git.pond.sub.org Git - empserver/blob - src/lib/commands/tend.c

   1 /*
   2  *  Empire - A multi-player, client/server Internet based war game.
   3  *  Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
   4  *                           Ken Stevens, Steve McClure
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ---
  21  *
  22  *  See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
  23  *  related information and legal notices. It is expected that any future
  24  *  projects/authors will amend these files as needed.
  25  *
  26  *  ---
  27  *
  28  *  tend.c: Transfer goodies from one ship to another.
  29  *
  30  *  Known contributors to this file:
  31  *     Dave Pare, 1986
  32  *     Thomas Ruschak, 1992
  33  *     Steve McClure, 2000
  34  */
  35
  36 #ifdef Rel4
  37 #include <string.h>
  38 #endif /* Rel4 */
  39 #include "misc.h"
  40 #include "player.h"
  41 #include "var.h"
  42 #include "xy.h"
  43 #include "file.h"
  44 #include "ship.h"
  45 #include "item.h"
  46 #include "nsc.h"
  47 #include "nat.h"
  48 #include "land.h"
  49 #include "plane.h"
  50 #include "nuke.h"
  51 #include "genitem.h"
  52 #include "commands.h"
  53
  54 static  void expose_ship(struct shpstr *s1, struct shpstr *s2);
  55 static  int tend_land(struct shpstr *tenderp, s_char *units);
  56
  57 int
  58 tend(void)
  59 {
  60         struct  nstr_item       targets;
  61         struct  nstr_item       tenders;
  62         struct  shpstr  tender;
  63         struct  shpstr  target;
  64         struct  ichrstr *ip;
  65         struct  mchrstr *vbase;
  66         int     amt;
  67         int     retval;
  68         int     ontender;
  69         int     ontarget;
  70         int     maxtender;
  71         int     maxtarget;
  72         int     transfer;
  73         int     total;
  74         int     type;
  75         s_char  *p;
  76         s_char  prompt[512];
  77         s_char  buf[1024];
  78
  79         if (!(p = getstarg(player->argp[1],
  80                 "Tend what commodity (or 'land')? ", buf)) || !*p)
  81                 return RET_SYN;
  82
  83         if (!strncmp(p, "land", 4))
  84                 type = EF_LAND;
  85         else if (NULL != (ip = whatitem(p, (s_char *)0)))
  86                 type = EF_SECTOR;
  87         else {
  88                 pr("Bad commodity.\n");
  89                 return RET_SYN;
  90         }
  91
  92         if (!snxtitem(&tenders, EF_SHIP, getstarg(player->argp[2], "Tender(s)? ", buf)))
  93                 return RET_SYN;
  94
  95         while (nxtitem(&tenders, (s_char *)&tender)) {
  96                 if (!player->owner)
  97                         continue;
  98                 if (type == EF_LAND) {
  99                         sprintf(prompt, "Land unit(s) to tend from %s? ",
 100                                 prship(&tender));
 101                         if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
 102                                 continue;
 103                         if (!check_ship_ok(&tender))
 104                             return RET_SYN;
 105                         if (0 != (retval=tend_land(&tender, p)))
 106                                 return retval;
 107                         continue;
 108                 }
 109                 sprintf(prompt, "Number of %s to tend from %s? ",
 110                         ip->i_name, prship(&tender));
 111                 if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
 112                         continue;
 113                 if (!check_ship_ok(&tender))
 114                     return RET_SYN;
 115                 if (!(amt = atoi(p))) {
 116                         pr("Amount must be non-zero!\n");
 117                         return RET_SYN;
 118                 }
 119                 ontender = getvar(ip->i_vtype, (s_char *)&tender, EF_SHIP);
 120                 if (ontender == 0 && amt > 0) {
 121                         pr("No %s on %s\n", ip->i_name, prship(&tender));
 122                         return RET_FAIL;
 123                 }
 124                 vbase = &mchr[(int)tender.shp_type];
 125                 maxtender = vl_find(ip->i_vtype, vbase->m_vtype,
 126                         vbase->m_vamt, (int)vbase->m_nv);
 127                 if (maxtender == 0) {
 128                         pr("A %s cannot hold any %s\n",
 129                                mchr[(int)tender.shp_type].m_name,
 130                                ip->i_name);
 131                         break;
 132                 }
 133                 if (!snxtitem(&targets, EF_SHIP,
 134                     getstarg(player->argp[4], "Ships to be tended? ", buf)))
 135                         break;
 136                 if (!check_ship_ok(&tender))
 137                     return RET_SYN;
 138                 total = 0;
 139                 while (tend_nxtitem(&targets, (s_char *)&target)) {
 140                         if (!player->owner &&
 141                                 (getrel(getnatp(target.shp_own),
 142                                 player->cnum) < FRIENDLY))
 143                                 continue;
 144                         if (target.shp_uid == tender.shp_uid)
 145                                 continue;
 146                         if (tender.shp_x != target.shp_x ||
 147                             tender.shp_y != target.shp_y)
 148                                 continue;
 149                         ontarget = getvar(ip->i_vtype,
 150                                 (s_char *)&target, EF_SHIP);
 151                         if (ontarget == 0 && amt < 0) {
 152                                 pr("No %s on %s\n",
