Index: src/typedarray.js |
diff --git a/src/typedarray.js b/src/typedarray.js |
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+++ b/src/typedarray.js |
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+// Copyright 2013 the V8 project authors. All rights reserved. |
+// Redistribution and use in source and binary forms, with or without |
+// modification, are permitted provided that the following conditions are |
+// met: |
+// |
+// * Redistributions of source code must retain the above copyright |
+// notice, this list of conditions and the following disclaimer. |
+// * Redistributions in binary form must reproduce the above |
+// copyright notice, this list of conditions and the following |
+// disclaimer in the documentation and/or other materials provided |
+// with the distribution. |
+// * Neither the name of Google Inc. nor the names of its |
+// contributors may be used to endorse or promote products derived |
+// from this software without specific prior written permission. |
+// |
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ |
+"use strict"; |
+ |
+var $ArrayBuffer = global.__ArrayBuffer; |
+ |
+function ArrayBufferConstructor(byteLength) { // length = 1 |
+ if (%_IsConstructCall()) { |
+ var l = TO_POSITIVE_INTEGER(byteLength); |
+ %ArrayBufferInitialize(this, l); |
+ } else { |
+ return new $ArrayBuffer(byteLength); |
+ } |
+} |
+ |
+function ArrayBufferGetByteLength() { |
+ if (!IS_ARRAYBUFFER(this)) { |
+ throw MakeTypeError('incompatible_method_receiver', |
+ ['ArrayBuffer.prototype.byteLength', this]); |
+ } |
+ return %ArrayBufferGetByteLength(this); |
+} |
+ |
+// ES6 Draft 15.13.5.5.3 |
+function ArrayBufferSlice(start, end) { |
+ if (!IS_ARRAYBUFFER(this)) { |
+ throw MakeTypeError('incompatible_method_receiver', |
+ ['ArrayBuffer.prototype.slice', this]); |
+ } |
+ |
+ var relativeStart = TO_INTEGER(start); |
+ var first; |
+ if (relativeStart < 0) { |
+ first = MathMax(this.byteLength + relativeStart, 0); |
+ } else { |
+ first = MathMin(relativeStart, this.byteLength); |
+ } |
+ var relativeEnd = IS_UNDEFINED(end) ? this.byteLength : TO_INTEGER(end); |
+ var fin; |
+ if (relativeEnd < 0) { |
+ fin = MathMax(this.byteLength + relativeEnd, 0); |
+ } else { |
+ fin = MathMin(relativeEnd, this.byteLength); |
+ } |
+ |
+ var newLen = fin - first; |
+ // TODO(dslomov): implement inheritance |
+ var result = new $ArrayBuffer(newLen); |
+ |
+ %ArrayBufferSliceImpl(this, result, first); |
+ return result; |
+} |
+ |
+ |
+ |
+// ------------------------------------------------------------------- |
+ |
+(function () { |
+ %CheckIsBootstrapping(); |
+ |
+ // Set up the Uint16Array constructor function. |
+ %SetCode($ArrayBuffer, ArrayBufferConstructor); |
+ |
+ // Set up the constructor property on the ArrayBuffer prototype object. |
+ %SetProperty($ArrayBuffer.prototype, "constructor", $ArrayBuffer, DONT_ENUM); |
+ |
+ InstallGetter($ArrayBuffer.prototype, "byteLength", ArrayBufferGetByteLength); |
+ |
+ InstallFunctions($ArrayBuffer.prototype, DONT_ENUM, $Array( |
+ "slice", ArrayBufferSlice |
+ )); |
+ |
+})(); |