games/hack/hack.worm.c

   1 /*      $NetBSD: hack.worm.c,v 1.9 2011/08/06 20:29:37 dholland Exp $   */
   2
   3 /*
   4  * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
   5  * Amsterdam
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are
  10  * met:
  11  *
  12  * - Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * - 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  *
  19  * - Neither the name of the Stichting Centrum voor Wiskunde en
  20  * Informatica, nor the names of its contributors may be used to endorse or
  21  * promote products derived from this software without specific prior
  22  * written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  25  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  26  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  27  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  28  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  30  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  31  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  33  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  34  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 /*
  38  * Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
  39  * All rights reserved.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. The name of the author may not be used to endorse or promote products
  50  *    derived from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  53  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  54  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
  55  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  56  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  57  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  58  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  59  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  60  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  61  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  */
  63
  64 #include <stdlib.h>
  65 #include "hack.h"
  66 #include "extern.h"
  67 #ifndef NOWORM
  68 #include "def.wseg.h"
  69
  70 struct wseg    *wsegs[32];      /* linked list, tail first */
  71 struct wseg    *wheads[32];
  72 long            wgrowtime[32];
  73
  74 static void remseg(struct wseg *);
  75
  76 int
  77 getwn(struct monst *mtmp)
  78 {
  79         int     tmp;
  80         for (tmp = 1; tmp < 32; tmp++)
  81                 if (!wsegs[tmp]) {
  82                         mtmp->wormno = tmp;
  83                         return (1);
  84                 }
  85         return (0);             /* level infested with worms */
  86 }
  87
  88 /* called to initialize a worm unless cut in half */
  89 void
  90 initworm(struct monst *mtmp)
  91 {
  92         struct wseg    *wtmp;
  93         int     tmp = mtmp->wormno;
  94         if (!tmp)
  95                 return;
  96         wheads[tmp] = wsegs[tmp] = wtmp = newseg();
  97         wgrowtime[tmp] = 0;
  98         wtmp->wx = mtmp->mx;
  99         wtmp->wy = mtmp->my;
 100         /* wtmp->wdispl = 0; */
 101         wtmp->nseg = 0;
 102 }
 103
 104 void
 105 worm_move(struct monst *mtmp)
 106 {
 107         struct wseg    *wtmp, *whd = NULL;
 108         int             tmp = mtmp->wormno;
 109         wtmp = newseg();
 110         wtmp->wx = mtmp->mx;
 111         wtmp->wy = mtmp->my;
 112         wtmp->nseg = 0;
 113         /* wtmp->wdispl = 0; */
 114         (whd = wheads[tmp])->nseg = wtmp;
 115         wheads[tmp] = wtmp;
 116         if (cansee(whd->wx, whd->wy)) {
 117                 unpmon(mtmp);
 118                 atl(whd->wx, whd->wy, '~');
 119                 whd->wdispl = 1;
 120         } else
 121                 whd->wdispl = 0;
 122         if (wgrowtime[tmp] <= moves) {
 123                 if (!wgrowtime[tmp])
 124                         wgrowtime[tmp] = moves + rnd(5);
 125                 else
 126                         wgrowtime[tmp] += 2 + rnd(15);
 127                 mtmp->mhpmax += 3;
 128                 mtmp->mhp += 3;
 129                 return;
 130         }
 131         whd = wsegs[tmp];
 132         wsegs[tmp] = whd->nseg;
 133         remseg(whd);
 134 }
 135
 136 void
 137 worm_nomove(struct monst *mtmp)
 138 {
 139         int             tmp;
 140         struct wseg    *wtmp;
 141         tmp = mtmp->wormno;
 142         wtmp = wsegs[tmp];
 143         if (wtmp == wheads[tmp])
 144                 return;
 145         if (wtmp == 0 || wtmp->nseg == 0)
 146                 panic("worm_nomove?");
 147         wsegs[tmp] = wtmp->nseg;
