X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/063f4810b7ca31d194f95bba7c24b56e85ada362..3199a01b45fe16e540800fb73f69b4188d6e70ff:/midend.c

diff --git a/midend.c b/midend.c
index 1f564f3..979a3b6 100644
--- a/midend.c
+++ b/midend.c
@@ -102,7 +102,7 @@ midend *midend_new(frontend *fe, const game *ourgame,
 
     me->frontend = fe;
     me->ourgame = ourgame;
-    me->random = random_init(randseed, randseedsize);
+    me->random = random_new(randseed, randseedsize);
     me->nstates = me->statesize = me->statepos = 0;
     me->states = NULL;
     me->params = ourgame->default_params();
@@ -218,6 +218,17 @@ void midend_size(midend *me, int *x, int *y, int expand)
     int rx, ry;
 
     /*
+     * We can't set the size on the same drawstate twice. So if
+     * we've already sized one drawstate, we must throw it away and
+     * create a new one.
+     */
+    if (me->drawstate && me->tilesize > 0) {
+        me->ourgame->free_drawstate(me->drawing, me->drawstate);
+        me->drawstate = me->ourgame->new_drawstate(me->drawing,
+                                                   me->states[0].state);
+    }
+
+    /*
      * Find the tile size that best fits within the given space. If
      * `expand' is TRUE, we must actually find the _largest_ such
      * tile size; otherwise, we bound above at the game's preferred
@@ -331,7 +342,7 @@ void midend_new_game(midend *me)
         sfree(me->aux_info);
 	me->aux_info = NULL;
 
-        rs = random_init(me->seedstr, strlen(me->seedstr));
+        rs = random_new(me->seedstr, strlen(me->seedstr));
 	/*
 	 * If this midend has been instantiated without providing a
 	 * drawing API, it is non-interactive. This means that it's
@@ -345,8 +356,24 @@ void midend_new_game(midend *me)
     }
 
     ensure(me);
+
+    /*
+     * It might seem a bit odd that we're using me->params to
+     * create the initial game state, rather than me->curparams
+     * which is better tailored to this specific game and which we
+     * always know.
+     * 
+     * It's supposed to be an invariant in the midend that
+     * me->params and me->curparams differ in no aspect that is
+     * important after generation (i.e. after new_desc()). By
+     * deliberately passing the _less_ specific of these two
+     * parameter sets, we provoke play-time misbehaviour in the
+     * case where a game has failed to encode a play-time parameter
+     * in the non-full version of encode_params().
+     */
     me->states[me->nstates].state =
 	me->ourgame->new_game(me, me->params, me->desc);
+
     me->states[me->nstates].movestr = NULL;
     me->states[me->nstates].movetype = NEWGAME;
     me->nstates++;
@@ -551,7 +578,7 @@ static int midend_really_process_key(midend *me, int x, int y, int button)
      * See if this move requires an animation.
      */
     if (special(type) && !(type == SOLVE &&
-			   (me->ourgame->mouse_priorities & SOLVE_ANIMATES))) {
+			   (me->ourgame->flags & SOLVE_ANIMATES))) {
         anim_time = 0;
     } else {
         anim_time = me->ourgame->anim_length(oldstate,
@@ -663,7 +690,7 @@ int midend_process_key(midend *me, int x, int y, int button)
 	 * If the new button has lower priority than the old one,
 	 * don't bother doing this.
 	 */
-	if (me->ourgame->mouse_priorities &
+	if (me->ourgame->flags &
 	    BUTTON_BEATS(me->pressed_mouse_button, button))
 	    return ret;		       /* just ignore it */
 
@@ -1156,12 +1183,15 @@ char *midend_solve(midend *me)
     if (me->statepos < 1)
 	return "No game set up to solve";   /* _shouldn't_ happen! */
 
-    msg = "Solve operation failed";    /* game _should_ overwrite on error */
+    msg = NULL;
     movestr = me->ourgame->solve(me->states[0].state,
 				 me->states[me->statepos-1].state,
 				 me->aux_info, &msg);
-    if (!movestr)
+    if (!movestr) {
+	if (!msg)
+	    msg = "Solve operation failed";   /* _shouldn't_ happen, but can */
 	return msg;
+    }
     s = me->ourgame->execute_move(me->states[me->statepos-1].state, movestr);
     assert(s);
 
@@ -1184,7 +1214,7 @@ char *midend_solve(midend *me)
                                    me->states[me->statepos-2].state,
                                    me->states[me->statepos-1].state);
     me->dir = +1;
-    if (me->ourgame->mouse_priorities & SOLVE_ANIMATES) {
+    if (me->ourgame->flags & SOLVE_ANIMATES) {
 	me->oldstate = me->ourgame->dup_game(me->states[me->statepos-2].state);
         me->anim_time =
 	    me->ourgame->anim_length(me->states[me->statepos-2].state,