Generally use NULL instead of explicitly casting 0 to some pointer type (part2).
[dragonfly.git] / games / hack / hack.apply.c
1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
2 /* hack.apply.c - version 1.0.3 */
3 /* $FreeBSD: src/games/hack/hack.apply.c,v 1.4.2.1 2001/02/18 02:20:07 kris Exp $ */
4 /* $DragonFly: src/games/hack/hack.apply.c,v 1.4 2006/08/21 19:45:32 pavalos Exp $ */
5
6 #include        "hack.h"
7 #include        "def.edog.h"
8 extern char quitchars[];
9
10 static void              use_camera(struct obj *);
11 static bool              in_ice_box(struct obj *);
12 static bool              ck_ice_box(struct obj *);
13 static int               out_ice_box(struct obj *);
14 static void              use_ice_box(struct obj *);
15 static struct monst     *bchit(int, int, int, char);
16 static void              use_whistle(struct obj *);
17 static void              use_magic_whistle(struct obj *);
18 static bool              dig(void);
19 static int               use_pick_axe(struct obj *);
20
21 int
22 doapply(void)
23 {
24         struct obj *obj;
25         int res = 1;
26
27         obj = getobj("(", "use or apply");
28         if(!obj) return(0);
29
30         switch(obj->otyp){
31         case EXPENSIVE_CAMERA:
32                 use_camera(obj); break;
33         case ICE_BOX:
34                 use_ice_box(obj); break;
35         case PICK_AXE:
36                 res = use_pick_axe(obj);
37                 break;
38
39         case MAGIC_WHISTLE:
40                 if(pl_character[0] == 'W' || u.ulevel > 9) {
41                         use_magic_whistle(obj);
42                         break;
43                 }
44                 /* fall into next case */
45         case WHISTLE:
46                 use_whistle(obj);
47                 break;
48
49         case CAN_OPENER:
50                 if(!carrying(TIN)) {
51                         pline("You have no can to open.");
52                         goto xit;
53                 }
54                 pline("You cannot open a tin without eating its contents.");
55                 pline("In order to eat, use the 'e' command.");
56                 if(obj != uwep)
57     pline("Opening the tin will be much easier if you wield the can-opener.");
58                 goto xit;
59
60         default:
61                 pline("Sorry, I don't know how to use that.");
62         xit:
63                 nomul(0);
64                 return(0);
65         }
66         nomul(0);
67         return(res);
68 }
69
70 static void
71 use_camera(__unused struct obj *obj)
72 {
73 struct monst *mtmp;
74         if(!getdir(1)){         /* ask: in what direction? */
75                 flags.move = multi = 0;
76                 return;
77         }
78         if(u.uswallow) {
79                 pline("You take a picture of %s's stomach.", monnam(u.ustuck));
80                 return;
81         }
82         if(u.dz) {
83                 pline("You take a picture of the %s.",
84                         (u.dz > 0) ? "floor" : "ceiling");
85                 return;
86         }
87         if((mtmp = bchit(u.dx, u.dy, COLNO, '!'))) {
88                 if(mtmp->msleep){
89                         mtmp->msleep = 0;
90                         pline("The flash awakens %s.", monnam(mtmp)); /* a3 */
91                 } else
92                 if(mtmp->data->mlet != 'y')
93                 if(mtmp->mcansee || mtmp->mblinded){
94                         int tmp = dist(mtmp->mx,mtmp->my);
95                         int tmp2;
96                         if(cansee(mtmp->mx,mtmp->my))
97                           pline("%s is blinded by the flash!", Monnam(mtmp));
98                         setmangry(mtmp);
99                         if(tmp < 9 && !mtmp->isshk && rn2(4)) {
100                                 mtmp->mflee = 1;
101                                 if(rn2(4)) mtmp->mfleetim = rnd(100);
102                         }
103                         if(tmp < 3) mtmp->mcansee  = mtmp->mblinded = 0;
104                         else {
105                                 tmp2 = mtmp->mblinded;
106                                 tmp2 += rnd(1 + 50/tmp);
107                                 if(tmp2 > 127) tmp2 = 127;
108                                 mtmp->mblinded = tmp2;
109                                 mtmp->mcansee = 0;
