stl_vector.h
资源名称:Vc_STL.rar [点击查看]
上传用户:sichengcw
上传日期:2009-02-17
资源大小:202k
文件大小:17k
源码类别:
STL
开发平台:
Visual C++
- /*
- *
- * Copyright (c) 1994
- * Hewlett-Packard Company
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation. Hewlett-Packard Company makes no
- * representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied warranty.
- *
- *
- * Copyright (c) 1996
- * Silicon Graphics Computer Systems, Inc.
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation. Silicon Graphics makes no
- * representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied warranty.
- */
- /* NOTE: This is an internal header file, included by other STL headers.
- * You should not attempt to use it directly.
- */
- #ifndef __SGI_STL_INTERNAL_VECTOR_H
- #define __SGI_STL_INTERNAL_VECTOR_H
- __STL_BEGIN_NAMESPACE
- #if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
- #pragma set woff 1174
- #endif
- template <class T, class Alloc = alloc>
- class vector {
- public:
- typedef T value_type;
- typedef value_type* pointer;
- typedef const value_type* const_pointer;
- typedef value_type* iterator;
- typedef const value_type* const_iterator;
- typedef value_type& reference;
- typedef const value_type& const_reference;
- typedef size_t size_type;
- typedef ptrdiff_t difference_type;
- #ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
- typedef reverse_iterator<const_iterator> const_reverse_iterator;
- typedef reverse_iterator<iterator> reverse_iterator;
- #else /* __STL_CLASS_PARTIAL_SPECIALIZATION */
- typedef reverse_iterator<const_iterator, value_type, const_reference,
- difference_type> const_reverse_iterator;
- typedef reverse_iterator<iterator, value_type, reference, difference_type>
- reverse_iterator;
- #endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
- protected:
- typedef simple_alloc<value_type, Alloc> data_allocator;
- iterator start;
- iterator finish;
- iterator end_of_storage;
- void insert_aux(iterator position, const T& x);
- void deallocate() {
- if (start) data_allocator::deallocate(start, end_of_storage - start);
- }
- void fill_initialize(size_type n, const T& value) {
- start = allocate_and_fill(n, value);
- finish = start + n;
- end_of_storage = finish;
- }
- public:
- iterator begin() { return start; }
- const_iterator begin() const { return start; }
- iterator end() { return finish; }
- const_iterator end() const { return finish; }
- reverse_iterator rbegin() { return reverse_iterator(end()); }
- const_reverse_iterator rbegin() const {
- return const_reverse_iterator(end());
- }
- reverse_iterator rend() { return reverse_iterator(begin()); }
- const_reverse_iterator rend() const {
- return const_reverse_iterator(begin());
- }
- size_type size() const { return size_type(end() - begin()); }
- size_type max_size() const { return size_type(-1) / sizeof(T); }
- size_type capacity() const { return size_type(end_of_storage - begin()); }
- bool empty() const { return begin() == end(); }
- reference operator[](size_type n) { return *(begin() + n); }
- const_reference operator[](size_type n) const { return *(begin() + n); }
- vector() : start(0), finish(0), end_of_storage(0) {}
- vector(size_type n, const T& value) { fill_initialize(n, value); }
- vector(int n, const T& value) { fill_initialize(n, value); }
- vector(long n, const T& value) { fill_initialize(n, value); }
- explicit vector(size_type n) { fill_initialize(n, T()); }
- vector(const vector<T, Alloc>& x) {
- start = allocate_and_copy(x.end() - x.begin(), x.begin(), x.end());
- finish = start + (x.end() - x.begin());
- end_of_storage = finish;
- }
- #ifdef __STL_MEMBER_TEMPLATES
- template <class InputIterator>
- vector(InputIterator first, InputIterator last) :
- start(0), finish(0), end_of_storage(0)
- {
- range_initialize(first, last, iterator_category(first));
- }
- #else /* __STL_MEMBER_TEMPLATES */
- vector(const_iterator first, const_iterator last) {
- size_type n = 0;
- distance(first, last, n);
- start = allocate_and_copy(n, first, last);
- finish = start + n;
- end_of_storage = finish;
- }
- #endif /* __STL_MEMBER_TEMPLATES */
- ~vector() {
- destroy(start, finish);
- deallocate();
- }
- vector<T, Alloc>& operator=(const vector<T, Alloc>& x);
- void reserve(size_type n) {
- if (capacity() < n) {
- const size_type old_size = size();
- iterator tmp = allocate_and_copy(n, start, finish);
- destroy(start, finish);
- deallocate();
- start = tmp;
- finish = tmp + old_size;
- end_of_storage = start + n;
- }
- }
- reference front() { return *begin(); }
- const_reference front() const { return *begin(); }
- reference back() { return *(end() - 1); }
- const_reference back() const { return *(end() - 1); }
- void push_back(const T& x) {
