2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2018, 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 * tend.c: Transfer goodies from one ship to another.
29 * Known contributors to this file:
31 * Thomas Ruschak, 1992
33 * Markus Armbruster, 2004-2017
44 static void expose_ship(struct shpstr *s1, struct shpstr *s2);
45 static int tend_land(struct shpstr *tenderp, char *units);
50 struct nstr_item targets;
51 struct nstr_item tenders;
55 struct mchrstr *vbase;
69 p = getstarg(player->argp[1], "Tend what commodity (or 'land')? ",
74 if (!strncmp(p, "land", 4))
76 else if (NULL != (ip = item_by_name(p)))
79 pr("Can't tend '%s'\n", p);
83 if (!snxtitem(&tenders, EF_SHIP, player->argp[2], "Tender(s)? "))
86 while (nxtitem(&tenders, &tender)) {
88 if (tenders.sel == NS_LIST)
89 pr("You don't own ship #%d!\n", tender.shp_uid);
92 if (type == EF_LAND) {
93 sprintf(prompt, "Land unit(s) to tend from %s? ",
95 p = getstarg(player->argp[3], prompt, buf);
100 if (!check_ship_ok(&tender))
102 if (0 != (retval = tend_land(&tender, p)))
106 sprintf(prompt, "Number of %s to tend from %s? ",
107 ip->i_name, prship(&tender));
108 p = getstarg(player->argp[3], prompt, buf);
113 if (!check_ship_ok(&tender))
115 if (!(amt = atoi(p))) {
116 pr("Amount must be non-zero!\n");
119 ontender = tender.shp_item[ip->i_uid];
120 if (ontender == 0 && amt > 0) {
121 pr("No %s on %s\n", ip->i_name, prship(&tender));
124 vbase = &mchr[(int)tender.shp_type];
125 maxtender = vbase->m_item[ip->i_uid];
126 if (maxtender == 0) {
127 pr("A %s cannot hold any %s\n",
128 mchr[(int)tender.shp_type].m_name, ip->i_name);
131 if (!snxtitem(&targets, EF_SHIP,
132 player->argp[4], "Ships to be tended? "))
134 if (!check_ship_ok(&tender))
137 while (nxtitem(&targets, &target)) {
139 && relations_with(target.shp_own, player->cnum) < FRIENDLY)
141 if (target.shp_uid == tender.shp_uid)
143 if (tender.shp_x != target.shp_x ||
144 tender.shp_y != target.shp_y)
146 if (ip->i_uid == I_CIVIL && tender.shp_own != target.shp_own)
148 ontarget = target.shp_item[ip->i_uid];
149 vbase = &mchr[(int)target.shp_type];
150 maxtarget = vbase->m_item[ip->i_uid];
152 /* take from target and give to tender */
156 pr("No %s on %s\n", ip->i_name, prship(&target));
159 transfer = MIN(ontarget, -amt);
160 transfer = MIN(maxtender - ontender, transfer);
163 target.shp_item[ip->i_uid] = ontarget - transfer;
164 ontender += transfer;
167 /* give to target from tender */
168 transfer = MIN(ontender, amt);
169 transfer = MIN(transfer, maxtarget - ontarget);
172 target.shp_item[ip->i_uid] = ontarget + transfer;
173 ontender -= transfer;
175 if (transfer && target.shp_own != player->cnum) {
176 wu(0, target.shp_own, "%s tended %d %s to %s\n",
177 cname(player->cnum), total, ip->i_name,
181 expose_ship(&tender, &target);
182 putship(target.shp_uid, &target);
183 if (amt > 0 && ontender == 0) {
184 pr("%s out of %s\n", prship(&tender), ip->i_name);
188 pr("%d total %s transferred %s %s\n",
189 total, ip->i_name, (amt > 0) ? "off of" : "to",
191 tender.shp_item[ip->i_uid] = ontender;
192 tender.shp_mission = 0;
193 putship(tender.shp_uid, &tender);
199 expose_ship(struct shpstr *s1, struct shpstr *s2)
201 if (s1->shp_pstage == PLG_INFECT && s2->shp_pstage == PLG_HEALTHY)
202 s2->shp_pstage = PLG_EXPOSED;
203 if (s2->shp_pstage == PLG_INFECT && s1->shp_pstage == PLG_HEALTHY)
204 s1->shp_pstage = PLG_EXPOSED;
208 tend_land(struct shpstr *tenderp, char *units)
210 struct nstr_item lni;
211 struct nstr_item targets;
212 struct shpstr target;
216 if (!snxtitem(&lni, EF_LAND, units, NULL))
219 while (nxtitem(&lni, &land)) {
220 if (!player->owner) {
221 if (lni.sel == NS_LIST)
222 pr("You don't own land unit #%d!\n", land.lnd_uid);
225 if (land.lnd_ship != tenderp->shp_uid) {
226 if (lni.sel == NS_LIST)
227 pr("%s is not on %s!\n", prland(&land), prship(tenderp));
230 if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
231 pr("%s does not have \"assault\" capability and can't be tended\n",
235 if (!snxtitem(&targets, EF_SHIP,
236 player->argp[4], "Ship to be tended? "))
238 if (!check_ship_ok(tenderp) || !check_land_ok(&land))
240 while (nxtitem(&targets, &target)) {
242 && relations_with(target.shp_own, player->cnum) < FRIENDLY)
244 if (target.shp_uid == tenderp->shp_uid)
246 if (tenderp->shp_x != target.shp_x ||
247 tenderp->shp_y != target.shp_y)
250 /* Fit unit on ship */
251 getship(target.shp_uid, &target);
253 if ((!(lchr[(int)land.lnd_type].l_flags & L_LIGHT)) &&
254 (!((mchr[(int)target.shp_type].m_flags & M_SUPPLY) &&
255 (!(mchr[(int)target.shp_type].m_flags & M_SUB))))) {
256 pr("You can only load light units onto ships,\n"
257 "unless the ship is a non-sub supply ship\n"
258 "%s not tended\n", prland(&land));
262 if ((mchr[(int)target.shp_type].m_flags & M_SUB) &&
263 (lchr[(int)land.lnd_type].l_flags & L_SPY) &&
264 !mchr[(int)target.shp_type].m_nland) {
265 if (shp_nland(&target) > 1) {
266 pr("%s doesn't have room for more than two spy units!\n",
270 } else if (shp_nland(&target) >= mchr[target.shp_type].m_nland) {
271 if (mchr[(int)target.shp_type].m_nland)
272 pr("%s doesn't have room for any more land units!\n",
275 pr("%s doesn't carry land units!\n", prship(&target));
278 pr("%s transferred from %s to %s\n",
279 prland(&land), prship(tenderp), prship(&target));
280 sprintf(buf, "loaded on your %s at %s",
281 prship(&target), xyas(target.shp_x, target.shp_y,
283 gift(target.shp_own, player->cnum, &land, buf);
284 land.lnd_ship = target.shp_uid;
286 putland(land.lnd_uid, &land);
287 expose_ship(tenderp, &target);
288 putship(target.shp_uid, &target);
289 putship(tenderp->shp_uid, tenderp);