 153                                         ip->i_name, prship(&target));
 154                                 continue;
 155                         }
 156                         vbase = &mchr[(int)target.shp_type];
 157                         maxtarget = vl_find(ip->i_vtype, vbase->m_vtype,
 158                                 vbase->m_vamt, (int)vbase->m_nv);
 159                         if (amt < 0) {
 160                                 if (!player->owner)
 161                                         amt=0;
 162
 163                                 /* take from target and give to tender */
 164                                 transfer = min(ontarget, -amt);
 165                                 transfer = min(maxtender - ontender, transfer);
 166                                 if (transfer == 0)
 167                                         continue;
 168                                 putvar(ip->i_vtype, ontarget - transfer,
 169                                         (s_char *)&target, EF_SHIP);
 170                                 ontender += transfer;
 171                                 total += transfer;
 172                         } else {
 173                                 /* give to target from tender */
 174                                 transfer = min(ontender, amt);
 175                                 transfer = min(transfer, maxtarget - ontarget);
 176                                 if (transfer == 0)
 177                                         continue;
 178                                 putvar(ip->i_vtype, ontarget + transfer,
 179                                         (s_char *)&target, EF_SHIP);
 180                                 ontender -= transfer;
 181                                 total += transfer;
 182                         }
 183                         expose_ship(&tender, &target);
 184                         putship(target.shp_uid, &target);
 185                         if (amt > 0 && ontender == 0) {
 186                                 pr("%s out of %s\n",
 187                                    prship(&tender),
 188                                    ip->i_name);
 189                                 break;
 190                         }
 191                 }
 192                 pr("%d total %s transferred %s %s\n",
 193                    total, ip->i_name, (amt > 0) ? "off of" : "to",
 194                    prship(&tender));
 195                 putvar(ip->i_vtype, ontender, (s_char *)&tender, EF_SHIP);
 196                 tender.shp_mission = 0;
 197                 putship(tender.shp_uid, &tender);
 198         }
 199         return RET_OK;
 200 }
 201
 202 static void
 203 expose_ship(struct shpstr *s1, struct shpstr *s2)
 204 {
 205         if (getvar(V_PSTAGE, (s_char *)s1, EF_SHIP) == PLG_INFECT &&
 206             getvar(V_PSTAGE, (s_char *)s2, EF_SHIP) == PLG_HEALTHY)
 207                 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)s2, EF_SHIP);
 208         if (getvar(V_PSTAGE, (s_char *)s2, EF_SHIP) == PLG_INFECT &&
 209             getvar(V_PSTAGE, (s_char *)s1, EF_SHIP) == PLG_HEALTHY)
 210                 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)s1, EF_SHIP);
 211 }
 212
 213 /*
 214  * tend_nxtitem.c
 215  *
 216  * get next item from list. Stolen from nxtitem to make 1 itsy-bitsy change
 217  *
 218  * Dave Pare, 1989
 219  */
 220
 221 int
 222 tend_nxtitem(struct nstr_item *np, caddr_t ptr)
 223 {
 224         struct  genitem *gp;
 225         int     selected;
 226
 227         if (np->sel == NS_UNDEF)
 228                 return 0;
 229         gp = (struct genitem *) ptr;
 230         do {
 231                 if (np->sel == NS_LIST) {
 232                         np->index++;
 233                         if (np->index >= np->size)
 234                                 return 0;
 235                         np->cur = np->list[np->index];
 236                 } else {
 237                         np->cur++;
 238                 }
 239                 if (!np->read(np->type, np->cur, ptr)) {
 240                         /* if read fails, fatal */
 241                         return 0;
 242                 }
 243                 selected = 1;
 244                 switch (np->sel) {
 245                 case NS_LIST:
 246                         /* The change is to take the player->owner check out here */
 247                         break;
 248                 case NS_ALL:
 249                         /* XXX maybe combine NS_LIST and NS_ALL later */
 250                         break;
 251                 case NS_DIST:
 252                         if (!xyinrange(gp->x, gp->y, &np->range)) {
 253                                 selected = 0;
 254                                 break;
 255                         }
 256                         np->curdist = mapdist((int)gp->x, (int)gp->y,
 257                                 (int)np->cx, (int)np->cy);
 258                         if (np->curdist > np->dist)
 259                                 selected = 0;
 260                         break;
 261                 case NS_AREA:
 262                         if (!xyinrange(gp->x, gp->y, &np->range))
 263                                 selected = 0;
 264                         if (gp->x == np->range.hx || gp->y == np->range.hy)
 265                                 selected = 0;
 266                         break;
 267                 case NS_XY:
 268                         if (gp->x != np->cx || gp->y != np->cy)
 269                                 selected = 0;
 270                         break;
 271                 case NS_GROUP:
