2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire 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 3 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, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * lten.c: Transfer commodity from a ship to a land unit the ship is
30 * Known contributors to this file:
35 * Markus Armbruster, 2004-2017
46 static void expose_land(struct shpstr *s1, struct lndstr *l1);
51 struct nstr_item targets;
52 struct nstr_item tenders;
56 struct mchrstr *vbase;
57 struct lchrstr *lbase;
69 if (!(ip = whatitem(player->argp[1], "Transfer what commodity? ")))
72 if (!snxtitem(&tenders, EF_SHIP, player->argp[2], "Tender(s)? "))
74 while (nxtitem(&tenders, &tender)) {
75 if (!player->owner || !tender.shp_own) {
76 if (tenders.sel == NS_LIST)
77 pr("You don't own ship #%d!\n", tender.shp_uid);
80 sprintf(prompt, "Number of %s to tend from %s? ",
81 ip->i_name, prship(&tender));
82 if (!(p = getstarg(player->argp[3], prompt, buf)))
86 if (!check_ship_ok(&tender))
90 pr("Amount must be non-zero!\n");
93 ontender = tender.shp_item[ip->i_uid];
94 if (ontender == 0 && amt > 0) {
95 pr("No %s on %s\n", ip->i_name, prship(&tender));
98 vbase = &mchr[(int)tender.shp_type];
99 maxtender = vbase->m_item[ip->i_uid];
100 if (maxtender == 0) {
101 pr("%s cannot hold any %s\n", prship(&tender), ip->i_name);
104 if (!snxtitem(&targets, EF_LAND,
105 player->argp[4], "Units to be tended? "))
107 if (!check_ship_ok(&tender))
110 while (nxtitem(&targets, &target)) {
111 if (!player->owner || !target.lnd_own) {
112 if (targets.sel == NS_LIST)
113 pr("You don't own land unit #%d!\n", target.lnd_uid);
116 if (target.lnd_ship != tender.shp_uid) {
117 if (targets.sel == NS_LIST)
118 pr("%s is not on %s!\n",
119 prland(&target), prship(&tender));
122 ontarget = target.lnd_item[ip->i_uid];
123 if (ontarget == 0 && amt < 0) {
124 pr("No %s on %s\n", ip->i_name, prland(&target));
127 lbase = &lchr[(int)target.lnd_type];
128 maxtarget = lbase->l_item[ip->i_uid];
133 /* take from target and give to tender */
134 transfer = MIN(ontarget, -amt);
135 transfer = MIN(maxtender - ontender, transfer);
138 target.lnd_item[ip->i_uid] = ontarget - transfer;
139 ontender += transfer;
142 /* give to target from tender */
143 transfer = MIN(ontender, amt);
144 transfer = MIN(transfer, maxtarget - ontarget);
147 target.lnd_item[ip->i_uid] = ontarget + transfer;
148 ontender -= transfer;
151 expose_land(&tender, &target);
152 putland(target.lnd_uid, &target);
153 if (amt > 0 && ontender == 0) {
154 pr("%s out of %s\n", prship(&tender), ip->i_name);
158 pr("%d total %s transferred %s %s\n",
159 total, ip->i_name, (amt > 0) ? "off of" : "to",
161 tender.shp_item[ip->i_uid] = ontender;
162 tender.shp_mission = 0;
163 putship(tender.shp_uid, &tender);
169 expose_land(struct shpstr *s1, struct lndstr *l1)
171 if (s1->shp_pstage == PLG_INFECT && l1->lnd_pstage == PLG_HEALTHY)
172 l1->lnd_pstage = PLG_EXPOSED;
173 if (l1->lnd_pstage == PLG_INFECT && s1->shp_pstage == PLG_HEALTHY)
174 s1->shp_pstage = PLG_EXPOSED;