From 81a679d73ff5e3b06b52ff56c38c573d82fa0792 Mon Sep 17 00:00:00 2001
From: yaoyuan <yuanyao14@huawei.com>
Date: Fri, 29 Apr 2022 10:15:53 +0800
Subject: [PATCH] Write size-1 to ensure buffer has space for '\0'

Signed-off-by: yaoyuan <yuanyao14@huawei.com>
Change-Id: Iae3b29c7a866dbc56a13c7890c97d5728b47643d
---
 native_engine/impl/ark/native_value/ark_native_string.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/native_engine/impl/ark/native_value/ark_native_string.cpp b/native_engine/impl/ark/native_value/ark_native_string.cpp
index b16ae52..ded5fd5 100644
--- a/native_engine/impl/ark/native_value/ark_native_string.cpp
+++ b/native_engine/impl/ark/native_value/ark_native_string.cpp
@@ -47,7 +47,7 @@ void ArkNativeString::GetCString(char* buffer, size_t size, size_t* length)
     if (buffer == nullptr) {
         *length = val->Utf8Length() - 1;
     } else if (size != 0) {
-        int copied = val->WriteUtf8(buffer, size) - 1;
+        int copied = val->WriteUtf8(buffer, size - 1) - 1;
         buffer[copied] = '\0';
         *length = copied;
     } else {