runtime/JSArrayIterator.cpp

   1 /*
   2  * Copyright (C) 2013 Apple, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "JSArrayIterator.h"
  28
  29 #include "JSCJSValueInlines.h"
  30 #include "JSCellInlines.h"
  31 #include "SlotVisitorInlines.h"
  32 #include "StructureInlines.h"
  33
  34 namespace JSC {
  35
  36 const ClassInfo JSArrayIterator::s_info = { "Array Iterator", &Base::s_info, 0, CREATE_METHOD_TABLE(JSArrayIterator) };
  37
  38 void JSArrayIterator::finishCreation(VM& vm, JSGlobalObject*, ArrayIterationKind kind, JSObject* iteratedObject)
  39 {
  40     Base::finishCreation(vm);
  41     ASSERT(inherits(info()));
  42
  43     putDirect(vm, vm.propertyNames->iteratedObjectPrivateName, iteratedObject);
  44     putDirect(vm, vm.propertyNames->arrayIteratorNextIndexPrivateName, jsNumber(0));
  45     putDirect(vm, vm.propertyNames->arrayIterationKindPrivateName, jsNumber(kind));
  46 }
  47
  48 ArrayIterationKind JSArrayIterator::kind(ExecState* exec) const
  49 {
  50     JSValue kindValue = getDirect(exec->vm(), exec->vm().propertyNames->arrayIterationKindPrivateName);
  51     return static_cast<ArrayIterationKind>(kindValue.asInt32());
  52 }
  53
  54 JSValue JSArrayIterator::iteratedValue(ExecState* exec) const
  55 {
  56     return getDirect(exec->vm(), exec->vm().propertyNames->iteratedObjectPrivateName);
  57 }
  58
  59 JSArrayIterator* JSArrayIterator::clone(ExecState* exec)
  60 {
  61     VM& vm = exec->vm();
  62     JSValue iteratedObject = getDirect(vm, vm.propertyNames->iteratedObjectPrivateName);
  63     JSValue nextIndex = getDirect(vm, vm.propertyNames->arrayIteratorNextIndexPrivateName);
  64
  65     auto clone = JSArrayIterator::create(exec, exec->callee()->globalObject()->arrayIteratorStructure(), kind(exec), asObject(iteratedObject));
  66     clone->putDirect(vm, vm.propertyNames->arrayIteratorNextIndexPrivateName, nextIndex);
  67     return clone;
  68 }
  69
  70 }