git.pond.sub.org Git - empserver/blob - src/lib/commands/fuel.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  *  fuel.c: fuel ships/land units
  29  *
  30  *  Known contributors to this file:
  31  *
  32  */
  33
  34 #include <config.h>
  35
  36 #include "misc.h"
  37 #include "player.h"
  38 #include "plague.h"
  39 #include "xy.h"
  40 #include "ship.h"
  41 #include "plane.h"
  42 #include "land.h"
  43 #include "nat.h"
  44 #include "nsc.h"
  45 #include "file.h"
  46 #include "sect.h"
  47 #include "optlist.h"
  48 #include "commands.h"
  49
  50
  51 union item_u {
  52     struct shpstr ship;
  53     struct lndstr land;
  54 };
  55
  56 int
  57 fuel(void)
  58 {
  59     static int shp_or_lnd[] = { EF_SHIP, EF_LAND, EF_BAD };
  60     struct nstr_item ni;
  61     union item_u item, item2;
  62     int type;
  63     struct mchrstr *mp;
  64     struct lchrstr *lcp;
  65     s_char *p;
  66     int fueled;
  67     int land_fuel, ship_fuel;
  68     int oil_amt, pet_amt, fuel_amt, tot_fuel, max_amt;
  69     int move_amt;
  70     float extra;
  71     struct sctstr sect;
  72     struct natstr *natp;
  73     int harbor, sector;
  74     int fuelled_ship = -1;
  75     struct nstr_item tender, ltender;
  76     s_char prompt[128];
  77     s_char buf[1024];
  78
  79     if (opt_FUEL == 0) {
  80         pr("Option 'FUEL' not enabled\n");
  81         return RET_SYN;
  82     }
  83     if ((p =
  84          getstarg(player->argp[1], "Ship or land unit (s,l)? ", buf)) == 0)
  85         return RET_SYN;
  86     type = ef_byname_from(p, shp_or_lnd);
  87     if (type < 0) {
  88         pr("Ships or land units only! (s, l)\n");
  89         return RET_SYN;
  90     }
  91     sprintf(prompt, "%s(s)? ", ef_nameof(type));
  92     p = getstarg(player->argp[2], prompt, buf);
  93     if (!snxtitem(&ni, type, p))
  94         return RET_SYN;
  95     if (isdigit(*p))
  96         fuelled_ship = atoi(p);
  97     p = getstarg(player->argp[3], "Amount: ", buf);
  98     if (p == 0 || *p == 0)
  99         return RET_SYN;
 100     fuel_amt = atoi(p);
 101     if (fuel_amt <= 0) {
 102         pr("Fuel amount must be positive!\n");
 103         return RET_FAIL;
 104     }
 105
 106     while (nxtitem(&ni, &item)) {
 107         fueled = 0;
 108         if (type == EF_SHIP) {
 109             if (item.ship.shp_own != player->cnum) {
 110                 int rel;
 111
 112                 if (item.ship.shp_uid != fuelled_ship)
 113                     continue;
 114                 natp = getnatp(player->cnum);
 115                 rel = getrel(natp, item.ship.shp_own);
 116                 if (rel < FRIENDLY)
 117                     continue;
 118             }
 119             if (!getsect(item.ship.shp_x, item.ship.shp_y, &sect))
 120                 continue;
 121             if (!item.ship.shp_own)
 122                 continue;
 123
 124             if (shp_check_nav(&sect, &item.ship) == CN_LANDLOCKED) {
 125                 pr("%s is landlocked and cannot be fueled.\n",
 126                    prship(&item.ship));
 127                 continue;
 128             }
 129
 130             mp = &mchr[(int)item.ship.shp_type];
 131
 132             harbor = 0;
 133             if (sect_has_dock(&sect)) {
 134                 harbor = 1;
 135                 oil_amt = sect.sct_item[I_OIL];
 136                 pet_amt = sect.sct_item[I_PETROL];
 137                 if ((oil_amt + pet_amt) == 0)
 138                     harbor = 0;
 139
 140                 if (sect.sct_effic < 2) {
 141                     pr("The harbor at %s is not 2%% efficient yet.\n",
 142                        xyas(item.ship.shp_x,
 143                             item.ship.shp_y, player->cnum));
 144                     harbor = 0;
 145                 }
 146                 if ((sect.sct_own != player->cnum) && sect.sct_own)
 147                     harbor = 0;
 148             }
 149
 150             if ((mp->m_fuelu == 0) && (item.ship.shp_own == player->cnum)) {
 151                 pr("%s does not use fuel!\n", prship(&item.ship));
 152                 continue;
 153             }
 154
 155             if (harbor) {
 156                 ship_fuel = item.ship.shp_fuel;
 157                 oil_amt = sect.sct_item[I_OIL];
 158                 pet_amt = sect.sct_item[I_PETROL];
 159                 max_amt = mp->m_fuelc - ship_fuel;
 160
 161                 if (max_amt == 0) {
 162                     pr("%s already has a full fuel load.\n",
