--- lbbs/src/lml.c	2025/06/03 02:30:18	1.5
+++ lbbs/src/lml.c	2025/06/14 10:10:28	1.9
@@ -75,7 +75,6 @@ static int lml_tag_quote_level = 0;
 
 static int lml_tag_quote_filter(const char *tag_name, const char *tag_param_buf, char *tag_output_buf, size_t tag_output_buf_len)
 {
-
 	if (strcasecmp(tag_name, "quote") == 0)
 	{
 		if (lml_tag_quote_level <= LML_TAG_QUOTE_MAX_LEVEL)
@@ -100,18 +99,18 @@ static int lml_tag_quote_filter(const ch
 const static char *LML_tag_def[][3] = {
 	{"left", "[", ""},
 	{"right", "]", NULL},
-	{"bold", "\033[1m", ""},
+	{"bold", "\033[1m", ""}, // does not work in Fterm
 	{"/bold", "\033[22m", NULL},
 	{"b", "\033[1m", ""},
 	{"/b", "\033[22m", NULL},
-	{"italic", "\033[5m", ""}, // use blink instead
-	{"/italic", "\033[25m", NULL},
+	{"italic", "\033[5m", ""},	 // use blink instead
+	{"/italic", "\033[m", NULL}, // \033[25m does not work in Fterm
 	{"i", "\033[5m", ""},
-	{"/i", "\033[25m", NULL},
+	{"/i", "\033[m", NULL},
 	{"underline", "\033[4m", ""},
-	{"/underline", "\033[24m", NULL},
+	{"/underline", "\033[m", NULL}, // \033[24m does not work in Fterm
 	{"u", "\033[4m", ""},
-	{"/u", "\033[24m", NULL},
+	{"/u", "\033[m", NULL},
 	{"color", NULL, (const char *)lml_tag_color_filter},
 	{"/color", "\033[m", NULL},
 	{"quote", NULL, (const char *)lml_tag_quote_filter},
@@ -179,9 +178,9 @@ int lml_plain(const char *str_in, char *
 
 				tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN,
 										  (lml_tag_quote_level > 0 ? lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP] : "\033[m"));
-				if (j + tag_output_len >= buf_len - 1)
+				if (j + tag_output_len >= buf_len)
 				{
-					log_error("Buffer is not longer enough for output string %d >= %d\n", j + tag_output_len, buf_len - 1);
+					log_error("Buffer is not longer enough for output string %d >= %d\n", j + tag_output_len, buf_len);
 					str_out[j] = '\0';
 					return j;
 				}
@@ -202,9 +201,9 @@ int lml_plain(const char *str_in, char *
 
 				tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN,
 										  lml_tag_quote_color[(lml_tag_quote_level) % LML_TAG_QUOTE_LEVEL_LOOP]);
-				if (j + tag_output_len >= buf_len - 1)
+				if (j + tag_output_len >= buf_len)
 				{
-					log_error("Buffer is not longer enough for output string %d >= %d\n", j + tag_output_len, buf_len - 1);
+					log_error("Buffer is not longer enough for output string %d >= %d\n", j + tag_output_len, buf_len);
 					str_out[j] = '\0';
 					return j;
 				}
@@ -215,6 +214,30 @@ int lml_plain(const char *str_in, char *
 			new_line = 0;
 		}
 
+		if (str_in[i] == '\033' && str_in[i + 1] == '[') // Escape sequence -- copy directly
+		{
+			for (k = i + 2; str_in[k] != '\0' && str_in[k] != 'm'; k++)
+				;
+
+			if (str_in[k] == 'm') // Valid
+			{
+				if (j + (k - i + 1) >= buf_len)
+				{
+					log_error("Buffer is not longer enough for output string %d >= %d\n", j + (k - i + 1), buf_len);
+					str_out[j] = '\0';
+					return j;
+				}
+				memcpy(str_out + j, str_in + i, (size_t)(k - i + 1));
+				j += (k - i + 1);
+				i = k;
+				continue;
+			}
+			else // reach end of string
+			{
+				break;
+			}
+		}
+
 		if (str_in[i] == '\n')
 		{
 			tag_start_pos = -1; // jump out of tag at end of line
@@ -271,9 +294,9 @@ int lml_plain(const char *str_in, char *
 								tag_output_len = ((lml_tag_filter_cb)LML_tag_def[k][2])(
 									LML_tag_def[k][0], tag_param_buf, tag_output_buf, LML_TAG_OUTPUT_BUF_LEN);
 							}
-							if (j + tag_output_len >= buf_len - 1)
+							if (j + tag_output_len >= buf_len)
 							{
-								log_error("Buffer is not longer enough for output string %d >= %d\n", j + tag_output_len, buf_len - 1);
+								log_error("Buffer is not longer enough for output string %d >= %d\n", j + tag_output_len, buf_len);
 								str_out[j] = '\0';
 								return j;
 							}
@@ -294,9 +317,9 @@ int lml_plain(const char *str_in, char *
 		{
 			if (str_in[i] < 0 || str_in[i] > 127) // GBK chinese character
 			{
-				if (j + 2 >= buf_len - 1)
+				if (j + 2 >= buf_len)
 				{
-					log_error("Buffer is not longer enough for output string %ld >= %d\n", j + 2, buf_len - 1);
+					log_error("Buffer is not longer enough for output string %ld >= %d\n", j + 2, buf_len);
 					str_out[j] = '\0';
 					return j;
 				}
@@ -308,9 +331,9 @@ int lml_plain(const char *str_in, char *
 				}
 			}
 
-			if (j + 1 >= buf_len - 1)
+			if (j + 1 >= buf_len)
 			{
-				log_error("Buffer is not longer enough for output string %ld >= %d\n", j + 1, buf_len - 1);
+				log_error("Buffer is not longer enough for output string %ld >= %d\n", j + 1, buf_len);
 				str_out[j] = '\0';
 				return j;
 			}
@@ -325,9 +348,9 @@ int lml_plain(const char *str_in, char *
 	if (lml_tag_quote_level > 0)
 	{
 		tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, "\033[m");
-		if (j + tag_output_len >= buf_len - 1)
+		if (j + tag_output_len >= buf_len)
 		{
-			log_error("Buffer is not longer enough for output string %d >= %d\n", j + tag_output_len, buf_len - 1);
+			log_error("Buffer is not longer enough for output string %d >= %d\n", j + tag_output_len, buf_len);
 			str_out[j] = '\0';
 			return j;
 		}