mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-18 17:11:23 +00:00
131 lines
4.2 KiB
C++
131 lines
4.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
#include <vapours/common.hpp>
|
|
#include <vapours/assert.hpp>
|
|
#include <vapours/util/util_typed_storage.hpp>
|
|
|
|
namespace ams::util {
|
|
|
|
template<class Key, class Value, size_t N>
|
|
class BoundedMap {
|
|
private:
|
|
std::array<std::optional<Key>, N> keys;
|
|
std::array<TYPED_STORAGE(Value), N> values;
|
|
private:
|
|
ALWAYS_INLINE void FreeEntry(size_t i) {
|
|
this->keys[i].reset();
|
|
GetReference(this->values[i]).~Value();
|
|
}
|
|
public:
|
|
constexpr BoundedMap() : keys(), values() { /* ... */ }
|
|
|
|
Value *Find(const Key &key) {
|
|
for (size_t i = 0; i < N; i++) {
|
|
if (this->keys[i] && this->keys[i].value() == key) {
|
|
return GetPointer(this->values[i]);
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void Remove(const Key &key) {
|
|
for (size_t i = 0; i < N; i++) {
|
|
if (this->keys[i] && this->keys[i].value() == key) {
|
|
this->FreeEntry(i);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void RemoveAll() {
|
|
for (size_t i = 0; i < N; i++) {
|
|
this->FreeEntry(i);
|
|
}
|
|
}
|
|
|
|
bool IsFull() {
|
|
for (size_t i = 0; i < N; i++) {
|
|
if (!this->keys[i]) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Insert(const Key &key, Value &&value) {
|
|
/* We can't insert if the key is used. */
|
|
if (this->Find(key) != nullptr) {
|
|
return false;
|
|
}
|
|
|
|
/* Find a free value. */
|
|
for (size_t i = 0; i < N; i++) {
|
|
if (!this->keys[i]) {
|
|
this->keys[i] = key;
|
|
new (GetPointer(this->values[i])) Value(std::move(value));
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool InsertOrAssign(const Key &key, Value &&value) {
|
|
/* Try to find and assign an existing value. */
|
|
for (size_t i = 0; i < N; i++) {
|
|
if (this->keys[i] && this->keys[i].value() == key) {
|
|
GetReference(this->values[i]) = std::move(value);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/* Find a free value. */
|
|
for (size_t i = 0; i < N; i++) {
|
|
if (!this->keys[i]) {
|
|
this->keys[i] = key;
|
|
new (GetPointer(this->values[i])) Value(std::move(value));
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
template<class... Args>
|
|
bool Emplace(const Key &key, Args&&... args) {
|
|
/* We can't emplace if the key is used. */
|
|
if (this->Find(key) != nullptr) {
|
|
return false;
|
|
}
|
|
|
|
/* Find a free value. */
|
|
for (size_t i = 0; i < N; i++) {
|
|
if (!this->keys[i]) {
|
|
this->keys[i] = key;
|
|
new (GetPointer(this->values[i])) Value(std::forward<Args>(args)...);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
};
|
|
|
|
}
|