/*
 *  This file is part of the KDE libraries
 *  Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 *
 */

#ifndef WTF_Vector_h
#define WTF_Vector_h

#include <wtf/Assertions.h>
#include <wtf/FastMalloc.h>
#include <wtf/Noncopyable.h>
#include <wtf/VectorTraits.h>
#include <limits>
#include <stdlib.h>
#include <cstring>
#include <utility>

// Temporary workaround for Win32.
// We should use NOMINMAX instead.
#undef max

namespace WTF
{

using std::min;
using std::max;

template <bool needsDestruction, typename T>
struct VectorDestructor;

template<typename T>
struct VectorDestructor<false, T> {
    static void destruct(T *, T *) {}
};

template<typename T>
struct VectorDestructor<true, T> {
    static void destruct(T *begin, T *end)
    {
        for (T *cur = begin; cur != end; ++cur) {
            cur->~T();
        }
    }
};

template <bool needsInitialization, bool canInitializeWithMemset, typename T>
struct VectorInitializer;

template<bool ignore, typename T>
struct VectorInitializer<false, ignore, T> {
    static void initialize(T *, T *) {}
};

template<typename T>
struct VectorInitializer<true, false, T> {
    static void initialize(T *begin, T *end)
    {
        for (T *cur = begin; cur != end; ++cur) {
            new(cur) T;
        }
    }
};

template<typename T>
struct VectorInitializer<true, true, T> {
    static void initialize(T *begin, T *end)
    {
        std::memset(begin, 0, reinterpret_cast<char *>(end) - reinterpret_cast<char *>(begin));
    }
};

template <bool canMoveWithMemcpy, typename T>
struct VectorMover;

template<typename T>
struct VectorMover<false, T> {
    static void move(const T *src, const T *srcEnd, T *dst)
    {
        while (src != srcEnd) {
            new(dst) T(*src);
            const_cast<T *>(src)->~T();
            ++dst;
            ++src;
        }
    }
    static void moveOverlapping(const T *src, const T *srcEnd, T *dst)
    {
        if (src > dst) {
            move(src, srcEnd, dst);
        } else {
            T *dstEnd = dst + (srcEnd - src);
            while (src != srcEnd) {
                --srcEnd;
                --dstEnd;
                new(dstEnd) T(*srcEnd);
                const_cast<T *>(srcEnd)->~T();
            }
        }
    }
};

template<typename T>
struct VectorMover<true, T> {
    static void move(const T *src, const T *srcEnd, T *dst)
    {
        std::memcpy(dst, src, reinterpret_cast<const char *>(srcEnd) - reinterpret_cast<const char *>(src));
    }
    static void moveOverlapping(const T *src, const T *srcEnd, T *dst)
    {
        std::memmove(dst, src, reinterpret_cast<const char *>(srcEnd) - reinterpret_cast<const char *>(src));
    }
};

template <bool canCopyWithMemcpy, typename T>
struct VectorCopier;

template<typename T>
struct VectorCopier<false, T> {
    static void uninitializedCopy(const T *src, const T *srcEnd, T *dst)
    {
        while (src != srcEnd) {
            new(dst) T(*src);
            ++dst;
            ++src;
        }
    }
};

template<typename T>
struct VectorCopier<true, T> {
    static void uninitializedCopy(const T *src, const T *srcEnd, T *dst)
    {
        std::memcpy(dst, src, reinterpret_cast<const char *>(srcEnd) - reinterpret_cast<const char *>(src));
    }
};

template <bool canFillWithMemset, typename T>
struct VectorFiller;

template<typename T>
struct VectorFiller<false, T> {
    static void uninitializedFill(T *dst, T *dstEnd, const T &val)
    {
        while (dst != dstEnd) {
            new(dst) T(val);
            ++dst;
        }
    }
};

template<typename T>
struct VectorFiller<true, T> {
    static void uninitializedFill(T *dst, T *dstEnd, const T &val)
    {
        ASSERT(sizeof(T) == sizeof(char));
        std::memset(dst, val, dstEnd - dst);
    }
};

template<bool canCompareWithMemcmp, typename T>
struct VectorComparer;

