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 #ifdef Rel4
  37 #include <string.h>
  38 #endif /* Rel4 */
  39 #include "misc.h"
  40 #include "player.h"
  41 #include "var.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 "nuke.h"
  51 #include "genitem.h"
  52 #include "commands.h"
  53
  54 static void expose_ship(struct shpstr *s1, struct shpstr *s2);
  55 static int tend_land(struct shpstr *tenderp, s_char *units);
  56
  57 int
  58 tend(void)
  59 {
  60     struct nstr_item targets;
  61     struct nstr_item tenders;
  62     struct shpstr tender;
  63     struct shpstr target;
  64     struct ichrstr *ip;
  65     struct mchrstr *vbase;
  66     int amt;
  67     int retval;
  68     int ontender;
  69     int ontarget;
  70     int maxtender;
  71     int maxtarget;
  72     int transfer;
  73     int total;
  74     int type;
  75     s_char *p;
  76     s_char prompt[512];
  77     s_char buf[1024];
  78
  79     if (!(p = getstarg(player->argp[1],
  80                        "Tend what commodity (or 'land')? ", buf)) || !*p)
  81         return RET_SYN;
  82
  83     if (!strncmp(p, "land", 4))
  84         type = EF_LAND;
  85     else if (NULL != (ip = whatitem(p, (s_char *)0)))
  86         type = EF_SECTOR;
  87     else {
  88         pr("Bad commodity.\n");
  89         return RET_SYN;
  90     }
  91
  92     if (!snxtitem
  93         (&tenders, EF_SHIP, getstarg(player->argp[2], "Tender(s)? ", buf)))
  94         return RET_SYN;
  95
  96     while (nxtitem(&tenders, (s_char *)&tender)) {
  97         if (!player->owner)
  98             continue;
  99         if (type == EF_LAND) {
 100             sprintf(prompt, "Land unit(s) to tend from %s? ",
 101                     prship(&tender));
 102             if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
 103                 continue;
 104             if (!check_ship_ok(&tender))
 105                 return RET_SYN;
 106             if (0 != (retval = tend_land(&tender, p)))
 107                 return retval;
 108             continue;
 109         }
 110         sprintf(prompt, "Number of %s to tend from %s? ",
 111                 ip->i_name, prship(&tender));
 112         if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
 113             continue;
 114         if (!check_ship_ok(&tender))
 115             return RET_SYN;
 116         if (!(amt = atoi(p))) {
 117             pr("Amount must be non-zero!\n");
 118             return RET_SYN;
 119         }
 120         ontender = getvar(ip->i_vtype, (s_char *)&tender, EF_SHIP);
 121         if (ontender == 0 && amt > 0) {
 122             pr("No %s on %s\n", ip->i_name, prship(&tender));
 123             return RET_FAIL;
 124         }
 125         vbase = &mchr[(int)tender.shp_type];
 126         maxtender = vl_find(ip->i_vtype, vbase->m_vtype,
 127                             vbase->m_vamt, (int)vbase->m_nv);
 128         if (maxtender == 0) {
 129             pr("A %s cannot hold any %s\n",
 130                mchr[(int)tender.shp_type].m_name, ip->i_name);
 131             break;
 132         }
 133         if (!snxtitem(&targets, EF_SHIP,
 134                       getstarg(player->argp[4], "Ships to be tended? ",
 135                                buf)))
 136             break;
 137         if (!check_ship_ok(&tender))
 138             return RET_SYN;
 139         total = 0;
 140         while (tend_nxtitem(&targets, (s_char *)&target)) {
 141             if (!player->owner &&
 142                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 143                 continue;
 144             if (target.shp_uid == tender.shp_uid)
 145                 continue;
 146             if (tender.shp_x != target.shp_x ||
 147                 tender.shp_y != target.shp_y)
 148                 continue;
 149             ontarget = getvar(ip->i_vtype, (s_char *)&target, EF_SHIP);
 150             if (ontarget == 0 && amt < 0) {
 151                 pr("No %s on %s\n", ip->i_name, prship(&target));
 152                 continue;
 153             }
 154             vbase = &mchr[(int)target.shp_type];
 155             maxtarget = vl_find(ip->i_vtype, vbase->m_vtype,
