DUK_INTERNAL duk_bool_t duk_js_in(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y) { duk_context *ctx = (duk_context *) thr; duk_bool_t retval; /* * Get the values onto the stack first. It would be possible to cover * some normal cases without resorting to the value stack (e.g. if * lval is already a string). */ /* XXX: The ES5/5.1/6 specifications require that the key in 'key in obj' * must be string coerced before the internal HasProperty() algorithm is * invoked. A fast path skipping coercion could be safely implemented for * numbers (as number-to-string coercion has no side effects). For ES6 * proxy behavior, the trap 'key' argument must be in a string coerced * form (which is a shame). */ /* TypeError if rval is not an object (or lightfunc which should behave * like a Function instance). */ duk_push_tval(ctx, tv_x); duk_push_tval(ctx, tv_y); duk_require_type_mask(ctx, -1, DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC); duk_to_string(ctx, -2); /* coerce lval with ToString() */ retval = duk_hobject_hasprop(thr, duk_get_tval(ctx, -1), duk_get_tval(ctx, -2)); duk_pop_2(ctx); return retval; }
/* 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_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_obj = duk_get_hobject(ctx, 0); if (!h_obj) { goto skip; } h_new_proto = duk_get_hobject(ctx, 1); DUK_ASSERT(h_obj != NULL); /* h_new_proto may be 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 == h_obj->prototype) { goto skip; } if (!DUK_HOBJECT_HAS_EXTENSIBLE(h_obj)) { goto fail_nonextensible; } for (h_curr = h_new_proto; h_curr != NULL; h_curr = h_curr->prototype) { /* 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_EXTERNAL void duk_set_prototype(duk_context *ctx, duk_idx_t index) { duk_hthread *thr = (duk_hthread *) ctx; duk_hobject *obj; duk_hobject *proto; DUK_ASSERT_CTX_VALID(ctx); obj = duk_require_hobject(ctx, index); DUK_ASSERT(obj != NULL); duk_require_type_mask(ctx, -1, DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_OBJECT); proto = duk_get_hobject(ctx, -1); /* proto can also be NULL here (allowed explicitly) */ DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, obj, proto); duk_pop(ctx); }
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; }
/* Object.defineProperty() equivalent C binding. */ DUK_EXTERNAL void duk_def_prop(duk_context *ctx, duk_idx_t obj_index, duk_uint_t flags) { duk_hthread *thr = (duk_hthread *) ctx; duk_idx_t idx_base; duk_hobject *obj; duk_hstring *key; duk_idx_t idx_value; duk_hobject *get; duk_hobject *set; duk_uint_t is_data_desc; duk_uint_t is_acc_desc; DUK_ASSERT_CTX_VALID(ctx); obj = duk_require_hobject(ctx, obj_index); is_data_desc = flags & (DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_HAVE_WRITABLE); is_acc_desc = flags & (DUK_DEFPROP_HAVE_GETTER | DUK_DEFPROP_HAVE_SETTER); if (is_data_desc && is_acc_desc) { /* "Have" flags must not be conflicting so that they would * apply to both a plain property and an accessor at the same * time. */ goto fail_invalid_desc; } idx_base = duk_get_top_index(ctx); if (flags & DUK_DEFPROP_HAVE_SETTER) { duk_require_type_mask(ctx, idx_base, DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC); set = duk_get_hobject_or_lfunc_coerce(ctx, idx_base); if (set != NULL && !DUK_HOBJECT_IS_CALLABLE(set)) { goto fail_not_callable; } idx_base--; } else { set = NULL; } if (flags & DUK_DEFPROP_HAVE_GETTER) { duk_require_type_mask(ctx, idx_base, DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC); get = duk_get_hobject_or_lfunc_coerce(ctx, idx_base); if (get != NULL && !DUK_HOBJECT_IS_CALLABLE(get)) { goto fail_not_callable; } idx_base--; } else { get = NULL; } if (flags & DUK_DEFPROP_HAVE_VALUE) { idx_value = idx_base; idx_base--; } else { idx_value = (duk_idx_t) -1; } key = duk_require_hstring(ctx, idx_base); duk_require_valid_index(ctx, idx_base); duk_hobject_define_property_helper(ctx, flags /*defprop_flags*/, obj, key, idx_value, get, set); /* Clean up stack */ duk_set_top(ctx, idx_base); /* [ ... obj ... ] */ return; fail_invalid_desc: DUK_ERROR(thr, DUK_ERR_TYPE_ERROR, DUK_STR_INVALID_DESCRIPTOR); return; fail_not_callable: DUK_ERROR(thr, DUK_ERR_TYPE_ERROR, DUK_STR_NOT_CALLABLE); return; }