template<typename T>
struct VectorComparer<false, T> {
    static bool compare(const T *a, const T *b, size_t size)
    {
        for (size_t i = 0; i < size; ++i)
            if (a[i] != b[i]) {
                return false;
            }
        return true;
    }
};

template<typename T>
struct VectorComparer<true, T> {
    static bool compare(const T *a, const T *b, size_t size)
    {
        return std::memcmp(a, b, sizeof(T) * size) == 0;
    }
};

template<typename T>
struct VectorTypeOperations {
    static void destruct(T *begin, T *end)
    {
        VectorDestructor<VectorTraits<T>::needsDestruction, T>::destruct(begin, end);
    }

    static void initialize(T *begin, T *end)
    {
        VectorInitializer<VectorTraits<T>::needsInitialization, VectorTraits<T>::canInitializeWithMemset, T>::initialize(begin, end);
    }

    static void move(const T *src, const T *srcEnd, T *dst)
    {
        VectorMover<VectorTraits<T>::canMoveWithMemcpy, T>::move(src, srcEnd, dst);
    }

    static void moveOverlapping(const T *src, const T *srcEnd, T *dst)
    {
        VectorMover<VectorTraits<T>::canMoveWithMemcpy, T>::moveOverlapping(src, srcEnd, dst);
    }

    static void uninitializedCopy(const T *src, const T *srcEnd, T *dst)
    {
        VectorCopier<VectorTraits<T>::canCopyWithMemcpy, T>::uninitializedCopy(src, srcEnd, dst);
    }

    static void uninitializedFill(T *dst, T *dstEnd, const T &val)
    {
        VectorFiller<VectorTraits<T>::canFillWithMemset, T>::uninitializedFill(dst, dstEnd, val);
    }

    static bool compare(const T *a, const T *b, size_t size)
    {
        return VectorComparer<VectorTraits<T>::canCompareWithMemcmp, T>::compare(a, b, size);
    }
};

template<typename T>
class VectorBufferBase : Noncopyable
{
public:
    void allocateBuffer(size_t newCapacity)
    {
        m_capacity = newCapacity;
        if (newCapacity > std::numeric_limits<size_t>::max() / sizeof(T)) {
            CRASH();
        }
        m_buffer = static_cast<T *>(fastMalloc(newCapacity * sizeof(T)));
    }

    void deallocateBuffer(T *bufferToDeallocate)
    {
        if (m_buffer == bufferToDeallocate) {
            m_buffer = nullptr;
        }
        fastFree(bufferToDeallocate);
    }

    T *buffer()
    {
        return m_buffer;
    }
    const T *buffer() const
    {
        return m_buffer;
    }
    size_t capacity() const
    {
        return m_capacity;
    }

    T *releaseBuffer()
    {
        T *buffer = m_buffer;
        m_buffer = 0;
        m_capacity = 0;
        return buffer;
    }

protected:
    VectorBufferBase()
        : m_buffer(nullptr)
        , m_capacity(0)
    {
    }

    VectorBufferBase(T *buffer, size_t capacity)
        : m_buffer(buffer)
        , m_capacity(capacity)
    {
    }

    ~VectorBufferBase()
    {
        // FIXME: It would be nice to find a way to ASSERT that m_buffer hasn't leaked here.
    }

    T *m_buffer;
    size_t m_capacity;
};

template<typename T, size_t inlineCapacity>
class VectorBuffer;

template<typename T>
class VectorBuffer<T, 0> : private VectorBufferBase<T>
{
private:
    typedef VectorBufferBase<T> Base;
public:
    VectorBuffer()
    {
    }

    VectorBuffer(size_t capacity)
    {
        allocateBuffer(capacity);
    }

    ~VectorBuffer()
    {
        deallocateBuffer(buffer());
    }

    void swap(VectorBuffer<T, 0> &other)
    {
        std::swap(m_buffer, other.m_buffer);
        std::swap(m_capacity, other.m_capacity);
    }

    using Base::allocateBuffer;
    using Base::deallocateBuffer;

    using Base::buffer;
    using Base::capacity;

    using Base::releaseBuffer;
private:
    using Base::m_buffer;
    using Base::m_capacity;
};

template<typename T, size_t inlineCapacity>
class VectorBuffer : private VectorBufferBase<T>
{
private:
    typedef VectorBufferBase<T> Base;
public:
    VectorBuffer()
        : Base(inlineBuffer(), inlineCapacity)
    {
    }

