--- lbbs/src/editor.c	2025/10/14 02:39:34	1.46
+++ lbbs/src/editor.c	2025/10/18 12:06:10	1.48
@@ -504,14 +504,14 @@ int editor_data_delete(EDITOR_DATA *p_ed
 	{
 		str_len = 1;
 	}
-	else if (p_data_line[offset_data_line] & 0b10000000) // head of multi-byte character
+	else if (p_data_line[offset_data_line] & 0x80) // head of multi-byte character
 	{
 		str_len = 1;
-		c = (p_data_line[offset_data_line] & 0b01110000) << 1;
-		while (c & 0b10000000)
+		c = (p_data_line[offset_data_line] & 0x70) << 1;
+		while (c & 0x80)
 		{
 			str_len++;
-			c = (c & 0b01111111) << 1;
+			c = (c & 0x7f) << 1;
 		}
 	}
 	else
@@ -705,23 +705,28 @@ int editor_display(EDITOR_DATA *p_editor
 			ch = igetch_t(MAX_DELAY_TIME);
 			while (!SYS_server_exit)
 			{
+				if (ch != KEY_NULL && ch != KEY_TIMEOUT)
+				{
+					BBS_last_access_tm = time(NULL);
+				}
+
 				// extended key handler
 				if (editor_display_key_handler(&ch, &ctx) != 0)
 				{
 					goto cleanup;
 				}
 
-				if (ch < 256 && (ch & 0b10000000)) // head of multi-byte character
+				if (ch < 256 && (ch & 0x80)) // head of multi-byte character
 				{
 					str_len = 0;
-					c = (char)(ch & 0b11110000);
-					while (c & 0b10000000)
+					c = (char)(ch & 0xf0);
+					while (c & 0x80)
 					{
 						input_str[str_len] = (char)(ch - 256);
 						str_len++;
-						c = (c & 0b01111111) << 1;
+						c = (c & 0x7f) << 1;
 
-						if ((c & 0b10000000) == 0) // Input completed
+						if ((c & 0x80) == 0) // Input completed
 						{
 							break;
 						}
@@ -742,8 +747,6 @@ int editor_display(EDITOR_DATA *p_editor
 				if ((ch >= 32 && ch < 127) || str_len >= 2 || // Printable character or multi-byte character
 					ch == CR || ch == KEY_ESC)				  // Special character
 				{
-					BBS_last_access_tm = time(NULL);
-
 					// Refresh current action while user input
 					if (user_online_update(NULL) < 0)
 					{
@@ -837,8 +840,6 @@ int editor_display(EDITOR_DATA *p_editor
 				}
 				else if (ch == KEY_DEL || ch == BACKSPACE) // Del
 				{
-					BBS_last_access_tm = time(NULL);
-
 					// Refresh current action while user input
 					if (user_online_update(NULL) < 0)
 					{
@@ -930,7 +931,10 @@ int editor_display(EDITOR_DATA *p_editor
 				switch (ch)
 				{
 				case KEY_NULL:
+					log_error("KEY_NULL\n");
+					goto cleanup;
 				case KEY_TIMEOUT:
+					log_error("User input timeout\n");
 					goto cleanup;
 				case Ctrl('W'):
 				case Ctrl('X'):
@@ -1134,8 +1138,6 @@ int editor_display(EDITOR_DATA *p_editor
 					break;
 				}
 
-				BBS_last_access_tm = time(NULL);
-
 				// Refresh current action while user input
 				if (user_online_update(NULL) < 0)
 				{