stl_list.h

STL完整源码,实现STL文件的读写和三维体的重建及其分析

/*
 *
 * 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) 1996,1997
 * 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_LIST_H
#define __SGI_STL_INTERNAL_LIST_H

__STL_BEGIN_NAMESPACE

#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma set woff 1174
#endif

template <class T>
struct __list_node {
  typedef void* void_pointer;
  void_pointer next;
  void_pointer prev;
  T data;
};

template<class T, class Ref, class Ptr>
struct __list_iterator {
  typedef __list_iterator<T, T&, T*>             iterator;
  typedef __list_iterator<T, const T&, const T*> const_iterator;
  typedef __list_iterator<T, Ref, Ptr>           self;

  typedef bidirectional_iterator_tag iterator_category;
  typedef T value_type;
  typedef Ptr pointer;
  typedef Ref reference;
  typedef __list_node<T>* link_type;
  typedef size_t size_type;
  typedef ptrdiff_t difference_type;

  link_type node;

  __list_iterator(link_type x) : node(x) {}
  __list_iterator() {}
  __list_iterator(const iterator& x) : node(x.node) {}

  bool operator==(const self& x) const { return node == x.node; }
  bool operator!=(const self& x) const { return node != x.node; }
  reference operator*() const { return (*node).data; }

#ifndef __SGI_STL_NO_ARROW_OPERATOR
  pointer operator->() const { return &(operator*()); }
#endif /* __SGI_STL_NO_ARROW_OPERATOR */

  self& operator++() { 
    node = (link_type)((*node).next);
    return *this;
  }
  self operator++(int) { 
    self tmp = *this;
    ++*this;
    return tmp;
  }
  self& operator--() { 
    node = (link_type)((*node).prev);
    return *this;
  }
  self operator--(int) { 
    self tmp = *this;
    --*this;
    return tmp;
  }
};

#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION

template <class T, class Ref, class Ptr>
inline bidirectional_iterator_tag
iterator_category(const __list_iterator<T, Ref, Ptr>&) {
  return bidirectional_iterator_tag();
}

template <class T, class Ref, class Ptr>
inline T*
value_type(const __list_iterator<T, Ref, Ptr>&) {
  return 0;
}

template <class T, class Ref, class Ptr>
inline ptrdiff_t*
distance_type(const __list_iterator<T, Ref, Ptr>&) {
  return 0;
}

#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */

template <class T, class Alloc = alloc>
class list {
protected:
  typedef void* void_pointer;
  typedef __list_node<T> list_node;
  typedef simple_alloc<list_node, Alloc> list_node_allocator;
public:      
  typedef T value_type;
  typedef value_type* pointer;
  typedef const value_type* const_pointer;
  typedef value_type& reference;
  typedef const value_type& const_reference;
  typedef list_node* link_type;
  typedef size_t size_type;
  typedef ptrdiff_t difference_type;

public:
  typedef __list_iterator<T, T&, T*>             iterator;
  typedef __list_iterator<T, const T&, const T*> const_iterator;

#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_bidirectional_iterator<const_iterator, value_type,
  const_reference, difference_type>
  const_reverse_iterator;
  typedef reverse_bidirectional_iterator<iterator, value_type, reference,
  difference_type>
  reverse_iterator; 
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */

protected:
  link_type get_node() { return list_node_allocator::allocate(); }
  void put_node(link_type p) { list_node_allocator::deallocate(p); }

  link_type create_node(const T& x) {
    link_type p = get_node();
    __STL_TRY {
      construct(&p->data, x);
    }
    __STL_UNWIND(put_node(p));
    return p;
  }
  void destroy_node(link_type p) {
    destroy(&p->data);
    put_node(p);
  }

protected:
  void empty_initialize() { 
    node = get_node();
    node->next = node;
    node->prev = node;
  }

  void fill_initialize(size_type n, const T& value) {
    empty_initialize();
    __STL_TRY {
      insert(begin(), n, value);
    }
    __STL_UNWIND(clear(); put_node(node));
  }

