2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
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.
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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
28 * trdsub.c: Trade helper functions
30 * Known contributors to this file:
50 #include "prototypes.h"
57 trade_check_ok(struct trdstr *tp, union empobj_storage *tgp)
59 return check_trade_ok(tp) && trade_check_item_ok(tgp);
63 trade_check_item_ok(union empobj_storage *tgp)
65 if (tgp->gen.ef_type == EF_LAND)
66 return check_land_ok(&tgp->land);
67 if (tgp->gen.ef_type == EF_PLANE)
68 return check_plane_ok(&tgp->plane);
69 if (tgp->gen.ef_type == EF_SHIP)
70 return check_ship_ok(&tgp->ship);
71 if (tgp->gen.ef_type == EF_NUKE)
72 return check_nuke_ok(&tgp->nuke);
74 pr("Trade lot went bad!\n");
79 trade_nameof(struct trdstr *tp, union empobj_storage *tgp)
81 switch (tp->trd_type) {
83 return nchr[(int)tgp->nuke.nuk_type].n_name;
85 return plchr[(int)tgp->plane.pln_type].pl_name;
87 return mchr[(int)tgp->ship.shp_type].m_name;
89 return lchr[(int)tgp->land.lnd_type].l_name;
91 return "Bad trade type, get help";
95 * Describe an item up for sale. "tgp" is a union containing
96 * the details of the generic item.
97 * Return 1 on success, 0 on error
100 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);
132 snxtitem_all(&ni, EF_PLANE);
133 while (nxtitem(&ni, &plane)) {
134 if (plane.pln_ship == sp->shp_uid && plane.pln_own != 0) {
135 pr("\n\t\t\t\t tech %3d %3d%% %s #%d",
138 plchr[(int)plane.pln_type].pl_name, plane.pln_uid);
139 if (plane.pln_nuketype != -1) {
140 pr("(%s)", nchr[(int)plane.pln_nuketype].n_name);
144 snxtitem_all(&ni, EF_LAND);
145 while (nxtitem(&ni, &land)) {
146 if (land.lnd_ship == sp->shp_uid && land.lnd_own != 0) {
147 pr("\n\t\t\t\t tech %3d %3d%% %s #%d",
150 lchr[(int)land.lnd_type].l_name, land.lnd_uid);
151 if (land.lnd_nxlight) {
152 snxtitem_all(&ni, EF_PLANE);
153 while (nxtitem(&ni, &plane)) {
154 if (plane.pln_land == land.lnd_uid) {
155 pr("\n\t\t\t\t tech %3d %3d%% %s #%d",
158 plchr[(int)plane.pln_type].pl_name,
160 if (plane.pln_nuketype != -1) {
162 nchr[(int)plane.pln_nuketype].n_name);
170 getsect(sp->shp_x, sp->shp_y, §);
171 if (sect.sct_type != SCT_WATER)
173 cname(sect.sct_own), dchr[sect.sct_type].d_name);
179 tp->trd_owner = lp->lnd_own;
180 pr("(%3d) tech %d %d%% %s [",
182 lp->lnd_tech, lp->lnd_effic, lchr[(int)lp->lnd_type].l_name);
183 for (it = I_NONE + 1; it <= I_MAX; ++it) {
184 if (lp->lnd_item[it])
185 pr("%c:%d ", ichr[it].i_mnem, lp->lnd_item[it]);
187 pr("] #%d", tp->trd_unitid);
189 snxtitem_all(&ni, EF_PLANE);
190 while (nxtitem(&ni, &plane)) {
191 if (plane.pln_land == lp->lnd_uid && plane.pln_own != 0) {
192 pr("\n\t\t\t\t tech %3d %3d%% %s #%d",
195 plchr[(int)plane.pln_type].pl_name, plane.pln_uid);
196 if (plane.pln_nuketype != -1) {
197 pr("(%s)", nchr[(int)plane.pln_nuketype].n_name);
202 getsect(lp->lnd_x, lp->lnd_y, §);
206 tp->trd_owner = pp->pln_own;
207 pr("(%3d) tech %d %d%% %s #%d",
211 plchr[(int)pp->pln_type].pl_name, tp->trd_unitid);
212 if (pp->pln_nuketype != -1) {
213 pr("(%s)", nchr[(int)pp->pln_nuketype].n_name);
217 pr("flaky unit type %d", tp->trd_type);
224 trade_getitem(struct trdstr *tp, union empobj_storage *tgp)
226 if (!ef_read(tp->trd_type, tp->trd_unitid, tgp))
232 * Return amount due for LOAN at time PAYTIME.
235 loan_owed(struct lonstr *loan, time_t paytime)
237 time_t rtime; /* regular interest time */
238 time_t xtime; /* double interest time */
243 * Split interval paytime - l_lastpay into regular (up to
244 * l_duedate) and extended (beyond l_duedate) time.
246 rtime = loan->l_duedate - loan->l_lastpay;
247 xtime = paytime - loan->l_duedate;
256 if (CANT_HAPPEN(rtime < 0))
260 if (CANT_HAPPEN(dur <= 0))
262 rate = loan->l_irate / 100.0 / (dur * SECS_PER_DAY);
264 return loan->l_amtdue * (1.0 + (rtime + xtime * 2) * rate);