static duk_ret_t duk__require(duk_context *ctx) { const char *str_req_id; /* requested identifier */ const char *str_mod_id; /* require.id of current module */ duk_int_t pcall_rc; /* NOTE: we try to minimize code size by avoiding unnecessary pops, * so the stack looks a bit cluttered in this function. DUK__ASSERT_TOP() * assertions are used to ensure stack configuration is correct at each * step. */ /* * Resolve module identifier into canonical absolute form. */ str_req_id = duk_require_string(ctx, DUK__IDX_REQUESTED_ID); duk_push_current_function(ctx); duk_get_prop_string(ctx, -1, "id"); str_mod_id = duk_get_string(ctx, DUK__IDX_REQUIRE_ID); /* ignore non-strings */ duk__resolve_module_id(ctx, str_req_id, str_mod_id); str_req_id = NULL; str_mod_id = NULL; /* [ requested_id require require.id resolved_id last_comp ] */ DUK__ASSERT_TOP(ctx, DUK__IDX_LASTCOMP + 1); /* * Cached module check. * * If module has been loaded or its loading has already begun without * finishing, return the same cached value (module.exports). The * value is registered when module load starts so that circular * references can be supported to some extent. */ duk_push_global_stash(ctx); duk_get_prop_string(ctx, -1, "\xff" "module:Duktape"); duk_remove(ctx, -2); /* Lookup stashed, original 'Duktape' object. */ duk_get_prop_string(ctx, DUK__IDX_DUKTAPE, "modLoaded"); /* Duktape.modLoaded */ duk_require_type_mask(ctx, DUK__IDX_MODLOADED, DUK_TYPE_MASK_OBJECT); DUK__ASSERT_TOP(ctx, DUK__IDX_MODLOADED + 1); duk_dup(ctx, DUK__IDX_RESOLVED_ID); if (duk_get_prop(ctx, DUK__IDX_MODLOADED)) { /* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded Duktape.modLoaded[id] ] */ duk_get_prop_string(ctx, -1, "exports"); /* return module.exports */ return 1; } DUK__ASSERT_TOP(ctx, DUK__IDX_UNDEFINED + 1); /* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined ] */ /* * Module not loaded (and loading not started previously). * * Create a new require() function with 'id' set to resolved ID * of module being loaded. Also create 'exports' and 'module' * tables but don't register exports to the loaded table yet. * We don't want to do that unless the user module search callbacks * succeeds in finding the module. */ /* Fresh require: require.id is left configurable (but not writable) * so that is not easy to accidentally tweak it, but it can still be * done with Object.defineProperty(). * * XXX: require.id could also be just made non-configurable, as there * is no practical reason to touch it (at least from Ecmascript code). */ duk_push_c_function(ctx, duk__require, 1 /*nargs*/); duk_push_string(ctx, "name"); duk_push_string(ctx, "require"); duk_def_prop(ctx, DUK__IDX_FRESH_REQUIRE, DUK_DEFPROP_HAVE_VALUE); /* not writable, not enumerable, not configurable */ duk_push_string(ctx, "id"); duk_dup(ctx, DUK__IDX_RESOLVED_ID); duk_def_prop(ctx, DUK__IDX_FRESH_REQUIRE, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_SET_CONFIGURABLE); /* a fresh require() with require.id = resolved target module id */ /* Module table: * - module.exports: initial exports table (may be replaced by user) * - module.id is non-writable and non-configurable, as the CommonJS * spec suggests this if possible * - module.filename: not set, defaults to resolved ID if not explicitly * set by modSearch() (note capitalization, not .fileName, matches Node.js) * - module.name: not set, defaults to last component of resolved ID if * not explicitly set by modSearch() */ duk_push_object(ctx); /* exports */ duk_push_object(ctx); /* module */ duk_push_string(ctx, "exports"); duk_dup(ctx, DUK__IDX_EXPORTS); duk_def_prop(ctx, DUK__IDX_MODULE, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_SET_WRITABLE | DUK_DEFPROP_SET_CONFIGURABLE); /* module.exports = exports */ duk_push_string(ctx, "id"); duk_dup(ctx, DUK__IDX_RESOLVED_ID); /* resolved id: require(id) must return this same module */ duk_def_prop(ctx, DUK__IDX_MODULE, DUK_DEFPROP_HAVE_VALUE); /* module.id = resolved_id; not writable, not