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) 1986-2005, 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 "plague.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 "genitem.h"
  49 #include "commands.h"
  50
  51 static void expose_ship(struct shpstr *s1, struct shpstr *s2);
  52 static int tend_land(struct shpstr *tenderp, s_char *units);
  53
  54 int
  55 tend(void)
  56 {
  57     struct nstr_item targets;
  58     struct nstr_item tenders;
  59     struct shpstr tender;
  60     struct shpstr target;
  61     struct ichrstr *ip;
  62     struct mchrstr *vbase;
  63     int amt;
  64     int retval;
  65     int ontender;
  66     int ontarget;
  67     int maxtender;
  68     int maxtarget;
  69     int transfer;
  70     int total;
  71     int type;
  72     s_char *p;
  73     s_char prompt[512];
  74     s_char buf[1024];
  75
  76     if (!(p = getstarg(player->argp[1],
  77                        "Tend what commodity (or 'land')? ", buf)) || !*p)
  78         return RET_SYN;
  79
  80     if (!strncmp(p, "land", 4))
  81         type = EF_LAND;
  82     else if (NULL != (ip = item_by_name(p)))
  83         type = EF_SECTOR;
  84     else {
  85         pr("Can't tend '%s'\n", p);
  86         return RET_SYN;
  87     }
  88
  89     if (!snxtitem(&tenders, EF_SHIP,
  90                   getstarg(player->argp[2], "Tender(s)? ", buf)))
  91         return RET_SYN;
  92
  93     while (nxtitem(&tenders, (s_char *)&tender)) {
  94         if (!player->owner)
  95             continue;
  96         if (type == EF_LAND) {
  97             sprintf(prompt, "Land unit(s) to tend from %s? ",
  98                     prship(&tender));
  99             if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
 100                 continue;
 101             if (!check_ship_ok(&tender))
 102                 return RET_SYN;
 103             if (0 != (retval = tend_land(&tender, p)))
 104                 return retval;
 105             continue;
 106         }
 107         sprintf(prompt, "Number of %s to tend from %s? ",
 108                 ip->i_name, prship(&tender));
 109         if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
 110             continue;
 111         if (!check_ship_ok(&tender))
 112             return RET_SYN;
 113         if (!(amt = atoi(p))) {
 114             pr("Amount must be non-zero!\n");
 115             return RET_SYN;
 116         }
 117         ontender = tender.shp_item[ip->i_vtype];
 118         if (ontender == 0 && amt > 0) {
 119             pr("No %s on %s\n", ip->i_name, prship(&tender));
 120             return RET_FAIL;
 121         }
 122         vbase = &mchr[(int)tender.shp_type];
 123         maxtender = vbase->m_item[ip->i_vtype];
 124         if (maxtender == 0) {
 125             pr("A %s cannot hold any %s\n",
 126                mchr[(int)tender.shp_type].m_name, ip->i_name);
 127             break;
 128         }
 129         if (!snxtitem(&targets, EF_SHIP,
 130                       getstarg(player->argp[4], "Ships to be tended? ",
 131                                buf)))
 132             break;
 133         if (!check_ship_ok(&tender))
 134             return RET_SYN;
 135         total = 0;
 136         while (tend_nxtitem(&targets, (s_char *)&target)) {
 137             if (!player->owner &&
 138                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 139                 continue;
 140             if (target.shp_uid == tender.shp_uid)
 141                 continue;
 142             if (tender.shp_x != target.shp_x ||
 143                 tender.shp_y != target.shp_y)
 144                 continue;
 145             ontarget = target.shp_item[ip->i_vtype];
 146             if (ontarget == 0 && amt < 0) {
 147                 pr("No %s on %s\n", ip->i_name, prship(&target));
 148                 continue;
 149             }
 150             vbase = &mchr[(int)target.shp_type];
 151             maxtarget = vbase->m_item[ip->i_vtype];
 152             if (amt < 0) {
 153                 if (!player->owner)
 154                     amt = 0;
 155
 156                 /* take from target and give to tender */
