Update kstdio function signatures to match standard libc

Co-authored-by: BernardXiong <[email protected]>

Author: Copilot

include/klibc/kstdio.h

@@ -19,9 +19,9 @@ extern "C" {
 #endif
 
 int rt_vsprintf(char *dest, const char *format, va_list arg_ptr);
-int rt_vsnprintf(char *buf, rt_size_t size, const char *fmt, va_list args);
+int rt_vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
 int rt_sprintf(char *buf, const char *format, ...);
-int rt_snprintf(char *buf, rt_size_t size, const char *format, ...);
+int rt_snprintf(char *buf, size_t size, const char *format, ...);
 int rt_vsscanf(const char *buffer, const char *format, va_list ap);
 int rt_sscanf(const char *str, const char *format, ...);
 

src/klibc/kstdio.c

@@ -25,9 +25,9 @@
  *
  * @return The number of characters actually written to buffer.
  */
-int rt_snprintf(char *buf, rt_size_t size, const char *fmt, ...)
+int rt_snprintf(char *buf, size_t size, const char *fmt, ...)
 {
-    rt_int32_t n = 0;
+    int n = 0;
     va_list args;
 
     va_start(args, fmt);
@@ -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, (size_t) - 1, format, arg_ptr);
 }
 RTM_EXPORT(rt_vsprintf);
 
@@ -66,7 +66,7 @@ RTM_EXPORT(rt_vsprintf);
  */
 int rt_sprintf(char *buf, const char *format, ...)
 {
-    rt_int32_t n = 0;
+    int n = 0;
     va_list arg_ptr;
 
     va_start(arg_ptr, format);
@@ -78,7 +78,7 @@ int rt_sprintf(char *buf, const char *format, ...)
 RTM_EXPORT(rt_sprintf);
 
 #ifdef RT_KLIBC_USING_LIBC_VSNPRINTF
-int rt_vsnprintf(char *buf, rt_size_t size, const char *fmt, va_list args)
+int rt_vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 {
     return vsnprintf(buf, size, fmt, args);
 }