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extmod/moductypes: Implement __int__ for PTR. 

Allows to get address a pointer contains, as an integer.
This commit is contained in:
Paul Sokolovsky 2018-08-29 19:37:03 +03:00 committed by Damien George
parent d690c2e148
commit 9d864bde04
1 changed files with 20 additions and 0 deletions
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20
extmod/moductypes.c
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@ -614,6 +614,25 @@ STATIC mp_obj_t uctypes_struct_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_ob
}
}
STATIC mp_obj_t uctypes_struct_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
switch (op) {
case MP_UNARY_OP_INT:
if (MP_OBJ_IS_TYPE(self->desc, &mp_type_tuple)) {
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(self->desc);
mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(t->items[0]);
uint agg_type = GET_TYPE(offset, AGG_TYPE_BITS);
if (agg_type == PTR) {
byte *p = *(void**)self->addr;
return mp_obj_new_int((mp_int_t)(uintptr_t)p);
}
}
/* fallthru */
default: return MP_OBJ_NULL; // op not supported
}
}
STATIC mp_int_t uctypes_get_buffer(mp_obj_t self_in, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
(void)flags;
mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
@ -662,6 +681,7 @@ STATIC const mp_obj_type_t uctypes_struct_type = {
.make_new = uctypes_struct_make_new,
.attr = uctypes_struct_attr,
.subscr = uctypes_struct_subscr,
.unary_op = uctypes_struct_unary_op,
.buffer_p = { .get_buffer = uctypes_get_buffer },
};