 272                         if (np->group != gp->group)
 273                                 selected = 0;
 274                         break;
 275                 default:
 276                         logerror("nxtitem: bad selector %d\n", np->sel);
 277                         return 0;
 278                 }
 279                 if (selected && np->ncond) {
 280                         /* nstr_exec is expensive, so we do it last */
 281                         if (!nstr_exec(np->cond, np->ncond, ptr, np->type))
 282                                 selected = 0;
 283                 }
 284         } while (!selected);
 285         return 1;
 286 }
 287
 288 static int
 289 tend_land(struct shpstr *tenderp, s_char *units)
 290 {
 291         struct  nstr_item lni;
 292         struct  nstr_item targets;
 293         struct  shpstr  target;
 294         struct  lndstr land;
 295         struct  plnstr plane;
 296         struct  nstr_item pni;
 297         s_char  buf[1024];
 298
 299         if (!snxtitem(&lni, EF_LAND, units))
 300                 return RET_SYN;
 301
 302         while(nxtitem(&lni, (s_char *)&land)) {
 303                 if (!player->owner)
 304                         continue;
 305                 if (land.lnd_ship != tenderp->shp_uid) {
 306                         pr("%s is not on %s!\n",
 307                            prland(&land), prship(tenderp));
 308                         continue;
 309                 }
 310                 if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
 311                         pr("%s does not have \"assault\" capability and can't be tended\n", prland(&land));
 312                         continue;
 313                 }
 314                 if (!snxtitem(&targets, EF_SHIP,
 315                     getstarg(player->argp[4], "Ship to be tended? ", buf)))
 316                         break;
 317                 if (!check_land_ok(&land))
 318                     return RET_SYN;
 319                 while (tend_nxtitem(&targets, (s_char *)&target)) {
 320                         if (!player->owner &&
 321                                 (getrel(getnatp(target.shp_own),
 322                                 player->cnum) < FRIENDLY))
 323                                 continue;
 324                         if (target.shp_uid == tenderp->shp_uid)
 325                                 continue;
 326                         if (tenderp->shp_x != target.shp_x ||
 327                             tenderp->shp_y != target.shp_y)
 328                                 continue;
 329
 330                         /* Fit unit on ship */
 331                         count_units(&target);
 332                         getship(target.shp_uid,&target);
 333
 334                         if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
 335                                 if (mchr[(int)target.shp_type].m_nland)
 336                                         pr("%s doesn't have room for any more land units!\n",prship(&target));
 337                                 else
 338                                         pr("%s doesn't carry land units!\n",prship(&target));
 339                                 continue;
 340                         }
 341                         pr("%s transferred from %s to %s\n",
 342                            prland(&land), prship(tenderp), prship(&target));
 343                         sprintf(buf, "loaded on your %s at %s",
 344                                 prship(&target),xyas(target.shp_x,target.shp_y,
 345                                                     target.shp_own));
 346                         gift(target.shp_own,player->cnum,(s_char *)&land,
 347                              EF_LAND, buf);
 348                         makelost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x, land.lnd_y);
 349                         land.lnd_own = target.shp_own;
 350                         makenotlost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x, land.lnd_y);
 351                         land.lnd_ship = target.shp_uid;
 352                         land.lnd_harden = 0;
 353                         land.lnd_mission = 0;
 354                         target.shp_nland++;
 355                         putland(land.lnd_uid,&land);
 356                         expose_ship(tenderp, &target);
 357                         putship(target.shp_uid, &target);
 358                         count_units(tenderp);
 359                         putship(tenderp->shp_uid, tenderp);
 360                         snxtitem_xy(&pni,EF_PLANE,land.lnd_x,land.lnd_y);
 361                         while (nxtitem(&pni, (s_char *)&plane)) {
 362                                 if (plane.pln_flags & PLN_LAUNCHED)
 363                                         continue;
 364                                 if (plane.pln_land != land.lnd_uid)
 365                                         continue;
 366                                 sprintf(buf, "loaded on %s", prship(&target));
 367                                 gift(target.shp_own,player->cnum,(s_char *)&plane,
 368                                      EF_PLANE, buf);
 369                                 makelost(EF_PLANE, plane.pln_own, plane.pln_uid, plane.pln_x, plane.pln_y);
 370                                 plane.pln_own = target.shp_own;
 371                                 makenotlost(EF_PLANE, plane.pln_own, plane.pln_uid, plane.pln_x, plane.pln_y);
 372                                 plane.pln_mission = 0;
 373                                 putplane(plane.pln_uid,&plane);
 374                         }
 375                 }
 376         }
 377         return 0;
 378 }