godot/core/dictionary.cpp

293 lines
7.9 KiB
C++

/*************************************************************************/
/* dictionary.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 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. */
/*************************************************************************/
#include "dictionary.h"
#include "safe_refcount.h"
#include "variant.h"
struct _DictionaryVariantHash {
static _FORCE_INLINE_ uint32_t hash(const Variant &p_variant) { return p_variant.hash(); }
};
struct DictionaryPrivate {
struct Data {
Variant variant;
int order;
};
SafeRefCount refcount;
HashMap<Variant, Data, _DictionaryVariantHash> variant_map;
int counter;
};
struct DictionaryPrivateSort {
bool operator()(const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair *A, const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair *B) const {
return A->data.order < B->data.order;
}
};
void Dictionary::get_key_list(List<Variant> *p_keys) const {
if (_p->variant_map.empty())
return;
int count = _p->variant_map.size();
const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair **pairs = (const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair **)alloca(count * sizeof(HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair *));
_p->variant_map.get_key_value_ptr_array(pairs);
SortArray<const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair *, DictionaryPrivateSort> sort;
sort.sort(pairs, count);
for (int i = 0; i < count; i++) {
p_keys->push_back(pairs[i]->key);
}
}
Variant &Dictionary::operator[](const Variant &p_key) {
DictionaryPrivate::Data *v = _p->variant_map.getptr(p_key);
if (!v) {
DictionaryPrivate::Data d;
d.order = _p->counter++;
_p->variant_map[p_key] = d;
v = _p->variant_map.getptr(p_key);
}
return v->variant;
}
const Variant &Dictionary::operator[](const Variant &p_key) const {
return _p->variant_map[p_key].variant;
}
const Variant *Dictionary::getptr(const Variant &p_key) const {
const DictionaryPrivate::Data *v = _p->variant_map.getptr(p_key);
if (!v)
return NULL;
else
return &v->variant;
}
Variant *Dictionary::getptr(const Variant &p_key) {
DictionaryPrivate::Data *v = _p->variant_map.getptr(p_key);
if (!v)
return NULL;
else
return &v->variant;
}
Variant Dictionary::get_valid(const Variant &p_key) const {
DictionaryPrivate::Data *v = _p->variant_map.getptr(p_key);
if (!v)
return Variant();
else
return v->variant;
}
int Dictionary::size() const {
return _p->variant_map.size();
}
bool Dictionary::empty() const {
return !_p->variant_map.size();
}
bool Dictionary::has(const Variant &p_key) const {
return _p->variant_map.has(p_key);
}
bool Dictionary::has_all(const Array &p_keys) const {
for (int i = 0; i < p_keys.size(); i++) {
if (!has(p_keys[i])) {
return false;
}
}
return true;
}
void Dictionary::erase(const Variant &p_key) {
_p->variant_map.erase(p_key);
}
bool Dictionary::operator==(const Dictionary &p_dictionary) const {
return _p == p_dictionary._p;
}
void Dictionary::_ref(const Dictionary &p_from) const {
//make a copy first (thread safe)
if (!p_from._p->refcount.ref())
return; // couldn't copy
//if this is the same, unreference the other one
if (p_from._p == _p) {
_p->refcount.unref();
return;
}
if (_p)
_unref();
_p = p_from._p;
}
void Dictionary::clear() {
_p->variant_map.clear();
_p->counter = 0;
}
void Dictionary::_unref() const {
ERR_FAIL_COND(!_p);
if (_p->refcount.unref()) {
memdelete(_p);
}
_p = NULL;
}
uint32_t Dictionary::hash() const {
uint32_t h = hash_djb2_one_32(Variant::DICTIONARY);
List<Variant> keys;
get_key_list(&keys);
for (List<Variant>::Element *E = keys.front(); E; E = E->next()) {
h = hash_djb2_one_32(E->get().hash(), h);
h = hash_djb2_one_32(operator[](E->get()).hash(), h);
}
return h;
}
Array Dictionary::keys() const {
#if 0
Array karr;
karr.resize(size());
const Variant *K = NULL;
int idx = 0;
while ((K = next(K))) {
karr[idx++] = (*K);
}
return karr;
#else
Array varr;
varr.resize(size());
if (_p->variant_map.empty())
return varr;
int count = _p->variant_map.size();
const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair **pairs = (const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair **)alloca(count * sizeof(HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair *));
_p->variant_map.get_key_value_ptr_array(pairs);
SortArray<const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair *, DictionaryPrivateSort> sort;
sort.sort(pairs, count);
for (int i = 0; i < count; i++) {
varr[i] = pairs[i]->key;
}
return varr;
#endif
}
Array Dictionary::values() const {
Array varr;
varr.resize(size());
if (_p->variant_map.empty())
return varr;
int count = _p->variant_map.size();
const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair **pairs = (const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair **)alloca(count * sizeof(HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair *));
_p->variant_map.get_key_value_ptr_array(pairs);
SortArray<const HashMap<Variant, DictionaryPrivate::Data, _DictionaryVariantHash>::Pair *, DictionaryPrivateSort> sort;
sort.sort(pairs, count);
for (int i = 0; i < count; i++) {
varr[i] = pairs[i]->data.variant;
}
return varr;
}
const Variant *Dictionary::next(const Variant *p_key) const {
return _p->variant_map.next(p_key);
}
Dictionary Dictionary::copy() const {
Dictionary n;
List<Variant> keys;
get_key_list(&keys);
for (List<Variant>::Element *E = keys.front(); E; E = E->next()) {
n[E->get()] = operator[](E->get());
}
return n;
}
void Dictionary::operator=(const Dictionary &p_dictionary) {
_ref(p_dictionary);
}
Dictionary::Dictionary(const Dictionary &p_from) {
_p = NULL;
_ref(p_from);
}
Dictionary::Dictionary() {
_p = memnew(DictionaryPrivate);
_p->refcount.init();
_p->counter = 0;
}
Dictionary::~Dictionary() {
_unref();
}