qvector.h

奇趣公司比较新的qt/emd版本

    } else {
        qMemSet(d->array, 0, asize * sizeof(T));
    }
}

template <typename T>
QVector<T>::QVector(int asize, const T &t)
{
    p = malloc(asize);
    d->ref.init(1);
    d->alloc = d->size = asize;
    d->sharable = true;
    d->capacity = false;
    T* i = d->array + d->size;
    while (i != d->array)
        new (--i) T(t);
}

template <typename T>
void QVector<T>::free(Data *x)
{
    if (QTypeInfo<T>::isComplex) {
        T* b = x->array;
        T* i = b + x->size;
        while (i-- != b)
             i->~T();
    }
    qFree(x);
}

template <typename T>
void QVector<T>::realloc(int asize, int aalloc)
{
    T *j, *i, *b;
    union { QVectorData *p; Data *d; } x;
    x.d = d;

    if (QTypeInfo<T>::isComplex && aalloc == d->alloc && d->ref == 1) {
        // pure resize
        i = d->array + d->size;
        j = d->array + asize;
        if (i > j) {
            while (i-- != j)
                i->~T();
        } else {
            while (j-- != i)
                new (j) T;
        }
        d->size = asize;
        return;
    }

    if (aalloc != d->alloc || d->ref != 1) {

        // (re)allocate memory
        if (QTypeInfo<T>::isStatic) {
            x.p = malloc(aalloc);
        } else if (d->ref != 1) {
            x.p = QVectorData::malloc(sizeof(Data), aalloc, sizeof(T), p);
        } else {
            if (QTypeInfo<T>::isComplex) {
                // call the destructor on all objects that need to be
                // destroyed when shrinking
                if (asize < d->size) {
                    j = d->array + asize;
                    i = d->array + d->size;
                    while (i-- != j)
                        i->~T();
                    i = d->array + asize;
                }
            }
            x.p = p = static_cast<QVectorData *>(qRealloc(p, sizeof(Data) + (aalloc - 1) * sizeof(T)));
        }
        x.d->ref.init(1);
        x.d->sharable = true;
        x.d->capacity = d->capacity;

    }
    if (QTypeInfo<T>::isComplex) {
        if (asize < d->size) {
            j = d->array + asize;
            i = x.d->array + asize;
        } else {
            // construct all new objects when growing
            i = x.d->array + asize;
            j = x.d->array + d->size;
            while (i != j)
                new (--i) T;
            j = d->array + d->size;
        }
        if (i != j) {
            // copy objects from the old array into the new array
            b = x.d->array;
            while (i != b)
                new (--i) T(*--j);
        }
    } else if (asize > d->size) {
        // initialize newly allocated memory to 0
        qMemSet(x.d->array + d->size, 0, (asize - d->size) * sizeof(T));
    }
    x.d->size = asize;
    x.d->alloc = aalloc;
    if (d != x.d) {
        x.d = qAtomicSetPtr(&d, x.d);
        if (!x.d->ref.deref())
            free(x.d);
    }
}

template<typename T>
Q_OUTOFLINE_TEMPLATE T QVector<T>::value(int i) const
{
    if (i < 0 || i >= p->size) {
        return T();
    }
    return d->array[i];
}
template<typename T>
Q_OUTOFLINE_TEMPLATE T QVector<T>::value(int i, const T &defaultValue) const
{
    return ((i < 0 || i >= p->size) ? defaultValue : d->array[i]);
}

template <typename T>
void QVector<T>::append(const T &t)
{
    if (d->ref != 1 || d->size + 1 > d->alloc) {
        const T copy(t);
        realloc(d->size, QVectorData::grow(sizeof(Data), d->size + 1, sizeof(T),
                                           QTypeInfo<T>::isStatic));
        if (QTypeInfo<T>::isComplex)
            new (d->array + d->size) T(copy);
        else
            d->array[d->size] = copy;
    } else {
        if (QTypeInfo<T>::isComplex)
            new (d->array + d->size) T(t);
        else
            d->array[d->size] = t;
    }
    ++d->size;
}

template <typename T>
Q_TYPENAME QVector<T>::iterator QVector<T>::insert(iterator before, size_type n, const T &t)
{
    int offset = before - d->array;
    if (n != 0) {
        const T copy(t);
        if (d->ref != 1 || d->size + n > d->alloc)
            realloc(d->size, QVectorData::grow(sizeof(Data), d->size + n, sizeof(T),
                                               QTypeInfo<T>::isStatic));
        if (QTypeInfo<T>::isStatic) {
            T *b = d->array + d->size;
            T *i = d->array + d->size + n;
            while (i != b)
                new (--i) T;
            i = d->array + d->size;
            T *j = i + n;
            b = d->array + offset;
            while (i != b)
                *--j = *--i;
            i = b+n;
            while (i != b)
                *--i = copy;
        } else {
            T *b = d->array + offset;
            T *i = b + n;
            memmove(i, b, (d->size - offset) * sizeof(T));
            while (i != b)
                new (--i) T(copy);
        }
        d->size += n;
    }
    return d->array + offset;
}

