, strlen(ver), 0) < 0){
         puts("Error while communicating with server.");
         logger("[ERROR] Send to server failed.");
     }
-
+    //Receive response
     if( recv(sock, server_reply, 2000, 0) < 0){
         puts("Error while communicating with server.");
         logger("[ERROR] Receive from server failed.");
     }
+    //Say that client outdated
     if(!strcmp(server_reply, "VERSION_OUTDATED")){
         printf("\033[0;31mYour client is outdated. Please update your client.\033[0m\n");
         logger("[WARNING] Client is outdated.");
     }
-
+    //Say that client is up-to-date
     if(!strcmp(server_reply, "VERSION_OK")){
         logger("[INFO] Client is up-to-date.");
     }
-    close(sock);
+    close(sock); //Close the socket
     return 0;
 }