456 lines
11 KiB
C
456 lines
11 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2013, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure, Markus Armbruster
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*
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* Empire is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* trad.c: Buy units/ships/planes/nukes from other nations.
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*
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* Known contributors to this file:
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* Dave Pare, 1986
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* Pat Loney, 1992
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* Steve McClure, 1996-2000
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*/
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#include <config.h>
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#include <ctype.h>
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#include "chance.h"
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#include "commands.h"
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#include "commodity.h"
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#include "empobj.h"
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#include "land.h"
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#include "loan.h"
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#include "news.h"
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#include "nuke.h"
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#include "optlist.h"
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#include "plane.h"
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#include "ship.h"
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#include "trade.h"
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#include "unit.h"
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/*
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* format: trade
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*/
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int
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trad(void)
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{
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struct sctstr sect;
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struct natstr *natp;
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struct comstr comt;
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int lotno;
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float price;
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coord sx, sy;
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int n;
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char *p;
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struct nstr_item ni;
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struct trdstr trade;
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struct trdstr tmpt;
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union empobj_storage tg;
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double canspend;
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time_t now;
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int bid;
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double tleft;
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double tally;
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int i;
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char buf[1024];
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if (!opt_MARKET) {
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pr("The market is disabled.\n");
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return RET_FAIL;
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}
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/* First, we execute all trades, so that we can only buy what is available. */
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check_market();
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check_trade();
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pr("\n Empire Trade Report\n ");
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prdate();
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n = 0;
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pr(" lot high bid by time left owner description\n");
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pr(" --- -------- -- --------- ----- -------------------------\n");
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snxtitem_all(&ni, EF_TRADE);
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while (nxtitem(&ni, &trade)) {
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if (trade.trd_owner == 0)
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continue;
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if (!trade_getitem(&trade, &tg)) {
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continue;
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};
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pr(" %3d ", ni.cur);
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(void)time(&now);
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tleft =
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TRADE_DELAY / 3600.0 - (now - trade.trd_markettime) / 3600.0;
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if (tleft < 0.0)
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tleft = 0.0;
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pr("$%7ld %2d %5.2f hrs ",
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trade.trd_price, trade.trd_maxbidder, tleft);
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trade_desc(&tg.gen); /* XXX */
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pr("\n");
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if (trade.trd_owner == player->cnum && !player->god)
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pr(" (your own lot)\n");
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n++;
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}
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if (n == 0) {
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pr("Nothing to buy at the moment...\n");
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return RET_OK;
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}
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p = getstring("Which lot to buy: ", buf);
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if (!p || !*p)
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return RET_OK;
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if (isdigit(*p) == 0)
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return RET_OK;
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lotno = atoi(p);
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if (lotno < 0 || lotno >= ni.cur) {
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pr("Bad lot number\n");
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return RET_OK;
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}
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if (!gettrade(lotno, &trade)) {
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pr("No such lot number\n");
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return RET_OK;
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}
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if (trade.trd_unitid < 0) {
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pr("Invalid lot number.\n");
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return RET_OK;
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}
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if (!trade_getitem(&trade, &tg)) {
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pr("Can't find trade #%d!\n", trade.trd_unitid);
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trade.trd_owner = 0;
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trade.trd_unitid = -1;
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if (!puttrade(lotno, &trade)) {
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logerror("trad: can't write trade");
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pr("Couldn't save after getitem failed; get help!\n");
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return RET_FAIL;
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}
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return RET_OK;
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}
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switch (trade.trd_type) {
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case EF_NUKE:
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case EF_PLANE:
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case EF_SHIP:
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case EF_LAND:
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break;
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default:
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pr("Bad unit type on lot number %d\n", lotno);
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return RET_FAIL;
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}
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if (trade.trd_owner == player->cnum) {
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pr("You can't buy from yourself!\n");
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return RET_OK;
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}
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price = trade.trd_price;
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natp = getnatp(player->cnum);
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if (natp->nat_money < price) {
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pr("You don't have %.2f to spend!\n", price);
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return RET_OK;
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}
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tally = 0.0;
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for (i = 0; gettrade(i, &tmpt); i++) {
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if (tmpt.trd_maxbidder == player->cnum &&
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tmpt.trd_unitid >= 0 && tmpt.trd_owner != player->cnum) {
