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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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() { | 5 (function() { |
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 var GlobalSymbol = global.Symbol; | 12 var GlobalSymbol = global.Symbol; |
13 | 13 |
14 // ------------------------------------------------------------------- | 14 // ------------------------------------------------------------------- |
15 | 15 |
| 16 // ES6 draft 03-17-15, section 22.1.3.3 |
| 17 function ArrayCopyWithin(target, start, end) { |
| 18 CHECK_OBJECT_COERCIBLE(this, "Array.prototype.copyWithin"); |
| 19 |
| 20 var array = TO_OBJECT_INLINE(this); |
| 21 var length = ToLength(array.length); |
| 22 |
| 23 target = TO_INTEGER(target); |
| 24 var to; |
| 25 if (target < 0) { |
| 26 to = $max(length + target, 0); |
| 27 } else { |
| 28 to = $min(target, length); |
| 29 } |
| 30 |
| 31 start = TO_INTEGER(start); |
| 32 var from; |
| 33 if (start < 0) { |
| 34 from = $max(length + start, 0); |
| 35 } else { |
| 36 from = $min(start, length); |
| 37 } |
| 38 |
| 39 end = IS_UNDEFINED(end) ? length : TO_INTEGER(end); |
| 40 var final; |
| 41 if (end < 0) { |
| 42 final = $max(length + end, 0); |
| 43 } else { |
| 44 final = $min(end, length); |
| 45 } |
| 46 |
| 47 var count = $min(final - from, length - to); |
| 48 var direction = 1; |
| 49 if (from < to && to < (from + count)) { |
| 50 direction = -1; |
| 51 from = from + count - 1; |
| 52 to = to + count - 1; |
| 53 } |
| 54 |
| 55 while (count > 0) { |
| 56 if (from in array) { |
| 57 array[to] = array[from]; |
| 58 } else { |
| 59 delete array[to]; |
| 60 } |
| 61 from = from + direction; |
| 62 to = to + direction; |
| 63 count--; |
| 64 } |
| 65 |
| 66 return array; |
| 67 } |
| 68 |
16 // ES6 draft 07-15-13, section 15.4.3.23 | 69 // ES6 draft 07-15-13, section 15.4.3.23 |
17 function ArrayFind(predicate /* thisArg */) { // length == 1 | 70 function ArrayFind(predicate /* thisArg */) { // length == 1 |
18 CHECK_OBJECT_COERCIBLE(this, "Array.prototype.find"); | 71 CHECK_OBJECT_COERCIBLE(this, "Array.prototype.find"); |
19 | 72 |
20 var array = ToObject(this); | 73 var array = ToObject(this); |
21 var length = ToInteger(array.length); | 74 var length = ToInteger(array.length); |
22 | 75 |
23 if (!IS_SPEC_FUNCTION(predicate)) { | 76 if (!IS_SPEC_FUNCTION(predicate)) { |
24 throw MakeTypeError(kCalledNonCallable, predicate); | 77 throw MakeTypeError(kCalledNonCallable, predicate); |
25 } | 78 } |
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209 return array; | 262 return array; |
210 } | 263 } |
211 | 264 |
212 // ------------------------------------------------------------------- | 265 // ------------------------------------------------------------------- |
213 | 266 |
214 InstallConstants(GlobalSymbol, [ | 267 InstallConstants(GlobalSymbol, [ |
215 // TODO(dslomov, caitp): Move to symbol.js when shipping | 268 // TODO(dslomov, caitp): Move to symbol.js when shipping |
216 "isConcatSpreadable", symbolIsConcatSpreadable | 269 "isConcatSpreadable", symbolIsConcatSpreadable |
217 ]); | 270 ]); |
218 | 271 |
| 272 %FunctionSetLength(ArrayCopyWithin, 2); |
219 %FunctionSetLength(ArrayFrom, 1); | 273 %FunctionSetLength(ArrayFrom, 1); |
220 | 274 |
221 // Set up non-enumerable functions on the Array object. | 275 // Set up non-enumerable functions on the Array object. |
222 InstallFunctions(GlobalArray, DONT_ENUM, [ | 276 InstallFunctions(GlobalArray, DONT_ENUM, [ |
223 "from", ArrayFrom, | 277 "from", ArrayFrom, |
224 "of", ArrayOf | 278 "of", ArrayOf |
225 ]); | 279 ]); |
226 | 280 |
227 // Set up the non-enumerable functions on the Array prototype object. | 281 // Set up the non-enumerable functions on the Array prototype object. |
228 InstallFunctions(GlobalArray.prototype, DONT_ENUM, [ | 282 InstallFunctions(GlobalArray.prototype, DONT_ENUM, [ |
| 283 "copyWithin", ArrayCopyWithin, |
229 "find", ArrayFind, | 284 "find", ArrayFind, |
230 "findIndex", ArrayFindIndex, | 285 "findIndex", ArrayFindIndex, |
231 "fill", ArrayFill | 286 "fill", ArrayFill |
232 ]); | 287 ]); |
233 | 288 |
234 })(); | 289 })(); |
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