2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2014, 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 * retreat.c: Retreat subroutines
29 * Known contributors to this file:
46 #include "prototypes.h"
52 static int findcondition(char);
53 static int retreat_land1(struct lndstr *, char, int);
54 static int retreat_ship1(struct shpstr *, char, int);
61 static struct ccode conditions[] = {
62 { 'i', { "retreated with a damaged friend",
64 { 't', { "retreated with a torpedoed ship",
65 "was hit by a torpedo" } },
66 { 's', { "retreated with a ship scared by sonar",
67 "detected a sonar ping" } },
68 { 'h', { "retreated with a helpless ship",
69 "was fired upon with no one able to defend it" } },
70 { 'b', { "retreated with a bombed friend",
72 { 'd', { "retreated with a depth-charged ship",
73 "was depth-charged" } },
74 { 'u', { "retreated with a boarded ship", "was boarded" } },
75 { 0, { "panicked", "panicked"} }
79 check_retreat_and_do_shipdamage(struct shpstr *sp, int dam)
85 if (sp->shp_rflags & RET_INJURED)
86 retreat_ship(sp, 'i');
92 retreat_ship(struct shpstr *sp, char code)
97 if (sp->shp_rflags & RET_GROUP) {
98 snxtitem_group(&ni, EF_SHIP, sp->shp_fleet);
99 while (nxtitem(&ni, &ship))
100 if (ship.shp_own == sp->shp_own) {
101 if (ship.shp_uid == sp->shp_uid) {
102 retreat_ship1(sp, code, 1);
103 if (sp->shp_rpath[0] == 0)
106 retreat_ship1(&ship, code, 0);
107 getship(ship.shp_uid, &ship);
108 if (ship.shp_rpath[0] == 0) {
110 putship(ship.shp_uid, &ship);
115 retreat_ship1(sp, code, 1);
116 if (sp->shp_rpath[0] == 0)
122 retreat_ship1(struct shpstr *sp, char code, int orig)
125 /* Is this the originally scared ship, or a follower */
144 if (sp->shp_own == 0)
147 if (sp->shp_effic < SHIP_MINEFF) {
149 "%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
150 prship(sp), conditions[findcondition(code)].desc[orig]);
152 putship(sp->shp_uid, sp);
157 /* can't retreat a ship that's sailin, bad things happend */
160 "%s %s,\nbut had sailing orders, and couldn't retreat!\n",
161 prship(sp), conditions[findcondition(code)].desc[orig]);
163 putship(sp->shp_uid, sp);
167 /* check crew - uws don't count */
168 if (sp->shp_item[I_MILIT] == 0 && sp->shp_item[I_CIVIL] == 0) {
170 "%s %s,\nbut had no crew, and couldn't retreat!\n", prship(sp),
171 conditions[findcondition(code)].desc[orig]);
173 putship(sp->shp_uid, sp);
177 getsect(sp->shp_x, sp->shp_y, §);
178 switch (shp_check_nav(§, sp)) {
179 case CN_CONSTRUCTION:
181 "%s %s,\nbut was caught in a construction zone, and couldn't retreat!\n",
182 prship(sp), conditions[findcondition(code)].desc[orig]);
184 putship(sp->shp_uid, sp);
188 "%s %s,\nbut was landlocked, and couldn't retreat!\n",
189 prship(sp), conditions[findcondition(code)].desc[orig]);
191 putship(sp->shp_uid, sp);
199 "%s %s,\nbut was subject to an empire error, and couldn't retreat!\n",
200 prship(sp), conditions[findcondition(code)].desc[orig]);
202 putship(sp->shp_uid, sp);
207 if (sp->shp_mobil <= 0.0) {
209 "%s %s,\nbut had no mobility, and couldn't retreat!\n",
210 prship(sp), conditions[findcondition(code)].desc[orig]);
212 putship(sp->shp_uid, sp);
218 while (!stopping && n) {
220 if (sp->shp_rpath[0] == 0) {
224 if (sp->shp_mobil <= 0.0) {
226 "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
227 prship(sp), conditions[findcondition(code)].desc[orig]);
229 putship(sp->shp_uid, sp);
232 dir = chkdir(sp->shp_rpath[0], DIR_STOP, DIR_LAST);
233 memmove(sp->shp_rpath, sp->shp_rpath+1, sizeof(sp->shp_rpath) - 1);
244 mcp = &mchr[(int)sp->shp_type];
245 newx = xnorm(sp->shp_x + dx);
246 newy = ynorm(sp->shp_y + dy);
247 mobcost = shp_mobcost(sp);
249 getsect(newx, newy, §);
250 if (shp_check_nav(§, sp) != CN_NAVIGABLE ||
252 && relations_with(sect.sct_own, sp->shp_own) < FRIENDLY)) {
253 wu(0, sp->shp_own, "%s %s,\nbut could not retreat to %s!\n",
254 prship(sp), conditions[findcondition(code)].desc[orig],
255 xyas(newx, newy, sp->shp_own));
257 putship(sp->shp_uid, sp);
262 sp->shp_mobil -= mobcost;
266 mines = sect.sct_mines;
268 if (sect.sct_type != SCT_WATER || mines <= 0)
270 if (mcp->m_flags & M_SWEEP) {
271 max = mcp->m_item[I_SHELL];
272 shells = sp->shp_item[I_SHELL];
273 for (m = 0; mines > 0 && m < 5; m++) {
276 shells = MIN(max, shells + 1);
