src/njs_number.c \
src/njs_string.c \
src/njs_object.c \
- src/njs_object_property.c \
+ src/njs_object_prop.c \
src/njs_array.c \
src/njs_json.c \
src/njs_function.c \
#define _NJS_OBJECT_H_INCLUDED_
-typedef enum {
- NJS_PROPERTY = 0,
- NJS_PROPERTY_REF,
- NJS_METHOD,
- NJS_PROPERTY_HANDLER,
- NJS_WHITEOUT,
-} njs_object_prop_type_t;
-
-
-/*
- * Attributes are generally used as Boolean values.
- * The UNSET value is can be seen:
- * for newly created property descriptors in njs_define_property(),
- * for writable attribute of accessor descriptors (desc->writable
- * cannot be used as a boolean value).
- */
-typedef enum {
- NJS_ATTRIBUTE_FALSE = 0,
- NJS_ATTRIBUTE_TRUE = 1,
- NJS_ATTRIBUTE_UNSET,
-} njs_object_attribute_t;
-
-
-typedef struct {
- /* Must be aligned to njs_value_t. */
- njs_value_t value;
- njs_value_t name;
- njs_value_t getter;
- njs_value_t setter;
-
- /* TODO: get rid of types */
- njs_object_prop_type_t type:8; /* 3 bits */
-
- njs_object_attribute_t writable:8; /* 2 bits */
- njs_object_attribute_t enumerable:8; /* 2 bits */
- njs_object_attribute_t configurable:8; /* 2 bits */
-} njs_object_prop_t;
-
-
#define njs_is_data_descriptor(prop) \
((prop)->writable != NJS_ATTRIBUTE_UNSET || njs_is_valid(&(prop)->value))
(!njs_is_data_descriptor(prop) && !njs_is_accessor_descriptor(prop))
-typedef struct {
- njs_lvlhsh_query_t lhq;
-
- /* scratch is used to get the value of an NJS_PROPERTY_HANDLER property. */
- njs_object_prop_t scratch;
-
- /* These three fields are used for NJS_EXTERNAL setters. */
- uintptr_t ext_data;
- const njs_extern_t *ext_proto;
- uint32_t ext_index;
-
- njs_value_t value;
- njs_object_t *prototype;
- njs_object_prop_t *own_whiteout;
- uint8_t query;
- uint8_t shared;
- uint8_t own;
-} njs_property_query_t;
-
-
-#define njs_property_query_init(pq, _query, _own) \
- do { \
- (pq)->lhq.key.length = 0; \
- (pq)->lhq.value = NULL; \
- (pq)->own_whiteout = NULL; \
- (pq)->query = _query; \
- (pq)->shared = 0; \
- (pq)->own = _own; \
- } while (0)
-
-
struct njs_object_init_s {
njs_str_t name;
const njs_object_prop_t *properties;
njs_int_t njs_object_prototype_to_string(njs_vm_t *vm, njs_value_t *args,
njs_uint_t nargs, njs_index_t unused);
-njs_int_t njs_property_query(njs_vm_t *vm, njs_property_query_t *pq,
- njs_value_t *object, njs_value_t *property);
-njs_int_t njs_value_property(njs_vm_t *vm, njs_value_t *value,
- njs_value_t *property, njs_value_t *retval);
-njs_int_t njs_value_property_set(njs_vm_t *vm, njs_value_t *object,
- njs_value_t *property, njs_value_t *value);
njs_object_prop_t *njs_object_prop_alloc(njs_vm_t *vm, const njs_value_t *name,
const njs_value_t *value, uint8_t attributes);
njs_object_prop_t *njs_object_property(njs_vm_t *vm, const njs_object_t *obj,
* Copyright (C) NGINX, Inc.
*/
-#include <njs_main.h>
-#include <string.h>
-
-
-static njs_int_t njs_object_property_query(njs_vm_t *vm,
- njs_property_query_t *pq, njs_object_t *object,
- const njs_value_t *property);
-static njs_int_t njs_array_property_query(njs_vm_t *vm,
- njs_property_query_t *pq, njs_array_t *array, uint32_t index);
-static njs_int_t njs_string_property_query(njs_vm_t *vm,
- njs_property_query_t *pq, njs_value_t *object, uint32_t index);
-static njs_int_t njs_external_property_query(njs_vm_t *vm,
- njs_property_query_t *pq, njs_value_t *object);
-static njs_int_t njs_external_property_set(njs_vm_t *vm, njs_value_t *value,
- njs_value_t *setval, njs_value_t *retval);
-static njs_int_t njs_external_property_delete(njs_vm_t *vm, njs_value_t *value,
- njs_value_t *setval, njs_value_t *retval);
-static njs_object_prop_t *njs_descriptor_prop(njs_vm_t *vm,
- const njs_value_t *name, const njs_object_t *descriptor);
-
-
-/*
- * ES5.1, 8.12.1: [[GetOwnProperty]], [[GetProperty]].
- * The njs_property_query() returns values
- * NJS_OK property has been found in object,
- * retval of type njs_object_prop_t * is in pq->lhq.value.
- * in NJS_PROPERTY_QUERY_GET
- * prop->type is NJS_PROPERTY, NJS_METHOD or NJS_PROPERTY_HANDLER.
- * in NJS_PROPERTY_QUERY_SET, NJS_PROPERTY_QUERY_DELETE
- * prop->type is NJS_PROPERTY, NJS_PROPERTY_REF, NJS_METHOD or
- * NJS_PROPERTY_HANDLER.
- * NJS_DECLINED property was not found in object,
- * if pq->lhq.value != NULL it contains retval of type
- * njs_object_prop_t * where prop->type is NJS_WHITEOUT
- * NJS_ERROR exception has been thrown.
- *
- * TODO:
- * Object.defineProperty([1,2], '1', {configurable:false})
- */
-
-njs_int_t
-njs_property_query(njs_vm_t *vm, njs_property_query_t *pq, njs_value_t *object,
- njs_value_t *property)
-{
- uint32_t index;
- njs_int_t ret;
- njs_object_t *obj;
- njs_value_t prop;
- njs_function_t *function;
-
- if (njs_slow_path(!njs_is_primitive(property))) {
- ret = njs_value_to_string(vm, &prop, property);
- if (ret != NJS_OK) {
- return ret;
- }
-
- property = ∝
- }
-
- switch (object->type) {
-
- case NJS_BOOLEAN:
- case NJS_NUMBER:
- index = njs_primitive_prototype_index(object->type);
- obj = &vm->prototypes[index].object;
- break;
-
- case NJS_STRING:
- if (njs_fast_path(!njs_is_null_or_undefined_or_boolean(property))) {
- index = njs_value_to_index(property);
-
- if (njs_fast_path(index < NJS_STRING_MAX_LENGTH)) {
- return njs_string_property_query(vm, pq, object, index);
- }
- }
-
- obj = &vm->string_object;
- break;
-
- case NJS_OBJECT:
- case NJS_ARRAY:
- case NJS_OBJECT_BOOLEAN:
- case NJS_OBJECT_NUMBER:
- case NJS_OBJECT_STRING:
- case NJS_REGEXP:
- case NJS_DATE:
- case NJS_OBJECT_ERROR:
- case NJS_OBJECT_EVAL_ERROR:
- case NJS_OBJECT_INTERNAL_ERROR:
- case NJS_OBJECT_RANGE_ERROR:
- case NJS_OBJECT_REF_ERROR:
- case NJS_OBJECT_SYNTAX_ERROR:
- case NJS_OBJECT_TYPE_ERROR:
- case NJS_OBJECT_URI_ERROR:
- case NJS_OBJECT_VALUE:
- obj = njs_object(object);
- break;
-
- case NJS_FUNCTION:
- function = njs_function_value_copy(vm, object);
- if (njs_slow_path(function == NULL)) {
- return NJS_ERROR;
- }
-
- obj = &function->object;
- break;
-
- case NJS_EXTERNAL:
- obj = NULL;
- break;
-
- case NJS_UNDEFINED:
- case NJS_NULL:
- default:
- ret = njs_primitive_value_to_string(vm, &pq->value, property);
-
- if (njs_fast_path(ret == NJS_OK)) {
- njs_string_get(&pq->value, &pq->lhq.key);
- njs_type_error(vm, "cannot get property \"%V\" of undefined",
- &pq->lhq.key);
- return NJS_ERROR;
- }
-
- njs_type_error(vm, "cannot get property \"unknown\" of undefined");
-
- return NJS_ERROR;
- }
-
- ret = njs_primitive_value_to_string(vm, &pq->value, property);
-
- if (njs_fast_path(ret == NJS_OK)) {
-
- njs_string_get(&pq->value, &pq->lhq.key);
- pq->lhq.key_hash = njs_djb_hash(pq->lhq.key.start, pq->lhq.key.length);
-
- if (obj == NULL) {
- pq->own = 1;
- return njs_external_property_query(vm, pq, object);
- }
-
- return njs_object_property_query(vm, pq, obj, property);
- }
-
- return ret;
-}
-
-
-static njs_int_t
-njs_object_property_query(njs_vm_t *vm, njs_property_query_t *pq,
- njs_object_t *object, const njs_value_t *property)
-{
- uint32_t index;
- njs_int_t ret;
- njs_bool_t own;
- njs_array_t *array;
- njs_object_t *proto;
- njs_object_prop_t *prop;
- njs_object_value_t *ov;
-
- pq->lhq.proto = &njs_object_hash_proto;
-
- own = pq->own;
- pq->own = 1;
-
- proto = object;
-
- do {
- pq->prototype = proto;
-
- if (!njs_is_null_or_undefined_or_boolean(property)) {
- switch (proto->type) {
- case NJS_ARRAY:
- index = njs_value_to_index(property);
- if (njs_fast_path(index < NJS_ARRAY_MAX_INDEX)) {
- array = (njs_array_t *) proto;
- return njs_array_property_query(vm, pq, array, index);
- }
-
- break;
-
- case NJS_OBJECT_STRING:
- index = njs_value_to_index(property);
- if (njs_fast_path(index < NJS_STRING_MAX_LENGTH)) {
- ov = (njs_object_value_t *) proto;
- ret = njs_string_property_query(vm, pq, &ov->value, index);
-
- if (njs_fast_path(ret != NJS_DECLINED)) {
- return ret;
- }
- }
-
- default:
- break;
- }
- }
-
- ret = njs_lvlhsh_find(&proto->hash, &pq->lhq);
-
- if (ret == NJS_OK) {
- prop = pq->lhq.value;
-
- if (prop->type != NJS_WHITEOUT) {
- return ret;
- }
-
- if (pq->own) {
- pq->own_whiteout = prop;
- }
-
- } else {
- ret = njs_lvlhsh_find(&proto->shared_hash, &pq->lhq);
-
- if (ret == NJS_OK) {
- pq->shared = 1;
-
- return ret;
- }
- }
-
- if (own) {
- return NJS_DECLINED;
- }
-
- pq->own = 0;
- proto = proto->__proto__;
-
- } while (proto != NULL);
-
- return NJS_DECLINED;
-}
-
-
-static njs_int_t
-njs_array_property_query(njs_vm_t *vm, njs_property_query_t *pq,
- njs_array_t *array, uint32_t index)
-{
- uint32_t size;
- njs_int_t ret;
- njs_value_t *value;
- njs_object_prop_t *prop;
-
- if (index >= array->length) {
- if (pq->query != NJS_PROPERTY_QUERY_SET) {
- return NJS_DECLINED;
- }
-
- size = index - array->length;
-
- ret = njs_array_expand(vm, array, 0, size + 1);
- if (njs_slow_path(ret != NJS_OK)) {
- return ret;
- }
-
- value = &array->start[array->length];
-
- while (size != 0) {
- njs_set_invalid(value);
- value++;
- size--;
- }
-
- array->length = index + 1;
- }
-
- prop = &pq->scratch;
-
- if (pq->query == NJS_PROPERTY_QUERY_GET) {
- if (!njs_is_valid(&array->start[index])) {
- return NJS_DECLINED;
- }
-
- prop->value = array->start[index];
- prop->type = NJS_PROPERTY;
-
- } else {
- prop->value.data.u.value = &array->start[index];
- prop->type = NJS_PROPERTY_REF;
- }
-
- prop->writable = 1;
- prop->enumerable = 1;
- prop->configurable = 1;
-
- pq->lhq.value = prop;
-
- return NJS_OK;
-}
-
-
-static njs_int_t
-njs_string_property_query(njs_vm_t *vm, njs_property_query_t *pq,
- njs_value_t *object, uint32_t index)
-{
- njs_slice_prop_t slice;
- njs_object_prop_t *prop;
- njs_string_prop_t string;
-
- prop = &pq->scratch;
-
- slice.start = index;
- slice.length = 1;
- slice.string_length = njs_string_prop(&string, object);
-
- if (slice.start < slice.string_length) {
- /*
- * A single codepoint string fits in retval
- * so the function cannot fail.
