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 #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 = whatitem(p, (s_char *)0)))
  84         type = EF_SECTOR;
  85     else {
  86         pr("Bad commodity.\n");
  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 = vl_find(ip->i_vtype, vbase->m_vtype,
 125                             vbase->m_vamt, (int)vbase->m_nv);
 126         if (maxtender == 0) {
 127             pr("A %s cannot hold any %s\n",
 128                mchr[(int)tender.shp_type].m_name, ip->i_name);
 129             break;
 130         }
 131         if (!snxtitem(&targets, EF_SHIP,
 132                       getstarg(player->argp[4], "Ships to be tended? ",
 133                                buf)))
 134             break;
 135         if (!check_ship_ok(&tender))
 136             return RET_SYN;
 137         total = 0;
 138         while (tend_nxtitem(&targets, (s_char *)&target)) {
 139             if (!player->owner &&
 140                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 141                 continue;
 142             if (target.shp_uid == tender.shp_uid)
 143                 continue;
 144             if (tender.shp_x != target.shp_x ||
 145                 tender.shp_y != target.shp_y)
 146                 continue;
 147             ontarget = target.shp_item[ip->i_vtype];
 148             if (ontarget == 0 && amt < 0) {
 149                 pr("No %s on %s\n", ip->i_name, prship(&target));
 150                 continue;
 151             }
 152             vbase = &mchr[(int)target.shp_type];
 153             maxtarget = vl_find(ip->i_vtype, vbase->m_vtype,
 154                                 vbase->m_vamt, (int)vbase->m_nv);
 155             if (amt < 0) {
 156                 if (!player->owner)
 157                     amt = 0;
 158
 159                 /* take from target and give to tender */
 160                 transfer = min(ontarget, -amt);
 161                 transfer = min(maxtender - ontender, transfer);
 162                 if (transfer == 0)
 163                     continue;
 164                 target.shp_item[ip->i_vtype] = ontarget - transfer;
 165                 ontender += transfer;
 166                 total += transfer;
 167             } else {
 168                 /* give to target from tender */
 169                 transfer = min(ontender, amt);
 170                 transfer = min(transfer, maxtarget - ontarget);
 171                 if (transfer == 0)
 172                     continue;
 173                 target.shp_item[ip->i_vtype] = ontarget + transfer;
 174                 ontender -= transfer;
 175                 total += transfer;
 176             }
 177             expose_ship(&tender, &target);
 178             putship(target.shp_uid, &target);
 179             if (amt > 0 && ontender == 0) {
 180                 pr("%s out of %s\n", prship(&tender), ip->i_name);
 181                 break;
 182             }
 183         }
 184         pr("%d total %s transferred %s %s\n",
 185            total, ip->i_name, (amt > 0) ? "off of" : "to",
 186            prship(&tender));
 187         tender.shp_item[ip->i_vtype] = ontender;
 188         tender.shp_mission = 0;
 189         putship(tender.shp_uid, &tender);
 190     }
 191     return RET_OK;
 192 }
 193
 194 static void
 195 expose_ship(struct shpstr *s1, struct shpstr *s2)
 196 {
 197     if (s1->shp_pstage == PLG_INFECT && s2->shp_pstage == PLG_HEALTHY)
 198         s2->shp_pstage = PLG_EXPOSED;
 199     if (s2->shp_pstage == PLG_INFECT && s1->shp_pstage == PLG_HEALTHY)
 200         s1->shp_pstage = PLG_EXPOSED;
 201 }
 202
 203 /*
 204  * tend_nxtitem.c
 205  *
 206  * get next item from list. Stolen from nxtitem to make 1 itsy-bitsy change
 207  *
 208  * Dave Pare, 1989
 209  */
 210
 211 int
 212 tend_nxtitem(struct nstr_item *np, caddr_t ptr)
 213 {
 214     struct genitem *gp;
 215     int selected;
 216
 217     if (np->sel == NS_UNDEF)
 218         return 0;
 219     gp = (struct genitem *)ptr;
 220     do {
 221         if (np->sel == NS_LIST) {
 222             np->index++;
 223             if (np->index >= np->size)
 224                 return 0;
 225             np->cur = np->list[np->index];
 226         } else {
 227             np->cur++;
 228         }
 229         if (!np->read(np->type, np->cur, ptr)) {
 230             /* if read fails, fatal */
 231             return 0;
 232         }
 233         selected = 1;
 234         switch (np->sel) {
 235         case NS_LIST:
 236             /* The change is to take the player->owner check out here */
 237             break;
 238         case NS_ALL:
 239             /* XXX maybe combine NS_LIST and NS_ALL later */
 240             break;
 241         case NS_DIST:
 242             if (!xyinrange(gp->x, gp->y, &np->range)) {
 243                 selected = 0;
 244                 break;
 245             }
 246             np->curdist = mapdist((int)gp->x, (int)gp->y,
 247                                   (int)np->cx, (int)np->cy);
 248             if (np->curdist > np->dist)
 249                 selected = 0;
 250             break;