    VectorBuffer(size_t capacity)
        : Base(inlineBuffer(), inlineCapacity)
    {
        allocateBuffer(capacity);
    }

    ~VectorBuffer()
    {
        deallocateBuffer(buffer());
    }

    void allocateBuffer(size_t newCapacity)
    {
        if (newCapacity > inlineCapacity) {
            Base::allocateBuffer(newCapacity);
        }
    }

    void deallocateBuffer(T *bufferToDeallocate)
    {
        if (bufferToDeallocate == inlineBuffer()) {
            return;
        }
        Base::deallocateBuffer(bufferToDeallocate);
    }

    using Base::buffer;
    using Base::capacity;

    T *releaseBuffer()
    {
        if (buffer() == inlineBuffer()) {
            return 0;
        }
        return Base::releaseBuffer();
    }

private:
    using Base::m_buffer;
    using Base::m_capacity;

    static const size_t m_inlineBufferSize = inlineCapacity *sizeof(T);
    T *inlineBuffer()
    {
        return reinterpret_cast<T *>(&m_inlineBuffer);
    }

    // FIXME: Nothing guarantees this buffer is appropriately aligned to hold objects of type T.
    char m_inlineBuffer[m_inlineBufferSize];
};

template<typename T, size_t inlineCapacity = 0>
class Vector
{
private:
    typedef VectorBuffer<T, inlineCapacity> Buffer;
    typedef VectorTypeOperations<T> TypeOperations;

public:
    typedef T ValueType;

    typedef T *iterator;
    typedef const T *const_iterator;

    Vector()
        : m_size(0)
    {
    }

    explicit Vector(size_t size)
        : m_size(size)
        , m_buffer(size)
    {
        TypeOperations::initialize(begin(), end());
    }

    ~Vector()
    {
        clear();
    }

    Vector(const Vector &);
    template<size_t otherCapacity>
    Vector(const Vector<T, otherCapacity> &);

    Vector &operator=(const Vector &);
    template<size_t otherCapacity>
    Vector &operator=(const Vector<T, otherCapacity> &);

    size_t size() const
    {
        return m_size;
    }
    size_t capacity() const
    {
        return m_buffer.capacity();
    }
    bool isEmpty() const
    {
        return !size();
    }

    T &at(size_t i)
    {
        ASSERT(i < size());
        return m_buffer.buffer()[i];
    }
    const T &at(size_t i) const
    {
        ASSERT(i < size());
        return m_buffer.buffer()[i];
    }

    T &operator[](size_t i)
    {
        return at(i);
    }
    const T &operator[](size_t i) const
    {
        return at(i);
    }

    T *data()
    {
        return m_buffer.buffer();
    }
    const T *data() const
    {
        return m_buffer.buffer();
    }

    iterator begin()
    {
        return data();
    }
    iterator end()
    {
        return begin() + m_size;
    }
    const_iterator begin() const
    {
        return data();
    }
    const_iterator end() const
    {
        return begin() + m_size;
    }

    T &first()
    {
        return at(0);
    }
    const T &first() const
    {
        return at(0);
    }
    T &last()
    {
        return at(size() - 1);
    }
    const T &last() const
    {
        return at(size() - 1);
    }

    void shrink(size_t size);
    void grow(size_t size);
    void resize(size_t size);
    void reserveCapacity(size_t newCapacity);
    void shrinkCapacity(size_t newCapacity);

    void clear()
    {
        if (m_size) {
            shrink(0);
        }
    }

    template<typename U> void append(const U *, size_t);
    template<typename U> void append(const U &);
    template<typename U> void uncheckedAppend(const U &val);
    template<typename U, size_t c> void append(const Vector<U, c> &);

    template<typename U> void insert(size_t position, const U *, size_t);
    template<typename U> void insert(size_t position, const U &);
    template<typename U, size_t c> void insert(size_t position, const Vector<U, c> &);

    template<typename U> void prepend(const U *, size_t);
    template<typename U> void prepend(const U &);
    template<typename U, size_t c> void prepend(const Vector<U, c> &);

    void remove(size_t position);
    void remove(size_t position, size_t length);

    void removeLast()
    {
        ASSERT(!isEmpty());
        shrink(size() - 1);
    }

