diff options
Diffstat (limited to 'mazerator.c')
| -rw-r--r-- | mazerator.c | 192 |
1 files changed, 87 insertions, 105 deletions
diff --git a/mazerator.c b/mazerator.c index 9b2e434..f15c4ae 100644 --- a/mazerator.c +++ b/mazerator.c @@ -1,67 +1,26 @@ +#include "stack.h" +#include <ctype.h> +#include <getopt.h> #include <stdio.h> #include <stdlib.h> -#include <getopt.h> -#include <unistd.h> -#include <ctype.h> #include <string.h> +#include <unistd.h> // Error handling -void err(int id){ - switch(id){ - case 0: printf("Error: Stack overflow\nBe kind and report this problem."); break; - case 1: printf("Error: Stack underflow\nBe kind and report this problem."); break; +void err(int id) +{ + switch (id) + { + case 0: + printf("Error: Stack overflow\nBe kind and report this problem."); + break; + case 1: + printf("Error: Stack underflow\nBe kind and report this problem."); + break; } exit(1); } -// The fundementals for the maze-generation algoritm -// A stack data-structure -struct stack -{ - int max_size; - int top; - int *items; -}; - -// Create a new stack -struct stack* new_stack(int capacity) -{ - struct stack *pt = (struct stack*)malloc(sizeof(struct stack)); - pt->max_size = capacity; - pt->top = -1; - pt->items = (int*)malloc(sizeof(int) * capacity); - return pt; -} - -// Add a new item to a stack -void stack_push(struct stack *pt, int x) -{ - // Avoid a overflow by checking if the stack is full - if (pt->top == pt->max_size - 1) - err(0); - // Add an element and increase the top index - pt->items[++pt->top] = x; -} - -// Get the topmost item of a stack -int stack_peek(struct stack *pt) -{ - // Check if the stack is empty - if (pt->top == -1) - err(1); - return pt->items[pt->top]; -} - -// Remove the topmost item of a stack -int stack_pop(struct stack *pt) -{ - // Check for a stack underflow - if (pt->top == -1) - err(0); - // Decrease the stack size by 1 and (optionally) return the popped element - return pt->items[pt->top--]; -} - // Get a position in the maze from coordinates y and x // // This is achieved by concatenating the binary values of the two variables. @@ -71,10 +30,7 @@ int stack_pop(struct stack *pt) // X: 15 00001111 // Will become: // 0000100000001111 -int get_maze_pos(int posY, int posX) -{ - return ((posY) << 8) | posX; -} +int get_maze_pos(int posY, int posX) { return ((posY) << 8) | posX; } // Get y and x coordinates from a position in the maze // @@ -91,46 +47,51 @@ int get_maze_coords(int pos, int *y, int *x) // Find out if a string is a number by running it through // isdigit() char-by-char -int is_number(char * str) +int is_number(char *str) { size_t len = strlen(str); - for(int c = 0; c < len; c++){ - if(!isdigit(str[c])) + for (int c = 0; c < len; c++) + { + if (!isdigit(str[c])) return 0; } return 1; } -// Where the magic happends int main(int argc, char *argv[]) { int maze_width = 40; int maze_heigth = 20; char *wall = "█"; - int seed; + int seed = 0; static struct option options[] = { /* NAME ARGUMENT FLAG SHORTNAME */ - {"width", required_argument, NULL, 'w'}, - {"heigth", required_argument, NULL, 'h'}, - {"wall", required_argument, NULL, 'W'}, - {"seed", required_argument, NULL, 's'}, - {"help", no_argument, NULL, 0}, - {NULL, 0, NULL, 0} - }; - + {"width", required_argument, NULL, 'w'}, + {"heigth", required_argument, NULL, 'h'}, + {"wall", required_argument, NULL, 'W'}, + {"seed", required_argument, NULL, 's'}, + {"help", no_argument, NULL, 0}, + {NULL, 0, NULL, 0}}; + int c; - while((c = getopt_long(argc, argv, "w:h:W:s:", options, NULL)) != -1) { - switch(c){ + while ((c = getopt_long(argc, argv, "w:h:W:s:", options, NULL)) != -1) + { + switch (c) + { case 'w': case 'h': // Set heigth or width - if(is_number(optarg) && atoi(optarg) >= 1 && atoi(optarg) <= 255) - switch(c){ - case 'h': maze_heigth = atoi(optarg); - case 'w': maze_width = atoi(optarg); + if (is_number(optarg) && atoi(optarg) >= 1 && atoi(optarg) <= 255) + switch (c) + { + case 'h': + maze_heigth = atoi(optarg); + case 'w': + maze_width = atoi(optarg); } - else{ + else + { printf("Invalid option argument for -%c!