 156                                 vbase->m_vamt, (int)vbase->m_nv);
 157             if (amt < 0) {
 158                 if (!player->owner)
 159                     amt = 0;
 160
 161                 /* take from target and give to tender */
 162                 transfer = min(ontarget, -amt);
 163                 transfer = min(maxtender - ontender, transfer);
 164                 if (transfer == 0)
 165                     continue;
 166                 putvar(ip->i_vtype, ontarget - transfer,
 167                        (s_char *)&target, EF_SHIP);
 168                 ontender += transfer;
 169                 total += transfer;
 170             } else {
 171                 /* give to target from tender */
 172                 transfer = min(ontender, amt);
 173                 transfer = min(transfer, maxtarget - ontarget);
 174                 if (transfer == 0)
 175                     continue;
 176                 putvar(ip->i_vtype, ontarget + transfer,
 177                        (s_char *)&target, EF_SHIP);
 178                 ontender -= transfer;
 179                 total += transfer;
 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         putvar(ip->i_vtype, ontender, (s_char *)&tender, EF_SHIP);
 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 (getvar(V_PSTAGE, (s_char *)s1, EF_SHIP) == PLG_INFECT &&
 202         getvar(V_PSTAGE, (s_char *)s2, EF_SHIP) == PLG_HEALTHY)
 203         putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)s2, EF_SHIP);
 204     if (getvar(V_PSTAGE, (s_char *)s2, EF_SHIP) == PLG_INFECT &&
 205         getvar(V_PSTAGE, (s_char *)s1, EF_SHIP) == PLG_HEALTHY)
 206         putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)s1, EF_SHIP);
 207 }
 208
 209 /*
 210  * tend_nxtitem.c
 211  *
 212  * get next item from list. Stolen from nxtitem to make 1 itsy-bitsy change
 213  *
 214  * Dave Pare, 1989
 215  */
 216
 217 int
 218 tend_nxtitem(struct nstr_item *np, caddr_t ptr)
 219 {
 220     struct genitem *gp;
 221     int selected;
 222
 223     if (np->sel == NS_UNDEF)
 224         return 0;
 225     gp = (struct genitem *)ptr;
 226     do {
 227         if (np->sel == NS_LIST) {
 228             np->index++;
 229             if (np->index >= np->size)
 230                 return 0;
 231             np->cur = np->list[np->index];
 232         } else {
 233             np->cur++;
 234         }
 235         if (!np->read(np->type, np->cur, ptr)) {
 236             /* if read fails, fatal */
 237             return 0;
 238         }
 239         selected = 1;
 240         switch (np->sel) {
 241         case NS_LIST:
 242             /* The change is to take the player->owner check out here */
 243             break;
 244         case NS_ALL:
 245             /* XXX maybe combine NS_LIST and NS_ALL later */
 246             break;
 247         case NS_DIST:
 248             if (!xyinrange(gp->x, gp->y, &np->range)) {
 249                 selected = 0;
 250                 break;
 251             }
 252             np->curdist = mapdist((int)gp->x, (int)gp->y,
 253                                   (int)np->cx, (int)np->cy);
 254             if (np->curdist > np->dist)
 255                 selected = 0;
 256             break;
 257         case NS_AREA:
 258             if (!xyinrange(gp->x, gp->y, &np->range))
 259                 selected = 0;
 260             if (gp->x == np->range.hx || gp->y == np->range.hy)
 261                 selected = 0;
 262             break;
 263         case NS_XY:
 264             if (gp->x != np->cx || gp->y != np->cy)
 265                 selected = 0;
 266             break;
 267         case NS_GROUP:
 268             if (np->group != gp->group)
 269                 selected = 0;
 270             break;
 271         default:
 272             logerror("nxtitem: bad selector %d\n", np->sel);
 273             return 0;
 274         }
 275         if (selected && np->ncond) {
 276             /* nstr_exec is expensive, so we do it last */
 277             if (!nstr_exec(np->cond, np->ncond, ptr, np->type))
 278                 selected = 0;
 279         }
 280     } while (!selected);
 281     return 1;
 282 }
 283
 284 static int
