Changed unniss() to return an Alg*. Addedd inplace() to run a function on an alg in place.

1 files changed, 16 insertions, 10 deletions

diff --git a/src/alg.c b/src/alg.c
index 4f5079a..52bebc0 100644
--- a/src/alg.c
+++ b/src/alg.c
@@ -219,6 +219,16 @@ free_alglistnode(AlgListNode *aln)
         free(aln);
 }
 
+void
+inplace(Alg * (*f)(Alg *), Alg *alg)
+{
+        Alg *aux;
+
+        aux = f(alg);
+        copy_alg(aux, alg);
+        free(aux);
+}
+
 Alg *
 inverse_alg(Alg *alg)
 {
@@ -459,27 +469,23 @@ swapmove(Move *m1, Move *m2)
         *m2 = aux;
 }
 
-void
+Alg *
 unniss(Alg *alg)
 {
         int i;
-        Alg *aux;
+        Alg *ret;
 
-        aux = new_alg("");
+        ret = new_alg("");
 
         for (i = 0; i < alg->len; i++)
                 if (!alg->inv[i])
-                        append_move(aux, alg->move[i], false);
+                        append_move(ret, alg->move[i], false);
         
         for (i = alg->len-1; i >= 0; i--)
                 if (alg->inv[i])
-                        append_move(aux, inverse_move(alg->move[i]), false);
+                        append_move(ret, inverse_move(alg->move[i]), false);
         
-        for (i = 0; i < alg->len; i++) {
-                alg->move[i] = aux->move[i];
-                alg->inv[i]  = false;
-        }
-        free(aux);
+        return ret;
 }
 
 void