 157                 transfer = min(ontarget, -amt);
 158                 transfer = min(maxtender - ontender, transfer);
 159                 if (transfer == 0)
 160                     continue;
 161                 target.shp_item[ip->i_vtype] = ontarget - transfer;
 162                 ontender += transfer;
 163                 total += transfer;
 164             } else {
 165                 /* give to target from tender */
 166                 transfer = min(ontender, amt);
 167                 transfer = min(transfer, maxtarget - ontarget);
 168                 if (transfer == 0)
 169                     continue;
 170                 target.shp_item[ip->i_vtype] = ontarget + transfer;
 171                 ontender -= transfer;
 172                 total += transfer;
 173             }
 174             expose_ship(&tender, &target);
 175             putship(target.shp_uid, &target);
 176             if (amt > 0 && ontender == 0) {
 177                 pr("%s out of %s\n", prship(&tender), ip->i_name);
 178                 break;
 179             }
 180         }
 181         pr("%d total %s transferred %s %s\n",
 182            total, ip->i_name, (amt > 0) ? "off of" : "to",
 183            prship(&tender));
 184         tender.shp_item[ip->i_vtype] = ontender;
 185         tender.shp_mission = 0;
 186         putship(tender.shp_uid, &tender);
 187     }
 188     return RET_OK;
 189 }
 190
 191 static void
 192 expose_ship(struct shpstr *s1, struct shpstr *s2)
 193 {
 194     if (s1->shp_pstage == PLG_INFECT && s2->shp_pstage == PLG_HEALTHY)
 195         s2->shp_pstage = PLG_EXPOSED;
 196     if (s2->shp_pstage == PLG_INFECT && s1->shp_pstage == PLG_HEALTHY)
 197         s1->shp_pstage = PLG_EXPOSED;
 198 }
 199
 200 /*
 201  * tend_nxtitem.c
 202  *
 203  * get next item from list. Stolen from nxtitem to make 1 itsy-bitsy change
 204  *
 205  * Dave Pare, 1989
 206  */
 207
 208 int
 209 tend_nxtitem(struct nstr_item *np, void *ptr)
 210 {
 211     struct genitem *gp;
 212     int selected;
 213
 214     if (np->sel == NS_UNDEF)
 215         return 0;
 216     gp = (struct genitem *)ptr;
 217     do {
 218         if (np->sel == NS_LIST) {
 219             np->index++;
 220             if (np->index >= np->size)
 221                 return 0;
 222             np->cur = np->list[np->index];
 223         } else {
 224             np->cur++;
 225         }
 226         if (!np->read(np->type, np->cur, ptr)) {
 227             /* if read fails, fatal */
 228             return 0;
 229         }
 230         selected = 1;
 231         switch (np->sel) {
 232         case NS_LIST:
 233             /* The change is to take the player->owner check out here */
 234             break;
 235         case NS_ALL:
 236             /* XXX maybe combine NS_LIST and NS_ALL later */
 237             break;
 238         case NS_DIST:
 239             if (!xyinrange(gp->x, gp->y, &np->range)) {
 240                 selected = 0;
 241                 break;
 242             }
 243             np->curdist = mapdist((int)gp->x, (int)gp->y,
 244                                   (int)np->cx, (int)np->cy);
 245             if (np->curdist > np->dist)
 246                 selected = 0;
 247             break;
 248         case NS_AREA:
 249             if (!xyinrange(gp->x, gp->y, &np->range))
 250                 selected = 0;
 251             if (gp->x == np->range.hx || gp->y == np->range.hy)
 252                 selected = 0;
 253             break;
 254         case NS_XY:
 255             if (gp->x != np->cx || gp->y != np->cy)
 256                 selected = 0;
 257             break;
 258         case NS_GROUP:
 259             if (np->group != gp->group)
 260                 selected = 0;
 261             break;
 262         default:
 263             CANT_HAPPEN("bad np->sel");
 264             return 0;
 265         }
 266         if (selected && np->ncond) {
 267             /* nstr_exec is expensive, so we do it last */
 268             if (!nstr_exec(np->cond, np->ncond, ptr))
 269                 selected = 0;
 270         }
 271     } while (!selected);
 272     return 1;
 273 }
 274
 275 static int
