Source:NetHack 3.4.0/steed.c
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Below is the full text to steed.c from the source code of NetHack 3.4.0. To link to a particular line, write [[NetHack 3.4.0/steed.c#line123]], for example.
Warning! This is the source code from an old release. For the latest release, see Source code
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1. /* SCCS Id: @(#)steed.c 3.4 2002/03/09 */ 2. /* Copyright (c) Kevin Hugo, 1998-1999. */ 3. /* NetHack may be freely redistributed. See license for details. */ 4. 5. #include "hack.h" 6. 7. 8. #ifdef STEED 9. 10. /* Monsters that might be ridden */ 11. static NEARDATA const char steeds[] = { 12. S_QUADRUPED, S_UNICORN, S_ANGEL, S_CENTAUR, S_DRAGON, S_JABBERWOCK, '\0' 13. }; 14. 15. STATIC_DCL boolean FDECL(landing_spot, (coord *, int)); 16. 17. /*** Putting the saddle on ***/ 18. 19. /* Can this monster wear a saddle? */ 20. boolean 21. can_saddle(mtmp) 22. struct monst *mtmp; 23. { 24. struct permonst *ptr = mtmp->data; 25. 26. return (index(steeds, ptr->mlet) && (ptr->msize >= MZ_MEDIUM) && 27. (!humanoid(ptr) || ptr->mlet == S_CENTAUR) && 28. !amorphous(ptr) && !noncorporeal(ptr) && 29. !is_whirly(ptr) && !unsolid(ptr)); 30. } 31. 32. 33. int 34. use_saddle(otmp) 35. struct obj *otmp; 36. { 37. struct monst *mtmp; 38. struct permonst *ptr; 39. int chance; 40. const char *s; 41. 42. 43. /* Can you use it? */ 44. if (nohands(youmonst.data)) { 45. You("have no hands!"); /* not `body_part(HAND)' */ 46. return 0; 47. } else if (!freehand()) { 48. You("have no free %s.", body_part(HAND)); 49. return 0; 50. } 51. 52. /* Select an animal */ 53. if (u.uswallow || Underwater || !getdir((char *)0)) { 54. pline(Never_mind); 55. return 0; 56. } 57. if (!u.dx && !u.dy) { 58. pline("Saddle yourself? Very funny..."); 59. return 0; 60. } 61. if (!isok(u.ux+u.dx, u.uy+u.dy) || 62. !(mtmp = m_at(u.ux+u.dx, u.uy+u.dy)) || 63. !canspotmon(mtmp)) { 64. pline("I see nobody there."); 65. return 1; 66. } 67. 68. /* Is this a valid monster? */ 69. if (mtmp->misc_worn_check & W_SADDLE || 70. which_armor(mtmp, W_SADDLE)) { 71. pline("%s doesn't need another one.", Monnam(mtmp)); 72. return 1; 73. } 74. ptr = mtmp->data; 75. if (touch_petrifies(ptr) && !Stone_resistance) { 76. char kbuf[BUFSZ]; 77. 78. You("touch %s.", mon_nam(mtmp)); 79. if (!(poly_when_stoned(youmonst.data) && polymon(PM_STONE_GOLEM))) { 80. Sprintf(kbuf, "attempting to saddle %s", a_monnam(mtmp)); 81. instapetrify(kbuf); 82. } 83. } 84. if (ptr == &mons[PM_INCUBUS] || ptr == &mons[PM_SUCCUBUS]) { 85. pline("Shame on you!"); 86. exercise(A_WIS, FALSE); 87. return 1; 88. } 89. if (mtmp->isminion || mtmp->isshk || mtmp->ispriest || 90. mtmp->isgd || mtmp->iswiz) { 91. pline("I think %s would mind.", mon_nam(mtmp)); 92. return 1; 93. } 94. if (!can_saddle(mtmp)) { 95. You_cant("saddle such a creature."); 96. return 1; 97. } 98. 99. /* Calculate your chance */ 100. chance = ACURR(A_DEX) + ACURR(A_CHA)/2 + 2*mtmp->mtame; 101. chance += u.ulevel * (mtmp->mtame ? 