Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/src/js/string-iterator.js b/src/js/string-iterator.js
new file mode 100644
index 0000000..3c331dd
--- /dev/null
+++ b/src/js/string-iterator.js
@@ -0,0 +1,102 @@
+// Copyright 2014 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 GlobalString = global.String;
+var IteratorPrototype = utils.ImportNow("IteratorPrototype");
+var iteratorSymbol = utils.ImportNow("iterator_symbol");
+var MakeTypeError;
+var stringIteratorIteratedStringSymbol =
+ utils.ImportNow("string_iterator_iterated_string_symbol");
+var stringIteratorNextIndexSymbol =
+ utils.ImportNow("string_iterator_next_index_symbol");
+var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
+
+utils.Import(function(from) {
+ MakeTypeError = from.MakeTypeError;
+});
+
+// -------------------------------------------------------------------
+
+function StringIterator() {}
+
+
+// 21.1.5.1 CreateStringIterator Abstract Operation
+function CreateStringIterator(string) {
+ var s = TO_STRING(string);
+ var iterator = new StringIterator;
+ SET_PRIVATE(iterator, stringIteratorIteratedStringSymbol, s);
+ SET_PRIVATE(iterator, stringIteratorNextIndexSymbol, 0);
+ return iterator;
+}
+
+
+// ES6 section 21.1.5.2.1 %StringIteratorPrototype%.next ( )
+function StringIteratorNext() {
+ var iterator = this;
+ var value = UNDEFINED;
+ var done = true;
+
+ if (!IS_RECEIVER(iterator) ||
+ !HAS_DEFINED_PRIVATE(iterator, stringIteratorNextIndexSymbol)) {
+ throw MakeTypeError(kIncompatibleMethodReceiver,
+ 'String Iterator.prototype.next');
+ }
+
+ var s = GET_PRIVATE(iterator, stringIteratorIteratedStringSymbol);
+ if (!IS_UNDEFINED(s)) {
+ var position = GET_PRIVATE(iterator, stringIteratorNextIndexSymbol);
+ var length = TO_UINT32(s.length);
+ if (position >= length) {
+ SET_PRIVATE(iterator, stringIteratorIteratedStringSymbol, UNDEFINED);
+ } else {
+ var first = %_StringCharCodeAt(s, position);
+ value = %_StringCharFromCode(first);
+ done = false;
+ position++;
+
+ if (first >= 0xD800 && first <= 0xDBFF && position < length) {
+ var second = %_StringCharCodeAt(s, position);
+ if (second >= 0xDC00 && second <= 0xDFFF) {
+ value += %_StringCharFromCode(second);
+ position++;
+ }
+ }
+
+ SET_PRIVATE(iterator, stringIteratorNextIndexSymbol, position);
+ }
+ }
+ return %_CreateIterResultObject(value, done);
+}
+
+
+// 21.1.3.27 String.prototype [ @@iterator ]( )
+function StringPrototypeIterator() {
+ return CreateStringIterator(this);
+}
+
+//-------------------------------------------------------------------
+
+%FunctionSetPrototype(StringIterator, {__proto__: IteratorPrototype});
+%FunctionSetInstanceClassName(StringIterator, 'String Iterator');
+
+utils.InstallFunctions(StringIterator.prototype, DONT_ENUM, [
+ 'next', StringIteratorNext
+]);
+%AddNamedProperty(StringIterator.prototype, toStringTagSymbol,
+ "String Iterator", READ_ONLY | DONT_ENUM);
+
+utils.SetFunctionName(StringPrototypeIterator, iteratorSymbol);
+%AddNamedProperty(GlobalString.prototype, iteratorSymbol,
+ StringPrototypeIterator, DONT_ENUM);
+
+})