2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2011, 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 * trdsub.c: Trade helper functions
29 * Known contributors to this file:
49 #include "prototypes.h"
56 trade_check_ok(struct trdstr *tp, union empobj_storage *tgp)
58 return check_trade_ok(tp) && trade_check_item_ok(tgp);
62 trade_check_item_ok(union empobj_storage *tgp)
64 if (tgp->gen.ef_type == EF_LAND)
65 return check_land_ok(&tgp->land);
66 if (tgp->gen.ef_type == EF_PLANE)
67 return check_plane_ok(&tgp->plane);
68 if (tgp->gen.ef_type == EF_SHIP)
69 return check_ship_ok(&tgp->ship);
70 if (tgp->gen.ef_type == EF_NUKE)
71 return check_nuke_ok(&tgp->nuke);
73 pr("Trade lot went bad!\n");
78 trade_nameof(struct trdstr *tp, union empobj_storage *tgp)
80 switch (tp->trd_type) {
82 return nchr[(int)tgp->nuke.nuk_type].n_name;
84 return plchr[(int)tgp->plane.pln_type].pl_name;
86 return mchr[(int)tgp->ship.shp_type].m_name;
88 return lchr[(int)tgp->land.lnd_type].l_name;
90 return "Bad trade type, get help";
94 * Describe an item up for sale. "tgp" is a union containing
95 * the details of the generic item.
96 * Return 1 on success, 0 on error
99 trade_desc(struct trdstr *tp, union empobj_storage *tgp)
112 switch (tp->trd_type) {
115 tp->trd_owner = np->nuk_own;
116 pr("(%3d) tech %d %d%% %s #%d",
117 tp->trd_owner, np->nuk_tech, np->nuk_effic,
118 nchr[(int)np->nuk_type].n_name, tp->trd_unitid);
122 tp->trd_owner = sp->shp_own;
123 pr("(%3d) tech %d %d%% %s [",
124 tp->trd_owner, sp->shp_tech, sp->shp_effic, prship(sp));
126 for (it = I_NONE + 1; it <= I_MAX; ++it) {
127 if (sp->shp_item[it])
128 pr("%c:%d ", ichr[it].i_mnem, sp->shp_item[it]);
130 pr("] #%d", tp->trd_unitid);
131 snxtitem_cargo(&ni, EF_PLANE, EF_SHIP, sp->shp_uid);
132 while (nxtitem(&ni, &plane)) {
133 pr("\n\t\t\t\t tech %3d %3d%% %s #%d",
136 plchr[(int)plane.pln_type].pl_name, plane.pln_uid);
137 if (getnuke(nuk_on_plane(&plane), &nuke))
138 pr("(%s)", nchr[nuke.nuk_type].n_name);
140 snxtitem_cargo(&ni, EF_LAND, EF_SHIP, sp->shp_uid);
141 while (nxtitem(&ni, &land)) {
142 pr("\n\t\t\t\t tech %3d %3d%% %s #%d",
145 lchr[(int)land.lnd_type].l_name, land.lnd_uid);
146 if (pln_first_on_land(&land) >= 0) {
147 snxtitem_cargo(&ni, EF_PLANE, EF_LAND, land.lnd_uid);
148 while (nxtitem(&ni, &plane)) {
149 pr("\n\t\t\t\t tech %3d %3d%% %s #%d",
152 plchr[(int)plane.pln_type].pl_name,
154 if (getnuke(nuk_on_plane(&plane), &nuke))
155 pr("(%s)", nchr[nuke.nuk_type].n_name);
159 getsect(sp->shp_x, sp->shp_y, §);
160 if (sect.sct_type != SCT_WATER)
162 cname(sect.sct_own), dchr[sect.sct_type].d_name);
168 tp->trd_owner = lp->lnd_own;
169 pr("(%3d) tech %d %d%% %s [",
171 lp->lnd_tech, lp->lnd_effic, lchr[(int)lp->lnd_type].l_name);
172 for (it = I_NONE + 1; it <= I_MAX; ++it) {
173 if (lp->lnd_item[it])
174 pr("%c:%d ", ichr[it].i_mnem, lp->lnd_item[it]);
176 pr("] #%d", tp->trd_unitid);
180 tp->trd_owner = pp->pln_own;
181 pr("(%3d) tech %d %d%% %s #%d",
185 plchr[(int)pp->pln_type].pl_name, tp->trd_unitid);
186 if (getnuke(nuk_on_plane(pp), &nuke))
187 pr("(%s)", nchr[nuke.nuk_type].n_name);
190 pr("flaky unit type %d", tp->trd_type);
197 trade_getitem(struct trdstr *tp, union empobj_storage *tgp)
199 if (!ef_read(tp->trd_type, tp->trd_unitid, tgp))
205 * Return amount due for LOAN at time PAYTIME.
208 loan_owed(struct lonstr *loan, time_t paytime)
210 time_t rtime; /* regular interest time */
211 time_t xtime; /* double interest time */
216 * Split interval paytime - l_lastpay into regular (up to
217 * l_duedate) and extended (beyond l_duedate) time.
219 rtime = loan->l_duedate - loan->l_lastpay;
220 xtime = paytime - loan->l_duedate;
229 if (CANT_HAPPEN(rtime < 0))
233 if (CANT_HAPPEN(dur <= 0))
235 rate = loan->l_irate / 100.0 / (dur * SECS_PER_DAY);
237 return loan->l_amtdue * (1.0 + (rtime + xtime * 2) * rate);