[Freeciv-Dev] Re: (PR#15408) ai_select_tech can return A_UNSET in choice

["Mike Kaufman" <kaufman@xxxxxxxxxxxxxxxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=15408 >

On Sat, Feb 04, 2006 at 08:03:37PM -0800, Mike Kaufman wrote:
> 
> It seems I was wrong, this bug occurs because the player has researched all
> techs, and is on Future Tech 1. At that point, want equals 0 for all techs
> so values[] are all <= 0.

and here is a patch.

-mike

Index: ai/aitech.c
===================================================================
--- ai/aitech.c (revision 11503)
+++ ai/aitech.c (working copy)
@@ -69,6 +69,22 @@
   goal_values[A_UNSET] = -1;
   goal_values[A_NONE] = -1;
 
+  /* if we are researching future techs, then simply continue with that. 
+   * we don't need to do anything below. */
+  if (is_future_tech(get_player_research(pplayer)->researching)) {
+    if (choice) {
+      choice->choice = get_player_research(pplayer)->researching;
+      choice->want = 1;
+      choice->current_want = 1;
+    }
+    if (goal) {
+      goal->choice = get_player_research(pplayer)->researching;
+      goal->want = 1;
+      goal->current_want = 1;
+    }
+    return;
+  }  
+
   /* Fill in values for the techs: want of the tech 
    * + average want of those we will discover en route */
   tech_type_iterate(i) {