20 : 5); 102. if (!mtmp->mtame) chance -= 10*mtmp->m_lev; 103. if (Role_if(PM_KNIGHT)) 104. chance += 20; 105. switch (P_SKILL(P_RIDING)) { 106. case P_ISRESTRICTED: 107. case P_UNSKILLED: 108. default: 109. chance -= 20; break; 110. case P_BASIC: 111. break; 112. case P_SKILLED: 113. chance += 15; break; 114. case P_EXPERT: 115. chance += 30; break; 116. } 117. if (Confusion || Fumbling || Glib) 118. chance -= 20; 119. else if (uarmg && 120. (s = OBJ_DESCR(objects[uarmg->otyp])) != (char *)0 && 121. !strncmp(s, "riding ", 7)) 122. /* Bonus for wearing "riding" (but not fumbling) gloves */ 123. chance += 10; 124. else if (uarmf && 125. (s = OBJ_DESCR(objects[uarmf->otyp])) != (char *)0 && 126. !strncmp(s, "riding ", 7)) 127. /* ... or for "riding boots" */ 128. chance += 10; 129. if (otmp->cursed) 130. chance -= 50; 131. 132. /* Make the attempt */ 133. if (rn2(100) < chance) { 134. You("put the saddle on %s.", mon_nam(mtmp)); 135. freeinv(otmp); 136. /* mpickobj may free otmp it if merges, but we have already 137. checked for a saddle above, so no merger should happen */ 138. (void) mpickobj(mtmp, otmp); 139. mtmp->misc_worn_check |= W_SADDLE; 140. otmp->owornmask = W_SADDLE; 141. otmp->leashmon = mtmp->m_id; 142. update_mon_intrinsics(mtmp, otmp, TRUE); 143. } else 144. pline("%s resists!", Monnam(mtmp)); 145. return 1; 146. } 147. 148. 149. /*** Riding the monster ***/ 150. 151. /* Can we ride this monster? Caller should also check can_saddle() */ 152. boolean 153. can_ride(mtmp) 154. struct monst *mtmp; 155. { 156. return (mtmp->mtame && humanoid(youmonst.data) && 157. !verysmall(youmonst.data) && !bigmonst(youmonst.data) && 158. (!Underwater || is_swimmer(mtmp->data))); 159. } 160. 161. 162. int 163. doride() 164. { 165. boolean forcemount = FALSE; 166. 167. if (u.usteed) 168. dismount_steed(DISMOUNT_BYCHOICE); 169. else if (getdir((char *)0) && isok(u.ux+u.dx, u.uy+u.dy)) { 170. #ifdef WIZARD 171. if (wizard && yn("Force the mount to succeed?") == 'y') 172. forcemount = TRUE; 173. #endif 174. return (mount_steed(m_at(u.ux+u.dx, u.uy+u.dy), forcemount)); 175. } else 176. return 0; 177. return 1; 178. } 179. 180. 181. /* Start riding, with the given monster */ 182. boolean 183. mount_steed(mtmp, force) 184. struct monst *mtmp; /* The animal */ 185. boolean force; /* Quietly force this animal */ 186. { 187. struct obj *otmp; 188. char buf[BUFSZ]; 189. struct permonst *ptr; 190. 191. 192. /* Sanity checks */ 193. if (u.usteed) { 194. if (!force) 195. You("are already riding %s.", mon_nam(u.usteed)); 196. return (FALSE); 197. } 198. 199. /* Is the player in the right form? */ 200. if (Hallucination && !force) { 201. pline("Maybe you should find a designated driver."); 202. return (FALSE); 203. } 204. /* While riding Wounded_legs refers to the steed's, 205. * not the hero's legs. 206. * That opens up a potential abuse where the player 207. * can mount a steed, then dismount immediately to 208. * heal leg damage, because leg damage is always 209. * healed upon dismount (Wounded_legs context switch). 210. * By preventing a hero with Wounded_legs from 211. * mounting a steed, the potential for abuse is 212. * minimized, if not eliminated altogether. 