 285 tend_land(struct shpstr *tenderp, s_char *units)
 286 {
 287     struct nstr_item lni;
 288     struct nstr_item targets;
 289     struct shpstr target;
 290     struct lndstr land;
 291     struct plnstr plane;
 292     struct nstr_item pni;
 293     s_char buf[1024];
 294
 295     if (!snxtitem(&lni, EF_LAND, units))
 296         return RET_SYN;
 297
 298     while (nxtitem(&lni, (s_char *)&land)) {
 299         if (!player->owner)
 300             continue;
 301         if (land.lnd_ship != tenderp->shp_uid) {
 302             pr("%s is not on %s!\n", prland(&land), prship(tenderp));
 303             continue;
 304         }
 305         if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
 306             pr("%s does not have \"assault\" capability and can't be tended\n", prland(&land));
 307             continue;
 308         }
 309         if (!snxtitem(&targets, EF_SHIP,
 310                       getstarg(player->argp[4], "Ship to be tended? ",
 311                                buf)))
 312             break;
 313         if (!check_land_ok(&land))
 314             return RET_SYN;
 315         while (tend_nxtitem(&targets, (s_char *)&target)) {
 316             if (!player->owner &&
 317                 (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
 318                 continue;
 319             if (target.shp_uid == tenderp->shp_uid)
 320                 continue;
 321             if (tenderp->shp_x != target.shp_x ||
 322                 tenderp->shp_y != target.shp_y)
 323                 continue;
 324
 325             /* Fit unit on ship */
 326             count_units(&target);
 327             getship(target.shp_uid, &target);
 328
 329             if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
 330                 if (mchr[(int)target.shp_type].m_nland)
 331                     pr("%s doesn't have room for any more land units!\n",
 332                        prship(&target));
 333                 else
 334                     pr("%s doesn't carry land units!\n", prship(&target));
 335                 continue;
 336             }
 337             pr("%s transferred from %s to %s\n",
 338                prland(&land), prship(tenderp), prship(&target));
 339             sprintf(buf, "loaded on your %s at %s",
 340                     prship(&target), xyas(target.shp_x, target.shp_y,
 341                                           target.shp_own));
 342             gift(target.shp_own, player->cnum, (s_char *)&land,
 343                  EF_LAND, buf);
 344             makelost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 345                      land.lnd_y);
 346             land.lnd_own = target.shp_own;
 347             makenotlost(EF_LAND, land.lnd_own, land.lnd_uid, land.lnd_x,
 348                         land.lnd_y);
 349             land.lnd_ship = target.shp_uid;
 350             land.lnd_harden = 0;
 351             land.lnd_mission = 0;
 352             target.shp_nland++;
 353             putland(land.lnd_uid, &land);
 354             expose_ship(tenderp, &target);
 355             putship(target.shp_uid, &target);
 356             count_units(tenderp);
 357             putship(tenderp->shp_uid, tenderp);
 358             snxtitem_xy(&pni, EF_PLANE, land.lnd_x, land.lnd_y);
 359             while (nxtitem(&pni, (s_char *)&plane)) {
 360                 if (plane.pln_flags & PLN_LAUNCHED)
 361                     continue;
 362                 if (plane.pln_land != land.lnd_uid)
 363                     continue;
 364                 sprintf(buf, "loaded on %s", prship(&target));
 365                 gift(target.shp_own, player->cnum, (s_char *)&plane,
 366                      EF_PLANE, buf);
 367                 makelost(EF_PLANE, plane.pln_own, plane.pln_uid,
 368                          plane.pln_x, plane.pln_y);
 369                 plane.pln_own = target.shp_own;
 370                 makenotlost(EF_PLANE, plane.pln_own, plane.pln_uid,
 371                             plane.pln_x, plane.pln_y);
 372                 plane.pln_mission = 0;
 373                 putplane(plane.pln_uid, &plane);
 374             }
 375         }
 376     }
 377     return 0;
 378 }