- if (finish != end_of_storage) {
- construct(finish, x);
- ++finish;
- }
- else
- insert_aux(end(), x);
- }
- void swap(vector<T, Alloc>& x) {
- __STD::swap(start, x.start);
- __STD::swap(finish, x.finish);
- __STD::swap(end_of_storage, x.end_of_storage);
- }
- iterator insert(iterator position, const T& x) {
- size_type n = position - begin();
- if (finish != end_of_storage && position == end()) {
- construct(finish, x);
- ++finish;
- }
- else
- insert_aux(position, x);
- return begin() + n;
- }
- iterator insert(iterator position) { return insert(position, T()); }
- #ifdef __STL_MEMBER_TEMPLATES
- template <class InputIterator>
- void insert(iterator position, InputIterator first, InputIterator last) {
- range_insert(position, first, last, iterator_category(first));
- }
- #else /* __STL_MEMBER_TEMPLATES */
- void insert(iterator position,
- const_iterator first, const_iterator last);
- #endif /* __STL_MEMBER_TEMPLATES */
- void insert (iterator pos, size_type n, const T& x);
- void insert (iterator pos, int n, const T& x) {
- insert(pos, (size_type) n, x);
- }
- void insert (iterator pos, long n, const T& x) {
- insert(pos, (size_type) n, x);
- }
- void pop_back() {
- --finish;
- destroy(finish);
- }
- iterator erase(iterator position) {
- if (position + 1 != end())
- copy(position + 1, finish, position);
- --finish;
- destroy(finish);
- return position;
- }
- iterator erase(iterator first, iterator last) {
- iterator i = copy(last, finish, first);
- destroy(i, finish);
- finish = finish - (last - first);
- return first;
- }
- void resize(size_type new_size, const T& x) {
- if (new_size < size())
- erase(begin() + new_size, end());
- else
- insert(end(), new_size - size(), x);
- }
- void resize(size_type new_size) { resize(new_size, T()); }
- void clear() { erase(begin(), end()); }
- protected:
- iterator allocate_and_fill(size_type n, const T& x) {
- iterator result = data_allocator::allocate(n);
- __STL_TRY {
- uninitialized_fill_n(result, n, x);
- return result;
- }
- __STL_UNWIND(data_allocator::deallocate(result, n));
- }
- #ifdef __STL_MEMBER_TEMPLATES
- template <class ForwardIterator>
- iterator allocate_and_copy(size_type n,
- ForwardIterator first, ForwardIterator last) {
- iterator result = data_allocator::allocate(n);
- __STL_TRY {
- uninitialized_copy(first, last, result);
- return result;
- }
- __STL_UNWIND(data_allocator::deallocate(result, n));
- }
- #else /* __STL_MEMBER_TEMPLATES */
- iterator allocate_and_copy(size_type n,
- const_iterator first, const_iterator last) {
- iterator result = data_allocator::allocate(n);
- __STL_TRY {
- uninitialized_copy(first, last, result);
- return result;
- }
- __STL_UNWIND(data_allocator::deallocate(result, n));
- }
- #endif /* __STL_MEMBER_TEMPLATES */
- #ifdef __STL_MEMBER_TEMPLATES
- template <class InputIterator>
- void range_initialize(InputIterator first, InputIterator last,
- input_iterator_tag) {
- for ( ; first != last; ++first)
- push_back(*first);
- }
- // This function is only called by the constructor. We have to worry
- // about resource leaks, but not about maintaining invariants.
- template <class ForwardIterator>
- void range_initialize(ForwardIterator first, ForwardIterator last,
- forward_iterator_tag) {
- size_type n = 0;
- distance(first, last, n);
- start = allocate_and_copy(n, first, last);
- finish = start + n;
- end_of_storage = finish;
- }
- template <class InputIterator>
- void range_insert(iterator pos,
- InputIterator first, InputIterator last,
- input_iterator_tag);
- template <class ForwardIterator>
- void range_insert(iterator pos,
- ForwardIterator first, ForwardIterator last,
- forward_iterator_tag);
- #endif /* __STL_MEMBER_TEMPLATES */
- };
- template <class T, class Alloc>
- inline bool operator==(const vector<T, Alloc>& x, const vector<T, Alloc>& y) {
- return x.size() == y.size() && equal(x.begin(), x.end(), y.begin());
- }
- template <class T, class Alloc>
- inline bool operator<(const vector<T, Alloc>& x, const vector<T, Alloc>& y) {
- return lexicographical_compare(x.begin(), x.end(), y.begin(), y.end());
- }
- #ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER
- template <class T, class Alloc>
- inline void swap(vector<T, Alloc>& x, vector<T, Alloc>& y) {
- x.swap(y);
- }
- #endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */
- template <class T, class Alloc>
- vector<T, Alloc>& vector<T, Alloc>::operator=(const vector<T, Alloc>& x) {
- if (&x != this) {
- if (x.size() > capacity()) {
- iterator tmp = allocate_and_copy(x.end() - x.begin(),
- x.begin(), x.end());
- destroy(start, finish);
- deallocate();
- start = tmp;
- end_of_storage = start + (x.end() - x.begin());
- }
- else if (size() >= x.size()) {
