7f4fa3b8f1
For the moment, we only pass the global object (the one we are setting up). A few smaller changes were necessary to avoid failures in test-object-observe/DontLeakContextOnObserve. Otherwise the global object would be retained by being context allocated, leading to test failure. R=jkummerow@chromium.org Review URL: https://codereview.chromium.org/1132513003 Cr-Commit-Position: refs/heads/master@{#28331}
97 lines
2.6 KiB
JavaScript
97 lines
2.6 KiB
JavaScript
// Copyright 2013 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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(function(global, shared, exports) {
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"use strict";
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%CheckIsBootstrapping();
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var GlobalArrayBuffer = global.ArrayBuffer;
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var GlobalObject = global.Object;
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// -------------------------------------------------------------------
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function ArrayBufferConstructor(length) { // length = 1
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if (%_IsConstructCall()) {
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var byteLength = $toPositiveInteger(length, kInvalidArrayBufferLength);
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%ArrayBufferInitialize(this, byteLength);
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} else {
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throw MakeTypeError(kConstructorNotFunction, "ArrayBuffer");
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}
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}
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function ArrayBufferGetByteLen() {
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if (!IS_ARRAYBUFFER(this)) {
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throw MakeTypeError(kIncompatibleMethodReceiver,
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'ArrayBuffer.prototype.byteLength', this);
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}
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return %_ArrayBufferGetByteLength(this);
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}
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// ES6 Draft 15.13.5.5.3
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function ArrayBufferSlice(start, end) {
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if (!IS_ARRAYBUFFER(this)) {
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throw MakeTypeError(kIncompatibleMethodReceiver,
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'ArrayBuffer.prototype.slice', this);
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}
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var relativeStart = TO_INTEGER(start);
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if (!IS_UNDEFINED(end)) {
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end = TO_INTEGER(end);
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}
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var first;
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var byte_length = %_ArrayBufferGetByteLength(this);
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if (relativeStart < 0) {
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first = $max(byte_length + relativeStart, 0);
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} else {
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first = $min(relativeStart, byte_length);
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}
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var relativeEnd = IS_UNDEFINED(end) ? byte_length : end;
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var fin;
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if (relativeEnd < 0) {
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fin = $max(byte_length + relativeEnd, 0);
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} else {
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fin = $min(relativeEnd, byte_length);
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}
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if (fin < first) {
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fin = first;
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}
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var newLen = fin - first;
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// TODO(dslomov): implement inheritance
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var result = new GlobalArrayBuffer(newLen);
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%ArrayBufferSliceImpl(this, result, first);
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return result;
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}
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function ArrayBufferIsViewJS(obj) {
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return %ArrayBufferIsView(obj);
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}
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// Set up the ArrayBuffer constructor function.
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%SetCode(GlobalArrayBuffer, ArrayBufferConstructor);
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%FunctionSetPrototype(GlobalArrayBuffer, new GlobalObject());
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// Set up the constructor property on the ArrayBuffer prototype object.
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%AddNamedProperty(
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GlobalArrayBuffer.prototype, "constructor", GlobalArrayBuffer, DONT_ENUM);
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%AddNamedProperty(GlobalArrayBuffer.prototype,
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symbolToStringTag, "ArrayBuffer", DONT_ENUM | READ_ONLY);
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$installGetter(GlobalArrayBuffer.prototype, "byteLength", ArrayBufferGetByteLen);
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$installFunctions(GlobalArrayBuffer, DONT_ENUM, [
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"isView", ArrayBufferIsViewJS
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]);
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$installFunctions(GlobalArrayBuffer.prototype, DONT_ENUM, [
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"slice", ArrayBufferSlice
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]);
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})
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