2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2000, 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 the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
23 * related information and legal notices. It is expected that any future
24 * projects/authors will amend these files as needed.
28 * nav_util.c: Utilities for autonav and sail
30 * Known contributors to this file:
58 /* Format a ship name */
60 check_nav(struct sctstr *sect)
62 switch (dchr[sect->sct_type].d_flg & 03) {
67 if (sect->sct_effic < 2)
68 return CN_CONSTRUCTION;
71 if (sect->sct_effic < 60)
72 return CN_CONSTRUCTION;
80 /* load a specific ship given its
81 * location and what field to modify.
86 load_it(register struct shpstr *sp, register struct sctstr *psect, int i)
88 int comm, shipown, amount, ship_amt, sect_amt,
89 abs_max, max_amt, transfer;
91 struct mchrstr *vship;
93 amount = sp->shp_lend[i];
94 shipown = sp->shp_own;
95 item = sp->shp_tend[i]; /* commodity */
96 comm = com_num(&item);
98 ship_amt = getvar(comm, (s_char *)sp, EF_SHIP);
99 sect_amt = getvar(comm, (s_char *)psect, EF_SECTOR);
101 /* check for disloyal civilians */
102 if (psect->sct_oldown != shipown && comm == V_CIVIL) {
104 "Ship #%d - unable to load disloyal civilians at %s.",
105 sp->shp_uid, xyas(psect->sct_x, psect->sct_y, psect->sct_own));
108 if (comm == V_CIVIL || comm == V_MILIT)
109 sect_amt--; /* leave 1 civ or mil to hold the sector. */
110 vship = &mchr[(int)sp->shp_type];
111 abs_max = max_amt = (vl_find(comm, vship->m_vtype,
112 vship->m_vamt, (int)vship->m_nv));
115 return 0; /* can't load the ship, skip to the end. */
117 max_amt = min(sect_amt, max_amt - ship_amt);
118 if (max_amt <= 0 && (ship_amt != abs_max)) {
119 sp->shp_autonav |= AN_LOADING;
124 transfer = amount - ship_amt;
125 if (transfer > sect_amt) { /* not enough in the */
126 transfer = sect_amt; /* sector to fill the */
127 sp->shp_autonav |= AN_LOADING; /* ship, set load flag */
129 if (ship_amt + transfer > abs_max) /* Do not load more */
130 transfer = abs_max - ship_amt; /* then the max alowed */
134 return 0; /* nothing to move */
137 putvar(comm, ship_amt + transfer, (s_char *)sp, EF_SHIP);
138 if (comm == V_CIVIL || comm == V_MILIT)
139 sect_amt++; /*adjustment */
140 putvar(comm, sect_amt - transfer, (s_char *)psect, EF_SECTOR);
142 /* deal with the plague */
143 if (getvar(V_PSTAGE, (s_char *)psect, EF_SECTOR) == PLG_INFECT &&
144 getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_HEALTHY)
145 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)sp, EF_SHIP);
146 if (getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_INFECT &&
147 getvar(V_PSTAGE, (s_char *)psect, EF_SECTOR) == PLG_HEALTHY)
148 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)psect, EF_SECTOR);
150 return 1; /* we did someloading return 1 to keep */
151 /* our loop happy in nav_ship() */
156 * A guess alot of this looks like load_it but because of its location
157 * in the autonav code I had to split the 2 procedures up.
158 * unload_it dumps all the goods from the ship to the harbor.
159 * ONLY goods in the trade fields will be unloaded.
164 unload_it(register struct shpstr *sp)
166 struct sctstr *sectp;
174 int abs_max = 99999; /* max amount a sector can hold. */
179 sectp = getsectp(sp->shp_x, sp->shp_y);
181 landowner = sectp->sct_own;
182 shipown = sp->shp_own;
184 for (i = 0; i < TMAX; ++i) {
185 item = sp->shp_tend[i];
186 level = sp->shp_lend[i];
188 if (item == ' ' || level == 0)
192 if (sectp->sct_type != SCT_HARBR)
195 comm = com_num(&item);
196 ship_amt = getvar(comm, (s_char *)sp, EF_SHIP);
197 sect_amt = getvar(comm, (s_char *)sectp, EF_SECTOR);
199 /* check for disloyal civilians */
200 if (sectp->sct_oldown != shipown && comm == V_CIVIL) {
202 "Ship #%d - unable to unload civilians into a disloyal sector at %s.",
203 sp->shp_uid, xyas(sectp->sct_x, sectp->sct_y,
208 ship_amt--; /* This leaves 1 civs on board the ship */
210 if (sect_amt >= abs_max)
211 continue; /* The sector is full. */
213 max_amt = min(ship_amt, abs_max - sect_amt);
218 putvar(comm, ship_amt - max_amt, (s_char *)sp, EF_SHIP);
219 putvar(comm, sect_amt + max_amt, (s_char *)sectp, EF_SECTOR);
221 if (getvar(V_PSTAGE, (s_char *)sectp, EF_SECTOR) == PLG_INFECT &&
222 getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_HEALTHY)
223 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)sp, EF_SHIP);
225 if (getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_INFECT &&
226 getvar(V_PSTAGE, (s_char *)sectp, EF_SECTOR) == PLG_HEALTHY)
227 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)sectp, EF_SECTOR);
234 * This small but useful bit of code runs through the list
235 * of commodities and return the integer value of the
236 * commodity it finds if possible. Very handy when using getvar().
237 * Basicly its a hacked version of whatitem.c found in the
248 for (ip = &ichr[1]; ip->i_mnem != 0; ip++) {
249 if (*ptr == ip->i_mnem)
252 return 0; /*NOTREACHED*/
258 * Assume a check for fuel=0 has already been made and passed.
259 * Try to fill a ship using petro. and then oil.
261 * This should be merged with the fuel command someday.
266 auto_fuel_ship(register struct shpstr *sp)
277 getship(sp->shp_uid, sp); /* refresh */
278 /* fill with petro */
279 maxfuel = mchr[(int)sp->shp_type].m_fuelc;
280 d = (double)maxfuel / 5.0;
281 if ((d - (int)d > 0.0))
285 newfuel = supply_commod(sp->shp_own, sp->shp_x,
286 sp->shp_y, I_PETROL, need);
287 add_fuel += newfuel * 5;
288 if (add_fuel > maxfuel)
290 sp->shp_fuel += add_fuel;
291 totalfuel += add_fuel;
293 if (totalfuel == maxfuel) {
294 putship(sp->shp_uid, sp);
295 return; /* the ship is full */
299 d = (double)(maxfuel - totalfuel) / 50.0;
300 if ((d - (int)d > 0.0))
304 newfuel = supply_commod(sp->shp_own, sp->shp_x,
305 sp->shp_y, I_OIL, need);
306 add_fuel = newfuel * 50;
307 if (add_fuel > maxfuel)
309 sp->shp_fuel += add_fuel;
310 putship(sp->shp_uid, sp);