 148         remseg(wtmp);
 149         mtmp->mhp -= 3;         /* mhpmax not changed ! */
 150 }
 151
 152 void
 153 wormdead(struct monst *mtmp)
 154 {
 155         int             tmp = mtmp->wormno;
 156         struct wseg    *wtmp, *wtmp2;
 157         if (!tmp)
 158                 return;
 159         mtmp->wormno = 0;
 160         for (wtmp = wsegs[tmp]; wtmp; wtmp = wtmp2) {
 161                 wtmp2 = wtmp->nseg;
 162                 remseg(wtmp);
 163         }
 164         wsegs[tmp] = 0;
 165 }
 166
 167 void
 168 wormhit(struct monst *mtmp)
 169 {
 170         int             tmp = mtmp->wormno;
 171         struct wseg    *wtmp;
 172         if (!tmp)
 173                 return;         /* worm without tail */
 174         for (wtmp = wsegs[tmp]; wtmp; wtmp = wtmp->nseg)
 175                 (void) hitu(mtmp, 1);
 176 }
 177
 178 void
 179 wormsee(unsigned tmp)
 180 {
 181         struct wseg    *wtmp = wsegs[tmp];
 182         if (!wtmp)
 183                 panic("wormsee: wtmp==0");
 184         for (; wtmp->nseg; wtmp = wtmp->nseg)
 185                 if (!cansee(wtmp->wx, wtmp->wy) && wtmp->wdispl) {
 186                         newsym(wtmp->wx, wtmp->wy);
 187                         wtmp->wdispl = 0;
 188                 }
 189 }
 190
 191 void
 192 pwseg(struct wseg *wtmp)
 193 {
 194         if (!wtmp->wdispl) {
 195                 atl(wtmp->wx, wtmp->wy, '~');
 196                 wtmp->wdispl = 1;
 197         }
 198 }
 199
 200 /* weptyp is uwep->otyp or 0 */
 201 void
 202 cutworm(struct monst *mtmp, xchar x, xchar y, uchar weptyp)
 203 {
 204         struct wseg    *wtmp, *wtmp2;
 205         struct monst   *mtmp2;
 206         int             tmp, tmp2;
 207         if (mtmp->mx == x && mtmp->my == y)
 208                 return;         /* hit headon */
 209
 210         /* cutting goes best with axe or sword */
 211         tmp = rnd(20);
 212         if (weptyp == LONG_SWORD || weptyp == TWO_HANDED_SWORD ||
 213             weptyp == AXE)
 214                 tmp += 5;
 215         if (tmp < 12)
 216                 return;
 217
 218         /* if tail then worm just loses a tail segment */
 219         tmp = mtmp->wormno;
 220         wtmp = wsegs[tmp];
 221         if (wtmp->wx == x && wtmp->wy == y) {
 222                 wsegs[tmp] = wtmp->nseg;
 223                 remseg(wtmp);
 224                 return;
 225         }
 226         /* cut the worm in two halves */
 227         mtmp2 = newmonst(0);
 228         *mtmp2 = *mtmp;
 229         mtmp2->mxlth = mtmp2->mnamelth = 0;
 230
 231         /* sometimes the tail end dies */
 232         if (rn2(3) || !getwn(mtmp2)) {
 233                 monfree(mtmp2);
 234                 tmp2 = 0;
 235         } else {
 236                 tmp2 = mtmp2->wormno;
 237                 wsegs[tmp2] = wsegs[tmp];
 238                 wgrowtime[tmp2] = 0;
 239         }
 240         do {
 241                 if (wtmp->nseg->wx == x && wtmp->nseg->wy == y) {
 242                         if (tmp2)
 243                                 wheads[tmp2] = wtmp;
 244                         wsegs[tmp] = wtmp->nseg->nseg;
 245                         remseg(wtmp->nseg);
 246                         wtmp->nseg = 0;
 247                         if (tmp2) {
 248                                 pline("You cut the worm in half.");
 249                                 mtmp2->mhpmax = mtmp2->mhp =
 250                                         d(mtmp2->data->mlevel, 8);
 251                                 mtmp2->mx = wtmp->wx;
 252                                 mtmp2->my = wtmp->wy;
 253                                 mtmp2->nmon = fmon;
 254                                 fmon = mtmp2;
 255                                 pmon(mtmp2);
 256                         } else {
 257                                 pline("You cut off part of the worm's tail.");
 258                                 remseg(wtmp);
 259                                 monfree(mtmp2);
 260                         }
 261                         mtmp->mhp /= 2;
 262                         return;
 263                 }
 264                 wtmp2 = wtmp->nseg;
 265                 if (!tmp2)
 266                         remseg(wtmp);
 267                 wtmp = wtmp2;
 268         } while (wtmp->nseg);
 269         panic("Cannot find worm segment");
 270 }
 271
 272 static void
 273 remseg(struct wseg *wtmp)
 274 {
 275         if (wtmp->wdispl)
 276                 newsym(wtmp->wx, wtmp->wy);
 277         free(wtmp);
 278 }
 279 #endif  /* NOWORM */