From 7eede3b4688e37f48c0cb29598111f47bc8a8a4d Mon Sep 17 00:00:00 2001
From: acevest <zhaoyanbai@126.com>
Date: Sat, 15 Aug 2026 08:42:14 +0800
Subject: [PATCH] =?utf8?q?=E4=BF=AE=E5=A4=8D=E8=BE=93=E5=87=BA=E6=A0=BC?=
 =?utf8?q?=E5=BC=8F=E8=BD=AC=E6=8D=A2=E7=9A=84=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

---
 lib/string.c   |  5 +++--
 lib/vsprintf.c | 10 ++++++----
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/lib/string.c b/lib/string.c
index c7ca91c..d1cc161 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -88,11 +88,12 @@ char* strcat(char* dest, const char* src) {
     //     ;
     while (1) {
         *dest = *src;
-        dest++;
-        src++;
         if (*dest == 0) {
             break;
         }
+
+        dest++;
+        src++;
     }
     return tmp;
 }
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 1129c0a..2150486 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -169,17 +169,19 @@ char* i64tou(char* s, uint64_t n) {
 
 char* itou(char* s, unsigned int n) {
     char* p = s;
+    char* h = s;
 
     do {
         *p++ = (n % 10) + '0';
         n /= 10;
     } while (n);
 
-    *p-- = 0;
+    *p = 0;
+    p--;
 
-    while (s < p) {
-        swap_char(s, p);
-        s++;
+    while (h < p) {
+        swap_char(h, p);
+        h++;
         p--;
     }
     return s;
-- 
2.47.0