Added an automatic `Solve' feature to most games. This is useful for

various things:
 - if you haven't fully understood what a game is about, it gives
   you an immediate example of a puzzle plus its solution so you can
   understand it
 - in some games it's useful to compare your solution with the real
   one and see where you made a mistake
 - in the rearrangement games (Fifteen, Sixteen, Twiddle) it's handy
   to be able to get your hands on a pristine grid quickly so you
   can practise or experiment with manoeuvres on it
 - it provides a good way of debugging the games if you think you've
   encountered an unsolvable grid!

[originally from svn r5731]

1 files changed, 7 insertions, 0 deletions

diff --git a/cube.c b/cube.c
index 33ef6d3..5166762 100644
--- a/cube.c
+++ b/cube.c
@@ -985,6 +985,12 @@ static void free_game(game_state *state)
     sfree(state);
 }
 
+static game_state *solve_game(game_state *state, game_aux_info *aux,
+			      char **error)
+{
+    return NULL;
+}
+
 static char *game_text_format(game_state *state)
 {
     return NULL;
@@ -1557,6 +1563,7 @@ const struct game thegame = {
     new_game,
     dup_game,
     free_game,
+    FALSE, solve_game,
     NULL, game_text_format,
     new_ui,
     free_ui,