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Import of Empire 4.2.12

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Markus Armbruster 2003-08-23 12:23:04 +00:00
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src/lib/update/nav_util.c Normal file
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/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---
*
* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
* related information and legal notices. It is expected that any future
* projects/authors will amend these files as needed.
*
* ---
*
* nav_util.c: Utilities for autonav and sail
*
* Known contributors to this file:
*
*/
#include "misc.h"
#include <ctype.h>
#include "var.h"
#include "ship.h"
#include "plane.h"
#include "land.h"
#include "nuke.h"
#include "sect.h"
#include "news.h"
#include "xy.h"
#include "nsc.h"
#include "nat.h"
#include "path.h"
#include "deity.h"
#include "file.h"
#include "item.h"
#include "optlist.h"
#include "player.h"
#include "update.h"
#include "subs.h"
#include "common.h"
#include "gen.h"
/* Format a ship name */
int
check_nav(struct sctstr *sect)
{
extern struct dchrstr dchr[];
switch (dchr[sect->sct_type].d_flg & 03) {
case NAVOK:
break;
case NAV_02:
if (sect->sct_effic < 2)
return CN_CONSTRUCTION;
break;
case NAV_60:
if (sect->sct_effic < 60)
return CN_CONSTRUCTION;
break;
default:
return CN_LANDLOCKED;
}
return CN_NAVIGABLE;
}
/* load a specific ship given its
* location and what field to modify.
* new autonav code
* Chad Zabel 6/1/94
*/
int
load_it(register struct shpstr *sp, register struct sctstr *psect, int i)
{
int comm, shipown, amount, ship_amt, sect_amt,
abs_max, max_amt, transfer;
s_char item;
struct mchrstr *vship;
amount = sp->shp_lend[i];
shipown = sp->shp_own;
item = sp->shp_tend[i]; /* commodity */
comm = com_num(&item);
ship_amt = getvar(comm,(s_char *) sp , EF_SHIP);
sect_amt = getvar(comm,(s_char *) psect, EF_SECTOR);
/* check for disloyal civilians */
if (psect->sct_oldown != shipown && comm == V_CIVIL)
{ wu(0,shipown,"Ship #%d - unable to load disloyal civilians at %s.",
sp->shp_uid, xyas(psect->sct_x,psect->sct_y,psect->sct_own));
return 0;
}
if (comm == V_CIVIL || comm == V_MILIT)
sect_amt--; /* leave 1 civ or mil to hold the sector. */
vship = &mchr[(int)sp->shp_type];
abs_max = max_amt = (vl_find(comm,vship->m_vtype,
vship->m_vamt,(int) vship->m_nv));
if (!abs_max)
return 0; /* can't load the ship, skip to the end. */
max_amt = min (sect_amt, max_amt - ship_amt);
if (max_amt <= 0 && (ship_amt != abs_max)) {
sp->shp_autonav |= AN_LOADING;
return 0;
}
transfer = amount - ship_amt;
if (transfer > sect_amt) { /* not enough in the */
transfer = sect_amt; /* sector to fill the */
sp->shp_autonav |= AN_LOADING; /* ship, set load flag */
}
if (ship_amt + transfer > abs_max) /* Do not load more */
transfer = abs_max-ship_amt; /* then the max alowed */
/* on the ship. */
if (transfer == 0)
return 0; /* nothing to move */
putvar(comm, ship_amt + transfer, (s_char *)sp, EF_SHIP);
if (comm == V_CIVIL || comm == V_MILIT)
sect_amt++; /*adjustment*/
putvar(comm, sect_amt - transfer, (s_char *)psect, EF_SECTOR);
/* deal with the plague */
if (getvar(V_PSTAGE, (s_char *)psect, EF_SECTOR) == PLG_INFECT &&
getvar(V_PSTAGE, (s_char *)sp , EF_SHIP) == PLG_HEALTHY)
putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)sp, EF_SHIP);
if (getvar(V_PSTAGE, (s_char *)sp, EF_SHIP) == PLG_INFECT &&
getvar(V_PSTAGE, (s_char *)psect, EF_SECTOR) == PLG_HEALTHY)
putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)psect, EF_SECTOR);
return 1; /* we did someloading return 1 to keep */
/* our loop happy in nav_ship() */
}
/* unload_it
* A guess alot of this looks like load_it but because of its location
* in the autonav code I had to split the 2 procedures up.
* unload_it dumps all the goods from the ship to the harbor.
* ONLY goods in the trade fields will be unloaded.
