| /* |
| * Copyright (C) 2013 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include "ArrayBuffer.h" |
| #include "ArrayBufferView.h" |
| |
| namespace JSC { |
| |
| template<typename Adaptor> |
| class GenericTypedArrayView final : public ArrayBufferView { |
| protected: |
| GenericTypedArrayView(RefPtr<ArrayBuffer>&&, unsigned byteOffset, unsigned length); |
| |
| public: |
| static Ref<GenericTypedArrayView> create(unsigned length); |
| static Ref<GenericTypedArrayView> create(const typename Adaptor::Type* array, unsigned length); |
| static Ref<GenericTypedArrayView> create(RefPtr<ArrayBuffer>&&, unsigned byteOffset, unsigned length); |
| static RefPtr<GenericTypedArrayView> tryCreate(unsigned length); |
| static RefPtr<GenericTypedArrayView> tryCreate(const typename Adaptor::Type* array, unsigned length); |
| static RefPtr<GenericTypedArrayView> tryCreate(RefPtr<ArrayBuffer>&&, unsigned byteOffset, unsigned length); |
| |
| static Ref<GenericTypedArrayView> createUninitialized(unsigned length); |
| static RefPtr<GenericTypedArrayView> tryCreateUninitialized(unsigned length); |
| |
| typename Adaptor::Type* data() const { return static_cast<typename Adaptor::Type*>(baseAddress()); } |
| |
| bool set(GenericTypedArrayView<Adaptor>* array, unsigned offset) |
| { |
| return setImpl(array, offset * sizeof(typename Adaptor::Type)); |
| } |
| |
| bool setRange(const typename Adaptor::Type* data, size_t count, unsigned offset) |
| { |
| return setRangeImpl( |
| reinterpret_cast<const char*>(data), |
| count * sizeof(typename Adaptor::Type), |
| offset * sizeof(typename Adaptor::Type)); |
| } |
| |
| bool zeroRange(unsigned offset, size_t count) |
| { |
| return zeroRangeImpl(offset * sizeof(typename Adaptor::Type), count * sizeof(typename Adaptor::Type)); |
| } |
| |
| void zeroFill() { zeroRange(0, length()); } |
| |
| unsigned length() const |
| { |
| if (isNeutered()) |
| return 0; |
| return byteLength() / sizeof(typename Adaptor::Type); |
| } |
| |
| typename Adaptor::Type item(unsigned index) const |
| { |
| ASSERT_WITH_SECURITY_IMPLICATION(index < this->length()); |
| return data()[index]; |
| } |
| |
| void set(unsigned index, double value) const |
| { |
| ASSERT_WITH_SECURITY_IMPLICATION(index < this->length()); |
| data()[index] = Adaptor::toNativeFromDouble(value); |
| } |
| |
| void setNative(unsigned index, typename Adaptor::Type value) const |
| { |
| ASSERT_WITH_SECURITY_IMPLICATION(index < this->length()); |
| data()[index] = value; |
| } |
| |
| bool getRange(typename Adaptor::Type* data, size_t count, unsigned offset) |
| { |
| return getRangeImpl( |
| reinterpret_cast<char*>(data), |
| count * sizeof(typename Adaptor::Type), |
| offset * sizeof(typename Adaptor::Type)); |
| } |
| |
| bool checkInboundData(unsigned offset, size_t count) const |
| { |
| unsigned length = this->length(); |
| return (offset <= length |
| && offset + count <= length |
| // check overflow |
| && offset + count >= offset); |
| } |
| |
| RefPtr<GenericTypedArrayView> subarray(int start) const; |
| RefPtr<GenericTypedArrayView> subarray(int start, int end) const; |
| |
| TypedArrayType getType() const override |
| { |
| return Adaptor::typeValue; |
| } |
| |
| JSArrayBufferView* wrap(ExecState*, JSGlobalObject*) override; |
| }; |
| |
| } // namespace JSC |