    Vector(size_t size, const T &val)
        : m_size(size)
        , m_buffer(size)
    {
        TypeOperations::uninitializedFill(begin(), end(), val);
    }

    void fill(const T &, size_t);
    void fill(const T &val)
    {
        fill(val, size());
    }

    template<typename Iterator> void appendRange(Iterator start, Iterator end);

    T *releaseBuffer();

    void swap(Vector<T, inlineCapacity> &other)
    {
        std::swap(m_size, other.m_size);
        m_buffer.swap(other.m_buffer);
    }

private:
    void expandCapacity(size_t newMinCapacity);
    const T *expandCapacity(size_t newMinCapacity, const T *);
    template<typename U> U *expandCapacity(size_t newMinCapacity, U *);

    size_t m_size;
    Buffer m_buffer;
};

template<typename T, size_t inlineCapacity>
Vector<T, inlineCapacity>::Vector(const Vector &other)
    : m_size(other.size())
    , m_buffer(other.capacity())
{
    TypeOperations::uninitializedCopy(other.begin(), other.end(), begin());
}

template<typename T, size_t inlineCapacity>
template<size_t otherCapacity>
Vector<T, inlineCapacity>::Vector(const Vector<T, otherCapacity> &other)
    : m_size(other.size())
    , m_buffer(other.capacity())
{
    TypeOperations::uninitializedCopy(other.begin(), other.end(), begin());
}

template<typename T, size_t inlineCapacity>
Vector<T, inlineCapacity> &Vector<T, inlineCapacity>::operator=(const Vector<T, inlineCapacity> &other)
{
    if (&other == this) {
        return *this;
    }

    if (size() > other.size()) {
        shrink(other.size());
    } else if (other.size() > capacity()) {
        clear();
        reserveCapacity(other.size());
    }

    std::copy(other.begin(), other.begin() + size(), begin());
    TypeOperations::uninitializedCopy(other.begin() + size(), other.end(), end());
    m_size = other.size();

    return *this;
}

template<typename T, size_t inlineCapacity>
template<size_t otherCapacity>
Vector<T, inlineCapacity> &Vector<T, inlineCapacity>::operator=(const Vector<T, otherCapacity> &other)
{
    if (&other == this) {
        return *this;
    }

    if (size() > other.size()) {
        shrink(other.size());
    } else if (other.size() > capacity()) {
        clear();
        reserveCapacity(other.size());
    }

    std::copy(other.begin(), other.begin() + size(), begin());
    TypeOperations::uninitializedCopy(other.begin() + size(), other.end(), end());
    m_size = other.size();

    return *this;
}

template<typename T, size_t inlineCapacity>
void Vector<T, inlineCapacity>::fill(const T &val, size_t newSize)
{
    if (size() > newSize) {
        shrink(newSize);
    } else if (newSize > capacity()) {
        clear();
        reserveCapacity(newSize);
    }

    std::fill(begin(), end(), val);
    TypeOperations::uninitializedFill(end(), begin() + newSize, val);
    m_size = newSize;
}

template<typename T, size_t inlineCapacity>
template<typename Iterator>
void Vector<T, inlineCapacity>::appendRange(Iterator start, Iterator end)
{
    for (Iterator it = start; it != end; ++it) {
        append(*it);
    }
}

template<typename T, size_t inlineCapacity>
void Vector<T, inlineCapacity>::expandCapacity(size_t newMinCapacity)
{
    reserveCapacity(max(newMinCapacity, max(static_cast<size_t>(16), capacity() + capacity() / 4 + 1)));
}

template<typename T, size_t inlineCapacity>
const T *Vector<T, inlineCapacity>::expandCapacity(size_t newMinCapacity, const T *ptr)
{
    if (ptr < begin() || ptr >= end()) {
        expandCapacity(newMinCapacity);
        return ptr;
    }
    size_t index = ptr - begin();
    expandCapacity(newMinCapacity);
    return begin() + index;
}

template<typename T, size_t inlineCapacity> template<typename U>
inline U *Vector<T, inlineCapacity>::expandCapacity(size_t newMinCapacity, U *ptr)
{
    expandCapacity(newMinCapacity);
    return ptr;
}