enumerable, not configurable */ duk_compact(ctx, DUK__IDX_MODULE); /* module table remains registered to modLoaded, minimize its size */ DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 1); /* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module ] */ /* Register the module table early to modLoaded[] so that we can * support circular references even in modSearch(). If an error * is thrown, we'll delete the reference. */ duk_dup(ctx, DUK__IDX_RESOLVED_ID); duk_dup(ctx, DUK__IDX_MODULE); duk_put_prop(ctx, DUK__IDX_MODLOADED); /* Duktape.modLoaded[resolved_id] = module */ /* * Call user provided module search function and build the wrapped * module source code (if necessary). The module search function * can be used to implement pure Ecmacsript, pure C, and mixed * Ecmascript/C modules. * * The module search function can operate on the exports table directly * (e.g. DLL code can register values to it). It can also return a * string which is interpreted as module source code (if a non-string * is returned the module is assumed to be a pure C one). If a module * cannot be found, an error must be thrown by the user callback. * * Because Duktape.modLoaded[] already contains the module being * loaded, circular references for C modules should also work * (although expected to be quite rare). */ duk_push_string(ctx, "(function(require,exports,module){"); /* Duktape.modSearch(resolved_id, fresh_require, exports, module). */ duk_get_prop_string(ctx, DUK__IDX_DUKTAPE, "modSearch"); /* Duktape.modSearch */ duk_dup(ctx, DUK__IDX_RESOLVED_ID); duk_dup(ctx, DUK__IDX_FRESH_REQUIRE); duk_dup(ctx, DUK__IDX_EXPORTS); duk_dup(ctx, DUK__IDX_MODULE); /* [ ... Duktape.modSearch resolved_id last_comp fresh_require exports module ] */ pcall_rc = duk_pcall(ctx, 4 /*nargs*/); /* -> [ ... source ] */ DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 3); if (pcall_rc != DUK_EXEC_SUCCESS) { /* Delete entry in Duktape.modLoaded[] and rethrow. */ goto delete_rethrow; } /* If user callback did not return source code, module loading * is finished (user callback initialized exports table directly). */ if (!duk_is_string(ctx, -1)) { /* User callback did not return source code, so module loading * is finished: just update modLoaded with final module.exports * and we're done. */ goto return_exports; } /* Finish the wrapped module source. Force module.filename as the * function .fileName so it gets set for functions defined within a * module. This also ensures loggers created within the module get * the module ID (or overridden filename) as their default logger name. * (Note capitalization: .filename matches Node.js while .fileName is * used elsewhere in Duktape.) */ duk_push_string(ctx, "})"); duk_concat(ctx, 3); if (!duk_get_prop_string(ctx, DUK__IDX_MODULE, "filename")) { /* module.filename for .fileName, default to resolved ID if * not present. */ duk_pop(ctx); duk_dup(ctx, DUK__IDX_RESOLVED_ID); } pcall_rc = duk_pcompile(ctx, DUK_COMPILE_EVAL); if (pcall_rc != DUK_EXEC_SUCCESS) { goto delete_rethrow; } pcall_rc = duk_pcall(ctx, 0); /* -> eval'd function wrapper (not called yet) */ if (pcall_rc != DUK_EXEC_SUCCESS) { goto delete_rethrow; } /* Module has now evaluated to a wrapped module function. Force its * .name to match module.name (defaults to last component of resolved * ID) so that it is shown in stack traces too. Note that we must not * introduce an actual name binding into the function scope (which is * usually the case with a named function) because it would affect the * scope seen by the module and shadow accesses to globals of the same name. * This is now done by compiling the function as anonymous and then forcing * its .name without setting a "has name binding" flag. */ duk_push_string(ctx, "name"); if (!duk_get_prop_string(ctx, DUK__IDX_MODULE, "name")) { /* module.name for .name, default to last component if * not present. */ duk_pop(ctx); duk_dup(ctx, DUK__IDX_LASTCOMP); } duk_def_prop(ctx, -3, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_FORCE); /* * Call the wrapped module function. * * Use a protected call so that we