games/hack/hack.engrave.c

   1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   2 /* hack.engrave.c - version 1.0.3 */
   3 /* $FreeBSD: src/games/hack/hack.engrave.c,v 1.4 1999/11/16 02:57:04 billf Exp $ */
   4
   5 #include "hack.h"
   6
   7 extern char nul[];
   8 extern struct obj zeroobj;
   9 struct engr {
  10         struct engr *nxt_engr;
  11         char *engr_txt;
  12         xchar engr_x, engr_y;
  13         unsigned engr_lth;      /* for save & restore; not length of text */
  14         long engr_time; /* moment engraving was (will be) finished */
  15         xchar engr_type;
  16 #define DUST    1
  17 #define ENGRAVE 2
  18 #define BURN    3
  19 } *head_engr;
  20
  21 static struct engr *engr_at(xchar, xchar);
  22 static void del_engr(struct engr *);
  23
  24 static struct engr *
  25 engr_at(xchar x, xchar y)
  26 {
  27         struct engr *ep = head_engr;
  28
  29         while (ep) {
  30                 if (x == ep->engr_x && y == ep->engr_y)
  31                         return(ep);
  32                 ep = ep->nxt_engr;
  33         }
  34         return (NULL);
  35 }
  36
  37 bool
  38 sengr_at(const char *s, xchar x, xchar y)
  39 {
  40         struct engr *ep = engr_at(x, y);
  41         char *t;
  42         int n;
  43
  44         if (ep && ep->engr_time <= moves) {
  45                 t = ep->engr_txt;
  46                 n = strlen(s);
  47                 while (*t) {
  48                         if (!strncmp(s, t, n))
  49                                 return (1);
  50                         t++;
  51                 }
  52         }
  53         return (0);
  54 }
  55
  56 void
  57 u_wipe_engr(int cnt)
  58 {
  59         if (!u.uswallow && !Levitation)
  60                 wipe_engr_at(u.ux, u.uy, cnt);
  61 }
  62
  63 void
  64 wipe_engr_at(xchar x, xchar y, xchar cnt)
  65 {
  66         struct engr *ep = engr_at(x, y);
  67         int lth, pos;
  68         char ch;
  69
  70         if (ep) {
  71                 if ((ep->engr_type != DUST) || Levitation)
  72                         cnt = rn2(1 + 50 / (cnt + 1)) ? 0 : 1;
  73                 lth = strlen(ep->engr_txt);
  74                 if (lth && cnt > 0) {
  75                         while (cnt--) {
  76                                 pos = rn2(lth);
  77                                 if ((ch = ep->engr_txt[pos]) == ' ')
  78                                         continue;
  79                                 ep->engr_txt[pos] = (ch != '?') ? '?' : ' ';
  80                         }
  81                 }
  82                 while (lth && ep->engr_txt[lth - 1] == ' ')
  83                         ep->engr_txt[--lth] = 0;
  84                 while (ep->engr_txt[0] == ' ')
  85                         ep->engr_txt++;
  86                 if (!ep->engr_txt[0])
  87                         del_engr(ep);
  88         }
  89 }
  90
  91 void
  92 read_engr_at(int x, int y)
  93 {
  94         struct engr *ep = engr_at(x, y);
  95
  96         if (ep && ep->engr_txt[0]) {
  97                 switch (ep->engr_type) {
  98                 case DUST:
  99                         pline("Something is written here in the dust.");
 100                         break;
 101                 case ENGRAVE:
 102                         pline("Something is engraved here on the floor.");
 103                         break;
 104                 case BURN:
 105                         pline("Some text has been burned here in the floor.");
 106                         break;
 107                 default:
 108                         impossible("Something is written in a very strange way.");
 109                 }
 110                 pline("You read: \"%s\".", ep->engr_txt);
 111         }
 112 }
 113
 114 void
 115 make_engr_at(int x, int y, const char *s)
 116 {
 117         struct engr *ep;
 118
 119         if ((ep = engr_at(x, y)))
 120                 del_engr(ep);
 121         ep = alloc((unsigned)(sizeof(struct engr) + strlen(s) + 1));
 122         ep->nxt_engr = head_engr;
 123         head_engr = ep;