 163                        prship(&item.ship));
 164                     continue;
 165                 }
 166                 tot_fuel = (oil_amt * 50 + pet_amt * 5);
 167                 if (tot_fuel == 0) {
 168                     pr("No fuel in the harbor at %s!\n",
 169                        xyas(sect.sct_x, sect.sct_y, player->cnum));
 170                     continue;
 171                 }
 172                 move_amt = MIN(tot_fuel, fuel_amt);
 173                 move_amt = MIN(move_amt, max_amt);
 174
 175                 if (move_amt == 0)
 176                     continue;
 177
 178                 item.ship.shp_fuel += move_amt;
 179
 180                 fueled = 1;
 181                 if ((pet_amt * 5) >= move_amt) {
 182                     extra = ((float)move_amt / 5.0) - (move_amt / 5);
 183                     if (extra > 0.0)
 184                         sect.sct_item[I_PETROL]
 185                             = MAX((pet_amt - move_amt / 5) - 1, 0);
 186                     else
 187                         sect.sct_item[I_PETROL]
 188                             = MAX((pet_amt - move_amt / 5), 0);
 189                 } else {
 190                     sect.sct_item[I_PETROL] = 0;
 191                     move_amt -= pet_amt * 5;
 192                     extra = ((float)move_amt / 50.0) - (move_amt / 50);
 193                     sect.sct_item[I_OIL] = MAX(oil_amt - move_amt / 50, 0);
 194                     if (extra > 0.0)
 195                         sect.sct_item[I_OIL]
 196                             = MAX((oil_amt - move_amt / 50) - 1, 0);
 197                     else
 198                         sect.sct_item[I_OIL]
 199                             = MAX((oil_amt - move_amt / 50), 0);
 200                 }
 201
 202                 /* load plague */
 203                 if (sect.sct_pstage == PLG_INFECT
 204                     && item.ship.shp_pstage == PLG_HEALTHY)
 205                     item.ship.shp_pstage = PLG_EXPOSED;
 206
 207                 putsect(&sect);
 208                 putship(item.ship.shp_uid, &item.ship);
 209             } else {            /* not in a harbor */
 210                 if (!player->argp[4])
 211                     pr("%s is not in a supplied, efficient harbor\n",
 212                        prship(&item.ship));
 213                 if (!snxtitem (&tender, EF_SHIP,
 214                                getstarg(player->argp[4], "Oiler? ", buf)))
 215                     continue;
 216
 217                 if (!check_ship_ok(&item.ship))
 218                     continue;
 219
 220                 if (!nxtitem(&tender, &item2))
 221                     continue;
 222
 223                 if (!(mchr[(int)item2.ship.shp_type].m_flags & M_OILER)) {
 224                     pr("%s is not an oiler!\n", prship(&item2.ship));
 225                     continue;
 226                 }
 227                 if (item2.ship.shp_own != player->cnum) {
 228                     pr("You don't own that oiler!\n");
 229                     continue;
 230                 }
 231
 232                 if ((item2.ship.shp_x != item.ship.shp_x) ||
 233                     (item2.ship.shp_y != item.ship.shp_y)) {
 234                     pr("Not in the same sector!\n");
 235                     continue;
 236                 }
 237                 ship_fuel = item.ship.shp_fuel;
 238                 oil_amt = item2.ship.shp_item[I_OIL];
 239                 pet_amt = item2.ship.shp_item[I_PETROL];
 240                 max_amt = mp->m_fuelc - ship_fuel;
 241
 242                 if (max_amt == 0) {
 243                     pr("%s already has a full fuel load.\n",
 244                        prship(&item.ship));
 245                     continue;
 246                 }
 247                 tot_fuel = oil_amt * 50 + pet_amt * 5;
 248                 move_amt = MIN(tot_fuel, fuel_amt);
 249                 move_amt = MIN(move_amt, max_amt);
 250
 251                 if (move_amt == 0)
 252                     continue;
 253
 254                 item.ship.shp_fuel += move_amt;
 255
 256                 fueled = 1;
 257                 if ((pet_amt * 5) >= move_amt) {
 258                     extra = ((float)move_amt / 5.0) - (move_amt / 5);
 259                     if (extra > 0.0)
 260                         item2.ship.shp_item[I_PETROL]
 261                             = MAX((pet_amt - move_amt / 5) - 1, 0);
 262                     else
 263                         item2.ship.shp_item[I_PETROL]
