add platform_set_snprintf
diff --git a/library/platform.c b/library/platform.c
index 3eb4b1a..8a26f7b 100644
--- a/library/platform.c
+++ b/library/platform.c
@@ -62,6 +62,36 @@
}
#endif /* POLARSSL_PLATFORM_MEMORY */
+#if defined(POLARSSL_PLATFORM_SNPRINTF_ALT)
+#if !defined(POLARSSL_PLATFORM_STD_SNPRINTF)
+/*
+ * Make dummy function to prevent NULL pointer dereferences
+ */
+static int platform_snprintf_uninit( char * s, size_t n,
+ const char * format, ... )
+{
+ ((void) s);
+ ((void) n);
+ ((void) format)
+ return( 0 );
+}
+
+#define POLARSSL_PLATFORM_STD_SNPRINTF platform_snprintf_uninit
+#endif /* !POLARSSL_PLATFORM_STD_SNPRINTF */
+
+int (*polarssl_snprintf)( char * s, size_t n,
+ const char * format,
+ ... ) = POLARSSL_PLATFORM_STD_SNPRINTF;
+
+int platform_set_snprintf( int (*snprintf_func)( char * s, size_t n,
+ const char * format,
+ ... ) )
+{
+ polarssl_snprintf = snprintf_func;
+ return( 0 );
+}
+#endif /* POLARSSL_PLATFORM_SNPRINTF_ALT */
+
#if defined(POLARSSL_PLATFORM_PRINTF_ALT)
#if !defined(POLARSSL_PLATFORM_STD_PRINTF)
/*
