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empserver/src/lib/subs/retreat.c
Markus Armbruster f38868d00e (retreat_ship1, retreat_land1): Used to accept DIR_VIEW, which 
happened do do nothing.  Ignoring it like other invalid directions is
clearer.
2005-09-25 10:05:09 +00:00

559 lines
14 KiB
C
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/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2005, 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.
*
* ---
*
* retreat.c: Retreat subroutines
*
* Known contributors to this file:
* Steve McClure, 2000
*
*/
#include <string.h>
#include "misc.h"
#include "player.h"
#include "nat.h"
#include "retreat.h"
#include "ship.h"
#include "land.h"
#include "sect.h"
#include "news.h"
#include "xy.h"
#include "nsc.h"
#include "path.h"
#include "file.h"
#include "damage.h"
#include "prototypes.h"
#include "optlist.h"
static int findcondition(s_char);
static int retreat_land1(struct lndstr *, s_char, int);
static int retreat_ship1(struct shpstr *, s_char, int);
struct ccode {
s_char code;
s_char *desc[2];
} conditions[] = {
{
'i', {
"retreated with a damaged friend", "was damaged",},}, {
't', {
"retreated with a torpedoed ship", "was hit by a torpedo",},}, {
's', {
"retreated with a ship scared by sonar",
"detected a sonar ping",},}, {
'h', {
"retreated with a helpless ship",
"was fired upon with no one able to defend it",},}, {
'b', {
"retreated with a bombed friend", "was bombed",},}, {
'd', {
"retreated with a depth-charged ship", "was depth-charged",},}, {
'u', {
"retreated with a boarded ship", "was boarded",},}, {
0, {
"", ""}},};
int
check_retreat_and_do_shipdamage(struct shpstr *sp, int dam)
{
if (dam <= 0)
return 0;
shipdamage(sp, dam);
if (sp->shp_rflags & RET_INJURED)
retreat_ship(sp, 'i');
return 1;
}
void
retreat_ship(struct shpstr *sp, s_char code)
{
struct nstr_item ni;
struct shpstr ship;
s_char buf[2];
if (sp->shp_rflags & RET_GROUP) {
buf[0] = sp->shp_fleet;
buf[1] = 0;
snxtitem(&ni, EF_SHIP, buf);
while (nxtitem(&ni, &ship))
if ((ship.shp_fleet == buf[0]) &&
(ship.shp_own == sp->shp_own)) {
if (ship.shp_uid == sp->shp_uid) {
retreat_ship1(sp, code, 1);
if (sp->shp_rpath[0] == 0)
sp->shp_rflags = 0;
} else {
retreat_ship1(&ship, code, 0);
getship(ship.shp_uid, &ship);
if (ship.shp_rpath[0] == 0) {
ship.shp_rflags = 0;
putship(ship.shp_uid, &ship);
}
}
}
} else {
retreat_ship1(sp, code, 1);
if (sp->shp_rpath[0] == 0)
sp->shp_rflags = 0;
}
}
static int
retreat_ship1(struct shpstr *sp, s_char code, int orig)
/* Is this the originally scared ship, or a follower */
{
struct sctstr sect;
int n;
int m;
int max;
int dir;
coord newx;
coord newy;
coord dx;
coord dy;
int stopping;
int mines;
int shells;
double mobcost;
struct mchrstr *mcp;
int time_to_stop;
int changed;
sp->shp_mission = 0;
if (sp->shp_own == 0)
return 0;
if (isupper(code))
code = tolower(code);
n = 0;
if (sp->shp_effic < SHIP_MINEFF) {
wu(0, sp->shp_own,
