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, &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 (nxtitem(&targets, &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 static int
 201 tend_land(struct shpstr *tenderp, s_char *units)
 202 {
 203     struct nstr_item lni;
 204     struct nstr_item targets;
 205     struct shpstr target;
 206     struct lndstr land;
 207     struct plnstr plane;
 208     struct nstr_item pni;
 209     s_char buf[1024];
 210
 211     if (!snxtitem(&lni, EF_LAND, units))
 212         return RET_SYN;
 213
 214     while (nxtitem(&lni, &land)) {
 215         if (!player->owner)
 216             continue;
 217         if (land.lnd_ship != tenderp->shp_uid) {
 218             pr("%s is not on %s!\n", prland(&land), prship(tenderp));
 219             continue;
 220         }
 221         if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
 222             pr("%s does not have \"assault\" capability and can't be tended\n", prland(&land));
 223             continue;
 224         }
 225         if (!snxtitem(&targets, EF_SHIP,
 226                       getstarg(player->argp[4], "Ship to be tended? ",
 227                                buf)))
 228             break;
 229         if (!check_land_ok(&land))
 230             return RET_SYN;
 231         while (nxtitem(&targets, &target)) {
 232             if (!player->owner &&
 233                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 234                 continue;
 235             if (target.shp_uid == tenderp->shp_uid)
 236                 continue;
 237             if (tenderp->shp_x != target.shp_x ||
 238                 tenderp->shp_y != target.shp_y)
 239                 continue;
 240
 241             /* Fit unit on ship */
 242             count_units(&target);
 243             getship(target.shp_uid, &target);
 244
 245             if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
 246                 if (mchr[(int)target.shp_type].m_nland)
 247                     pr("%s doesn't have room for any more land units!\n",
 248                        prship(&target));
 249                 else
 250                     pr("%s doesn't carry land units!\n", prship(&target));
 251                 continue;
 252             }
 253             pr("%s transferred from %s to %s\n",
 254                prland(&land), prship(tenderp), prship(&target));
 255             sprintf(buf, "loaded on your %s at %s",
 256                     prship(&target), xyas(target.shp_x, target.shp_y,
 257                                           target.shp_own));
 258             gift(target.shp_own, player->cnum, (s_char *)&land,
 259                  EF_LAND, buf);
 260             makelost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 261                      land.lnd_y);
 262             land.lnd_own = target.shp_own;
 263             makenotlost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 264                         land.lnd_y);
 265             land.lnd_ship = target.shp_uid;
 266             land.lnd_harden = 0;
 267             land.lnd_mission = 0;
 268             target.shp_nland++;
 269             putland(land.lnd_uid, &land);
 270             expose_ship(tenderp, &target);
 271             putship(target.shp_uid, &target);
 272             count_units(tenderp);
 273             putship(tenderp->shp_uid, tenderp);
 274             snxtitem_xy(&pni, EF_PLANE, land.lnd_x, land.lnd_y);
 275             while (nxtitem(&pni, &plane)) {
 276                 if (plane.pln_flags & PLN_LAUNCHED)
 277                     continue;
 278                 if (plane.pln_land != land.lnd_uid)
 279                     continue;
 280                 sprintf(buf, "loaded on %s", prship(&target));
 281                 gift(target.shp_own, player->cnum, (s_char *)&plane,
 282                      EF_PLANE, buf);
 283                 makelost(EF_PLANE, plane.pln_own, plane.pln_uid,
 284                          plane.pln_x, plane.pln_y);
 285                 plane.pln_own = target.shp_own;
 286                 makenotlost(EF_PLANE, plane.pln_own, plane.pln_uid,
 287                             plane.pln_x, plane.pln_y);
 288                 plane.pln_mission = 0;
 289                 putplane(plane.pln_uid, &plane);
 290             }
 291         }
 292     }
 293     return 0;
 294 }