From ef40bc1fd40c32229738bfc8e60748802ca24c86 Mon Sep 17 00:00:00 2001
From: Gabriel Tofvesson <gabto095@student.liu.se>
Date: Thu, 27 Feb 2020 20:56:48 +0100
Subject: [PATCH] Define simple gamestate structures

---
 board.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 board.h

diff --git a/board.h b/board.h
new file mode 100644
index 0000000..b8a6d52
--- /dev/null
+++ b/board.h
@@ -0,0 +1,30 @@
+/**
+ * Sudoku board header file
+ *
+ * Created by Gabriel Tofvesson
+ */
+
+
+
+/**
+ * Simple definition of a board element. Vaild values range: 0-8
+ */
+struct board_element {
+  unsigned char has_value : 1;        /* Whether element has a decided value */
+
+  union {
+    unsigned char  value     : 4;     /* Value of element */
+    unsigned short potential : 9;     /* Bitfield of possible values */
+  };
+};
+
+/**
+ * Board structure representing the state of a Sudoku game
+ * Complexity describes 
+ *
+ * TODO: Replace elements with packed structure
+ */
+struct board {
+  struct board_element elements[81];  /* Game board */
+  unsigned char complexity;           /* Complexity of simplest element */
+};