 124         ep->engr_x = x;
 125         ep->engr_y = y;
 126         ep->engr_txt = (char *)(ep + 1);
 127         strcpy(ep->engr_txt, s);
 128         ep->engr_time = 0;
 129         ep->engr_type = DUST;
 130         ep->engr_lth = strlen(s) + 1;
 131 }
 132
 133 int
 134 doengrave(void)
 135 {
 136         int len;
 137         char *sp;
 138         struct engr *ep, *oep = engr_at(u.ux, u.uy);
 139         char buf[BUFSZ];
 140         xchar type;
 141         int spct;       /* number of leading spaces */
 142         struct obj *otmp;
 143
 144         multi = 0;
 145         if (u.uswallow) {
 146                 pline("You're joking. Hahaha!");        /* riv05!a3 */
 147                 return (0);
 148         }
 149
 150         /* one may write with finger, weapon or wand */
 151         otmp = getobj("#-)/", "write with");
 152         if (!otmp)
 153                 return (0);
 154
 155         if (otmp == &zeroobj)
 156                 otmp = NULL;
 157         if (otmp && otmp->otyp == WAN_FIRE && otmp->spe) {
 158                 type = BURN;
 159                 otmp->spe--;
 160         } else {
 161                 /* first wield otmp */
 162                 if (otmp != uwep) {
 163                         if (uwep && uwep->cursed) {
 164                                 /* Andreas Bormann */
 165                                 pline("Since your weapon is welded to your hand,");
 166                                 pline("you use the %s.", aobjnam(uwep, NULL));
 167                                 otmp = uwep;
 168                         } else {
 169                                 if (!otmp)
 170                                         pline("You are now empty-handed.");
 171                                 else if (otmp->cursed)
 172                                         pline("The %s %s to your hand!",
 173                                             aobjnam(otmp, "weld"),
 174                                             (otmp->quan == 1) ? "itself" : "themselves");
 175                                 else
 176                                         pline("You now wield %s.", doname(otmp));
 177                                 setuwep(otmp);
 178                         }
 179                 }
 180
 181                 if (!otmp)
 182                         type = DUST;
 183                 else if (otmp->otyp == DAGGER || otmp->otyp == TWO_HANDED_SWORD ||
 184                     otmp->otyp == CRYSKNIFE ||
 185                     otmp->otyp == LONG_SWORD || otmp->otyp == AXE) {
 186                         type = ENGRAVE;
 187                         if ((int)otmp->spe <= -3) {
 188                                 type = DUST;
 189                                 pline("Your %s too dull for engraving.",
 190                                       aobjnam(otmp, "are"));
 191                                 if (oep && oep->engr_type != DUST)
 192                                         return (1);
 193                         }
 194                 } else
 195                         type = DUST;
 196         }
 197         if (Levitation && type != BURN) {       /* riv05!a3 */
 198                 pline("You can't reach the floor!");
 199                 return (1);
 200         }
 201         if (oep && oep->engr_type == DUST) {
 202                 pline("You wipe out the message that was written here.");
 203                 del_engr(oep);
 204                 oep = NULL;
 205         }
 206         if (type == DUST && oep) {
 207                 pline("You cannot wipe out the message that is %s in the rock.",
 208                       (oep->engr_type == BURN) ? "burned" : "engraved");
 209                 return (1);
 210         }
 211
 212         pline("What do you want to %s on the floor here? ",
 213               (type == ENGRAVE) ? "engrave" : (type == BURN) ? "burn" : "write");
 214         getlin(buf);
 215         clrlin();
 216         spct = 0;
 217         sp = buf;
 218         while (*sp == ' ') {
 219                 spct++;
 220                 sp++;
