2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2015, 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 * shpsub.c: Ship subroutine stuff
29 * Known contributors to this file:
31 * Steve McClure, 1996-2000
32 * Markus Armbruster, 2006-2015
50 #include "prototypes.h"
56 static void shp_nav_put_one(struct ulist *);
57 static int shp_check_one_mines(struct ulist *);
58 static int shp_hit_mine(struct shpstr *);
59 static void shp_stays(natid, char *, struct ulist *);
62 shp_find_capable(struct emp_qelem *list, int flags)
67 for (qp = list->q_back; qp != list; qp = qp->q_back) {
68 mlp = (struct ulist *)qp;
69 if (mchr[mlp->unit.ship.shp_type].m_flags & flags)
76 shp_may_nav(struct shpstr *sp, struct shpstr *flg, char *suffix)
80 if (!sp->shp_own || !getsect(sp->shp_x, sp->shp_y, §)) {
85 if (opt_MARKET && ontradingblock(EF_SHIP, sp)) {
86 mpr(sp->shp_own, "%s is on the trading block%s\n",
91 if (sp->shp_item[I_MILIT] == 0 && sp->shp_item[I_CIVIL] == 0) {
92 mpr(sp->shp_own, "%s is crewless%s\n", prship(sp), suffix);
96 switch (shp_check_nav(sp, §)) {
99 case SHP_STUCK_CONSTRUCTION:
100 mpr(sp->shp_own, "%s is caught in a construction zone%s\n",
106 case SHP_STUCK_CANAL:
107 case SHP_STUCK_IMPASSABLE:
108 mpr(sp->shp_own, "%s is landlocked%s\n", prship(sp), suffix);
112 if (flg && (sp->shp_x != flg->shp_x || sp->shp_y != flg->shp_y)) {
113 mpr(sp->shp_own, "%s is not with the flagship%s\n",
121 shp_sel(struct nstr_item *ni, struct emp_qelem *list)
123 struct shpstr ship, *flg = NULL;
127 while (nxtitem(ni, &ship)) {
129 * It would be nice to let deities navigate foreign ships, but
130 * much of the code assumes that only the ship's owner can
133 if (!ship.shp_own || ship.shp_own != player->cnum)
135 if (!shp_may_nav(&ship, flg, ""))
138 ship.shp_mission = 0;
140 memset(ship.shp_rpath, 0, sizeof(ship.shp_rpath));
141 putship(ship.shp_uid, &ship);
142 mlp = shp_insque(&ship, list);
144 flg = &mlp->unit.ship;
150 * Return the new list link.
153 shp_insque(struct shpstr *sp, struct emp_qelem *list)
155 struct ulist *mlp = malloc(sizeof(struct ulist));
157 mlp->unit.ship = *sp;
158 mlp->mobil = sp->shp_mobil;
159 emp_insque(&mlp->queue, list);
164 shp_nav(struct emp_qelem *list, natid actor)
166 struct emp_qelem *qp;
167 struct emp_qelem *next;
169 struct shpstr *sp, *flg = NULL;
172 for (qp = list->q_back; qp != list; qp = next) {
174 mlp = (struct ulist *)qp;
175 sp = &mlp->unit.ship;
176 getship(sp->shp_uid, sp);
178 if (sp->shp_own != actor) {
179 mpr(actor, "%s was sunk at %s\n",
180 prship(sp), xyas(sp->shp_x, sp->shp_y, actor));
181 emp_remque(&mlp->queue);
186 snprintf(and_stays, sizeof(and_stays), " & stays in %s",
187 xyas(sp->shp_x, sp->shp_y, actor));
188 if (!shp_may_nav(sp, flg, and_stays)) {
189 shp_nav_put_one(mlp);
195 if (sp->shp_mobil + 1 < (int)mlp->mobil) {
196 mlp->mobil = sp->shp_mobil;
202 shp_nav_put(struct emp_qelem *list, natid actor)
204 struct emp_qelem *qp, *next;
208 for (qp = list->q_back; qp != list; qp = next) {
210 mlp = (struct ulist *)qp;
211 sp = &mlp->unit.ship;
212 mpr(actor, "%s stopped at %s\n",
213 prship(sp), xyas(sp->shp_x, sp->shp_y, actor));
214 shp_nav_put_one(mlp);
219 shp_nav_put_one(struct ulist *mlp)
221 mlp->unit.ship.shp_mobil = (int)mlp->mobil;
222 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
223 emp_remque(&mlp->queue);
228 * Sweep seamines with engineers in SHIP_LIST for ACTOR.
