storage.hpp

CGAL is a collaborative effort of several sites in Europe and Israel. The goal is to make the most i

        const_reference operator [] (size_type i) const {
            BOOST_UBLAS_CHECK (i < size_, bad_index ());
            return data_ [i];
        }
        BOOST_UBLAS_INLINE
        reference operator [] (size_type i) {
            BOOST_UBLAS_CHECK (i < size_, bad_index ());
            return data_ [i];
        }

        // Assignment
        BOOST_UBLAS_INLINE
        bounded_array &operator = (const bounded_array &a) {
            if (this != &a) {
                resize (a.size_);
                std::copy (a.data_, a.data_ + a.size_, data_);
            }
            return *this;
        }
        BOOST_UBLAS_INLINE
        bounded_array &assign_temporary (bounded_array &a) { 
            *this = a;
            return *this;
        }

        // Swapping
        BOOST_UBLAS_INLINE
        void swap (bounded_array &a) {
            if (this != &a) {
                std::swap (size_, a.size_);
                std::swap_ranges (data_, data_ + (std::max) (size_, a.size_), a.data_);
            }
        }
#ifndef BOOST_UBLAS_NO_MEMBER_FRIENDS
        BOOST_UBLAS_INLINE
        friend void swap (bounded_array &a1, bounded_array &a2) {
            a1.swap (a2);
        }
#endif

        BOOST_UBLAS_INLINE
        const_iterator begin () const {
            return data_;
        }
        BOOST_UBLAS_INLINE
        const_iterator end () const {
            return data_ + size_;
        }

        BOOST_UBLAS_INLINE
        iterator begin () {
            return data_;
        }
        BOOST_UBLAS_INLINE
        iterator end () {
            return data_ + size_;
        }

        // Reverse iterators

#ifdef BOOST_MSVC_STD_ITERATOR
        typedef std::reverse_iterator<const_iterator, value_type, const_reference> const_reverse_iterator;
#else
        typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
#endif

        BOOST_UBLAS_INLINE
        const_reverse_iterator rbegin () const {
            return const_reverse_iterator (end ());
        }
        BOOST_UBLAS_INLINE
        const_reverse_iterator rend () const {
            return const_reverse_iterator (begin ());
        }

#ifdef BOOST_MSVC_STD_ITERATOR
        typedef std::reverse_iterator<iterator, value_type, reference> reverse_iterator;
#else
        typedef std::reverse_iterator<iterator> reverse_iterator;
#endif

        BOOST_UBLAS_INLINE
        reverse_iterator rbegin () {
            return reverse_iterator (end ());
        }
        BOOST_UBLAS_INLINE
        reverse_iterator rend () {
            return reverse_iterator (begin ());
        }

    private:
        size_type size_;
        BOOST_UBLAS_BOUNDED_ARRAY_ALIGN value_type data_ [N];
    };


    // Array adaptor with normal deep copy semantics of elements
    template<class T>
    class array_adaptor:
        public storage_array<array_adaptor<T> > {
    public:
        typedef std::size_t size_type;
        typedef std::ptrdiff_t difference_type;
        typedef T value_type;
        typedef const T &const_reference;
        typedef T &reference;
        typedef const T *const_pointer;
        typedef T *pointer;
    private:
        typedef array_adaptor<T> self_type;

    public:
        // Construction and destruction
        BOOST_UBLAS_INLINE
        array_adaptor ():
            size_ (0), own_ (true), data_ (new value_type [0]) {
        }
        explicit BOOST_UBLAS_INLINE
        array_adaptor (size_type size):
            size_ (size), own_ (true), data_ (new value_type [size]) {
        }
        BOOST_UBLAS_INLINE
        array_adaptor (size_type size, const value_type &init):
            size_ (size), own_ (true), data_ (new value_type [size]) {
            std::fill (data_, data_ + size_, init);
        }
        BOOST_UBLAS_INLINE
        array_adaptor (size_type size, pointer data):
            size_ (size), own_ (false), data_ (data) {}
        BOOST_UBLAS_INLINE
        array_adaptor (const array_adaptor &a):
            storage_array<self_type> (),
            size_ (a.size_), own_ (true), data_ (new value_type [a.size_]) {
            *this = a;
        }
        BOOST_UBLAS_INLINE
        ~array_adaptor () {
            if (own_) {
                delete [] data_;
            }
        }

