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) 1986-2006, 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 files README, COPYING and CREDITS in the root of the source
  23  *  tree for related information and legal notices.  It is expected
  24  *  that future 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 <config.h>
  37
  38 #include <string.h>
  39 #include "misc.h"
  40 #include "player.h"
  41 #include "plague.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 "genitem.h"
  51 #include "commands.h"
  52
  53 static void expose_ship(struct shpstr *s1, struct shpstr *s2);
  54 static int tend_land(struct shpstr *tenderp, s_char *units);
  55
  56 int
  57 tend(void)
  58 {
  59     struct nstr_item targets;
  60     struct nstr_item tenders;
  61     struct shpstr tender;
  62     struct shpstr target;
  63     struct ichrstr *ip;
  64     struct mchrstr *vbase;
  65     int amt;
  66     int retval;
  67     int ontender;
  68     int ontarget;
  69     int maxtender;
  70     int maxtarget;
  71     int transfer;
  72     int total;
  73     int type;
  74     s_char *p;
  75     s_char prompt[512];
  76     s_char buf[1024];
  77
  78     if (!(p = getstarg(player->argp[1],
  79                        "Tend what commodity (or 'land')? ", buf)) || !*p)
  80         return RET_SYN;
  81
  82     if (!strncmp(p, "land", 4))
  83         type = EF_LAND;
  84     else if (NULL != (ip = item_by_name(p)))
  85         type = EF_SECTOR;
  86     else {
  87         pr("Can't tend '%s'\n", p);
  88         return RET_SYN;
  89     }
  90
  91     if (!snxtitem(&tenders, EF_SHIP,
  92                   getstarg(player->argp[2], "Tender(s)? ", buf)))
  93         return RET_SYN;
  94
  95     while (nxtitem(&tenders, &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 = tender.shp_item[ip->i_uid];
 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 = vbase->m_item[ip->i_uid];
 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 (nxtitem(&targets, &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_uid];
 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 = vbase->m_item[ip->i_uid];
 154             if (amt < 0) {
 155                 if (!player->owner)
 156                     amt = 0;
 157
 158                 /* take from target and give to tender */
 159                 transfer = MIN(ontarget, -amt);
 160                 transfer = MIN(maxtender - ontender, transfer);
 161                 if (transfer == 0)
 162                     continue;
 163                 target.shp_item[ip->i_uid] = ontarget - transfer;
 164                 ontender += transfer;
 165                 total += transfer;
 166             } else {
 167                 /* give to target from tender */
 168                 transfer = MIN(ontender, amt);
 169                 transfer = MIN(transfer, maxtarget - ontarget);
 170                 if (transfer == 0)
 171                     continue;
 172                 target.shp_item[ip->i_uid] = ontarget + transfer;
 173                 ontender -= transfer;
 174                 total += transfer;
 175                 if (transfer && target.shp_own != player->cnum) {
 176                     wu(0, target.shp_own, "%s tended %d %s to %s\n",
 177                        cname(player->cnum), total, ip->i_name,
 178                        prship(&target));
 179                 }
 180             }
 181             expose_ship(&tender, &target);
 182             putship(target.shp_uid, &target);
 183             if (amt > 0 && ontender == 0) {
 184                 pr("%s out of %s\n", prship(&tender), ip->i_name);
 185                 break;
 186             }
 187         }
 188         pr("%d total %s transferred %s %s\n",
 189            total, ip->i_name, (amt > 0) ? "off of" : "to",
 190            prship(&tender));
 191         tender.shp_item[ip->i_uid] = ontender;
 192         tender.shp_mission = 0;
 193         putship(tender.shp_uid, &tender);
 194     }
 195     return RET_OK;
 196 }
 197
 198 static void
 199 expose_ship(struct shpstr *s1, struct shpstr *s2)
 200 {
 201     if (s1->shp_pstage == PLG_INFECT && s2->shp_pstage == PLG_HEALTHY)
 202         s2->shp_pstage = PLG_EXPOSED;
 203     if (s2->shp_pstage == PLG_INFECT && s1->shp_pstage == PLG_HEALTHY)
 204         s1->shp_pstage = PLG_EXPOSED;
 205 }
 206
 207 static int
 208 tend_land(struct shpstr *tenderp, s_char *units)
 209 {
 210     struct nstr_item lni;
