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ff893307d0
* algo.h, algobase.h, alloc.h, bvector.h, deque.h, hashtable.h, iterator.h, list.h, rope.h, ropeimpl.h, slist.h, stl_config.h, tree.h, vector.h: Update To September 8 SGI release. From-SVN: r15211
524 lines
17 KiB
C++
524 lines
17 KiB
C++
/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*
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* Copyright (c) 1996
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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#ifndef __SGI_STL_VECTOR_H
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#define __SGI_STL_VECTOR_H
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#include <stddef.h>
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#include <algobase.h>
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#include <alloc.h>
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template <class T, class Alloc = alloc>
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class vector {
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public:
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typedef T value_type;
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typedef value_type* pointer;
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typedef value_type* iterator;
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typedef const value_type* const_iterator;
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typedef value_type& reference;
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typedef const value_type& const_reference;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
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typedef reverse_iterator<const_iterator> const_reverse_iterator;
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typedef reverse_iterator<iterator> reverse_iterator;
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#else /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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typedef reverse_iterator<const_iterator, value_type, const_reference,
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difference_type> const_reverse_iterator;
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typedef reverse_iterator<iterator, value_type, reference, difference_type>
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reverse_iterator;
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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protected:
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typedef simple_alloc<value_type, Alloc> data_allocator;
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iterator start;
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iterator finish;
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iterator end_of_storage;
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void insert_aux(iterator position, const T& x);
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void deallocate() {
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if (start) data_allocator::deallocate(start, end_of_storage - start);
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}
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public:
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iterator begin() { return start; }
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const_iterator begin() const { return start; }
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iterator end() { return finish; }
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const_iterator end() const { return finish; }
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reverse_iterator rbegin() { return reverse_iterator(end()); }
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const_reverse_iterator rbegin() const {
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return const_reverse_iterator(end());
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}
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reverse_iterator rend() { return reverse_iterator(begin()); }
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const_reverse_iterator rend() const {
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return const_reverse_iterator(begin());
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}
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size_type size() const { return size_type(end() - begin()); }
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size_type max_size() const { return size_type(-1); }
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size_type capacity() const { return size_type(end_of_storage - begin()); }
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bool empty() const { return begin() == end(); }
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reference operator[](size_type n) { return *(begin() + n); }
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const_reference operator[](size_type n) const { return *(begin() + n); }
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vector() : start(0), finish(0), end_of_storage(0) {}
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vector(size_type n, const T& value) {
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start = allocate_and_fill(n, value);
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finish = start + n;
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end_of_storage = finish;
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}
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explicit vector(size_type n) {
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start = allocate_and_fill(n, T());
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finish = start + n;
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end_of_storage = finish;
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}
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vector(const vector<T, Alloc>& x) {
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start = allocate_and_copy(x.end() - x.begin(), x.begin(), x.end());
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finish = start + (x.end() - x.begin());
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end_of_storage = finish;
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}
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#ifdef __STL_MEMBER_TEMPLATES
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template <class InputIterator>
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vector(InputIterator first, InputIterator last) :
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start(0), finish(0), end_of_storage(0) {
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range_initialize(first, last, iterator_category(first));
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}
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#else /* __STL_MEMBER_TEMPLATES */
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vector(const_iterator first, const_iterator last) {
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size_type n = 0;
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distance(first, last, n);
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start = allocate_and_copy(n, first, last);
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finish = start + n;
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end_of_storage = finish;
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}
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#endif /* __STL_MEMBER_TEMPLATES */
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~vector() {
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destroy(start, finish);
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deallocate();
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}
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vector<T, Alloc>& operator=(const vector<T, Alloc>& x);
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void reserve(size_type n) {
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if (capacity() < n) {
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const size_type old_size = size();
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const iterator tmp = allocate_and_copy(n, start, finish);
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destroy(start, finish);
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deallocate();
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start = tmp;
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finish = tmp + old_size;
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end_of_storage = start + n;
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}
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}
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reference front() { return *begin(); }
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const_reference front() const { return *begin(); }
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reference back() { return *(end() - 1); }
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const_reference back() const { return *(end() - 1); }