template<typename T, size_t inlineCapacity>
void Vector<T, inlineCapacity>::resize(size_t size)
{
    if (size <= m_size) {
        TypeOperations::destruct(begin() + size, end());
    } else {
        if (size > capacity()) {
            expandCapacity(size);
        }
        if (begin()) {
            TypeOperations::initialize(end(), begin() + size);
        }
    }

    m_size = size;
}

template<typename T, size_t inlineCapacity>
void Vector<T, inlineCapacity>::shrink(size_t size)
{
    ASSERT(size <= m_size);
    TypeOperations::destruct(begin() + size, end());
    m_size = size;
}

template<typename T, size_t inlineCapacity>
void Vector<T, inlineCapacity>::grow(size_t size)
{
    ASSERT(size >= m_size);
    if (size > capacity()) {
        expandCapacity(size);
    }
    if (begin()) {
        TypeOperations::initialize(end(), begin() + size);
    }
    m_size = size;
}

template<typename T, size_t inlineCapacity>
void Vector<T, inlineCapacity>::reserveCapacity(size_t newCapacity)
{
    if (newCapacity <= capacity()) {
        return;
    }
    T *oldBuffer = begin();
    T *oldEnd = end();
    m_buffer.allocateBuffer(newCapacity);
    if (begin()) {
        TypeOperations::move(oldBuffer, oldEnd, begin());
    }
    m_buffer.deallocateBuffer(oldBuffer);
}

template<typename T, size_t inlineCapacity>
void Vector<T, inlineCapacity>::shrinkCapacity(size_t newCapacity)
{
    if (newCapacity >= capacity()) {
        return;
    }

    resize(min(m_size, newCapacity));

    T *oldBuffer = begin();
    if (newCapacity > 0) {
        T *oldEnd = end();
        m_buffer.allocateBuffer(newCapacity);
        if (begin() != oldBuffer) {
            TypeOperations::move(oldBuffer, oldEnd, begin());
        }
    }

    m_buffer.deallocateBuffer(oldBuffer);
}

// Templatizing these is better than just letting the conversion happen implicitly,
// because for instance it allows a PassRefPtr to be appended to a RefPtr vector
// without refcount thrash.

template<typename T, size_t inlineCapacity> template<typename U>
void Vector<T, inlineCapacity>::append(const U *data, size_t dataSize)
{
    size_t newSize = m_size + dataSize;
    if (newSize > capacity()) {
        data = expandCapacity(newSize, data);
        if (!begin()) {
            return;
        }
    }
    T *dest = end();
    for (size_t i = 0; i < dataSize; ++i) {
        new(&dest[i]) T(data[i]);
    }
    m_size = newSize;
}

template<typename T, size_t inlineCapacity> template<typename U>
inline void Vector<T, inlineCapacity>::append(const U &val)
{
    const U *ptr = &val;
    if (size() == capacity()) {
        ptr = expandCapacity(size() + 1, ptr);
        if (!begin()) {
            return;
        }
    }

#if COMPILER(MSVC7)
    // FIXME: MSVC7 generates compilation errors when trying to assign
    // a pointer to a Vector of its base class (i.e. can't downcast). So far
    // I've been unable to determine any logical reason for this, so I can
    // only assume it is a bug with the compiler. Casting is a bad solution,
    // however, because it subverts implicit conversions, so a better
    // one is needed.
    new(end()) T(static_cast<T>(*ptr));
#else
    new(end()) T(*ptr);
#endif
    ++m_size;
}

// This version of append saves a branch in the case where you know that the
// vector's capacity is large enough for the append to succeed.