110                         }
111                 }
112         }
113 }
114
115 static
116 struct obj *current_ice_box;    /* a local variable of use_ice_box, to be
117                                 used by its local procedures in/ck_ice_box */
118 static bool
119 in_ice_box(struct obj *obj)
120 {
121         if(obj == current_ice_box ||
122                 (Punished && (obj == uball || obj == uchain))){
123                 pline("You must be kidding.");
124                 return(0);
125         }
126         if(obj->owornmask & (W_ARMOR | W_RING)) {
127                 pline("You cannot refrigerate something you are wearing.");
128                 return(0);
129         }
130         if(obj->owt + current_ice_box->owt > 70) {
131                 pline("It won't fit.");
132                 return(1);      /* be careful! */
133         }
134         if(obj == uwep) {
135                 if(uwep->cursed) {
136                         pline("Your weapon is welded to your hand!");
137                         return(0);
138                 }
139                 setuwep(NULL);
140         }
141         current_ice_box->owt += obj->owt;
142         freeinv(obj);
143         obj->o_cnt_id = current_ice_box->o_id;
144         obj->nobj = fcobj;
145         fcobj = obj;
146         obj->age = moves - obj->age;    /* actual age */
147         return(1);
148 }
149
150 static bool
151 ck_ice_box(struct obj *obj)
152 {
153         return(obj->o_cnt_id == current_ice_box->o_id);
154 }
155
156 static int
157 out_ice_box(struct obj *obj)
158 {
159 struct obj *otmp;
160         if(obj == fcobj) fcobj = fcobj->nobj;
161         else {
162                 for(otmp = fcobj; otmp->nobj != obj; otmp = otmp->nobj)
163                         if(!otmp->nobj) panic("out_ice_box");
164                 otmp->nobj = obj->nobj;
165         }
166         current_ice_box->owt -= obj->owt;
167         obj->age = moves - obj->age;    /* simulated point of time */
168         addinv(obj);
169         return(0);
170 }
171
172 static void
173 use_ice_box(struct obj *obj)
174 {
175 int cnt = 0;
176 struct obj *otmp;
177         current_ice_box = obj;  /* for use by in/out_ice_box */
178         for(otmp = fcobj; otmp; otmp = otmp->nobj)
179                 if(otmp->o_cnt_id == obj->o_id)
180                         cnt++;
181         if(!cnt) pline("Your ice-box is empty.");
182         else {
183             pline("Do you want to take something out of the ice-box? [yn] ");
184             if(readchar() == 'y')
185                 if(askchain(fcobj, NULL, 0, out_ice_box, ck_ice_box, 0))
186                     return;
187                 pline("That was all. Do you wish to put something in? [yn] ");
188                 if(readchar() != 'y') return;
189         }
190         /* call getobj: 0: allow cnt; #: allow all types; %: expect food */
191         otmp = getobj("0#%", "put in");
192         if(!otmp || !in_ice_box(otmp))
193                 flags.move = multi = 0;
194 }
195
196 static struct monst *
197 bchit(int ddx, int ddy, int range, char sym)
198 {
199         struct monst *mtmp = NULL;
200         int bchx = u.ux, bchy = u.uy;
201
202         if(sym) Tmp_at(-1, sym);        /* open call */
203         while(range--) {
204                 bchx += ddx;
205                 bchy += ddy;
206                 if((mtmp = m_at(bchx,bchy)))
207                         break;
208                 if(!ZAP_POS(levl[bchx][bchy].typ)) {
209                         bchx -= ddx;
210                         bchy -= ddy;
211                         break;
212                 }
213                 if(sym) Tmp_at(bchx, bchy);
214         }
215         if(sym) Tmp_at(-1, -1);
216         return(mtmp);
217 }
218
219 static void
220 use_whistle(__unused struct obj *obj)
221 {
222 struct monst *mtmp = fmon;
223         pline("You produce a high whistling sound.");
224         while(mtmp) {
225                 if(dist(mtmp->mx,mtmp->my) < u.ulevel*20) {
226                         if(mtmp->msleep)
227                                 mtmp->msleep = 0;
228                         if(mtmp->mtame)
229                                 EDOG(mtmp)->whistletime = moves;
230                 }
231                 mtmp = mtmp->nmon;
232         }
233 }
234
235 static void
236 use_magic_whistle(__unused struct obj *obj)
