From 7f3654bdfc60a15f9a93666bb3b2fe9b36c5e5eb Mon Sep 17 00:00:00 2001
From: plum-lihui <huili@taosdata.com>
Date: Wed, 7 Jul 2021 16:41:04 +0800
Subject: [PATCH] [TD-5056]<fix> fix input exception

---
 src/kit/shell/inc/shellCommand.h | 2 +-
 src/kit/shell/src/shellCommand.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/kit/shell/inc/shellCommand.h b/src/kit/shell/inc/shellCommand.h
index 3094bdb9dd..a08c1f48d1 100644
--- a/src/kit/shell/inc/shellCommand.h
+++ b/src/kit/shell/inc/shellCommand.h
@@ -45,7 +45,7 @@ extern void updateBuffer(Command *cmd);
 extern int isReadyGo(Command *cmd);
 extern void resetCommand(Command *cmd, const char s[]);
 
-int countPrefixOnes(char c);
+int countPrefixOnes(unsigned char c);
 void clearScreen(int ecmd_pos, int cursor_pos);
 void printChar(char c, int times);
 void positionCursor(int step, int direction);
diff --git a/src/kit/shell/src/shellCommand.c b/src/kit/shell/src/shellCommand.c
index 9173ab0efd..e1a3dfe102 100644
--- a/src/kit/shell/src/shellCommand.c
+++ b/src/kit/shell/src/shellCommand.c
@@ -26,7 +26,7 @@ typedef struct {
   char widthOnScreen;
 } UTFCodeInfo;
 
-int countPrefixOnes(char c) {
+int countPrefixOnes(unsigned char c) {
   unsigned char mask = 127;
   mask = ~mask;
   int ret = 0;
@@ -48,7 +48,7 @@ void getPrevCharSize(const char *str, int pos, int *size, int *width) {
   while (--pos >= 0) {
     *size += 1;
 
-    if (str[pos] > 0 || countPrefixOnes(str[pos]) > 1) break;
+    if (str[pos] > 0 || countPrefixOnes((unsigned char )str[pos]) > 1) break;
   }
 
   int rc = mbtowc(&wc, str + pos, MB_CUR_MAX);
-- 
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