1 /**********************************************************************
2  Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
3    This program is free software; you can redistribute it and/or modify
4    it under the terms of the GNU General Public License as published by
5    the Free Software Foundation; either version 2, or (at your option)
6    any later version.
7 
8    This program is distributed in the hope that it will be useful,
9    but WITHOUT ANY WARRANTY; without even the implied warranty of
10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11    GNU General Public License for more details.
12 ***********************************************************************/
13 #ifndef FC__VALIDITY_H
14 #define FC__VALIDITY_H
15 
16 #ifdef __cplusplus
17 extern "C" {
18 #endif /* __cplusplus */
19 
20 typedef void (*requirers_cb)(const char *msg);
21 
22 bool is_tech_needed(struct advance *padv, requirers_cb cb);
23 bool is_building_needed(struct impr_type *pimpr, requirers_cb cb);
24 bool is_utype_needed(struct unit_type *ptype, requirers_cb cb);
25 
26 #ifdef __cplusplus
27 }
28 #endif /* __cplusplus */
29 
30 #endif /* FC__VALIDITY_H */
31