X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/1cea529f7dc604c05ae5d8a86c736e37fedd88aa..43ae41784d3ef4fe3ada6e9c2f24245b83b67691:/midend.c

diff --git a/midend.c b/midend.c
index 8f4e4c9..00b187d 100644
--- a/midend.c
+++ b/midend.c
@@ -106,6 +106,22 @@ midend *midend_new(frontend *fe, const game *ourgame,
     me->nstates = me->statesize = me->statepos = 0;
     me->states = NULL;
     me->params = ourgame->default_params();
+    /*
+     * Allow environment-based changing of the default settings by
+     * defining a variable along the lines of `NET_DEFAULT=25x25w'
+     * in which the value is an encoded parameter string.
+     */
+    {
+        char buf[80], *e;
+        int j, k;
+        sprintf(buf, "%s_DEFAULT", me->ourgame->name);
+	for (j = k = 0; buf[j]; j++)
+	    if (!isspace((unsigned char)buf[j]))
+		buf[k++] = toupper((unsigned char)buf[j]);
+	buf[k] = '\0';
+        if ((e = getenv(buf)) != NULL)
+            me->ourgame->decode_params(me->params, e);
+    }
     me->curparams = NULL;
     me->desc = me->privdesc = NULL;
     me->seedstr = NULL;
@@ -1331,7 +1347,8 @@ char *midend_solve(midend *me)
 	me->anim_time = 0.0;
 	midend_finish_move(me);
     }
-    midend_redraw(me);
+    if (me->drawing)
+        midend_redraw(me);
     midend_set_timer(me);
     return NULL;
 }