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1 // Copyright 2014 the V8 project authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 'use strict'; | |
6 | |
7 // This file relies on the fact that the following declaration has been made | |
8 // in runtime.js: | |
9 // var $Array = global.Array; | |
10 | |
11 // ------------------------------------------------------------------- | |
12 | |
13 macro TYPED_ARRAYS(FUNCTION) | |
14 // arrayIds below should be synchronized with Runtime_TypedArrayInitialize. | |
15 FUNCTION(1, Uint8Array, 1) | |
16 FUNCTION(2, Int8Array, 1) | |
17 FUNCTION(3, Uint16Array, 2) | |
18 FUNCTION(4, Int16Array, 2) | |
19 FUNCTION(5, Uint32Array, 4) | |
20 FUNCTION(6, Int32Array, 4) | |
21 FUNCTION(7, Float32Array, 4) | |
22 FUNCTION(8, Float64Array, 8) | |
23 FUNCTION(9, Uint8ClampedArray, 1) | |
24 endmacro | |
25 | |
26 | |
27 macro TYPED_ARRAY_CONSTRUCTOR(ARRAY_ID, NAME, ELEMENT_SIZE) | |
28 | |
29 // ES6 draft 08-24-14, section 22.2.3.12 | |
30 function NAMEForEach(f /* thisArg */) { // length == 1 | |
31 if (!(%_ClassOf(this) === 'NAME')) { | |
wingo
2014/09/23 18:11:25
Not sure this is right; although the function isn'
| |
32 throw MakeTypeError('incompatible_method_receiver', | |
33 ['NAME.forEach', this]); | |
34 } | |
wingo
2014/09/23 18:11:25
Also what about the text that says "A TypeError ex
| |
35 if (!IS_SPEC_FUNCTION(f)) { | |
36 throw MakeTypeError('called_non_callable', [ f ]); | |
37 } | |
38 | |
39 var length = %_TypedArrayGetLength(this); | |
40 var receiver; | |
41 | |
42 if (%_ArgumentsLength() > 1) { | |
43 receiver = %_Arguments(1); | |
44 } | |
45 | |
46 if (IS_NULL_OR_UNDEFINED(receiver)) { | |
47 receiver = %GetDefaultReceiver(f) || receiver; | |
48 } | |
49 var needs_wrapper = SHOULD_CREATE_WRAPPER(f, receiver); | |
50 | |
51 var stepping = DEBUG_IS_ACTIVE && %DebugCallbackSupportsStepping(f); | |
52 for (var i = 0; i < length; i++) { | |
53 var element = this[i]; | |
54 // Prepare break slots for debugger step in. | |
55 if (stepping) %DebugPrepareStepInIfStepping(f); | |
56 var new_receiver = needs_wrapper ? ToObject(receiver) : receiver; | |
57 %_CallFunction(new_receiver, TO_OBJECT_INLINE(element), i, this, f); | |
58 } | |
59 } | |
60 endmacro | |
61 | |
62 TYPED_ARRAYS(TYPED_ARRAY_CONSTRUCTOR) | |
63 | |
64 | |
65 function HarmonyTypedArrayExtendPrototypes() { | |
66 macro EXTEND_TYPED_ARRAY(ARRAY_ID, NAME, ELEMENT_SIZE) | |
67 %CheckIsBootstrapping(); | |
68 | |
69 // Set up non-enumerable functions on the prototype object. | |
70 InstallFunctions(global.NAME.prototype, DONT_ENUM, $Array( | |
71 "forEach", NAMEForEach | |
72 )); | |
73 endmacro | |
74 | |
75 TYPED_ARRAYS(EXTEND_TYPED_ARRAY) | |
76 } | |
77 | |
78 HarmonyTypedArrayExtendPrototypes(); | |
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