1 files changed, 40 insertions, 0 deletions

diff --git a/src/core/transform.h b/src/core/transform.h
index 73636fe..f956718 100644
--- a/src/core/transform.h
+++ b/src/core/transform.h
@@ -21,6 +21,9 @@ STATIC cube_t transform_edges(cube_t, uint8_t);
 STATIC cube_t transform_corners(cube_t, uint8_t);
 STATIC cube_t transform(cube_t, uint8_t);
 STATIC cube_t applytrans(cube_t, const char *);
+STATIC_INLINE uint8_t inverse_trans(uint8_t);
+STATIC uint8_t transform_move(uint8_t, uint8_t);
+STATIC uint64_t symmetry_mask(cube_t);
 
 STATIC cube_t
 transform_edges(cube_t c, uint8_t t)
@@ -354,3 +357,40 @@ applytrans(cube_t cube, const char *buf)
 
         return transform(cube, t);
 }
+
+STATIC_INLINE uint8_t
+inverse_trans(uint8_t t)
+{
+        return inverse_trans_table[t];
+}
+
+STATIC uint8_t
+transform_move(uint8_t m, uint8_t t)
+{
+        uint8_t a, base, modifier;
+
+        a = moveaxis(m);
+        base = trans_move_table[t][a];
+        if (movebase(m) != 2 * a)
+                base = moveopposite(base);
+
+        modifier = m % 3;
+        if (t >= TRANS_UFm)
+                modifier = 2 - modifier;
+
+        return base + modifier;
+}
+
+STATIC uint64_t
+symmetry_mask(cube_t cube)
+{
+        uint64_t t, ret;
+        cube_t transformed;
+
+        for (t = 0, ret = 0; t < 48; t++) {
+                transformed = transform(cube, t);
+                ret |= ((uint64_t)equal(cube, transformed)) << t;
+        }
+
+        return ret;
+}