2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2015, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire 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 3 of the License, or
9 * (at your option) any later version.
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.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * trad.c: Buy units/ships/planes/nukes from other nations.
29 * Known contributors to this file:
32 * Steve McClure, 1996-2000
33 * Markus Armbruster, 2004-2013
41 #include "commodity.h"
70 union empobj_storage tg;
79 pr("The market is disabled.\n");
82 /* First, we execute all trades, so that we can only buy what is available. */
86 pr("\n Empire Trade Report\n ");
89 pr(" lot high bid by time left owner description\n");
90 pr(" --- -------- -- --------- ----- -------------------------\n");
92 snxtitem_all(&ni, EF_TRADE);
93 while (nxtitem(&ni, &trade)) {
94 if (trade.trd_owner == 0)
96 if (!trade_getitem(&trade, &tg)) {
101 tleft = trade.trd_markettime + TRADE_DELAY - now;
104 pr("$%7d %2d %5.2f hrs ",
105 trade.trd_price, trade.trd_maxbidder, tleft / 3600.0);
106 trade_desc(&tg.gen); /* XXX */
108 if (trade.trd_owner == player->cnum && !player->god)
109 pr(" (your own lot)\n");
113 pr("Nothing to buy at the moment...\n");
116 p = getstring("Which lot to buy: ", buf);
119 if (isdigit(*p) == 0)
122 if (lotno < 0 || lotno >= ni.cur) {
123 pr("Bad lot number\n");
126 if (!gettrade(lotno, &trade)) {
127 pr("No such lot number\n");
130 if (trade.trd_unitid < 0) {
131 pr("Invalid lot number.\n");
134 if (!trade_getitem(&trade, &tg)) {
135 pr("Can't find trade #%d!\n", trade.trd_unitid);
137 trade.trd_unitid = -1;
138 if (!puttrade(lotno, &trade)) {
139 logerror("trad: can't write trade");
140 pr("Couldn't save after getitem failed; get help!\n");
145 switch (trade.trd_type) {
152 pr("Bad unit type on lot number %d\n", lotno);
155 if (trade.trd_owner == player->cnum) {
156 pr("You can't buy from yourself!\n");
159 price = trade.trd_price;
160 natp = getnatp(player->cnum);
161 if (natp->nat_money < price) {
162 pr("You don't have %.2f to spend!\n", price);
166 for (i = 0; gettrade(i, &tmpt); i++) {
167 if (tmpt.trd_maxbidder == player->cnum &&
168 tmpt.trd_unitid >= 0 && tmpt.trd_owner != player->cnum) {
169 tally += tmpt.trd_price * tradetax;
172 for (i = 0; getcomm(i, &comt); i++) {
173 if (comt.com_maxbidder == player->cnum &&
174 comt.com_owner != 0 && comt.com_owner != player->cnum) {
175 tally += (comt.com_price * comt.com_amount) * buytax;
178 canspend = natp->nat_money - tally;
180 /* Find the destination sector for the trade */
181 if (((trade.trd_type == EF_PLANE) && !pln_is_in_orbit(&tg.plane))
182 || (trade.trd_type == EF_NUKE)) {
184 p = getstring("Destination sector: ", buf);
187 if (!trade_check_ok(&trade, &tg.gen))
189 if (!sarg_xy(p, &sx, &sy) || !getsect(sx, sy, §)) {
190 pr("Bad sector designation; try again!\n");
193 if (!player->owner) {
194 pr("You don't own that sector; try again!\n");
197 if (!(plchr[tg.plane.pln_type].pl_flags & P_V)) {
198 if (!player->god && (sect.sct_type != SCT_AIRPT)) {
199 pr("Destination sector is not an airfield!\n");
202 if (!player->god && (sect.sct_effic < 60)) {
203 pr("That airport still under construction!\n");
209 } else if (trade.trd_type == EF_LAND) {
211 p = getstring("Destination sector: ", buf);
214 if (!trade_check_ok(&trade, &tg.gen))
216 if (!sarg_xy(p, &sx, &sy) || !getsect(sx, sy, §)) {
217 pr("Bad sector designation; try again!\n");
220 if (!player->owner) {
221 pr("You don't own that sector; try again!\n");
224 if (!player->god && (sect.sct_type != SCT_HEADQ)) {
225 pr("Destination sector is not a headquarters!\n");
228 if (!player->god && (sect.sct_effic < 60)) {
229 pr("That headquarters still under construction!\n");
235 /* This trade doesn't teleport; make destination invalid */
240 p = getstring("How much do you bid: ", buf);
243 if (!trade_check_ok(&trade, &tg.gen))
248 if (bid > canspend) {
