--- lbbs/src/str_process.c	2025/06/14 02:58:11	1.14
+++ lbbs/src/str_process.c	2025/10/18 12:06:10	1.21
@@ -14,13 +14,59 @@
  *                                                                         *
  ***************************************************************************/
 
-#include "str_process.h"
 #include "common.h"
 #include "log.h"
+#include "str_process.h"
 #include <stdio.h>
 #include <string.h>
 
-int split_line(const char *buffer, int max_display_len, int *p_eol, int *p_display_len)
+int str_length(const char *str, int skip_ctrl_seq)
+{
+	int i;
+	char c;
+	int ret = 0;
+
+	for (i = 0; str[i] != '\0'; i++)
+	{
+		c = str[i];
+
+		if (c == '\r' || c == '\7') // skip
+		{
+			continue;
+		}
+
+		if (skip_ctrl_seq && c == '\033' && str[i + 1] == '[') // Skip control sequence
+		{
+			i += 2;
+			while (str[i] != '\0' && str[i] != 'm')
+			{
+				i++;
+			}
+			continue;
+		}
+
+		// Process UTF-8 Chinese characters
+		if (c & 0x80) // head of multi-byte character
+		{
+			c = (c & 0x70) << 1;
+			while (c & 0x80)
+			{
+				i++;
+				c = (c & 0x7f) << 1;
+			}
+
+			ret += 2;
+		}
+		else
+		{
+			ret++;
+		}
+	}
+
+	return ret;
+}
+
+int split_line(const char *buffer, int max_display_len, int *p_eol, int *p_display_len, int skip_ctrl_seq)
 {
 	int i;
 	*p_eol = 0;
@@ -36,7 +82,7 @@ int split_line(const char *buffer, int m
 			continue;
 		}
 
-		if (c == '\033' && buffer[i + 1] == '[') // Skip control sequence
+		if (skip_ctrl_seq && c == '\033' && buffer[i + 1] == '[') // Skip control sequence
 		{
 			i += 2;
 			while (buffer[i] != '\0' && buffer[i] != 'm')
@@ -46,13 +92,20 @@ int split_line(const char *buffer, int m
 			continue;
 		}
 
-		if (c < 0 || c > 127) // GBK chinese character
+		if (c & 0x80) // head of multi-byte character
 		{
 			if (*p_display_len + 2 > max_display_len)
 			{
 				break;
 			}
-			i++;
+
+			c = (c & 0x70) << 1;
+			while (c & 0x80)
+			{
+				i++;
+				c = (c & 0x7f) << 1;
+			}
+
 			(*p_display_len) += 2;
 		}
 		else
@@ -76,7 +129,8 @@ int split_line(const char *buffer, int m
 	return i;
 }
 
-long split_data_lines(const char *p_buf, int max_display_len, long *p_line_offsets, long line_offsets_count)
+long split_data_lines(const char *p_buf, int max_display_len, long *p_line_offsets, long line_offsets_count,
+					  int skip_ctrl_seq, int *p_line_widths)
 {
 	int line_cnt = 0;
 	int len;
@@ -87,12 +141,17 @@ long split_data_lines(const char *p_buf,
 
 	do
 	{
-		len = split_line(p_buf, max_display_len, &end_of_line, &display_len);
+		len = split_line(p_buf, max_display_len, &end_of_line, &display_len, skip_ctrl_seq);
+
+		if (p_line_widths)
+		{
+			p_line_widths[line_cnt] = display_len;
+		}
 
 		// Exceed max_line_cnt
 		if (line_cnt + 1 >= line_offsets_count)
 		{
-			log_error("Line count %d reaches limit %d\n", line_cnt + 1, line_offsets_count);
+			// log_error("Line count %d reaches limit %d\n", line_cnt + 1, line_offsets_count);
 			return line_cnt;
 		}
 
@@ -104,22 +163,19 @@ long split_data_lines(const char *p_buf,
 	return line_cnt;
 }
 
-int ctrl_seq_filter(char *buffer)
+int str_filter(char *buffer, int skip_ctrl_seq)
 {
 	int i;
 	int j;
-	char c;
 
 	for (i = 0, j = 0; buffer[i] != '\0'; i++)
 	{
-		c = buffer[i];
-
-		if (c == '\r' || c == '\7') // skip
+		if (buffer[i] == '\r' || buffer[i] == '\7') // skip
 		{
 			continue;
 		}
 
-		if (c == '\033' && buffer[i + 1] == '[') // Skip control sequence
+		if (skip_ctrl_seq && buffer[i] == '\033' && buffer[i + 1] == '[') // Skip control sequence
 		{
 			i += 2;
 			while (buffer[i] != '\0' && buffer[i] != 'm')