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// Copyright 2013 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
(function(global, utils) {
"use strict";
%CheckIsBootstrapping();
// -------------------------------------------------------------------
// Imports
var GlobalArrayBuffer = global.ArrayBuffer;
var MakeTypeError;
var MaxSimple;
var MinSimple;
var SpeciesConstructor;
utils.Import(function(from) {
MakeTypeError = from.MakeTypeError;
MaxSimple = from.MaxSimple;
MinSimple = from.MinSimple;
SpeciesConstructor = from.SpeciesConstructor;
});
// -------------------------------------------------------------------
function ArrayBufferGetByteLen() {
if (!IS_ARRAYBUFFER(this)) {
throw MakeTypeError(kIncompatibleMethodReceiver,
'ArrayBuffer.prototype.byteLength', this);
}
return %_ArrayBufferGetByteLength(this);
}
// ES6 Draft 15.13.5.5.3
function ArrayBufferSlice(start, end) {
if (!IS_ARRAYBUFFER(this)) {
throw MakeTypeError(kIncompatibleMethodReceiver,
'ArrayBuffer.prototype.slice', this);
}
var relativeStart = TO_INTEGER(start);
if (!IS_UNDEFINED(end)) {
end = TO_INTEGER(end);
}
var first;
var byte_length = %_ArrayBufferGetByteLength(this);
if (relativeStart < 0) {
first = MaxSimple(byte_length + relativeStart, 0);
} else {
first = MinSimple(relativeStart, byte_length);
}
var relativeEnd = IS_UNDEFINED(end) ? byte_length : end;
var fin;
if (relativeEnd < 0) {
fin = MaxSimple(byte_length + relativeEnd, 0);
} else {
fin = MinSimple(relativeEnd, byte_length);
}
if (fin < first) {
fin = first;
}
var newLen = fin - first;
var constructor = SpeciesConstructor(this, GlobalArrayBuffer, true);
var result = new constructor(newLen);
if (!IS_ARRAYBUFFER(result)) {
throw MakeTypeError(kIncompatibleMethodReceiver,
'ArrayBuffer.prototype.slice', result);
}
// TODO(littledan): Check for a detached ArrayBuffer
if (result === this) {
throw MakeTypeError(kArrayBufferSpeciesThis);
}
if (%_ArrayBufferGetByteLength(result) < newLen) {
throw MakeTypeError(kArrayBufferTooShort);
}
%ArrayBufferSliceImpl(this, result, first, newLen);
return result;
}
utils.InstallGetter(GlobalArrayBuffer.prototype, "byteLength",
ArrayBufferGetByteLen);
utils.InstallFunctions(GlobalArrayBuffer.prototype, DONT_ENUM, [
"slice", ArrayBufferSlice
]);
})
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