"%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
prship(sp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putship(sp->shp_uid, sp);
return 0;
}
if (opt_SAIL) {
/* can't retreat a ship that's sailin, bad things happend */
if (*sp->shp_path) {
wu(0, sp->shp_own,
"%s %s,\nbut had sailing orders, and couldn't retreat!\n",
prship(sp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putship(sp->shp_uid, sp);
return 0;
}
}
/* check crew - uws don't count */
if (sp->shp_item[I_MILIT] == 0 && sp->shp_item[I_CIVIL] == 0) {
wu(0, sp->shp_own,
"%s %s,\nbut had no crew, and couldn't retreat!\n", prship(sp),
conditions[findcondition(code)].desc[orig]);
if (!orig)
putship(sp->shp_uid, sp);
return 0;
}
getsect(sp->shp_x, sp->shp_y, &sect);
switch (check_nav(&sect)) {
case CN_CONSTRUCTION:
wu(0, sp->shp_own,
"%s %s,\nbut was caught in a construction zone, and couldn't retreat!\n",
prship(sp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putship(sp->shp_uid, sp);
return 0;
case CN_LANDLOCKED:
wu(0, sp->shp_own,
"%s %s,\nbut was landlocked, and couldn't retreat!\n",
prship(sp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putship(sp->shp_uid, sp);
return 0;
/*NOTREACHED*/
case CN_NAVIGABLE:
break;
case CN_ERROR:
default:
wu(0, sp->shp_own,
"%s %s,\nbut was subject to an empire error, and couldn't retreat!\n",
prship(sp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putship(sp->shp_uid, sp);
return 0;
/*NOTREACHED*/
}
if (sp->shp_mobil <= 0.0) {
wu(0, sp->shp_own,
"%s %s,\nbut had no mobility, and couldn't retreat!\n",
prship(sp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putship(sp->shp_uid, sp);
return 0;
}
n = (-1 * MAX_RETREAT);
stopping = 0;
time_to_stop = 0;
while ((!stopping) && n) {
dx = dy = 0;
if (sp->shp_rpath[0] == 0 || sp->shp_rpath[0] == 0) {
stopping = 1;
continue;
}
if (sp->shp_mobil <= 0.0) {
wu(0, sp->shp_own,
"%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
prship(sp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putship(sp->shp_uid, sp);
return 0;
}
dir = chkdir(sp->shp_rpath[0], DIR_STOP, DIR_LAST);
memmove(sp->shp_rpath, sp->shp_rpath+1, sizeof(sp->shp_rpath) - 1);
if (dir < 0)
continue;
if (dir == DIR_STOP)
stopping++;
else {
dx = diroff[dir][0];
dy = diroff[dir][1];
}
n++;
mcp = &mchr[(int)sp->shp_type];
newx = xnorm(sp->shp_x + dx);
newy = ynorm(sp->shp_y + dy);
mobcost = sp->shp_effic * 0.01 * sp->shp_speed;
mobcost = 480.0 / (mobcost + techfact(sp->shp_tech, mobcost));
getsect(newx, newy, &sect);
if (check_nav(&sect) != CN_NAVIGABLE ||
(sect.sct_own && !player->owner &&
getrel(getnatp(sect.sct_own), sp->shp_own) < FRIENDLY)) {
wu(0, sp->shp_own, "%s %s,\nbut could not retreat to %s!\n",
prship(sp), conditions[findcondition(code)].desc[orig],
xyas(newx, newy, sp->shp_own));
if (!orig)
putship(sp->shp_uid, sp);
return 0;
}
sp->shp_x = newx;
sp->shp_y = newy;
sp->shp_mobil -= mobcost;
if (stopping)
continue;
mines = sect.sct_mines;
changed = 0;
