Split into .h files

1 files changed, 47 insertions, 0 deletions

diff --git a/src/moves.h b/src/moves.h
new file mode 100644
index 0000000..7da6405
--- /dev/null
+++ b/src/moves.h
@@ -0,0 +1,47 @@
+_static_inline bool allowednextmove(uint8_t *, uint8_t);
+_static_inline uint8_t inverse_trans(uint8_t);
+_static_inline uint8_t movebase(uint8_t);
+_static_inline uint8_t moveaxis(uint8_t);
+
+_static bool
+allowednextmove(uint8_t *moves, uint8_t n)
+{
+        uint8_t base[3], axis[3];
+
+        if (n < 2)
+                return true;
+
+        base[0] = movebase(moves[n-1]);
+        axis[0] = moveaxis(moves[n-1]);
+        base[1] = movebase(moves[n-2]);
+        axis[1] = moveaxis(moves[n-2]);
+
+        if (base[0] == base[1] || (axis[0] == axis[1] && base[0] < base[1]))
+                return false;
+
+        if (n == 2)
+                return true;
+
+        base[2] = movebase(moves[n-3]);
+        axis[2] = moveaxis(moves[n-3]);
+
+        return axis[1] != axis[2] || base[0] != base[2];
+}
+
+_static_inline uint8_t
+inverse_trans(uint8_t t)
+{
+        return inverse_trans_table[t];
+}
+
+_static_inline uint8_t
+movebase(uint8_t move)
+{
+        return move / 3;
+}
+
+_static_inline uint8_t
+moveaxis(uint8_t move)
+{
+        return move / 6;
+}