rt_vsnprintf参数size最大值RSIZE_MAX

xmaowu · xmaowu · commit 965bc4cd67f6 · 2025-05-20T11:53:29.000+08:00
diff --git a/src/klibc/kstdio.c b/src/klibc/kstdio.c
@@ -51,7 +51,7 @@ RTM_EXPORT(rt_snprintf);
  */
 int rt_vsprintf(char *buf, const char *format, va_list arg_ptr)
 {
-    return rt_vsnprintf(buf, (rt_size_t) - 1, format, arg_ptr);
+    return rt_vsnprintf(buf, ((rt_size_t) - 1) >> 1, format, arg_ptr);
 }
 RTM_EXPORT(rt_vsprintf);
 

Original file line number	Diff line number	Diff line change
`@@ -51,7 +51,7 @@ RTM_EXPORT(rt_snprintf);`
`51`	`51`	`*/`
`52`	`52`	`int rt_vsprintf(char buf, const char format, va_list arg_ptr)`
`53`	`53`	`{`
`54`		`- return rt_vsnprintf(buf, (rt_size_t) - 1, format, arg_ptr);`
	`54`	`+ return rt_vsnprintf(buf, ((rt_size_t) - 1) >> 1, format, arg_ptr);`
`55`	`55`	`}`
`56`	`56`	`RTM_EXPORT(rt_vsprintf);`
`57`	`57`