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void push_back(const T& x) {
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if (finish != end_of_storage) {
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construct(finish, x);
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++finish;
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} else
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insert_aux(end(), x);
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}
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void swap(vector<T, Alloc>& x) {
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::swap(start, x.start);
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::swap(finish, x.finish);
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::swap(end_of_storage, x.end_of_storage);
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}
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iterator insert(iterator position, const T& x) {
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size_type n = position - begin();
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if (finish != end_of_storage && position == end()) {
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construct(finish, x);
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++finish;
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} else
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insert_aux(position, x);
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return begin() + n;
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}
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iterator insert(iterator position) { return insert(position, T()); }
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#ifdef __STL_MEMBER_TEMPLATES
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template <class InputIterator>
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void insert(iterator position, InputIterator first, InputIterator last) {
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range_insert(position, first, last, iterator_category(first));
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}
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#else /* __STL_MEMBER_TEMPLATES */
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void insert(iterator position,
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const_iterator first, const_iterator last);
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#endif /* __STL_MEMBER_TEMPLATES */
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void insert (iterator position, size_type n, const T& x);
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void pop_back() {
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--finish;
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destroy(finish);
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}
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void erase(iterator position) {
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if (position + 1 != end())
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copy(position + 1, finish, position);
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--finish;
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destroy(finish);
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}
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void erase(iterator first, iterator last) {
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iterator i = copy(last, finish, first);
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destroy(i, finish);
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finish = finish - (last - first);
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}
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void resize(size_type new_size, const T& x) {
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if (new_size < size())
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erase(begin() + new_size, end());
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else
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insert(end(), new_size - size(), x);
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}
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void resize(size_type new_size) { resize(new_size, T()); }
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void clear() { erase(begin(), end()); }
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protected:
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iterator allocate_and_fill(size_type n, const T& x) {
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iterator result = data_allocator::allocate(n);
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# ifdef __STL_USE_EXCEPTIONS
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try {
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# endif /* __STL_USE_EXCEPTIONS */
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uninitialized_fill_n(result, n, x);
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return result;
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# ifdef __STL_USE_EXCEPTIONS
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}
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catch(...) {
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data_allocator::deallocate(result, n);
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throw;
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}
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# endif /* __STL_USE_EXCEPTIONS */
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}
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#ifdef __STL_MEMBER_TEMPLATES
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template <class ForwardIterator>
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iterator allocate_and_copy(size_type n,
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ForwardIterator first, ForwardIterator last) {
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iterator result = data_allocator::allocate(n);
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# ifdef __STL_USE_EXCEPTIONS
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try {
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# endif /* __STL_USE_EXCEPTIONS */
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uninitialized_copy(first, last, result);
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return result;
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# ifdef __STL_USE_EXCEPTIONS
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}
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catch(...) {
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data_allocator::deallocate(result, n);
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throw;
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}
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# endif /* __STL_USE_EXCEPTIONS */
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}
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#else /* __STL_MEMBER_TEMPLATES */
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iterator allocate_and_copy(size_type n,
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const_iterator first, const_iterator last) {
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iterator result = data_allocator::allocate(n);
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# ifdef __STL_USE_EXCEPTIONS
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try {
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# endif /* __STL_USE_EXCEPTIONS */
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uninitialized_copy(first, last, result);
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return result;
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# ifdef __STL_USE_EXCEPTIONS
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}
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catch(...) {
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data_allocator::deallocate(result, n);
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throw;
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}
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# endif /* __STL_USE_EXCEPTIONS */
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}
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#endif /* __STL_MEMBER_TEMPLATES */
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#ifdef __STL_MEMBER_TEMPLATES
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template <class InputIterator>
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void range_initialize(InputIterator first, InputIterator last,
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input_iterator_tag) {
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for ( ; first != last; ++first)
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push_back(*first);
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}
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// This function is only called by the constructor. We have to worry
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// about resource leaks, but not about maintaining invariants.
