| | 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 | #ifndef JSArgumentsIterator_h |
| | 27 | #define JSArgumentsIterator_h |
| | 28 | |
| | 29 | #include "Arguments.h" |
| | 30 | |
| | 31 | namespace JSC { |
| | 32 | |
| | 33 | class JSArgumentsIterator : public JSNonFinalObject { |
| | 34 | public: |
| | 35 | typedef JSNonFinalObject Base; |
| | 36 | |
| | 37 | DECLARE_EXPORT_INFO; |
| | 38 | |
| | 39 | static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype) |
| | 40 | { |
| | 41 | return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info()); |
| | 42 | } |
| | 43 | |
| | 44 | static JSArgumentsIterator* create(VM& vm, Structure* structure, Arguments* arguments) |
| | 45 | { |
| | 46 | JSArgumentsIterator* instance = new (NotNull, allocateCell<JSArgumentsIterator>(vm.heap)) JSArgumentsIterator(vm, structure); |
| | 47 | instance->finishCreation(vm, arguments); |
| | 48 | return instance; |
| | 49 | } |
| | 50 | |
| | 51 | bool next(CallFrame* callFrame, JSValue& value) |
| | 52 | { |
| | 53 | if (m_nextIndex >= m_arguments->length(callFrame)) |
| | 54 | return false; |
| | 55 | value = m_arguments->tryGetArgument(m_nextIndex++); |
| | 56 | if (!value) |
| | 57 | value = jsUndefined(); |
| | 58 | return true; |
| | 59 | } |
| | 60 | |
| | 61 | private: |
| | 62 | |
| | 63 | static const unsigned StructureFlags = Base::StructureFlags; |
| | 64 | |
| | 65 | JSArgumentsIterator(VM& vm, Structure* structure) |
| | 66 | : Base(vm, structure) |
| | 67 | , m_nextIndex(0) |
| | 68 | { |
| | 69 | } |
| | 70 | |
| | 71 | void finishCreation(VM&, Arguments*); |
| | 72 | |
| | 73 | WriteBarrier<Arguments> m_arguments; |
| | 74 | size_t m_nextIndex; |
| | 75 | }; |
| | 76 | |
| | 77 | } |
| | 78 | |
| | 79 | #endif // !defined(JSArgumentsIterator_h) |
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