229 * All ships in SHIP_LIST must be in the same sector.
230 * If EXPLICIT is non-zero, this is for an explicit sweep command from
231 * a player. Else it's an automatic "on the move" sweep.
232 * If TAKEMOB is non-zero, require and charge mobility.
233 * Return non-zero when the ships should stop.
236 shp_sweep(struct emp_qelem *ship_list, int explicit, int takemob,
239 struct emp_qelem *qp;
240 struct emp_qelem *next;
243 int mines, m, max, shells;
245 int stopping = 0, first = 1;
247 mlp = shp_find_capable(ship_list, M_SWEEP);
250 mpr(actor, "No minesweepers!\n");
254 getsect(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y, §);
255 if (sect.sct_type != SCT_WATER) {
257 mpr(actor, "%s is a %s. No seamines there!\n",
258 xyas(sect.sct_x, sect.sct_y, actor),
259 dchr[sect.sct_type].d_name);
263 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
265 mlp = (struct ulist *)qp;
266 if (!(mchr[mlp->unit.ship.shp_type].m_flags & M_SWEEP))
269 if (mlp->mobil <= 0.0) {
271 mpr(actor, "%s is out of mobility!\n",
272 prship(&mlp->unit.ship));
275 mlp->mobil -= shp_mobcost(&mlp->unit.ship);
276 mlp->unit.ship.shp_mobil = (int)mlp->mobil;
278 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
279 getsect(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y, §);
280 if (!(mines = sect.sct_mines))
282 max = mchr[mlp->unit.ship.shp_type].m_item[I_SHELL];
283 shells = mlp->unit.ship.shp_item[I_SHELL];
284 for (m = 0; mines > 0 && m < 5; m++) {
287 mpr(actor, "Approaching minefield at %s...\n",
288 xyas(sect.sct_x, sect.sct_y, actor));
291 mpr(actor, "Sweep...\n");
293 shells = MIN(max, shells + 1);
294 changed |= map_set(actor, sect.sct_x, sect.sct_y, 'X', 0);
297 sect.sct_mines = mines;
298 mlp->unit.ship.shp_item[I_SHELL] = shells;
299 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
301 if (shp_check_one_mines(mlp)) {
313 shp_check_one_mines(struct ulist *mlp)
318 getsect(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y, §);
319 if (sect.sct_type != SCT_WATER)
323 if (chance(DMINE_HITCHANCE(sect.sct_mines))) {
324 actor = mlp->unit.ship.shp_own;
325 shp_hit_mine(&mlp->unit.ship);
327 if (map_set(actor, sect.sct_x, sect.sct_y, 'X', 0))
330 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
331 if (!mlp->unit.ship.shp_own)
338 shp_check_mines(struct emp_qelem *ship_list)
340 struct emp_qelem *qp;
341 struct emp_qelem *next;
345 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
347 mlp = (struct ulist *)qp;
348 if (shp_check_one_mines(mlp)) {
359 shp_stays(natid actor, char *str, struct ulist *mlp)
361 mpr(actor, "%s %s & stays in %s\n",
362 prship(&mlp->unit.ship), str,
363 xyas(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y, actor));
364 shp_nav_put_one(mlp);
368 * Return whether and why SP would be stuck in SECTP.
