games/rogue/pack.c

   1 /*
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Timothy C. Stoehr.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)pack.c   8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/rogue/pack.c,v 1.8 1999/11/30 03:49:25 billf Exp $
  38  * $DragonFly: src/games/rogue/pack.c,v 1.4 2006/09/02 19:31:07 pavalos Exp $
  39  */
  40
  41 /*
  42  * pack.c
  43  *
  44  * This source herein may be modified and/or distributed by anybody who
  45  * so desires, with the following restrictions:
  46  *    1.)  No portion of this notice shall be removed.
  47  *    2.)  Credit shall not be taken for the creation of this source.
  48  *    3.)  This code is not to be traded, sold, or used for personal
  49  *         gain or profit.
  50  *
  51  */
  52
  53 #include <unistd.h>
  54 #include "rogue.h"
  55
  56 const char *curse_message = "you can't, it appears to be cursed";
  57
  58 extern short levitate;
  59
  60 static object   *check_duplicate(object *, object *);
  61 static int      next_avail_ichar(void);
  62 static boolean  mask_pack(const object *, unsigned short);
  63 static boolean  is_pack_letter(short *, unsigned short *);
  64
  65 object *
  66 add_to_pack(object *obj, object *pack, int condense)
  67 {
  68         object *op;
  69
  70         if (condense) {
  71                 if ((op = check_duplicate(obj, pack))) {
  72                         free_object(obj);
  73                         return(op);
  74                 } else {
  75                         obj->ichar = next_avail_ichar();
  76                 }
  77         }
  78         if (pack->next_object == 0) {
  79                 pack->next_object = obj;
  80         } else {
  81                 op = pack->next_object;
  82
  83                 while (op->next_object) {
  84                         op = op->next_object;
  85                 }
  86                 op->next_object = obj;
  87         }
  88         obj->next_object = 0;
  89         return(obj);
  90 }
  91
  92 void
  93 take_from_pack(object *obj, object *pack)
  94 {
  95         while (pack->next_object != obj) {
  96                 pack = pack->next_object;
  97         }
  98         pack->next_object = pack->next_object->next_object;
  99 }
 100
 101 /* Note: *status is set to 0 if the rogue attempts to pick up a scroll
 102  * of scare-monster and it turns to dust.  *status is otherwise set to 1.
 103  */
 104
 105 object *
 106 pick_up(int row, int col, short *status)
 107 {
 108         object *obj;
 109
 110         *status = 1;
 111
 112         if (levitate) {
 113                 message("you're floating in the air!", 0);
 114                 return(NULL);
 115         }
 116         obj = object_at(&level_objects, row, col);
 117         if (!obj) {
 118                 message("pick_up(): inconsistent", 1);
 119                 return(obj);
 120         }
 121         if (    (obj->what_is == SCROL) &&
 122                         (obj->which_kind == SCARE_MONSTER) &&
 123                         obj->picked_up) {
 124                 message("the scroll turns to dust as you pick it up", 0);
 125                 dungeon[row][col] &= (~OBJECT);
 126                 vanish(obj, 0, &level_objects);
 127                 *status = 0;
 128                 if (id_scrolls[SCARE_MONSTER].id_status == UNIDENTIFIED) {
 129                         id_scrolls[SCARE_MONSTER].id_status = IDENTIFIED;
 130                 }
 131                 return(NULL);
 132         }
 133         if (obj->what_is == GOLD) {
 134                 rogue.gold += obj->quantity;
 135                 dungeon[row][col] &= ~(OBJECT);
 136                 take_from_pack(obj, &level_objects);
 137                 print_stats(STAT_GOLD);
 138                 return(obj);    /* obj will be free_object()ed in caller */
 139         }
 140         if (pack_count(obj) >= MAX_PACK_COUNT) {
 141                 message("pack too full", 1);
 142                 return(NULL);
 143         }
 144         dungeon[row][col] &= ~(OBJECT);
 145         take_from_pack(obj, &level_objects);
 146         obj = add_to_pack(obj, &rogue.pack, 1);
 147         obj->picked_up = 1;
 148         return(obj);
 149 }
 150
 151 void
 152 drop(void)
 153 {
 154         object *obj, *new;
 155         short ch;
 156         char desc[DCOLS];
 157
 158         if (dungeon[rogue.row][rogue.col] & (OBJECT | STAIRS | TRAP)) {
 159                 message("there's already something there", 0);
 160                 return;
 161         }
 162         if (!rogue.pack.next_object) {
 163                 message("you have nothing to drop", 0);
 164                 return;
 165         }
 166         if ((ch = pack_letter("drop what?", ALL_OBJECTS)) == CANCEL) {
 167                 return;
 168         }
 169         if (!(obj = get_letter_object(ch))) {
 170                 message("no such item.", 0);
 171                 return;
 172         }
 173         if (obj->in_use_flags & BEING_WIELDED) {
 174                 if (obj->is_cursed) {
 175                         message(curse_message, 0);
 176                         return;
 177                 }
 178                 unwield(rogue.weapon);
 179         } else if (obj->in_use_flags & BEING_WORN) {
 180                 if (obj->is_cursed) {
 181                         message(curse_message, 0);
 182                         return;
 183                 }
 184                 mv_aquatars();
 185                 unwear(rogue.armor);
 186                 print_stats(STAT_ARMOR);
 187         } else if (obj->in_use_flags & ON_EITHER_HAND) {
 188                 if (obj->is_cursed) {
 189                         message(curse_message, 0);
 190                         return;
 191                 }
 192                 un_put_on(obj);
 193         }
 194         obj->row = rogue.row;
 195         obj->col = rogue.col;
 196
 197         if ((obj->quantity > 1) && (obj->what_is != WEAPON)) {
 198                 obj->quantity--;
 199                 new = alloc_object();
 200                 *new = *obj;
 201                 new->quantity = 1;
 202                 obj = new;
 203         } else {
 204                 obj->ichar = 'L';
 205                 take_from_pack(obj, &rogue.pack);
 206         }
 207         place_at(obj, rogue.row, rogue.col);
 208         strcpy(desc, "dropped ");
 209         get_desc(obj, desc+8);
 210         message(desc, 0);
 211         reg_move();
 212 }
 213
 214 static object *
 215 check_duplicate(object *obj, object *pack)
 216 {
 217         object *op;
 218
 219         if (!(obj->what_is & (WEAPON | FOOD | SCROL | POTION))) {
 220                 return(0);
 221         }
 222         if ((obj->what_is == FOOD) && (obj->which_kind == FRUIT)) {
 223                 return(0);
 224         }
 225         op = pack->next_object;
 226
 227         while (op) {
 228                 if ((op->what_is == obj->what_is) &&
 229                         (op->which_kind == obj->which_kind)) {
 230
 231                         if ((obj->what_is != WEAPON) ||
 232                         ((obj->what_is == WEAPON) &&
 233                         ((obj->which_kind == ARROW) ||
 234                         (obj->which_kind == DAGGER) ||
 235                         (obj->which_kind == DART) ||
 236                         (obj->which_kind == SHURIKEN)) &&
 237                         (obj->quiver == op->quiver))) {
 238                                 op->quantity += obj->quantity;
 239                                 return(op);
 240                         }
 241                 }
 242                 op = op->next_object;
 243         }
 244         return(0);
 245 }
 246
 247 static int
 248 next_avail_ichar(void)
 249 {
 250         object *obj;
 251         int i;
 252         boolean ichars[26];
 253
 254         for (i = 0; i < 26; i++) {
 255                 ichars[i] = 0;
 256         }
 257         obj = rogue.pack.next_object;
 258         while (obj) {
 259                 ichars[(obj->ichar - 'a')] = 1;
 260                 obj = obj->next_object;
 261         }
 262         for (i = 0; i < 26; i++) {
 263                 if (!ichars[i]) {
 264                         return(i + 'a');
 265                 }
 266         }
 267         return('?');
 268 }
 269
 270 void
 271 wait_for_ack(void)
 272 {
 273         if (!isatty(0) || !isatty(1))
 274             return;
 275         while (rgetchar() != ' ') ;
 276 }
 277
 278 short
 279 pack_letter(const char *prompt, unsigned short mask)
 280 {
 281         short ch;
 282         unsigned short tmask = mask;
 283
 284         if (!mask_pack(&rogue.pack, mask)) {
 285                 message("nothing appropriate", 0);
 286                 return(CANCEL);
 287         }
 288         for (;;) {
 289
 290                 message(prompt, 0);
 291
 292                 for (;;) {
 293                         ch = rgetchar();
 294                         if (!is_pack_letter(&ch, &mask)) {
 295                                 sound_bell();
 296                         } else {
 297                                 break;
 298                         }
 299                 }
 300
 301                 if (ch == LIST) {
 302                         check_message();
 303                         mask = tmask;
 304                         inventory(&rogue.pack, mask);
 305                 } else {
 306                         break;
 307                 }
 308                 mask = tmask;
 309         }
 310         check_message();
 311         return(ch);
 312 }
 313
 314 void
 315 take_off(void)
 316 {
 317         char desc[DCOLS];
 318         object *obj;
 319
 320         if (rogue.armor) {
 321                 if (rogue.armor->is_cursed) {
 322                         message(curse_message, 0);
 323                 } else {
 324                         mv_aquatars();
 325                         obj = rogue.armor;
 326                         unwear(rogue.armor);
 327                         strcpy(desc, "was wearing ");
 328                         get_desc(obj, desc+12);
 329                         message(desc, 0);
 330                         print_stats(STAT_ARMOR);
 331                         reg_move();
 332                 }
 333         } else {
 334                 message("not wearing any", 0);
 335         }
 336 }
 337
 338 void
 339 wear(void)
 340 {
 341         short ch;
 342         object *obj;
 343         char desc[DCOLS];
 344
 345         if (rogue.armor) {
 346                 message("you're already wearing some", 0);
 347                 return;
 348         }
 349         ch = pack_letter("wear what?", ARMOR);
 350
 351         if (ch == CANCEL) {
 352                 return;
 353         }
 354         if (!(obj = get_letter_object(ch))) {
 355                 message("no such item.", 0);
 356                 return;
 357         }
 358         if (obj->what_is != ARMOR) {
 359                 message("you can't wear that", 0);
 360                 return;
 361         }
 362         obj->identified = 1;
 363         strcpy(desc, "wearing ");
 364         get_desc(obj, desc + 8);
 365         message(desc, 0);
 366         do_wear(obj);
 367         print_stats(STAT_ARMOR);
 368         reg_move();
 369 }
 370
 371 void
 372 unwear(object *obj)
 373 {
 374         if (obj) {
 375                 obj->in_use_flags &= (~BEING_WORN);
 376         }
 377         rogue.armor = NULL;
 378 }
 379
 380 void
 381 do_wear(object *obj)
 382 {
 383         rogue.armor = obj;
 384         obj->in_use_flags |= BEING_WORN;
 385         obj->identified = 1;
 386 }
 387
 388 void
 389 wield(void)
 390 {
 391         short ch;
 392         object *obj;
 393         char desc[DCOLS];
 394
 395         if (rogue.weapon && rogue.weapon->is_cursed) {
 396                 message(curse_message, 0);
 397                 return;
 398         }
 399         ch = pack_letter("wield what?", WEAPON);
 400
 401         if (ch == CANCEL) {
 402                 return;
 403         }
 404         if (!(obj = get_letter_object(ch))) {
 405                 message("No such item.", 0);
 406                 return;
 407         }
 408         if (obj->what_is & (ARMOR | RING)) {
 409                 sprintf(desc, "you can't wield %s",
 410                         ((obj->what_is == ARMOR) ? "armor" : "rings"));
 411                 message(desc, 0);
 412                 return;
 413         }
 414         if (obj->in_use_flags & BEING_WIELDED) {
 415                 message("in use", 0);
 416         } else {
 417                 unwield(rogue.weapon);
 418                 strcpy(desc, "wielding ");
 419                 get_desc(obj, desc + 9);
 420                 message(desc, 0);
 421                 do_wield(obj);
 422                 reg_move();
 423         }
 424 }
 425
 426 void
 427 do_wield(object *obj)
 428 {
 429         rogue.weapon = obj;
 430         obj->in_use_flags |= BEING_WIELDED;
 431 }
 432
 433 void
 434 unwield(object *obj)
 435 {
 436         if (obj) {
 437                 obj->in_use_flags &= (~BEING_WIELDED);
 438         }
 439         rogue.weapon = NULL;
 440 }
 441
 442 void
 443 call_it(void)
 444 {
 445         short ch;
 446         object *obj;
 447         struct id *id_table;
 448         char buf[MAX_TITLE_LENGTH+2];
 449
 450         ch = pack_letter("call what?", (SCROL | POTION | WAND | RING));
 451
 452         if (ch == CANCEL) {
 453                 return;
 454         }
