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1 // Copyright 2014 the V8 project authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 (function(global, utils) { | 5 (function(global, utils) { |
6 | 6 |
7 'use strict'; | 7 'use strict'; |
8 | 8 |
9 %CheckIsBootstrapping(); | 9 %CheckIsBootstrapping(); |
10 | 10 |
11 var GlobalArray = global.Array; | 11 var GlobalArray = global.Array; |
12 | 12 |
13 // ------------------------------------------------------------------- | 13 // ------------------------------------------------------------------- |
14 | 14 |
15 // Proposed for ES7 | 15 // Proposed for ES7 |
16 // https://github.com/tc39/Array.prototype.includes | 16 // https://github.com/tc39/Array.prototype.includes |
17 // 6e3b78c927aeda20b9d40e81303f9d44596cd904 | 17 // 46c7532ec8499dea3e51aeb940d09e07547ed3f5 |
18 function ArrayIncludes(searchElement, fromIndex) { | 18 function InnerArrayIncludes(searchElement, fromIndex, array, length) { |
19 var array = TO_OBJECT(this); | 19 if (length === 0) { |
20 var len = $toLength(array.length); | |
21 | |
22 if (len === 0) { | |
23 return false; | 20 return false; |
24 } | 21 } |
25 | 22 |
26 var n = $toInteger(fromIndex); | 23 var n = $toInteger(fromIndex); |
27 | 24 |
28 var k; | 25 var k; |
29 if (n >= 0) { | 26 if (n >= 0) { |
30 k = n; | 27 k = n; |
31 } else { | 28 } else { |
32 k = len + n; | 29 k = length + n; |
33 if (k < 0) { | 30 if (k < 0) { |
34 k = 0; | 31 k = 0; |
35 } | 32 } |
36 } | 33 } |
37 | 34 |
38 while (k < len) { | 35 while (k < length) { |
39 var elementK = array[k]; | 36 var elementK = array[k]; |
40 if ($sameValueZero(searchElement, elementK)) { | 37 if ($sameValueZero(searchElement, elementK)) { |
41 return true; | 38 return true; |
42 } | 39 } |
43 | 40 |
44 ++k; | 41 ++k; |
45 } | 42 } |
46 | 43 |
47 return false; | 44 return false; |
48 } | 45 } |
49 | 46 |
| 47 |
| 48 function ArrayIncludes(searchElement, fromIndex) { |
| 49 CHECK_OBJECT_COERCIBLE(this, "Array.prototype.includes"); |
| 50 |
| 51 var array = TO_OBJECT(this); |
| 52 var length = $toLength(array.length); |
| 53 |
| 54 return InnerArrayIncludes(searchElement, fromIndex, array, length); |
| 55 } |
| 56 |
| 57 |
| 58 function TypedArrayIncludes(searchElement, fromIndex) { |
| 59 if (!%_IsTypedArray(this)) throw MakeTypeError(kNotTypedArray); |
| 60 |
| 61 var length = %_TypedArrayGetLength(this); |
| 62 |
| 63 return InnerArrayIncludes(searchElement, fromIndex, this, length); |
| 64 } |
| 65 |
50 // ------------------------------------------------------------------- | 66 // ------------------------------------------------------------------- |
51 | 67 |
52 %FunctionSetLength(ArrayIncludes, 1); | 68 %FunctionSetLength(ArrayIncludes, 1); |
| 69 %FunctionSetLength(TypedArrayIncludes, 1); |
53 | 70 |
54 // Set up the non-enumerable functions on the Array prototype object. | 71 // Set up the non-enumerable function on the Array prototype object. |
55 utils.InstallFunctions(GlobalArray.prototype, DONT_ENUM, [ | 72 utils.InstallFunctions(GlobalArray.prototype, DONT_ENUM, [ |
56 "includes", ArrayIncludes | 73 "includes", ArrayIncludes |
57 ]); | 74 ]); |
58 | 75 |
| 76 // Set up the non-enumerable function on the typed array prototypes. |
| 77 // This duplicates some of the machinery in harmony-typedarray.js in order to |
| 78 // keep includes behind the separate --harmony-array-includes flag. |
| 79 // TODO(littledan): Fix the TypedArray proto chain (bug v8:4085). |
| 80 |
| 81 macro TYPED_ARRAYS(FUNCTION) |
| 82 // arrayIds below should be synchronized with Runtime_TypedArrayInitialize. |
| 83 FUNCTION(Uint8Array) |
| 84 FUNCTION(Int8Array) |
| 85 FUNCTION(Uint16Array) |
| 86 FUNCTION(Int16Array) |
| 87 FUNCTION(Uint32Array) |
| 88 FUNCTION(Int32Array) |
| 89 FUNCTION(Float32Array) |
| 90 FUNCTION(Float64Array) |
| 91 FUNCTION(Uint8ClampedArray) |
| 92 endmacro |
| 93 |
| 94 macro DECLARE_GLOBALS(NAME) |
| 95 var GlobalNAME = global.NAME; |
| 96 endmacro |
| 97 |
| 98 macro EXTEND_TYPED_ARRAY(NAME) |
| 99 // Set up non-enumerable functions on the prototype object. |
| 100 utils.InstallFunctions(GlobalNAME.prototype, DONT_ENUM, [ |
| 101 "includes", TypedArrayIncludes |
| 102 ]); |
| 103 endmacro |
| 104 |
| 105 TYPED_ARRAYS(DECLARE_GLOBALS) |
| 106 TYPED_ARRAYS(EXTEND_TYPED_ARRAY) |
| 107 |
59 }) | 108 }) |
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