249 pr("You don't have %.2f to spend!\n", price);
252 if (bid > trade.trd_price) {
254 if (trade.trd_markettime + TRADE_DELAY - now < minutes(5) &&
255 trade.trd_maxbidder != player->cnum)
256 trade.trd_markettime = now + minutes(5) - TRADE_DELAY;
257 trade.trd_price = bid;
258 trade.trd_maxbidder = player->cnum;
261 pr("Your bid on lot #%d is being considered.\n", lotno);
262 if (!puttrade(lotno, &trade))
263 pr("Problems with the trade file. Get help\n");
265 pr("Your bid wasn't high enough (you need to bid more than someone else.)\n");
278 union empobj_storage tg;
284 for (n = 0; gettrade(n, &trade); n++) {
285 if (trade.trd_unitid < 0)
287 if (!trade_getitem(&trade, &tg))
289 if (tg.gen.own == 0) {
291 trade.trd_unitid = -1;
295 if (tg.gen.own != trade.trd_owner) {
296 logerror("Something weird, tg.gen.own != trade.trd_owner!\n");
298 trade.trd_unitid = -1;
303 if (trade.trd_owner == trade.trd_maxbidder)
307 if (trade.trd_markettime + TRADE_DELAY > now)
310 saveid = trade.trd_unitid;
311 seller = trade.trd_owner;
313 trade.trd_unitid = -1;
314 if (!puttrade(n, &trade)) {
315 logerror("Couldn't save trade after purchase; get help!\n");
319 price = trade.trd_price;
320 natp = getnatp(trade.trd_maxbidder);
321 if (natp->nat_money < price) {
322 nreport(trade.trd_maxbidder, N_WELCH_DEAL, seller, 1);
324 "%s tried to buy a %s #%d from you for $%.2f\n",
325 cname(trade.trd_maxbidder), trade_nameof(&trade, &tg.gen),
326 saveid, price * tradetax);
327 wu(0, seller, " but couldn't afford it.\n");
329 " Your item was taken off the market.\n");
330 wu(0, trade.trd_maxbidder,
331 "You tried to buy %s #%d from %s for $%d\n",
332 trade_nameof(&trade, &tg.gen), saveid, cname(seller),
334 wu(0, trade.trd_maxbidder, "but couldn't afford it.\n");
338 /* If we get this far, the sale will go through. */
340 natp->nat_money -= price;
343 natp = getnatp(seller);
344 natp->nat_money += roundavg(price * tradetax);
347 switch (trade.trd_type) {
349 tg.nuke.nuk_x = trade.trd_x;
350 tg.nuke.nuk_y = trade.trd_y;
351 tg.nuke.nuk_plane = -1;
354 if (!pln_is_in_orbit(&tg.plane)) {
355 tg.plane.pln_x = trade.trd_x;
356 tg.plane.pln_y = trade.trd_y;
358 if (opt_MOB_ACCESS) {
359 tg.plane.pln_mobil = -(etu_per_update / sect_mob_neg_factor);
360 game_tick_to_now(&tg.plane.pln_access);
362 tg.plane.pln_mobil = 0;
364 tg.plane.pln_harden = 0;
365 tg.plane.pln_ship = -1;
366 tg.plane.pln_land = -1;
371 tg.land.lnd_x = trade.trd_x;
372 tg.land.lnd_y = trade.trd_y;
373 if (opt_MOB_ACCESS) {
374 tg.land.lnd_mobil = -(etu_per_update / sect_mob_neg_factor);
375 game_tick_to_now(&tg.land.lnd_access);
377 tg.land.lnd_mobil = 0;
379 tg.land.lnd_harden = 0;
380 unit_drop_cargo(&tg.gen, 0);
381 tg.land.lnd_ship = -1;
382 tg.land.lnd_land = -1;
385 logerror("Bad trade type %d in trade\n", trade.trd_type);
388 unit_give_away(&tg.gen, trade.trd_maxbidder, 0);
389 put_empobj(trade.trd_type, saveid, &tg.gen);
391 nreport(seller, N_MAKE_SALE, trade.trd_maxbidder, 1);
392 wu(0, seller, "%s bought %s #%d from you for $%.2f\n",
393 cname(trade.trd_maxbidder), trade_nameof(&trade, &tg.gen),
394 saveid, price * tradetax);
395 wu(0, trade.trd_maxbidder,
396 "The bidding is over & you bought %s #%d from %s for $%d\n",
397 trade_nameof(&trade, &tg.gen), saveid, cname(seller),
404 ontradingblock(int type, void *ptr)
407 union empobj_storage tg;
410 for (n = 0; gettrade(n, &trade); n++) {
411 if (trade.trd_unitid < 0)
413 if (!trade_getitem(&trade, &tg))
415 if (trade.trd_type != type)
417 if (tg.gen.uid == ((struct empobj *)ptr)->uid)
424 trdswitchown(int type, struct empobj *obj, int newown)
427 union empobj_storage tg;
430 for (n = 0; gettrade(n, &trade); n++) {
431 if (trade.trd_unitid < 0)
433 if (!trade_getitem(&trade, &tg))
435 if (trade.trd_type != type)
437 if (tg.gen.uid != obj->uid)
439 if (trade.trd_owner == trade.trd_maxbidder)
440 trade.trd_maxbidder = newown;
441 trade.trd_owner = newown;
443 trade.trd_unitid = -1;