213. */ 214. if (Wounded_legs) { 215. Your("%s are in no shape for riding.", makeplural(body_part(LEG))); 216. #ifdef WIZARD 217. if (force && wizard && yn("Heal your legs?") == 'y') 218. HWounded_legs = EWounded_legs = 0; 219. else 220. #endif 221. return (FALSE); 222. } 223. 224. if (Upolyd && (!humanoid(youmonst.data) || verysmall(youmonst.data) || 225. bigmonst(youmonst.data))) { 226. if (!force) 227. You("won't fit on a saddle."); 228. return (FALSE); 229. } 230. if(!force && (near_capacity() > SLT_ENCUMBER)) { 231. You_cant("do that while carrying so much stuff."); 232. return (FALSE); 233. } 234. 235. /* Can the player reach and see the monster? */ 236. if (u.uswallow || u.ustuck || u.utrap || Punished) { 237. if (!force) { 238. if (Punished) 239. You("are unable to swing your %s over.", 240. body_part(LEG)); 241. else 242. You("are stuck here for now."); 243. } 244. return (FALSE); 245. } 246. if (!mtmp || (!force && ((Blind && !Blind_telepat) || 247. mtmp->mundetected || 248. mtmp->m_ap_type == M_AP_FURNITURE || 249. mtmp->m_ap_type == M_AP_OBJECT))) { 250. if (!force) 251. pline("I see nobody there."); 252. return (FALSE); 253. } 254. 255. /* Is this a valid monster? */ 256. otmp = which_armor(mtmp, W_SADDLE); 257. if (!otmp) { 258. pline("%s is not saddled.", Monnam(mtmp)); 259. return (FALSE); 260. } 261. ptr = mtmp->data; 262. if (touch_petrifies(ptr) && !Stone_resistance) { 263. char kbuf[BUFSZ]; 264. 265. You("touch %s.", mon_nam(mtmp)); 266. Sprintf(kbuf, "attempting to ride %s", an(mtmp->data->mname)); 267. instapetrify(kbuf); 268. } 269. if (!mtmp->mtame || mtmp->isminion) { 270. if (!force) 271. pline("I think %s would mind.", mon_nam(mtmp)); 272. return (FALSE); 273. } 274. if (!force && !Role_if(PM_KNIGHT) && !(--mtmp->mtame)) { 275. /* no longer tame */ 276. newsym(mtmp->mx, mtmp->my); 277. pline("%s resists%s!", Monnam(mtmp), 278. mtmp->mleashed ? " and its leash comes off" : ""); 279. if (mtmp->mleashed) m_unleash(mtmp, FALSE); 280. return (FALSE); 281. } 282. if (!force && Underwater && !is_swimmer(ptr)) { 283. You_cant("ride that creature while under water."); 284. return (FALSE); 285. } 286. if (!can_saddle(mtmp) || !can_ride(mtmp)) { 287. if (!force) 288. You_cant("ride such a creature."); 289. return (0); 290. } 291. 292. /* Is the player impaired? */ 293. if (!force && !is_floater(ptr) && !is_flyer(ptr) && 294. Levitation && !Lev_at_will) { 295. You("cannot reach %s.", mon_nam(mtmp)); 296. return (FALSE); 297. } 298. if (!force && uarm && is_metallic(uarm) && 299. greatest_erosion(uarm)) { 300. Your("%s armor is too stiff to be able to mount %s.", 301. uarm->oeroded ? "rusty" : "corroded", 302. mon_nam(mtmp)); 303. return (FALSE); 304. } 305. if (!force && (Confusion || Fumbling || Glib || Wounded_legs || 306. otmp->cursed || (u.ulevel+mtmp->mtame < rnd(MAXULEV/2+5)))) { 307. if (Levitation) { 308. pline("%s slips away from you.", Monnam(mtmp)); 309. return FALSE; 310. } 311. You("slip while trying to get on %s.", mon_nam(mtmp)); 312. 313. /* Unfortunately we don't have a version of the monster-naming 314. * function that works well with "a" and "the" but ignores 315. * hallucination. Fortunately, we know the monster must be saddled 316. * at this point, and that it can't have type_is_pname(), so we 317. * don't need to worry about the special cases such a function 318. * would have to consider. 319. */ 320. Sprintf(buf, "slipped while mounting a saddled %s", 321. m_monnam(mtmp)); 322. losehp(rn1(5,10), buf, NO_KILLER_PREFIX); 323. return (FALSE); 324. } 325. 326. /* Success */ 327. if (!force) { 328. if (Levitation && !is_floater(ptr) && !is_flyer(ptr)) 329. /* Must have Lev_at_will at this point */ 330. pline("%s magically floats up!", Monnam(mtmp)); 331. You("mount %s.", mon_nam(mtmp)); 332. } 333. u.usteed = mtmp; 334. remove_monster(mtmp->mx, mtmp->my); 335. teleds(mtmp->mx, mtmp->my); 336. return (TRUE); 337. } 338. 339. 340. /* You and your steed have moved */ 341. void 342. exercise_steed() 343. { 344. if (!u.usteed) 345. return; 346. 347. /* It takes many turns of riding to exercise skill */ 348. if (u.urideturns++ >= 100) { 349. u.urideturns = 0; 350. use_skill(P_RIDING, 1); 351. } 352. return; 353. } 354. 355. 356. /* The player kicks or whips the steed */ 357. void 358. kick_steed() 359. { 360. char He[4]; 361. if (!u.usteed) 362. return; 363. 364. /* [ALI] Various effects of kicking sleeping/paralyzed steeds */ 365. if (u.usteed->msleeping || !u.usteed->mcanmove) { 366. /* We assume a message has just been output of the form 367. * "You kick <steed>." 368. */ 369. Strcpy(He, mhe(u.usteed)); 370. *He = highc(*He); 371. if ((u.usteed->mcanmove || u.usteed->mfrozen) && !rn2(2)) { 372. if (u.usteed->mcanmove) 373. u.usteed->msleeping = 0; 374. else if (u.usteed->mfrozen > 2) 375. u.usteed->mfrozen -= 2; 376. else { 377. u.usteed->mfrozen = 0; 378. u.usteed->mcanmove = 1; 379. } 380. if (u.usteed->msleeping || !u.usteed->mcanmove) 381. pline("%s stirs.", He); 382. else 383. pline("%s rouses %sself!", He, mhim(u.usteed)); 384. } else 385. pline("%s does not respond.", He); 386. return; 387. } 388. 389. /* Make the steed less tame and check if it resists */ 390. if (u.usteed->mtame) u.usteed->mtame--; 391. if (!u.usteed->mtame && u.usteed->mleashed) m_unleash(u.usteed, TRUE); 392. if (!u.usteed->mtame || (u.ulevel+u.usteed->mtame < rnd(MAXULEV/2+5))) { 393. newsym(u.usteed->mx, u.usteed->my); 394. dismount_steed(DISMOUNT_THROWN); 395. return; 396. } 397. 398. pline("%s gallops!", Monnam(u.usteed)); 399. u.ugallop += rn1(20, 30); 400. return; 401. } 402. 403. /* 404. * Try to find a dismount point adjacent to the steed's location. 405. * If all else fails, try enexto(). Use enexto() as a last resort because 406. * enexto() chooses its point randomly, possibly even outside the 407. * room's walls, which is not what we want. 408. * Adapted from mail daemon code. 409. */ 410. STATIC_OVL boolean 411. landing_spot(spot, forceit) 412. coord *spot; /* landing position (we fill it in) */ 413. int forceit; 414. { 415. int x, y, distance, min_distance = -1; 416. boolean found = FALSE; 417. 418. for (x = u.ux-1; x <= u.ux+1; x++) 419. for (y = u.uy-1; y <= u.uy+1; y++) { 420. if (!isok(x, y) || (x == u.ux && y == u.uy)) continue; 421. 