if ((mcp->m_flags & M_SWEEP) && mines > 0 && !player->owner) {
max = mcp->m_item[I_SHELL];
shells = sp->shp_item[I_SHELL];
for (m = 0; mines > 0 && m < 5; m++) {
if (chance(0.66)) {
mines--;
shells = min(max, shells + 1);
changed |= map_set(sp->shp_own, sp->shp_x, sp->shp_y,
'X', 0);
}
}
if (sect.sct_mines != mines) {
wu(0, sp->shp_own,
"%s cleared %d mine%s in %s while retreating\n",
prship(sp), sect.sct_mines-mines, splur(sect.sct_mines-mines),
xyas(newx, newy, sp->shp_own));
}
sect.sct_mines = mines;
sect.sct_item[I_SHELL] = shells;
putsect(&sect);
if (changed)
writemap(sp->shp_own);
}
if (mines > 0 && !player->owner && chance(DMINE_HITCHANCE(mines))) {
wu(0, sp->shp_own,
"%s %s,\nand hit a mine in %s while retreating!\n",
prship(sp), conditions[findcondition(code)].desc[orig],
xyas(newx, newy, sp->shp_own));
nreport(sp->shp_own, N_HIT_MINE, 0, 1);
m = MINE_DAMAGE();
shipdamage(sp, m);
mines--;
if (map_set(sp->shp_own, sp->shp_x, sp->shp_y, 'X', 0))
writemap(sp->shp_own);
sect.sct_mines = mines;
putsect(&sect);
if (sp->shp_effic < SHIP_MINEFF)
time_to_stop = 1;
if (!orig)
putship(sp->shp_uid, sp);
return 0;
}
if (time_to_stop)
stopping = 1;
}
if (orig) {
wu(0, sp->shp_own, "%s %s, and retreated to %s\n", prship(sp),
conditions[findcondition(code)].desc[orig],
xyas(sp->shp_x, sp->shp_y, sp->shp_own));
} else {
wu(0, sp->shp_own, "%s %s, and ended up at %s\n",
prship(sp),
conditions[findcondition(code)].desc[orig],
xyas(sp->shp_x, sp->shp_y, sp->shp_own));
}
if (!orig)
putship(sp->shp_uid, sp);
return 1;
}
static int
findcondition(s_char code)
{
int x;
x = 0;
while (conditions[x].code) {
if (conditions[x].code == code)
return x;
x++;
}
return x;
}
int
check_retreat_and_do_landdamage(struct lndstr *lp, int dam)
{
if (dam <= 0)
return 0;
landdamage(lp, dam);
if (lp->lnd_rflags & RET_INJURED)
retreat_land(lp, 'i');
return 1;
}
void
retreat_land(struct lndstr *lp, s_char code)
{
struct nstr_item ni;
struct lndstr land;
s_char buf[2];
if (lp->lnd_rflags & RET_GROUP) {
buf[0] = lp->lnd_army;
buf[1] = 0;
snxtitem(&ni, EF_SHIP, buf);
while (nxtitem(&ni, &land))
if ((land.lnd_army == buf[0]) && (land.lnd_own == lp->lnd_own)) {
if (land.lnd_uid == lp->lnd_uid) {
retreat_land1(lp, code, 1);
if (lp->lnd_rpath[0] == 0)
lp->lnd_rflags = 0;
} else {
retreat_land1(&land, code, 0);
getland(land.lnd_uid, &land);
if (land.lnd_rpath[0] == 0) {
land.lnd_rflags = 0;
putland(land.lnd_uid, &land);
}
}
}
} else {
retreat_land1(lp, code, 1);
if (lp->lnd_rpath[0] == 0)
lp->lnd_rflags = 0;
}
}
static int
retreat_land1(struct lndstr *lp, s_char code, int orig)
/* Is this the originally scared unit, or a follower */
{
struct sctstr sect;
int n;
int m;
int max;
int dir;
coord newx;
coord newy;
coord dx;
coord dy;
int stopping;
int mines;
int shells;
double mobcost;
struct lchrstr *lcp;
int time_to_stop;
lp->lnd_mission = 0;
if (lp->lnd_own == 0)
return 0;
if (isupper(code))
code = tolower(code);
n = 0;
if (lp->lnd_effic < LAND_MINEFF) {
