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 * tend.c: Transfer goodies from one ship to another.
30 * Known contributors to this file:
32 * Thomas Ruschak, 1992
45 static void expose_ship(struct shpstr *s1, struct shpstr *s2);
46 static int tend_land(struct shpstr *tenderp, char *units);
51 struct nstr_item targets;
52 struct nstr_item tenders;
56 struct mchrstr *vbase;
70 if (!(p = getstarg(player->argp[1],
71 "Tend what commodity (or 'land')? ", buf)) || !*p)
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,
84 getstarg(player->argp[2], "Tender(s)? ", buf)))
87 while (nxtitem(&tenders, &tender)) {
90 if (type == EF_LAND) {
91 sprintf(prompt, "Land unit(s) to tend from %s? ",
93 if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
95 if (!check_ship_ok(&tender))
97 if (0 != (retval = tend_land(&tender, p)))
101 sprintf(prompt, "Number of %s to tend from %s? ",
102 ip->i_name, prship(&tender));
103 if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
105 if (!check_ship_ok(&tender))
107 if (!(amt = atoi(p))) {
108 pr("Amount must be non-zero!\n");
111 ontender = tender.shp_item[ip->i_uid];
112 if (ontender == 0 && amt > 0) {
113 pr("No %s on %s\n", ip->i_name, prship(&tender));
116 vbase = &mchr[(int)tender.shp_type];
117 maxtender = vbase->m_item[ip->i_uid];
118 if (maxtender == 0) {
119 pr("A %s cannot hold any %s\n",
120 mchr[(int)tender.shp_type].m_name, ip->i_name);
123 if (!snxtitem(&targets, EF_SHIP,
124 getstarg(player->argp[4], "Ships to be tended? ",
127 if (!check_ship_ok(&tender))
130 while (nxtitem(&targets, &target)) {
131 if (!player->owner &&
132 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
134 if (target.shp_uid == tender.shp_uid)
136 if (tender.shp_x != target.shp_x ||
137 tender.shp_y != target.shp_y)
139 ontarget = target.shp_item[ip->i_uid];
140 if (ontarget == 0 && amt < 0) {
141 pr("No %s on %s\n", ip->i_name, prship(&target));
144 vbase = &mchr[(int)target.shp_type];
145 maxtarget = vbase->m_item[ip->i_uid];
150 /* take from target and give to tender */
151 transfer = MIN(ontarget, -amt);
152 transfer = MIN(maxtender - ontender, transfer);
155 target.shp_item[ip->i_uid] = ontarget - transfer;
156 ontender += transfer;
159 /* give to target from tender */
160 transfer = MIN(ontender, amt);
161 transfer = MIN(transfer, maxtarget - ontarget);
164 target.shp_item[ip->i_uid] = ontarget + transfer;
165 ontender -= transfer;
167 if (transfer && target.shp_own != player->cnum) {
168 wu(0, target.shp_own, "%s tended %d %s to %s\n",
169 cname(player->cnum), total, ip->i_name,
173 expose_ship(&tender, &target);
174 putship(target.shp_uid, &target);
175 if (amt > 0 && ontender == 0) {
176 pr("%s out of %s\n", prship(&tender), ip->i_name);
180 pr("%d total %s transferred %s %s\n",
181 total, ip->i_name, (amt > 0) ? "off of" : "to",
183 tender.shp_item[ip->i_uid] = ontender;
184 tender.shp_mission = 0;
185 putship(tender.shp_uid, &tender);
191 expose_ship(struct shpstr *s1, struct shpstr *s2)
193 if (s1->shp_pstage == PLG_INFECT && s2->shp_pstage == PLG_HEALTHY)
194 s2->shp_pstage = PLG_EXPOSED;
195 if (s2->shp_pstage == PLG_INFECT && s1->shp_pstage == PLG_HEALTHY)
196 s1->shp_pstage = PLG_EXPOSED;
200 tend_land(struct shpstr *tenderp, char *units)
202 struct nstr_item lni;
203 struct nstr_item targets;
204 struct shpstr target;
207 struct nstr_item pni;
210 if (!snxtitem(&lni, EF_LAND, units))
213 while (nxtitem(&lni, &land)) {
216 if (land.lnd_ship != tenderp->shp_uid) {
217 pr("%s is not on %s!\n", prland(&land), prship(tenderp));
220 if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
221 pr("%s does not have \"assault\" capability and can't be tended\n",
225 if (!snxtitem(&targets, EF_SHIP,
226 getstarg(player->argp[4], "Ship to be tended? ",
229 if (!check_land_ok(&land))
231 while (nxtitem(&targets, &target)) {
232 if (!player->owner &&
233 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
235 if (target.shp_uid == tenderp->shp_uid)
237 if (tenderp->shp_x != target.shp_x ||
238 tenderp->shp_y != target.shp_y)
241 /* Fit unit on ship */
242 count_units(&target);
243 getship(target.shp_uid, &target);
245 if ((!(lchr[(int)land.lnd_type].l_flags & L_LIGHT)) &&
246 (!((mchr[(int)target.shp_type].m_flags & M_SUPPLY) &&
247 (!(mchr[(int)target.shp_type].m_flags & M_SUB))))) {
248 pr("You can only load light units onto ships,\n"
249 "unless the ship is a non-sub supply ship\n"
250 "%s not tended\n", prland(&land));
254 if ((mchr[(int)target.shp_type].m_flags & M_SUB) &&
255 (lchr[(int)land.lnd_type].l_flags & L_SPY) &&
256 !mchr[(int)target.shp_type].m_nland) {
257 if (target.shp_nland > 1) {
258 pr("%s doesn't have room for more than two spy units!\n",
262 } else if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
263 if (mchr[(int)target.shp_type].m_nland)
264 pr("%s doesn't have room for any more land units!\n",
267 pr("%s doesn't carry land units!\n", prship(&target));
270 pr("%s transferred from %s to %s\n",
271 prland(&land), prship(tenderp), prship(&target));
272 sprintf(buf, "loaded on your %s at %s",
273 prship(&target), xyas(target.shp_x, target.shp_y,
275 gift(target.shp_own, player->cnum, &land, buf);
276 land.lnd_ship = target.shp_uid;
278 land.lnd_mission = 0;
280 putland(land.lnd_uid, &land);
281 expose_ship(tenderp, &target);
282 putship(target.shp_uid, &target);
283 count_units(tenderp);
284 putship(tenderp->shp_uid, tenderp);
285 snxtitem_xy(&pni, EF_PLANE, land.lnd_x, land.lnd_y);
286 while (nxtitem(&pni, &plane)) {
287 if (plane.pln_flags & PLN_LAUNCHED)
289 if (plane.pln_land != land.lnd_uid)
291 sprintf(buf, "loaded on %s", prship(&target));
292 gift(target.shp_own, player->cnum, &plane, buf);
293 plane.pln_mission = 0;
294 putplane(plane.pln_uid, &plane);