1 /* $OpenBSD: hack.dog.c,v 1.9 2016/01/09 18:33:15 mestre Exp $ */
2
3 /*
4 * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
5 * Amsterdam
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * - Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * - Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * - Neither the name of the Stichting Centrum voor Wiskunde en
20 * Informatica, nor the names of its contributors may be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
25 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
27 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
28 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 /*
38 * Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
39 * All rights reserved.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. The name of the author may not be used to endorse or promote products
50 * derived from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
53 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
54 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
55 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
56 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
57 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
58 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
59 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
60 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
61 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 */
63
64 #include "def.edog.h"
65 #include "hack.h"
66 #include "hack.mfndpos.h"
67
68 extern struct monst *makemon(struct permonst *, int, int);
69
70 static void initedog(struct monst *);
71 static int dogfood(struct obj *);
72
73 struct permonst li_dog =
74 { "little dog", 'd',2,18,6,1,6,sizeof(struct edog) };
75 struct permonst dog =
76 { "dog", 'd',4,16,5,1,6,sizeof(struct edog) };
77 struct permonst la_dog =
78 { "large dog", 'd',6,15,4,2,4,sizeof(struct edog) };
79
80
81 void
makedog(void)82 makedog(void)
83 {
84 struct monst *mtmp = makemon(&li_dog,u.ux,u.uy);
85
86 if(!mtmp) return; /* dogs were genocided */
87 initedog(mtmp);
88 }
89
90 void
initedog(struct monst * mtmp)91 initedog(struct monst *mtmp)
92 {
93 mtmp->mtame = mtmp->mpeaceful = 1;
94 EDOG(mtmp)->hungrytime = 1000 + moves;
95 EDOG(mtmp)->eattime = 0;
96 EDOG(mtmp)->droptime = 0;
97 EDOG(mtmp)->dropdist = 10000;
98 EDOG(mtmp)->apport = 10;
99 EDOG(mtmp)->whistletime = 0;
100 }
101
102 /* attach the monsters that went down (or up) together with @ */
103 struct monst *mydogs = 0;
104 struct monst *fallen_down = 0; /* monsters that fell through a trapdoor */
105 /* they will appear on the next level @ goes to, even if he goes up! */
106
107 void
losedogs(void)108 losedogs(void)
109 {
110 struct monst *mtmp;
111
112 while ((mtmp = mydogs)) {
113 mydogs = mtmp->nmon;
114 mtmp->nmon = fmon;
115 fmon = mtmp;
116 mnexto(mtmp);
117 }
118 while ((mtmp = fallen_down) ){
119 fallen_down = mtmp->nmon;
120 mtmp->nmon = fmon;
121 fmon = mtmp;
122 rloc(mtmp);
123 }
124 }
125
126 void
keepdogs(void)127 keepdogs(void)
128 {
129 struct monst *mtmp;
130
131 for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
132 if(dist(mtmp->mx,mtmp->my) < 3 && follower(mtmp)
133 && !mtmp->msleep && !mtmp->mfroz) {