* new autonav code
* Chad Zabel 6/1/94
*/
void
unload_it(register struct shpstr *sp)
{
struct sctstr *sectp;
s_char item;
int i;
int landowner;
int shipown;
int comm;
int sect_amt;
int ship_amt;
int abs_max = 99999; /* max amount a sector can hold. */
int max_amt;
int level;
sectp = getsectp(sp->shp_x,sp->shp_y);
landowner = sectp->sct_own;
shipown = sp->shp_own;
for(i=0;i<TMAX;++i) {
item = sp->shp_tend[i];
level = sp->shp_lend[i];
if (item == ' ' || level == 0)
continue;
if (landowner == 0 )
continue;
if (sectp->sct_type != SCT_HARBR)
continue;
comm = com_num(&item);
ship_amt = getvar(comm,(s_char *) sp ,EF_SHIP);
sect_amt = getvar(comm,(s_char *) sectp ,EF_SECTOR);
/* check for disloyal civilians */
if (sectp->sct_oldown != shipown && comm == V_CIVIL)
{
wu(0,sp->shp_own,"Ship #%d - unable to unload civilians into a disloyal sector at %s.",
sp->shp_uid, xyas(sectp->sct_x,sectp->sct_y,sectp->sct_own));
continue;
}
if (comm == V_CIVIL)
ship_amt--; /* This leaves 1 civs on board the ship */
if (sect_amt >= abs_max)
continue; /* The sector is full. */
max_amt = min (ship_amt,abs_max - sect_amt);
if (max_amt <= 0)
continue;
putvar(comm, ship_amt - max_amt, (s_char *) sp ,EF_SHIP);
putvar(comm, sect_amt + max_amt, (s_char *) sectp,EF_SECTOR);
if (getvar(V_PSTAGE, (s_char *)sectp,EF_SECTOR) == PLG_INFECT &&
getvar(V_PSTAGE, (s_char *)sp ,EF_SHIP ) == PLG_HEALTHY)
putvar(V_PSTAGE, PLG_EXPOSED,(s_char *)sp, EF_SHIP);
if (getvar(V_PSTAGE, (s_char *)sp ,EF_SHIP ) == PLG_INFECT &&
getvar(V_PSTAGE, (s_char *)sectp,EF_SECTOR) == PLG_HEALTHY)
putvar(V_PSTAGE, PLG_EXPOSED,(s_char *)sectp, EF_SECTOR);
}
}
/* com_num
* This small but useful bit of code runs through the list
* of commodities and return the integer value of the
* commodity it finds if possible. Very handy when using getvar().
* Basicly its a hacked version of whatitem.c found in the
* /player directory.
* new autonav code.
* Chad Zabel 6/1/94
*/
int
com_num(s_char *ptr)
{
struct ichrstr *ip;
for(ip = &ichr[1];ip->i_mnem != 0; ip++) {
if (*ptr == ip->i_mnem)
return ip->i_vtype;
}
return 0; /*NOTREACHED*/
}
/* auto_fuel_ship
* Assume a check for fuel=0 has already been made and passed.
* Try to fill a ship using petro. and then oil.
* new autonav code.
* This should be merged with the fuel command someday.
* Chad Zabel 6/1/94
*/
void
auto_fuel_ship(register struct shpstr *sp)
{
double d;
int totalfuel = 0;
int need;
int maxfuel;
int newfuel = 0;
int add_fuel = 0;
if (opt_FUEL == 0) return;
getship(sp->shp_uid,sp); /* refresh */
/* fill with petro */
maxfuel = mchr[(int)sp->shp_type].m_fuelc;
d = (double) maxfuel / 5.0;
if (( d-(int)d > 0.0 ))
d++;
need = (int)d;
newfuel = supply_commod(sp->shp_own,sp->shp_x,
sp->shp_y,I_PETROL,need);
add_fuel += newfuel * 5;
if (add_fuel > maxfuel)
add_fuel = maxfuel;
sp->shp_fuel += add_fuel;
totalfuel += add_fuel;
if (totalfuel == maxfuel) {
putship(sp->shp_uid,sp);
return; /* the ship is full */
}
add_fuel = 0;
/* fill with oil */
d = (double) (maxfuel - totalfuel) / 50.0;
if ((d-(int)d > 0.0))
d++;
need = (int)d;
newfuel = supply_commod(sp->shp_own,sp->shp_x,
sp->shp_y,I_OIL,need);
add_fuel = newfuel * 50;
if (add_fuel > maxfuel)
add_fuel = maxfuel;
sp->shp_fuel += add_fuel;
putship(sp->shp_uid,sp);
}