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author | Daniel Wilhelm <shieldwed@outlook.com> | 2017-02-13 21:25:04 -0700 |
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committer | Daniel Wilhelm <shieldwed@outlook.com> | 2017-02-13 21:25:04 -0700 |
commit | 9d071d2a2cec9a7662a02669488569a017f0ea35 (patch) | |
tree | c83a623fbdff098339b66d21ea2e81f3f67344ae /zen/fixed_list.h | |
parent | 8.8 (diff) | |
download | FreeFileSync-9d071d2a2cec9a7662a02669488569a017f0ea35.tar.gz FreeFileSync-9d071d2a2cec9a7662a02669488569a017f0ea35.tar.bz2 FreeFileSync-9d071d2a2cec9a7662a02669488569a017f0ea35.zip |
8.9
Diffstat (limited to 'zen/fixed_list.h')
-rwxr-xr-x[-rw-r--r--] | zen/fixed_list.h | 478 |
1 files changed, 239 insertions, 239 deletions
diff --git a/zen/fixed_list.h b/zen/fixed_list.h index 27eb488c..e143c7b7 100644..100755 --- a/zen/fixed_list.h +++ b/zen/fixed_list.h @@ -1,239 +1,239 @@ -// ***************************************************************************** -// * This file is part of the FreeFileSync project. It is distributed under * -// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 * -// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved * -// ***************************************************************************** - -#ifndef FIXED_LIST_H_01238467085684139453534 -#define FIXED_LIST_H_01238467085684139453534 - -#include <cassert> -#include <iterator> -#include "stl_tools.h" - -namespace zen -{ -//std::list(C++11)-like class for inplace element construction supporting non-copyable/non-movable types -//-> no iterator invalidation after emplace_back() - -template <class T> -class FixedList -{ - struct Node - { - template <class... Args> - Node(Args&& ... args) : val(std::forward<Args>(args)...) {} - - Node* next = nullptr; //singly-linked list is sufficient - T val; - }; - -public: - FixedList() {} - - ~FixedList() { clear(); } - - template <class NodeT, class U> - class FixedIterator : public std::iterator<std::forward_iterator_tag, U> - { - public: - FixedIterator(NodeT* it = nullptr) : it_(it) {} - FixedIterator& operator++() { it_ = it_->next; return *this; } - inline friend bool operator==(const FixedIterator& lhs, const FixedIterator& rhs) { return lhs.it_ == rhs.it_; } - inline friend bool operator!=(const FixedIterator& lhs, const FixedIterator& rhs) { return !(lhs == rhs); } - U& operator* () const { return it_->val; } - U* operator->() const { return &it_->val; } - private: - NodeT* it_; - }; - - using value_type = T; - using iterator = FixedIterator< Node, T>; - using const_iterator = FixedIterator<const Node, const T>; - using reference = T&; - using const_reference = const T&; - - iterator begin() { return firstInsert_; } - iterator end () { return iterator(); } - - const_iterator begin() const { return firstInsert_; } - const_iterator end () const { return const_iterator(); } - - //const_iterator cbegin() const { return firstInsert_; } - //const_iterator cend () const { return const_iterator(); } - - reference front() { return firstInsert_->val; } - const_reference front() const { return firstInsert_->val; } - - reference& back() { return lastInsert_->val; } - const_reference& back() const { return lastInsert_->val; } - - template <class... Args> - void emplace_back(Args&& ... args) - { - Node* newNode = new Node(std::forward<Args>(args)...); - - if (!lastInsert_) - { - assert(!firstInsert_ && sz_ == 0); - firstInsert_ = lastInsert_ = newNode; - } - else - { - assert(lastInsert_->next == nullptr); - lastInsert_->next = newNode; - lastInsert_ = newNode; - } - ++sz_; - } - - template <class Predicate> - void remove_if(Predicate pred) - { - Node* prev = nullptr; - Node* ptr = firstInsert_; - - while (ptr) - if (pred(ptr->val)) - { - Node* next = ptr->next; - - delete ptr; - assert(sz_ > 0); - --sz_; - - ptr = next; - - if (prev) - prev->next = next; - else - firstInsert_ = next; - if (!next) - lastInsert_ = prev; - } - else - { - prev = ptr; - ptr = ptr->next; - } - } - - void clear() - { - Node* ptr = firstInsert_; - while (ptr) - { - Node* next = ptr->next; - delete ptr; - ptr = next; - } - - sz_ = 0; - firstInsert_ = lastInsert_ = nullptr; - } - - bool empty() const { return sz_ == 0; } - - size_t size() const { return sz_; } - - void swap(FixedList& other) - { - std::swap(firstInsert_, other.firstInsert_); - std::swap(lastInsert_, other.lastInsert_); - std::swap(sz_, other.sz_); - } - -private: - FixedList (const FixedList&) = delete; - FixedList& operator=(const FixedList&) = delete; - - Node* firstInsert_ = nullptr; - Node* lastInsert_ = nullptr; //point to last insertion; required by efficient emplace_back() - size_t sz_ = 0; -}; - - -//just as fast as FixedList, but simpler, more CPU-cache-friendly => superseeds FixedList! -template <class T> -class FixedVector -{ -public: - FixedVector() {} - - /* - class EndIterator {}; //just like FixedList: no iterator invalidation after emplace_back() - - template <class V> - class FixedIterator : public std::iterator<std::forward_iterator_tag, V> //could make this random-access if needed - { - public: - FixedIterator(std::vector<std::unique_ptr<T>>& cont, size_t pos) : cont_(cont), pos_(pos) {} - FixedIterator& operator++() { ++pos_; return *this; } - inline friend bool operator==(const FixedIterator& lhs, EndIterator) { return lhs.pos_ == lhs.cont_.size(); } - inline friend bool operator!=(const FixedIterator& lhs, EndIterator) { return !(lhs == EndIterator()); } - V& operator* () const { return *cont_[pos_]; } - V* operator->() const { return &*cont_[pos_]; } - private: - std::vector<std::unique_ptr<T>>& cont_; - size_t pos_ = 0; - }; - */ - - template <class IterImpl, class V> - class FixedIterator : public std::iterator<std::forward_iterator_tag, V> //could make this bidirectional if needed - { - public: - FixedIterator(IterImpl it) : it_(it) {} - FixedIterator& operator++() { ++it_; return *this; } - inline friend bool operator==(const FixedIterator& lhs, const FixedIterator& rhs) { return lhs.it_ == rhs.it_; } - inline friend bool operator!=(const FixedIterator& lhs, const FixedIterator& rhs) { return !(lhs == rhs); } - V& operator* () const { return **it_; } - V* operator->() const { return &** it_; } - private: - IterImpl it_; //TODO: avoid iterator invalidation after emplace_back(); caveat: end() must not store old length! - }; - - using value_type = T; - using iterator = FixedIterator<typename std::vector<std::unique_ptr<T>>::iterator, T>; - using const_iterator = FixedIterator<typename std::vector<std::unique_ptr<T>>::const_iterator, const T>; - using reference = T&; - using const_reference = const T&; - - iterator begin() { return items_.begin(); } - iterator end () { return items_.end (); } - - const_iterator begin() const { return items_.begin(); } - const_iterator end () const { return items_.end (); } - - reference front() { return *items_.front(); } - const_reference front() const { return *items_.front(); } - - reference& back() { return *items_.back(); } - const_reference& back() const { return *items_.back(); } - - template <class... Args> - void emplace_back(Args&& ... args) - { - items_.push_back(std::make_unique<T>(std::forward<Args>(args)...)); - } - - template <class Predicate> - void remove_if(Predicate pred) - { - erase_if(items_, [&](const std::unique_ptr<T>& p) { return pred(*p); }); - } - - void clear() { items_.clear(); } - bool empty() const { return items_.empty(); } - size_t size () const { return items_.size(); } - void swap(FixedVector& other) { items_.swap(other.items_); } - -private: - FixedVector (const FixedVector&) = delete; - FixedVector& operator=(const FixedVector&) = delete; - - std::vector<std::unique_ptr<T>> items_; -}; -} - -#endif //FIXED_LIST_H_01238467085684139453534 +// *****************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 *
+// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
+// *****************************************************************************
+
+#ifndef FIXED_LIST_H_01238467085684139453534
+#define FIXED_LIST_H_01238467085684139453534
+
+#include <cassert>
+#include <iterator>
+#include "stl_tools.h"
+
+namespace zen
+{
+//std::list(C++11)-like class for inplace element construction supporting non-copyable/non-movable types
+//-> no iterator invalidation after emplace_back()
+
+template <class T>
+class FixedList
+{
+ struct Node
+ {
+ template <class... Args>
+ Node(Args&& ... args) : val(std::forward<Args>(args)...) {}
+
+ Node* next = nullptr; //singly-linked list is sufficient
+ T val;
+ };
+
+public:
+ FixedList() {}
+
+ ~FixedList() { clear(); }
+
+ template <class NodeT, class U>
+ class FixedIterator : public std::iterator<std::forward_iterator_tag, U>
+ {
+ public:
+ FixedIterator(NodeT* it = nullptr) : it_(it) {}
+ FixedIterator& operator++() { it_ = it_->next; return *this; }
+ inline friend bool operator==(const FixedIterator& lhs, const FixedIterator& rhs) { return lhs.it_ == rhs.it_; }
+ inline friend bool operator!=(const FixedIterator& lhs, const FixedIterator& rhs) { return !(lhs == rhs); }
+ U& operator* () const { return it_->val; }
+ U* operator->() const { return &it_->val; }
+ private:
+ NodeT* it_;
+ };
+
+ using value_type = T;
+ using iterator = FixedIterator< Node, T>;
+ using const_iterator = FixedIterator<const Node, const T>;
+ using reference = T&;
+ using const_reference = const T&;
+
+ iterator begin() { return firstInsert_; }
+ iterator end () { return iterator(); }
+
+ const_iterator begin() const { return firstInsert_; }
+ const_iterator end () const { return const_iterator(); }
+
+ //const_iterator cbegin() const { return firstInsert_; }
+ //const_iterator cend () const { return const_iterator(); }
+
+ reference front() { return firstInsert_->val; }
+ const_reference front() const { return firstInsert_->val; }
+
+ reference& back() { return lastInsert_->val; }
+ const_reference& back() const { return lastInsert_->val; }
+
+ template <class... Args>
+ void emplace_back(Args&& ... args)
+ {
+ Node* newNode = new Node(std::forward<Args>(args)...);
+
+ if (!lastInsert_)
+ {
+ assert(!firstInsert_ && sz_ == 0);
+ firstInsert_ = lastInsert_ = newNode;
+ }
+ else
+ {
+ assert(lastInsert_->next == nullptr);
+ lastInsert_->next = newNode;
+ lastInsert_ = newNode;
+ }
+ ++sz_;
+ }
+
+ template <class Predicate>
+ void remove_if(Predicate pred)
+ {
+ Node* prev = nullptr;
+ Node* ptr = firstInsert_;
+
+ while (ptr)
+ if (pred(ptr->val))
+ {
+ Node* next = ptr->next;
+
+ delete ptr;
+ assert(sz_ > 0);
+ --sz_;
+
+ ptr = next;
+
+ if (prev)
+ prev->next = next;
+ else
+ firstInsert_ = next;
+ if (!next)
+ lastInsert_ = prev;
+ }
+ else
+ {
+ prev = ptr;
+ ptr = ptr->next;
+ }
+ }
+
+ void clear()
+ {
+ Node* ptr = firstInsert_;
+ while (ptr)
+ {
+ Node* next = ptr->next;
+ delete ptr;
+ ptr = next;
+ }
+
+ sz_ = 0;
+ firstInsert_ = lastInsert_ = nullptr;
+ }
+
+ bool empty() const { return sz_ == 0; }
+
+ size_t size() const { return sz_; }
+
+ void swap(FixedList& other)
+ {
+ std::swap(firstInsert_, other.firstInsert_);
+ std::swap(lastInsert_, other.lastInsert_);
+ std::swap(sz_, other.sz_);
+ }
+
+private:
+ FixedList (const FixedList&) = delete;
+ FixedList& operator=(const FixedList&) = delete;
+
+ Node* firstInsert_ = nullptr;
+ Node* lastInsert_ = nullptr; //point to last insertion; required by efficient emplace_back()
+ size_t sz_ = 0;
+};
+
+
+//just as fast as FixedList, but simpler, more CPU-cache-friendly => superseeds FixedList!
