2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2011, 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 * unitsub.c: Common subroutines for multiple type of units
29 * Known contributors to this file:
30 * Ron Koenderink, 2007
31 * Markus Armbruster, 2009-2011
40 #include "prototypes.h"
44 unit_nameof(struct empobj *gp)
46 switch (gp->ef_type) {
48 return prship((struct shpstr *)gp);
50 return prplane((struct plnstr *)gp);
52 return prland((struct lndstr *)gp);
54 return prnuke((struct nukstr *)gp);
57 return "The Beast #666";
61 unit_list(struct emp_qelem *unit_list)
64 struct emp_qelem *next;
66 int type, npln, nch, nxl;
71 if (CANT_HAPPEN(QEMPTY(unit_list)))
73 qp = unit_list->q_back;
74 ulp = (struct ulist *)qp;
75 type = ulp->unit.gen.ef_type;
76 if (CANT_HAPPEN(type != EF_LAND && type != EF_SHIP))
80 pr("lnd# land type x,y a eff sh gun xl mu tech retr\n");
82 pr("shp# ship type x,y fl eff mil sh gun pn he xl ln mob tech\n");
84 for (; qp != unit_list; qp = next) {
86 ulp = (struct ulist *)qp;
87 lnd = &ulp->unit.land;
88 shp = &ulp->unit.ship;
89 unit = &ulp->unit.gen;
90 if (CANT_HAPPEN(type != unit->ef_type))
92 pr("%4d ", unit->uid);
93 pr("%-16.16s ", empobj_chr_name(unit));
94 prxy("%4d,%-4d ", unit->x, unit->y);
95 pr("%1.1s", &unit->group);
96 pr("%4d%%", unit->effic);
97 if (type == EF_LAND) {
98 pr("%4d", lnd->lnd_item[I_SHELL]);
99 pr("%4d", lnd->lnd_item[I_GUN]);
100 pr("%3d", lnd_nxlight(lnd));
102 pr("%4d", shp->shp_item[I_MILIT]);
103 pr("%4d", shp->shp_item[I_SHELL]);
104 pr("%4d", shp->shp_item[I_GUN]);
105 npln = shp_nplane(shp, &nch, &nxl, NULL);
106 pr("%3d%3d%3d", npln - nch - nxl, nch, nxl);
107 pr("%3d", shp_nland(shp));
109 pr("%4d", unit->mobil);
110 pr("%4d", unit->tech);
111 if (type == EF_LAND) {
112 pr("%4d%%", lnd->lnd_retreat);
119 unit_put(struct emp_qelem *list, natid actor)
121 struct emp_qelem *qp;
122 struct emp_qelem *newqp;
128 ulp = (struct ulist *)qp;
129 unit = &ulp->unit.gen;
130 if (CANT_HAPPEN(unit->ef_type != EF_LAND
131 && unit->ef_type != EF_SHIP))
134 mpr(actor, "%s stopped at %s\n", unit_nameof(unit),
135 xyas(unit->x, unit->y, actor));
136 if (unit->ef_type == EF_LAND) {
137 if (ulp->mobil < -127)
139 unit->mobil = ulp->mobil;
142 if (unit->ef_type == EF_SHIP)
143 unit->mobil = (int)ulp->mobil;
144 put_empobj(unit->ef_type, unit->uid, unit);
153 unit_path(int together, struct empobj *unit, char *buf)
162 if (CANT_HAPPEN(unit->ef_type != EF_LAND && unit->ef_type != EF_SHIP))
165 if (!sarg_xy(buf, &destx, &desty))
168 pr("Cannot go to a destination sector if not all starting in the same sector\n");
171 if (unit->ef_type == EF_SHIP) {
172 c = path_find(unit->x, unit->y, destx, desty,
173 player->cnum, MOB_SAIL);
174 if (c < 0 || unit->mobil <= 0) {
175 pr("Can't get to '%s' right now.\n",
176 xyas(destx, desty, player->cnum));
180 getsect(unit->x, unit->y, §);
181 mtype = lnd_mobtype((struct lndstr *)unit);
183 * Note: passing sect.sct_own for actor is funny, but works:
184 * its only effect is to confine the search to that nation's
185 * land. It doesn't affect mobility costs. The real actor is
186 * different for marching in allied land, and passing it would
187 * break path finding there.