 264                             = MAX((pet_amt - move_amt / 5), 0);
 265                 } else {
 266                     item2.ship.shp_item[I_PETROL] = 0;
 267                     move_amt -= pet_amt * 5;
 268                     extra = ((float)move_amt / 50.0) - (move_amt / 50);
 269                     item2.ship.shp_item[I_OIL]
 270                         = MAX(oil_amt - (move_amt / 50), 0);
 271                     if (extra > 0.0)
 272                         item2.ship.shp_item[I_OIL]
 273                             = MAX((oil_amt - move_amt / 50) - 1, 0);
 274                     else
 275                         item2.ship.shp_item[I_OIL]
 276                             = MAX((oil_amt - move_amt / 50), 0);
 277                 }
 278
 279                 /* load plague */
 280                 if (item2.ship.shp_pstage == PLG_INFECT
 281                     && item.ship.shp_pstage == PLG_HEALTHY)
 282                     item.ship.shp_pstage = PLG_EXPOSED;
 283
 284                 putship(item.ship.shp_uid, &item.ship);
 285                 /* quick hack -KHS */
 286                 if (item.ship.shp_uid == item2.ship.shp_uid)
 287                     item2.ship.shp_fuel = item.ship.shp_fuel;
 288                 putship(item2.ship.shp_uid, &item2.ship);
 289             }
 290             pr("%s", prship(&item.ship));
 291         } else {
 292             if (item.land.lnd_own != player->cnum)
 293                 continue;
 294
 295             if (!getsect(item.land.lnd_x, item.land.lnd_y, &sect))
 296                 continue;
 297
 298             if (!player->owner)
 299                 continue;
 300
 301             lcp = &lchr[(int)item.land.lnd_type];
 302
 303             sector = 1;
 304             oil_amt = sect.sct_item[I_OIL];
 305             pet_amt = sect.sct_item[I_PETROL];
 306
 307             if ((oil_amt + pet_amt) == 0)
 308                 sector = 0;
 309
 310             if ((item.land.lnd_fuelu == 0)
 311                 && (item.land.lnd_own == player->cnum)) {
 312                 pr("%s does not use fuel!\n", prland(&item.land));
 313                 continue;
 314             }
 315
 316             if (sector) {
 317                 land_fuel = item.land.lnd_fuel;
 318                 oil_amt = sect.sct_item[I_OIL];
 319                 pet_amt = sect.sct_item[I_PETROL];
 320                 max_amt = item.land.lnd_fuelc - land_fuel;
 321
 322                 if (max_amt == 0) {
 323                     pr("%s already has a full fuel load.\n",
 324                        prland(&item.land));
 325                     continue;
 326                 }
 327                 tot_fuel = (oil_amt * 50 + pet_amt * 5);
 328                 if (tot_fuel == 0) {
 329                     pr("No fuel in the sector at %s!\n",
 330                        xyas(sect.sct_x, sect.sct_y, player->cnum));
 331                     continue;
 332                 }
 333                 move_amt = MIN(tot_fuel, fuel_amt);
 334                 move_amt = MIN(move_amt, max_amt);
 335
 336                 if (move_amt == 0)
 337                     continue;
 338
 339                 item.land.lnd_fuel += move_amt;
 340
 341                 fueled = 1;
 342                 if ((pet_amt * 5) >= move_amt) {
 343                     extra = ((float)move_amt / 5.0) - (move_amt / 5);
 344                     if (extra > 0.0)
 345                         sect.sct_item[I_PETROL]
 346                             = MAX((pet_amt - move_amt / 5) - 1, 0);
 347                     else
 348                         sect.sct_item[I_PETROL]
 349                             = MAX((pet_amt - move_amt / 5), 0);
 350                 } else {
 351                     sect.sct_item[I_PETROL] = 0;
 352                     move_amt -= pet_amt * 5;
 353                     extra = ((float)move_amt / 50.0) - (move_amt / 50);
 354                     sect.sct_item[I_OIL] = MAX(oil_amt - move_amt / 50, 0);
 355                     if (extra > 0.0)
 356                         sect.sct_item[I_OIL]
 357                             = MAX((oil_amt - move_amt / 50) - 1, 0);
 358                     else
 359                         sect.sct_item[I_OIL]
 360                             = MAX((oil_amt - move_amt / 50), 0);
 361                 }
 362
 363                 /* load plague */
 364                 if (sect.sct_pstage == PLG_INFECT
 365                     && item.land.lnd_pstage == PLG_HEALTHY)
 366                     item.land.lnd_pstage = PLG_EXPOSED;
 367
 368                 putsect(&sect);