422. if (ACCESSIBLE(levl[x][y].typ) && 423. !MON_AT(x,y) && !closed_door(x,y)) { 424. distance = distu(x,y); 425. if (min_distance < 0 || distance < min_distance || 426. (distance == min_distance && rn2(2))) { 427. spot->x = x; 428. spot->y = y; 429. min_distance = distance; 430. found = TRUE; 431. } 432. } 433. } 434. 435. /* If we didn't find a good spot and forceit is on, try enexto(). */ 436. if (forceit && min_distance < 0 && 437. !enexto(spot, u.ux, u.uy, youmonst.data)) 438. return FALSE; 439. 440. return found; 441. } 442. 443. /* Stop riding the current steed */ 444. void 445. dismount_steed(reason) 446. int reason; /* Player was thrown off etc. */ 447. { 448. struct monst *mtmp; 449. struct obj *otmp; 450. coord cc; 451. const char *verb = "fall"; 452. boolean repair_leg_damage = TRUE; 453. unsigned save_utrap = u.utrap; 454. boolean have_spot = landing_spot(&cc,0); 455. 456. mtmp = u.usteed; /* make a copy of steed pointer */ 457. /* Sanity check */ 458. if (!mtmp) /* Just return silently */ 459. return; 460. 461. /* Check the reason for dismounting */ 462. otmp = which_armor(mtmp, W_SADDLE); 463. switch (reason) { 464. case DISMOUNT_THROWN: 465. verb = "are thrown"; 466. case DISMOUNT_FELL: 467. You("%s off of %s!", verb, mon_nam(mtmp)); 468. if (!have_spot) have_spot = landing_spot(&cc,1); 469. losehp(rn1(10,10), "riding accident", KILLED_BY_AN); 470. set_wounded_legs(BOTH_SIDES, (int)HWounded_legs + rn1(5,5)); 471. repair_leg_damage = FALSE; 472. break; 473. case DISMOUNT_POLY: 474. You("can no longer ride %s.", mon_nam(u.usteed)); 475. if (!have_spot) have_spot = landing_spot(&cc,1); 476. break; 477. case DISMOUNT_ENGULFED: 478. /* caller displays message */ 479. break; 480. case DISMOUNT_BONES: 481. /* hero has just died... */ 482. break; 483. case DISMOUNT_GENERIC: 484. /* no messages, just make it so */ 485. break; 486. case DISMOUNT_BYCHOICE: 487. default: 488. if (otmp && otmp->cursed) { 489. You("can't. The saddle seems to be cursed."); 490. otmp->bknown = TRUE; 491. return; 492. } 493. if (!have_spot) { 494. You("can't. There isn't anywhere for you to stand."); 495. return; 496. } 497. if (!mtmp->mnamelth) { 498. pline("You've been through the dungeon on %s with no name.", 499. an(mtmp->data->mname)); 500. if (Hallucination) 501. pline("It felt good to get out of the rain."); 502. } else 503. You("dismount %s.", mon_nam(mtmp)); 504. } 505. /* While riding these refer to the steed's legs 506. * so after dismounting they refer to the player's 507. * legs once again. 508. */ 509. if (repair_leg_damage) HWounded_legs = EWounded_legs = 0; 510. 511. /* Release the steed and saddle */ 512. u.usteed = 0; 513. u.ugallop = 0L; 514. 515. /* Set player and steed's position. Try moving the player first 516. unless we're in the midst of creating a bones file. */ 517. if (reason == DISMOUNT_BONES) { 518. /* move the steed to an adjacent square */ 519. if (enexto(&cc, u.ux, u.uy, mtmp->data)) 520. rloc_to(mtmp, cc.x, cc.y); 521. else /* evidently no room nearby; move steed elsewhere */ 522. rloc(mtmp); 523. return; 524. } 525. if (!DEADMONSTER(mtmp)) { 526. place_monster(mtmp, u.ux, u.uy); 527. if (!u.uswallow && !u.ustuck && have_spot) { 528. struct permonst *mdat = mtmp->data; 529. 