diff options
Diffstat (limited to 'Source/JavaScriptCore/wtf/ArrayBufferView.h')
| -rw-r--r-- | Source/JavaScriptCore/wtf/ArrayBufferView.h | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/Source/JavaScriptCore/wtf/ArrayBufferView.h b/Source/JavaScriptCore/wtf/ArrayBufferView.h deleted file mode 100644 index f314dd56c..000000000 --- a/Source/JavaScriptCore/wtf/ArrayBufferView.h +++ /dev/null @@ -1,201 +0,0 @@ -/* - * Copyright (C) 2009 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 COMPUTER, 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 COMPUTER, 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. - */ - -#ifndef ArrayBufferView_h -#define ArrayBufferView_h - -#include <wtf/ArrayBuffer.h> - -#include <algorithm> -#include <limits.h> -#include <wtf/PassRefPtr.h> -#include <wtf/RefCounted.h> -#include <wtf/RefPtr.h> - -namespace WTF { - -class WTF_EXPORT_PRIVATE_RTTI ArrayBufferView : public RefCounted<ArrayBufferView> { - public: - virtual bool isByteArray() const { return false; } - virtual bool isUnsignedByteArray() const { return false; } - virtual bool isUnsignedByteClampedArray() const { return false; } - virtual bool isShortArray() const { return false; } - virtual bool isUnsignedShortArray() const { return false; } - virtual bool isIntArray() const { return false; } - virtual bool isUnsignedIntArray() const { return false; } - virtual bool isFloatArray() const { return false; } - virtual bool isDoubleArray() const { return false; } - virtual bool isDataView() const { return false; } - - PassRefPtr<ArrayBuffer> buffer() const - { - return m_buffer; - } - - void* baseAddress() const - { - return m_baseAddress; - } - - unsigned byteOffset() const - { - return m_byteOffset; - } - - virtual unsigned byteLength() const = 0; - - WTF_EXPORT_PRIVATE virtual ~ArrayBufferView(); - - protected: - WTF_EXPORT_PRIVATE ArrayBufferView(PassRefPtr<ArrayBuffer>, unsigned byteOffset); - - inline bool setImpl(ArrayBufferView*, unsigned byteOffset); - - inline bool setRangeImpl(const char* data, size_t dataByteLength, unsigned byteOffset); - - inline bool zeroRangeImpl(unsigned byteOffset, size_t rangeByteLength); - - static inline void calculateOffsetAndLength(int start, int end, unsigned arraySize, - unsigned* offset, unsigned* length); - - // Helper to verify that a given sub-range of an ArrayBuffer is - // within range. - template <typename T> - static bool verifySubRange(PassRefPtr<ArrayBuffer> buffer, - unsigned byteOffset, - unsigned numElements) - { - if (!buffer) - return false; - if (sizeof(T) > 1 && byteOffset % sizeof(T)) - return false; - if (byteOffset > buffer->byteLength()) - return false; - unsigned remainingElements = (buffer->byteLength() - byteOffset) / sizeof(T); - if (numElements > remainingElements) - return false; - return true; - } - - // Input offset is in number of elements from this array's view; - // output offset is in number of bytes from the underlying buffer's view. - template <typename T> - static void clampOffsetAndNumElements(PassRefPtr<ArrayBuffer> buffer, - unsigned arrayByteOffset, - unsigned *offset, - unsigned *numElements) - { - unsigned maxOffset = (UINT_MAX - arrayByteOffset) / sizeof(T); - if (*offset > maxOffset) { - *offset = buffer->byteLength(); - *numElements = 0; - return; - } - *offset = arrayByteOffset + *offset * sizeof(T); - *offset = std::min(buffer->byteLength(), *offset); - unsigned remainingElements = (buffer->byteLength() - *offset) / sizeof(T); - *numElements = std::min(remainingElements, *numElements); - } - - WTF_EXPORT_PRIVATE virtual void neuter(); - - // This is the address of the ArrayBuffer's storage, plus the byte offset. - void* m_baseAddress; - - unsigned m_byteOffset; - - private: - friend class ArrayBuffer; - RefPtr<ArrayBuffer> m_buffer; - ArrayBufferView* m_prevView; - ArrayBufferView* m_nextView; -}; - -bool ArrayBufferView::setImpl(ArrayBufferView* array, unsigned byteOffset) -{ - if (byteOffset > byteLength() - || byteOffset + array->byteLength() > byteLength() - || byteOffset + array->byteLength() < byteOffset) { - // Out of range offset or overflow - return false; - } - - char* base = static_cast<char*>(baseAddress()); - memmove(base + byteOffset, array->baseAddress(), array->byteLength()); - return true; -} - -bool ArrayBufferView::setRangeImpl(const char* data, size_t dataByteLength, unsigned byteOffset) -{ - if (byteOffset > byteLength() - || byteOffset + dataByteLength > byteLength() - || byteOffset + dataByteLength < byteOffset) { - // Out of range offset or overflow - return false; - } - - char* base = static_cast<char*>(baseAddress()); - memmove(base + byteOffset, data, dataByteLength); - return true; -} - -bool ArrayBufferView::zeroRangeImpl(unsigned byteOffset, size_t rangeByteLength) -{ - if (byteOffset > byteLength() - || byteOffset + rangeByteLength > byteLength() - || byteOffset + rangeByteLength < byteOffset) { - // Out of range offset or overflow - return false; - } - - char* base = static_cast<char*>(baseAddress()); - memset(base + byteOffset, 0, rangeByteLength); - return true; -} - -void ArrayBufferView::calculateOffsetAndLength(int start, int end, unsigned arraySize, - unsigned* offset, unsigned* length) -{ - if (start < 0) - start += arraySize; - if (start < 0) - start = 0; - if (end < 0) - end += arraySize; - if (end < 0) - end = 0; - if (static_cast<unsigned>(end) > arraySize) - end = arraySize; - if (end < start) - end = start; - *offset = static_cast<unsigned>(start); - *length = static_cast<unsigned>(end - start); -} - -} // namespace WTF - -using WTF::ArrayBufferView; - -#endif // ArrayBufferView_h |