games/rogue/use.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. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#)use.c    8.1 (Berkeley) 5/31/93
  33  * $FreeBSD: src/games/rogue/use.c,v 1.4 1999/11/30 03:49:29 billf Exp $
  34  * $DragonFly: src/games/rogue/use.c,v 1.4 2006/09/02 19:31:07 pavalos Exp $
  35  */
  36
  37 /*
  38  * use.c
  39  *
  40  * This source herein may be modified and/or distributed by anybody who
  41  * so desires, with the following restrictions:
  42  *    1.)  No portion of this notice shall be removed.
  43  *    2.)  Credit shall not be taken for the creation of this source.
  44  *    3.)  This code is not to be traded, sold, or used for personal
  45  *         gain or profit.
  46  *
  47  */
  48
  49 #include "rogue.h"
  50
  51 short halluc = 0;
  52 short blind = 0;
  53 short confused = 0;
  54 short levitate = 0;
  55 short haste_self = 0;
  56 boolean see_invisible = 0;
  57 short extra_hp = 0;
  58 boolean detect_monster = 0;
  59 boolean con_mon = 0;
  60 const char *strange_feeling = "you have a strange feeling for a moment, then it passes";
  61
  62 extern short bear_trap;
  63 extern short cur_room;
  64 extern long level_points[];
  65 extern boolean being_held;
  66 extern char *fruit, *you_can_move_again;
  67 extern boolean sustain_strength;
  68
  69 static const char *get_ench_color(void);
  70 static void go_blind(void);
  71 static void hold_monster(void);
  72 static void idntfy(void);
  73 static void potion_heal(boolean);
  74 static void uncurse_all(void);
  75
  76 void
  77 quaff(void)
  78 {
  79         short ch;
  80         char buf[80];
  81         object *obj;
  82
  83         ch = pack_letter("quaff what?", POTION);
  84
  85         if (ch == CANCEL) {
  86                 return;
  87         }
  88         if (!(obj = get_letter_object(ch))) {
  89                 message("no such item.", 0);
  90                 return;
  91         }
  92         if (obj->what_is != POTION) {
  93                 message("you can't drink that", 0);
  94                 return;
  95         }
  96         switch(obj->which_kind) {
  97                 case INCREASE_STRENGTH:
  98                         message("you feel stronger now, what bulging muscles!",
  99                         0);
 100                         rogue.str_current++;
 101                         if (rogue.str_current > rogue.str_max) {
 102                                 rogue.str_max = rogue.str_current;
 103                         }
 104                         break;
 105                 case RESTORE_STRENGTH:
 106                         rogue.str_current = rogue.str_max;
 107                         message("this tastes great, you feel warm all over", 0);
 108                         break;
 109                 case HEALING:
 110                         message("you begin to feel better", 0);
 111                         potion_heal(0);
 112                         break;
 113                 case EXTRA_HEALING:
 114                         message("you begin to feel much better", 0);
 115                         potion_heal(1);
 116                         break;
 117                 case POISON:
 118                         if (!sustain_strength) {
 119                                 rogue.str_current -= get_rand(1, 3);
 120                                 if (rogue.str_current < 1) {
 121                                         rogue.str_current = 1;
 122                                 }
 123                         }
 124                         message("you feel very sick now", 0);
 125                         if (halluc) {
 126                                 unhallucinate();
 127                         }
 128                         break;
 129                 case RAISE_LEVEL:
 130                         rogue.exp_points = level_points[rogue.exp - 1];
 131                         message("you suddenly feel much more skillful", 0);
 132                         add_exp(1, 1);
 133                         break;
 134                 case BLINDNESS:
 135                         go_blind();
 136                         break;
 137                 case HALLUCINATION:
 138                         message("oh wow, everything seems so cosmic", 0);
 139                         halluc += get_rand(500, 800);
 140                         break;
 141                 case DETECT_MONSTER:
 142                         show_monsters();
 143                         if (!(level_monsters.next_monster)) {
 144                                 message(strange_feeling, 0);
 145                         }
 146                         break;
 147                 case DETECT_OBJECTS:
 148                         if (level_objects.next_object) {
 149                                 if (!blind) {
 150                                         show_objects();
 151                                 }
 152                         } else {
 153                                 message(strange_feeling, 0);
 154                         }
 155                         break;
 156                 case CONFUSION:
 157                         message((halluc ? "what a trippy feeling" :
 158                         "you feel confused"), 0);
