games/rogue/pack.c

   1 /*      $NetBSD: pack.c,v 1.10 2008/01/14 03:50:02 dholland Exp $       */
   2
   3 /*
   4  * Copyright (c) 1988, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Timothy C. Stoehr.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. 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  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)pack.c      8.1 (Berkeley) 5/31/93";
  39 #else
  40 __RCSID("$NetBSD: pack.c,v 1.10 2008/01/14 03:50:02 dholland Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 /*
  45  * pack.c
  46  *
  47  * This source herein may be modified and/or distributed by anybody who
  48  * so desires, with the following restrictions:
  49  *    1.)  No portion of this notice shall be removed.
  50  *    2.)  Credit shall not be taken for the creation of this source.
  51  *    3.)  This code is not to be traded, sold, or used for personal
  52  *         gain or profit.
  53  *
  54  */
  55
  56 #include "rogue.h"
  57
  58 const char *curse_message = "you can't, it appears to be cursed";
  59
  60 static object *check_duplicate(object *, object *);
  61 static boolean is_pack_letter(short *, unsigned short *);
  62 static boolean mask_pack(const object *, unsigned short);
  63 static short next_avail_ichar(void);
  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)) != NULL) {
  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                 messagef(0, "you're floating in the air!");
 114                 return NULL;
 115         }
 116         obj = object_at(&level_objects, row, col);
 117         if (!obj) {
 118                 messagef(1, "pick_up(): inconsistent");
 119                 return(obj);
 120         }
 121         if (    (obj->what_is == SCROL) &&
 122                         (obj->which_kind == SCARE_MONSTER) &&
 123                         obj->picked_up) {
 124                 messagef(0, "the scroll turns to dust as you pick it up");
 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                 messagef(1, "pack too full");
 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                 messagef(0, "there's already something there");
 160                 return;
 161         }
 162         if (!rogue.pack.next_object) {
 163                 messagef(0, "you have nothing to drop");
 164                 return;
 165         }
 166         if ((ch = pack_letter("drop what?", ALL_OBJECTS)) == CANCEL) {
 167                 return;
 168         }
 169         if (!(obj = get_letter_object(ch))) {
 170                 messagef(0, "no such item.");
 171                 return;
 172         }
 173         if (obj->in_use_flags & BEING_WIELDED) {
 174                 if (obj->is_cursed) {
 175                         messagef(0, "%s", curse_message);
 176                         return;
 177                 }
 178                 unwield(rogue.weapon);
 179         } else if (obj->in_use_flags & BEING_WORN) {
 180                 if (obj->is_cursed) {
 181                         messagef(0, "%s", curse_message);
 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                         messagef(0, "%s", curse_message);
 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         get_desc(obj, desc, sizeof(desc));
 209         messagef(0, "dropped %s", desc);
 210         (void)reg_move();
 211 }
 212
 213 static object *
 214 check_duplicate(object *obj, object *pack)
 215 {
 216         object *op;
 217
 218         if (!(obj->what_is & (WEAPON | FOOD | SCROL | POTION))) {
 219                 return(0);
 220         }
 221         if ((obj->what_is == FOOD) && (obj->which_kind == FRUIT)) {
 222                 return(0);
 223         }
 224         op = pack->next_object;
 225
 226         while (op) {
 227                 if ((op->what_is == obj->what_is) &&
 228                         (op->which_kind == obj->which_kind)) {
 229
 230                         if ((obj->what_is != WEAPON) ||
 231                         ((obj->what_is == WEAPON) &&
 232                         ((obj->which_kind == ARROW) ||
 233                         (obj->which_kind == DAGGER) ||
 234                         (obj->which_kind == DART) ||
 235                         (obj->which_kind == SHURIKEN)) &&
 236                         (obj->quiver == op->quiver))) {
 237                                 op->quantity += obj->quantity;
 238                                 return(op);
 239                         }
 240                 }
 241                 op = op->next_object;
 242         }
 243         return(0);
 244 }
 245
