empserver/src/lib/commands/drop.c
Markus Armbruster 729cf65e12 Don't let fly and drop give away civilians
Flying them to a foreign destination magically changes their
allegiance.  Prohibit that.

Equivalent change was already in commit 35887222 (v4.2.17) but got
reverted immediately (commit 20199b22), because fly and drop should
stay consistent with load, which let you give away civilians then.  No
more since commit 92a366ce (v4.3.20).  This change makes fly and drop
consistent with load again.
2012-07-13 20:15:33 +02:00

132 lines
3.8 KiB
C

/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2012, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure, Markus Armbruster
*
* Empire is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
* See files README, COPYING and CREDITS in the root of the source
* tree for related information and legal notices. It is expected
* that future projects/authors will amend these files as needed.
*
* ---
*
* drop.c: Air-drop commodities
*
* Known contributors to this file:
* Dave Pare, 1986
* Markus Armbruster, 2004-2012
*/
#include <config.h>
#include "commands.h"
#include "item.h"
#include "path.h"
#include "plane.h"
int
drop(void)
{
coord tx, ty;
coord ax, ay;
int ap_to_target;
struct ichrstr *ip;
char flightpath[MAX_PATH_LEN];
struct nstr_item ni_bomb;
struct nstr_item ni_esc;
struct sctstr target;
struct emp_qelem bomb_list;
struct emp_qelem esc_list;
int wantflags;
struct sctstr ap_sect;
char buf[1024];
if (get_planes(&ni_bomb, &ni_esc, player->argp[1], player->argp[2]) < 0)
return RET_SYN;
if (!get_assembly_point(player->argp[3], &ap_sect, buf))
return RET_SYN;
ax = ap_sect.sct_x;
ay = ap_sect.sct_y;
if (!getpath(flightpath, player->argp[4], ax, ay, 0, 0, MOB_FLY)
|| *flightpath == 0)
return RET_SYN;
tx = ax;
ty = ay;
(void)pathtoxy(flightpath, &tx, &ty, fcost);
pr("target is %s\n", xyas(tx, ty, player->cnum));
if (!(ip = whatitem(player->argp[5], "Drop off what? ")))
return RET_SYN;
getsect(tx, ty, &target);
if (relations_with(target.sct_own, player->cnum) == ALLIED) {
/* own or allied sector: cargo drop */
if (ip->i_uid == I_CIVIL) {
if (target.sct_own != player->cnum) {
pr("Your civilians refuse to board a flight abroad!\n");
return RET_FAIL;
}
if (target.sct_own != target.sct_oldown) {
pr("Can't drop civilians into occupied sectors.\n");
return RET_FAIL;
}
}
wantflags = P_C;
} else {
/* into the unknown... */
if (ip->i_uid != I_SHELL) {
pr("You don't own %s!\n", xyas(tx, ty, player->cnum));
return RET_FAIL;
}
/* mine drop */
wantflags = P_MINE;
}
ap_to_target = strlen(flightpath);
if (flightpath[ap_to_target - 1] == 'h')
ap_to_target--;
pr("range to target is %d\n", ap_to_target);
/*
* select planes within range
*/
pln_sel(&ni_bomb, &bomb_list, &ap_sect, ap_to_target, 2,
wantflags, P_M | P_O);
pln_sel(&ni_esc, &esc_list, &ap_sect, ap_to_target, 2,
P_ESC | P_F, P_M | P_O);
/*
* now arm and equip the bombers, transports, whatever.
*/
pln_arm(&bomb_list, 2 * ap_to_target,
wantflags & P_MINE ? 'm' : 'd',
ip);
if (QEMPTY(&bomb_list)) {
pr("No planes could be equipped for the mission.\n");
return RET_FAIL;
}
pln_arm(&esc_list, 2 * ap_to_target, 'e', NULL);
ac_encounter(&bomb_list, &esc_list, ax, ay, flightpath, 0);
if (QEMPTY(&bomb_list)) {
pr("No planes got through fighter defenses\n");
} else {
if (wantflags & P_MINE)
pln_mine(&bomb_list, tx, ty);
else
pln_dropoff(&bomb_list, ip, tx, ty, -1);
}
pln_put(&bomb_list);
pln_put(&esc_list);
return RET_OK;
}