template<typename T, size_t inlineCapacity> template<typename U>
inline void Vector<T, inlineCapacity>::uncheckedAppend(const U &val)
{
    ASSERT(size() < capacity());
    const U *ptr = &val;
    new(end()) T(*ptr);
    ++m_size;
}

template<typename T, size_t inlineCapacity> template<typename U, size_t c>
inline void Vector<T, inlineCapacity>::append(const Vector<U, c> &val)
{
    append(val.begin(), val.size());
}

template<typename T, size_t inlineCapacity> template<typename U>
void Vector<T, inlineCapacity>::insert(size_t position, const U *data, size_t dataSize)
{
    ASSERT(position <= size());
    size_t newSize = m_size + dataSize;
    if (newSize > capacity()) {
        data = expandCapacity(newSize, data);
        if (!begin()) {
            return;
        }
    }
    T *spot = begin() + position;
    TypeOperations::moveOverlapping(spot, end(), spot + dataSize);
    for (size_t i = 0; i < dataSize; ++i) {
        new(&spot[i]) T(data[i]);
    }
    m_size = newSize;
}

template<typename T, size_t inlineCapacity> template<typename U>
inline void Vector<T, inlineCapacity>::insert(size_t position, const U &val)
{
    ASSERT(position <= size());
    const U *data = &val;
    if (size() == capacity()) {
        data = expandCapacity(size() + 1, data);
        if (!begin()) {
            return;
        }
    }
    T *spot = begin() + position;
    TypeOperations::moveOverlapping(spot, end(), spot + 1);
    new(spot) T(*data);
    ++m_size;
}

template<typename T, size_t inlineCapacity> template<typename U, size_t c>
inline void Vector<T, inlineCapacity>::insert(size_t position, const Vector<U, c> &val)
{
    insert(position, val.begin(), val.size());
}

template<typename T, size_t inlineCapacity> template<typename U>
void Vector<T, inlineCapacity>::prepend(const U *data, size_t dataSize)
{
    insert(0, data, dataSize);
}

template<typename T, size_t inlineCapacity> template<typename U>
inline void Vector<T, inlineCapacity>::prepend(const U &val)
{
    insert(0, val);
}

template<typename T, size_t inlineCapacity> template<typename U, size_t c>
inline void Vector<T, inlineCapacity>::prepend(const Vector<U, c> &val)
{
    insert(0, val.begin(), val.size());
}

template<typename T, size_t inlineCapacity>
inline void Vector<T, inlineCapacity>::remove(size_t position)
{
    ASSERT(position < size());
    T *spot = begin() + position;
    spot->~T();
    TypeOperations::moveOverlapping(spot + 1, end(), spot);
    --m_size;
}

template<typename T, size_t inlineCapacity>
inline void Vector<T, inlineCapacity>::remove(size_t position, size_t length)
{
    ASSERT(position < size());
    ASSERT(position + length < size());
    T *beginSpot = begin() + position;
    T *endSpot = beginSpot + length;
    TypeOperations::destruct(beginSpot, endSpot);
    TypeOperations::moveOverlapping(endSpot, end(), beginSpot);
    m_size -= length;
}

template<typename T, size_t inlineCapacity>
inline T *Vector<T, inlineCapacity>::releaseBuffer()
{
    T *buffer = m_buffer.releaseBuffer();
    if (inlineCapacity && !buffer && m_size) {
        // If the vector had some data, but no buffer to release,
        // that means it was using the inline buffer. In that case,
        // we create a brand new buffer so the caller always gets one.
        size_t bytes = m_size * sizeof(T);
        buffer = static_cast<T *>(fastMalloc(bytes));
        memcpy(buffer, data(), bytes);
    }
    ASSERT(buffer);
    m_size = 0;
    return buffer;
}

template<typename T, size_t inlineCapacity>
void deleteAllValues(const Vector<T, inlineCapacity> &collection)
{
    typedef typename Vector<T, inlineCapacity>::const_iterator iterator;
    iterator end = collection.end();
    for (iterator it = collection.begin(); it != end; ++it) {
        delete *it;
    }
}

template<typename T, size_t inlineCapacity>
inline void swap(Vector<T, inlineCapacity> &a, Vector<T, inlineCapacity> &b)
{
    a.swap(b);
}

template<typename T, size_t inlineCapacity>
bool operator==(const Vector<T, inlineCapacity> &a, const Vector<T, inlineCapacity> &b)
{
    if (a.size() != b.size()) {
        return false;
    }

    return VectorTypeOperations<T>::compare(a.data(), b.data(), a.size());
}

template<typename T, size_t inlineCapacity>
inline bool operator!=(const Vector<T, inlineCapacity> &a, const Vector<T, inlineCapacity> &b)
{
    return !(a == b);
}

} // namespace WTF

using WTF::Vector;

#endif // WTF_Vector_h
