basic tui rendering

2048.c

@@ -1,4 +1,19 @@
 #include "2048.h"
+#include <stdlib.h>
+#include <time.h>
+
+void game_add_block(Game game) {
+    start:
+    size_t x, y;
+    int value;
+    x = rand() % game.field_size; 
+    y = rand() % game.field_size;
+    value = (rand() % 2) + 1;
+    if(game.field[x][y] != 0)
+        game.field[x][y] = value * 2;
+    else
+        goto start;
+}
 
 Game game_init(size_t field_size) {
     Game game;
@@ -8,6 +23,10 @@ Game game_init(size_t field_size) {
     for (size_t i = 0; i < field_size; i++) {
         game.field[i] = calloc(field_size, sizeof(uint16_t) * field_size);
     }
+
+    time_t t;
+    srand((unsigned) time(&t));
+    game_add_block(game);
     return game;
 }
 

2048.h

@@ -5,10 +5,11 @@
 #define HEADER_2048
 
 typedef enum Direction {
-    up,
-    down,
-    right,
-    left
+    NoDirection,
+    Up,
+    Down,
+    Right,
+    Left
 } Direction;
 
 typedef struct Game

tui.c

@@ -2,6 +2,9 @@
 #include <stdio.h>
 #include <curses.h>
 
+const space_between_cells_x = 6;
+const space_between_cells_y = 2;
+
 // entering and leaving screen using ANSI escape sequence
 void tui_init() {
     initscr(); 
@@ -16,10 +19,39 @@ void tui_destroy() {}
 void tui_loop(Game *game) {
     while(true){
         char input = getch();
-        // up - 3, 107, 56
-        // down - 2, 106, 50
-        // left - 4, 104, 52 
-        // right - 5, 108, 54
-        // fprintf(stderr, "%d", input);
+        Direction dir = NoDirection;
+        // these are not magic numbers
+        // these are just codes for arrows,
+        // numpad and Vim bindings
+        switch (input) {
+            case 3:
+            case 107:
+            case 56:
+                dir = Up;
+                break;
+            case 2:
+            case 106:
+            case 50:
+                dir = Down;
+                break;
+            case 4:
+            case 104:
+            case 52:
+                dir = Left;
+                break;
+            case 5:
+            case 108:
+            case 54:
+                dir = Right;
+                break;
+        }
+        game_move(game, dir);
+
+        // printing the game state is fun
+        for (size_t i = 0; i < game->field_size; i++) {
+            for (size_t j = 0; j < game->field_size; j++) {
+                mvprintw(i * space_between_cells_y, j * space_between_cells_x, "%d", game->field[i][j]);
+            }
+        }
     }
 }