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#include "getopt.h"
#include "matrix.hpp"
#include "maze.hpp"
#include "utils.hpp"
#include "vector2.hpp"
#include <iostream>
#include <memory>
#include <random>
#include <string>
void optarg_error(char arg, std::string error)
{
std::cout << "Error: Invalid option argument for -" << arg << ". " << error
<< std::endl;
exit(EXIT_FAILURE);
}
void validate_start_coords(unsigned int start_x, unsigned int start_y, unsigned int width,
unsigned int height)
{
if (start_x >= width)
throw "The x start coordinate cannot be higher than or equal to the maze's width";
if (start_y >= height)
throw "The y start coordinate cannot be higher than or equal to the maze's "
"height";
}
/**
* Parses a unsigned integer command-line argument.
*
* @param num_dst A pointer to a place to store the result value
* @param arg The command-line argument character
* @param check_zero Whether or not to make sure that the result is not zero
*/
void parse_uint_arg(unsigned int *num_dst, char arg, bool check_zero = false)
{
try
{
*num_dst = str_to_uint(std::string(optarg));
if (check_zero && *num_dst == 0)
throw "It should not be 0";
}
catch (const char *error)
{
optarg_error(arg, std::string(error));
}
}
const struct option options[] = {{"width", required_argument, NULL, 'w'},
{"height", required_argument, NULL, 'h'},
{"wall", required_argument, NULL, 'W'},
{"seed", required_argument, NULL, 's'},
{"start-x", required_argument, NULL, 'x'},
{"start-y", required_argument, NULL, 'y'},
{"help", no_argument, NULL, 0},
{NULL, 0, NULL, 0}};
int main(int argc, char *argv[])
{
unsigned int maze_width = 40U;
unsigned int maze_height = 20U;
std::shared_ptr<unsigned int> start_x = nullptr;
std::shared_ptr<unsigned int> start_y = nullptr;
std::unique_ptr<std::mt19937> random_gen = nullptr;
std::string wall = "█";
int arg;
while ((arg = getopt_long(argc, argv, "w:h:W:s:x:y:", options, nullptr)) != -1)
{
switch (arg)
{
case 'w':
parse_uint_arg(&maze_width, arg, true);
break;
case 'h':
parse_uint_arg(&maze_height, arg, true);
break;
case 'x':
start_x = std::make_shared<unsigned int>();
parse_uint_arg(start_x.get(), arg);
break;
case 'y':
start_y = std::make_shared<unsigned int>();
parse_uint_arg(start_y.get(), arg);
break;
case 'W':
wall = optarg;
break;
case 's':
unsigned int seed;
parse_uint_arg(&seed, arg, true);
random_gen = std::make_unique<std::mt19937>(seed);
break;
case 0:
std::cout
<< "Usage: " << argv[0]
<< " [OPTION]...\n\n"
"Options:\n"
" -w, --width WIDTH The width of the maze (Default: 40)\n"
" -h, --height HEIGHT The height of the maze (Default: 20)\n"
" -x, --start-x X The x coordinate for the start "
"position "
"(Default: random)\n"
" -y, --start-y Y The y coordinate for the start "
"position "
"(Default: random)\n"
" -W, --wall WALL Single character used as maze walls "
"(Default: '█')\n"
" -s, --seed SEED The randomization seed used for maze "
"generation\n"
" --help Displays usage information"
<< std::endl;
return EXIT_SUCCESS;
case '?':
std::cout << "\nTry '" << argv[0] << " --help' for more information"
<< std::endl;
return EXIT_FAILURE;
}
}
if (random_gen == nullptr)
{
std::random_device random_device;
random_gen = std::make_unique<std::mt19937>(random_device());
}
if (start_x == nullptr)
{
auto random_dist =
std::uniform_int_distribution<unsigned int>(0, maze_width - 1U);
start_x = std::make_unique<unsigned int>(random_dist(*random_gen));
}
if (start_y == nullptr)
{
auto random_dist =
std::uniform_int_distribution<unsigned int>(0, maze_height - 1U);
start_y = std::make_unique<unsigned int>(random_dist(*random_gen));
}
try
{
validate_start_coords(*start_x, *start_y, maze_width, maze_height);
}
catch (const char *error)
{
std::cout << "Error: " << error << std::endl;
return EXIT_FAILURE;
}
Matrix<std::string> matrix(maze_height * 2U + 1U, maze_width * 2U + 1U);
matrix.fill(wall);
auto start_pos = std::make_shared<Vector2>(*start_x * 2U + 1U, *start_y * 2U + 1U);
matrix_to_maze<std::string>(&matrix, start_pos, " ", *random_gen);
matrix.print();
}
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