 246 static short
 247 next_avail_ichar(void)
 248 {
 249         object *obj;
 250         int i;
 251         boolean ichars[26];
 252
 253         for (i = 0; i < 26; i++) {
 254                 ichars[i] = 0;
 255         }
 256         obj = rogue.pack.next_object;
 257         while (obj) {
 258                 if (obj->ichar >= 'a' && obj->ichar <= 'z') {
 259                         ichars[(obj->ichar - 'a')] = 1;
 260                 }
 261                 obj = obj->next_object;
 262         }
 263         for (i = 0; i < 26; i++) {
 264                 if (!ichars[i]) {
 265                         return(i + 'a');
 266                 }
 267         }
 268         return('?');
 269 }
 270
 271 void
 272 wait_for_ack(void)
 273 {
 274         while (rgetchar() != ' ')
 275                 ;
 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                 messagef(0, "nothing appropriate");
 286                 return(CANCEL);
 287         }
 288         for (;;) {
 289
 290                 messagef(0, "%s", prompt);
 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                         messagef(0, "%s", curse_message);
 323                 } else {
 324                         mv_aquatars();
 325                         obj = rogue.armor;
 326                         unwear(rogue.armor);
 327                         get_desc(obj, desc, sizeof(desc));
 328                         messagef(0, "was wearing %s", desc);
 329                         print_stats(STAT_ARMOR);
 330                         (void)reg_move();
 331                 }
 332         } else {
 333                 messagef(0, "not wearing any");
 334         }
 335 }
 336
 337 void
 338 wear(void)
 339 {
 340         short ch;
 341         object *obj;
 342         char desc[DCOLS];
 343
 344         if (rogue.armor) {
 345                 messagef(0, "you're already wearing some");
 346                 return;
 347         }
 348         ch = pack_letter("wear what?", ARMOR);
 349
 350         if (ch == CANCEL) {
 351                 return;
 352         }
 353         if (!(obj = get_letter_object(ch))) {
 354                 messagef(0, "no such item.");
 355                 return;
 356         }
 357         if (obj->what_is != ARMOR) {
 358                 messagef(0, "you can't wear that");
 359                 return;
 360         }
 361         obj->identified = 1;
 362         get_desc(obj, desc, sizeof(desc));
 363         messagef(0, "wearing %s", desc);
 364         do_wear(obj);
 365         print_stats(STAT_ARMOR);
 366         (void)reg_move();
 367 }
 368
 369 void
 370 unwear(object *obj)
 371 {
 372         if (obj) {
 373                 obj->in_use_flags &= (~BEING_WORN);
 374         }
 375         rogue.armor = NULL;
 376 }
 377
 378 void
 379 do_wear(object *obj)
 380 {
 381         rogue.armor = obj;
 382         obj->in_use_flags |= BEING_WORN;
 383         obj->identified = 1;
 384 }
 385
 386 void
 387 wield(void)
 388 {
 389         short ch;
 390         object *obj;
 391         char desc[DCOLS];
 392
 393         if (rogue.weapon && rogue.weapon->is_cursed) {
 394                 messagef(0, "%s", curse_message);
 395                 return;
 396         }
 397         ch = pack_letter("wield what?", WEAPON);
 398
 399         if (ch == CANCEL) {
 400                 return;
 401         }
 402         if (!(obj = get_letter_object(ch))) {
 403                 messagef(0, "No such item.");
 404                 return;
 405         }
 406         if (obj->what_is & (ARMOR | RING)) {
 407                 messagef(0, "you can't wield %s",
 408                         ((obj->what_is == ARMOR) ? "armor" : "rings"));
 409                 return;
 410         }
 411         if (obj->in_use_flags & BEING_WIELDED) {
 412                 messagef(0, "in use");
 413         } else {
 414                 unwield(rogue.weapon);
 415                 get_desc(obj, desc, sizeof(desc));
 416                 messagef(0, "wielding %s", desc);
 417                 do_wield(obj);
 418                 (void)reg_move();
 419         }
 420 }
 421
 422 void
 423 do_wield(object *obj)
 424 {
 425         rogue.weapon = obj;
 426         obj->in_use_flags |= BEING_WIELDED;
 427 }
 428
 429 void
 430 unwield(object *obj)
 431 {
 432         if (obj) {
 433                 obj->in_use_flags &= (~BEING_WIELDED);
 434         }
 435         rogue.weapon = NULL;
 436 }
 437
 438 void
 439 call_it(void)
 440 {
 441         short ch;
 442         object *obj;
 443         struct id *id_table;
 444         char buf[MAX_TITLE_LENGTH+2];