template <typename T>
Q_TYPENAME QVector<T>::iterator QVector<T>::erase(iterator abegin, iterator aend)
{
    int f = abegin - d->array;
    int l = aend - d->array;
    int n = l - f;
    detach();
    if (QTypeInfo<T>::isComplex) {
        qCopy(d->array+l, d->array+d->size, d->array+f);
        T *i = d->array+d->size;
        T* b = d->array+d->size-n;
        while (i != b) {
            --i;
            i->~T();
        }
    } else {
        memmove(d->array + f, d->array + l, (d->size-l)*sizeof(T));
    }
    d->size -= n;
    return d->array + f;
}

template <typename T>
bool QVector<T>::operator==(const QVector<T> &v) const
{
    if (d->size != v.d->size)
        return false;
    if (d == v.d)
        return true;
    T* b = d->array;
    T* i = b + d->size;
    T* j = v.d->array + d->size;
    while (i != b)
        if (!(*--i == *--j))
            return false;
    return true;
}

template <typename T>
QVector<T> &QVector<T>::fill(const T &from, int asize)
{
    const T copy(from);
    resize(asize < 0 ? d->size : asize);
    if (d->size) {
        T *i = d->array + d->size;
        T *b = d->array;
        while (i != b)
            *--i = copy;
    }
    return *this;
}

template <typename T>
QVector<T> &QVector<T>::operator+=(const QVector &l)
{
    int newSize = d->size + l.d->size;
    realloc(d->size, newSize);

    T *w = d->array + newSize;
    T *i = l.d->array + l.d->size;
    T *b = l.d->array;
    while (i != b) {
        if (QTypeInfo<T>::isComplex)
            new (--w) T(*--i);
        else
            *--w = *--i;
    }
    d->size = newSize;
    return *this;
}

template <typename T>
int QVector<T>::indexOf(const T &t, int from) const
{
    if (from < 0)
        from = qMax(from + d->size, 0);
    if (from < d->size) {
        T* n = d->array + from - 1;
        T* e = d->array + d->size;
        while (++n != e)
            if (*n == t)
                return n - d->array;
    }
    return -1;
}

template <typename T>
int QVector<T>::lastIndexOf(const T &t, int from) const
{
    if (from < 0)
        from += d->size;
    else if (from >= d->size)
        from = d->size-1;
    if (from >= 0) {
        T* b = d->array;
        T* n = d->array + from + 1;
        while (n != b) {
            if (*--n == t)
                return n - b;
        }
    }
    return -1;
}

template <typename T>
bool QVector<T>::contains(const T &t) const
{
    T* b = d->array;
    T* i = d->array + d->size;
    while (i != b)
        if (*--i == t)
            return true;
    return false;
}

template <typename T>
int QVector<T>::count(const T &t) const
{
    int c = 0;
    T* b = d->array;
    T* i = d->array + d->size;
    while (i != b)
        if (*--i == t)
            ++c;
    return c;
}

template <typename T>
Q_OUTOFLINE_TEMPLATE QVector<T> QVector<T>::mid(int pos, int length) const
{
    if (length < 0)
        length = size() - pos;
    if (pos == 0 && length == size())
        return *this;
    QVector<T> copy;
    if (pos + length > size())
        length = size() - pos;
    for (int i = pos; i < pos + length; ++i)
        copy += at(i);
    return copy;
}

template <typename T>
Q_OUTOFLINE_TEMPLATE QList<T> QVector<T>::toList() const
{
    QList<T> result;
    for (int i = 0; i < size(); ++i)
        result.append(at(i));
    return result;
}

template <typename T>
Q_OUTOFLINE_TEMPLATE QVector<T> QList<T>::toVector() const
{
    QVector<T> result(size());
    for (int i = 0; i < size(); ++i)
        result[i] = at(i);
    return result;
}

template <typename T>
QVector<T> QVector<T>::fromList(const QList<T> &list)
{
    return list.toVector();
}

template <typename T>
QList<T> QList<T>::fromVector(const QVector<T> &vector)
{
    return vector.toList();
}

Q_DECLARE_SEQUENTIAL_ITERATOR(Vector)
Q_DECLARE_MUTABLE_SEQUENTIAL_ITERATOR(Vector)

/*
   ### Qt 5:
   ### This needs to be removed for next releases of Qt. It is a workaround for vc++ because
   ### Qt exports QPolygon and QPolygonF that inherit QVector<QPoint> and
   ### QVector<QPointF> respectively.
*/
#ifdef Q_CC_MSVC
#include <QtCore/QPointF>
#include <QtCore/QPoint>
#if defined(QT_BUILD_CORE_LIB)
#define Q_TEMPLATE_EXTERN
#else
#define Q_TEMPLATE_EXTERN extern
#endif
# pragma warning(push)          /* MSVC 6.0 doesn't care about the disabling in qglobal.h (why?), so do it here */
# pragma warning(disable: 4231) /* nonstandard extension used : 'extern' before template explicit instantiation */
Q_TEMPLATE_EXTERN template class Q_CORE_EXPORT QVector<QPointF>;
Q_TEMPLATE_EXTERN template class Q_CORE_EXPORT QVector<QPoint>;
# pragma warning(pop)
#endif

QT_END_HEADER

#endif // QVECTOR_H