#ifdef __STL_MEMBER_TEMPLATES
  template <class InputIterator>
  void range_initialize(InputIterator first, InputIterator last) {
    empty_initialize();
    __STL_TRY {
      insert(begin(), first, last);
    }
    __STL_UNWIND(clear(); put_node(node));
  }
#else  /* __STL_MEMBER_TEMPLATES */
  void range_initialize(const T* first, const T* last) {
    empty_initialize();
    __STL_TRY {
      insert(begin(), first, last);
    }
    __STL_UNWIND(clear(); put_node(node));
  }
  void range_initialize(const_iterator first, const_iterator last) {
    empty_initialize();
    __STL_TRY {
      insert(begin(), first, last);
    }
    __STL_UNWIND(clear(); put_node(node));
  }
#endif /* __STL_MEMBER_TEMPLATES */

protected:
  link_type node;

public:
  list() { empty_initialize(); }

  iterator begin() { return (link_type)((*node).next); }
  const_iterator begin() const { return (link_type)((*node).next); }
  iterator end() { return node; }
  const_iterator end() const { return node; }
  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());
  } 
  bool empty() const { return node->next == node; }
  size_type size() const {
    size_type result = 0;
    distance(begin(), end(), result);
    return result;
  }
  size_type max_size() const { return size_type(-1); }
  reference front() { return *begin(); }
  const_reference front() const { return *begin(); }
  reference back() { return *(--end()); }
  const_reference back() const { return *(--end()); }
  void swap(list<T, Alloc>& x) { __STD::swap(node, x.node); }
  iterator insert(iterator position, const T& x) {
    link_type tmp = create_node(x);
    tmp->next = position.node;
    tmp->prev = position.node->prev;
    (link_type(position.node->prev))->next = tmp;
    position.node->prev = tmp;
    return tmp;
  }
  iterator insert(iterator position) { return insert(position, T()); }
#ifdef __STL_MEMBER_TEMPLATES
  template <class InputIterator>
  void insert(iterator position, InputIterator first, InputIterator last);
#else /* __STL_MEMBER_TEMPLATES */
  void insert(iterator position, const T* first, const T* last);
  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 push_front(const T& x) { insert(begin(), x); }
  void push_back(const T& x) { insert(end(), x); }
  iterator erase(iterator position) {
    link_type next_node = link_type(position.node->next);
    link_type prev_node = link_type(position.node->prev);
    prev_node->next = next_node;
    next_node->prev = prev_node;
    destroy_node(position.node);
    return iterator(next_node);
  }
  iterator erase(iterator first, iterator last);
  void resize(size_type new_size, const T& x);
  void resize(size_type new_size) { resize(new_size, T()); }
  void clear();

  void pop_front() { erase(begin()); }
  void pop_back() { 
    iterator tmp = end();
    erase(--tmp);
  }
  list(size_type n, const T& value) { fill_initialize(n, value); }
  list(int n, const T& value) { fill_initialize(n, value); }
  list(long n, const T& value) { fill_initialize(n, value); }
  explicit list(size_type n) { fill_initialize(n, T()); }

#ifdef __STL_MEMBER_TEMPLATES
  template <class InputIterator>
  list(InputIterator first, InputIterator last) {
    range_initialize(first, last);
  }

#else /* __STL_MEMBER_TEMPLATES */
  list(const T* first, const T* last) { range_initialize(first, last); }
  list(const_iterator first, const_iterator last) {
    range_initialize(first, last);
  }
#endif /* __STL_MEMBER_TEMPLATES */
  list(const list<T, Alloc>& x) {
    range_initialize(x.begin(), x.end());
  }
  ~list() {
    clear();
    put_node(node);
  }
  list<T, Alloc>& operator=(const list<T, Alloc>& x);

protected: