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 /* $DragonFly: src/games/hack/hack.engrave.c,v 1.4 2006/08/21 19:45:32 pavalos Exp $ */
   5
   6 #include        "hack.h"
   7
   8 extern char nul[];
   9 extern struct obj zeroobj;
  10 struct engr {
  11         struct engr *nxt_engr;
  12         char *engr_txt;
  13         xchar engr_x, engr_y;
  14         unsigned engr_lth;      /* for save & restore; not length of text */
  15         long engr_time; /* moment engraving was (will be) finished */
  16         xchar engr_type;
  17 #define DUST    1
  18 #define ENGRAVE 2
  19 #define BURN    3
  20 } *head_engr;
  21
  22 static struct engr      *engr_at(xchar, xchar);
  23 static void              del_engr(struct engr *);
  24
  25 static struct engr *
  26 engr_at(xchar x, xchar y)
  27 {
  28 struct engr *ep = head_engr;
  29         while(ep) {
  30                 if(x == ep->engr_x && y == ep->engr_y)
  31                         return(ep);
  32                 ep = ep->nxt_engr;
  33         }
  34         return((struct engr *) 0);
  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         if(ep && ep->engr_time <= moves) {
  44                 t = ep->engr_txt;
  45                 n = strlen(s);
  46                 while(*t) {
  47                         if(!strncmp(s,t,n)) return(1);
  48                         t++;
  49                 }
  50         }
  51         return(0);
  52 }
  53
  54 void
  55 u_wipe_engr(int cnt)
  56 {
  57         if(!u.uswallow && !Levitation)
  58                 wipe_engr_at(u.ux, u.uy, cnt);
  59 }
  60
  61 void
  62 wipe_engr_at(xchar x, xchar y, xchar cnt)
  63 {
  64 struct engr *ep = engr_at(x,y);
  65 int lth,pos;
  66 char ch;
  67         if(ep){
  68                 if((ep->engr_type != DUST) || Levitation) {
  69                         cnt = rn2(1 + 50/(cnt+1)) ? 0 : 1;
  70                 }
  71                 lth = strlen(ep->engr_txt);
  72                 if(lth && cnt > 0 ) {
  73                         while(cnt--) {
  74                                 pos = rn2(lth);
  75                                 if((ch = ep->engr_txt[pos]) == ' ')
  76                                         continue;
  77                                 ep->engr_txt[pos] = (ch != '?') ? '?' : ' ';
  78                         }
  79                 }
  80                 while(lth && ep->engr_txt[lth-1] == ' ')
  81                         ep->engr_txt[--lth] = 0;
  82                 while(ep->engr_txt[0] == ' ')
  83                         ep->engr_txt++;
  84                 if(!ep->engr_txt[0]) del_engr(ep);
  85         }
  86 }
  87
  88 void
  89 read_engr_at(int x, int y)
  90 {
  91 struct engr *ep = engr_at(x,y);
  92         if(ep && ep->engr_txt[0]) {
  93             switch(ep->engr_type) {
  94             case DUST:
  95                 pline("Something is written here in the dust.");
  96                 break;
  97             case ENGRAVE:
  98                 pline("Something is engraved here on the floor.");
  99                 break;
 100             case BURN:
 101                 pline("Some text has been burned here in the floor.");
 102                 break;
 103             default:
 104                 impossible("Something is written in a very strange way.");
 105             }
 106             pline("You read: \"%s\".", ep->engr_txt);
 107         }
 108 }
 109
 110 void
 111 make_engr_at(int x, int y, const char *s)
 112 {
 113         struct engr *ep;
 114
 115         if((ep = engr_at(x,y)))
 116             del_engr(ep);
 117         ep = (struct engr *)
 118             alloc((unsigned)(sizeof(struct engr) + strlen(s) + 1));
 119         ep->nxt_engr = head_engr;
 120         head_engr = ep;
 121         ep->engr_x = x;
 122         ep->engr_y = y;
 123         ep->engr_txt = (char *)(ep + 1);
 124         strcpy(ep->engr_txt, s);
 125         ep->engr_time = 0;
 126         ep->engr_type = DUST;
 127         ep->engr_lth = strlen(s) + 1;
 128 }
 129
 130 int
 131 doengrave(void)
 132 {
 133 int len;
 134 char *sp;
 135 struct engr *ep, *oep = engr_at(u.ux,u.uy);
 136 char buf[BUFSZ];
 137 xchar type;
 138 int spct;               /* number of leading spaces */
 139 struct obj *otmp;
 140         multi = 0;
 141
 142         if(u.uswallow) {
 143                 pline("You're joking. Hahaha!");        /* riv05!a3 */
 144                 return(0);
 145         }
 146
 147         /* one may write with finger, weapon or wand */
 148         otmp = getobj("#-)/", "write with");
 149         if(!otmp) return(0);
 150
 151         if(otmp == &zeroobj)
 152                 otmp = 0;
 153         if(otmp && otmp->otyp == WAN_FIRE && otmp->spe) {
 154                 type = BURN;
 155                 otmp->spe--;
 156         } else {
 157                 /* first wield otmp */
 158                 if(otmp != uwep) {
 159                         if(uwep && uwep->cursed) {
 160                             /* Andreas Bormann */
 161                             pline("Since your weapon is welded to your hand,");
 162                             pline("you use the %s.", aobjnam(uwep, (char *) 0));
 163                             otmp = uwep;
 164                         } else {
 165                             if(!otmp)
 166                                 pline("You are now empty-handed.");
 167                             else if(otmp->cursed)
 168                                 pline("The %s %s to your hand!",
 169                                     aobjnam(otmp, "weld"),
 170                                     (otmp->quan == 1) ? "itself" : "themselves");
 171                             else
 172                                 pline("You now wield %s.", doname(otmp));
 173                             setuwep(otmp);
 174                         }
 175                 }
 176
 177                 if(!otmp)
 178                         type = DUST;
 179                 else
 180                 if(otmp->otyp == DAGGER || otmp->otyp == TWO_HANDED_SWORD ||
 181                 otmp->otyp == CRYSKNIFE ||
 182                 otmp->otyp == LONG_SWORD || otmp->otyp == AXE) {
 183                         type = ENGRAVE;
 184                         if((int)otmp->spe <= -3) {
 185                                 type = DUST;
 186                                 pline("Your %s too dull for engraving.",
 187                                         aobjnam(otmp, "are"));
 188                                 if(oep && oep->engr_type != DUST) return(1);
 189                         }
 190                 } else  type = DUST;
 191         }
 192         if(Levitation && type != BURN){         /* riv05!a3 */
 193                 pline("You can't reach the floor!");
 194                 return(1);
 195         }
 196         if(oep && oep->engr_type == DUST){
 197                   pline("You wipe out the message that was written here.");
 198                   del_engr(oep);
 199                   oep = 0;
 200         }
 201         if(type == DUST && oep){
 202         pline("You cannot wipe out the message that is %s in the rock.",
 203                     (oep->engr_type == BURN) ? "burned" : "engraved");
 204                   return(1);
 205         }
 206
 207         pline("What do you want to %s on the floor here? ",
 208           (type == ENGRAVE) ? "engrave" : (type == BURN) ? "burn" : "write");
 209         getlin(buf);
 210         clrlin();
 211         spct = 0;
 212         sp = buf;
 213         while(*sp == ' ') spct++, sp++;
 214         len = strlen(sp);
 215         if(!len || *buf == '\033') {
 216                 if(type == BURN) otmp->spe++;
 217                 return(0);
 218         }
 219
 220         switch(type) {
 221         case DUST:
 222         case BURN:
 223                 if(len > 15) {
 224                         multi = -(len/10);
 225                         nomovemsg = "You finished writing.";
 226                 }
 227                 break;
 228         case ENGRAVE:           /* here otmp != 0 */
 229                 {       int len2 = (otmp->spe + 3) * 2 + 1;
 230
 231                         pline("Your %s dull.", aobjnam(otmp, "get"));
 232                         if(len2 < len) {
 233                                 len = len2;
 234                                 sp[len] = 0;
 235                                 otmp->spe = -3;
 236                                 nomovemsg = "You cannot engrave more.";
 237                         } else {
 238                                 otmp->spe -= len/2;
 239                                 nomovemsg = "You finished engraving.";
 240                         }
 241                         multi = -len;
 242                 }
 243                 break;
 244         }
 245         if(oep) len += strlen(oep->engr_txt) + spct;
 246         ep = (struct engr *) alloc((unsigned)(sizeof(struct engr) + len + 1));
 247         ep->nxt_engr = head_engr;
 248         head_engr = ep;
 249         ep->engr_x = u.ux;
 250         ep->engr_y = u.uy;
 251         sp = (char *)(ep + 1);  /* (char *)ep + sizeof(struct engr) */
 252         ep->engr_txt = sp;
 253         if(oep) {
 254                 strcpy(sp, oep->engr_txt);
 255                 strcat(sp, buf);
 256                 del_engr(oep);
 257         } else
 258                 strcpy(sp, buf);
 259         ep->engr_lth = len+1;
 260         ep->engr_type = type;
 261         ep->engr_time = moves-multi;
 262
 263         /* kludge to protect pline against excessively long texts */
 264         if(len > BUFSZ-20) sp[BUFSZ-20] = 0;
 265
 266         return(1);
 267 }
 268
 269 void
 270 save_engravings(int fd)
 271 {
 272 struct engr *ep = head_engr;
 273         while(ep) {
 274                 if(!ep->engr_lth || !ep->engr_txt[0]){
 275                         ep = ep->nxt_engr;
 276                         continue;
 277                 }
 278                 bwrite(fd, (char *) & (ep->engr_lth), sizeof(ep->engr_lth));
 279                 bwrite(fd, (char *) ep, sizeof(struct engr) + ep->engr_lth);
 280                 ep = ep->nxt_engr;
 281         }
 282         bwrite(fd, (char *) nul, sizeof(unsigned));
 283         head_engr = 0;
 284 }
 285
 286 void
 287 rest_engravings(int fd)
 288 {
 289 struct engr *ep;
 290 unsigned lth;
 291         head_engr = 0;
 292         while(1) {
 293                 mread(fd, (char *) &lth, sizeof(unsigned));
 294                 if(lth == 0) return;
 295                 ep = (struct engr *) alloc(sizeof(struct engr) + lth);
 296                 mread(fd, (char *) ep, sizeof(struct engr) + lth);
 297                 ep->nxt_engr = head_engr;
 298                 ep->engr_txt = (char *) (ep + 1);       /* Andreas Bormann */
 299                 head_engr = ep;
 300         }
 301 }
 302
 303 static void
 304 del_engr(struct engr *ep)
 305 {
 306 struct engr *ept;
 307         if(ep == head_engr)
 308                 head_engr = ep->nxt_engr;
 309         else {
 310                 for(ept = head_engr; ept; ept = ept->nxt_engr) {
 311                         if(ept->nxt_engr == ep) {
 312                                 ept->nxt_engr = ep->nxt_engr;
 313                                 goto fnd;
 314                         }
 315                 }
 316                 impossible("Error in del_engr?");
 317                 return;
 318         fnd:    ;
 319         }
 320         free((char *) ep);
 321 }