/* Resolve a bound function on value stack top to a non-bound target
* (leave other values as is).
*/
DUK_INTERNAL void duk_resolve_nonbound_function(duk_context *ctx) {
duk_tval *tv;
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h;
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
if (DUK_HOBJECT_HAS_BOUNDFUNC(h)) {
duk_push_tval(ctx, &((duk_hboundfunc *) h)->target);
duk_replace(ctx, -2);
#if 0
DUK_TVAL_SET_TVAL(tv, &((duk_hboundfunc *) h)->target);
DUK_TVAL_INCREF(thr, tv);
DUK_HOBJECT_DECREF_NORZ(thr, h);
#endif
/* Rely on Function.prototype.bind() on never creating a bound
* function whose target is not proper. This is now safe
* because the target is not even an internal property but a
* struct member.
*/
DUK_ASSERT(duk_is_lightfunc(ctx, -1) || duk_is_callable(ctx, -1));
}
}
/* Lightfuncs cannot be bound but are always callable and
* constructable.
*/
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_seal_freeze_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
duk_bool_t is_freeze;
DUK_ASSERT_TOP(ctx, 1);
is_freeze = (duk_bool_t) duk_get_current_magic(ctx);
if (duk_is_buffer(ctx, 0)) {
/* Plain buffer: already sealed, but not frozen (and can't be frozen
* because index properties can't be made non-writable.
*/
if (is_freeze) {
goto fail_cannot_freeze;
}
return 1;
} else if (duk_is_lightfunc(ctx, 0)) {
/* Lightfunc: already sealed and frozen, success. */
return 1;
}
#if 0
/* Seal/freeze are quite rare in practice so it'd be nice to get the
* correct behavior simply via automatic promotion (at the cost of some
* memory churn). However, the promoted objects don't behave the same,
* e.g. promoted lightfuncs are extensible.
*/
h = duk_require_hobject_promote_mask(ctx, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER);
#endif
h = duk_get_hobject(ctx, 0);
if (h == NULL) {
/* ES2015 Sections 19.1.2.5, 19.1.2.17 */
return 1;
}
if (is_freeze && DUK_HOBJECT_IS_BUFOBJ(h)) {
/* Buffer objects cannot be frozen because there's no internal
* support for making virtual array indices non-writable.
*/
DUK_DD(DUK_DDPRINT("cannot freeze a buffer object"));
goto fail_cannot_freeze;
}
duk_hobject_object_seal_freeze_helper(thr, h, is_freeze);
/* Sealed and frozen objects cannot gain any more properties,
* so this is a good time to compact them.
*/
duk_hobject_compact_props(thr, h);
return 1;
fail_cannot_freeze:
DUK_DCERROR_TYPE_INVALID_ARGS(thr); /* XXX: proper error message */
}
static duk_ret_t test_func(duk_context *ctx, void *udata) {
(void) udata;
if (ctx) {
printf("dummy - return here\n"); fflush(stdout);
return 0;
}
/* Up-to-date for Duktape 1.3.0, alphabetical order:
* $ cd website/api; ls *.yaml
*/
(void) duk_alloc_raw(ctx, 0);
(void) duk_alloc(ctx, 0);
(void) duk_base64_decode(ctx, 0);
(void) duk_base64_encode(ctx, 0);
(void) duk_buffer_to_string(ctx, 0);
(void) duk_call_method(ctx, 0);
(void) duk_call_prop(ctx, 0, 0);
(void) duk_call(ctx, 0);
(void) duk_char_code_at(ctx, 0, 0);
(void) duk_check_stack_top(ctx, 0);
(void) duk_check_stack(ctx, 0);
(void) duk_check_type_mask(ctx, 0, 0);
(void) duk_check_type(ctx, 0, 0);
(void) duk_compact(ctx, 0);
(void) duk_compile_lstring_filename(ctx, 0, "dummy", 0);
