49646383f1
Happy new year to the wonderful Godot community!
2020 has been a tough year for most of us personally, but a good year for
Godot development nonetheless with a huge amount of work done towards Godot
4.0 and great improvements backported to the long-lived 3.2 branch.
We've had close to 400 contributors to engine code this year, authoring near
7,000 commit! (And that's only for the `master` branch and for the engine code,
there's a lot more when counting docs, demos and other first-party repos.)
Here's to a great year 2021 for all Godot users 🎆
(cherry picked from commit b5334d14f7)
307 lines
8.5 KiB
C++
307 lines
8.5 KiB
C++
/*************************************************************************/
|
|
/* ordered_hash_map.h */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#ifndef ORDERED_HASH_MAP_H
|
|
#define ORDERED_HASH_MAP_H
|
|
|
|
#include "core/hash_map.h"
|
|
#include "core/list.h"
|
|
#include "core/pair.h"
|
|
|
|
/**
|
|
* A hash map which allows to iterate elements in insertion order.
|
|
* Insertion, lookup, deletion have O(1) complexity.
|
|
* The API aims to be consistent with Map rather than HashMap, because the
|
|
* former is more frequently used and is more coherent with the rest of the
|
|
* codebase.
|
|
* Deletion during iteration is safe and will preserve the order.
|
|
*/
|
|
template <class K, class V, class Hasher = HashMapHasherDefault, class Comparator = HashMapComparatorDefault<K>, uint8_t MIN_HASH_TABLE_POWER = 3, uint8_t RELATIONSHIP = 8>
|
|
class OrderedHashMap {
|
|
typedef List<Pair<const K *, V> > InternalList;
|
|
typedef HashMap<K, typename InternalList::Element *, Hasher, Comparator, MIN_HASH_TABLE_POWER, RELATIONSHIP> InternalMap;
|
|
|
|
InternalList list;
|
|
InternalMap map;
|
|
|
|
public:
|
|
class Element {
|
|
friend class OrderedHashMap<K, V, Hasher, Comparator, MIN_HASH_TABLE_POWER, RELATIONSHIP>;
|
|
|
|
typename InternalList::Element *list_element;
|
|
typename InternalList::Element *prev_element;
|
|
typename InternalList::Element *next_element;
|
|
|
|
Element(typename InternalList::Element *p_element) {
|
|
list_element = p_element;
|
|
|
|
if (list_element) {
|
|
next_element = list_element->next();
|
|
prev_element = list_element->prev();
|
|
}
|
|
}
|
|
|
|
public:
|
|
_FORCE_INLINE_ Element() :
|
|
list_element(NULL),
|
|
prev_element(NULL),
|
|
next_element(NULL) {
|
|
}
|
|
|
|
Element next() const {
|
|
return Element(next_element);
|
|
}
|
|
|
|
Element prev() const {
|
|
return Element(prev_element);
|
|
}
|
|
|
|
Element(const Element &other) :
|
|
list_element(other.list_element),
|
|
prev_element(other.prev_element),
|
|
next_element(other.next_element) {
|
|
}
|
|
|
|
Element &operator=(const Element &other) {
|
|
list_element = other.list_element;
|
|
next_element = other.next_element;
|
|
prev_element = other.prev_element;
|
|
return *this;
|
|
}
|
|
|
|
_FORCE_INLINE_ bool operator==(const Element &p_other) const {
|
|
return this->list_element == p_other.list_element;
|
|
}
|
|
_FORCE_INLINE_ bool operator!=(const Element &p_other) const {
|
|
return this->list_element != p_other.list_element;
|
|
}
|
|
|
|
operator bool() const {
|
|
return (list_element != NULL);
|
|
}
|
|
|
|
const K &key() const {
|
|
CRASH_COND(!list_element);
|
|
return *(list_element->get().first);
|
|
};
|
|
|
|
V &value() {
|
|
CRASH_COND(!list_element);
|
|
return list_element->get().second;
|
|
};
|
|
|
|
const V &value() const {
|
|
CRASH_COND(!list_element);
|
|
return list_element->get().second;
|
|
};
|
|
|
|
V &get() {
|
|
CRASH_COND(!list_element);
|
|
return list_element->get().second;
|
|
};
|
|
|
|
const V &get() const {
|
|
CRASH_COND(!list_element);
|
|
return list_element->get().second;
|
|
};
|
|
};
|
|
|
|
class ConstElement {
|
|
friend class OrderedHashMap<K, V, Hasher, Comparator, MIN_HASH_TABLE_POWER, RELATIONSHIP>;
|
|
|
|
const typename InternalList::Element *list_element;
|
|
|
|
ConstElement(const typename InternalList::Element *p_element) :