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tally += tmpt.trd_price * tradetax;
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}
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}
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for (i = 0; getcomm(i, &comt); i++) {
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if (comt.com_maxbidder == player->cnum &&
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comt.com_owner != 0 && comt.com_owner != player->cnum) {
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tally += (comt.com_price * comt.com_amount) * buytax;
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}
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}
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canspend = natp->nat_money - tally;
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/* Find the destination sector for the trade */
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if (((trade.trd_type == EF_PLANE) && !pln_is_in_orbit(&tg.plane))
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|| (trade.trd_type == EF_NUKE)) {
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while (1) {
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p = getstring("Destination sector: ", buf);
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if (!trade_check_ok(&trade, &tg.gen))
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return RET_FAIL;
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if (!p) {
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return RET_FAIL;
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}
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if (!sarg_xy(p, &sx, &sy) || !getsect(sx, sy, §)) {
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pr("Bad sector designation; try again!\n");
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continue;
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}
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if (!player->owner) {
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pr("You don't own that sector; try again!\n");
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continue;
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}
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if (!(plchr[tg.plane.pln_type].pl_flags & P_V)) {
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if (!player->god && (sect.sct_type != SCT_AIRPT)) {
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pr("Destination sector is not an airfield!\n");
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continue;
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}
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if (!player->god && (sect.sct_effic < 60)) {
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pr("That airport still under construction!\n");
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continue;
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}
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}
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break;
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}
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} else if (trade.trd_type == EF_LAND) {
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while (1) {
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p = getstring("Destination sector: ", buf);
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if (!trade_check_ok(&trade, &tg.gen))
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return RET_FAIL;
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if (!p) {
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return RET_FAIL;
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}
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if (!sarg_xy(p, &sx, &sy) || !getsect(sx, sy, §)) {
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pr("Bad sector designation; try again!\n");
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continue;
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}
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if (!player->owner) {
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pr("You don't own that sector; try again!\n");
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continue;
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}
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if (!player->god && (sect.sct_type != SCT_HEADQ)) {
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pr("Destination sector is not a headquarters!\n");
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continue;
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}
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if (!player->god && (sect.sct_effic < 60)) {
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pr("That headquarters still under construction!\n");
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continue;
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}
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break;
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}
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} else {
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/* This trade doesn't teleport; make destination invalid */
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sx = 1;
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sy = 0;
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}
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p = getstring("How much do you bid: ", buf);
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if (!p || !*p)
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return RET_OK;
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if (!trade_check_ok(&trade, &tg.gen))
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return RET_FAIL;
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bid = atoi(p);
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if (bid < price)
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bid = price;
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if (bid > canspend) {
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pr("You don't have %.2f to spend!\n", price);
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return RET_OK;
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}
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if (bid > trade.trd_price) {
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/* Add five minutes to the time if less than 5 minutes left. */
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time(&now);
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if (((TRADE_DELAY - (now - trade.trd_markettime)) < 300) &&
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trade.trd_maxbidder != player->cnum)
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trade.trd_markettime += 300;
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trade.trd_price = bid;
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trade.trd_maxbidder = player->cnum;
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trade.trd_x = sx;
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trade.trd_y = sy;
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pr("Your bid on lot #%d is being considered.\n", lotno);
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if (!puttrade(lotno, &trade))
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pr("Problems with the trade file. Get help\n");
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} else
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pr("Your bid wasn't high enough (you need to bid more than someone else.)\n");
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check_trade();
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return RET_OK;
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}
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int
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check_trade(void)
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{
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int n;
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struct natstr *natp;
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struct trdstr trade;
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union empobj_storage tg;
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time_t now;
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double tleft;
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float price;
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int saveid;
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natid seller;
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for (n = 0; gettrade(n, &trade); n++) {
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if (trade.trd_unitid < 0)
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continue;
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if (!trade_getitem(&trade, &tg))
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continue;
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if (tg.gen.own == 0) {
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trade.trd_owner = 0;
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trade.trd_unitid = -1;
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puttrade(n, &trade);
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continue;
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}
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if (tg.gen.own != trade.trd_owner) {
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logerror("Something weird, tg.gen.own != trade.trd_owner!\n");
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trade.trd_owner = 0;
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trade.trd_unitid = -1;
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puttrade(n, &trade);
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continue;
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}
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if (trade.trd_owner == trade.trd_maxbidder)
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continue;
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(void)time(&now);
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tleft =
