OLD | NEW |
(Empty) | |
| 1 // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are |
| 4 // met: |
| 5 // |
| 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided |
| 11 // with the distribution. |
| 12 // * Neither the name of Google Inc. nor the names of its |
| 13 // contributors may be used to endorse or promote products derived |
| 14 // from this software without specific prior written permission. |
| 15 // |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 |
| 28 "use strict"; |
| 29 |
| 30 var $ArrayBuffer = global.__ArrayBuffer; |
| 31 |
| 32 function ArrayBufferConstructor(byteLength) { // length = 1 |
| 33 if (%_IsConstructCall()) { |
| 34 var l = TO_POSITIVE_INTEGER(byteLength); |
| 35 %ArrayBufferInitialize(this, l); |
| 36 } else { |
| 37 return new $ArrayBuffer(byteLength); |
| 38 } |
| 39 } |
| 40 |
| 41 function ArrayBufferGetByteLength() { |
| 42 if (!IS_ARRAYBUFFER(this)) { |
| 43 throw MakeTypeError('incompatible_method_receiver', |
| 44 ['ArrayBuffer.prototype.byteLength', this]); |
| 45 } |
| 46 return %ArrayBufferGetByteLength(this); |
| 47 } |
| 48 |
| 49 // ES6 Draft 15.13.5.5.3 |
| 50 function ArrayBufferSlice(start, end) { |
| 51 if (!IS_ARRAYBUFFER(this)) { |
| 52 throw MakeTypeError('incompatible_method_receiver', |
| 53 ['ArrayBuffer.prototype.slice', this]); |
| 54 } |
| 55 |
| 56 var relativeStart = TO_INTEGER(start); |
| 57 var first; |
| 58 if (relativeStart < 0) { |
| 59 first = MathMax(this.byteLength + relativeStart, 0); |
| 60 } else { |
| 61 first = MathMin(relativeStart, this.byteLength); |
| 62 } |
| 63 var relativeEnd = IS_UNDEFINED(end) ? this.byteLength : TO_INTEGER(end); |
| 64 var fin; |
| 65 if (relativeEnd < 0) { |
| 66 fin = MathMax(this.byteLength + relativeEnd, 0); |
| 67 } else { |
| 68 fin = MathMin(relativeEnd, this.byteLength); |
| 69 } |
| 70 |
| 71 var newLen = fin - first; |
| 72 // TODO(dslomov): implement inheritance |
| 73 var result = new $ArrayBuffer(newLen); |
| 74 |
| 75 %ArrayBufferSliceImpl(this, result, first); |
| 76 return result; |
| 77 } |
| 78 |
| 79 |
| 80 |
| 81 // ------------------------------------------------------------------- |
| 82 |
| 83 (function () { |
| 84 %CheckIsBootstrapping(); |
| 85 |
| 86 // Set up the Uint16Array constructor function. |
| 87 %SetCode($ArrayBuffer, ArrayBufferConstructor); |
| 88 |
| 89 // Set up the constructor property on the ArrayBuffer prototype object. |
| 90 %SetProperty($ArrayBuffer.prototype, "constructor", $ArrayBuffer, DONT_ENUM); |
| 91 |
| 92 InstallGetter($ArrayBuffer.prototype, "byteLength", ArrayBufferGetByteLength); |
| 93 |
| 94 InstallFunctions($ArrayBuffer.prototype, DONT_ENUM, $Array( |
| 95 "slice", ArrayBufferSlice |
| 96 )); |
| 97 |
| 98 })(); |
OLD | NEW |