git.pond.sub.org Git - empserver/blob - src/lib/commands/boar.c

   1 /*
   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
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  *
  20  *  ---
  21  *
  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.
  25  *
  26  *  ---
  27  *
  28  *  boar.c: Board an enemy ship
  29  *
  30  *  Known contributors to this file:
  31  *     Ken Stevens, 1995
  32  */
  33
  34 #include <math.h>
  35 #include "misc.h"
  36 #include "player.h"
  37 #include "file.h"
  38 #include "var.h"
  39 #include "sect.h"
  40 #include "path.h"
  41 #include "news.h"
  42 #include "treaty.h"
  43 #include "nat.h"
  44 #include "xy.h"
  45 #include "land.h"
  46 #include "nsc.h"
  47 #include "mission.h"
  48 #include "ship.h"
  49 #include "combat.h"
  50 #include "retreat.h"
  51 #include "commands.h"
  52
  53 int
  54 boar(void)
  55 {
  56         struct  combat off[1];  /* boarding ship or sector */
  57         struct  combat def[1];  /* defending ship */
  58         struct  emp_qelem olist;        /* boarding units */
  59         struct  emp_qelem dlist;        /* defending units */
  60         int     ototal;         /* total boarding strength */
  61         int     a_engineer = 0; /* boarder engineers are present */
  62         int     a_spy = 0;      /* the best boarder scout */
  63         struct  shpstr  ship;   /* for retreating */
  64         struct  sctstr  sect;
  65         struct  lndstr  land;
  66         struct  nstr_item ni;
  67         int     foundland;
  68         s_char  *p;
  69         s_char  buf[1024];
  70
  71         att_combat_init(def, EF_SHIP);
  72         /*
  73          * Collect input from the boarder
  74          */
  75
  76         /* What are we boarding? */
  77
  78         if (!(p = getstarg(player->argp[1], "Victim ship #?  ", buf)) ||
  79             (def->shp_uid = atoi(p)) < 0)
  80                 return RET_SYN;
  81
  82         /*
  83          * Ask the boarder what he wants to board with
  84          */
  85
  86         if (!(p = getstarg(player->argp[2], "Boarding party from? ", buf)))
  87                 return RET_SYN;
  88         if (issector(p)) {
  89                 att_combat_init(off, EF_SECTOR);
  90                 if (!sarg_xy(p, &off->x, &off->y))
  91                         return RET_SYN;
  92                 getsect(off->x, off->y, &sect);
  93                 if (sect.sct_own != player->cnum) {
  94                     pr("You don't own %s!\n",
  95                        xyas(off->x, off->y, player->cnum));
  96                     return RET_SYN;
  97                 }
  98                 if (sect.sct_mobil <= 0) {
  99                     /* Look for land units with mobility */
 100                     snxtitem_xy(&ni, EF_LAND, off->x, off->y);
 101                     foundland = 0;
 102                     while (nxtitem(&ni, (s_char *)&land)) {
 103                         if (land.lnd_own != player->cnum)
 104                             continue;
 105                         if (land.lnd_ship >= 0)
 106                             continue;
 107                         if (land.lnd_mobil <= 0)
 108                             continue;
 109                         /* Only land units with assault can board */
 110                         if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT))
 111                             continue;
 112                         foundland = 1;
 113                     }
 114                     if (!foundland) {
 115                         pr("You don't have any mobility (sector or land units) in %s!\n",
 116                            xyas(off->x, off->y, player->cnum));
 117                         return RET_SYN;
 118                     }
 119                 }
 120         } else {
 121                 att_combat_init(off, EF_SHIP);
 122                 if ((off->shp_uid = atoi(p)) < 0)
 123                         return RET_SYN;
 124         }
 125         if (att_abort(A_BOARD, off, def)) {
 126                 pr("Board aborted\n");
 127                 return RET_OK;
 128         }
 129
 130         /* Fire at the attacking ship */
 131
 132         att_approach(off, def);
 133         if (att_abort(A_BOARD, off, def)) {
 134                 pr("Board aborted\n");
 135                 att_empty_attack(A_BOARD, 0, def);
 136                 return RET_OK;
 137         }
 138
 139         /* Show what we're boarding, and check treaties */
 140
 141         if (att_show(def))
 142             return RET_FAIL;
 143
 144         /* Ask the player what he wants to board with */
 145
 146         att_ask_offense(A_BOARD, off, def, &olist, &a_spy, &a_engineer);
 147         if (att_abort(A_BOARD, off, def)) {
 148                 pr("Board aborted\n");
 149                 att_empty_attack(A_BOARD, 0, def);
 150                 return att_free_lists(&olist, 0);
 151         }
 152
 153         /*
 154          * Estimate the defense strength and give the player a chance to abort
 155          */
 156
 157         ototal = att_estimate_defense(A_BOARD, off, &olist, def, a_spy);
 158         if (att_abort(A_BOARD, off, def)) {
 159                 pr("Board aborted\n");
 160                 att_empty_attack(A_BOARD, 0, def);
 161                 return att_free_lists(&olist, 0);
 162         }
 163
 164         /*
 165          * We have now got all the answers from the boarder.  From this point
 166          * forward, we can assume that this battle is the _only_ thing
 167          * happening in the game.
 168          */
 169
 170         /* Get the real defense */
 171
 172         att_get_defense(&olist, def, &dlist, a_spy, ototal);
 173
 174         /*
 175          * Death, carnage, and destruction.
 176          */
 177
 178         if (!(att_fight(A_BOARD,off,&olist,1.0,def,&dlist,1.0))) {
 179                 getship(def->shp_uid, &ship);
 180                 if (ship.shp_rflags & RET_BOARDED) {
 181                         retreat_ship(&ship, 'u');
 182                         putship(def->shp_uid, &ship);
 183                 }
 184         }
 185
 186         return RET_OK;
 187 }