Markus Armbruster
7e2008e7f4
Why upgrade? I'm not a lawyer, but here's my take on the differences to version 2: * Software patents: better protection against abuse of patents to prevent users from exercising the rights under the GPL. I doubt we'll get hit with a patent suit, but it's a good move just on general principles. * License compatibility: compatible with more free licenses, i.e. can "steal" more free software for use in Empire. I don't expect to steal much, but it's nice to have the option. * Definition of "source code": modernization of some details for today's networked world, to make it easier to distribute the software. Not really relevant to us now, as we normally distribute full source code. * Tivoization: this is about putting GPL-licensed software in hardware, then make the hardware refuse to run modified software. "Neat" trick to effectively deny its users their rights under the GPL. Abuse was "pioneered" by TiVo (popular digital video recorders). GPLv3 forbids it. Unlikely to become a problem for us. * Internationalization: more careful wording, to harden the license outside the US. The lawyers tell us it better be done that way. * License violations: friendlier way to deal with license violations. This has come out of past experience enforcing the GPL. * Additional permissions: Probably not relevant to us. Also include myself in the list of principal authors.
286 lines
8 KiB
C
286 lines
8 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2011, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure, Markus Armbruster
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*
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* Empire 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 3 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, see <http://www.gnu.org/licenses/>.
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* tend.c: Transfer goodies from one ship to another.
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*
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* Known contributors to this file:
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* Dave Pare, 1986
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* Thomas Ruschak, 1992
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* Steve McClure, 2000
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* Markus Armbruster, 2004-2009
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*/
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#include <config.h>
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#include "commands.h"
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#include "item.h"
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#include "land.h"
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#include "plague.h"
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#include "plane.h"
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#include "ship.h"
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static void expose_ship(struct shpstr *s1, struct shpstr *s2);
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static int tend_land(struct shpstr *tenderp, char *units);
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int
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tend(void)
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{
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struct nstr_item targets;
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struct nstr_item tenders;
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struct shpstr tender;
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struct shpstr target;
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struct ichrstr *ip;
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struct mchrstr *vbase;
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int amt;
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int retval;
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int ontender;
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int ontarget;
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int maxtender;
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int maxtarget;
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int transfer;
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int total;
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int type;
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char *p;
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char prompt[512];
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char buf[1024];
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p = getstarg(player->argp[1], "Tend what commodity (or 'land')? ",
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buf);
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if (!p || !*p)
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return RET_SYN;
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if (!strncmp(p, "land", 4))
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type = EF_LAND;
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else if (NULL != (ip = item_by_name(p)))
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type = EF_SECTOR;
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else {
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pr("Can't tend '%s'\n", p);
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return RET_SYN;
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}
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if (!snxtitem(&tenders, EF_SHIP, player->argp[2], "Tender(s)? "))
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return RET_SYN;
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while (nxtitem(&tenders, &tender)) {
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if (!player->owner)
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continue;
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if (type == EF_LAND) {
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sprintf(prompt, "Land unit(s) to tend from %s? ",
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prship(&tender));
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p = getstarg(player->argp[3], prompt, buf);
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if (!p)
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return RET_FAIL;
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if (!*p)
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continue;
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if (!check_ship_ok(&tender))
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return RET_SYN;
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if (0 != (retval = tend_land(&tender, p)))
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return retval;
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continue;
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}
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sprintf(prompt, "Number of %s to tend from %s? ",
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ip->i_name, prship(&tender));
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p = getstarg(player->argp[3], prompt, buf);
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if (!p)
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return RET_FAIL;
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if (!*p)
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continue;
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if (!check_ship_ok(&tender))
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return RET_SYN;
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if (!(amt = atoi(p))) {
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pr("Amount must be non-zero!\n");
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return RET_SYN;
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}
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ontender = tender.shp_item[ip->i_uid];
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if (ontender == 0 && amt > 0) {
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pr("No %s on %s\n", ip->i_name, prship(&tender));
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return RET_FAIL;
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}
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vbase = &mchr[(int)tender.shp_type];
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maxtender = vbase->m_item[ip->i_uid];
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if (maxtender == 0) {
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pr("A %s cannot hold any %s\n",
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mchr[(int)tender.shp_type].m_name, ip->i_name);
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break;
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}
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if (!snxtitem(&targets, EF_SHIP,
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player->argp[4], "Ships to be tended? "))
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return RET_FAIL;
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if (!check_ship_ok(&tender))
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return RET_SYN;
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total = 0;
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while (nxtitem(&targets, &target)) {
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if (!player->owner
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&& relations_with(target.shp_own, player->cnum) < FRIENDLY)
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continue;
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if (target.shp_uid == tender.shp_uid)
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continue;
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if (tender.shp_x != target.shp_x ||
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tender.shp_y != target.shp_y)
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continue;
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ontarget = target.shp_item[ip->i_uid];
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if (ontarget == 0 && amt < 0) {
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pr("No %s on %s\n", ip->i_name, prship(&target));
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continue;
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}
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vbase = &mchr[(int)target.shp_type];
