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) 1986-2004, 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 #include <string.h>
  37 #include "misc.h"
  38 #include "player.h"
  39 #include "var.h"
  40 #include "xy.h"
  41 #include "file.h"
  42 #include "ship.h"
  43 #include "item.h"
  44 #include "nsc.h"
  45 #include "nat.h"
  46 #include "land.h"
  47 #include "plane.h"
  48 #include "nuke.h"
  49 #include "genitem.h"
  50 #include "commands.h"
  51
  52 static void expose_ship(struct shpstr *s1, struct shpstr *s2);
  53 static int tend_land(struct shpstr *tenderp, s_char *units);
  54
  55 int
  56 tend(void)
  57 {
  58     struct nstr_item targets;
  59     struct nstr_item tenders;
  60     struct shpstr tender;
  61     struct shpstr target;
  62     struct ichrstr *ip;
  63     struct mchrstr *vbase;
  64     int amt;
  65     int retval;
  66     int ontender;
  67     int ontarget;
  68     int maxtender;
  69     int maxtarget;
  70     int transfer;
  71     int total;
  72     int type;
  73     s_char *p;
  74     s_char prompt[512];
  75     s_char buf[1024];
  76
  77     if (!(p = getstarg(player->argp[1],
  78                        "Tend what commodity (or 'land')? ", buf)) || !*p)
  79         return RET_SYN;
  80
  81     if (!strncmp(p, "land", 4))
  82         type = EF_LAND;
  83     else if (NULL != (ip = item_by_name(p)))
  84         type = EF_SECTOR;
  85     else {
  86         pr("Can't tend '%s'\n", p);
  87         return RET_SYN;
  88     }
  89
  90     if (!snxtitem(&tenders, EF_SHIP,
  91                   getstarg(player->argp[2], "Tender(s)? ", buf)))
  92         return RET_SYN;
  93
  94     while (nxtitem(&tenders, (s_char *)&tender)) {
  95         if (!player->owner)
  96             continue;
  97         if (type == EF_LAND) {
  98             sprintf(prompt, "Land unit(s) to tend from %s? ",
  99                     prship(&tender));
 100             if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
 101                 continue;
 102             if (!check_ship_ok(&tender))
 103                 return RET_SYN;
 104             if (0 != (retval = tend_land(&tender, p)))
 105                 return retval;
 106             continue;
 107         }
 108         sprintf(prompt, "Number of %s to tend from %s? ",
 109                 ip->i_name, prship(&tender));
 110         if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
 111             continue;
 112         if (!check_ship_ok(&tender))
 113             return RET_SYN;
 114         if (!(amt = atoi(p))) {
 115             pr("Amount must be non-zero!\n");
 116             return RET_SYN;
 117         }
 118         ontender = tender.shp_item[ip->i_vtype];
 119         if (ontender == 0 && amt > 0) {
 120             pr("No %s on %s\n", ip->i_name, prship(&tender));
 121             return RET_FAIL;
 122         }
 123         vbase = &mchr[(int)tender.shp_type];
 124         maxtender = vbase->m_item[ip->i_vtype];
 125         if (maxtender == 0) {
 126             pr("A %s cannot hold any %s\n",
 127                mchr[(int)tender.shp_type].m_name, ip->i_name);
 128             break;
 129         }
 130         if (!snxtitem(&targets, EF_SHIP,
 131                       getstarg(player->argp[4], "Ships to be tended? ",
 132                                buf)))
 133             break;
 134         if (!check_ship_ok(&tender))
 135             return RET_SYN;
 136         total = 0;
 137         while (tend_nxtitem(&targets, (s_char *)&target)) {
 138             if (!player->owner &&
 139                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 140                 continue;
 141             if (target.shp_uid == tender.shp_uid)
 142                 continue;
 143             if (tender.shp_x != target.shp_x ||
 144                 tender.shp_y != target.shp_y)
 145                 continue;
 146             ontarget = target.shp_item[ip->i_vtype];
 147             if (ontarget == 0 && amt < 0) {
 148                 pr("No %s on %s\n", ip->i_name, prship(&target));
 149                 continue;
 150             }
 151             vbase = &mchr[(int)target.shp_type];
 152             maxtarget = vbase->m_item[ip->i_vtype];
 153             if (amt < 0) {