 445
 446         ch = pack_letter("call what?", (SCROL | POTION | WAND | RING));
 447
 448         if (ch == CANCEL) {
 449                 return;
 450         }
 451         if (!(obj = get_letter_object(ch))) {
 452                 messagef(0, "no such item.");
 453                 return;
 454         }
 455         if (!(obj->what_is & (SCROL | POTION | WAND | RING))) {
 456                 messagef(0, "surely you already know what that's called");
 457                 return;
 458         }
 459         id_table = get_id_table(obj);
 460
 461         if (get_input_line("call it:", "", buf, sizeof(buf),
 462                         id_table[obj->which_kind].title, 1, 1)) {
 463                 id_table[obj->which_kind].id_status = CALLED;
 464                 (void)strlcpy(id_table[obj->which_kind].title, buf,
 465                                 sizeof(id_table[obj->which_kind].title));
 466         }
 467 }
 468
 469 short
 470 pack_count(const object *new_obj)
 471 {
 472         object *obj;
 473         short count = 0;
 474
 475         obj = rogue.pack.next_object;
 476
 477         while (obj) {
 478                 if (obj->what_is != WEAPON) {
 479                         count += obj->quantity;
 480                 } else if (!new_obj) {
 481                         count++;
 482                 } else if ((new_obj->what_is != WEAPON) ||
 483                         ((obj->which_kind != ARROW) &&
 484                         (obj->which_kind != DAGGER) &&
 485                         (obj->which_kind != DART) &&
 486                         (obj->which_kind != SHURIKEN)) ||
 487                         (new_obj->which_kind != obj->which_kind) ||
 488                         (obj->quiver != new_obj->quiver)) {
 489                         count++;
 490                 }
 491                 obj = obj->next_object;
 492         }
 493         return(count);
 494 }
 495
 496 static boolean
 497 mask_pack(const object *pack, unsigned short mask)
 498 {
 499         while (pack->next_object) {
 500                 pack = pack->next_object;
 501                 if (pack->what_is & mask) {
 502                         return(1);
 503                 }
 504         }
 505         return(0);
 506 }
 507
 508 static boolean
 509 is_pack_letter(short *c, unsigned short *mask)
 510 {
 511         if (((*c == '?') || (*c == '!') || (*c == ':') || (*c == '=') ||
 512                 (*c == ')') || (*c == ']') || (*c == '/') || (*c == ','))) {
 513                 switch(*c) {
 514                 case '?':
 515                         *mask = SCROL;
 516                         break;
 517                 case '!':
 518                         *mask = POTION;
 519                         break;
 520                 case ':':
 521                         *mask = FOOD;
 522                         break;
 523                 case ')':
 524                         *mask = WEAPON;
 525                         break;
 526                 case ']':
 527                         *mask = ARMOR;
 528                         break;
 529                 case '/':
 530                         *mask = WAND;
 531                         break;
 532                 case '=':
 533                         *mask = RING;
 534                         break;
 535                 case ',':
 536                         *mask = AMULET;
 537                         break;
 538                 }
 539                 *c = LIST;
 540                 return(1);
 541         }
 542         return(((*c >= 'a') && (*c <= 'z')) || (*c == CANCEL) || (*c == LIST));
 543 }
 544
 545 boolean
 546 has_amulet(void)
 547 {
 548         return(mask_pack(&rogue.pack, AMULET));
 549 }
 550
 551 void
 552 kick_into_pack(void)
 553 {
 554         object *obj;
 555         char desc[DCOLS];
 556         short stat;
 557
 558         if (!(dungeon[rogue.row][rogue.col] & OBJECT)) {
 559                 messagef(0, "nothing here");
 560         } else {
 561                 if ((obj = pick_up(rogue.row, rogue.col, &stat)) != NULL) {
 562                         get_desc(obj, desc, sizeof(desc));
 563                         if (obj->what_is == GOLD) {
 564                                 messagef(0, "%s", desc);
 565                                 free_object(obj);
 566                         } else {
 567                                 messagef(0, "%s(%c)", desc, obj->ichar);
 568                         }
 569                 }
 570                 if (obj || (!stat)) {
 571                         (void)reg_move();
 572                 }
 573         }
 574 }