237 {
238 struct monst *mtmp = fmon;
239         pline("You produce a strange whistling sound.");
240         while(mtmp) {
241                 if(mtmp->mtame) mnexto(mtmp);
242                 mtmp = mtmp->nmon;
243         }
244 }
245
246 static int dig_effort;  /* effort expended on current pos */
247 static uchar dig_level;
248 static coord dig_pos;
249 static boolean dig_down;
250
251 static bool
252 dig(void)
253 {
254         struct rm *lev;
255         int dpx = dig_pos.x, dpy = dig_pos.y;
256
257         /* perhaps a nymph stole his pick-axe while he was busy digging */
258         /* or perhaps he teleported away */
259         if(u.uswallow || !uwep || uwep->otyp != PICK_AXE ||
260             dig_level != dlevel ||
261             ((dig_down && (dpx != u.ux || dpy != u.uy)) ||
262              (!dig_down && dist(dpx,dpy) > 2)))
263                 return(0);
264
265         dig_effort += 10 + abon() + uwep->spe + rn2(5);
266         if(dig_down) {
267                 if(!xdnstair) {
268                         pline("The floor here seems too hard to dig in.");
269                         return(0);
270                 }
271                 if(dig_effort > 250) {
272                         dighole();
273                         return(0);      /* done with digging */
274                 }
275                 if(dig_effort > 50) {
276                         struct trap *ttmp = t_at(dpx,dpy);
277
278                         if(!ttmp) {
279                                 ttmp = maketrap(dpx,dpy,PIT);
280                                 ttmp->tseen = 1;
281                                 pline("You have dug a pit.");
282                                 u.utrap = rn1(4,2);
283                                 u.utraptype = TT_PIT;
284                                 return(0);
285                         }
286                 }
287         } else
288         if(dig_effort > 100) {
289                 const char *digtxt;
290                 struct obj *obj;
291
292                 lev = &levl[dpx][dpy];
293                 if((obj = sobj_at(ENORMOUS_ROCK, dpx, dpy))) {
294                         fracture_rock(obj);
295                         digtxt = "The rock falls apart.";
296                 } else if(!lev->typ || lev->typ == SCORR) {
297                         lev->typ = CORR;
298                         digtxt = "You succeeded in cutting away some rock.";
299                 } else if(lev->typ == HWALL || lev->typ == VWALL
300                                             || lev->typ == SDOOR) {
301                         lev->typ = xdnstair ? DOOR : ROOM;
302                         digtxt = "You just made an opening in the wall.";
303                 } else
304                   digtxt = "Now what exactly was it that you were digging in?";
305                 mnewsym(dpx, dpy);
306                 prl(dpx, dpy);
307                 pline("%s", digtxt);            /* after mnewsym & prl */
308                 return(0);
309         } else {
310                 if(IS_WALL(levl[dpx][dpy].typ)) {
311                         int rno = inroom(dpx,dpy);
312
313                         if(rno >= 0 && rooms[rno].rtype >= 8) {
314                           pline("This wall seems too hard to dig into.");
315                           return(0);
316                         }
317                 }
318                 pline("You hit the rock with all your might.");
319         }
320         return(1);
321 }
322
323 /* When will hole be finished? Very rough indication used by shopkeeper. */
324 int
325 holetime(void)
326 {
327         return( (occupation == dig) ? (250 - dig_effort)/20 : -1);
328 }
329
330 void
331 dighole(void)
332 {
333         struct trap *ttmp = t_at(u.ux, u.uy);
334
335         if(!xdnstair) {
336                 pline("The floor here seems too hard to dig in.");
337         } else {
338                 if(ttmp)
339                         ttmp->ttyp = TRAPDOOR;
340                 else
341                         ttmp = maketrap(u.ux, u.uy, TRAPDOOR);
342                 ttmp->tseen = 1;
343                 pline("You've made a hole in the floor.");
344                 if(!u.ustuck) {
345                         if(inshop())
346                                 shopdig(1);
347                         pline("You fall through ...");