(void) duk_compile_lstring(ctx, 0, "dummy", 0);
(void) duk_compile_string_filename(ctx, 0, "dummy");
(void) duk_compile_string(ctx, 0, "dummy");
(void) duk_compile(ctx, 0);
(void) duk_concat(ctx, 0);
(void) duk_config_buffer(ctx, 0, NULL, 0);
(void) duk_copy(ctx, 0, 0);
(void) duk_create_heap_default();
(void) duk_create_heap(NULL, NULL, NULL, NULL, NULL);
(void) duk_debugger_attach(ctx, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
(void) duk_debugger_cooperate(ctx);
(void) duk_debugger_detach(ctx);
(void) duk_debugger_notify(ctx, 0);
(void) duk_debugger_pause(ctx);
(void) duk_decode_string(ctx, 0, NULL, NULL);
(void) duk_def_prop(ctx, 0, 0);
(void) duk_del_prop_index(ctx, 0, 0);
(void) duk_del_prop_string(ctx, 0, "dummy");
(void) duk_del_prop(ctx, 0);
(void) duk_destroy_heap(ctx);
(void) duk_dump_function(ctx);
(void) duk_dup_top(ctx);
(void) duk_dup(ctx, 0);
(void) duk_enum(ctx, 0, 0);
(void) duk_equals(ctx, 0, 0);
duk_error_va(ctx, 0, NULL, NULL);
duk_error(ctx, 0, "dummy"); /* (void) cast won't work without variadic macros */
(void) duk_eval_lstring_noresult(ctx, "dummy", 0);
(void) duk_eval_lstring(ctx, "dummy", 0);
(void) duk_eval_noresult(ctx);
(void) duk_eval_string_noresult(ctx, "dummy");
(void) duk_eval_string(ctx, "dummy");
(void) duk_eval(ctx);
(void) duk_fatal(ctx, "dummy");
(void) duk_free_raw(ctx, NULL);
(void) duk_free(ctx, NULL);
(void) duk_gc(ctx, 0);
(void) duk_get_boolean(ctx, 0);
(void) duk_get_buffer_data(ctx, 0, NULL);
(void) duk_get_buffer(ctx, 0, NULL);
(void) duk_get_c_function(ctx, 0);
(void) duk_get_context(ctx, 0);
(void) duk_get_current_magic(ctx);
(void) duk_get_error_code(ctx, 0);
(void) duk_get_finalizer(ctx, 0);
(void) duk_get_global_string(ctx, 0);
(void) duk_get_heapptr(ctx, 0);
(void) duk_get_int(ctx, 0);
(void) duk_get_length(ctx, 0);
(void) duk_get_lstring(ctx, 0, NULL);
(void) duk_get_magic(ctx, 0);
(void) duk_get_memory_functions(ctx, NULL);
(void) duk_get_number(ctx, 0);
(void) duk_get_pointer(ctx, 0);
(void) duk_get_prop_index(ctx, 0, 0);
(void) duk_get_prop_string(ctx, 0, "dummy");
(void) duk_get_prop(ctx, 0);
(void) duk_get_prototype(ctx, 0);
(void) duk_get_string(ctx, 0);
(void) duk_get_top_index(ctx);
(void) duk_get_top(ctx);
(void) duk_get_type_mask(ctx, 0);
(void) duk_get_type(ctx, 0);
(void) duk_get_uint(ctx, 0);
(void) duk_has_prop_index(ctx, 0, 0);
(void) duk_has_prop_string(ctx, 0, "dummy");
(void) duk_has_prop(ctx, 0);
(void) duk_hex_decode(ctx, 0);
(void) duk_hex_encode(ctx, 0);
(void) duk_insert(ctx, 0);
(void) duk_instanceof(ctx, 0, 0);
(void) duk_is_array(ctx, 0);
(void) duk_is_boolean(ctx, 0);
(void) duk_is_bound_function(ctx, 0);
(void) duk_is_buffer(ctx, 0);
(void) duk_is_callable(ctx, 0);
(void) duk_is_c_function(ctx, 0);
(void) duk_is_constructor_call(ctx);
(void) duk_is_dynamic_buffer(ctx, 0);
(void) duk_is_ecmascript_function(ctx, 0);
(void) duk_is_error(ctx, 0);
(void) duk_is_eval_error(ctx, 0);
(void) duk_is_fixed_buffer(ctx, 0);
(void) duk_is_function(ctx, 0);
(void) duk_is_lightfunc(ctx, 0);
(void) duk_is_nan(ctx, 0);
(void) duk_is_null_or_undefined(ctx, 0);
(void) duk_is_null(ctx, 0);
(void) duk_is_number(ctx, 0);
(void) duk_is_object_coercible(ctx, 0);
