2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2006, 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:
43 #include "prototypes.h"
46 nxtitem(struct nstr_item *np, void *ptr)
51 if (np->sel == NS_UNDEF)
53 gp = (struct empobj *)ptr;
55 if (np->sel == NS_LIST) {
57 if (np->index >= np->size)
59 np->cur = np->list[np->index];
63 if (!np->read(np->type, np->cur, ptr)) {
64 /* if read fails, fatal */
74 if (!xyinrange(gp->x, gp->y, &np->range)) {
78 np->curdist = mapdist((int)gp->x, (int)gp->y,
79 (int)np->cx, (int)np->cy);
80 if (np->curdist > np->dist)
84 if (!xyinrange(gp->x, gp->y, &np->range))
86 if (gp->x == np->range.hx || gp->y == np->range.hy)
90 if (xnorm(gp->x) != np->cx || ynorm(gp->y) != np->cy)
94 if (np->group != gp->group)
101 if (selected && np->ncond) {
102 /* nstr_exec is expensive, so we do it last */
103 if (!nstr_exec(np->cond, np->ncond, ptr))