134 relmon(mtmp);
135 mtmp->nmon = mydogs;
136 mydogs = mtmp;
137 unpmon(mtmp);
138 keepdogs(); /* we destroyed the link, so use recursion */
139 return; /* (admittedly somewhat primitive) */
140 }
141 }
142
143 void
fall_down(struct monst * mtmp)144 fall_down(struct monst *mtmp)
145 {
146 relmon(mtmp);
147 mtmp->nmon = fallen_down;
148 fallen_down = mtmp;
149 unpmon(mtmp);
150 mtmp->mtame = 0;
151 }
152
153 /* return quality of food; the lower the better */
154 #define DOGFOOD 0
155 #define CADAVER 1
156 #define ACCFOOD 2
157 #define MANFOOD 3
158 #define APPORT 4
159 #define POISON 5
160 #define UNDEF 6
161 static int
dogfood(struct obj * obj)162 dogfood(struct obj *obj)
163 {
164 switch(obj->olet) {
165 case FOOD_SYM:
166 return(
167 (obj->otyp == TRIPE_RATION) ? DOGFOOD :
168 (obj->otyp < CARROT) ? ACCFOOD :
169 (obj->otyp < CORPSE) ? MANFOOD :
170 (poisonous(obj) || obj->age + 50 <= moves ||
171 obj->otyp == DEAD_COCKATRICE)
172 ? POISON : CADAVER
173 );
174 default:
175 if(!obj->cursed) return(APPORT);
176 /* fall into next case */
177 case BALL_SYM:
178 case CHAIN_SYM:
179 case ROCK_SYM:
180 return(UNDEF);
181 }
182 }
183
184 /* return 0 (no move), 1 (move) or 2 (dead) */
185 int
dog_move(struct monst * mtmp,int after)186 dog_move(struct monst *mtmp, int after)
187 {
188 int nx, ny, omx, omy, appr, nearer, j;
189 int udist, chi, i, whappr;
190 struct monst *mtmp2;
191 struct permonst *mdat = mtmp->data;
192 struct edog *edog = EDOG(mtmp);
193 struct obj *obj;
194 struct trap *trap;
195 xchar cnt, chcnt, nix, niy;
196 schar dogroom, uroom;
197 xchar gx, gy, gtyp, otyp; /* current goal */
198 coord poss[9];
199 int info[9];
200 #define GDIST(x,y) ((x-gx)*(x-gx) + (y-gy)*(y-gy))
201 #define DDIST(x,y) ((x-omx)*(x-omx) + (y-omy)*(y-omy))
202
203 if(moves <= edog->eattime) return(0); /* dog is still eating */
204 omx = mtmp->mx;
205 omy = mtmp->my;
206 whappr = (moves - EDOG(mtmp)->whistletime < 5);
207 if(moves > edog->hungrytime + 500 && !mtmp->mconf){
208 mtmp->mconf = 1;
209 mtmp->mhpmax /= 3;
210 if(mtmp->mhp > mtmp->mhpmax)
211 mtmp->mhp = mtmp->mhpmax;
212 if(cansee(omx,omy))
213 pline("%s is confused from hunger.", Monnam(mtmp));
214 else pline("You feel worried about %s.", monnam(mtmp));
215 } else
216 if(moves > edog->hungrytime + 750 || mtmp->mhp < 1){
217 if(cansee(omx,omy))
218 pline("%s dies from hunger.", Monnam(mtmp));
219 else
220 pline("You have a sad feeling for a moment, then it passes.");
221 mondied(mtmp);
222 return(2);
223 }
224 dogroom = inroom(omx,omy);
225 uroom = inroom(u.ux,u.uy);
226 udist = dist(omx,omy);
227
228 /* maybe we tamed him while being swallowed --jgm */
229 if(!udist) return(0);
230
231 /* if we are carrying sth then we drop it (perhaps near @) */
232 /* Note: if apport == 1 then our behaviour is independent of udist */
233 if(mtmp->minvent){
234 if(!rn2(udist) || !rn2((int) edog->apport))
235 if(rn2(10) < edog->apport){
236 relobj(mtmp, (int) mtmp->minvis);
237 if(edog->apport > 1) edog->apport--;
238 edog->dropdist = udist; /* hpscdi!jon */
239 edog->droptime = moves;
240 }
241 } else {
242 if ((obj = o_at(omx,omy)))
243 if(!strchr("0_", obj->olet)){
244 if((otyp = dogfood(obj)) <= CADAVER){
245 nix = omx;
246 niy = omy;