(void) duk_is_object(ctx, 0);
(void) duk_is_pointer(ctx, 0);
(void) duk_is_primitive(ctx, 0);
(void) duk_is_range_error(ctx, 0);
(void) duk_is_reference_error(ctx, 0);
(void) duk_is_strict_call(ctx);
(void) duk_is_string(ctx, 0);
(void) duk_is_syntax_error(ctx, 0);
(void) duk_is_thread(ctx, 0);
(void) duk_is_type_error(ctx, 0);
(void) duk_is_undefined(ctx, 0);
(void) duk_is_uri_error(ctx, 0);
(void) duk_is_valid_index(ctx, 0);
(void) duk_join(ctx, 0);
(void) duk_json_decode(ctx, 0);
(void) duk_json_encode(ctx, 0);
(void) duk_load_function(ctx);
(void) duk_map_string(ctx, 0, NULL, NULL);
(void) duk_new(ctx, 0);
(void) duk_next(ctx, 0, 0);
(void) duk_normalize_index(ctx, 0);
(void) duk_pcall_method(ctx, 0);
(void) duk_pcall_prop(ctx, 0, 0);
(void) duk_pcall(ctx, 0);
(void) duk_pcompile_lstring_filename(ctx, 0, "dummy", 0);
(void) duk_pcompile_lstring(ctx, 0, "dummy", 0);
(void) duk_pcompile_string_filename(ctx, 0, "dummy");
(void) duk_pcompile_string(ctx, 0, "dummy");
(void) duk_pcompile(ctx, 0);
(void) duk_peval_lstring_noresult(ctx, "dummy", 0);
(void) duk_peval_lstring(ctx, "dummy", 0);
(void) duk_peval_noresult(ctx);
(void) duk_peval_string_noresult(ctx, "dummy");
(void) duk_peval_string(ctx, "dummy");
(void) duk_peval(ctx);
(void) duk_pnew(ctx, 0);
(void) duk_pop_2(ctx);
(void) duk_pop_3(ctx);
(void) duk_pop_n(ctx, 0);
(void) duk_pop(ctx);
(void) duk_push_array(ctx);
(void) duk_push_boolean(ctx, 0);
(void) duk_push_buffer_object(ctx, 0, 0, 0, 0);
(void) duk_push_buffer(ctx, 0, 0);
(void) duk_push_c_function(ctx, NULL, 0);
(void) duk_push_c_lightfunc(ctx, NULL, 0, 0, 0);
(void) duk_push_context_dump(ctx);
(void) duk_push_current_function(ctx);
(void) duk_push_current_thread(ctx);
(void) duk_push_dynamic_buffer(ctx, 0);
(void) duk_push_error_object_va(ctx, 0, NULL, NULL);
(void) duk_push_error_object(ctx, 0, "dummy");
(void) duk_push_external_buffer(ctx);
(void) duk_push_false(ctx);
(void) duk_push_fixed_buffer(ctx, 0);
(void) duk_push_global_object(ctx);
(void) duk_push_global_stash(ctx);
(void) duk_push_heap_stash(ctx);
(void) duk_push_heapptr(ctx, NULL);
(void) duk_push_int(ctx, 0);
(void) duk_push_lstring(ctx, "dummy", 0);
(void) duk_push_nan(ctx);
(void) duk_push_null(ctx);
(void) duk_push_number(ctx, 0.0);
(void) duk_push_object(ctx);
(void) duk_push_pointer(ctx, NULL);
(void) duk_push_sprintf(ctx, "dummy");
(void) duk_push_string(ctx, "dummy");
(void) duk_push_this(ctx);
(void) duk_push_thread_new_globalenv(ctx);
(void) duk_push_thread_stash(ctx, NULL);
(void) duk_push_thread(ctx);
(void) duk_push_true(ctx);
(void) duk_push_uint(ctx, 0);
(void) duk_push_undefined(ctx);
(void) duk_push_vsprintf(ctx, "dummy", NULL);
(void) duk_put_function_list(ctx, 0, NULL);
(void) duk_put_global_string(ctx, NULL);
(void) duk_put_number_list(ctx, 0, NULL);
(void) duk_put_prop_index(ctx, 0, 0);
(void) duk_put_prop_string(ctx, 0, "dummy");
(void) duk_put_prop(ctx, 0);
(void) duk_realloc_raw(ctx, NULL, 0);
(void) duk_realloc(ctx, NULL, 0);
(void) duk_remove(ctx, 0);
(void) duk_replace(ctx, 0);
(void) duk_require_boolean(ctx, 0);
(void) duk_require_buffer_data(ctx, 0, NULL);
(void) duk_require_buffer(ctx, 0, NULL);