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TRADE_DELAY / 3600.0 - (now - trade.trd_markettime) / 3600.0;
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if (tleft < 0.0)
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tleft = 0.0;
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if (tleft > 0.0)
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continue;
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saveid = trade.trd_unitid;
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seller = trade.trd_owner;
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trade.trd_owner = 0;
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trade.trd_unitid = -1;
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if (!puttrade(n, &trade)) {
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logerror("Couldn't save trade after purchase; get help!\n");
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continue;
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}
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price = trade.trd_price;
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natp = getnatp(trade.trd_maxbidder);
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if (natp->nat_money < price) {
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nreport(trade.trd_maxbidder, N_WELCH_DEAL, seller, 1);
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wu(0, seller,
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"%s tried to buy a %s #%d from you for $%.2f\n",
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cname(trade.trd_maxbidder), trade_nameof(&trade, &tg.gen),
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saveid, price * tradetax);
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wu(0, seller, " but couldn't afford it.\n");
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wu(0, seller,
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" Your item was taken off the market.\n");
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wu(0, trade.trd_maxbidder,
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"You tried to buy %s #%d from %s for $%.2f\n",
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trade_nameof(&trade, &tg.gen), saveid, cname(seller),
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price);
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wu(0, trade.trd_maxbidder, "but couldn't afford it.\n");
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continue;
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}
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/* If we get this far, the sale will go through. */
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natp->nat_money -= price;
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putnat(natp);
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natp = getnatp(seller);
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natp->nat_money += roundavg(price * tradetax);
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putnat(natp);
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switch (trade.trd_type) {
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case EF_NUKE:
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tg.nuke.nuk_x = trade.trd_x;
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tg.nuke.nuk_y = trade.trd_y;
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tg.nuke.nuk_plane = -1;
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break;
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case EF_PLANE:
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if (!pln_is_in_orbit(&tg.plane)) {
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tg.plane.pln_x = trade.trd_x;
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tg.plane.pln_y = trade.trd_y;
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}
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if (opt_MOB_ACCESS) {
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tg.plane.pln_mobil = -(etu_per_update / sect_mob_neg_factor);
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game_tick_to_now(&tg.plane.pln_access);
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} else {
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tg.plane.pln_mobil = 0;
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}
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tg.plane.pln_harden = 0;
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tg.plane.pln_ship = -1;
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tg.plane.pln_land = -1;
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break;
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case EF_SHIP:
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break;
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case EF_LAND:
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tg.land.lnd_x = trade.trd_x;
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tg.land.lnd_y = trade.trd_y;
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if (opt_MOB_ACCESS) {
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tg.land.lnd_mobil = -(etu_per_update / sect_mob_neg_factor);
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game_tick_to_now(&tg.land.lnd_access);
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} else {
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tg.land.lnd_mobil = 0;
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}
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tg.land.lnd_harden = 0;
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unit_drop_cargo(&tg.gen, 0);
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tg.land.lnd_ship = -1;
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tg.land.lnd_land = -1;
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break;
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default:
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logerror("Bad trade type %d in trade\n", trade.trd_type);
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break;
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}
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unit_give_away(&tg.gen, trade.trd_maxbidder, 0);
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put_empobj(trade.trd_type, saveid, &tg.gen);
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nreport(seller, N_MAKE_SALE, trade.trd_maxbidder, 1);
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wu(0, seller, "%s bought %s #%d from you for $%.2f\n",
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cname(trade.trd_maxbidder), trade_nameof(&trade, &tg.gen),
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saveid, price * tradetax);
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wu(0, trade.trd_maxbidder,
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"The bidding is over & you bought %s #%d from %s for $%.2f\n",
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trade_nameof(&trade, &tg.gen), saveid, cname(seller),
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price);
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}
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return RET_OK;
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}
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int
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ontradingblock(int type, void *ptr)
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{
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struct trdstr trade;
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union empobj_storage tg;
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int n;
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for (n = 0; gettrade(n, &trade); n++) {
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if (trade.trd_unitid < 0)
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continue;
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if (!trade_getitem(&trade, &tg))
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continue;
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if (trade.trd_type != type)
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continue;
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if (tg.gen.uid == ((struct empobj *)ptr)->uid)
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return 1;
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}
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return 0;
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}
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void
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trdswitchown(int type, void *ptr, int newown)
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{
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struct trdstr trade;
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union empobj_storage tg;
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int n;
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for (n = 0; gettrade(n, &trade); n++) {
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if (trade.trd_unitid < 0)
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continue;
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if (!trade_getitem(&trade, &tg))
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continue;
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if (trade.trd_type != type)
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continue;
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if (tg.gen.uid != ((struct empobj *)ptr)->uid)
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continue;
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if (trade.trd_owner == trade.trd_maxbidder)
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trade.trd_maxbidder = newown;
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trade.trd_owner = newown;
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if (newown == 0)
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trade.trd_unitid = -1;
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puttrade(n, &trade);
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return;
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}
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}
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