371 shp_check_nav(struct shpstr *sp, struct sctstr *sectp)
373 switch (dchr[sectp->sct_type].d_nav) {
377 if (!(mchr[sp->shp_type].m_flags & M_CANAL)) {
378 return SHP_STUCK_CANAL;
382 if (sectp->sct_effic < 2)
383 return SHP_STUCK_CONSTRUCTION;
386 if (sectp->sct_effic < 60)
387 return SHP_STUCK_CONSTRUCTION;
393 return SHP_STUCK_IMPASSABLE;
395 return SHP_STUCK_NOT;
399 sect_has_dock(struct sctstr *sect)
401 switch (dchr[sect->sct_type].d_nav) {
411 shp_count(struct emp_qelem *list, int wantflags, int nowantflags,
414 struct emp_qelem *qp;
415 struct emp_qelem *next;
419 for (qp = list->q_back; qp != list; qp = next) {
421 mlp = (struct ulist *)qp;
422 if (mlp->unit.ship.shp_x != x || mlp->unit.ship.shp_y != y)
425 (mchr[mlp->unit.ship.shp_type].m_flags & wantflags) != wantflags)
428 mchr[mlp->unit.ship.shp_type].m_flags & nowantflags)
436 shp_damage_one(struct ulist *mlp, int dam)
438 /* ship might have changed (launched interceptors, missile defense) */
439 getship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
440 shipdamage(&mlp->unit.ship, dam);
441 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
442 if (!mlp->unit.ship.shp_own) {
443 emp_remque(&mlp->queue);
449 shp_damage(struct emp_qelem *list, int totdam, int wantflags,
450 int nowantflags, int x, int y)
452 struct emp_qelem *qp;
453 struct emp_qelem *next;
459 || !(count = shp_count(list, wantflags, nowantflags, x, y)))
461 dam = ldround((double)totdam / count, 1);
462 for (qp = list->q_back; qp != list; qp = next) {
464 mlp = (struct ulist *)qp;
465 if (mlp->unit.ship.shp_x != x || mlp->unit.ship.shp_y != y)
468 (mchr[mlp->unit.ship.shp_type].m_flags & wantflags) != wantflags)
471 mchr[mlp->unit.ship.shp_type].m_flags & nowantflags)
473 shp_damage_one(mlp, dam);
479 shp_contains(struct emp_qelem *list, int newx, int newy, int wantflags,
482 struct emp_qelem *qp;
483 struct emp_qelem *next;
486 for (qp = list->q_back; qp != list; qp = next) {
488 mlp = (struct ulist *)qp;
489 /* If the ship isn't in the requested sector, then continue */
490 if (newx != mlp->unit.ship.shp_x || newy != mlp->unit.ship.shp_y)
493 (mchr[mlp->unit.ship.shp_type].m_flags & wantflags) != wantflags)
496 mchr[mlp->unit.ship.shp_type].m_flags & nowantflags)
503 static struct ulist *
504 most_valuable_ship(struct emp_qelem *list, coord x, coord y)
506 struct emp_qelem *qp;
507 struct emp_qelem *next;
509 struct ulist *mvs = NULL;
511 for (qp = list->q_back; qp != list; qp = next) {
513 mlp = (struct ulist *)qp;
514 if (mlp->unit.ship.shp_x != x || mlp->unit.ship.shp_y != y)
516 if (mchr[mlp->unit.ship.shp_type].m_flags & M_SUB)
518 if (!mchr[mlp->unit.ship.shp_type].m_nxlight &&
519 !mchr[mlp->unit.ship.shp_type].m_nchoppers &&
520 mchr[mlp->unit.ship.shp_type].m_cost < 1000 &&
521 !mchr[mlp->unit.ship.shp_type].m_nplanes &&
522 !mchr[mlp->unit.ship.shp_type].m_nland)
528 if (mchr[mlp->unit.ship.shp_type].m_cost * mlp->unit.ship.shp_effic >
529 mchr[mvs->unit.ship.shp_type].m_cost * mvs->unit.ship.shp_effic)
536 shp_easiest_target(struct emp_qelem *list, int wantflags, int nowantflags)
538 struct emp_qelem *qp;
539 struct emp_qelem *next;
542 int easiest = 9876; /* things start great for victim */
545 for (qp = list->q_back; qp != list; qp = next) {
547 mlp = (struct ulist *)qp;
549 (mchr[mlp->unit.ship.shp_type].m_flags & wantflags) != wantflags)
552 mchr[mlp->unit.ship.shp_type].m_flags & nowantflags)
554 hard = shp_hardtarget(&mlp->unit.ship);
