bindings/cxx/examples/gpiosetcxx.cpp

// SPDX-License-Identifier: LGPL-2.1-or-later
// SPDX-FileCopyrightText: 2017-2021 Bartosz Golaszewski <bartekgola@gmail.com>

/* Simplified C++ reimplementation of the gpioset tool. */

#include <gpiod.hpp>

#include <cstdlib>
#include <iostream>

int main(int argc, char **argv)
{
	if (argc < 3) {
		::std::cerr << "usage: " << argv[0] << " <chip> <line_offset0>=<value0> ..." << ::std::endl;
		return EXIT_FAILURE;
	}

	::std::vector<unsigned int> offsets;
	::std::vector<int> values;

	for (int i = 2; i < argc; i++) {
		::std::string arg(argv[i]);

		size_t pos = arg.find('=');

		::std::string offset(arg.substr(0, pos));
		::std::string value(arg.substr(pos + 1, ::std::string::npos));

		if (offset.empty() || value.empty())
			throw ::std::invalid_argument("invalid argument: " + ::std::string(argv[i]));

		offsets.push_back(::std::stoul(offset));
		values.push_back(::std::stoul(value));
	}

	::gpiod::chip chip(argv[1]);
	auto lines = chip.get_lines(offsets);

	lines.request({
		argv[0],
		::gpiod::line_request::DIRECTION_OUTPUT,
		0
	}, values);

	::std::cin.get();

	return EXIT_SUCCESS;
}