Import of Empire 4.2.12
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src/lib/commands/para.c
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src/lib/commands/para.c
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/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
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* related information and legal notices. It is expected that any future
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* projects/authors will amend these files as needed.
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*
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* ---
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*
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* para.c: Drop paratroopers onto a sector
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*
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* Known contributors to this file:
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* Dave Pare, 1986
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* Ken Stevens, 1995
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*/
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#include "misc.h"
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#include "player.h"
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#include "var.h"
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#include "sect.h"
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#include "ship.h"
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#include "item.h"
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#include "plane.h"
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#include "land.h"
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#include "nuke.h"
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#include "xy.h"
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#include "nsc.h"
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#include "news.h"
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#include "file.h"
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#include "nat.h"
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#include "path.h"
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#include "treaty.h"
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#include "mission.h"
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#include "combat.h"
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#include "commands.h"
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static int paradrop(struct emp_qelem *list, coord x, coord y);
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int
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para(void)
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{
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s_char *p;
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int mission_flags;
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int tech;
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coord tx, ty;
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coord ax, ay;
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int ap_to_target;
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s_char flightpath[MAX_PATH_LEN];
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struct nstr_item ni_bomb;
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struct nstr_item ni_esc;
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coord x, y;
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struct sctstr target;
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struct emp_qelem bomb_list;
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struct emp_qelem esc_list;
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int wantflags;
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struct sctstr ap_sect;
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s_char buf[1024];
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wantflags = P_P;
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if (!snxtitem(&ni_bomb, EF_PLANE, player->argp[1]))
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return RET_SYN;
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if (!snxtitem(&ni_esc, EF_PLANE, getstarg(player->argp[2], "escort(s)? ", buf)))
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pr("No escorts...\n");
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if ((p = getstarg(player->argp[3], "assembly point? ", buf)) == 0 || *p == 0)
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return RET_SYN;
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if (!sarg_xy(p, &x, &y) || !getsect(x, y, &ap_sect))
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return RET_SYN;
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if (ap_sect.sct_own && ap_sect.sct_own != player->cnum &&
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getrel(getnatp(ap_sect.sct_own), player->cnum) != ALLIED) {
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pr("Assembly point not owned by you or an ally!\n");
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return RET_SYN;
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}
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ax = x;
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ay = y;
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if (getpath(flightpath, player->argp[4], ax, ay, 0,
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0, 0, P_FLYING) == 0 || *flightpath == 0)
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return RET_SYN;
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tx = ax;
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ty = ay;
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(void) pathtoxy(flightpath, &tx, &ty, fcost);
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getsect(tx, ty, &target);
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pr("LZ is %s\n", xyas(tx, ty, player->cnum));
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ap_to_target = strlen(flightpath);
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if (*(flightpath+strlen(flightpath)-1) == 'h')
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ap_to_target--;
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pr("range to target is %d\n", ap_to_target);
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/*
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* select planes within range
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*/
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pln_sel(&ni_bomb, &bomb_list, &ap_sect, ap_to_target,
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2, P_C|wantflags, P_M|P_O);
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pln_sel(&ni_esc, &esc_list, &ap_sect, ap_to_target,
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2, P_ESC|P_F, P_M|P_O);
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/*
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* now arm and equip the bombers, transports, whatever.
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* tech is stored in high 16 bits of mission_flags.
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* yuck.
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*/
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tech=0;
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mission_flags = 0;
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mission_flags |= P_X; /* stealth (shhh) */
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mission_flags |= P_H; /* gets turned off if not all choppers */
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mission_flags = pln_arm(&bomb_list, 2*ap_to_target, 'a', &ichr[I_MILIT],
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0, mission_flags,&tech);
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if (QEMPTY(&bomb_list)) {
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pr("No planes could be equipped for the mission.\n");
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return RET_FAIL;
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}
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mission_flags = pln_arm(&esc_list, 2*ap_to_target, 'a', &ichr[I_MILIT],
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P_ESC|P_F, mission_flags,&tech);
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ac_encounter(&bomb_list,&esc_list,ax,ay,flightpath,mission_flags,0,0,0);
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if (QEMPTY(&bomb_list)) {
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pr("No planes got through fighter defenses\n");
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} else {
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getsect(tx, ty, &target);
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paradrop(&bomb_list, tx, ty);
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}
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pln_put(&bomb_list);
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pln_put(&esc_list);
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return RET_OK;
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}
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static int
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paradrop(struct emp_qelem *list, coord x, coord y)
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{
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struct combat off[1]; /* assaulting ship or sector */
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struct combat def[1]; /* defending ship */
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struct emp_qelem olist; /* assaulting units */
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struct emp_qelem dlist; /* defending units */
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int ototal; /* total assaulting strength */
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int a_engineer = 0; /* assaulter engineers are present */
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int a_spy = 0; /* the best assaulter scout */
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double osupport = 1.0; /* assault support */
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double dsupport = 1.0; /* defense support */
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struct plist *plp;
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struct emp_qelem *qp;
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/* Check for valid attack */
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att_combat_init(def, EF_SECTOR);
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def->x = x;
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def->y = y;
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if (att_abort(A_PARA, 0, def))
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return RET_FAIL;
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/* Show what we're air-assaulting, and check treaties */
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if (att_show(def))
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return RET_FAIL;
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/* set what we're air-assaulting with */
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emp_initque(&olist);
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att_combat_init(off, EF_PLANE);
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for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
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plp = (struct plist *) qp;
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if (plp->pcp->pl_flags & (P_V|P_C))
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off->troops += plp->misc;
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}
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off->mil = off->troops;
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if (att_abort(A_PARA, off, def)) {
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pr("Air-Assault aborted\n");
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return RET_OK;
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}
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/* Get ototal */
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ototal = att_estimate_defense(A_PARA, off, &olist, def, a_spy);
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if (att_abort(A_PARA, off, def)) {
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pr("Air-assault aborted\n");
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return RET_OK;
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}
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/* Get the defense */
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att_get_defense(&olist, def, &dlist, a_spy, ototal);
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/* Get defender support */
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att_get_support(A_PARA, 0, 0, 0, 0,
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&olist, off, &dlist, def, &osupport, &dsupport,
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a_engineer);
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if (att_abort(A_PARA, off, def)) {
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pr("Air-assault aborted\n");
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return RET_OK;
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}
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/*
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* Death, carnage, and destruction.
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*/
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att_fight(A_PARA,off,&olist,osupport,def,&dlist,dsupport);
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return RET_OK;
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}
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