2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2009, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * nxtitem.c: Get the next item from a list
30 * Known contributors to this file:
42 #include "prototypes.h"
48 nxtitem(struct nstr_item *np, void *ptr)
53 if (np->sel == NS_UNDEF)
55 gp = (struct empobj *)ptr;
57 if (np->sel == NS_LIST) {
59 if (np->index >= np->size)
61 np->cur = np->list[np->index];
62 } else if (np->sel == NS_CARGO) {
66 np->next = unit_cargo_next(np->type, np->next);
70 if (!ef_read(np->type, np->cur, ptr))
79 if (CANT_HAPPEN(!(ef_flags(np->type) & EFF_XY)))
81 if (!xyinrange(gp->x, gp->y, &np->range)) {
85 np->curdist = mapdist(gp->x, gp->y, np->cx, np->cy);
86 if (np->curdist > np->dist)
90 if (CANT_HAPPEN(!(ef_flags(np->type) & EFF_XY)))
92 if (!xyinrange(gp->x, gp->y, &np->range))
96 if (CANT_HAPPEN(!(ef_flags(np->type) & EFF_XY)))
98 if (xnorm(gp->x) != np->cx || ynorm(gp->y) != np->cy)
102 if (CANT_HAPPEN(!(ef_flags(np->type) & EFF_GROUP)))
104 if (np->group != gp->group)
111 if (selected && np->ncond) {
112 /* nstr_exec is expensive, so we do it last */
113 if (!nstr_exec(np->cond, np->ncond, ptr))