wrenpp/examples/dieroll/main.cpp

/* Copyright 2020-2022, Michele Santullo
 * This file is part of wrenpp.
 *
 * Wrenpp 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.
 *
 * Wrenpp 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 wrenpp.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "wrenpp/vm_fun.hpp"
#include "wrenpp/def_configuration.hpp"
#include "wrenpp/callback_manager.hpp"
#include <iostream>
#include <string>
#include <fstream>
#include <random>
#include <chrono>
#include <thread>

namespace {
	struct CustomData {
		CustomData (std::random_device::result_type r) :
			generator(r),
			distrib(1, 6)
		{
		}

		std::mt19937 generator;
		std::uniform_int_distribution<int> distrib;
	};

	void user_input(wren::VM& vm, wren::ModuleAndName) {
		std::string retval;
		std::cin >> retval;
		set(vm, 0, retval);
	}

	void random_num(wren::VM& vm, wren::ModuleAndName) {
		auto* const cust_data = vm.user_data<CustomData>();
		set(vm, 0, cust_data->distrib(cust_data->generator));
	}

	std::string load_file (const std::string& path) {
		std::ifstream ifs(path);
		ifs >> std::noskipws;

		return std::string(
			std::istreambuf_iterator<char>(ifs),
			std::istreambuf_iterator<char>()
		);
	}
} //unnamed namespace

int main() {
	std::random_device rand_dev;
	CustomData custom_data(rand_dev());

	wren::DefConfiguration config;
	wren::VM vm(&config, &custom_data);
	vm.callback_manager().add_callback(true, "main", "Game", "user_input()", [](){return &user_input;})
		.add_callback(true, "main", "Game", "random()", [](){return &random_num;});

	interpret(vm, "main", load_file("main.wren"));
	wren::call<void>(vm, wren::MN<"main", "the_game">, "play_game");

	std::this_thread::sleep_for(std::chrono::milliseconds(1000));
	return 0;
}