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template <class ForwardIterator>
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void range_initialize(ForwardIterator first, ForwardIterator last,
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forward_iterator_tag) {
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size_type n = 0;
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distance(first, last, n);
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start = allocate_and_copy(n, first, last);
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finish = start + n;
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end_of_storage = finish;
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}
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template <class InputIterator>
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void range_insert(iterator pos,
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InputIterator first, InputIterator last,
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input_iterator_tag);
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template <class ForwardIterator>
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void range_insert(iterator pos,
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ForwardIterator first, ForwardIterator last,
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forward_iterator_tag);
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#endif /* __STL_MEMBER_TEMPLATES */
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};
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template <class T, class Alloc>
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inline bool operator==(const vector<T, Alloc>& x, const vector<T, Alloc>& y) {
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return x.size() == y.size() && equal(x.begin(), x.end(), y.begin());
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}
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template <class T, class Alloc>
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inline bool operator<(const vector<T, Alloc>& x, const vector<T, Alloc>& y) {
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return lexicographical_compare(x.begin(), x.end(), y.begin(), y.end());
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}
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template <class T, class Alloc>
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vector<T, Alloc>& vector<T, Alloc>::operator=(const vector<T, Alloc>& x) {
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if (&x != this) {
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if (x.size() > capacity()) {
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const iterator tmp = allocate_and_copy(x.end() - x.begin(),
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x.begin(), x.end());
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destroy(start, finish);
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deallocate();
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start = tmp;
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end_of_storage = start + (x.end() - x.begin());
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}
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else if (size() >= x.size()) {
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iterator i = copy(x.begin(), x.end(), begin());
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destroy(i, finish);
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}
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else {
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copy(x.begin(), x.begin() + size(), start);
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uninitialized_copy(x.begin() + size(), x.end(), finish);
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}
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finish = start + x.size();
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}
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return *this;
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}
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template <class T, class Alloc>
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void vector<T, Alloc>::insert_aux(iterator position, const T& x) {
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if (finish != end_of_storage) {
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construct(finish, *(finish - 1));
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++finish;
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T x_copy = x;
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copy_backward(position, finish - 2, finish - 1);
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*position = x_copy;
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}
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else {
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const size_type old_size = size();
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const size_type len = old_size != 0 ? 2 * old_size : 1;
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const iterator new_start = data_allocator::allocate(len);
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iterator new_finish = new_start;
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# ifdef __STL_USE_EXCEPTIONS
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try {
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# endif /* __STL_USE_EXCEPTIONS */
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new_finish = uninitialized_copy(start, position, new_start);
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construct(new_finish, x);
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++new_finish;
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new_finish = uninitialized_copy(position, finish, new_finish);
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# ifdef __STL_USE_EXCEPTIONS
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}
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catch(...) {
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destroy(new_start, new_finish);
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data_allocator::deallocate(new_start, len);
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throw;
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}
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# endif /* __STL_USE_EXCEPTIONS */
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destroy(begin(), end());
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deallocate();
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start = new_start;
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finish = new_finish;
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end_of_storage = new_start + len;
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}
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}
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template <class T, class Alloc>
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void vector<T, Alloc>::insert(iterator position, size_type n, const T& x) {
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if (n != 0) {
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if (size_type (end_of_storage - finish) >= n) {
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T x_copy = x;
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const size_type elems_after = finish - position;
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const iterator old_finish = finish;
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if (elems_after > n) {
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uninitialized_copy(finish - n, finish, finish);
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finish += n;
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copy_backward(position, old_finish - n, old_finish);
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fill(position, position + n, x_copy);
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}
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else {
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uninitialized_fill_n(finish, n - elems_after, x_copy);
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finish += n - elems_after;
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uninitialized_copy(position, old_finish, finish);
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finish += elems_after;
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fill(position, old_finish, x_copy);
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}
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}
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else {
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const size_type old_size = size();
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const size_type len = old_size + max(old_size, n);
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const iterator new_start = data_allocator::allocate(len);
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iterator new_finish = new_start;
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# ifdef __STL_USE_EXCEPTIONS
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try {
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# endif /* __STL_USE_EXCEPTIONS */
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new_finish = uninitialized_copy(start, position, new_start);
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new_finish = uninitialized_fill_n(new_finish, n, x);
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new_finish = uninitialized_copy(position, finish, new_finish);