(void) duk_require_c_function(ctx, 0);
(void) duk_require_callable(ctx, 0);
(void) duk_require_context(ctx, 0);
(void) duk_require_function(ctx, 0);
(void) duk_require_heapptr(ctx, 0);
(void) duk_require_int(ctx, 0);
(void) duk_require_lstring(ctx, 0, NULL);
(void) duk_require_normalize_index(ctx, 0);
(void) duk_require_null(ctx, 0);
(void) duk_require_number(ctx, 0);
(void) duk_require_object_coercible(ctx, 0);
(void) duk_require_pointer(ctx, 0);
(void) duk_require_stack_top(ctx, 0);
(void) duk_require_stack(ctx, 0);
(void) duk_require_string(ctx, 0);
(void) duk_require_top_index(ctx);
(void) duk_require_type_mask(ctx, 0, 0);
(void) duk_require_uint(ctx, 0);
(void) duk_require_undefined(ctx, 0);
(void) duk_require_valid_index(ctx, 0);
(void) duk_resize_buffer(ctx, 0, 0);
(void) duk_safe_call(ctx, NULL, NULL, 0, 0);
(void) duk_safe_to_lstring(ctx, 0, NULL);
(void) duk_safe_to_string(ctx, 0);
(void) duk_set_finalizer(ctx, 0);
(void) duk_set_global_object(ctx);
(void) duk_set_magic(ctx, 0, 0);
(void) duk_set_prototype(ctx, 0);
(void) duk_set_top(ctx, 0);
(void) duk_steal_buffer(ctx, 0, NULL);
(void) duk_strict_equals(ctx, 0, 0);
(void) duk_substring(ctx, 0, 0, 0);
(void) duk_swap_top(ctx, 0);
(void) duk_swap(ctx, 0, 0);
(void) duk_throw(ctx);
(void) duk_to_boolean(ctx, 0);
(void) duk_to_buffer(ctx, 0, NULL);
(void) duk_to_defaultvalue(ctx, 0, 0);
(void) duk_to_dynamic_buffer(ctx, 0, NULL);
(void) duk_to_fixed_buffer(ctx, 0, NULL);
(void) duk_to_int32(ctx, 0);
(void) duk_to_int(ctx, 0);
(void) duk_to_lstring(ctx, 0, NULL);
(void) duk_to_null(ctx, 0);
(void) duk_to_number(ctx, 0);
(void) duk_to_object(ctx, 0);
(void) duk_to_pointer(ctx, 0);
(void) duk_to_primitive(ctx, 0, 0);
(void) duk_to_string(ctx, 0);
(void) duk_to_uint16(ctx, 0);
(void) duk_to_uint32(ctx, 0);
(void) duk_to_uint(ctx, 0);
(void) duk_to_undefined(ctx, 0);
(void) duk_trim(ctx, 0);
(void) duk_xcopy_top(ctx, NULL, 0);
(void) duk_xmove_top(ctx, NULL, 0);
printf("never here\n"); fflush(stdout);
return 0;
}
DUK_EXTERNAL void duk_new(duk_context *ctx, duk_idx_t nargs) {
/*
* There are two [[Construct]] operations in the specification:
*
* - E5 Section 13.2.2: for Function objects
* - E5 Section 15.3.4.5.2: for "bound" Function objects
*
* The chain of bound functions is resolved in Section 15.3.4.5.2,
* with arguments "piling up" until the [[Construct]] internal
* method is called on the final, actual Function object. Note
* that the "prototype" property is looked up *only* from the
* final object, *before* calling the constructor.
*
* Currently we follow the bound function chain here to get the
* "prototype" property value from the final, non-bound function.
* However, we let duk_handle_call() handle the argument "piling"
* when the constructor is called. The bound function chain is
* thus now processed twice.
*
* When constructing new Array instances, an unnecessary object is
* created and discarded now: the standard [[Construct]] creates an
* object, and calls the Array constructor. The Array constructor
* returns an Array instance, which is used as the result value for
* the "new" operation; the object created before the Array constructor
* call is discarded.