189 c = path_find(unit->x, unit->y, destx, desty, sect.sct_own, mtype);
191 pr("No owned %s from %s to %s!\n",
192 mtype == MOB_RAIL ? "railway" : "path",
193 xyas(unit->x, unit->y, player->cnum),
194 xyas(destx, desty, player->cnum));
198 len = path_find_route(buf, sizeof(buf), unit->x, unit->y, destx, desty);
199 if (len == 0 || unit->ef_type == EF_LAND) {
200 if (len + 1 < sizeof(buf))
201 strcpy(buf + len, "h");
204 if (len >= sizeof(buf)) {
205 pr("Can't handle path to %s, it's too long, sorry\n",
206 xyas(destx, desty, player->cnum));
209 if (unit->ef_type == EF_LAND)
210 pr("Using path '%s'\n", buf);
215 unit_view(struct emp_qelem *list)
218 struct emp_qelem *qp;
219 struct emp_qelem *next;
222 for (qp = list->q_back; qp != list; qp = next) {
224 ulp = (struct ulist *)qp;
225 if (CANT_HAPPEN(!(ef_flags(ulp->unit.gen.ef_type) & EFF_XY)))
227 getsect(ulp->unit.gen.x, ulp->unit.gen.y, §);
228 if (ulp->unit.gen.ef_type == EF_SHIP) {
229 if (((struct mchrstr *)ulp->chrp)->m_flags & M_FOOD)
230 pr("[fert:%d] ", sect.sct_fertil);
231 if (((struct mchrstr *)ulp->chrp)->m_flags & M_OIL)
232 pr("[oil:%d] ", sect.sct_oil);
234 pr("%s @ %s %d%% %s\n", unit_nameof(&ulp->unit.gen),
235 xyas(ulp->unit.gen.x, ulp->unit.gen.y, player->cnum),
236 sect.sct_effic, dchr[sect.sct_type].d_name);
241 * Update cargo of CARRIER for movement or destruction.
242 * If the carrier is destroyed, destroy its cargo (planes, land units,
244 * Else update their location to the carrier's. Any op sectors equal
245 * to location get updated, too.
248 unit_update_cargo(struct empobj *carrier)
252 union empobj_storage obj;
254 for (cargo_type = EF_PLANE; cargo_type <= EF_NUKE; cargo_type++) {
255 snxtitem_cargo(&ni, cargo_type, carrier->ef_type, carrier->uid);
256 while (nxtitem(&ni, &obj)) {
258 mpr(obj.gen.own, "%s lost!\n", unit_nameof(&obj.gen));
261 /* mission op-area centered on the obj travels with it */
262 if (obj.gen.opx == obj.gen.x && obj.gen.opy == obj.gen.y) {
263 obj.gen.opx = carrier->x;
264 obj.gen.opy = carrier->y;
266 obj.gen.x = carrier->x;
267 obj.gen.y = carrier->y;
269 put_empobj(cargo_type, obj.gen.uid, &obj);
275 * Drop cargo of UNIT.
276 * Give it to NEWOWN, unless it's zero.
279 unit_drop_cargo(struct empobj *unit, natid newown)
283 union empobj_storage cargo;
285 for (type = EF_PLANE; type <= EF_NUKE; type++) {
286 snxtitem_cargo(&ni, type, unit->ef_type, unit->uid);
287 while (nxtitem(&ni, &cargo)) {
290 cargo.plane.pln_ship = cargo.plane.pln_land = -1;
293 cargo.land.lnd_ship = cargo.land.lnd_land = -1;
296 cargo.nuke.nuk_plane = -1;
299 mpr(cargo.gen.own, "%s transferred off %s %d to %s\n",
300 unit_nameof(&cargo.gen),
301 ef_nameof(unit->ef_type), unit->uid,
302 xyas(cargo.gen.x, cargo.gen.y, cargo.gen.own));
304 unit_give_away(&cargo.gen, newown, cargo.gen.own);
305 put_empobj(type, cargo.gen.uid, &cargo.gen);
311 * Give UNIT and its cargo to RECIPIENT.
312 * No action if RECIPIENT already owns UNIT.
313 * If GIVER is non-zero, inform RECIPIENT and GIVER of the transaction.
314 * Clears mission and group on the units given away.
317 unit_give_away(struct empobj *unit, natid recipient, natid giver)
321 union empobj_storage cargo;
323 if (unit->own == recipient)
327 mpr(unit->own, "%s given to %s\n",
328 unit_nameof(unit), cname(recipient));
329 mpr(recipient, "%s given to you by %s\n",
330 unit_nameof(unit), cname(giver));
333 unit->own = recipient;
334 unit_wipe_orders(unit);
335 put_empobj(unit->ef_type, unit->uid, unit);
337 for (type = EF_PLANE; type <= EF_NUKE; type++) {
338 snxtitem_cargo(&ni, type, unit->ef_type, unit->uid);
339 while (nxtitem(&ni, &cargo))
340 unit_give_away(&cargo.gen, recipient, giver);
345 * Wipe orders and such from UNIT.
348 unit_wipe_orders(struct empobj *unit)
356 unit->opx = unit->opy = 0;
360 switch (unit->ef_type) {
362 sp = (struct shpstr *)unit;
363 sp->shp_destx[0] = sp->shp_desty[0] = 0;
364 sp->shp_destx[1] = sp->shp_desty[1] = 0;
365 for (i = 0; i < TMAX; ++i) {
366 sp->shp_tstart[i] = I_NONE;
367 sp->shp_tend[i] = I_NONE;
368 sp->shp_lstart[i] = 0;
372 sp->shp_mobquota = 0;
374 sp->shp_follow = sp->shp_uid;
376 sp->shp_rpath[0] = 0;
379 pp = (struct plnstr *)unit;
380 pp->pln_range = pln_range_max(pp);
383 lp = (struct lndstr *)unit;
384 lp->lnd_retreat = morale_base;
386 lp->lnd_rpath[0] = 0;