py: Add very basic implementation of dir() builtin.
Only works on modules and class instances.
diff --git a/py/builtin.c b/py/builtin.c
index 4564d15..ff248f8 100644
--- a/py/builtin.c
+++ b/py/builtin.c
@@ -148,6 +148,36 @@
MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_chr_obj, mp_builtin_chr);
+static mp_obj_t mp_builtin_dir(uint n_args, const mp_obj_t *args) {
+ // TODO make this function more general and less of a hack
+
+ mp_map_t *map;
+ if (n_args == 0) {
+ // make a list of names in the local name space
+ map = rt_locals_get();
+ } else { // n_args == 1
+ // make a list of names in the given object
+ mp_obj_type_t *type = mp_obj_get_type(args[0]);
+ if (type == &module_type) {
+ map = mp_obj_module_get_globals(args[0]);
+ } else if (type->locals_dict != MP_OBJ_NULL && MP_OBJ_IS_TYPE(type->locals_dict, &dict_type)) {
+ map = mp_obj_dict_get_map(type->locals_dict);
+ } else {
+ return mp_obj_new_list(0, NULL);
+ }
+ }
+
+ mp_obj_t dir = mp_obj_new_list(0, NULL);
+ for (uint i = 0; i < map->alloc; i++) {
+ if (map->table[i].key != MP_OBJ_NULL) {
+ mp_obj_list_append(dir, map->table[i].key);
+ }
+ }
+ return dir;
+}
+
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_dir_obj, 0, 1, mp_builtin_dir);
+
static mp_obj_t mp_builtin_divmod(mp_obj_t o1_in, mp_obj_t o2_in) {
if (MP_OBJ_IS_SMALL_INT(o1_in) && MP_OBJ_IS_SMALL_INT(o2_in)) {
mp_small_int_t i1 = MP_OBJ_SMALL_INT_VALUE(o1_in);