can update Duktape.modLoaded[resolved_id] * even if the module throws an error. */ /* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module mod_func ] */ DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 2); duk_dup(ctx, DUK__IDX_EXPORTS); /* exports (this binding) */ duk_dup(ctx, DUK__IDX_FRESH_REQUIRE); /* fresh require (argument) */ duk_get_prop_string(ctx, DUK__IDX_MODULE, "exports"); /* relookup exports from module.exports in case it was changed by modSearch */ duk_dup(ctx, DUK__IDX_MODULE); /* module (argument) */ DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 6); /* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module mod_func exports fresh_require exports module ] */ pcall_rc = duk_pcall_method(ctx, 3 /*nargs*/); if (pcall_rc != DUK_EXEC_SUCCESS) { /* Module loading failed. Node.js will forget the module * registration so that another require() will try to load * the module again. Mimic that behavior. */ goto delete_rethrow; } /* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module result(ignored) ] */ DUK__ASSERT_TOP(ctx, DUK__IDX_MODULE + 2); /* fall through */ return_exports: duk_get_prop_string(ctx, DUK__IDX_MODULE, "exports"); duk_compact(ctx, -1); /* compact the exports table */ return 1; /* return module.exports */ delete_rethrow: duk_dup(ctx, DUK__IDX_RESOLVED_ID); duk_del_prop(ctx, DUK__IDX_MODLOADED); /* delete Duktape.modLoaded[resolved_id] */ duk_throw(ctx); /* rethrow original error */ return 0; /* not reachable */ }
void duk_to_defaultvalue(duk_context *ctx, duk_idx_t idx, duk_int_t hint) { duk_require_type_mask(ctx, idx, DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_BUFFER | DUK_TYPE_MASK_LIGHTFUNC); duk_to_primitive(ctx, idx, hint); }
//void duk_require_type_mask(duk_context *ctx, duk_idx_t index, duk_uint_t mask); void aperl_duk_require_type_mask(duk_context *ctx, duk_idx_t index, duk_uint_t mask) { duk_require_type_mask(ctx, index, mask); }
/* Shared helper to implement ES2015 Object.setPrototypeOf, * Object.prototype.__proto__ setter, and Reflect.setPrototypeOf. * * http://www.ecma-international.org/ecma-262/6.0/index.html#sec-get-object.prototype.__proto__ * http://www.ecma-international.org/ecma-262/6.0/index.html#sec-object.setprototypeof */ DUK_INTERNAL duk_ret_t duk_bi_object_setprototype_shared(duk_hthread *thr) { /* * magic = 0: __proto__ setter * magic = 1: Object.setPrototypeOf() * magic = 2: Reflect.setPrototypeOf() */ duk_hobject *h_obj; duk_hobject *h_new_proto; duk_hobject *h_curr; duk_ret_t ret_success = 1; /* retval for success path */ duk_uint_t mask; duk_int_t magic; /* Preliminaries for __proto__ and setPrototypeOf (E6 19.1.2.18 steps 1-4). */ magic = duk_get_current_magic(thr); if (magic == 0) { duk_push_this_check_object_coercible(thr); duk_insert(thr, 0); if (!duk_check_type_mask(thr, 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 { if (magic == 1) { duk_require_object_coercible(thr, 0); } else { duk_require_hobject_accept_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); } duk_require_type_mask(thr, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT); } h_new_proto = duk_get_hobject(thr, 1); /* h_new_proto may be NULL */ mask = duk_get_type_mask(thr, 0); if (mask & (DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER)) { duk_hobject *curr_proto; curr_proto = thr->builtins[(mask & DUK_TYPE_MASK_LIGHTFUNC) ? DUK_BIDX_FUNCTION_PROTOTYPE : DUK_BIDX_UINT8ARRAY_PROTOTYPE]; if (h_new_proto == curr_proto) { goto skip; } goto fail_nonextensible; } h_obj = duk_get_hobject(thr, 0); if (h_obj == NULL) { goto skip; } DUK_ASSERT(h_obj != NULL); /* [[SetPrototypeOf]] standard behavior, E6 9.1.2. */ /* TODO: implement Proxy object support here */ if (h_new_proto == DUK_HOBJECT_GET_PROTOTYPE(thr->heap, 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(thr->heap, 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(thr, 1); if (magic == 2) { duk_push_true(thr); } return ret_success; fail_nonextensible: fail_loop: if (magic != 2) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } else { duk_push_false(thr); return 1; } }