247 goto eatobj;
248 }
249 if (obj->owt < 10*mtmp->data->mlevel)
250 if (rn2(20) < edog->apport+3)
251 if (rn2(udist) || !rn2((int) edog->apport)){
252 freeobj(obj);
253 unpobj(obj);
254 /* if(levl[omx][omy].scrsym == obj->olet)
255 newsym(omx,omy); */
256 mpickobj(mtmp,obj);
257 }
258 }
259 }
260
261 /* first we look for food */
262 gtyp = UNDEF; /* no goal as yet */
263 gx = gy = 0;
264 for(obj = fobj; obj; obj = obj->nobj) {
265 otyp = dogfood(obj);
266 if(otyp > gtyp || otyp == UNDEF) continue;
267 if(inroom(obj->ox,obj->oy) != dogroom) continue;
268 if(otyp < MANFOOD &&
269 (dogroom >= 0 || DDIST(obj->ox,obj->oy) < 10)) {
270 if(otyp < gtyp || (otyp == gtyp &&
271 DDIST(obj->ox,obj->oy) < DDIST(gx,gy))){
272 gx = obj->ox;
273 gy = obj->oy;
274 gtyp = otyp;
275 }
276 } else
277 if(gtyp == UNDEF && dogroom >= 0 &&
278 uroom == dogroom &&
279 !mtmp->minvent && edog->apport > rn2(8)){
280 gx = obj->ox;
281 gy = obj->oy;
282 gtyp = APPORT;
283 }
284 }
285 if(gtyp == UNDEF ||
286 (gtyp != DOGFOOD && gtyp != APPORT && moves < edog->hungrytime)){
287 if(dogroom < 0 || dogroom == uroom){
288 gx = u.ux;
289 gy = u.uy;
290 #ifndef QUEST
291 } else {
292 int tmp = rooms[(int)dogroom].fdoor;
293 cnt = rooms[(int)dogroom].doorct;
294
295 gx = gy = FAR; /* random, far away */
296 while(cnt--){
297 if(dist(gx,gy) >
298 dist(doors[tmp].x, doors[tmp].y)){
299 gx = doors[tmp].x;
300 gy = doors[tmp].y;
301 }
302 tmp++;
303 }
304 /* here gx == FAR e.g. when dog is in a vault */
305 if(gx == FAR || (gx == omx && gy == omy)){
306 gx = u.ux;
307 gy = u.uy;
308 }
309 #endif /* QUEST */
310 }
311 appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0;
312 if(after && udist <= 4 && gx == u.ux && gy == u.uy)
313 return(0);
314 if(udist > 1){
315 if (!IS_ROOM(levl[(int)u.ux][(int)u.uy].typ) || !rn2(4) ||
316 whappr ||
317 (mtmp->minvent && rn2((int) edog->apport)))
318 appr = 1;
319 }
320 /* if you have dog food he'll follow you more closely */
321 if (appr == 0) {
322 obj = invent;
323 while(obj){
324 if(obj->otyp == TRIPE_RATION){
325 appr = 1;
326 break;
327 }
328 obj = obj->nobj;
329 }
330 }
331 } else appr = 1; /* gtyp != UNDEF */
332 if(mtmp->mconf) appr = 0;
333
334 if(gx == u.ux && gy == u.uy && (dogroom != uroom || dogroom < 0)){
335 coord *cp;
336 cp = gettrack(omx,omy);
337 if(cp){
338 gx = cp->x;
339 gy = cp->y;
340 }
341 }
342
343 nix = omx;
344 niy = omy;
345 cnt = mfndpos(mtmp,poss,info,ALLOW_M | ALLOW_TRAPS);
346 chcnt = 0;
347 chi = -1;
348 for(i=0; i<cnt; i++){
349 nx = poss[i].x;
350 ny = poss[i].y;
351 if(info[i] & ALLOW_M){
352 mtmp2 = m_at(nx,ny);
353 if(mtmp2->data->mlevel >= mdat->mlevel+2 ||
354 mtmp2->data->mlet == 'c')
355 continue;
356 if(after) return(0); /* hit only once each move */
357
358 if(hitmm(mtmp, mtmp2) == 1 && rn2(4) &&
359 mtmp2->mlstmv != moves &&
360 hitmm(mtmp2,mtmp) == 2) return(2);
361 return(0);
362 }
363
364 /* dog avoids traps */
365 /* but perhaps we have to pass a trap in order to follow @ */
366 if((info[i] & ALLOW_TRAPS) && (trap = t_at(nx,ny))){
367 if(!trap->tseen && rn2(40)) continue;
368 if(rn2(10)) continue;
369 }
370
371 /* dog eschewes cursed objects */
372 /* but likes dog food */
373 obj = fobj;
374 while(obj){
375 if(obj->ox != nx || obj->oy != ny)
