diff options
Diffstat (limited to 'py')
| -rw-r--r-- | py/dynruntime.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/py/dynruntime.h b/py/dynruntime.h index 7092a5dd8..bbe093aa0 100644 --- a/py/dynruntime.h +++ b/py/dynruntime.h @@ -31,6 +31,7 @@ #include "py/nativeglue.h" #include "py/objstr.h" +#include "py/objtype.h" #undef MP_ROM_QSTR #undef MP_OBJ_QSTR_VALUE @@ -106,6 +107,7 @@ static inline void *m_realloc_dyn(void *ptr, size_t new_num_bytes) { #define mp_obj_new_list(n, items) (mp_fun_table.new_list((n), (items))) #define mp_obj_get_type(o) (mp_fun_table.obj_get_type((o))) +#define mp_obj_cast_to_native_base(o, t) (mp_obj_cast_to_native_base_dyn((o), (t))) #define mp_obj_get_int(o) (mp_fun_table.native_from_obj(o, MP_NATIVE_TYPE_INT)) #define mp_obj_get_int_truncated(o) (mp_fun_table.native_from_obj(o, MP_NATIVE_TYPE_UINT)) #define mp_obj_str_get_str(s) ((void*)mp_fun_table.native_from_obj(s, MP_NATIVE_TYPE_PTR)) @@ -125,6 +127,21 @@ static inline mp_obj_t mp_obj_new_str_of_type_dyn(const mp_obj_type_t *type, con } } +static inline mp_obj_t mp_obj_cast_to_native_base_dyn(mp_obj_t self_in, mp_const_obj_t native_type) { + const mp_obj_type_t *self_type = mp_obj_get_type(self_in); + + if (MP_OBJ_FROM_PTR(self_type) == native_type) { + return self_in; + } else if (self_type->parent != native_type) { + // The self_in object is not a direct descendant of native_type, so fail the cast. + // This is a very simple version of mp_obj_is_subclass_fast that could be improved. + return MP_OBJ_NULL; + } else { + mp_obj_instance_t *self = (mp_obj_instance_t*)MP_OBJ_TO_PTR(self_in); + return self->subobj[0]; + } +} + static inline void *mp_obj_str_get_data_dyn(mp_obj_t o, size_t *l) { mp_buffer_info_t bufinfo; mp_get_buffer_raise(o, &bufinfo, MP_BUFFER_READ); |