duckhandy/include/duckhandy/version_bt.hpp

/* Copyright 2016-2021 Michele Santullo
 * This file is part of "duckhandy".
 *
 * "duckhandy" 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.
 *
 * "duckhandy" 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 "duckhandy".  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef id5594416333AA4792BFEC94E863E03B08
#define id5594416333AA4792BFEC94E863E03B08

#include "int_conv.hpp"
#include <cstddef>
#include <stdexcept>

namespace dhandy::bt {

template <std::size_t N>
class Version {
public:
	constexpr static const std::size_t count = N;

	constexpr Version (const char* const ver, bool accept_less=false);

	constexpr unsigned int operator[] (std::size_t idx) const;
	constexpr unsigned int major() const;
	constexpr unsigned int minor() const;
	constexpr unsigned int revision() const;

private:
	unsigned int m_versions[N];
};

template <std::size_t N>
inline constexpr Version<N>::Version (const char* const ver, bool accept_less) :
	m_versions{0}
{
	std::size_t z = 0;
	std::size_t s = 0;
	std::size_t idx = 0;
	bool commit = false;

	do {
		if (ver[z] >= '0' and ver[z] <= '9') {
			commit = true;
		}
		else if (commit) {
			commit = false;
			m_versions[idx++] = dhandy::ary_to_int<unsigned int>(ver + s, ver + z);
			s = z + 1;
		}
		else {
			s = z + 1;
		}
	} while(ver[z++] and idx < N);

	if (not accept_less and idx < N)
		throw std::invalid_argument("Input version doesn't contain enough version numbers");
}

template <std::size_t N>
inline constexpr unsigned int Version<N>::operator[] (std::size_t idx) const {
	if (idx < N)
		return m_versions[idx];
	else
		throw std::out_of_range("Index is out of range");
}

template <std::size_t N>
inline constexpr unsigned int Version<N>::major() const {
	return m_versions[0];
}

template <std::size_t N>
inline constexpr unsigned int Version<N>::minor() const {
	if constexpr (N > 1)
		return m_versions[1];
	else
		throw std::out_of_range("Not enough version entries, there is no minor number");
}

template <std::size_t N>
inline constexpr unsigned int Version<N>::revision() const {
	if constexpr (N > 2)
		return m_versions[2];
	else
		throw std::out_of_range("Not enough version entries, there is no revision number");
}

} //namespace dhandy::bt

#endif