 369                 putland(item.land.lnd_uid, &item.land);
 370             } else {            /* not in a sector */
 371                 if (!player->argp[4])
 372                     pr("%s is not in a supplied sector\n",
 373                        prland(&item.land));
 374                 if (!snxtitem(&ltender, EF_LAND,
 375                               getstarg(player->argp[4], "Supply unit? ",
 376                                        buf)))
 377                     continue;
 378
 379                 if (!check_land_ok(&item.land))
 380                     continue;
 381
 382                 if (!nxtitem(&ltender, &item2))
 383                     continue;
 384
 385                 if (!(lchr[(int)item2.land.lnd_type].l_flags & L_SUPPLY)) {
 386                     pr("%s is not a supply unit!\n", prland(&item2.land));
 387                     continue;
 388                 }
 389                 if (item2.land.lnd_own != player->cnum) {
 390                     pr("You don't own that unit!\n");
 391                     continue;
 392                 }
 393
 394                 if ((item2.land.lnd_x != item.land.lnd_x) ||
 395                     (item2.land.lnd_y != item.land.lnd_y)) {
 396                     pr("Not in the same sector!\n");
 397                     continue;
 398                 }
 399                 land_fuel = item.land.lnd_fuel;
 400                 oil_amt = item2.land.lnd_item[I_OIL];
 401                 pet_amt = item2.land.lnd_item[I_PETROL];
 402                 max_amt = item.land.lnd_fuelc - land_fuel;
 403
 404                 if (max_amt == 0) {
 405                     pr("%s already has a full fuel load.\n",
 406                        prland(&item.land));
 407                     continue;
 408                 }
 409                 tot_fuel = oil_amt * 50 + pet_amt * 5;
 410                 move_amt = MIN(tot_fuel, fuel_amt);
 411                 move_amt = MIN(move_amt, max_amt);
 412
 413                 if (move_amt == 0)
 414                     continue;
 415
 416                 item.land.lnd_fuel += move_amt;
 417
 418                 fueled = 1;
 419                 if ((pet_amt * 5) >= move_amt) {
 420                     extra = ((float)move_amt / 5.0) - (move_amt / 5);
 421                     if (extra > 0.0)
 422                         item2.land.lnd_item[I_PETROL]
 423                             = MAX((pet_amt - move_amt / 5) - 1, 0);
 424                     else
 425                         item2.land.lnd_item[I_PETROL]
 426                             = MAX((pet_amt - move_amt / 5), 0);
 427                 } else {
 428                     item2.land.lnd_item[I_PETROL] = 0;
 429                     move_amt -= pet_amt * 5;
 430                     extra = ((float)move_amt / 50.0) - (move_amt / 50);
 431                     item2.land.lnd_item[I_OIL]
 432                         = MAX(oil_amt - move_amt / 50, 0);
 433                     if (extra > 0.0)
 434                         item2.land.lnd_item[I_OIL]
 435                             = MAX((oil_amt - move_amt / 50) - 1, 0);
 436                     else
 437                         item2.land.lnd_item[I_OIL]
 438                             = MAX((oil_amt - move_amt / 50), 0);
 439                 }
 440
 441                 /* load plague */
 442                 if (item2.land.lnd_pstage == PLG_INFECT
 443                     && item.land.lnd_pstage == PLG_HEALTHY)
 444                     item.land.lnd_pstage = PLG_EXPOSED;
 445
 446                 putland(item.land.lnd_uid, &item.land);
 447                 /* quick hack -KHS */
 448                 if (item2.land.lnd_uid == item.land.lnd_uid)
 449                     item2.land.lnd_fuel = item.land.lnd_fuel;
 450                 putland(item2.land.lnd_uid, &item2.land);
 451             }
 452             pr("%s", prland(&item.land));
 453         }
 454         if (fueled) {
 455             pr(" takes on %d fuel in %s\n",
 456                move_amt,
 457                xyas(item.ship.shp_x, item.ship.shp_y, player->cnum));
 458             if (player->cnum != item.ship.shp_own)
 459                 wu(0, item.ship.shp_own,
 460                    "%s takes on %d fuel in %s courtesy of %s\n",
 461                    prship(&item.ship),
 462                    move_amt,
 463                    xyas(item.ship.shp_x, item.ship.shp_y,
 464                         item.ship.shp_own), cname(player->cnum));
 465         }
 466     }
 467     return RET_OK;
 468 }