348                         if(u.utraptype == TT_PIT) {
349                                 u.utrap = 0;
350                                 u.utraptype = 0;
351                         }
352                         goto_level(dlevel+1, FALSE);
353                 }
354         }
355 }
356
357 static int
358 use_pick_axe(struct obj *obj)
359 {
360         char dirsyms[12];
361         char *dsp = dirsyms, *sdp = sdir;
362         struct monst *mtmp;
363         struct rm *lev;
364         int rx, ry, res = 0;
365
366         if(obj != uwep) {
367                 if(uwep && uwep->cursed) {
368                         /* Andreas Bormann - ihnp4!decvax!mcvax!unido!ab */
369                         pline("Since your weapon is welded to your hand,");
370                         pline("you cannot use that pick-axe.");
371                         return(0);
372                 }
373                 pline("You now wield %s.", doname(obj));
374                 setuwep(obj);
375                 res = 1;
376         }
377         while(*sdp) {
378                 movecmd(*sdp);  /* sets u.dx and u.dy and u.dz */
379                 rx = u.ux + u.dx;
380                 ry = u.uy + u.dy;
381                 if(u.dz > 0 || (u.dz == 0 && isok(rx, ry) &&
382                     (IS_ROCK(levl[rx][ry].typ)
383                     || sobj_at(ENORMOUS_ROCK, rx, ry))))
384                         *dsp++ = *sdp;
385                 sdp++;
386         }
387         *dsp = 0;
388         pline("In what direction do you want to dig? [%s] ", dirsyms);
389         if(!getdir(0))          /* no txt */
390                 return(res);
391         if(u.uswallow && attack(u.ustuck)) /* return(1) */;
392         else
393         if(u.dz < 0)
394                 pline("You cannot reach the ceiling.");
395         else
396         if(u.dz == 0) {
397                 if(Confusion)
398                         confdir();
399                 rx = u.ux + u.dx;
400                 ry = u.uy + u.dy;
401                 if((mtmp = m_at(rx, ry)) && attack(mtmp))
402                         return(1);
403                 if(!isok(rx, ry)) {
404                         pline("Clash!");
405                         return(1);
406                 }
407                 lev = &levl[rx][ry];
408                 if(lev->typ == DOOR)
409                         pline("Your %s against the door.",
410                                 aobjnam(obj, "clang"));
411                 else if(!IS_ROCK(lev->typ)
412                      && !sobj_at(ENORMOUS_ROCK, rx, ry)) {
413                         /* ACCESSIBLE or POOL */
414                         pline("You swing your %s through thin air.",
415                                 aobjnam(obj, NULL));
416                 } else {
417                         if(dig_pos.x != rx || dig_pos.y != ry
418                             || dig_level != dlevel || dig_down) {
419                                 dig_down = FALSE;
420                                 dig_pos.x = rx;
421                                 dig_pos.y = ry;
422                                 dig_level = dlevel;
423                                 dig_effort = 0;
424                                 pline("You start digging.");
425                         } else
426                                 pline("You continue digging.");
427                         occupation = dig;
428                         occtxt = "digging";
429                 }
430         } else if(Levitation) {
431                 pline("You cannot reach the floor.");
432         } else {
433                 if(dig_pos.x != u.ux || dig_pos.y != u.uy
434                     || dig_level != dlevel || !dig_down) {
435                         dig_down = TRUE;
436                         dig_pos.x = u.ux;
437                         dig_pos.y = u.uy;
438                         dig_level = dlevel;
439                         dig_effort = 0;
440                         pline("You start digging in the floor.");
441                         if(inshop())
442                                 shopdig(0);
443                 } else
444                         pline("You continue digging in the floor.");
445                 occupation = dig;
446                 occtxt = "digging";
447         }
448         return(1);
449 }