git.pond.sub.org Git - empserver/blob - src/lib/commands/set.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  *  set.c: Place units/ships/planes/nukes up for sale.
  29  *
  30  *  Known contributors to this file:
  31  *     Dave Pare, 1986
  32  *     Pat Loney, 1992
  33  *     Steve McClure, 1996
  34  */
  35
  36 #include "misc.h"
  37 #include "var.h"
  38 #include "sect.h"
  39 #include "ship.h"
  40 #include "land.h"
  41 #include "nuke.h"
  42 #include "plane.h"
  43 #include "xy.h"
  44 #include "nsc.h"
  45 #include "nat.h"
  46 #include "trade.h"
  47 #include "file.h"
  48 #include "player.h"
  49 #include "commands.h"
  50 #include "optlist.h"
  51
  52 /*
  53  * format: set <type> <SHIP/NUKE> <PRICE>
  54  */
  55 int
  56 set(void)
  57 {
  58         char   *p;
  59         int     type;
  60         int     price;
  61         char    prompt[80];
  62         struct  trdstr trade;
  63         struct  nstr_item ni;
  64         struct  nstr_item ni_trade;
  65         union   trdgenstr item;
  66         union   trdgenstr check;
  67         struct  sctstr sect;
  68         int     freeslot;
  69         int     foundslot;
  70         int     id;
  71         time_t  now;
  72         s_char buf[1024];
  73
  74         if (!opt_MARKET) {
  75             pr("The market is disabled.\n");
  76             return RET_FAIL;
  77         }
  78         check_market();
  79         check_trade();
  80
  81         if ((p = getstarg(player->argp[1], "Item type? ", buf)) == 0)
  82                 return RET_SYN;
  83         if ((type = ef_byname(p)) < 0) {
  84                 pr("%s: not an item type\n", p);
  85                 return RET_SYN;
  86         }
  87         if (type == EF_SECTOR)
  88                 type = EF_SHIP;
  89         if (type == EF_NEWS)
  90                 type = EF_NUKE;
  91         if (type == EF_LOAN)
  92                 type = EF_LAND;
  93         if (!snxtitem(&ni, type, player->argp[2]))
  94                 return RET_SYN;
  95         while (nxtitem(&ni, (char *)&item)) {
  96                 if (!player->owner && !player->god)
  97                         continue;
  98                 getsect(item.gen.trg_x, item.gen.trg_y, &sect);
  99                 /*
 100                  * military control necessary to sell
 101                  * goodies in occupied territory.
 102                  */
 103                 if (sect.sct_oldown != player->cnum && !player->god) {
 104                         int     tot_mil=0;
 105                         struct  nstr_item ni;
 106                         struct  lndstr land;
 107                         snxtitem_xy(&ni, EF_LAND, sect.sct_x, sect.sct_y);
 108                         while (nxtitem(&ni, (s_char *)&land)){
 109                                 if (land.lnd_own == player->cnum)
 110                                         tot_mil  += total_mil(&land);
 111                         }
 112                         if (tot_mil+(getvar(V_MILIT, (char *)&sect, EF_SECTOR)) * 10
 113                             < getvar(V_CIVIL, (char *)&sect, EF_SECTOR)) {
 114                               pr("Military control required to sell goods.\n");
 115                                 return RET_FAIL;
 116                         }
 117                 }
 118                 trade.trd_type = type;
 119                 sprintf(prompt, "%s #%d; Price? ",
 120                         trade_nameof(&trade, &item), ni.cur);
 121                 memcpy(&check, &item, sizeof(union trdgenstr));
 122                 if ((p = getstarg(player->argp[3], prompt, buf))==0)
 123                         break;
 124                 if (memcmp(&check, &item, sizeof(union trdgenstr))) {
 125                     pr("That item has changed!\n");
 126                     return RET_FAIL;
 127                 }
 128                 if ((price = atoi(p)) < 0)
 129                         continue;
 130                 if (!ef_lock(EF_TRADE)) {
 131                         logerror("can't lock trade file");
 132                         return RET_SYS;
 133                 }
 134                 foundslot = -1;
 135                 freeslot = -1;
 136                 snxtitem_all(&ni_trade, EF_TRADE);
 137                 while (nxtitem(&ni_trade, (char *)&trade)) {
 138                         if (trade.trd_unitid < 0)
 139                                 freeslot = ni_trade.cur;
 140                         if (trade.trd_unitid == ni.cur &&
 141                             trade.trd_type == type) {
 142                                 foundslot = ni_trade.cur;
 143                                 break;
 144                         }
 145                 }
 146                 if (price == 0 && foundslot >= 0) {
 147                         pr("%s #%d (lot #%d) removed from trading\n",
 148                                 trade_nameof(&trade, &item),
 149                                 ni.cur, foundslot);
 150                         trade.trd_type = 0;
 151                         trade.trd_owner = 0;
 152                         trade.trd_unitid = -1;
 153                         trade.trd_price = 0;
 154                         (void) time(&now);
 155                         trade.trd_markettime = now;
 156                         trade.trd_maxbidder = player->cnum;
 157                         trade.trd_maxprice = 0;
 158                         puttrade(ni_trade.cur, &trade);
 159                 } else if (price > 0) {
 160                         trade.trd_x = item.gen.trg_x;
 161                         trade.trd_y = item.gen.trg_x;
 162                         trade.trd_type = type;
 163                         trade.trd_owner = player->cnum;
 164                         trade.trd_unitid = ni.cur;
 165                         trade.trd_price = price;
 166                         (void) time(&now);
 167                         trade.trd_markettime = now;
 168                         trade.trd_maxbidder = player->cnum;
 169                         trade.trd_maxprice = price;
 170                         if (foundslot >= 0)
 171                                 id = foundslot;
 172                         else if (freeslot >= 0)
 173                                 id = freeslot;
 174                         else {
 175                                 ef_extend(EF_TRADE, 1);
 176                                 id = ni_trade.cur;
 177                         }
 178                         puttrade(id, &trade);
 179                         pr("%s #%d (lot #%d) price %s to $%d\n",
 180                                 trade_nameof(&trade, &item), ni.cur,
 181                                 id, foundslot >= 0 ? "reset" : "set", price);
 182                 }
 183                 ef_unlock(EF_TRADE);
 184         }
 185         return RET_OK;
 186 }