 221         }
 222         len = strlen(sp);
 223         if (!len || *buf == '\033') {
 224                 if (type == BURN)
 225                         otmp->spe++;
 226                 return (0);
 227         }
 228
 229         switch (type) {
 230         case DUST:
 231         case BURN:
 232                 if (len > 15) {
 233                         multi = -(len / 10);
 234                         nomovemsg = "You finished writing.";
 235                 }
 236                 break;
 237         case ENGRAVE:           /* here otmp != 0 */
 238                 {
 239                         int len2 = (otmp->spe + 3) * 2 + 1;
 240
 241                         pline("Your %s dull.", aobjnam(otmp, "get"));
 242                         if (len2 < len) {
 243                                 len = len2;
 244                                 sp[len] = 0;
 245                                 otmp->spe = -3;
 246                                 nomovemsg = "You cannot engrave more.";
 247                         } else {
 248                                 otmp->spe -= len / 2;
 249                                 nomovemsg = "You finished engraving.";
 250                         }
 251                         multi = -len;
 252                 }
 253                 break;
 254         }
 255         if (oep)
 256                 len += strlen(oep->engr_txt) + spct;
 257         ep = alloc((unsigned)(sizeof(struct engr) + len + 1));
 258         ep->nxt_engr = head_engr;
 259         head_engr = ep;
 260         ep->engr_x = u.ux;
 261         ep->engr_y = u.uy;
 262         sp = (char *)(ep + 1);  /* (char *)ep + sizeof(struct engr) */
 263         ep->engr_txt = sp;
 264         if (oep) {
 265                 strcpy(sp, oep->engr_txt);
 266                 strcat(sp, buf);
 267                 del_engr(oep);
 268         } else
 269                 strcpy(sp, buf);
 270         ep->engr_lth = len + 1;
 271         ep->engr_type = type;
 272         ep->engr_time = moves - multi;
 273
 274         /* kludge to protect pline against excessively long texts */
 275         if (len > BUFSZ - 20)
 276                 sp[BUFSZ - 20] = 0;
 277
 278         return (1);
 279 }
 280
 281 void
 282 save_engravings(int fd)
 283 {
 284         struct engr *ep = head_engr;
 285
 286         while (ep) {
 287                 if (!ep->engr_lth || !ep->engr_txt[0]) {
 288                         ep = ep->nxt_engr;
 289                         continue;
 290                 }
 291                 bwrite(fd, (char *)&(ep->engr_lth), sizeof(ep->engr_lth));
 292                 bwrite(fd, (char *)ep, sizeof(struct engr) + ep->engr_lth);
 293                 ep = ep->nxt_engr;
 294         }
 295         bwrite(fd, (char *)nul, sizeof(unsigned));
 296         head_engr = NULL;
 297 }
 298
 299 void
 300 rest_engravings(int fd)
 301 {
 302         struct engr *ep;
 303         unsigned lth;
 304
 305         head_engr = NULL;
 306         for (;;) {
 307                 mread(fd, (char *)&lth, sizeof(unsigned));
 308                 if (lth == 0)
 309                         return;
 310                 ep = alloc(sizeof(struct engr) + lth);
 311                 mread(fd, (char *)ep, sizeof(struct engr) + lth);
 312                 ep->nxt_engr = head_engr;
 313                 ep->engr_txt = (char *)(ep + 1);        /* Andreas Bormann */
 314                 head_engr = ep;
 315         }
 316 }
 317
 318 static void
 319 del_engr(struct engr *ep)
 320 {
 321         struct engr *ept;
 322
 323         if (ep == head_engr)
 324                 head_engr = ep->nxt_engr;
 325         else {
 326                 for (ept = head_engr; ept; ept = ept->nxt_engr) {
 327                         if (ept->nxt_engr == ep) {
 328                                 ept->nxt_engr = ep->nxt_engr;
 329                                 goto fnd;
 330                         }
 331                 }
 332                 impossible("Error in del_engr?");
 333                 return;
 334         }
 335 fnd:
 336         free(ep);
 337 }