src/lib/commands/arm.c

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/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2007, 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 files README, COPYING and CREDITS in the root of the source
 *  tree for related information and legal notices.  It is expected
 *  that future projects/authors will amend these files as needed.
 *
 *  ---
 *
 *  arm.c: Arm planes (missiles) with nuclear devices
 * 
 *  Known contributors to this file:
 *     Dave Pare, 1986
 *     Ken Stevens, 1995
 *     Steve McClure, 2000
 *     Markus Armbruster, 2006
 */

#include <config.h>

#include <stdio.h>
#include "commands.h"
#include "nuke.h"
#include "optlist.h"
#include "plane.h"

int
arm(void)
{
    struct nchrstr *ncp;
    struct plchrstr *plc;
    struct plnstr pl;
    struct nukstr nuke;
    char *p;
    int nukno;
    struct nstr_item ni;
    char buf[1024];
    char prompt[128];

    if (!snxtitem(&ni, EF_PLANE, player->argp[1]))
        return RET_SYN;
    while (nxtitem(&ni, &pl)) {
        if (!player->owner
            && getrel(getnatp(pl.pln_own), player->cnum) != ALLIED)
            continue;
        plc = &plchr[(int)pl.pln_type];
        if ((plc->pl_flags & (P_O | P_M)) == (P_O | P_M)) {
            pr("A %s cannot carry nuclear devices!\n", plc->pl_name);
            return RET_FAIL;
        }
        if (opt_MARKET) {
            if (ontradingblock(EF_PLANE, &pl)) {
                pr("You cannot arm %s while it is on the trading block!\n",
                   prplane(&pl));
                return RET_FAIL;
            }
        }
        if (pl.pln_nuketype < 0) {
            sprintf(prompt, "Nuclear device for %s: ", prplane(&pl));
            p = getstarg(player->argp[2], prompt, buf);
            if (!p || !*p)
                return RET_SYN;
            if (!check_plane_ok(&pl))
                return RET_FAIL;
            nukno = atoi(p);
            if (!getnuke(nukno, &nuke) || !player->owner)
                return RET_FAIL;
        } else {
            if (nuk_on_plane(&nuke, pl.pln_uid) < 0) {
                CANT_REACH();
                continue;
            }
        }
        ncp = &nchr[nuke.nuk_type];
        if (pl.pln_load < ncp->n_weight) {
            pr("A %s cannot carry %s devices!\n",
               plc->pl_name, ncp->n_name);
            return RET_FAIL;
        }
        p = getstarg(player->argp[3], "Airburst [n]? ", buf);

        if (!check_plane_ok(&pl) || !check_nuke_ok(&nuke))
            return RET_FAIL;

        if (nuke.nuk_plane >= 0 && nuke.nuk_plane != pl.pln_uid) {
            pr("%s is already armed on plane #%d!\n",
               prnuke(&nuke), nuke.nuk_plane);
            return RET_FAIL;
        }

        if (p && (*p == 'y' || *p == 'Y'))
            pl.pln_flags |= PLN_AIRBURST;
        else
            pl.pln_flags &= ~PLN_AIRBURST;

        snprintf(buf, sizeof(buf), "armed on your %s in %s",
                 prplane(&pl), xyas(pl.pln_x, pl.pln_y, pl.pln_own));
        gift(pl.pln_own, player->cnum, &nuke, buf);
        pl.pln_nuketype = nuke.nuk_type;
        nuke.nuk_plane = pl.pln_uid;
        putplane(pl.pln_uid, &pl);
        putnuke(nuke.nuk_uid, &nuke);
        pr("%s armed with %s.\n", prplane(&pl), prnuke(&nuke));
        pr("Warhead on %s is programmed to %s\n",
           prplane(&pl),
           pl.pln_flags & PLN_AIRBURST ? "airburst" : "groundburst");
    }

    return RET_OK;
}

int
disarm(void)
{
    struct plnstr pl;
    struct nukstr nuke;
    struct nstr_item ni;
    struct sctstr sect;
    char buf[128];

    if (!snxtitem(&ni, EF_PLANE, player->argp[1]))
        return RET_SYN;
    while (nxtitem(&ni, &pl)) {
        if (!player->owner)
            continue;
        if (pl.pln_nuketype == -1)
            continue;
        if (opt_MARKET) {
            if (ontradingblock(EF_PLANE, &pl)) {
                pr("You cannot disarm %s while it is on the trading block!\n",
                   prplane(&pl));
                return RET_FAIL;
            }
        }
        if (nuk_on_plane(&nuke, pl.pln_uid) < 0) {
            CANT_REACH();
            continue;
        }
        getsect(nuke.nuk_x, nuke.nuk_y, &sect);
        if (!player->owner
            && getrel(getnatp(sect.sct_own), player->cnum) != ALLIED) {
            pr("Disarming %s in sector %s requires an alliance!\n",
               prplane(&pl), xyas(sect.sct_x, sect.sct_y, player->cnum));
            continue;
        }
        snprintf(buf, sizeof(buf), "unloaded in your %s at %s",
                 dchr[sect.sct_type].d_name,
                 xyas(sect.sct_x, sect.sct_y, sect.sct_own));
        gift(sect.sct_own, player->cnum, &nuke, buf);
        nuke.nuk_plane = -1;
        pl.pln_nuketype = -1;
        pl.pln_flags &= ~PLN_AIRBURST;
        putplane(pl.pln_uid, &pl);
        putnuke(nuke.nuk_uid, &nuke);
        pr("%s removed from %s and added to %s\n",
           prnuke(&nuke), prplane(&pl),
           xyas(pl.pln_x, pl.pln_y, player->cnum));
    }
    return RET_OK;
}

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