556 easiest = hard; /* things get worse for victim */
559 return easiest - count;
563 shp_missile_interdiction(struct emp_qelem *list, coord newx, coord newy,
568 struct emp_qelem msl_list, *qp, *newqp;
572 mvs = most_valuable_ship(list, newx, newy);
576 msl_sel(&msl_list, newx, newy, victim, P_T | P_MAR, 0, MI_INTERDICT);
578 for (qp = msl_list.q_back; qp != &msl_list; qp = newqp) {
580 plp = (struct plist *)qp;
582 if (mvs && mission_pln_equip(plp, NULL, 'p') >= 0) {
583 if (msl_launch(&plp->plane, EF_SHIP, prship(&mvs->unit.ship),
584 newx, newy, victim, &sublaunch) < 0)
587 if (msl_hit(&plp->plane,
588 shp_hardtarget(&mvs->unit.ship), EF_SHIP,
589 N_SHP_MISS, N_SHP_SMISS, sublaunch, victim)) {
590 dam = pln_damage(&plp->plane, 'p', 1);
592 "missile interdiction mission does %d damage to %s!\n",
593 dam, prship(&mvs->unit.ship));
594 shp_damage_one(mvs, dam);
596 dam = pln_damage(&plp->plane, 'p', 0);
597 collateral_damage(newx, newy, dam);
599 mvs = most_valuable_ship(list, newx, newy);
601 plp->plane.pln_effic = 0;
602 putplane(plp->plane.pln_uid, &plp->plane);
611 /* Note that this function has a side effect - it uses coastwatch
612 * ranges to see if it should fire upon a ship. So, this function
613 * is expected to return positive if a ship is in range, and 0 if a
614 * ship is not in range. */
616 notify_coastguard(struct emp_qelem *list, int trange, struct sctstr *sectp)
618 struct emp_qelem *qp;
619 struct emp_qelem *next;
624 natp = getnatp(sectp->sct_own);
626 vrange = sectp->sct_type == SCT_RADAR ? 14 : 4;
627 vrange *= tfact(sectp->sct_own, 1.0) * sectp->sct_effic / 100.0;
635 for (qp = list->q_back; qp != list; qp = next) {
637 mlp = (struct ulist *)qp;
638 if (mchr[mlp->unit.ship.shp_type].m_flags & M_SUB)
640 if (natp->nat_flags & NF_COASTWATCH)
641 wu(0, sectp->sct_own,
642 "%s %s sighted at %s\n",
643 cname(mlp->unit.ship.shp_own),
644 prship(&mlp->unit.ship),
645 xyas(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y,
648 setcont(sectp->sct_own, mlp->unit.ship.shp_own, FOUND_COAST);
655 shp_fort_interdiction(struct emp_qelem *list, coord newx, coord newy,
664 signed char notified[MAXNOC];
667 /* Inform neutral and worse */
668 for (i = 0; i < MAXNOC; ++i) {
669 if (relations_with(i, victim) <= NEUTRAL)
675 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
676 while (nxtsct(&ns, &fsect)) {
679 if (fsect.sct_own == victim)
681 if (notified[fsect.sct_own])
683 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
684 if (notify_coastguard(list, trange, &fsect))
685 notified[fsect.sct_own] = 1;
687 if (opt_NO_FORT_FIRE)
688 return 0; /* Only coastwatch notify in nofortfire */
689 /* Only fire at Hostile ships */
690 for (i = 0; i < MAXNOC; ++i) {
691 if (relations_with(i, victim) >= NEUTRAL)
694 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
695 while (nxtsct(&ns, &fsect)) {
696 if (!notified[fsect.sct_own])
698 range = roundrange(fortrange(&fsect));
699 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
702 dam = fort_fire(&fsect);
708 mpr(victim, "Incoming fire does %d damage!\n", dam);
710 mpr(victim, "%s fires at you for %d!\n",
711 xyas(fsect.sct_x, fsect.sct_y, victim), dam);
714 "%s fires at %s ships in %s for %d!\n",
715 xyas(fsect.sct_x, fsect.sct_y,
717 cname(victim), xyas(newx, newy, fsect.sct_own), dam);
718 nreport(fsect.sct_own, N_SHP_SHELL, victim, 1);
721 shp_damage(list, totdam, 0, M_SUB, newx, newy);
726 shp_mission_interdiction(struct emp_qelem *list, coord x, coord y,