wu(0, lp->lnd_own,
"%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
prland(lp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putland(lp->lnd_uid, lp);
return 0;
}
getsect(lp->lnd_x, lp->lnd_y, &sect);
if (lp->lnd_mobil <= 0.0) {
wu(0, lp->lnd_own,
"%s %s,\nbut had no mobility, and couldn't retreat!\n",
prland(lp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putland(lp->lnd_uid, lp);
return 0;
}
n = (-1 * MAX_RETREAT);
stopping = 0;
time_to_stop = 0;
while ((!stopping) && n) {
dx = dy = 0;
if (lp->lnd_rpath[0] == 0 || lp->lnd_rpath[0] == 0) {
stopping = 1;
continue;
}
if (lp->lnd_mobil <= 0.0) {
wu(0, lp->lnd_own,
"%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
prland(lp), conditions[findcondition(code)].desc[orig]);
if (!orig)
putland(lp->lnd_uid, lp);
return 0;
}
dir = chkdir(lp->lnd_rpath[0], DIR_STOP, DIR_LAST);
memmove(lp->lnd_rpath, lp->lnd_rpath+1, sizeof(lp->lnd_rpath) - 1);
if (dir < 0)
continue;
if (dir == DIR_STOP)
stopping++;
else {
dx = diroff[dir][0];
dy = diroff[dir][1];
}
n++;
lcp = &lchr[(int)lp->lnd_type];
newx = xnorm(lp->lnd_x + dx);
newy = ynorm(lp->lnd_y + dy);
getsect(newx, newy, &sect);
if ((sect.sct_type == SCT_WATER) ||
(sect.sct_type == SCT_MOUNT) ||
(sect.sct_type == SCT_SANCT) ||
(sect.sct_type == SCT_WASTE) ||
(sect.sct_own != lp->lnd_own)) {
wu(0, lp->lnd_own, "%s %s,\nbut could not retreat to %s!\n",
prland(lp),
conditions[findcondition(code)].desc[orig],
xyas(newx, newy, lp->lnd_own));
if (!orig)
putland(lp->lnd_uid, lp);
return 0;
}
mobcost = lnd_mobcost(lp, &sect, MOB_ROAD);
lp->lnd_x = newx;
lp->lnd_y = newy;
lp->lnd_mobil -= mobcost;
if (stopping)
continue;
mines = sect.sct_mines;
if ((lcp->l_flags & L_ENGINEER) && mines > 0 &&
(sect.sct_oldown != lp->lnd_own)) {
max = lcp->l_item[I_SHELL];
shells = lp->lnd_item[I_SHELL];
for (m = 0; mines > 0 && m < 5; m++) {
if (chance(0.66)) {
mines--;
shells = min(max, shells + 1);
}
}
sect.sct_mines = mines;
lp->lnd_item[I_SHELL] = shells;
putsect(&sect);
}
if (mines > 0 && (sect.sct_oldown != lp->lnd_own) &&
chance(DMINE_HITCHANCE(mines))) {
wu(0, lp->lnd_own,
"%s %s,\nand hit a mine in %s while retreating!\n",
prland(lp),
conditions[findcondition(code)].desc[orig],
xyas(newx, newy, lp->lnd_own));
nreport(lp->lnd_own, N_LHIT_MINE, 0, 1);
m = MINE_LDAMAGE();
landdamage(lp, m);
mines--;
sect.sct_mines = mines;
putsect(&sect);
if (lp->lnd_effic < LAND_MINEFF)
time_to_stop = 1;
if (!orig)
putland(lp->lnd_uid, lp);
return 0;
}
if (time_to_stop)
stopping = 1;
}
if (orig) {
wu(0, lp->lnd_own, "%s %s, and retreated to %s\n",
prland(lp),
conditions[findcondition(code)].desc[orig],
xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
} else {
wu(0, lp->lnd_own, "%s %s, and ended up at %s\n",
prland(lp),
conditions[findcondition(code)].desc[orig],
xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
}
if (!orig)
putland(lp->lnd_uid, lp);
return 1;
}
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