+template <class T>
+class FixedVector
+{
+public:
+ FixedVector() {}
+
+ /*
+ class EndIterator {}; //just like FixedList: no iterator invalidation after emplace_back()
+
+ template <class V>
+ class FixedIterator : public std::iterator<std::forward_iterator_tag, V> //could make this random-access if needed
+ {
+ public:
+ FixedIterator(std::vector<std::unique_ptr<T>>& cont, size_t pos) : cont_(cont), pos_(pos) {}
+ FixedIterator& operator++() { ++pos_; return *this; }
+ inline friend bool operator==(const FixedIterator& lhs, EndIterator) { return lhs.pos_ == lhs.cont_.size(); }
+ inline friend bool operator!=(const FixedIterator& lhs, EndIterator) { return !(lhs == EndIterator()); }
+ V& operator* () const { return *cont_[pos_]; }
+ V* operator->() const { return &*cont_[pos_]; }
+ private:
+ std::vector<std::unique_ptr<T>>& cont_;
+ size_t pos_ = 0;
+ };
+ */
+
+ template <class IterImpl, class V>
+ class FixedIterator : public std::iterator<std::forward_iterator_tag, V> //could make this bidirectional if needed
+ {
+ public:
+ FixedIterator(IterImpl it) : it_(it) {}
+ FixedIterator& operator++() { ++it_; return *this; }
+ inline friend bool operator==(const FixedIterator& lhs, const FixedIterator& rhs) { return lhs.it_ == rhs.it_; }
+ inline friend bool operator!=(const FixedIterator& lhs, const FixedIterator& rhs) { return !(lhs == rhs); }
+ V& operator* () const { return **it_; }
+ V* operator->() const { return &** it_; }
+ private:
+ IterImpl it_; //TODO: avoid iterator invalidation after emplace_back(); caveat: end() must not store old length!
+ };
+
+ using value_type = T;
+ using iterator = FixedIterator<typename std::vector<std::unique_ptr<T>>::iterator, T>;
+ using const_iterator = FixedIterator<typename std::vector<std::unique_ptr<T>>::const_iterator, const T>;
+ using reference = T&;
+ using const_reference = const T&;
+
+ iterator begin() { return items_.begin(); }
+ iterator end () { return items_.end (); }
+
+ const_iterator begin() const { return items_.begin(); }
+ const_iterator end () const { return items_.end (); }
+
+ reference front() { return *items_.front(); }
+ const_reference front() const { return *items_.front(); }
+
+ reference& back() { return *items_.back(); }
+ const_reference& back() const { return *items_.back(); }
+
+ template <class... Args>
+ void emplace_back(Args&& ... args)
+ {
+ items_.push_back(std::make_unique<T>(std::forward<Args>(args)...));
+ }
+
+ template <class Predicate>
+ void remove_if(Predicate pred)
+ {
+ erase_if(items_, [&](const std::unique_ptr<T>& p) { return pred(*p); });
+ }
+
+ void clear() { items_.clear(); }
+ bool empty() const { return items_.empty(); }
+ size_t size () const { return items_.size(); }
+ void swap(FixedVector& other) { items_.swap(other.items_); }
+
+private:
+ FixedVector (const FixedVector&) = delete;
+ FixedVector& operator=(const FixedVector&) = delete;
+
+ std::vector<std::unique_ptr<T>> items_;
+};
+}
+
+#endif //FIXED_LIST_H_01238467085684139453534
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