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DynamicArray.h
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DynamicArray.h
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/*
# copyright 2012 by Rolfe Schmidt
This file is part of muCSense.
muCSense is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
muCSense is distributed in the hope that 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 muCSense. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __DYNAMIC_ARRAY_H
#define __DYNAMIC_ARRAY_H
#include <stdlib.h>
template<typename T>
class DynamicArray {
public:
DynamicArray(size_t capacity=4) : _size(0), _capacity(capacity), _data(0) {
_data = reinterpret_cast<T*>(malloc(_capacity*sizeof(T)));
}
~DynamicArray() {
//destroy elements
for(size_t i = 0; i < _size; ++i) {
_data[i].~T();
}
//free memory
free(_data);
}
size_t size() const { return _size; }
size_t capacity() const { return _capacity; }
void reserve(size_t n) {
T* newArray = reinterpret_cast<T*>(malloc(n*sizeof(T)));
//move data into new structures
memcpy(newArray, _data, _capacity*sizeof(T));
//free the old pointers
free(_data);
//set the member variables
_data = newArray;
_capacity = n;
}
const T& operator[](size_t idx) const { return _data[idx%_size]; }
T& operator[](size_t idx) { return _data[idx%_size]; }
void push_back(const T& x) {
if(_size >= _capacity) { grow(); }
_data[_size++] = x;
}
private:
DynamicArray(const DynamicArray& rhs) {} //forbid copying for now
DynamicArray& operator=(const DynamicArray& rhs) { //Do something with _data before making public
this->_size = rhs._size;
this->_capacity = rhs._capacity;
this->_data = rhs._data;
return this;
}
void grow() {reserve(_capacity*2);}
size_t _size;
size_t _capacity;
T* _data;
};
#endif // __DYNAMIC_ARRAY_H