Created the cursor object, and it moves!

lib/cursor.c

@@ -0,0 +1,102 @@
+#include <ncurses.h>
+#include <malloc.h>
+#include "stack.h"
+#include "deck.h"
+#include "display.h"
+#include "game.h"
+#include "cursor.h"
+
+void allocate_cursor(struct cursor **cursor) {
+  *cursor = malloc(sizeof(**cursor));
+
+  return;
+}
+
+void initialize_cursor(struct cursor *cursor) {
+  cursor->x = CURSOR_STARTING_X;
+  cursor->y = CURSOR_STARTING_Y;
+
+  return;
+}
+
+void draw_cursor(struct cursor *cursor) {
+  mvaddch(cursor->y, cursor->x, '*');
+
+  return;
+}
+
+void erase_cursor(struct cursor *cursor) {
+  mvdelch(cursor->y, cursor->x);
+
+  return;
+}
+
+void move_cursor(struct cursor *cursor, enum movement movement) {
+  switch (movement) {
+    case LEFT:
+      if (cursor->x > CURSOR_STARTING_X) {
+        erase_cursor(cursor);
+        cursor->x = cursor->x - 8;
+        if (cursor->y > CURSOR_STARTING_Y) {
+          move_cursor(cursor, UP);
+          move_cursor(cursor, DOWN);
+        }
+        draw_cursor(cursor);
+      }
+      break;
+    case DOWN:
+      if (cursor->y == CURSOR_STARTING_Y) {
+        erase_cursor(cursor);
+        switch (cursor->x - 3) {
+          case MANEUVRE_0_STARTING_X:
+            cursor->y = cursor->y + 7 + length(deck->maneuvre_0);
+            break;
+          case MANEUVRE_1_STARTING_X:
+            cursor->y = cursor->y + 7 + length(deck->maneuvre_1);
+            break;
+          case MANEUVRE_2_STARTING_X:
+            cursor->y = cursor->y + 7 + length(deck->maneuvre_2);
+            break;
+          case MANEUVRE_3_STARTING_X:
+            cursor->y = cursor->y + 7 + length(deck->maneuvre_3);
+            break;
+          case MANEUVRE_4_STARTING_X:
+            cursor->y = cursor->y + 7 + length(deck->maneuvre_4);
+            break;
+          case MANEUVRE_5_STARTING_X:
+            cursor->y = cursor->y + 7 + length(deck->maneuvre_5);
+            break;
+          case MANEUVRE_6_STARTING_X:
+            cursor->y = cursor->y + 7 + length(deck->maneuvre_6);
+            break;
+        }
+        draw_cursor(cursor);
+      }
+      break;
+    case RIGHT:
+      if (cursor->x < 49) {
+        erase_cursor(cursor);
+        cursor->x = cursor->x + 8;
+        if (cursor->y > CURSOR_STARTING_Y) {
+          move_cursor(cursor, UP);
+          move_cursor(cursor, DOWN);
+        }
+        draw_cursor(cursor);
+      }
+      break;
+    case UP:
+      if (cursor->y > 1) {
+        erase_cursor(cursor);
+        cursor->y = CURSOR_STARTING_Y;
+        draw_cursor(cursor);
+      }
+      break;
+  }
+
+  /* this is needed because of the screen glitch that moving the cursor
+   * on the maneuvre's stacks causes */
+  refresh();
+  draw_game(deck);
+
+  return;
+}

lib/cursor.h

@@ -0,0 +1,21 @@
+#ifndef CURSOR_H
+#define CURSOR_H
+
+#define CURSOR_STARTING_X 4
+#define CURSOR_STARTING_Y 7
+
+struct cursor {
+  int x;
+  int y;
+};
+
+enum movement { LEFT, DOWN, UP, RIGHT };
+
+extern struct deck *deck;
+
+void allocate_cursor(struct cursor **);
+void initialize_cursor(struct cursor *);
+void draw_cursor(struct cursor *);
+void move_cursor(struct cursor *, enum movement);
+
+#endif

lib/game.c

@@ -208,8 +208,6 @@ void prepare_game(struct deck **deck) {
 }
 
 void initialize_game() {
-  struct deck *deck = NULL;
-
   clear_screen();
   prepare_game(&deck);
   draw_game(deck);

lib/game.h

@@ -26,6 +26,8 @@
 #define MANEUVRE_5_STARTING_X   41
 #define MANEUVRE_6_STARTING_X   49
 
+struct deck *deck;
+
 void set_stacks_coordinates(struct deck *);
 void fill_deck(struct deck *);
 void shuffle_deck(struct deck *);