*
* This would be easy to fix, e.g. by knowing that the Array constructor
* will always create a replacement object and skip creating the fallback
* object in that case.
*
* Note: functions called via "new" need to know they are called as a
* constructor. For instance, built-in constructors behave differently
* depending on how they are called.
*/
/* XXX: merge this with duk_js_call.c, as this function implements
* core semantics (or perhaps merge the two files altogether).
*/
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *proto;
duk_hobject *cons;
duk_hobject *fallback;
duk_idx_t idx_cons;
duk_small_uint_t call_flags;
DUK_ASSERT_CTX_VALID(ctx);
/* [... constructor arg1 ... argN] */
idx_cons = duk_require_normalize_index(ctx, -nargs - 1);
DUK_DDD(DUK_DDDPRINT("top=%ld, nargs=%ld, idx_cons=%ld",
(long) duk_get_top(ctx), (long) nargs, (long) idx_cons));
/* XXX: code duplication */
/*
* Figure out the final, non-bound constructor, to get "prototype"
* property.
*/
duk_dup(ctx, idx_cons);
for (;;) {
duk_tval *tv;
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
cons = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(cons != NULL);
if (!DUK_HOBJECT_IS_CALLABLE(cons) || !DUK_HOBJECT_HAS_CONSTRUCTABLE(cons)) {
/* Checking callability of the immediate target
* is important, same for constructability.
* Checking it for functions down the bound
* function chain is not strictly necessary
* because .bind() should normally reject them.
* But it's good to check anyway because it's
* technically possible to edit the bound function
* chain via internal keys.
*/
goto not_constructable;
}
if (!DUK_HOBJECT_HAS_BOUNDFUNC(cons)) {
break;
}
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
/* Lightfuncs cannot be bound. */
break;
} else {
/* Anything else is not constructable. */
goto not_constructable;
}
duk_get_prop_stridx_short(ctx, -1, DUK_STRIDX_INT_TARGET); /* -> [... cons target] */
duk_remove_m2(ctx); /* -> [... target] */
}
DUK_ASSERT(duk_is_callable(ctx, -1));
DUK_ASSERT(duk_is_lightfunc(ctx, -1) ||
(duk_get_hobject(ctx, -1) != NULL && !DUK_HOBJECT_HAS_BOUNDFUNC(duk_get_hobject(ctx, -1))));
/* [... constructor arg1 ... argN final_cons] */
/*
* Create "fallback" object to be used as the object instance,
* unless the constructor returns a replacement value.
* Its internal prototype needs to be set based on "prototype"
* property of the constructor.
*/
duk_push_object(ctx); /* class Object, extensible */
/* [... constructor arg1 ... argN final_cons fallback] */
duk_get_prop_stridx_short(ctx, -2, DUK_STRIDX_PROTOTYPE);
proto = duk_get_hobject(ctx, -1);
if (!proto) {
DUK_DDD(DUK_DDDPRINT("constructor has no 'prototype' property, or value not an object "
"-> leave standard Object prototype as fallback prototype"));
} else {
DUK_DDD(DUK_DDDPRINT("constructor has 'prototype' property with object value "
"-> set fallback prototype to that value: %!iO", (duk_heaphdr *) proto));
fallback = duk_get_hobject(ctx, -2);
DUK_ASSERT(fallback != NULL);
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, fallback, proto);
}
duk_pop(ctx);
/* [... constructor arg1 ... argN final_cons fallback] */
/*
* Manipulate callstack for the call.
*/
duk_dup_top(ctx);
duk_insert(ctx, idx_cons + 1); /* use fallback as 'this' value */
duk_insert(ctx, idx_cons); /* also stash it before constructor,
* in case we need it (as the fallback value)
*/
duk_pop(ctx); /* pop final_cons */
/* [... fallback constructor fallback(this) arg1 ... argN];
* Note: idx_cons points to first 'fallback', not 'constructor'.
*/
DUK_DDD(DUK_DDDPRINT("before call, idx_cons+1 (constructor) -> %!T, idx_cons+2 (fallback/this) -> %!T, "
"nargs=%ld, top=%ld",
(duk_tval *) duk_get_tval(ctx, idx_cons + 1),
(duk_tval *) duk_get_tval(ctx, idx_cons + 2),
(long) nargs,
(long) duk_get_top(ctx)));
/*
* Call the constructor function (called in "constructor mode").