 276 tend_land(struct shpstr *tenderp, s_char *units)
 277 {
 278     struct nstr_item lni;
 279     struct nstr_item targets;
 280     struct shpstr target;
 281     struct lndstr land;
 282     struct plnstr plane;
 283     struct nstr_item pni;
 284     s_char buf[1024];
 285
 286     if (!snxtitem(&lni, EF_LAND, units))
 287         return RET_SYN;
 288
 289     while (nxtitem(&lni, (s_char *)&land)) {
 290         if (!player->owner)
 291             continue;
 292         if (land.lnd_ship != tenderp->shp_uid) {
 293             pr("%s is not on %s!\n", prland(&land), prship(tenderp));
 294             continue;
 295         }
 296         if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
 297             pr("%s does not have \"assault\" capability and can't be tended\n", prland(&land));
 298             continue;
 299         }
 300         if (!snxtitem(&targets, EF_SHIP,
 301                       getstarg(player->argp[4], "Ship to be tended? ",
 302                                buf)))
 303             break;
 304         if (!check_land_ok(&land))
 305             return RET_SYN;
 306         while (tend_nxtitem(&targets, (s_char *)&target)) {
 307             if (!player->owner &&
 308                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 309                 continue;
 310             if (target.shp_uid == tenderp->shp_uid)
 311                 continue;
 312             if (tenderp->shp_x != target.shp_x ||
 313                 tenderp->shp_y != target.shp_y)
 314                 continue;
 315
 316             /* Fit unit on ship */
 317             count_units(&target);
 318             getship(target.shp_uid, &target);
 319
 320             if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
 321                 if (mchr[(int)target.shp_type].m_nland)
 322                     pr("%s doesn't have room for any more land units!\n",
 323                        prship(&target));
 324                 else
 325                     pr("%s doesn't carry land units!\n", prship(&target));
 326                 continue;
 327             }
 328             pr("%s transferred from %s to %s\n",
 329                prland(&land), prship(tenderp), prship(&target));
 330             sprintf(buf, "loaded on your %s at %s",
 331                     prship(&target), xyas(target.shp_x, target.shp_y,
 332                                           target.shp_own));
 333             gift(target.shp_own, player->cnum, (s_char *)&land,
 334                  EF_LAND, buf);
 335             makelost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 336                      land.lnd_y);
 337             land.lnd_own = target.shp_own;
 338             makenotlost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 339                         land.lnd_y);
 340             land.lnd_ship = target.shp_uid;
 341             land.lnd_harden = 0;
 342             land.lnd_mission = 0;
 343             target.shp_nland++;
 344             putland(land.lnd_uid, &land);
 345             expose_ship(tenderp, &target);
 346             putship(target.shp_uid, &target);
 347             count_units(tenderp);
 348             putship(tenderp->shp_uid, tenderp);
 349             snxtitem_xy(&pni, EF_PLANE, land.lnd_x, land.lnd_y);
 350             while (nxtitem(&pni, (s_char *)&plane)) {
 351                 if (plane.pln_flags & PLN_LAUNCHED)
 352                     continue;
 353                 if (plane.pln_land != land.lnd_uid)
 354                     continue;
 355                 sprintf(buf, "loaded on %s", prship(&target));
 356                 gift(target.shp_own, player->cnum, (s_char *)&plane,
 357                      EF_PLANE, buf);
 358                 makelost(EF_PLANE, plane.pln_own, plane.pln_uid,
 359                          plane.pln_x, plane.pln_y);
 360                 plane.pln_own = target.shp_own;
 361                 makenotlost(EF_PLANE, plane.pln_own, plane.pln_uid,
 362                             plane.pln_x, plane.pln_y);
 363                 plane.pln_mission = 0;
 364                 putplane(plane.pln_uid, &plane);
 365             }
 366         }
 367     }
 368     return 0;
 369 }