        // Resizing
    private:
        BOOST_UBLAS_INLINE
        void resize_internal (size_type size, value_type init, bool preserve = true) {
           if (size != size_) {
                pointer data = new value_type [size];
                if (preserve) {
                    std::copy (data_, data_ + (std::min) (size, size_), data);
                    std::fill (data + (std::min) (size, size_), data + size, init);
                }
                if (own_)
                    delete [] data_;
                size_ = size;
                own_ = true;
                data_ = data;
            }
        }
        BOOST_UBLAS_INLINE
        void resize_internal (size_type size, pointer data, value_type init, bool preserve = true) {
            if (data != data_) {
                if (preserve) {
                    std::copy (data_, data_ + (std::min) (size, size_), data);
                    std::fill (data + (std::min) (size, size_), data + size, value_type (0));
                }
                if (own_)
                    delete [] data_;
                own_ = false;
                data_ = data;
            }
            else {
                std::fill (data + (std::min) (size, size_), data + size, value_type (0));
            }
            size_ = size;
        }
    public:
        BOOST_UBLAS_INLINE
        void resize (size_type size) {
            resize_internal (size, value_type (), false);
        }
        BOOST_UBLAS_INLINE
        void resize (size_type size, value_type init) {
            resize_internal (size, init, true);
        }
        BOOST_UBLAS_INLINE
        void resize (size_type size, pointer data) {
            resize_internal (size, data, value_type (), false);
        }
        BOOST_UBLAS_INLINE
        void resize (size_type size, pointer data, value_type init) {
            resize_internal (size, data, init, true);
        }

        BOOST_UBLAS_INLINE
        size_type size () const {
            return size_;
        }

        // Element access
        BOOST_UBLAS_INLINE
        const_reference operator [] (size_type i) const {
            BOOST_UBLAS_CHECK (i < size_, bad_index ());
            return data_ [i];
        }
        BOOST_UBLAS_INLINE
        reference operator [] (size_type i) {
            BOOST_UBLAS_CHECK (i < size_, bad_index ());
            return data_ [i];
        }

        // Assignment
        BOOST_UBLAS_INLINE
        array_adaptor &operator = (const array_adaptor &a) {
            if (this != &a) {
                resize (a.size_);
                std::copy (a.data_, a.data_ + a.size_, data_);
            }
            return *this;
        }
        BOOST_UBLAS_INLINE
        array_adaptor &assign_temporary (array_adaptor &a) {
            if (own_ && a.own_)
                swap (a);
            else
                *this = a;
            return *this;
        }

        // Swapping
        BOOST_UBLAS_INLINE
        void swap (array_adaptor &a) {
            if (this != &a) {
                std::swap (size_, a.size_);
                std::swap (own_, a.own_);
                std::swap (data_, a.data_);
            }
        }
#ifndef BOOST_UBLAS_NO_MEMBER_FRIENDS
        BOOST_UBLAS_INLINE
        friend void swap (array_adaptor &a1, array_adaptor &a2) {
            a1.swap (a2);
        }
#endif

        // Iterators simply are pointers.

        typedef const_pointer const_iterator;

        BOOST_UBLAS_INLINE
        const_iterator begin () const {
            return data_;
        }
        BOOST_UBLAS_INLINE
        const_iterator end () const {
            return data_ + size_;
        }

        typedef pointer iterator;

        BOOST_UBLAS_INLINE
        iterator begin () {
            return data_;
        }
        BOOST_UBLAS_INLINE
        iterator end () {
            return data_ + size_;
        }

        // Reverse iterators

#ifdef BOOST_MSVC_STD_ITERATOR
        typedef std::reverse_iterator<const_iterator, value_type, const_reference> const_reverse_iterator;
#else
        typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
#endif

        BOOST_UBLAS_INLINE
        const_reverse_iterator rbegin () const {
            return const_reverse_iterator (end ());
        }
        BOOST_UBLAS_INLINE
        const_reverse_iterator rend () const {
            return const_reverse_iterator (begin ());
        }

#ifdef BOOST_MSVC_STD_ITERATOR
        typedef std::reverse_iterator<iterator, value_type, reference> reverse_iterator;
#else
        typedef std::reverse_iterator<iterator> reverse_iterator;
#endif

        BOOST_UBLAS_INLINE
        reverse_iterator rbegin () {
            return reverse_iterator (end ());
        }
        BOOST_UBLAS_INLINE
        reverse_iterator rend () {
            return reverse_iterator (begin ());
        }

    private:
        size_type size_;
        bool own_;
        pointer data_;
    };

#ifdef BOOST_UBLAS_SHALLOW_ARRAY_ADAPTOR
    // Array adaptor with shallow (reference) copy semantics of elements.
    // shared_array are used maitain reference counting.
    // This class breaks the normal copy semantics for a storage container and is very dangerous!
    template<class T>
    class shallow_array_adaptor:
        public storage_array<shallow_array_adaptor<T> > {

        template<class T>
        struct leaker {
            typedef void result_type;
            typedef T *argument_type;

            BOOST_UBLAS_INLINE
            result_type operator () (argument_type x) {}
        };
    public:
        typedef std::size_t size_type;
        typedef std::ptrdiff_t difference_type;
        typedef T value_type;
        typedef const T &const_reference;
        typedef T &reference;
        typedef const T *const_pointer;
        typedef T *pointer;
    private:
        typedef shallow_array_adaptor<T> self_type;

    public:
        // Construction and destruction
        BOOST_UBLAS_INLINE
        shallow_array_adaptor ():
            size_ (0), own_ (true), data_ (new value_type [0]) {
        }
        explicit BOOST_UBLAS_INLINE
        shallow_array_adaptor (size_type size):
            size_ (size), own_ (true), data_ (new value_type [size]) {
        }
        BOOST_UBLAS_INLINE
        shallow_array_adaptor (size_type size, const value_type &init):
            size_ (size), own_ (true), data_ (new value_type [size]) {
            std::fill (data_.get (), data_.get () + size_, init);
        }
        BOOST_UBLAS_INLINE
        shallow_array_adaptor (size_type size, pointer data):
            size_ (size), own_ (false), data_ (data, leaker<value_type> ()) {}

        BOOST_UBLAS_INLINE
        shallow_array_adaptor (const shallow_array_adaptor &a):
            storage_array<self_type> (),
            size_ (a.size_), own_ (a.own_), data_ (a.data_) {}

        BOOST_UBLAS_INLINE
        ~shallow_array_adaptor () {
        }

        // Resizing
    private:
        BOOST_UBLAS_INLINE
        void resize_internal (size_type size, value_type init, bool preserve = true) {
            if (size != size_) {
                shared_array<value_type> data (new value_type [size]);
                if (preserve) {
                    std::copy (data_.get (), data_.get () + (std::min) (size, size_), data.get ());
                    std::fill (data.get () + (std::min) (size, size_), data.get () + size, init);
                }
                size_ = size;
                data_ = data;
            }
        }
        BOOST_UBLAS_INLINE
        void resize_internal (size_type size, pointer data, value_type init, bool preserve = true) {
            if (preserve) {
                std::copy (data_.get (), data_.get () + (std::min) (size, size_), data);
                std::fill (data + (std::min) (size, size_), data + size, init);
            }
            size_ = size;
            data_ = data;
        }
    public:
        BOOST_UBLAS_INLINE
        void resize (size_type size) {
            resize_internal (size, value_type (), false);
        }
        BOOST_UBLAS_INLINE