*/
call_flags = DUK_CALL_FLAG_CONSTRUCTOR_CALL; /* not protected, respect reclimit, is a constructor call */
duk_handle_call_unprotected(thr, /* thread */
nargs, /* num_stack_args */
call_flags); /* call_flags */
/* [... fallback retval] */
DUK_DDD(DUK_DDDPRINT("constructor call finished, fallback=%!iT, retval=%!iT",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
/*
* Determine whether to use the constructor return value as the created
* object instance or not.
*/
if (duk_check_type_mask(ctx, -1, DUK_TYPE_MASK_OBJECT |
DUK_TYPE_MASK_BUFFER |
DUK_TYPE_MASK_LIGHTFUNC)) {
duk_remove_m2(ctx);
} else {
duk_pop(ctx);
}
/*
* Augment created errors upon creation (not when they are thrown or
* rethrown). __FILE__ and __LINE__ are not desirable here; the call
* stack reflects the caller which is correct.
*/
#if defined(DUK_USE_AUGMENT_ERROR_CREATE)
duk_hthread_sync_currpc(thr);
duk_err_augment_error_create(thr, thr, NULL, 0, 1 /*noblame_fileline*/);
#endif
/* [... retval] */
return;
not_constructable:
#if defined(DUK_USE_VERBOSE_ERRORS)
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not constructable", duk_get_type_name(ctx, -1));
#else
DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not constructable", duk_push_string_readable(ctx, -1));
#endif
#else
DUK_ERROR_TYPE(thr, "not constructable");
#endif
}
/* Shared helper to implement ES6 Object.setPrototypeOf and
* Object.prototype.__proto__ setter.
*
* https://people.mozilla.org/~jorendorff/es6-draft.html#sec-get-object.prototype.__proto__
* https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.setprototypeof
*/
DUK_INTERNAL duk_ret_t duk_bi_object_setprototype_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_obj;
duk_hobject *h_new_proto;
duk_hobject *h_curr;
duk_ret_t ret_success = 1; /* retval for success path */
/* Preliminaries for __proto__ and setPrototypeOf (E6 19.1.2.18 steps 1-4);
* magic: 0=setter call, 1=Object.setPrototypeOf
*/
if (duk_get_current_magic(ctx) == 0) {
duk_push_this_check_object_coercible(ctx);
duk_insert(ctx, 0);
if (!duk_check_type_mask(ctx, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT)) {
return 0;
}
/* __proto__ setter returns 'undefined' on success unlike the
* setPrototypeOf() call which returns the target object.
*/
ret_success = 0;
} else {
duk_require_object_coercible(ctx, 0);
duk_require_type_mask(ctx, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT);
}
h_new_proto = duk_get_hobject(ctx, 1);
/* h_new_proto may be NULL */
if (duk_is_lightfunc(ctx, 0)) {
if (h_new_proto == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]) {
goto skip;
}
goto fail_nonextensible;
}
h_obj = duk_get_hobject(ctx, 0);
if (!h_obj) {
goto skip;
}
DUK_ASSERT(h_obj != NULL);
/* [[SetPrototypeOf]] standard behavior, E6 9.1.2 */
/* NOTE: steps 7-8 seem to be a cut-paste bug in the E6 draft */
/* TODO: implement Proxy object support here */
if (h_new_proto == DUK_HOBJECT_GET_PROTOTYPE(h_obj)) {
goto skip;
}
if (!DUK_HOBJECT_HAS_EXTENSIBLE(h_obj)) {
goto fail_nonextensible;
}
for (h_curr = h_new_proto; h_curr != NULL; h_curr = DUK_HOBJECT_GET_PROTOTYPE(h_curr)) {
/* Loop prevention */
if (h_curr == h_obj) {
goto fail_loop;
}
}
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h_obj, h_new_proto);
/* fall thru */
skip:
duk_set_top(ctx, 1);
return ret_success;
fail_nonextensible:
fail_loop:
return DUK_RET_TYPE_ERROR;
}
//duk_bool_t duk_is_lightfunc(duk_context *ctx, duk_idx_t index);
duk_bool_t aperl_duk_is_lightfunc(duk_context *ctx, duk_idx_t index) {
duk_bool_t ret = duk_is_lightfunc(ctx, index);
return ret;
}