277 changed |= map_set(sp->shp_own, sp->shp_x, sp->shp_y,
281 if (sect.sct_mines != mines) {
283 "%s cleared %d mine%s in %s while retreating\n",
284 prship(sp), sect.sct_mines - mines,
285 splur(sect.sct_mines - mines),
286 xyas(newx, newy, sp->shp_own));
287 sect.sct_mines = mines;
288 sp->shp_item[I_SHELL] = shells;
292 writemap(sp->shp_own);
294 if (chance(DMINE_HITCHANCE(mines))) {
296 "%s %s,\nand hit a mine in %s while retreating!\n",
297 prship(sp), conditions[findcondition(code)].desc[orig],
298 xyas(newx, newy, sp->shp_own));
299 nreport(sp->shp_own, N_HIT_MINE, 0, 1);
303 if (map_set(sp->shp_own, sp->shp_x, sp->shp_y, 'X', 0))
304 writemap(sp->shp_own);
305 sect.sct_mines = mines;
308 putship(sp->shp_uid, sp);
314 wu(0, sp->shp_own, "%s %s, and retreated to %s\n",
315 prship(sp), conditions[findcondition(code)].desc[orig],
316 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
318 wu(0, sp->shp_own, "%s %s, and ended up at %s\n",
320 conditions[findcondition(code)].desc[orig],
321 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
324 putship(sp->shp_uid, sp);
329 findcondition(char code)
333 for (i = 0; conditions[i].code && conditions[i].code != code; i++) ;
334 CANT_HAPPEN(!conditions[i].code);
339 check_retreat_and_do_landdamage(struct lndstr *lp, int dam)
345 if (lp->lnd_rflags & RET_INJURED)
346 retreat_land(lp, 'i');
352 retreat_land(struct lndstr *lp, char code)
357 if (lp->lnd_rflags & RET_GROUP) {
358 snxtitem_group(&ni, EF_SHIP, lp->lnd_army);
359 while (nxtitem(&ni, &land))
360 if (land.lnd_own == lp->lnd_own) {
361 if (land.lnd_uid == lp->lnd_uid) {
362 retreat_land1(lp, code, 1);
363 if (lp->lnd_rpath[0] == 0)
366 retreat_land1(&land, code, 0);
367 getland(land.lnd_uid, &land);
368 if (land.lnd_rpath[0] == 0) {
370 putland(land.lnd_uid, &land);
375 retreat_land1(lp, code, 1);
376 if (lp->lnd_rpath[0] == 0)
382 retreat_land1(struct lndstr *lp, char code, int orig)
385 /* Is this the originally scared unit, or a follower */
403 if (lp->lnd_own == 0)
406 if (lp->lnd_effic < LAND_MINEFF) {
408 "%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
409 prland(lp), conditions[findcondition(code)].desc[orig]);
411 putland(lp->lnd_uid, lp);
415 getsect(lp->lnd_x, lp->lnd_y, §);
417 if (lp->lnd_mobil <= 0.0) {
419 "%s %s,\nbut had no mobility, and couldn't retreat!\n",
420 prland(lp), conditions[findcondition(code)].desc[orig]);
422 putland(lp->lnd_uid, lp);
428 while (!stopping && n) {
430 if (lp->lnd_rpath[0] == 0) {
434 if (lp->lnd_mobil <= 0.0) {
436 "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
437 prland(lp), conditions[findcondition(code)].desc[orig]);
439 putland(lp->lnd_uid, lp);
442 dir = chkdir(lp->lnd_rpath[0], DIR_STOP, DIR_LAST);
443 memmove(lp->lnd_rpath, lp->lnd_rpath+1, sizeof(lp->lnd_rpath) - 1);
454 lcp = &lchr[(int)lp->lnd_type];
455 newx = xnorm(lp->lnd_x + dx);
456 newy = ynorm(lp->lnd_y + dy);
458 getsect(newx, newy, §);
459 mobcost = lnd_mobcost(lp, §);
461 || sect.sct_type == SCT_MOUNT
462 || sect.sct_own != lp->lnd_own) {
463 wu(0, lp->lnd_own, "%s %s,\nbut could not retreat to %s!\n",
465 conditions[findcondition(code)].desc[orig],
466 xyas(newx, newy, lp->lnd_own));
468 putland(lp->lnd_uid, lp);
473 lp->lnd_mobil -= mobcost;
477 mines = SCT_LANDMINES(§);
478 if (mines <= 0 || sect.sct_oldown == lp->lnd_own)
480 if (lcp->l_flags & L_ENGINEER) {
481 max = lcp->l_item[I_SHELL];
482 shells = lp->lnd_item[I_SHELL];
483 for (m = 0; mines > 0 && m < 5; m++) {
486 shells = MIN(max, shells + 1);
489 sect.sct_mines = mines;
490 lp->lnd_item[I_SHELL] = shells;
493 if (chance(DMINE_LHITCHANCE(mines))) {
495 "%s %s,\nand hit a mine in %s while retreating!\n",
497 conditions[findcondition(code)].desc[orig],
498 xyas(newx, newy, lp->lnd_own));
499 nreport(lp->lnd_own, N_LHIT_MINE, 0, 1);
501 if (lcp->l_flags & L_ENGINEER)
505 sect.sct_mines = mines;
508 putland(lp->lnd_uid, lp);
514 wu(0, lp->lnd_own, "%s %s, and retreated to %s\n",
516 conditions[findcondition(code)].desc[orig],
517 xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
519 wu(0, lp->lnd_own, "%s %s, and ended up at %s\n",
521 conditions[findcondition(code)].desc[orig],
522 xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
525 putland(lp->lnd_uid, lp);