 251         case NS_AREA:
 252             if (!xyinrange(gp->x, gp->y, &np->range))
 253                 selected = 0;
 254             if (gp->x == np->range.hx || gp->y == np->range.hy)
 255                 selected = 0;
 256             break;
 257         case NS_XY:
 258             if (gp->x != np->cx || gp->y != np->cy)
 259                 selected = 0;
 260             break;
 261         case NS_GROUP:
 262             if (np->group != gp->group)
 263                 selected = 0;
 264             break;
 265         default:
 266             logerror("nxtitem: bad selector %d\n", np->sel);
 267             return 0;
 268         }
 269         if (selected && np->ncond) {
 270             /* nstr_exec is expensive, so we do it last */
 271             if (!nstr_exec(np->cond, np->ncond, ptr, np->type))
 272                 selected = 0;
 273         }
 274     } while (!selected);
 275     return 1;
 276 }
 277
 278 static int
 279 tend_land(struct shpstr *tenderp, s_char *units)
 280 {
 281     struct nstr_item lni;
 282     struct nstr_item targets;
 283     struct shpstr target;
 284     struct lndstr land;
 285     struct plnstr plane;
 286     struct nstr_item pni;
 287     s_char buf[1024];
 288
 289     if (!snxtitem(&lni, EF_LAND, units))
 290         return RET_SYN;
 291
 292     while (nxtitem(&lni, (s_char *)&land)) {
 293         if (!player->owner)
 294             continue;
 295         if (land.lnd_ship != tenderp->shp_uid) {
 296             pr("%s is not on %s!\n", prland(&land), prship(tenderp));
 297             continue;
 298         }
 299         if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
 300             pr("%s does not have \"assault\" capability and can't be tended\n", prland(&land));
 301             continue;
 302         }
 303         if (!snxtitem(&targets, EF_SHIP,
 304                       getstarg(player->argp[4], "Ship to be tended? ",
 305                                buf)))
 306             break;
 307         if (!check_land_ok(&land))
 308             return RET_SYN;
 309         while (tend_nxtitem(&targets, (s_char *)&target)) {
 310             if (!player->owner &&
 311                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 312                 continue;
 313             if (target.shp_uid == tenderp->shp_uid)
 314                 continue;
 315             if (tenderp->shp_x != target.shp_x ||
 316                 tenderp->shp_y != target.shp_y)
 317                 continue;
 318
 319             /* Fit unit on ship */
 320             count_units(&target);
 321             getship(target.shp_uid, &target);
 322
 323             if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
 324                 if (mchr[(int)target.shp_type].m_nland)
 325                     pr("%s doesn't have room for any more land units!\n",
 326                        prship(&target));
 327                 else
 328                     pr("%s doesn't carry land units!\n", prship(&target));
 329                 continue;
 330             }
 331             pr("%s transferred from %s to %s\n",
 332                prland(&land), prship(tenderp), prship(&target));
 333             sprintf(buf, "loaded on your %s at %s",
 334                     prship(&target), xyas(target.shp_x, target.shp_y,
 335                                           target.shp_own));
 336             gift(target.shp_own, player->cnum, (s_char *)&land,
 337                  EF_LAND, buf);
 338             makelost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 339                      land.lnd_y);
 340             land.lnd_own = target.shp_own;
 341             makenotlost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 342                         land.lnd_y);
 343             land.lnd_ship = target.shp_uid;
 344             land.lnd_harden = 0;
 345             land.lnd_mission = 0;
 346             target.shp_nland++;
 347             putland(land.lnd_uid, &land);
 348             expose_ship(tenderp, &target);
 349             putship(target.shp_uid, &target);
 350             count_units(tenderp);
 351             putship(tenderp->shp_uid, tenderp);
 352             snxtitem_xy(&pni, EF_PLANE, land.lnd_x, land.lnd_y);
 353             while (nxtitem(&pni, (s_char *)&plane)) {
 354                 if (plane.pln_flags & PLN_LAUNCHED)
 355                     continue;
 356                 if (plane.pln_land != land.lnd_uid)
 357                     continue;
 358                 sprintf(buf, "loaded on %s", prship(&target));
 359                 gift(target.shp_own, player->cnum, (s_char *)&plane,
 360                      EF_PLANE, buf);
 361                 makelost(EF_PLANE, plane.pln_own, plane.pln_uid,
 362                          plane.pln_x, plane.pln_y);
 363                 plane.pln_own = target.shp_own;
 364                 makenotlost(EF_PLANE, plane.pln_own, plane.pln_uid,
 365                             plane.pln_x, plane.pln_y);
 366                 plane.pln_mission = 0;
 367                 putplane(plane.pln_uid, &plane);
 368             }
 369         }
 370     }
 371     return 0;
 372 }