- iterator i = copy(x.begin(), x.end(), begin());
- destroy(i, finish);
- }
- else {
- copy(x.begin(), x.begin() + size(), start);
- uninitialized_copy(x.begin() + size(), x.end(), finish);
- }
- finish = start + x.size();
- }
- return *this;
- }
- template <class T, class Alloc>
- void vector<T, Alloc>::insert_aux(iterator position, const T& x) {
- if (finish != end_of_storage) {
- construct(finish, *(finish - 1));
- ++finish;
- T x_copy = x;
- copy_backward(position, finish - 2, finish - 1);
- *position = x_copy;
- }
- else {
- const size_type old_size = size();
- const size_type len = old_size != 0 ? 2 * old_size : 1;
- iterator new_start = data_allocator::allocate(len);
- iterator new_finish = new_start;
- __STL_TRY {
- new_finish = uninitialized_copy(start, position, new_start);
- construct(new_finish, x);
- ++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(begin(), end());
- deallocate();
- start = new_start;
- finish = new_finish;
- end_of_storage = new_start + len;
- }
- }
- template <class T, class Alloc>
- void vector<T, Alloc>::insert(iterator position, size_type n, const T& x) {
- if (n != 0) {
- if (size_type(end_of_storage - finish) >= n) {
- T x_copy = x;
- const size_type elems_after = finish - position;
- iterator old_finish = finish;
- if (elems_after > n) {
- uninitialized_copy(finish - n, finish, finish);
- finish += n;
- copy_backward(position, old_finish - n, old_finish);
- fill(position, position + n, x_copy);
- }
- else {
- uninitialized_fill_n(finish, n - elems_after, x_copy);
- finish += n - elems_after;
- uninitialized_copy(position, old_finish, finish);
- finish += elems_after;
- fill(position, old_finish, x_copy);
- }
- }
- else {
- const size_type old_size = size();
- const size_type len = old_size + max(old_size, n);
- iterator new_start = data_allocator::allocate(len);
- iterator new_finish = new_start;
- __STL_TRY {
- new_finish = uninitialized_copy(start, position, new_start);
- new_finish = uninitialized_fill_n(new_finish, n, x);
- 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;
- }
- }
- }
- #ifdef __STL_MEMBER_TEMPLATES
- template <class T, class Alloc> template <class InputIterator>
- void vector<T, Alloc>::range_insert(iterator pos,
- InputIterator first, InputIterator last,
- input_iterator_tag) {
- for ( ; first != last; ++first) {
- pos = insert(pos, *first);
- ++pos;
- }
- }
- template <class T, class Alloc> template <class ForwardIterator>
- void vector<T, Alloc>::range_insert(iterator position,
- ForwardIterator first,
- ForwardIterator last,
- forward_iterator_tag) {
- if (first != last) {
- size_type n = 0;
- distance(first, last, n);
- if (size_type(end_of_storage - finish) >= n) {
- const size_type elems_after = finish - position;
- iterator old_finish = finish;
- if (elems_after > n) {
- uninitialized_copy(finish - n, finish, finish);
- finish += n;
- copy_backward(position, old_finish - n, old_finish);
- copy(first, last, position);
- }
- else {
- ForwardIterator mid = first;
- advance(mid, elems_after);
- uninitialized_copy(mid, last, finish);
- finish += n - elems_after;
- uninitialized_copy(position, old_finish, finish);
- finish += elems_after;
- copy(first, mid, position);
- }
- }
- else {
- const size_type old_size = size();
- const size_type len = old_size + max(old_size, n);
- iterator new_start = data_allocator::allocate(len);
- iterator new_finish = new_start;
- __STL_TRY {
- 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;
- }
- }
- }
- #else /* __STL_MEMBER_TEMPLATES */
- template <class T, class Alloc>
- void vector<T, Alloc>::insert(iterator position,
- const_iterator first,
- const_iterator last) {
- if (first != last) {
- size_type n = 0;
- distance(first, last, n);
- if (size_type(end_of_storage - finish) >= n) {
- const size_type elems_after = finish - position;
- iterator old_finish = finish;
- if (elems_after > n) {
- uninitialized_copy(finish - n, finish, finish);
- finish += n;
- copy_backward(position, old_finish - n, old_finish);
- copy(first, last, position);
- }
- else {
- uninitialized_copy(first + elems_after, last, finish);
- finish += n - elems_after;
- uninitialized_copy(position, old_finish, finish);
- finish += elems_after;
- copy(first, first + elems_after, position);
- }
- }
- else {
- const size_type old_size = size();
- const size_type len = old_size + max(old_size, n);
- iterator new_start = data_allocator::allocate(len);
- iterator new_finish = new_start;
- __STL_TRY {
- 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 */
- #if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
- #pragma reset woff 1174
- #endif
- __STL_END_NAMESPACE
- #endif /* __SGI_STL_INTERNAL_VECTOR_H */
- // Local Variables:
- // mode:C++
- // End: