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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) ZenJu (zhnmju123 AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef FIXED_LIST_01238467085684139453534
#define FIXED_LIST_01238467085684139453534
#include <iterator>
namespace zen
{
//std::list(C++11) compatible class for inplace element construction supporting non-copyable/movable types
//may be replaced by C++11 std::list when available
template <class T>
class FixedList
{
struct Node
{
Node() : next(nullptr), val() {}
//no variadic templates on VC2010... :(
template <class A> Node(A&& a) : next(nullptr), val(std::forward<A>(a)) {}
template <class A, class B> Node(A&& a, B&& b) : next(nullptr), val(std::forward<A>(a), std::forward<B>(b)) {}
template <class A, class B, class C> Node(A&& a, B&& b, C&& c) : next(nullptr), val(std::forward<A>(a), std::forward<B>(b), std::forward<C>(c)) {}
template <class A, class B, class C, class D> Node(A&& a, B&& b, C&& c, D&& d) : next(nullptr), val(std::forward<A>(a), std::forward<B>(b), std::forward<C>(c), std::forward<D>(d)) {}
template <class A, class B, class C, class D, class E> Node(A&& a, B&& b, C&& c, D&& d, E&& e) : next(nullptr), val(std::forward<A>(a), std::forward<B>(b), std::forward<C>(c), std::forward<D>(d), std::forward<E>(e)) {}
template <class A, class B, class C, class D, class E, class F> Node(A&& a, B&& b, C&& c, D&& d, E&& e, F&& f) : next(nullptr), val(std::forward<A>(a), std::forward<B>(b), std::forward<C>(c), std::forward<D>(d), std::forward<E>(e), std::forward<F>(f)) {}
Node* next; //singly linked list is sufficient
T val;
};
public:
FixedList() :
first(nullptr),
lastInsert(nullptr),
sz(0) {}
~FixedList() { clear(); }
template <class NodeT, class U>
class ListIterator : public std::iterator<std::forward_iterator_tag, U>
{
public:
ListIterator(NodeT* it = nullptr) : iter(it) {}
ListIterator& operator++() { iter = iter->next; return *this; }
inline friend bool operator==(const ListIterator& lhs, const ListIterator& rhs) { return lhs.iter == rhs.iter; }
inline friend bool operator!=(const ListIterator& lhs, const ListIterator& rhs) { return !(lhs == rhs); }
U& operator* () { return iter->val; }
U* operator->() { return &iter->val; }
private:
NodeT* iter;
};
typedef T value_type;
typedef ListIterator<Node, T> iterator;
typedef ListIterator<const Node, const T> const_iterator;
typedef T& reference;
typedef const T& const_reference;
iterator begin() { return first; }
iterator end() { return iterator(); }
const_iterator begin() const { return first; }
const_iterator end () const { return const_iterator(); }
const_iterator cbegin() const { return first; }
const_iterator cend () const { return const_iterator(); }
reference front() { return first->val; }
const_reference front() const { return first->val; }
reference& back() { return lastInsert->val; }
const_reference& back() const { return lastInsert->val; }
void emplace_back() { pushNode(new Node); }
template <class A> void emplace_back(A&& a) { pushNode(new Node(std::forward<A>(a))); }
template <class A, class B> void emplace_back(A&& a, B&& b) { pushNode(new Node(std::forward<A>(a), std::forward<B>(b))); }
template <class A, class B, class C> void emplace_back(A&& a, B&& b, C&& c) { pushNode(new Node(std::forward<A>(a), std::forward<B>(b), std::forward<C>(c))); }
template <class A, class B, class C, class D> void emplace_back(A&& a, B&& b, C&& c, D&& d) { pushNode(new Node(std::forward<A>(a), std::forward<B>(b), std::forward<C>(c), std::forward<D>(d))); }
template <class A, class B, class C, class D, class E> void emplace_back(A&& a, B&& b, C&& c, D&& d, E&& e) { pushNode(new Node(std::forward<A>(a), std::forward<B>(b), std::forward<C>(c), std::forward<D>(d), std::forward<E>(e))); }
template <class A, class B, class C, class D, class E, class F> void emplace_back(A&& a, B&& b, C&& c, D&& d, E&& e, F&& f) { pushNode(new Node(std::forward<A>(a), std::forward<B>(b), std::forward<C>(c), std::forward<D>(d), std::forward<E>(e), std::forward<F>(f))); }
template <class Predicate>
void remove_if(Predicate pred)
{
Node* prev = nullptr;
Node* ptr = first;
while (ptr)
if (pred(ptr->val))
{
Node* tmp = ptr->next;
deleteNode(ptr);
if (prev)
prev->next = ptr = tmp;
else
first = ptr = tmp;
if (!tmp)
lastInsert = prev;
}
else
{
prev = ptr;
ptr = ptr->next;
}
}
void clear()
{
Node* ptr = first;
while (ptr)
{
Node* tmp = ptr;
ptr = ptr->next;
delete tmp;
}
first = lastInsert = nullptr;
sz = 0;
}
bool empty() const { return first == nullptr; }
size_t size() const { return sz; }
private:
FixedList(const FixedList&);
FixedList& operator=(const FixedList&);
void pushNode(Node* newNode) //throw()
{
++sz;
if (lastInsert == nullptr)
{
assert(first == nullptr);
first = lastInsert = newNode;
}
else
{
assert(lastInsert->next == nullptr);
lastInsert->next = newNode;
lastInsert = newNode;
}
}
void deleteNode(Node* oldNode)
{
assert(sz > 0);
--sz;
delete oldNode;
}
Node* first;
Node* lastInsert; //point to last insertion; required by efficient emplace_back()
size_t sz;
};
}
#endif //FIXED_LIST_01238467085684139453534
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