- */
- (void) njs_string_slice(vm, &prop->value, &string, &slice);
-
- prop->type = NJS_PROPERTY;
- prop->writable = 0;
- prop->enumerable = 1;
- prop->configurable = 0;
-
- pq->lhq.value = prop;
-
- if (pq->query != NJS_PROPERTY_QUERY_GET) {
- /* pq->lhq.key is used by NJS_VMCODE_PROPERTY_SET for TypeError */
- njs_uint32_to_string(&pq->value, index);
- njs_string_get(&pq->value, &pq->lhq.key);
- }
-
- return NJS_OK;
- }
-
- return NJS_DECLINED;
-}
-
-
-static njs_int_t
-njs_external_property_query(njs_vm_t *vm, njs_property_query_t *pq,
- njs_value_t *object)
-{
- void *obj;
- njs_int_t ret;
- uintptr_t data;
- njs_object_prop_t *prop;
- const njs_extern_t *ext_proto;
-
- prop = &pq->scratch;
-
- prop->type = NJS_PROPERTY;
- prop->writable = 0;
- prop->enumerable = 1;
- prop->configurable = 0;
-
- ext_proto = object->external.proto;
-
- pq->lhq.proto = &njs_extern_hash_proto;
- ret = njs_lvlhsh_find(&ext_proto->hash, &pq->lhq);
-
- if (ret == NJS_OK) {
- ext_proto = pq->lhq.value;
-
- prop->value.type = NJS_EXTERNAL;
- prop->value.data.truth = 1;
- prop->value.external.proto = ext_proto;
- prop->value.external.index = object->external.index;
-
- if ((ext_proto->type & NJS_EXTERN_OBJECT) != 0) {
- goto done;
- }
-
- data = ext_proto->data;
-
- } else {
- data = (uintptr_t) &pq->lhq.key;
- }
-
- switch (pq->query) {
-
- case NJS_PROPERTY_QUERY_GET:
- if (ext_proto->get != NULL) {
- obj = njs_extern_object(vm, object);
- ret = ext_proto->get(vm, &prop->value, obj, data);
- if (njs_slow_path(ret != NJS_OK)) {
- return ret;
- }
- }
-
- break;
-
- case NJS_PROPERTY_QUERY_SET:
- case NJS_PROPERTY_QUERY_DELETE:
-
- prop->type = NJS_PROPERTY_HANDLER;
- prop->name = *object;
-
- if (pq->query == NJS_PROPERTY_QUERY_SET) {
- prop->writable = (ext_proto->set != NULL);
- prop->value.data.u.prop_handler = njs_external_property_set;
-
- } else {
- prop->configurable = (ext_proto->find != NULL);
- prop->value.data.u.prop_handler = njs_external_property_delete;
- }
-
- pq->ext_data = data;
- pq->ext_proto = ext_proto;
- pq->ext_index = object->external.index;
-
- pq->lhq.value = prop;
-
- vm->stash = (uintptr_t) pq;
-
- return NJS_OK;
- }
-
-done:
-
- if (ext_proto->type == NJS_EXTERN_METHOD) {
- njs_set_function(&prop->value, ext_proto->function);
- }
-
- pq->lhq.value = prop;
-
- return ret;
-}
-
-
-static njs_int_t
-njs_external_property_set(njs_vm_t *vm, njs_value_t *value, njs_value_t *setval,
- njs_value_t *retval)
-{
- void *obj;
- njs_int_t ret;
- njs_str_t s;
- njs_property_query_t *pq;
-
- pq = (njs_property_query_t *) vm->stash;
-
- if (!njs_is_null_or_undefined(setval)) {
- ret = njs_vm_value_to_string(vm, &s, setval);
- if (njs_slow_path(ret != NJS_OK)) {
- return ret;
- }
-
- } else {
- s = njs_str_value("");
- }
-
- *retval = *setval;
-
- obj = njs_extern_index(vm, pq->ext_index);
-
- return pq->ext_proto->set(vm, obj, pq->ext_data, &s);
-}
-
-
-static njs_int_t
-njs_external_property_delete(njs_vm_t *vm, njs_value_t *value,
- njs_value_t *unused, njs_value_t *unused2)
-{
- void *obj;
- njs_property_query_t *pq;
-
- pq = (njs_property_query_t *) vm->stash;
-
- obj = njs_extern_index(vm, pq->ext_index);
-
- return pq->ext_proto->find(vm, obj, pq->ext_data, 1);
-}
-
-
-/*
- * ES5.1, 8.12.3: [[Get]].
- * NJS_OK property has been found in object,
- * retval will contain the property's value
- *
- * NJS_DECLINED property was not found in object
- * NJS_ERROR exception has been thrown.
- * retval will contain undefined
- */
-njs_int_t
-njs_value_property(njs_vm_t *vm, njs_value_t *value, njs_value_t *property,
- njs_value_t *retval)
-{
- njs_int_t ret;
- njs_object_prop_t *prop;
- njs_property_query_t pq;
-
- njs_property_query_init(&pq, NJS_PROPERTY_QUERY_GET, 0);
-
- ret = njs_property_query(vm, &pq, value, property);
-
- switch (ret) {
-
- case NJS_OK:
- prop = pq.lhq.value;
-
- switch (prop->type) {
-
- case NJS_METHOD:
- if (pq.shared) {
- ret = njs_prop_private_copy(vm, &pq);
-
- if (njs_slow_path(ret != NJS_OK)) {
- return ret;
- }
-
- prop = pq.lhq.value;
- }
-
- /* Fall through. */
-
- case NJS_PROPERTY:
- if (njs_is_data_descriptor(prop)) {
- *retval = prop->value;
- break;
- }
-
- if (njs_is_undefined(&prop->getter)) {
- *retval = njs_value_undefined;
- break;
- }
-
- return njs_function_apply(vm, njs_function(&prop->getter), value,
- 1, retval);
-
- case NJS_PROPERTY_HANDLER:
- pq.scratch = *prop;
- prop = &pq.scratch;
- ret = prop->value.data.u.prop_handler(vm, value, NULL,
- &prop->value);
-
- if (njs_slow_path(ret != NJS_OK)) {
- return ret;
- }
-
- *retval = prop->value;
- break;
-
- default:
- njs_internal_error(vm, "unexpected property type \"%s\" "
- "while getting",
- njs_prop_type_string(prop->type));
-
- return NJS_ERROR;
- }
-
- break;
-
- case NJS_DECLINED:
- *retval = njs_value_undefined;
-
- return NJS_DECLINED;
-
- case NJS_ERROR:
- default:
-
- return ret;
- }
-
- return NJS_OK;
-}
-
-
-/*
- * NJS_OK property has been set successfully
- * NJS_ERROR exception has been thrown.
- */
-njs_int_t
-njs_value_property_set(njs_vm_t *vm, njs_value_t *object,
- njs_value_t *property, njs_value_t *value)
-{
- njs_int_t ret;
- njs_object_prop_t *prop, *shared;
- njs_property_query_t pq;
-
- if (njs_is_primitive(object)) {
- njs_type_error(vm, "property set on primitive %s type",
- njs_type_string(object->type));
- return NJS_ERROR;
- }
-
- shared = NULL;
-
- njs_property_query_init(&pq, NJS_PROPERTY_QUERY_SET, 0);
-
- ret = njs_property_query(vm, &pq, object, property);
-
- switch (ret) {
-
- case NJS_OK:
- prop = pq.lhq.value;
-
- if (njs_is_data_descriptor(prop)) {
- if (!prop->writable) {
- njs_type_error(vm,
- "Cannot assign to read-only property \"%V\" of %s",
- &pq.lhq.key, njs_type_string(object->type));
- return NJS_ERROR;
- }
-
- } else {
- if (njs_is_function(&prop->setter)) {
- return njs_function_call(vm, njs_function(&prop->setter),
- object, value, 1, &vm->retval);
- }
-
- njs_type_error(vm,
- "Cannot set property \"%V\" of %s which has only a getter",
- &pq.lhq.key, njs_type_string(object->type));
- return NJS_ERROR;
- }
-
- if (prop->type == NJS_PROPERTY_HANDLER) {
- ret = prop->value.data.u.prop_handler(vm, object, value,
- &vm->retval);
- if (ret != NJS_DECLINED) {
- return ret;
- }
- }
-
- if (pq.own) {
- switch (prop->type) {
- case NJS_PROPERTY:
- case NJS_METHOD:
- if (njs_slow_path(pq.shared)) {
- shared = prop;
- break;
- }
-
- goto found;
- case NJS_PROPERTY_REF:
- *prop->value.data.u.value = *value;
- return NJS_OK;
-
- default:
- njs_internal_error(vm, "unexpected property type \"%s\" "
- "while setting",
- njs_prop_type_string(prop->type));
-
- return NJS_ERROR;
- }
-
- break;
- }
-
- /* Fall through. */
-
- case NJS_DECLINED:
- if (njs_slow_path(pq.own_whiteout != NULL)) {
- /* Previously deleted property. */
- prop = pq.own_whiteout;
-
- prop->type = NJS_PROPERTY;
- prop->enumerable = 1;
- prop->configurable = 1;
- prop->writable = 1;
-
- goto found;
- }
-
- break;
-
- case NJS_ERROR:
- default:
-
- return ret;
- }
-
- if (njs_slow_path(!njs_object(object)->extensible)) {
- njs_type_error(vm, "Cannot add property \"%V\", "
- "object is not extensible", &pq.lhq.key);
- return NJS_ERROR;
- }
-
- prop = njs_object_prop_alloc(vm, &pq.value, &njs_value_undefined, 1);
- if (njs_slow_path(prop == NULL)) {
- return NJS_ERROR;
- }
-
- if (njs_slow_path(shared != NULL)) {
- prop->enumerable = shared->enumerable;
- prop->configurable = shared->configurable;
- }
-
- pq.lhq.replace = 0;
- pq.lhq.value = prop;
- pq.lhq.pool = vm->mem_pool;
-
- ret = njs_lvlhsh_insert(njs_object_hash(object), &pq.lhq);
- if (njs_slow_path(ret != NJS_OK)) {
- njs_internal_error(vm, "lvlhsh insert failed");
- return NJS_ERROR;
- }
-
-found:
+#include <njs_main.h>
- prop->value = *value;
- return NJS_OK;
-}
+static njs_object_prop_t *njs_descriptor_prop(njs_vm_t *vm,
+ const njs_value_t *name, const njs_object_t *descriptor);
njs_object_prop_t *
#include <njs_main.h>
+static njs_int_t njs_object_property_query(njs_vm_t *vm,
+ njs_property_query_t *pq, njs_object_t *object,
+ const njs_value_t *property);
+static njs_int_t njs_array_property_query(njs_vm_t *vm,
+ njs_property_query_t *pq, njs_array_t *array, uint32_t index);
+static njs_int_t njs_string_property_query(njs_vm_t *vm,
+ njs_property_query_t *pq, njs_value_t *object, uint32_t index);
+static njs_int_t njs_external_property_query(njs_vm_t *vm,
+ njs_property_query_t *pq, njs_value_t *object);
+static njs_int_t njs_external_property_set(njs_vm_t *vm, njs_value_t *value,
+ njs_value_t *setval, njs_value_t *retval);
+static njs_int_t njs_external_property_delete(njs_vm_t *vm, njs_value_t *value,
+ njs_value_t *setval, njs_value_t *retval);
+
+
const njs_value_t njs_value_null = njs_value(NJS_NULL, 0, 0.0);
const njs_value_t njs_value_undefined = njs_value(NJS_UNDEFINED, 0, NAN);
const njs_value_t njs_value_false = njs_value(NJS_BOOLEAN, 0, 0.0);
}
+/*
+ * ES5.1, 8.12.1: [[GetOwnProperty]], [[GetProperty]].
+ * The njs_property_query() returns values
+ * NJS_OK property has been found in object,
+ * retval of type njs_object_prop_t * is in pq->lhq.value.
+ * in NJS_PROPERTY_QUERY_GET
+ * prop->type is NJS_PROPERTY, NJS_METHOD or NJS_PROPERTY_HANDLER.
+ * in NJS_PROPERTY_QUERY_SET, NJS_PROPERTY_QUERY_DELETE
+ * prop->type is NJS_PROPERTY, NJS_PROPERTY_REF, NJS_METHOD or
+ * NJS_PROPERTY_HANDLER.
+ * NJS_DECLINED property was not found in object,
+ * if pq->lhq.value != NULL it contains retval of type
+ * njs_object_prop_t * where prop->type is NJS_WHITEOUT
+ * NJS_ERROR exception has been thrown.
+ *
+ * TODO:
+ * Object.defineProperty([1,2], '1', {configurable:false})
+ */
+
+njs_int_t
+njs_property_query(njs_vm_t *vm, njs_property_query_t *pq, njs_value_t *object,
+ njs_value_t *property)
+{
+ uint32_t index;
+ njs_int_t ret;
+ njs_object_t *obj;
+ njs_value_t prop;
+ njs_function_t *function;
+
+ if (njs_slow_path(!njs_is_primitive(property))) {
+ ret = njs_value_to_string(vm, &prop, property);
+ if (ret != NJS_OK) {
+ return ret;
+ }
+
+ property = ∝
+ }
+
+ switch (object->type) {
+
+ case NJS_BOOLEAN:
+ case NJS_NUMBER:
+ index = njs_primitive_prototype_index(object->type);
+ obj = &vm->prototypes[index].object;
+ break;
+
+ case NJS_STRING:
+ if (njs_fast_path(!njs_is_null_or_undefined_or_boolean(property))) {
+ index = njs_value_to_index(property);
+
+ if (njs_fast_path(index < NJS_STRING_MAX_LENGTH)) {
+ return njs_string_property_query(vm, pq, object, index);
+ }
+ }
+
+ obj = &vm->string_object;
+ break;
+
+ case NJS_OBJECT:
+ case NJS_ARRAY:
+ case NJS_OBJECT_BOOLEAN:
+ case NJS_OBJECT_NUMBER:
+ case NJS_OBJECT_STRING:
+ case NJS_REGEXP:
+ case NJS_DATE:
+ case NJS_OBJECT_ERROR:
+ case NJS_OBJECT_EVAL_ERROR:
+ case NJS_OBJECT_INTERNAL_ERROR:
+ case NJS_OBJECT_RANGE_ERROR:
+ case NJS_OBJECT_REF_ERROR:
+ case NJS_OBJECT_SYNTAX_ERROR:
+ case NJS_OBJECT_TYPE_ERROR:
+ case NJS_OBJECT_URI_ERROR:
+ case NJS_OBJECT_VALUE:
+ obj = njs_object(object);
+ break;
+
+ case NJS_FUNCTION:
+ function = njs_function_value_copy(vm, object);
+ if (njs_slow_path(function == NULL)) {
+ return NJS_ERROR;
+ }
+
+ obj = &function->object;
+ break;
+
+ case NJS_EXTERNAL:
+ obj = NULL;
+ break;
+
+ case NJS_UNDEFINED:
+ case NJS_NULL:
+ default:
+ ret = njs_primitive_value_to_string(vm, &pq->value, property);
+
+ if (njs_fast_path(ret == NJS_OK)) {
+ njs_string_get(&pq->value, &pq->lhq.key);
+ njs_type_error(vm, "cannot get property \"%V\" of undefined",
+ &pq->lhq.key);
+ return NJS_ERROR;
+ }
+
+ njs_type_error(vm, "cannot get property \"unknown\" of undefined");
+
+ return NJS_ERROR;
+ }
+
+ ret = njs_primitive_value_to_string(vm, &pq->value, property);
+
+ if (njs_fast_path(ret == NJS_OK)) {
+
+ njs_string_get(&pq->value, &pq->lhq.key);
+ pq->lhq.key_hash = njs_djb_hash(pq->lhq.key.start, pq->lhq.key.length);
+
+ if (obj == NULL) {
+ pq->own = 1;
+ return njs_external_property_query(vm, pq, object);
+ }
+
+ return njs_object_property_query(vm, pq, obj, property);
+ }
+
+ return ret;
+}
+
+
+static njs_int_t
+njs_object_property_query(njs_vm_t *vm, njs_property_query_t *pq,
+ njs_object_t *object, const njs_value_t *property)
+{
+ uint32_t index;
+ njs_int_t ret;
+ njs_bool_t own;
+ njs_array_t *array;
+ njs_object_t *proto;
+ njs_object_prop_t *prop;
+ njs_object_value_t *ov;
+
+ pq->lhq.proto = &njs_object_hash_proto;
+
+ own = pq->own;
+ pq->own = 1;
+
+ proto = object;
+
+ do {
+ pq->prototype = proto;
+
+ if (!njs_is_null_or_undefined_or_boolean(property)) {
+ switch (proto->type) {
+ case NJS_ARRAY:
+ index = njs_value_to_index(property);
+ if (njs_fast_path(index < NJS_ARRAY_MAX_INDEX)) {
+ array = (njs_array_t *) proto;
+ return njs_array_property_query(vm, pq, array, index);
+ }
+
+ break;
+
+ case NJS_OBJECT_STRING:
+ index = njs_value_to_index(property);
+ if (njs_fast_path(index < NJS_STRING_MAX_LENGTH)) {
+ ov = (njs_object_value_t *) proto;
+ ret = njs_string_property_query(vm, pq, &ov->value, index);
+
+ if (njs_fast_path(ret != NJS_DECLINED)) {
+ return ret;
+ }
+ }
+
+ default:
+ break;
+ }
+ }
+
+ ret = njs_lvlhsh_find(&proto->hash, &pq->lhq);
+
+ if (ret == NJS_OK) {
+ prop = pq->lhq.value;
+
+ if (prop->type != NJS_WHITEOUT) {
+ return ret;
+ }
+
+ if (pq->own) {
+ pq->own_whiteout = prop;
+ }
+
+ } else {
+ ret = njs_lvlhsh_find(&proto->shared_hash, &pq->lhq);
+
+ if (ret == NJS_OK) {
+ pq->shared = 1;
+
+ return ret;
+ }
+ }
+
+ if (own) {
+ return NJS_DECLINED;
+ }
+
+ pq->own = 0;
+ proto = proto->__proto__;
+
+ } while (proto != NULL);
+
+ return NJS_DECLINED;
+}
+
+
+static njs_int_t
+njs_array_property_query(njs_vm_t *vm, njs_property_query_t *pq,
+ njs_array_t *array, uint32_t index)
+{
+ uint32_t size;
+ njs_int_t ret;
+ njs_value_t *value;
+ njs_object_prop_t *prop;
+
+ if (index >= array->length) {
+ if (pq->query != NJS_PROPERTY_QUERY_SET) {
+ return NJS_DECLINED;
+ }
+
+ size = index - array->length;
+
+ ret = njs_array_expand(vm, array, 0, size + 1);
+ if (njs_slow_path(ret != NJS_OK)) {
+ return ret;
+ }
+
+ value = &array->start[array->length];
+
+ while (size != 0) {
+ njs_set_invalid(value);
+ value++;
+ size--;
+ }
+
+ array->length = index + 1;
+ }
+
+ prop = &pq->scratch;
+
+ if (pq->query == NJS_PROPERTY_QUERY_GET) {
+ if (!njs_is_valid(&array->start[index])) {
+ return NJS_DECLINED;
+ }
+
+ prop->value = array->start[index];
+ prop->type = NJS_PROPERTY;
+
+ } else {
+ prop->value.data.u.value = &array->start[index];
+ prop->type = NJS_PROPERTY_REF;
+ }
+
+ prop->writable = 1;
+ prop->enumerable = 1;
+ prop->configurable = 1;
+
+ pq->lhq.value = prop;
+
+ return NJS_OK;
+}
+
+
+static njs_int_t
+njs_string_property_query(njs_vm_t *vm, njs_property_query_t *pq,
+ njs_value_t *object, uint32_t index)
+{
+ njs_slice_prop_t slice;
+ njs_object_prop_t *prop;
+ njs_string_prop_t string;
+
+ prop = &pq->scratch;
+
+ slice.start = index;
+ slice.length = 1;
+ slice.string_length = njs_string_prop(&string, object);
+
+ if (slice.start < slice.string_length) {
+ /*
+ * A single codepoint string fits in retval
+ * so the function cannot fail.
+ */
+ (void) njs_string_slice(vm, &prop->value, &string, &slice);
+
+ prop->type = NJS_PROPERTY;
+ prop->writable = 0;
+ prop->enumerable = 1;
+ prop->configurable = 0;
+
+ pq->lhq.value = prop;
+
+ if (pq->query != NJS_PROPERTY_QUERY_GET) {
+ /* pq->lhq.key is used by NJS_VMCODE_PROPERTY_SET for TypeError */
+ njs_uint32_to_string(&pq->value, index);
+ njs_string_get(&pq->value, &pq->lhq.key);
+ }
+
+ return NJS_OK;
+ }
+
+ return NJS_DECLINED;
+}
+
+
+static njs_int_t
+njs_external_property_query(njs_vm_t *vm, njs_property_query_t *pq,
+ njs_value_t *object)
+{
+ void *obj;
+ njs_int_t ret;
+ uintptr_t data;
+ njs_object_prop_t *prop;
+ const njs_extern_t *ext_proto;
+
+ prop = &pq->scratch;
+
+ prop->type = NJS_PROPERTY;
+ prop->writable = 0;
+ prop->enumerable = 1;
+ prop->configurable = 0;
+
+ ext_proto = object->external.proto;
+
+ pq->lhq.proto = &njs_extern_hash_proto;
+ ret = njs_lvlhsh_find(&ext_proto->hash, &pq->lhq);
+
+ if (ret == NJS_OK) {
+ ext_proto = pq->lhq.value;
+
+ prop->value.type = NJS_EXTERNAL;
+ prop->value.data.truth = 1;
+ prop->value.external.proto = ext_proto;
+ prop->value.external.index = object->external.index;
+
+ if ((ext_proto->type & NJS_EXTERN_OBJECT) != 0) {
+ goto done;
+ }
+
+ data = ext_proto->data;
+
+ } else {
+ data = (uintptr_t) &pq->lhq.key;
