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//
// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#pragma once
#include <stdio.h>
#include <iterator>
/**
* Class Array2d is a data structure that represents a two dimensional array.
* The data is allocated in contiguous memory, arranged row-wise
* and individual elements can be accessed with the () operator.
* For example a two dimensional array D of size (M, N) can be accessed:
*
* _|<------------- col size = N -------->|
* | D(r=0, c=0) D(r=0, c=1)... D(r=0, c=N)
* | D(r=1, c=0) D(r=1, c=1)... D(r=1, c=N)
* | ...
* row size = M ...
* | ...
* _ D(r=M, c=0) D(r=M, c=1)... D(r=M, c=N)
*
*/
template<typename T>
class Array2d
{
private:
size_t m_rows;
size_t m_cols;
T* m_data;
public:
/**
* Creates the array2d with the given sizes.
*
* @param rows number of rows.
* @param cols number of columns.
*/
Array2d(unsigned rows, unsigned cols)
{
if (rows == 0 || cols == 0) {
printf("Array2d constructor has 0 size.\n");
m_data = nullptr;
return;
}
m_rows = rows;
m_cols = cols;
m_data = new T[rows * cols];
}
~Array2d()
{
delete[] m_data;
}
T& operator() (unsigned int row, unsigned int col)
{
return m_data[m_cols * row + col];
}
T operator() (unsigned int row, unsigned int col) const
{
return m_data[m_cols * row + col];
}
/**
* Gets rows number of the current array2d.
* @return number of rows.
*/
size_t size(size_t dim)
{
switch (dim)
{
case 0:
return m_rows;
case 1:
return m_cols;
default:
return 0;
}
}
/**
* Gets the array2d total size.
*/
size_t totalSize()
{
return m_rows * m_cols;
}
/**
* array2d iterator.
*/
using iterator=T*;
using const_iterator=T const*;
iterator begin() { return m_data; }
iterator end() { return m_data + totalSize(); }
const_iterator begin() const { return m_data; }
const_iterator end() const { return m_data + totalSize(); };
};
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