Move WTF classes related to typed arrays to wtf/typed_arrays

third_party/WebKit/Source/wtf/ArrayBuffer.h

-/*
- * 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 ArrayBuffer_h
-#define ArrayBuffer_h
-
-#include "wtf/ArrayBufferContents.h"
-#include "wtf/HashSet.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/WTFExport.h"
-
-namespace WTF {
-
-class ArrayBuffer;
-class ArrayBufferView;
-
-class WTF_EXPORT ArrayBuffer : public RefCounted<ArrayBuffer> {
-public:
-    static inline PassRefPtr<ArrayBuffer> create(unsigned numElements, unsigned elementByteSize);
-    static inline PassRefPtr<ArrayBuffer> create(ArrayBuffer*);
-    static inline PassRefPtr<ArrayBuffer> create(const void* source, unsigned byteLength);
-    static inline PassRefPtr<ArrayBuffer> create(ArrayBufferContents&);
-
-    static inline PassRefPtr<ArrayBuffer> createOrNull(unsigned numElements, unsigned elementByteSize);
-
-    // Only for use by XMLHttpRequest::responseArrayBuffer and Internals::serializeObject
-    // (through DOMArrayBuffer::createUninitialized).
-    static inline PassRefPtr<ArrayBuffer> createUninitialized(unsigned numElements, unsigned elementByteSize);
-
-    static inline PassRefPtr<ArrayBuffer> createShared(unsigned numElements, unsigned elementByteSize);
-    static inline PassRefPtr<ArrayBuffer> createShared(const void* source, unsigned byteLength);
-
-    inline void* data();
-    inline const void* data() const;
-    inline unsigned byteLength() const;
-
-    // Creates a new ArrayBuffer object with copy of bytes in this object
-    // ranging from |begin| upto but not including |end|.
-    inline PassRefPtr<ArrayBuffer> slice(int begin, int end) const;
-    inline PassRefPtr<ArrayBuffer> slice(int begin) const;
-
-    void addView(ArrayBufferView*);
-    void removeView(ArrayBufferView*);
-
-    bool transfer(ArrayBufferContents&);
-    bool shareContentsWith(ArrayBufferContents&);
-    bool isNeutered() const { return m_isNeutered; }
-    bool isShared() const { return m_contents.isShared(); }
-
-    ~ArrayBuffer() { }
-
-protected:
-    inline explicit ArrayBuffer(ArrayBufferContents&);
-
-private:
-    static inline PassRefPtr<ArrayBuffer> create(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy);
-    static inline PassRefPtr<ArrayBuffer> createOrNull(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy);
-    static inline PassRefPtr<ArrayBuffer> createShared(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy);
-
-    inline PassRefPtr<ArrayBuffer> sliceImpl(unsigned begin, unsigned end) const;
-    inline unsigned clampIndex(int index) const;
-    static inline int clampValue(int x, int left, int right);
-
-    ArrayBufferContents m_contents;
-    ArrayBufferView* m_firstView;
-    bool m_isNeutered;
-};
-
-int ArrayBuffer::clampValue(int x, int left, int right)
-{
-    ASSERT(left <= right);
-    if (x < left)
-        x = left;
-    if (right < x)
-        x = right;
-    return x;
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::create(unsigned numElements, unsigned elementByteSize)
-{
-    return create(numElements, elementByteSize, ArrayBufferContents::ZeroInitialize);
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::create(ArrayBuffer* other)
-{
-    // TODO(binji): support creating a SharedArrayBuffer by copying another ArrayBuffer?
-    ASSERT(!other->isShared());
-    return ArrayBuffer::create(other->data(), other->byteLength());
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::create(const void* source, unsigned byteLength)
-{
-    ArrayBufferContents contents(byteLength, 1, ArrayBufferContents::NotShared, ArrayBufferContents::ZeroInitialize);
-    RELEASE_ASSERT(contents.data());
-    RefPtr<ArrayBuffer> buffer = adoptRef(new ArrayBuffer(contents));
-    memcpy(buffer->data(), source, byteLength);
-    return buffer.release();
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::create(ArrayBufferContents& contents)
-{
-    RELEASE_ASSERT(contents.data());
-    return adoptRef(new ArrayBuffer(contents));
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::createOrNull(unsigned numElements, unsigned elementByteSize)
-{
-    return createOrNull(numElements, elementByteSize, ArrayBufferContents::ZeroInitialize);
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::createUninitialized(unsigned numElements, unsigned elementByteSize)
-{
-    return create(numElements, elementByteSize, ArrayBufferContents::DontInitialize);
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::create(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy policy)
-{
-    ArrayBufferContents contents(numElements, elementByteSize, ArrayBufferContents::NotShared, policy);
-    RELEASE_ASSERT(contents.data());
-    return adoptRef(new ArrayBuffer(contents));
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::createOrNull(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy policy)
-{
-    ArrayBufferContents contents(numElements, elementByteSize, ArrayBufferContents::NotShared, policy);
-    if (!contents.data())
-        return nullptr;
-    return adoptRef(new ArrayBuffer(contents));
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::createShared(unsigned numElements, unsigned elementByteSize)
-{
-    return createShared(numElements, elementByteSize, ArrayBufferContents::ZeroInitialize);
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::createShared(const void* source, unsigned byteLength)
-{
-    ArrayBufferContents contents(byteLength, 1, ArrayBufferContents::Shared, ArrayBufferContents::ZeroInitialize);
-    RELEASE_ASSERT(contents.data());
-    RefPtr<ArrayBuffer> buffer = adoptRef(new ArrayBuffer(contents));
-    memcpy(buffer->data(), source, byteLength);
-    return buffer.release();
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::createShared(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy policy)
-{
-    ArrayBufferContents contents(numElements, elementByteSize, ArrayBufferContents::Shared, policy);
-    RELEASE_ASSERT(contents.data());
-    return adoptRef(new ArrayBuffer(contents));
-}
-
-ArrayBuffer::ArrayBuffer(ArrayBufferContents& contents)
-    : m_firstView(0), m_isNeutered(false)
-{
-    if (contents.isShared())
-        contents.shareWith(m_contents);
-    else
-        contents.transfer(m_contents);
-}
-
-void* ArrayBuffer::data()
-{
-    return m_contents.data();
-}
-
-const void* ArrayBuffer::data() const
-{
-    return m_contents.data();
-}
-
-unsigned ArrayBuffer::byteLength() const
-{
-    return m_contents.sizeInBytes();
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::slice(int begin, int end) const
-{
-    return sliceImpl(clampIndex(begin), clampIndex(end));
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::slice(int begin) const
-{
-    return sliceImpl(clampIndex(begin), byteLength());
-}
-
-PassRefPtr<ArrayBuffer> ArrayBuffer::sliceImpl(unsigned begin, unsigned end) const
-{
-    unsigned size = begin <= end ? end - begin : 0;
-    return ArrayBuffer::create(static_cast<const char*>(data()) + begin, size);
-}
-
-unsigned ArrayBuffer::clampIndex(int index) const
-{
-    unsigned currentLength = byteLength();
-    if (index < 0)
-        index = currentLength + index;
-    return clampValue(index, 0, currentLength);
-}
-
-} // namespace WTF
-
-using WTF::ArrayBuffer;
-
-#endif // ArrayBuffer_h