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Property key filter API (#4311)

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Co-authored-by: Robert Fancsik <frobert@inf.u-szeged.hu>

JerryScript-DCO-1.0-Signed-off-by: Daniel Balla dballa@inf.u-szeged.hu
This commit is contained in:
Daniel Balla
2020-10-29 11:10:21 +01:00
committed by GitHub
parent e681adce05
commit b7ca097436
4 changed files with 462 additions and 0 deletions
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jerry-core/api/jerry.c
+180
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@@ -3661,6 +3661,186 @@ jerry_foreach_object_property (const jerry_value_t obj_val, /**< object value */
return false;
} /* jerry_foreach_object_property */
/**
* Gets the property keys for the given object using the selected filters.
*
* @return array containing the filtered property keys in successful operation
* value marked with error flag - otherwise
*/
jerry_value_t
jerry_object_get_property_names (const jerry_value_t obj_val, /**< object */
jerry_property_filter_t filter) /**< property filter options */
{
jerry_assert_api_available ();
if (!ecma_is_value_object (obj_val))
{
return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
}
ecma_object_t *obj_p = ecma_get_object_from_value (obj_val);
ecma_object_t *obj_iter_p = obj_p;
ecma_collection_t *result_p = ecma_new_collection ();
while (true)
{
/* Step 1. Get Object.[[OwnKeys]] */
ecma_collection_t *prop_names_p = ecma_op_object_own_property_keys (obj_iter_p);
#if ENABLED (JERRY_BUILTIN_PROXY)
if (prop_names_p == NULL)
{
return jerry_throw (ECMA_VALUE_ERROR);
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
for (uint32_t i = 0; i < prop_names_p->item_count; i++)
{
ecma_value_t key = prop_names_p->buffer_p[i];
ecma_string_t *key_p = ecma_get_prop_name_from_value (key);
uint32_t index = ecma_string_get_array_index (key_p);
/* Step 2. Filter by key type */
if (filter & (JERRY_PROPERTY_FILTER_EXLCUDE_STRINGS
| JERRY_PROPERTY_FILTER_EXLCUDE_SYMBOLS
| JERRY_PROPERTY_FILTER_EXLCUDE_INTEGER_INDICES))
{
if (ecma_is_value_symbol (key))
{
if (filter & JERRY_PROPERTY_FILTER_EXLCUDE_SYMBOLS)
{
continue;
}
}
else if (index != ECMA_STRING_NOT_ARRAY_INDEX)
{
if ((filter & JERRY_PROPERTY_FILTER_EXLCUDE_INTEGER_INDICES)
|| ((filter & JERRY_PROPERTY_FILTER_EXLCUDE_STRINGS)
&& !(filter & JERRY_PROPERTY_FILTER_INTEGER_INDICES_AS_NUMBER)))
{
continue;
}
}
else if (filter & JERRY_PROPERTY_FILTER_EXLCUDE_STRINGS)
{
continue;
}
}
/* Step 3. Filter property attributes */
if (filter & (JERRY_PROPERTY_FILTER_EXLCUDE_NON_CONFIGURABLE
| JERRY_PROPERTY_FILTER_EXLCUDE_NON_ENUMERABLE
| JERRY_PROPERTY_FILTER_EXLCUDE_NON_WRITABLE))
{
ecma_property_descriptor_t prop_desc;
ecma_value_t status = ecma_op_object_get_own_property_descriptor (obj_iter_p, key_p, &prop_desc);
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_IS_VALUE_ERROR (status))
{
ecma_collection_free (prop_names_p);
ecma_collection_free (result_p);
return jerry_throw (ECMA_VALUE_ERROR);
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
JERRY_ASSERT (ecma_is_value_true (status));
uint16_t flags = prop_desc.flags;
ecma_free_property_descriptor (&prop_desc);
if ((!(flags & ECMA_PROP_IS_CONFIGURABLE)
&& (filter & JERRY_PROPERTY_FILTER_EXLCUDE_NON_CONFIGURABLE))
|| (!(flags & ECMA_PROP_IS_ENUMERABLE)
&& (filter & JERRY_PROPERTY_FILTER_EXLCUDE_NON_ENUMERABLE))
|| (!(flags & ECMA_PROP_IS_WRITABLE)
&& (filter & JERRY_PROPERTY_FILTER_EXLCUDE_NON_WRITABLE)))
{
continue;
}
}
if (index != ECMA_STRING_NOT_ARRAY_INDEX
&& (filter & JERRY_PROPERTY_FILTER_INTEGER_INDICES_AS_NUMBER))
{
ecma_deref_ecma_string (key_p);
key = ecma_make_uint32_value (index);
}
else
{
ecma_ref_ecma_string (key_p);
}
if ((filter & JERRY_PROPERTY_FILTER_TRAVERSE_PROTOTYPE_CHAIN) && obj_iter_p != obj_p)
{
uint32_t duplicate_idx = 0;
while (duplicate_idx < result_p->item_count)
{
ecma_value_t value = result_p->buffer_p[duplicate_idx];
JERRY_ASSERT (ecma_is_value_prop_name (value) || ecma_is_value_number (value));
if (JERRY_UNLIKELY (ecma_is_value_number (value)))
{
if (ecma_get_number_from_value (value) == ecma_get_number_from_value (key))
{
break;
}
}
else if (ecma_compare_ecma_strings (ecma_get_prop_name_from_value (value), key_p))
{
break;
}
duplicate_idx++;
}
if (duplicate_idx == result_p->item_count)
{
ecma_collection_push_back (result_p, key);
}
}
else
{
ecma_collection_push_back (result_p, key);
}
}
ecma_collection_free (prop_names_p);
/* Step 4: Traverse prototype chain */
jmem_cpointer_t parent_cp = JMEM_CP_NULL;
if (filter & JERRY_PROPERTY_FILTER_TRAVERSE_PROTOTYPE_CHAIN)
{
#if ENABLED (JERRY_BUILTIN_PROXY)
if (ECMA_OBJECT_IS_PROXY (obj_iter_p))
{
ecma_value_t parent = ecma_proxy_object_get_prototype_of (obj_iter_p);
if (ECMA_IS_VALUE_ERROR (parent))
{
ecma_collection_free (result_p);
return jerry_throw (ECMA_VALUE_ERROR);
}
parent_cp = ecma_proxy_object_prototype_to_cp (parent);
}
else
#endif /* ENABLED (JERRY_BUILTIN_PROXY) */
{
parent_cp = ecma_op_ordinary_object_get_prototype_of (obj_iter_p);
}
}
if (parent_cp == JMEM_CP_NULL)
{
break;
}
obj_iter_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, parent_cp);
}
return ecma_op_new_array_object_from_collection (result_p, false);
} /* jerry_object_get_property_names */
/**
* Resolve or reject the promise with an argument.
*