1 files changed, 37 insertions, 30 deletions

diff --git a/src/alg.c b/src/alg.c
index d9317ab..4c732a3 100644
--- a/src/alg.c
+++ b/src/alg.c
@@ -107,36 +107,6 @@ allowed_next_HTM(Move l2, Move l1, Move m)
         return !(p || (commute(l1, l2) && q));
 }
 
-static int
-axis(Move m)
-{
-        if (m == NULLMOVE)
-                return 0;
-
-        if (m >= U && m <= B3)
-                return (m-1)/6 + 1;
-        
-        if (m >= Uw && m <= Bw3)
-                return (m-1)/6 - 2;
-
-        if (base_move(m) == E || base_move(m) == y)
-                return 1;
-
-        if (base_move(m) == M || base_move(m) == x)
-                return 2;
-
-        if (base_move(m) == S || base_move(m) == z)
-                return 3;
-
-        return -1;
-}
-
-bool
-commute(Move m1, Move m2)
-{
-        return axis(m1) == axis(m2);
-}
-
 void
 append_alg(AlgList *l, Alg *alg)
 {
@@ -166,6 +136,30 @@ append_move(Alg *alg, Move m, bool inverse)
         alg->len++;
 }
 
+static int
+axis(Move m)
+{
+        if (m == NULLMOVE)
+                return 0;
+
+        if (m >= U && m <= B3)
+                return (m-1)/6 + 1;
+        
+        if (m >= Uw && m <= Bw3)
+                return (m-1)/6 - 2;
+
+        if (base_move(m) == E || base_move(m) == y)
+                return 1;
+
+        if (base_move(m) == M || base_move(m) == x)
+                return 2;
+
+        if (base_move(m) == S || base_move(m) == z)
+                return 3;
+
+        return -1;
+}
+
 Move
 base_move(Move m)
 {
@@ -175,6 +169,12 @@ base_move(Move m)
                 return m - (m-1)%3;
 }
 
+bool
+commute(Move m1, Move m2)
+{
+        return axis(m1) == axis(m2);
+}
+
 void
 compose_alg(Alg *alg1, Alg *alg2)
 {
@@ -185,6 +185,13 @@ compose_alg(Alg *alg1, Alg *alg2)
 }
 
 void
+copy_alg(Alg *src, Alg *dst)
+{
+        dst->len = 0; /* Overwrites */
+        compose_alg(dst, src);
+}
+
+void
 free_alg(Alg *alg)
 {
         free(alg->move);