2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2021, 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 * deliver.c: Deliver commodities to neighboring sector
29 * Known contributors to this file:
30 * Markus Armbruster, 2004-2016
40 #include "prototypes.h"
43 #define DELIVER_BONUS 4.0
46 deliver(struct sctstr *from, struct ichrstr *ip, int dir,
47 int thresh, int amt_src, int plague, enum i_packing packing)
50 i_type vtype; /* item vartype */
57 if (dir <= 0 || dir > DIR_UL)
61 if ((amt_moved = amt_src - thresh) <= 0)
64 * make sure delivery looks OK. Check where its going,
65 * where its coming from, and see if there is more than
66 * the threshold amount
68 if (!military_control(from))
70 to = getsectp(from->sct_x + diroff[dir][0],
71 from->sct_y + diroff[dir][1]);
72 if (to->sct_own != from->sct_own) {
73 wu(0, from->sct_own, "%s delivery walkout at %s\n",
74 ip->i_name, ownxy(from));
78 mobility = from->sct_mobil / 2;
79 if (vtype == I_CIVIL) {
80 if (from->sct_own != from->sct_oldown) {
82 "The conquered populace in %s refuses to relocate!\n",
86 if (to->sct_own != to->sct_oldown) {
88 "Citizens in %s refuse to relocate!\n", ownxy(from));
92 /* make sure not to abandon the sector */
93 if (vtype == I_CIVIL || (vtype == I_MILIT && !to->sct_item[I_CIVIL]))
96 * disallow delivery into prohibited sectors.
97 * calculate unit movement cost; decrease amount if
98 * there isn't enough mobility.
100 mcost = sector_mcost(to, MOB_MOVE) * ip->i_lbs / ip->i_pkg[packing];
101 mcost /= DELIVER_BONUS;
103 if (mobility < mcost * amt_moved) {
104 /* XXX can mcost be == 0? */
105 amt_moved = (int)(mobility / mcost);
109 amt_dst = to->sct_item[vtype];
110 if (amt_moved > ITEM_MAX - amt_dst) {
111 /* delivery backlog */
112 amt_moved = ITEM_MAX - amt_dst;
114 to->sct_item[vtype] = amt_moved + amt_dst;
115 /* deliver the plague too! */
116 if (plague == PLG_INFECT && to->sct_pstage == PLG_HEALTHY)
117 to->sct_pstage = PLG_EXPOSED;
118 n = from->sct_mobil - (int)(mcost * amt_moved);
126 dodeliver(struct sctstr *sp)
132 enum i_packing packing;
135 if (sp->sct_mobil <= 0)
137 plague = sp->sct_pstage;
138 packing = sp->sct_effic >= 60 ? dchr[sp->sct_type].d_pkg : IPKG;
139 for (i = I_NONE + 1; i <= I_MAX; i++) {
140 if (sp->sct_del[i] == 0)
142 thresh = sp->sct_del[i] & ~0x7;
143 dir = sp->sct_del[i] & 0x7;
144 n = deliver(sp, &ichr[i], dir, thresh, sp->sct_item[i],
147 sp->sct_item[i] -= n;
148 if (sp->sct_mobil <= 0)