+ }
+
+ switch (pq->query) {
+
+ case NJS_PROPERTY_QUERY_GET:
+ if (ext_proto->get != NULL) {
+ obj = njs_extern_object(vm, object);
+ ret = ext_proto->get(vm, &prop->value, obj, data);
+ if (njs_slow_path(ret != NJS_OK)) {
+ return ret;
+ }
+ }
+
+ break;
+
+ case NJS_PROPERTY_QUERY_SET:
+ case NJS_PROPERTY_QUERY_DELETE:
+
+ prop->type = NJS_PROPERTY_HANDLER;
+ prop->name = *object;
+
+ if (pq->query == NJS_PROPERTY_QUERY_SET) {
+ prop->writable = (ext_proto->set != NULL);
+ prop->value.data.u.prop_handler = njs_external_property_set;
+
+ } else {
+ prop->configurable = (ext_proto->find != NULL);
+ prop->value.data.u.prop_handler = njs_external_property_delete;
+ }
+
+ pq->ext_data = data;
+ pq->ext_proto = ext_proto;
+ pq->ext_index = object->external.index;
+
+ pq->lhq.value = prop;
+
+ vm->stash = (uintptr_t) pq;
+
+ return NJS_OK;
+ }
+
+done:
+
+ if (ext_proto->type == NJS_EXTERN_METHOD) {
+ njs_set_function(&prop->value, ext_proto->function);
+ }
+
+ pq->lhq.value = prop;
+
+ return ret;
+}
+
+
+static njs_int_t
+njs_external_property_set(njs_vm_t *vm, njs_value_t *value, njs_value_t *setval,
+ njs_value_t *retval)
+{
+ void *obj;
+ njs_int_t ret;
+ njs_str_t s;
+ njs_property_query_t *pq;
+
+ pq = (njs_property_query_t *) vm->stash;
+
+ if (!njs_is_null_or_undefined(setval)) {
+ ret = njs_vm_value_to_string(vm, &s, setval);
+ if (njs_slow_path(ret != NJS_OK)) {
+ return ret;
+ }
+
+ } else {
+ s = njs_str_value("");
+ }
+
+ *retval = *setval;
+
+ obj = njs_extern_index(vm, pq->ext_index);
+
+ return pq->ext_proto->set(vm, obj, pq->ext_data, &s);
+}
+
+
+static njs_int_t
+njs_external_property_delete(njs_vm_t *vm, njs_value_t *value,
+ njs_value_t *unused, njs_value_t *unused2)
+{
+ void *obj;
+ njs_property_query_t *pq;
+
+ pq = (njs_property_query_t *) vm->stash;
+
+ obj = njs_extern_index(vm, pq->ext_index);
+
+ return pq->ext_proto->find(vm, obj, pq->ext_data, 1);
+}
+
+
+/*
+ * ES5.1, 8.12.3: [[Get]].
+ * NJS_OK property has been found in object,
+ * retval will contain the property's value
+ *
+ * NJS_DECLINED property was not found in object
+ * NJS_ERROR exception has been thrown.
+ * retval will contain undefined
+ */
+njs_int_t
+njs_value_property(njs_vm_t *vm, njs_value_t *value, njs_value_t *property,
+ njs_value_t *retval)
+{
+ njs_int_t ret;
+ njs_object_prop_t *prop;
+ njs_property_query_t pq;
+
+ njs_property_query_init(&pq, NJS_PROPERTY_QUERY_GET, 0);
+
+ ret = njs_property_query(vm, &pq, value, property);
+
+ switch (ret) {
+
+ case NJS_OK:
+ prop = pq.lhq.value;
+
+ switch (prop->type) {
+
+ case NJS_METHOD:
+ if (pq.shared) {
+ ret = njs_prop_private_copy(vm, &pq);
+
+ if (njs_slow_path(ret != NJS_OK)) {
+ return ret;
+ }
+
+ prop = pq.lhq.value;
+ }
+
+ /* Fall through. */
+
+ case NJS_PROPERTY:
+ if (njs_is_data_descriptor(prop)) {
+ *retval = prop->value;
+ break;
+ }
+
+ if (njs_is_undefined(&prop->getter)) {
+ *retval = njs_value_undefined;
+ break;
+ }
+
+ return njs_function_apply(vm, njs_function(&prop->getter), value,
+ 1, retval);
+
+ case NJS_PROPERTY_HANDLER:
+ pq.scratch = *prop;
+ prop = &pq.scratch;
+ ret = prop->value.data.u.prop_handler(vm, value, NULL,
+ &prop->value);
+
+ if (njs_slow_path(ret != NJS_OK)) {
+ return ret;
+ }
+
+ *retval = prop->value;
+ break;
+
+ default:
+ njs_internal_error(vm, "unexpected property type \"%s\" "
+ "while getting",
+ njs_prop_type_string(prop->type));
+
+ return NJS_ERROR;
+ }
+
+ break;
+
+ case NJS_DECLINED:
+ *retval = njs_value_undefined;
+
+ return NJS_DECLINED;
+
+ case NJS_ERROR:
+ default:
+
+ return ret;
+ }
+
+ return NJS_OK;
+}
+
+
+/*
+ * NJS_OK property has been set successfully
+ * NJS_ERROR exception has been thrown.