 159                         cnfs();
 160                         break;
 161                 case LEVITATION:
 162                         message("you start to float in the air", 0);
 163                         levitate += get_rand(15, 30);
 164                         bear_trap = being_held = 0;
 165                         break;
 166                 case HASTE_SELF:
 167                         message("you feel yourself moving much faster", 0);
 168                         haste_self += get_rand(11, 21);
 169                         if (!(haste_self % 2)) {
 170                                 haste_self++;
 171                         }
 172                         break;
 173                 case SEE_INVISIBLE:
 174                         sprintf(buf, "hmm, this potion tastes like %sjuice", fruit);
 175                         message(buf, 0);
 176                         if (blind) {
 177                                 unblind();
 178                         }
 179                         see_invisible = 1;
 180                         relight();
 181                         break;
 182         }
 183         print_stats((STAT_STRENGTH | STAT_HP));
 184         if (id_potions[obj->which_kind].id_status != CALLED) {
 185                 id_potions[obj->which_kind].id_status = IDENTIFIED;
 186         }
 187         vanish(obj, 1, &rogue.pack);
 188 }
 189
 190 void
 191 read_scroll(void)
 192 {
 193         short ch;
 194         object *obj;
 195         char msg[DCOLS];
 196
 197         ch = pack_letter("read what?", SCROL);
 198
 199         if (ch == CANCEL) {
 200                 return;
 201         }
 202         if (!(obj = get_letter_object(ch))) {
 203                 message("no such item.", 0);
 204                 return;
 205         }
 206         if (obj->what_is != SCROL) {
 207                 message("you can't read that", 0);
 208                 return;
 209         }
 210         switch(obj->which_kind) {
 211                 case SCARE_MONSTER:
 212                         message("you hear a maniacal laughter in the distance",
 213                         0);
 214                         break;
 215                 case HOLD_MONSTER:
 216                         hold_monster();
 217                         break;
 218                 case ENCH_WEAPON:
 219                         if (rogue.weapon) {
 220                                 if (rogue.weapon->what_is == WEAPON) {
 221                                         sprintf(msg, "your %sglow%s %sfor a moment",
 222                                         name_of(rogue.weapon),
 223                                         ((rogue.weapon->quantity <= 1) ? "s" : ""),
 224                                         get_ench_color());
 225                                         message(msg, 0);
 226                                         if (coin_toss()) {
 227                                                 rogue.weapon->hit_enchant++;
 228                                         } else {
 229                                                 rogue.weapon->d_enchant++;
 230                                         }
 231                                 }
 232                                 rogue.weapon->is_cursed = 0;
 233                         } else {
 234                                 message("your hands tingle", 0);
 235                         }
 236                         break;
 237                 case ENCH_ARMOR:
 238                         if (rogue.armor) {
 239                                 sprintf(msg, "your armor glows %sfor a moment",
 240                                 get_ench_color());
 241                                 message(msg, 0);
 242                                 rogue.armor->d_enchant++;
 243                                 rogue.armor->is_cursed = 0;
 244                                 print_stats(STAT_ARMOR);
 245                         } else {
 246                                 message("your skin crawls", 0);
 247                         }
 248                         break;
 249                 case IDENTIFY:
 250                         message("this is a scroll of identify", 0);
 251                         obj->identified = 1;
 252                         id_scrolls[obj->which_kind].id_status = IDENTIFIED;
 253                         idntfy();
 254                         break;
 255                 case TELEPORT:
 256                         tele();
 257                         break;
 258                 case SLEEP:
 259                         message("you fall asleep", 0);
 260                         take_a_nap();
 261                         break;
 262                 case PROTECT_ARMOR:
 263                         if (rogue.armor) {
 264                                 message( "your armor is covered by a shimmering gold shield",0);
 265                                 rogue.armor->is_protected = 1;
 266                                 rogue.armor->is_cursed = 0;
 267                         } else {
 268                                 message("your acne seems to have disappeared", 0);
 269                         }
 270                         break;
 271                 case REMOVE_CURSE:
 272                                 message((!halluc) ?
 273                                         "you feel as though someone is watching over you" :
 274                                         "you feel in touch with the universal oneness", 0);
 275                         uncurse_all();
 276                         break;
 277                 case CREATE_MONSTER:
 278                         create_monster();
 279                         break;
 280                 case AGGRAVATE_MONSTER:
 281                         aggravate();
 282                         break;
 283                 case MAGIC_MAPPING:
 284                         message("this scroll seems to have a map on it", 0);
 285                         draw_magic_map();
 286                         break;
 287                 case CON_MON:
 288                         con_mon = 1;
 289                         sprintf(msg, "your hands glow %sfor a moment", get_ench_color());
 290                         message(msg, 0);
 291                         break;
 292         }
 293         if (id_scrolls[obj->which_kind].id_status != CALLED) {
 294                 id_scrolls[obj->which_kind].id_status = IDENTIFIED;
 295         }
 296         vanish(obj, (obj->which_kind != SLEEP), &rogue.pack);
 297 }
 298
 299 /* vanish() does NOT handle a quiver of weapons with more than one
 300  *  arrow (or whatever) in the quiver.  It will only decrement the count.
 301  */
 302
 303 void
 304 vanish(object *obj, short rm, object *pack)
 305 {
 306         if (obj->quantity > 1) {
 307                 obj->quantity--;
 308         } else {
 309                 if (obj->in_use_flags & BEING_WIELDED) {
 310                         unwield(obj);
 311                 } else if (obj->in_use_flags & BEING_WORN) {
 312                         unwear(obj);
 313                 } else if (obj->in_use_flags & ON_EITHER_HAND) {
 314                         un_put_on(obj);
 315                 }
 316                 take_from_pack(obj, pack);
 317                 free_object(obj);
 318         }
 319         if (rm) {
 320                 reg_move();
 321         }
 322 }
 323
 324 static void
 325 potion_heal(boolean extra)
 326 {
 327         float ratio;
 328         short add;
 329
 330         rogue.hp_current += rogue.exp;
 331
 332         ratio = ((float)rogue.hp_current) / rogue.hp_max;
 333
 334         if (ratio >= 1.00) {
 335                 rogue.hp_max += (extra ? 2 : 1);
 336                 extra_hp += (extra ? 2 : 1);
 337                 rogue.hp_current = rogue.hp_max;
 338         } else if (ratio >= 0.90) {
 339                 rogue.hp_max += (extra ? 1 : 0);
 340                 extra_hp += (extra ? 1 : 0);
 341                 rogue.hp_current = rogue.hp_max;
 342         } else {
 343                 if (ratio < 0.33) {
 344                         ratio = 0.33;
 345                 }
 346                 if (extra) {
 347                         ratio += ratio;
 348                 }
 349                 add = (short)(ratio * ((float)rogue.hp_max - rogue.hp_current));
 350                 rogue.hp_current += add;
 351                 if (rogue.hp_current > rogue.hp_max) {
 352                         rogue.hp_current = rogue.hp_max;
 353                 }
 354         }
 355         if (blind) {
 356                 unblind();
 357         }
 358         if (confused && extra) {
 359                 unconfuse();
 360         } else if (confused) {
 361                 confused = (confused / 2) + 1;
 362         }
 363         if (halluc && extra) {
 364                 unhallucinate();
 365         } else if (halluc) {
 366                 halluc = (halluc / 2) + 1;
 367         }
 368 }
 369
 370 static void
 371 idntfy(void)
 372 {
 373         short ch;
 374         object *obj;
 375         struct id *id_table;
 376         char desc[DCOLS];
 377 AGAIN:
 378         ch = pack_letter("what would you like to identify?", ALL_OBJECTS);
 379
 380         if (ch == CANCEL) {
 381                 return;
 382         }
 383         if (!(obj = get_letter_object(ch))) {
 384                 message("no such item, try again", 0);
 385                 message("", 0);
 386                 check_message();
 387                 goto AGAIN;
 388         }
 389         obj->identified = 1;
 390         if (obj->what_is & (SCROL | POTION | WEAPON | ARMOR | WAND | RING)) {
 391                 id_table = get_id_table(obj);
 392                 id_table[obj->which_kind].id_status = IDENTIFIED;
 393         }
 394         get_desc(obj, desc);
 395         message(desc, 0);
 396 }
 397
 398 void
 399 eat(void)
 400 {
 401         short ch;
 402         short moves;
 403         object *obj;
 404         char buf[70];
 405
 406         ch = pack_letter("eat what?", FOOD);
 407
 408         if (ch == CANCEL) {
 409                 return;
 410         }
 411         if (!(obj = get_letter_object(ch))) {
 412                 message("no such item.", 0);
 413                 return;
 414         }
 415         if (obj->what_is != FOOD) {
 416                 message("you can't eat that", 0);
 417                 return;
 418         }
 419         if ((obj->which_kind == FRUIT) || rand_percent(60)) {
 420                 moves = get_rand(950, 1150);
 421                 if (obj->which_kind == RATION) {
 422                         message("yum, that tasted good", 0);
 423                 } else {
 424                         sprintf(buf, "my, that was a yummy %s", fruit);
 425                         message(buf, 0);
 426                 }
 427         } else {
 428                 moves = get_rand(750, 950);
 429                 message("yuk, that food tasted awful", 0);
 430                 add_exp(2, 1);
 431         }
 432         rogue.moves_left /= 3;
 433         rogue.moves_left += moves;
 434         hunger_str[0] = 0;
 435         print_stats(STAT_HUNGER);
 436
 437         vanish(obj, 1, &rogue.pack);
 438 }
 439
 440 static void
 441 hold_monster(void)
 442 {
 443         short i, j;
 444         short mcount = 0;
 445         object *monster;
 446         short row, col;
 447
 448         for (i = -2; i <= 2; i++) {
 449                 for (j = -2; j <= 2; j++) {
 450                         row = rogue.row + i;
 451                         col = rogue.col + j;
 452                         if ((row < MIN_ROW) || (row > (DROWS-2)) || (col < 0) ||
 453                                  (col > (DCOLS-1))) {
 454                                 continue;
 455                         }
 456                         if (dungeon[row][col] & MONSTER) {
 457                                 monster = object_at(&level_monsters, row, col);
 458                                 monster->m_flags |= ASLEEP;
 459                                 monster->m_flags &= (~WAKENS);
 460                                 mcount++;
 461                         }
 462                 }
 463         }
 464         if (mcount == 0) {
 465                 message("you feel a strange sense of loss", 0);
 466         } else if (mcount == 1) {
 467                 message("the monster freezes", 0);
 468         } else {
 469                 message("the monsters around you freeze", 0);
 470         }
 471 }
 472
 473 void
 474 tele(void)
 475 {
 476         mvaddch(rogue.row, rogue.col, get_dungeon_char(rogue.row, rogue.col));
 477
 478         if (cur_room >= 0) {
 479                 darken_room(cur_room);
 480         }
 481         put_player(get_room_number(rogue.row, rogue.col));
 482         being_held = 0;
 483         bear_trap = 0;
 484 }
 485
 486 void
 487 hallucinate(void)
 488 {
 489         object *obj, *monster;
 490         short ch;
 491
 492         if (blind) return;
 493