 154                 if (!player->owner)
 155                     amt = 0;
 156
 157                 /* take from target and give to tender */
 158                 transfer = min(ontarget, -amt);
 159                 transfer = min(maxtender - ontender, transfer);
 160                 if (transfer == 0)
 161                     continue;
 162                 target.shp_item[ip->i_vtype] = ontarget - transfer;
 163                 ontender += transfer;
 164                 total += transfer;
 165             } else {
 166                 /* give to target from tender */
 167                 transfer = min(ontender, amt);
 168                 transfer = min(transfer, maxtarget - ontarget);
 169                 if (transfer == 0)
 170                     continue;
 171                 target.shp_item[ip->i_vtype] = ontarget + transfer;
 172                 ontender -= transfer;
 173                 total += transfer;
 174             }
 175             expose_ship(&tender, &target);
 176             putship(target.shp_uid, &target);
 177             if (amt > 0 && ontender == 0) {
 178                 pr("%s out of %s\n", prship(&tender), ip->i_name);
 179                 break;
 180             }
 181         }
 182         pr("%d total %s transferred %s %s\n",
 183            total, ip->i_name, (amt > 0) ? "off of" : "to",
 184            prship(&tender));
 185         tender.shp_item[ip->i_vtype] = ontender;
 186         tender.shp_mission = 0;
 187         putship(tender.shp_uid, &tender);
 188     }
 189     return RET_OK;
 190 }
 191
 192 static void
 193 expose_ship(struct shpstr *s1, struct shpstr *s2)
 194 {
 195     if (s1->shp_pstage == PLG_INFECT && s2->shp_pstage == PLG_HEALTHY)
 196         s2->shp_pstage = PLG_EXPOSED;
 197     if (s2->shp_pstage == PLG_INFECT && s1->shp_pstage == PLG_HEALTHY)
 198         s1->shp_pstage = PLG_EXPOSED;
 199 }
 200
 201 /*
 202  * tend_nxtitem.c
 203  *
 204  * get next item from list. Stolen from nxtitem to make 1 itsy-bitsy change
 205  *
 206  * Dave Pare, 1989
 207  */
 208
 209 int
 210 tend_nxtitem(struct nstr_item *np, void *ptr)
 211 {
 212     struct genitem *gp;
 213     int selected;
 214
 215     if (np->sel == NS_UNDEF)
 216         return 0;
 217     gp = (struct genitem *)ptr;
 218     do {
 219         if (np->sel == NS_LIST) {
 220             np->index++;
 221             if (np->index >= np->size)
 222                 return 0;
 223             np->cur = np->list[np->index];
 224         } else {
 225             np->cur++;
 226         }
 227         if (!np->read(np->type, np->cur, ptr)) {
 228             /* if read fails, fatal */
 229             return 0;
 230         }
 231         selected = 1;
 232         switch (np->sel) {
 233         case NS_LIST:
 234             /* The change is to take the player->owner check out here */
 235             break;
 236         case NS_ALL:
 237             /* XXX maybe combine NS_LIST and NS_ALL later */
 238             break;
 239         case NS_DIST:
 240             if (!xyinrange(gp->x, gp->y, &np->range)) {
 241                 selected = 0;
 242                 break;
 243             }
 244             np->curdist = mapdist((int)gp->x, (int)gp->y,
 245                                   (int)np->cx, (int)np->cy);
 246             if (np->curdist > np->dist)
 247                 selected = 0;
 248             break;
 249         case NS_AREA:
 250             if (!xyinrange(gp->x, gp->y, &np->range))
 251                 selected = 0;
 252             if (gp->x == np->range.hx || gp->y == np->range.hy)
 253                 selected = 0;
 254             break;
 255         case NS_XY:
 256             if (gp->x != np->cx || gp->y != np->cy)
 257                 selected = 0;
 258             break;
 259         case NS_GROUP:
 260             if (np->group != gp->group)
 261                 selected = 0;
 262             break;
 263         default:
 264             CANT_HAPPEN("bad np->sel");
 265             return 0;
 266         }
 267         if (selected && np->ncond) {
 268             /* nstr_exec is expensive, so we do it last */
 269             if (!nstr_exec(np->cond, np->ncond, ptr))
 270                 selected = 0;
 271         }
