Array.hpp
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/****************************************************************************
*
* Copyright (c) 2016 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#pragma once
#include <stdlib.h>
namespace px4
{
template <class T, size_t N>
class Array
{
public:
bool push_back(const T &x)
{
if (_size == N) {
_overflow = true;
return false;
} else {
_items[_size] = x;
++_size;
return true;
}
}
void remove(unsigned idx)
{
if (idx < _size) {
--_size;
for (unsigned i = idx; i < _size; ++i) {
_items[i] = _items[i + 1];
}
}
}
void erase(T *item)
{
if (item - _items < static_cast<int>(_size)) {
--_size;
for (T *it = item; it != &_items[_size]; ++it) {
*it = *(it + 1);
}
}
}
T &operator[](size_t n) { return _items[n]; }
const T &operator[](size_t n) const { return _items[n]; }
T &at(size_t n) { return _items[n]; }
const T &at(size_t n) const { return _items[n]; }
size_t size() const { return _size; }
size_t max_size() const { return N; }
size_t capacity() const { return N; }
bool empty() const { return _size == 0; }
bool is_overflowed() { return _overflow; }
T *begin() { return &_items[0]; }
T *end() { return &_items[_size]; }
const T *begin() const { return &_items[0]; }
const T *end() const { return &_items[_size]; }
private:
T _items[N];
size_t _size{0};
bool _overflow{false};
};
}