376 goto nextobj;
377 if(obj->cursed) goto nxti;
378 if(obj->olet == FOOD_SYM &&
379 (otyp = dogfood(obj)) < MANFOOD &&
380 (otyp < ACCFOOD || edog->hungrytime <= moves)){
381 /* Note: our dog likes the food so much that he
382 might eat it even when it conceals a cursed object */
383 nix = nx;
384 niy = ny;
385 chi = i;
386 eatobj:
387 edog->eattime =
388 moves + obj->quan * objects[obj->otyp].oc_delay;
389 if(edog->hungrytime < moves)
390 edog->hungrytime = moves;
391 edog->hungrytime +=
392 5*obj->quan * objects[obj->otyp].nutrition;
393 mtmp->mconf = 0;
394 if(cansee(nix,niy))
395 pline("%s ate %s.", Monnam(mtmp), doname(obj));
396 /* perhaps this was a reward */
397 if(otyp != CADAVER)
398 edog->apport += 200/(edog->dropdist+moves-edog->droptime);
399 delobj(obj);
400 goto newdogpos;
401 }
402 nextobj:
403 obj = obj->nobj;
404 }
405
406 for(j=0; j<MTSZ && j<cnt-1; j++)
407 if(nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y)
408 if(rn2(4*(cnt-j))) goto nxti;
409
410 /* Some stupid C compilers cannot compute the whole expression at once. */
411 nearer = GDIST(nx,ny);
412 nearer -= GDIST(nix,niy);
413 nearer *= appr;
414 if((nearer == 0 && !rn2(++chcnt)) || nearer<0 ||
415 (nearer > 0 && !whappr &&
416 ((omx == nix && omy == niy && !rn2(3))
417 || !rn2(12))
418 )){
419 nix = nx;
420 niy = ny;
421 if(nearer < 0) chcnt = 0;
422 chi = i;
423 }
424 nxti: ;
425 }
426 newdogpos:
427 if(nix != omx || niy != omy){
428 if(info[chi] & ALLOW_U){
429 (void) hitu(mtmp, d(mdat->damn, mdat->damd)+1);
430 return(0);
431 }
432 mtmp->mx = nix;
433 mtmp->my = niy;
434 for(j=MTSZ-1; j>0; j--) mtmp->mtrack[j] = mtmp->mtrack[j-1];
435 mtmp->mtrack[0].x = omx;
436 mtmp->mtrack[0].y = omy;
437 }
438 if(mintrap(mtmp) == 2) /* he died */
439 return(2);
440 pmon(mtmp);
441 return(1);
442 }
443
444 /* return roomnumber or -1 */
445 int
inroom(xchar x,xchar y)446 inroom(xchar x, xchar y)
447 {
448 #ifndef QUEST
449 struct mkroom *croom = &rooms[0];
450 while(croom->hx >= 0){
451 if(croom->hx >= x-1 && croom->lx <= x+1 &&
452 croom->hy >= y-1 && croom->ly <= y+1)
453 return(croom - rooms);
454 croom++;
455 }
456 #endif /* QUEST */
457 return(-1); /* not in room or on door */
458 }
459
460 int
tamedog(struct monst * mtmp,struct obj * obj)461 tamedog(struct monst *mtmp, struct obj *obj)
462 {
463 struct monst *mtmp2;
464
465 if(flags.moonphase == FULL_MOON && night() && rn2(6))
466 return(0);
467
468 /* If we cannot tame him, at least he's no longer afraid. */
469 mtmp->mflee = 0;
470 mtmp->mfleetim = 0;
471 if(mtmp->mtame || mtmp->mfroz ||
472 #ifndef NOWORM
473 mtmp->wormno ||
474 #endif /* NOWORM */
475 mtmp->isshk || mtmp->isgd || strchr(" &@12", mtmp->data->mlet))
476 return(0); /* no tame long worms? */
477 if(obj) {
478 if(dogfood(obj) >= MANFOOD) return(0);
479 if(cansee(mtmp->mx,mtmp->my)){
480 pline("%s devours the %s.", Monnam(mtmp),
481 objects[obj->otyp].oc_name);
482 }
483 obfree(obj, (struct obj *) 0);
484 }
485 mtmp2 = newmonst(sizeof(struct edog) + mtmp->mnamelth);
486 *mtmp2 = *mtmp;
487 mtmp2->mxlth = sizeof(struct edog);
488 if(mtmp->mnamelth)
489 (void) strlcpy(NAME(mtmp2), NAME(mtmp), mtmp2->mnamelth);
490 initedog(mtmp2);
491 replmon(mtmp,mtmp2);
492 return(1);
493 }
494