530. /* The steed may drop into water/lava */ 531. if (!is_flyer(mdat) && !is_floater(mdat) && !is_clinger(mdat)) { 532. if (is_pool(u.ux, u.uy)) { 533. if (!Underwater) 534. pline("%s falls into the %s!", Monnam(mtmp), 535. surface(u.ux, u.uy)); 536. if (!is_swimmer(mdat) && !amphibious(mdat)) { 537. killed(mtmp); 538. adjalign(-1); 539. } 540. } else if (is_lava(u.ux, u.uy)) { 541. pline("%s is pulled into the lava!", Monnam(mtmp)); 542. if (!likes_lava(mdat)) { 543. killed(mtmp); 544. adjalign(-1); 545. } 546. } 547. } 548. /* Steed dismounting consists of two steps: being moved to another 549. * square, and descending to the floor. We have functions to do 550. * each of these activities, but they're normally called 551. * individually and include an attempt to look at or pick up the 552. * objects on the floor: 553. * teleds() --> spoteffects() --> pickup() 554. * float_down() --> pickup() 555. * We use this kludge to make sure there is only one such attempt. 556. * 557. * Clearly this is not the best way to do it. A full fix would 558. * involve having these functions not call pickup() at all, instead 559. * calling them first and calling pickup() afterwards. But it 560. * would take a lot of work to keep this change from having any 561. * unforseen side effects (for instance, you would no longer be 562. * able to walk onto a square with a hole, and autopickup before 563. * falling into the hole). 564. */ 565. /* [ALI] No need to move the player if the steed died. */ 566. if (!DEADMONSTER(mtmp)) { 567. /* Keep steed here, move the player to cc; 568. * teleds() clears u.utrap 569. */ 570. in_steed_dismounting = TRUE; 571. teleds(cc.x, cc.y); 572. in_steed_dismounting = FALSE; 573. 574. /* Put your steed in your trap */ 575. if (save_utrap) 576. (void) mintrap(mtmp); 577. } 578. /* Couldn't... try placing the steed */ 579. } else if (enexto(&cc, u.ux, u.uy, mtmp->data)) { 580. /* Keep player here, move the steed to cc */ 581. rloc_to(mtmp, cc.x, cc.y); 582. /* Player stays put */ 583. /* Otherwise, kill the steed */ 584. } else { 585. killed(mtmp); 586. adjalign(-1); 587. } 588. } 589. 590. /* Return the player to the floor */ 591. in_steed_dismounting = TRUE; 592. (void) float_down(0L, W_SADDLE); 593. in_steed_dismounting = FALSE; 594. flags.botl = 1; 595. if (reason != DISMOUNT_ENGULFED) { 596. (void)encumber_msg(); 597. vision_full_recalc = 1; 598. } 599. return; 600. } 601. 602. void 603. place_monster(mon, x, y) 604. struct monst *mon; 605. int x, y; 606. { 607. if (mon == u.usteed || 608. /* special case is for convoluted vault guard handling */ 609. (DEADMONSTER(mon) && !(mon->isgd && x == 0 && y == 0))) { 610. impossible("placing %s onto map?", 611. (mon == u.usteed) ? "steed" : "defunct monster"); 612. return; 613. } 614. mon->mx = x, mon->my = y; 615. level.monsters[x][y] = mon; 616. } 617. 618. #endif /* STEED */ 619. 620. /*steed.c*/