727 natid victim, int subs)
729 char *what = subs ? "subs" : "ships";
730 int wantflags = subs ? M_SUB : 0;
731 int nowantflags = subs ? 0 : M_SUB;
732 int mission = subs ? MI_SINTERDICT : MI_INTERDICT;
735 dam = unit_interdict(x, y, victim, what,
736 shp_easiest_target(list, wantflags, nowantflags),
739 shp_damage(list, dam, wantflags, nowantflags, x, y);
744 shp_interdict(struct emp_qelem *list, coord newx, coord newy, natid victim)
748 if (shp_contains(list, newx, newy, 0, M_SUB)) {
749 stopping |= shp_fort_interdiction(list, newx, newy, victim);
751 if (shp_contains(list, newx, newy, 0, M_SUB)) {
752 stopping |= shp_mission_interdiction(list, newx, newy, victim, 0);
753 stopping |= shp_missile_interdiction(list, newx, newy, victim);
756 if (shp_contains(list, newx, newy, M_SUB, 0))
757 stopping |= shp_mission_interdiction(list, newx, newy, victim, 1);
761 /* high value of hardtarget is harder to hit */
763 shp_hardtarget(struct shpstr *sp)
767 struct mchrstr *mcp = mchr + sp->shp_type;
770 getsect(sp->shp_x, sp->shp_y, §);
771 onsea = sect.sct_type == SCT_WATER;
772 if (mcp->m_flags & M_SUB)
774 return (int)((sp->shp_effic / 100.0) *
775 (20 + shp_speed(sp) * onsea / 2.0 - vis));
779 shp_hit_mine(struct shpstr *sp)
783 mpr(sp->shp_own, "Kawhomp! Mine detected in %s!\n",
784 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
786 nreport(sp->shp_own, N_HIT_MINE, 0, 1);
789 if (mchr[sp->shp_type].m_flags & M_SWEEP)
792 shipdamage(sp, ldround(m, 1));
798 shp_nav_one_sector(struct emp_qelem *list, int dir, natid actor)
801 struct emp_qelem *qp;
802 struct emp_qelem *next;
809 enum shp_stuck stuck;
814 if (CANT_HAPPEN(QEMPTY(list)))
817 if (dir <= DIR_STOP || dir > DIR_LAST) {
818 CANT_HAPPEN(dir != DIR_STOP);
819 shp_nav_put(list, actor);
825 mlp = (struct ulist *)list->q_back;
826 newx = xnorm(mlp->unit.ship.shp_x + dx);
827 newy = ynorm(mlp->unit.ship.shp_y + dy);
828 getsect(newx, newy, §);
830 if (sect.sct_own && relations_with(sect.sct_own, actor) < FRIENDLY) {
831 mpr(actor, "can't go to %s\n", xyas(newx, newy, actor));
836 for (qp = list->q_back; qp != list; qp = next) {
838 mlp = (struct ulist *)qp;
839 switch (shp_check_nav(&mlp->unit.ship, §)) {
843 case SHP_STUCK_CANAL:
848 case SHP_STUCK_CONSTRUCTION:
849 case SHP_STUCK_IMPASSABLE:
850 mpr(actor, "can't go to %s\n", xyas(newx, newy, actor));
855 mpr(actor, "is too large to fit into the canal system at %s\n",
856 xyas(newx, newy, actor));
860 for (qp = list->q_back; qp != list; qp = next) {
862 mlp = (struct ulist *)qp;
863 stuck = shp_check_nav(&mlp->unit.ship, §);
864 if (stuck == SHP_STUCK_CANAL) {
866 "is too large to fit into the canal system at %s",
867 xyas(newx, newy, actor));
868 shp_stays(actor, dp, mlp);
870 } else if (CANT_HAPPEN(stuck != SHP_STUCK_NOT)) {
871 sprintf(dp, "can't go to %s", xyas(newx, newy, actor));
872 shp_stays(actor, dp, mlp);
876 if (mlp->mobil <= 0.0) {
877 shp_stays(actor, "is out of mobility", mlp);
880 mobcost = shp_mobcost(&mlp->unit.ship);
881 mlp->unit.ship.shp_x = newx;
882 mlp->unit.ship.shp_y = newy;
883 if (mlp->mobil - mobcost < -127) {
886 mlp->mobil -= mobcost;
888 mlp->unit.ship.shp_mobil = (int)mlp->mobil;
889 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
893 stopping |= shp_sweep(list, 0, 0, actor);
896 stopping |= shp_check_mines(list);
899 stopping |= shp_interdict(list, newx, newy, actor);
906 * Check for incoming missiles with a P_MAR flag.