|
|
list_element(p_element) {
|
|
}
|
|
|
|
public:
|
|
_FORCE_INLINE_ ConstElement() :
|
|
list_element(NULL) {
|
|
}
|
|
|
|
ConstElement(const ConstElement &other) :
|
|
list_element(other.list_element) {
|
|
}
|
|
|
|
ConstElement &operator=(const ConstElement &other) {
|
|
list_element = other.list_element;
|
|
return *this;
|
|
}
|
|
|
|
ConstElement next() const {
|
|
return ConstElement(list_element ? list_element->next() : NULL);
|
|
}
|
|
|
|
ConstElement prev() const {
|
|
return ConstElement(list_element ? list_element->prev() : NULL);
|
|
}
|
|
|
|
_FORCE_INLINE_ bool operator==(const ConstElement &p_other) const {
|
|
return this->list_element == p_other.list_element;
|
|
}
|
|
_FORCE_INLINE_ bool operator!=(const ConstElement &p_other) const {
|
|
return this->list_element != p_other.list_element;
|
|
}
|
|
|
|
operator bool() const {
|
|
return (list_element != NULL);
|
|
}
|
|
|
|
const K &key() const {
|
|
CRASH_COND(!list_element);
|
|
return *(list_element->get().first);
|
|
};
|
|
|
|
const V &value() const {
|
|
CRASH_COND(!list_element);
|
|
return list_element->get().second;
|
|
};
|
|
|
|
const V &get() const {
|
|
CRASH_COND(!list_element);
|
|
return list_element->get().second;
|
|
};
|
|
};
|
|
|
|
ConstElement find(const K &p_key) const {
|
|
typename InternalList::Element *const *list_element = map.getptr(p_key);
|
|
if (list_element) {
|
|
return ConstElement(*list_element);
|
|
}
|
|
return ConstElement(NULL);
|
|
}
|
|
|
|
Element find(const K &p_key) {
|
|
typename InternalList::Element **list_element = map.getptr(p_key);
|
|
if (list_element) {
|
|
return Element(*list_element);
|
|
}
|
|
return Element(NULL);
|
|
}
|
|
|
|
Element insert(const K &p_key, const V &p_value) {
|
|
typename InternalList::Element **list_element = map.getptr(p_key);
|
|
if (list_element) {
|
|
(*list_element)->get().second = p_value;
|
|
return Element(*list_element);
|
|
}
|
|
typename InternalList::Element *new_element = list.push_back(Pair<const K *, V>(NULL, p_value));
|
|
typename InternalMap::Element *e = map.set(p_key, new_element);
|
|
new_element->get().first = &e->key();
|
|
|
|
return Element(new_element);
|
|
}
|
|
|
|
void erase(Element &p_element) {
|
|
map.erase(p_element.key());
|
|
list.erase(p_element.list_element);
|
|
p_element.list_element = NULL;
|
|
}
|
|
|
|
bool erase(const K &p_key) {
|
|
typename InternalList::Element **list_element = map.getptr(p_key);
|
|
if (list_element) {
|
|
list.erase(*list_element);
|
|
map.erase(p_key);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
inline bool has(const K &p_key) const {
|
|
return map.has(p_key);
|
|
}
|
|
|
|
const V &operator[](const K &p_key) const {
|
|
ConstElement e = find(p_key);
|
|
CRASH_COND(!e);
|
|
return e.value();
|
|
}
|
|
|
|
V &operator[](const K &p_key) {
|
|
Element e = find(p_key);
|
|
if (!e) {
|
|
// consistent with Map behaviour
|
|
e = insert(p_key, V());
|
|
}
|
|
return e.value();
|
|
}
|
|
|
|
inline Element front() {
|
|
return Element(list.front());
|
|
}
|
|
|
|
inline Element back() {
|
|
return Element(list.back());
|
|
}
|
|
|
|
inline ConstElement front() const {
|
|
return ConstElement(list.front());
|
|
}
|
|
|
|
inline ConstElement back() const {
|
|
return ConstElement(list.back());
|
|
}
|
|
|
|
inline bool empty() const { return list.empty(); }
|
|
inline int size() const { return list.size(); }
|
|
|
|
const void *id() const {
|
|
return list.id();
|
|
}
|
|
|
|
void clear() {
|
|
map.clear();
|
|
list.clear();
|
|
}
|
|
|
|
private:
|
|
void _copy_from(const OrderedHashMap &p_map) {
|
|
for (ConstElement E = p_map.front(); E; E = E.next()) {
|
|
insert(E.key(), E.value());
|
|
}
|
|
}
|
|
|
|
public:
|
|
void operator=(const OrderedHashMap &p_map) {
|
|
_copy_from(p_map);
|
|
}
|
|
|
|
OrderedHashMap(const OrderedHashMap &p_map) {
|
|
_copy_from(p_map);
|
|
}
|
|
|
|
_FORCE_INLINE_ OrderedHashMap() {
|
|
}
|
|
};
|
|
|
|
#endif // ORDERED_HASH_MAP_H
|