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# ifdef __STL_USE_EXCEPTIONS
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}
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catch(...) {
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destroy(new_start, new_finish);
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data_allocator::deallocate(new_start, len);
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throw;
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}
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# endif /* __STL_USE_EXCEPTIONS */
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destroy(start, finish);
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deallocate();
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start = new_start;
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finish = new_finish;
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end_of_storage = new_start + len;
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}
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}
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}
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#ifdef __STL_MEMBER_TEMPLATES
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template <class T, class Alloc> template <class InputIterator>
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void vector<T, Alloc>::range_insert(iterator pos,
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InputIterator first, InputIterator last,
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input_iterator_tag) {
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for ( ; first != last; ++first) {
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pos = insert(pos, *first);
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++pos;
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}
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}
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template <class T, class Alloc> template <class ForwardIterator>
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void vector<T, Alloc>::range_insert(iterator position,
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ForwardIterator first,
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ForwardIterator last,
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forward_iterator_tag) {
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if (first != last) {
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size_type n = 0;
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distance(first, last, n);
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if (size_type (end_of_storage - finish) >= n) {
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const size_type elems_after = finish - position;
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const iterator old_finish = finish;
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if (elems_after > n) {
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uninitialized_copy(finish - n, finish, finish);
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finish += n;
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copy_backward(position, old_finish - n, old_finish);
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copy(first, last, position);
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}
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else {
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ForwardIterator mid = first;
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advance(mid, elems_after);
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uninitialized_copy(mid, last, finish);
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finish += n - elems_after;
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uninitialized_copy(position, old_finish, finish);
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finish += elems_after;
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copy(first, mid, position);
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}
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}
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else {
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const size_type old_size = size();
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const size_type len = old_size + max(old_size, n);
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const iterator new_start = data_allocator::allocate(len);
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iterator new_finish = new_start;
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# ifdef __STL_USE_EXCEPTIONS
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try {
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# endif /* __STL_USE_EXCEPTIONS */
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new_finish = uninitialized_copy(start, position, new_start);
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new_finish = uninitialized_copy(first, last, new_finish);
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new_finish = uninitialized_copy(position, finish, new_finish);
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# ifdef __STL_USE_EXCEPTIONS
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}
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catch(...) {
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destroy(new_start, new_finish);
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data_allocator::deallocate(new_start, len);
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throw;
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}
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# endif /* __STL_USE_EXCEPTIONS */
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destroy(start, finish);
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deallocate();
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start = new_start;
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finish = new_finish;
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end_of_storage = new_start + len;
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}
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}
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}
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#else /* __STL_MEMBER_TEMPLATES */
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template <class T, class Alloc>
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void vector<T, Alloc>::insert(iterator position,
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const_iterator first,
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const_iterator last) {
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if (first != last) {
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size_type n = 0;
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distance(first, last, n);
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if (end_of_storage - finish >= n) {
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const size_type elems_after = finish - position;
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const iterator old_finish = finish;
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if (elems_after > n) {
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uninitialized_copy(finish - n, finish, finish);
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finish += n;
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copy_backward(position, old_finish - n, old_finish);
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copy(first, last, position);
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}
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else {
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uninitialized_copy(first + elems_after, last, finish);
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finish += n - elems_after;
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uninitialized_copy(position, old_finish, finish);
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finish += elems_after;
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copy(first, first + elems_after, position);
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}
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}
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else {
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const size_type old_size = size();
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const size_type len = old_size + max(old_size, n);
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const iterator new_start = data_allocator::allocate(len);
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|
iterator new_finish = new_start;
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|
# ifdef __STL_USE_EXCEPTIONS
|
|
try {
|
|
# endif /* __STL_USE_EXCEPTIONS */
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|
new_finish = uninitialized_copy(start, position, new_start);
|
|
new_finish = uninitialized_copy(first, last, new_finish);
|
|
new_finish = uninitialized_copy(position, finish, new_finish);
|
|
# ifdef __STL_USE_EXCEPTIONS
|
|
}
|
|
catch(...) {
|
|
destroy(new_start, new_finish);
|
|
data_allocator::deallocate(new_start, len);
|
|
throw;
|
|
}
|
|
# endif /* __STL_USE_EXCEPTIONS */
|
|
destroy(start, finish);
|
|
deallocate();
|
|
start = new_start;
|
|
finish = new_finish;
|
|
end_of_storage = new_start + len;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* __STL_MEMBER_TEMPLATES */
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|
|
|
#endif /* __SGI_STL_VECTOR_H */
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