--- lbbs/src/str_process.c	2025/05/17 05:54:42	1.9
+++ lbbs/src/str_process.c	2025/06/02 15:01:55	1.11
@@ -25,10 +25,11 @@ int split_line(const char *buffer, int m
 	int i;
 	*p_eol = 0;
 	*p_display_len = 0;
+	char c;
 
 	for (i = 0; buffer[i] != '\0'; i++)
 	{
-		char c = buffer[i];
+		c = buffer[i];
 
 		if (c == '\r' || c == '\7') // skip
 		{
@@ -52,14 +53,14 @@ int split_line(const char *buffer, int m
 			continue;
 		}
 
-		if (c > 127 && c <= 255) // GBK chinese character
+		if (c < 0 || c > 127) // GBK chinese character
 		{
 			if (*p_display_len + 2 > max_display_len)
 			{
 				break;
 			}
 			i++;
-			*p_display_len += 2;
+			(*p_display_len) += 2;
 		}
 		else
 		{