+ */
+njs_int_t
+njs_value_property_set(njs_vm_t *vm, njs_value_t *object,
+ njs_value_t *property, njs_value_t *value)
+{
+ njs_int_t ret;
+ njs_object_prop_t *prop, *shared;
+ njs_property_query_t pq;
+
+ if (njs_is_primitive(object)) {
+ njs_type_error(vm, "property set on primitive %s type",
+ njs_type_string(object->type));
+ return NJS_ERROR;
+ }
+
+ shared = NULL;
+
+ njs_property_query_init(&pq, NJS_PROPERTY_QUERY_SET, 0);
+
+ ret = njs_property_query(vm, &pq, object, property);
+
+ switch (ret) {
+
+ case NJS_OK:
+ prop = pq.lhq.value;
+
+ if (njs_is_data_descriptor(prop)) {
+ if (!prop->writable) {
+ njs_type_error(vm,
+ "Cannot assign to read-only property \"%V\" of %s",
+ &pq.lhq.key, njs_type_string(object->type));
+ return NJS_ERROR;
+ }
+
+ } else {
+ if (njs_is_function(&prop->setter)) {
+ return njs_function_call(vm, njs_function(&prop->setter),
+ object, value, 1, &vm->retval);
+ }
+
+ njs_type_error(vm,
+ "Cannot set property \"%V\" of %s which has only a getter",
+ &pq.lhq.key, njs_type_string(object->type));
+ return NJS_ERROR;
+ }
+
+ if (prop->type == NJS_PROPERTY_HANDLER) {
+ ret = prop->value.data.u.prop_handler(vm, object, value,
+ &vm->retval);
+ if (ret != NJS_DECLINED) {
+ return ret;
+ }
+ }
+
+ if (pq.own) {
+ switch (prop->type) {
+ case NJS_PROPERTY:
+ case NJS_METHOD:
+ if (njs_slow_path(pq.shared)) {
+ shared = prop;
+ break;
+ }
+
+ goto found;
+
+ case NJS_PROPERTY_REF:
+ *prop->value.data.u.value = *value;
+ return NJS_OK;
+
+ default:
+ njs_internal_error(vm, "unexpected property type \"%s\" "
+ "while setting",
+ njs_prop_type_string(prop->type));
+
+ return NJS_ERROR;
+ }
+
+ break;
+ }
+
+ /* Fall through. */
+
+ case NJS_DECLINED:
+ if (njs_slow_path(pq.own_whiteout != NULL)) {
+ /* Previously deleted property. */
+ prop = pq.own_whiteout;
+
+ prop->type = NJS_PROPERTY;
+ prop->enumerable = 1;
+ prop->configurable = 1;
+ prop->writable = 1;
+
+ goto found;
+ }
+
+ break;
+
+ case NJS_ERROR:
+ default:
+
+ return ret;
+ }
+
+ if (njs_slow_path(!njs_object(object)->extensible)) {
+ njs_type_error(vm, "Cannot add property \"%V\", "
+ "object is not extensible", &pq.lhq.key);
+ return NJS_ERROR;
+ }
+
+ prop = njs_object_prop_alloc(vm, &pq.value, &njs_value_undefined, 1);
+ if (njs_slow_path(prop == NULL)) {
+ return NJS_ERROR;
+ }
+
+ if (njs_slow_path(shared != NULL)) {
+ prop->enumerable = shared->enumerable;
+ prop->configurable = shared->configurable;
+ }
+
+ pq.lhq.replace = 0;
+ pq.lhq.value = prop;
+ pq.lhq.pool = vm->mem_pool;
+
+ ret = njs_lvlhsh_insert(njs_object_hash(object), &pq.lhq);
+ if (njs_slow_path(ret != NJS_OK)) {
+ njs_internal_error(vm, "lvlhsh insert failed");
+ return NJS_ERROR;
+ }
+
+found:
+
+ prop->value = *value;
+
+ return NJS_OK;
+}
} njs_object_enum_t;
+typedef enum {
+ NJS_PROPERTY = 0,
+ NJS_PROPERTY_REF,
+ NJS_METHOD,
+ NJS_PROPERTY_HANDLER,
+ NJS_WHITEOUT,
+} njs_object_prop_type_t;
+
+
+/*
+ * Attributes are generally used as Boolean values.
+ * The UNSET value is can be seen:
+ * for newly created property descriptors in njs_define_property(),
+ * for writable attribute of accessor descriptors (desc->writable
+ * cannot be used as a boolean value).
+ */
+typedef enum {
+ NJS_ATTRIBUTE_FALSE = 0,
+ NJS_ATTRIBUTE_TRUE = 1,
+ NJS_ATTRIBUTE_UNSET,
+} njs_object_attribute_t;
+
+
+typedef struct {
+ /* Must be aligned to njs_value_t. */
+ njs_value_t value;
+ njs_value_t name;
+ njs_value_t getter;
+ njs_value_t setter;
+
+ /* TODO: get rid of types */
+ njs_object_prop_type_t type:8; /* 3 bits */
+
+ njs_object_attribute_t writable:8; /* 2 bits */
+ njs_object_attribute_t enumerable:8; /* 2 bits */
+ njs_object_attribute_t configurable:8; /* 2 bits */
+} njs_object_prop_t;
+
+
+typedef struct {
+ njs_lvlhsh_query_t lhq;
+
+ /* scratch is used to get the value of an NJS_PROPERTY_HANDLER property. */
+ njs_object_prop_t scratch;
+
+ /* These three fields are used for NJS_EXTERNAL setters. */
+ uintptr_t ext_data;
+ const njs_extern_t *ext_proto;
+ uint32_t ext_index;
+
+ njs_value_t value;
+ njs_object_t *prototype;
+ njs_object_prop_t *own_whiteout;
+ uint8_t query;
+ uint8_t shared;
+ uint8_t own;
+} njs_property_query_t;
+
+
#define njs_value(_type, _truth, _number) { \
.data = { \
.type = _type, \
#endif
+#define njs_property_query_init(pq, _query, _own) \
+ do { \
+ (pq)->lhq.key.length = 0; \
+ (pq)->lhq.value = NULL; \
+ (pq)->own_whiteout = NULL; \
+ (pq)->query = _query; \
+ (pq)->shared = 0; \
+ (pq)->own = _own; \
+ } while (0)
+
+
void njs_value_retain(njs_value_t *value);
void njs_value_release(njs_vm_t *vm, njs_value_t *value);
njs_int_t njs_value_to_primitive(njs_vm_t *vm, njs_value_t *dst,
njs_bool_t njs_string_eq(const njs_value_t *v1, const njs_value_t *v2);
+njs_int_t njs_property_query(njs_vm_t *vm, njs_property_query_t *pq,
+ njs_value_t *object, njs_value_t *property);
+njs_int_t njs_value_property(njs_vm_t *vm, njs_value_t *value,
+ njs_value_t *property, njs_value_t *retval);
+njs_int_t njs_value_property_set(njs_vm_t *vm, njs_value_t *object,
+ njs_value_t *property, njs_value_t *value);
+
njs_inline njs_int_t
njs_value_to_numeric(njs_vm_t *vm, njs_value_t *dst, njs_value_t *value)
projects / njs.git / commitdiff