 494         obj = level_objects.next_object;
 495
 496         while (obj) {
 497                 ch = mvinch(obj->row, obj->col);
 498                 if (((ch < 'A') || (ch > 'Z')) &&
 499                         ((obj->row != rogue.row) || (obj->col != rogue.col)))
 500                 if ((ch != ' ') && (ch != '.') && (ch != '#') && (ch != '+')) {
 501                         addch(gr_obj_char());
 502                 }
 503                 obj = obj->next_object;
 504         }
 505         monster = level_monsters.next_monster;
 506
 507         while (monster) {
 508                 ch = mvinch(monster->row, monster->col);
 509                 if ((ch >= 'A') && (ch <= 'Z')) {
 510                         addch(get_rand('A', 'Z'));
 511                 }
 512                 monster = monster->next_monster;
 513         }
 514 }
 515
 516 void
 517 unhallucinate(void)
 518 {
 519         halluc = 0;
 520         relight();
 521         message("everything looks SO boring now", 1);
 522 }
 523
 524 void
 525 unblind(void)
 526 {
 527         blind = 0;
 528         message("the veil of darkness lifts", 1);
 529         relight();
 530         if (halluc) {
 531                 hallucinate();
 532         }
 533         if (detect_monster) {
 534                 show_monsters();
 535         }
 536 }
 537
 538 void
 539 relight(void)
 540 {
 541         if (cur_room == PASSAGE) {
 542                 light_passage(rogue.row, rogue.col);
 543         } else {
 544                 light_up_room(cur_room);
 545         }
 546         mvaddch(rogue.row, rogue.col, rogue.fchar);
 547 }
 548
 549 void
 550 take_a_nap(void)
 551 {
 552         short i;
 553
 554         i = get_rand(2, 5);
 555         md_sleep(1);
 556
 557         while (i--) {
 558                 mv_mons();
 559         }
 560         md_sleep(1);
 561         message(you_can_move_again, 0);
 562 }
 563
 564 static void
 565 go_blind(void)
 566 {
 567         short i, j;
 568
 569         if (!blind) {
 570                 message("a cloak of darkness falls around you", 0);
 571         }
 572         blind += get_rand(500, 800);
 573
 574         if (detect_monster) {
 575                 object *monster;
 576
 577                 monster = level_monsters.next_monster;
 578
 579                 while (monster) {
 580                         mvaddch(monster->row, monster->col, monster->trail_char);
 581                         monster = monster->next_monster;
 582                 }
 583         }
 584         if (cur_room >= 0) {
 585                 for (i = rooms[cur_room].top_row + 1;
 586                          i < rooms[cur_room].bottom_row; i++) {
 587                         for (j = rooms[cur_room].left_col + 1;
 588                                  j < rooms[cur_room].right_col; j++) {
 589                                 mvaddch(i, j, ' ');
 590                         }
 591                 }
 592         }
 593         mvaddch(rogue.row, rogue.col, rogue.fchar);
 594 }
 595
 596 static const char *
 597 get_ench_color(void)
 598 {
 599         if (halluc) {
 600                 return(id_potions[get_rand(0, POTIONS-1)].title);
 601         } else if (con_mon) {
 602                 return("red ");
 603         }
 604         return("blue ");
 605 }
 606
 607 void
 608 cnfs(void)
 609 {
 610         confused += get_rand(12, 22);
 611 }
 612
 613 void
 614 unconfuse(void)
 615 {
 616         char msg[80];
 617
 618         confused = 0;
 619         sprintf(msg, "you feel less %s now", (halluc ? "trippy" : "confused"));
 620         message(msg, 1);
 621 }
 622
 623 static void
 624 uncurse_all(void)
 625 {
 626         object *obj;
 627
 628         obj = rogue.pack.next_object;
 629
 630         while (obj) {
 631                 obj->is_cursed = 0;
 632                 obj = obj->next_object;
 633         }
 634 }