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maxtarget = vbase->m_item[ip->i_uid];
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if (amt < 0) {
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if (!player->owner)
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amt = 0;
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/* take from target and give to tender */
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transfer = MIN(ontarget, -amt);
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transfer = MIN(maxtender - ontender, transfer);
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if (transfer == 0)
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continue;
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target.shp_item[ip->i_uid] = ontarget - transfer;
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ontender += transfer;
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total += transfer;
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} else {
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/* give to target from tender */
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transfer = MIN(ontender, amt);
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transfer = MIN(transfer, maxtarget - ontarget);
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if (transfer == 0)
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continue;
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target.shp_item[ip->i_uid] = ontarget + transfer;
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ontender -= transfer;
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total += transfer;
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if (transfer && target.shp_own != player->cnum) {
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wu(0, target.shp_own, "%s tended %d %s to %s\n",
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cname(player->cnum), total, ip->i_name,
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prship(&target));
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}
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}
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expose_ship(&tender, &target);
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putship(target.shp_uid, &target);
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if (amt > 0 && ontender == 0) {
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pr("%s out of %s\n", prship(&tender), ip->i_name);
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break;
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}
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}
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pr("%d total %s transferred %s %s\n",
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total, ip->i_name, (amt > 0) ? "off of" : "to",
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prship(&tender));
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tender.shp_item[ip->i_uid] = ontender;
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tender.shp_mission = 0;
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putship(tender.shp_uid, &tender);
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}
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return RET_OK;
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}
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static void
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expose_ship(struct shpstr *s1, struct shpstr *s2)
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{
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if (s1->shp_pstage == PLG_INFECT && s2->shp_pstage == PLG_HEALTHY)
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s2->shp_pstage = PLG_EXPOSED;
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if (s2->shp_pstage == PLG_INFECT && s1->shp_pstage == PLG_HEALTHY)
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s1->shp_pstage = PLG_EXPOSED;
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}
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static int
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tend_land(struct shpstr *tenderp, char *units)
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{
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struct nstr_item lni;
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struct nstr_item targets;
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struct shpstr target;
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struct lndstr land;
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char buf[1024];
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if (!snxtitem(&lni, EF_LAND, units, NULL))
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return RET_SYN;
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while (nxtitem(&lni, &land)) {
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if (!player->owner)
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continue;
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if (land.lnd_ship != tenderp->shp_uid) {
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pr("%s is not on %s!\n", prland(&land), prship(tenderp));
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continue;
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}
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if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
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pr("%s does not have \"assault\" capability and can't be tended\n",
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prland(&land));
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continue;
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}
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if (!snxtitem(&targets, EF_SHIP,
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player->argp[4], "Ship to be tended? "))
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return RET_FAIL;
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if (!check_ship_ok(tenderp) || !check_land_ok(&land))
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return RET_SYN;
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while (nxtitem(&targets, &target)) {
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if (!player->owner
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&& relations_with(target.shp_own, player->cnum) < FRIENDLY)
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continue;
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if (target.shp_uid == tenderp->shp_uid)
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continue;
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if (tenderp->shp_x != target.shp_x ||
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tenderp->shp_y != target.shp_y)
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continue;
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/* Fit unit on ship */
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getship(target.shp_uid, &target);
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if ((!(lchr[(int)land.lnd_type].l_flags & L_LIGHT)) &&
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(!((mchr[(int)target.shp_type].m_flags & M_SUPPLY) &&
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(!(mchr[(int)target.shp_type].m_flags & M_SUB))))) {
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pr("You can only load light units onto ships,\n"
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"unless the ship is a non-sub supply ship\n"
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"%s not tended\n", prland(&land));
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continue;
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}
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if ((mchr[(int)target.shp_type].m_flags & M_SUB) &&
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(lchr[(int)land.lnd_type].l_flags & L_SPY) &&
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!mchr[(int)target.shp_type].m_nland) {
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if (shp_nland(&target) > 1) {
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pr("%s doesn't have room for more than two spy units!\n",
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prship(&target));
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continue;
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}
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} else if (shp_nland(&target) >= mchr[target.shp_type].m_nland) {
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if (mchr[(int)target.shp_type].m_nland)
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pr("%s doesn't have room for any more land units!\n",
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prship(&target));
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else
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pr("%s doesn't carry land units!\n", prship(&target));
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continue;
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}
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pr("%s transferred from %s to %s\n",
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prland(&land), prship(tenderp), prship(&target));
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sprintf(buf, "loaded on your %s at %s",
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prship(&target), xyas(target.shp_x, target.shp_y,
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target.shp_own));
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gift(target.shp_own, player->cnum, &land, buf);
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land.lnd_ship = target.shp_uid;
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land.lnd_harden = 0;
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putland(land.lnd_uid, &land);
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expose_ship(tenderp, &target);
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putship(target.shp_uid, &target);
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putship(tenderp->shp_uid, tenderp);
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}
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}
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return 0;
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}
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