 272     } while (!selected);
 273     return 1;
 274 }
 275
 276 static int
 277 tend_land(struct shpstr *tenderp, s_char *units)
 278 {
 279     struct nstr_item lni;
 280     struct nstr_item targets;
 281     struct shpstr target;
 282     struct lndstr land;
 283     struct plnstr plane;
 284     struct nstr_item pni;
 285     s_char buf[1024];
 286
 287     if (!snxtitem(&lni, EF_LAND, units))
 288         return RET_SYN;
 289
 290     while (nxtitem(&lni, (s_char *)&land)) {
 291         if (!player->owner)
 292             continue;
 293         if (land.lnd_ship != tenderp->shp_uid) {
 294             pr("%s is not on %s!\n", prland(&land), prship(tenderp));
 295             continue;
 296         }
 297         if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
 298             pr("%s does not have \"assault\" capability and can't be tended\n", prland(&land));
 299             continue;
 300         }
 301         if (!snxtitem(&targets, EF_SHIP,
 302                       getstarg(player->argp[4], "Ship to be tended? ",
 303                                buf)))
 304             break;
 305         if (!check_land_ok(&land))
 306             return RET_SYN;
 307         while (tend_nxtitem(&targets, (s_char *)&target)) {
 308             if (!player->owner &&
 309                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 310                 continue;
 311             if (target.shp_uid == tenderp->shp_uid)
 312                 continue;
 313             if (tenderp->shp_x != target.shp_x ||
 314                 tenderp->shp_y != target.shp_y)
 315                 continue;
 316
 317             /* Fit unit on ship */
 318             count_units(&target);
 319             getship(target.shp_uid, &target);
 320
 321             if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
 322                 if (mchr[(int)target.shp_type].m_nland)
 323                     pr("%s doesn't have room for any more land units!\n",
 324                        prship(&target));
 325                 else
 326                     pr("%s doesn't carry land units!\n", prship(&target));
 327                 continue;
 328             }
 329             pr("%s transferred from %s to %s\n",
 330                prland(&land), prship(tenderp), prship(&target));
 331             sprintf(buf, "loaded on your %s at %s",
 332                     prship(&target), xyas(target.shp_x, target.shp_y,
 333                                           target.shp_own));
 334             gift(target.shp_own, player->cnum, (s_char *)&land,
 335                  EF_LAND, buf);
 336             makelost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 337                      land.lnd_y);
 338             land.lnd_own = target.shp_own;
 339             makenotlost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 340                         land.lnd_y);
 341             land.lnd_ship = target.shp_uid;
 342             land.lnd_harden = 0;
 343             land.lnd_mission = 0;
 344             target.shp_nland++;
 345             putland(land.lnd_uid, &land);
 346             expose_ship(tenderp, &target);
 347             putship(target.shp_uid, &target);
 348             count_units(tenderp);
 349             putship(tenderp->shp_uid, tenderp);
 350             snxtitem_xy(&pni, EF_PLANE, land.lnd_x, land.lnd_y);
 351             while (nxtitem(&pni, (s_char *)&plane)) {
 352                 if (plane.pln_flags & PLN_LAUNCHED)
 353                     continue;
 354                 if (plane.pln_land != land.lnd_uid)
 355                     continue;
 356                 sprintf(buf, "loaded on %s", prship(&target));
 357                 gift(target.shp_own, player->cnum, (s_char *)&plane,
 358                      EF_PLANE, buf);
 359                 makelost(EF_PLANE, plane.pln_own, plane.pln_uid,
 360                          plane.pln_x, plane.pln_y);
 361                 plane.pln_own = target.shp_own;
 362                 makenotlost(EF_PLANE, plane.pln_own, plane.pln_uid,
 363                             plane.pln_x, plane.pln_y);
 364                 plane.pln_mission = 0;
 365                 putplane(plane.pln_uid, &plane);
 366             }
 367         }
 368     }
 369     return 0;
 370 }