 455         if (!(obj = get_letter_object(ch))) {
 456                 message("no such item.", 0);
 457                 return;
 458         }
 459         if (!(obj->what_is & (SCROL | POTION | WAND | RING))) {
 460                 message("surely you already know what that's called", 0);
 461                 return;
 462         }
 463         id_table = get_id_table(obj);
 464
 465         if (get_input_line("call it:","",buf,id_table[obj->which_kind].title,1,1)) {
 466                 id_table[obj->which_kind].id_status = CALLED;
 467                 strcpy(id_table[obj->which_kind].title, buf);
 468         }
 469 }
 470
 471 short
 472 pack_count(const object *new_obj)
 473 {
 474         object *obj;
 475         short count = 0;
 476
 477         obj = rogue.pack.next_object;
 478
 479         while (obj) {
 480                 if (obj->what_is != WEAPON) {
 481                         count += obj->quantity;
 482                 } else if (!new_obj) {
 483                         count++;
 484                 } else if ((new_obj->what_is != WEAPON) ||
 485                         ((obj->which_kind != ARROW) &&
 486                         (obj->which_kind != DAGGER) &&
 487                         (obj->which_kind != DART) &&
 488                         (obj->which_kind != SHURIKEN)) ||
 489                         (new_obj->which_kind != obj->which_kind) ||
 490                         (obj->quiver != new_obj->quiver)) {
 491                         count++;
 492                 }
 493                 obj = obj->next_object;
 494         }
 495         return(count);
 496 }
 497
 498 static boolean
 499 mask_pack(const object *pack, unsigned short mask)
 500 {
 501         while (pack->next_object) {
 502                 pack = pack->next_object;
 503                 if (pack->what_is & mask) {
 504                         return(1);
 505                 }
 506         }
 507         return(0);
 508 }
 509
 510 static boolean
 511 is_pack_letter(short *c, unsigned short *mask)
 512 {
 513         if (((*c == '?') || (*c == '!') || (*c == ':') || (*c == '=') ||
 514                 (*c == ')') || (*c == ']') || (*c == '/') || (*c == ','))) {
 515                 switch(*c) {
 516                 case '?':
 517                         *mask = SCROL;
 518                         break;
 519                 case '!':
 520                         *mask = POTION;
 521                         break;
 522                 case ':':
 523                         *mask = FOOD;
 524                         break;
 525                 case ')':
 526                         *mask = WEAPON;
 527                         break;
 528                 case ']':
 529                         *mask = ARMOR;
 530                         break;
 531                 case '/':
 532                         *mask = WAND;
 533                         break;
 534                 case '=':
 535                         *mask = RING;
 536                         break;
 537                 case ',':
 538                         *mask = AMULET;
 539                         break;
 540                 }
 541                 *c = LIST;
 542                 return(1);
 543         }
 544         return(((*c >= 'a') && (*c <= 'z')) || (*c == CANCEL) || (*c == LIST));
 545 }
 546
 547 boolean
 548 has_amulet(void)
 549 {
 550         return(mask_pack(&rogue.pack, AMULET));
 551 }
 552
 553 void
 554 kick_into_pack(void)
 555 {
 556         object *obj;
 557         char desc[DCOLS];
 558         short n, stat;
 559
 560         if (!(dungeon[rogue.row][rogue.col] & OBJECT)) {
 561                 message("nothing here", 0);
 562         } else {
 563                 if ((obj = pick_up(rogue.row, rogue.col, &stat))) {
 564                         get_desc(obj, desc);
 565                         if (obj->what_is == GOLD) {
 566                                 message(desc, 0);
 567                                 free_object(obj);
 568                         } else {
 569                                 n = strlen(desc);
 570                                 desc[n] = '(';
 571                                 desc[n+1] = obj->ichar;
 572                                 desc[n+2] = ')';
 573                                 desc[n+3] = 0;
 574                                 message(desc, 0);
 575                         }
 576                 }
 577                 if (obj || (!stat)) {
 578                         reg_move();
 579                 }
 580         }
 581 }