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 extern struct dchrstr dchr[];
64 switch (dchr[sect->sct_type].d_flg & 03) {
69 if (sect->sct_effic < 2)
70 return CN_CONSTRUCTION;
73 if (sect->sct_effic < 60)
74 return CN_CONSTRUCTION;
82 /* load a specific ship given its
83 * location and what field to modify.
88 load_it(register struct shpstr *sp, register struct sctstr *psect, int i)
90 int comm, shipown, amount, ship_amt, sect_amt,
91 abs_max, max_amt, transfer;
93 struct mchrstr *vship;
95 amount = sp->shp_lend[i];
96 shipown = sp->shp_own;
97 item = sp->shp_tend[i]; /* commodity */
98 comm = com_num(&item);
100 ship_amt = getvar(comm, (s_char *)sp, EF_SHIP);
101 sect_amt = getvar(comm, (s_char *)psect, EF_SECTOR);
103 /* check for disloyal civilians */
104 if (psect->sct_oldown != shipown && comm == V_CIVIL) {
106 "Ship #%d - unable to load disloyal civilians at %s.",
107 sp->shp_uid, xyas(psect->sct_x, psect->sct_y, psect->sct_own));
110 if (comm == V_CIVIL || comm == V_MILIT)
111 sect_amt--; /* leave 1 civ or mil to hold the sector. */
112 vship = &mchr[(int)sp->shp_type];
113 abs_max = max_amt = (vl_find(comm, vship->m_vtype,
114 vship->m_vamt, (int)vship->m_nv));
117 return 0; /* can't load the ship, skip to the end. */
119 max_amt = min(sect_amt, max_amt - ship_amt);
120 if (max_amt <= 0 && (ship_amt != abs_max)) {
121 sp->shp_autonav |= AN_LOADING;
126 transfer = amount - ship_amt;
127 if (transfer > sect_amt) { /* not enough in the */
128 transfer = sect_amt; /* sector to fill the */
129 sp->shp_autonav |= AN_LOADING; /* ship, set load flag */
131 if (ship_amt + transfer > abs_max) /* Do not load more */
132 transfer = abs_max - ship_amt; /* then the max alowed */
136 return 0; /* nothing to move */
139 putvar(comm, ship_amt + transfer, (s_char *)sp, EF_SHIP);
140 if (comm == V_CIVIL || comm == V_MILIT)
141 sect_amt++; /*adjustment */
142 putvar(comm, sect_amt - transfer, (s_char *)psect, EF_SECTOR);
144 /* deal with the plague */
145 if (getvar(V_PSTAGE, (s_char *)psect, EF_SECTOR) == PLG_INFECT &&
146 getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_HEALTHY)
147 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)sp, EF_SHIP);
148 if (getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_INFECT &&
149 getvar(V_PSTAGE, (s_char *)psect, EF_SECTOR) == PLG_HEALTHY)
150 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)psect, EF_SECTOR);
152 return 1; /* we did someloading return 1 to keep */
153 /* our loop happy in nav_ship() */
158 * A guess alot of this looks like load_it but because of its location
159 * in the autonav code I had to split the 2 procedures up.
160 * unload_it dumps all the goods from the ship to the harbor.
161 * ONLY goods in the trade fields will be unloaded.
166 unload_it(register struct shpstr *sp)
168 struct sctstr *sectp;
176 int abs_max = 99999; /* max amount a sector can hold. */
181 sectp = getsectp(sp->shp_x, sp->shp_y);
183 landowner = sectp->sct_own;
184 shipown = sp->shp_own;
186 for (i = 0; i < TMAX; ++i) {
187 item = sp->shp_tend[i];
188 level = sp->shp_lend[i];
190 if (item == ' ' || level == 0)
194 if (sectp->sct_type != SCT_HARBR)
197 comm = com_num(&item);
198 ship_amt = getvar(comm, (s_char *)sp, EF_SHIP);
199 sect_amt = getvar(comm, (s_char *)sectp, EF_SECTOR);
201 /* check for disloyal civilians */
202 if (sectp->sct_oldown != shipown && comm == V_CIVIL) {
204 "Ship #%d - unable to unload civilians into a disloyal sector at %s.",
205 sp->shp_uid, xyas(sectp->sct_x, sectp->sct_y,
210 ship_amt--; /* This leaves 1 civs on board the ship */
212 if (sect_amt >= abs_max)
213 continue; /* The sector is full. */
215 max_amt = min(ship_amt, abs_max - sect_amt);
220 putvar(comm, ship_amt - max_amt, (s_char *)sp, EF_SHIP);
221 putvar(comm, sect_amt + max_amt, (s_char *)sectp, EF_SECTOR);
223 if (getvar(V_PSTAGE, (s_char *)sectp, EF_SECTOR) == PLG_INFECT &&
224 getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_HEALTHY)
225 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)sp, EF_SHIP);
227 if (getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_INFECT &&
228 getvar(V_PSTAGE, (s_char *)sectp, EF_SECTOR) == PLG_HEALTHY)
229 putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)sectp, EF_SECTOR);
236 * This small but useful bit of code runs through the list
237 * of commodities and return the integer value of the
238 * commodity it finds if possible. Very handy when using getvar().
239 * Basicly its a hacked version of whatitem.c found in the
250 for (ip = &ichr[1]; ip->i_mnem != 0; ip++) {
251 if (*ptr == ip->i_mnem)
254 return 0; /*NOTREACHED*/
260 * Assume a check for fuel=0 has already been made and passed.
261 * Try to fill a ship using petro. and then oil.
263 * This should be merged with the fuel command someday.
268 auto_fuel_ship(register struct shpstr *sp)
279 getship(sp->shp_uid, sp); /* refresh */
280 /* fill with petro */
281 maxfuel = mchr[(int)sp->shp_type].m_fuelc;
282 d = (double)maxfuel / 5.0;
283 if ((d - (int)d > 0.0))
287 newfuel = supply_commod(sp->shp_own, sp->shp_x,
288 sp->shp_y, I_PETROL, need);
289 add_fuel += newfuel * 5;
290 if (add_fuel > maxfuel)
292 sp->shp_fuel += add_fuel;
293 totalfuel += add_fuel;
295 if (totalfuel == maxfuel) {
296 putship(sp->shp_uid, sp);
297 return; /* the ship is full */
301 d = (double)(maxfuel - totalfuel) / 50.0;
302 if ((d - (int)d > 0.0))
306 newfuel = supply_commod(sp->shp_own, sp->shp_x,
307 sp->shp_y, I_OIL, need);
308 add_fuel = newfuel * 50;
309 if (add_fuel > maxfuel)
311 sp->shp_fuel += add_fuel;
312 putship(sp->shp_uid, sp);