907 * Return True=1 if the missile was shotdown.
910 * Chad Zabel, July 95
914 shp_missile_defense(coord dx, coord dy, natid bombown, int hardtarget)
919 double gun, eff, teff;
921 snxtitem_dist(&ni, EF_SHIP, dx, dy, 1);
923 while (nxtitem(&ni, &ship)) {
927 if (!(mchr[(int)ship.shp_type].m_flags & M_ANTIMISSILE))
930 if (relations_with(ship.shp_own, bombown) >= NEUTRAL)
933 if (ship.shp_effic < 60)
936 if (ship.shp_item[I_MILIT] < 1) /* do we have mil? */
938 if (ship.shp_item[I_GUN] < 1) /* we need at least 1 gun */
940 if (!shp_supply(&ship, I_SHELL, 2))
942 ship.shp_item[I_SHELL] -= 2;
943 putship(ship.shp_uid, &ship);
945 /* now calculate the odds */
946 gun = shp_usable_guns(&ship);
947 eff = ship.shp_effic / 100.0;
948 teff = ship.shp_tech / (ship.shp_tech + 200.0);
949 /* raise 4.5 for better interception -KHS */
950 hitchance = (int)(gun * eff * teff * 4.5) - hardtarget;
951 hitchance = LIMIT_TO(hitchance, 0, 100);
952 hit = pct_chance(hitchance);
954 mpr(bombown, "%s anti-missile system activated...%s\n",
956 hit ? "KABOOOM!! Missile destroyed\n"
957 : "SWOOSH!! anti-missile system failed!!");
958 mpr(ship.shp_own, "Ship #%i anti-missile system activated!\n",
960 mpr(ship.shp_own, "%d%% hitchance...%s\n", hitchance,
961 hit ? "KABOOOM!! Incoming missile destroyed!\n"
962 : "SWOOSH!! Missile evades anti-missile systems\n");
967 return 0; /* all attempts failed */
971 /* Fire missiles at a ship which has fired shells */
973 shp_missdef(struct shpstr *sp, natid victim)
975 struct emp_qelem list;
981 mlp = shp_insque(sp, &list);
982 sprintf(buf, "%s", prship(&mlp->unit.ship));
985 shp_missile_interdiction(&list, sp->shp_x, sp->shp_y, sp->shp_own);
986 getship(sp->shp_uid, sp);
990 "missiles launched in defense did 100%% damage to %s\n",
992 wu(0, victim, "%s sunk!\n", buf);
993 } else if (eff > 0 && sp->shp_effic < eff) {
995 "missiles launched in defense did %d%% damage to %s\n",
996 100 * (eff - sp->shp_effic) / eff, buf);
1003 shp_mobcost(struct shpstr *sp)
1005 return speed_factor(sp->shp_effic * 0.01 * shp_speed(sp),
1010 * Set SP's tech to TLEV along with everything else that depends on it.
1013 shp_set_tech(struct shpstr *sp, int tlev)
1015 struct mchrstr *mcp = mchr + sp->shp_type;
1017 if (CANT_HAPPEN(tlev < mcp->m_tech))
1020 sp->shp_tech = tlev;