\n", c); exit(1); } @@ -141,17 +102,20 @@ int main(int argc, char *argv[]) break; case 's': // Set the seed - if(is_number(optarg)){ + if (is_number(optarg)) + { seed = atoi(optarg); break; } - else{ + else + { printf("Invalid option argument for -s/--seed!\n"); exit(1); } case 0: // Help - printf("Usage: mazerator [--help] [-W wall] [-s seed] [-w width] [-h heigth]\n\n\ + printf( + "Usage: mazerator [--help] [-W wall] [-s seed] [-w width] [-h heigth]\n\n\ OPTIONS\n\ --width -w The width of the maze. (1-255). Default: 40\n\ --heigth -h The heigth of the maze. (1-255). Default: 20\n\ @@ -165,75 +129,92 @@ OPTIONS\n\ exit(1); } } - + int maze[maze_heigth][maze_width]; char *maze_visual[maze_heigth * 2 + 1][maze_width * 2 + 1]; struct stack *path = new_stack(maze_width * maze_heigth); // Prepares seed value for randr() // Get's a seed from /dev/urandom if not already set - if(seed == 0){ + if (seed == 0) + { + printf("What"); FILE *f = fopen("/dev/urandom", "r"); fread(&seed, sizeof(seed), 1, f); fclose(f); } srand(seed); - + // Prepares the maze grids - // Fills the maze with zeroes indicating that none of the grid squares have been visited + // Fills the maze with zeroes indicating that none of the grid squares have + // been visited // // Fills the visual maze with walls - for(int y = 0; y < sizeof(maze) / sizeof(maze[0]); y++){ - for(int x = 0; x < sizeof(maze[0]) / sizeof(maze[0][0]); x++){ + for (int y = 0; y < sizeof(maze) / sizeof(maze[0]); y++) + { + for (int x = 0; x < sizeof(maze[0]) / sizeof(maze[0][0]); x++) + { maze[y][x] = 0; } } - for(int y = 0; y < sizeof(maze_visual) / sizeof(maze_visual[0]); y++){ - for(int x = 0; x < sizeof(maze_visual[0]) / sizeof(maze_visual[0][0]); x++){ + for (int y = 0; y < sizeof(maze_visual) / sizeof(maze_visual[0]); y++) + { + for (int x = 0; x < sizeof(maze_visual[0]) / sizeof(maze_visual[0][0]); + x++) + { maze_visual[y][x] = wall; } } - + // Set the start value (0, 0) and begin the algoritm loop stack_push(path, 0); int cnt = 0; - while(1){ + while (1) + { int pos = stack_peek(path); int posY, posX; get_maze_coords(pos, &posY, &posX); - - // Set the currently visited grid square to 1 indicating that it has been visited - // and excavate the visual maze + + // Set the currently visited grid square to 1 indicating that it has been + // visited and excavate the visual maze maze[posY][posX] = 1; maze_visual[posY * 2 + 1][posX * 2 + 1] = " "; // Find out available next positions to go to int neighbours[3]; int i = 0; - if(posY != 0 && maze[posY - 1][posX] == 0){ + if (posY != 0 && maze[posY - 1][posX] == 0) + { neighbours[i] = get_maze_pos(posY - 1, posX); i++; - } - if(posY != maze_heigth - 1 && maze[posY + 1][posX] == 0){ + if (posY != maze_heigth - 1 && maze[posY + 1][posX] == 0) + { neighbours[i] = get_maze_pos(posY + 1, posX); i++; } - if(posX != 0 && maze[posY][posX - 1] == 0){ + if (posX != 0 && maze[posY][posX - 1] == 0) + { neighbours[i] = get_maze_pos(posY, posX - 1); i++; } - if(posX != maze_width - 1 && maze[posY][posX + 1] == 0){ + if (posX != maze_width - 1 && maze[posY][posX + 1] == 0) + { neighbours[i] = get_maze_pos(posY, posX + 1); i++; } - switch(i){ + switch (i) + { case 0: // No available next positions - if(cnt == (maze_heigth * maze_width) - 1){ - for(int y = 0; y < sizeof(maze_visual) / sizeof(maze_visual[0]); y++){ - for(int x = 0; x < sizeof(maze_visual[0]) / sizeof(maze_visual[0][0]); x++){ + if (cnt == (maze_heigth * maze_width) - 1) + { + for (int y = 0; y < sizeof(maze_visual) / sizeof(maze_visual[0]); y++) + { + for (int x = 0; + x < sizeof(maze_visual[0]) / sizeof(maze_visual[0][0]); x++) + { printf("%s", maze_visual[y][x]); } printf("\n"); @@ -249,7 +230,8 @@ OPTIONS\n\ int next = neighbours[rand() % i]; int next_y, next_x; get_maze_coords(next, &next_y, &next_x); - maze_visual[posY * 2 - (posY - next_y) + 1][posX * 2 - (posX - next_x) + 1] = " "; + maze_visual[posY * 2 - (posY - next_y) + 1] + [posX * 2 - (posX - next_x) + 1] = " "; stack_push(path, next); } } |