testing stuff

Makefile

@@ -0,0 +1,4 @@
+all: drunkard main
+
+main: main.c
+	$(CC) main.c -lcurses -o main

drunkard.c

@@ -0,0 +1,77 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#define HEIGHT      50
+#define WIDTH       50
+#define MAX_STEPS   50
+#define NUM_WALKERS 100
+
+enum direction {
+    UP,
+    LEFT,
+    RIGHT,
+    DOWN,
+    NUM_DIRS,
+};
+
+struct point {
+    int x;
+    int y;
+};
+
+int main(void)
+{
+    bool map[HEIGHT][WIDTH];
+    for (int i = 0; i < HEIGHT; ++i) {
+        for (int j = 0; j < WIDTH; ++j) {
+            map[i][j] = false;
+        }
+    }
+
+    int start_x = WIDTH / 2;
+    int start_y = HEIGHT / 2;
+
+    int          open_tiles = 1;
+    struct point open[HEIGHT * WIDTH];
+    struct point p = {.x = start_x, .y = start_y};
+    open[0]        = p;
+
+    srand(time(NULL));
+
+    for (int i = 0; i < NUM_WALKERS; ++i) {
+        struct point curr_point = open[rand() % open_tiles];
+        int          x_pos      = curr_point.x;
+        int          y_pos      = curr_point.y;
+
+        for (int j = 0; j < MAX_STEPS && x_pos < WIDTH && x_pos >= 0 &&
+                        y_pos < HEIGHT && y_pos >= 0;
+             ++j) {
+            if (!map[y_pos][x_pos]) {
+                map[y_pos][x_pos]  = true;
+                struct point p     = {.x = x_pos, .y = y_pos};
+                open[open_tiles++] = p;
+            }
+            enum direction dir = rand() % NUM_DIRS;
+            switch (dir) {
+            case UP : --y_pos; break;
+            case LEFT : --x_pos; break;
+            case RIGHT : ++x_pos; break;
+            case DOWN : ++y_pos; break;
+            default : exit(EXIT_FAILURE); // should not occur
+            }
+        }
+    }
+
+    for (int i = 0; i < HEIGHT; ++i) {
+        for (int j = 0; j < WIDTH; ++j) {
+            if (map[i][j]) {
+                printf("#");
+            } else {
+                printf(".");
+            }
+        }
+        printf("\n");
+    }
+}

main.c

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+#include <curses.h>
+#include <stdlib.h>
+
+#define MAIN_PANEL_WIDTH         100
+#define MAIN_PANEL_HEIGHT        41
+#define INSTRUCTION_PANEL_WIDTH  32
+#define INSTRUCTION_PANEL_HEIGHT 43
+#define MESSAGE_PANEL_WIDTH      100
+#define MESSAGE_PANEL_HEIGHT     3
+
+WINDOW *create_newwin(int height, int width, int starty, int startx)
+{
+    WINDOW *local_win = newwin(height, width, starty, startx);
+    box(local_win, 0, 0);
+    wrefresh(local_win);
+
+    return local_win;
+}
+
+void destroy_win(WINDOW *local_win)
+{
+    wborder(local_win, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ');
+    wrefresh(local_win);
+    delwin(local_win);
+}
+
+int main(void)
+{
+    initscr(); // initialize curses
+
+    // exit on unsupported consoles
+    if (LINES < INSTRUCTION_PANEL_HEIGHT ||
+        COLS < MAIN_PANEL_WIDTH + INSTRUCTION_PANEL_WIDTH || !has_colors()) {
+        endwin();
+        fprintf(
+            stderr,
+            "a color terminal is required with at least %dx%d characters\n",
+            INSTRUCTION_PANEL_WIDTH + MAIN_PANEL_WIDTH, INSTRUCTION_PANEL_HEIGHT
+        );
+        exit(1);
+    }
+
+    // configure curses if startup was successful
+    raw();                // disable line buffering
+    keypad(stdscr, TRUE); // enable reading function keys
+    noecho();             // don't print input
+    curs_set(0);          // disable the cursor
+    start_color();        // enable colours
+
+    int starty = 12;
+    int startx = 40;
+    init_pair(1, COLOR_WHITE, COLOR_BLACK);
+    wattron(stdscr, COLOR_PAIR(1));
+    refresh();
+
+    // create the windows
+    WINDOW *inst = create_newwin(
+        INSTRUCTION_PANEL_HEIGHT, INSTRUCTION_PANEL_WIDTH,
+        (LINES - INSTRUCTION_PANEL_HEIGHT) / 2,
+        (COLS - MAIN_PANEL_WIDTH - INSTRUCTION_PANEL_WIDTH) / 2 +
+            MAIN_PANEL_WIDTH - 1
+    );
+    WINDOW *msgs = create_newwin(
+        MESSAGE_PANEL_HEIGHT, MESSAGE_PANEL_WIDTH,
+        (LINES - MAIN_PANEL_HEIGHT - MESSAGE_PANEL_HEIGHT) / 2 +
+            MAIN_PANEL_HEIGHT,
+        (COLS - MESSAGE_PANEL_WIDTH - INSTRUCTION_PANEL_WIDTH) / 2
+    );
+    WINDOW *main_win = create_newwin(
+        MAIN_PANEL_HEIGHT, MAIN_PANEL_WIDTH,
+        (LINES - MAIN_PANEL_HEIGHT - MESSAGE_PANEL_HEIGHT) / 2 + 1,
+        (COLS - MAIN_PANEL_WIDTH - INSTRUCTION_PANEL_WIDTH) / 2
+    );
+
+    mvwprintw(inst, 1, 2, "h - move left");
+    mvwprintw(inst, 2, 2, "j - move down");
+    mvwprintw(inst, 3, 2, "k - move up");
+    mvwprintw(inst, 4, 2, "l - move right");
+    wrefresh(inst);
+
+    mvwprintw(msgs, 1, 1, "TODO: put messages here");
+    wrefresh(msgs);
+
+    wattron(main_win, COLOR_PAIR(1));
+    mvwaddch(main_win, starty, startx, '@');
+    wrefresh(main_win);
+
+    int ch;
+    while ((ch = getch()) != KEY_F(1)) {
+        switch (ch) {
+        case 'k' :
+            if (starty > 1) {
+                mvwaddch(main_win, starty, startx, ' ');
+                mvwaddch(main_win, --starty, startx, '@');
+            }
+            break;
+        case 'j' :
+            if (starty < MAIN_PANEL_HEIGHT - 2) {
+                mvwaddch(main_win, starty, startx, ' ');
+                mvwaddch(main_win, ++starty, startx, '@');
+            }
+            break;
+        case 'h' :
+            if (startx > 1) {
+                mvwaddch(main_win, starty, startx, ' ');
+                mvwaddch(main_win, starty, --startx, '@');
+            }
+            break;
+        case 'l' :
+            if (startx < MAIN_PANEL_WIDTH - 2) {
+                mvwaddch(main_win, starty, startx, ' ');
+                mvwaddch(main_win, starty, ++startx, '@');
+            }
+            break;
+        }
+        wrefresh(main_win);
+    }
+
+    endwin();
+
+    return 0;
+}