 211     struct nstr_item targets;
 212     struct shpstr target;
 213     struct lndstr land;
 214     struct plnstr plane;
 215     struct nstr_item pni;
 216     s_char buf[1024];
 217
 218     if (!snxtitem(&lni, EF_LAND, units))
 219         return RET_SYN;
 220
 221     while (nxtitem(&lni, &land)) {
 222         if (!player->owner)
 223             continue;
 224         if (land.lnd_ship != tenderp->shp_uid) {
 225             pr("%s is not on %s!\n", prland(&land), prship(tenderp));
 226             continue;
 227         }
 228         if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
 229             pr("%s does not have \"assault\" capability and can't be tended\n", prland(&land));
 230             continue;
 231         }
 232         if (!snxtitem(&targets, EF_SHIP,
 233                       getstarg(player->argp[4], "Ship to be tended? ",
 234                                buf)))
 235             break;
 236         if (!check_land_ok(&land))
 237             return RET_SYN;
 238         while (nxtitem(&targets, &target)) {
 239             if (!player->owner &&
 240                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 241                 continue;
 242             if (target.shp_uid == tenderp->shp_uid)
 243                 continue;
 244             if (tenderp->shp_x != target.shp_x ||
 245                 tenderp->shp_y != target.shp_y)
 246                 continue;
 247
 248             /* Fit unit on ship */
 249             count_units(&target);
 250             getship(target.shp_uid, &target);
 251
 252             if ((mchr[(int)target.shp_type].m_flags & M_SUB) &&
 253                 (lchr[(int)land.lnd_type].l_flags & L_SPY) &&
 254                 !mchr[(int)target.shp_type].m_nland) {
 255                 if (target.shp_nland > 1) {
 256                     pr("%s doesn't have room for more than two spy units!\n",
 257                        prship(&target));
 258                     continue;
 259                 }
 260             } else if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
 261                 if (mchr[(int)target.shp_type].m_nland)
 262                     pr("%s doesn't have room for any more land units!\n",
 263                        prship(&target));
 264                 else
 265                     pr("%s doesn't carry land units!\n", prship(&target));
 266                 continue;
 267             }
 268             pr("%s transferred from %s to %s\n",
 269                prland(&land), prship(tenderp), prship(&target));
 270             sprintf(buf, "loaded on your %s at %s",
 271                     prship(&target), xyas(target.shp_x, target.shp_y,
 272                                           target.shp_own));
 273             gift(target.shp_own, player->cnum, &land, EF_LAND, buf);
 274             makelost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 275                      land.lnd_y);
 276             land.lnd_own = target.shp_own;
 277             makenotlost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 278                         land.lnd_y);
 279             land.lnd_ship = target.shp_uid;
 280             land.lnd_harden = 0;
 281             land.lnd_mission = 0;
 282             target.shp_nland++;
 283             putland(land.lnd_uid, &land);
 284             expose_ship(tenderp, &target);
 285             putship(target.shp_uid, &target);
 286             count_units(tenderp);
 287             putship(tenderp->shp_uid, tenderp);
 288             snxtitem_xy(&pni, EF_PLANE, land.lnd_x, land.lnd_y);
 289             while (nxtitem(&pni, &plane)) {
 290                 if (plane.pln_flags & PLN_LAUNCHED)
 291                     continue;
 292                 if (plane.pln_land != land.lnd_uid)
 293                     continue;
 294                 sprintf(buf, "loaded on %s", prship(&target));
 295                 gift(target.shp_own, player->cnum, &plane, EF_PLANE, buf);
 296                 makelost(EF_PLANE, plane.pln_own, plane.pln_uid,
 297                          plane.pln_x, plane.pln_y);
 298                 plane.pln_own = target.shp_own;
 299                 makenotlost(EF_PLANE, plane.pln_own, plane.pln_uid,
 300                             plane.pln_x, plane.pln_y);
 301                 plane.pln_mission = 0;
 302                 putplane(plane.pln_uid, &plane);
 303             }
 304         }
 305     }
 306     return 0;
 307 }