embed/extmod: add trezor_obj_get_uint8

6 years ago · 648ec675f4
parent 39c1c85abb
commit 648ec675f4
1 changed files with 8 additions and 0 deletions
--- a/embed/extmod/trezorobj.h
+++ b/embed/extmod/trezorobj.h
@ -69,4 +69,12 @@ static inline mp_uint_t trezor_obj_get_uint(mp_obj_t obj) {
    }
 }

+static inline uint8_t trezor_obj_get_uint8(mp_obj_t obj) {
+    mp_uint_t u = trezor_obj_get_uint(obj);
+    if (u > 0xFF) {
+        mp_raise_msg(&mp_type_OverflowError, "value does not fit into byte type");
+    }
+    return u;
+}
+
 #endif