/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire 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
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* 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
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
* ---
*
* tend.c: Transfer goodies from one ship to another.
- *
+ *
* Known contributors to this file:
* Dave Pare, 1986
* Thomas Ruschak, 1992
* Steve McClure, 2000
+ * Markus Armbruster, 2004-2017
*/
#include <config.h>
#include "item.h"
#include "land.h"
#include "plague.h"
-#include "plane.h"
#include "ship.h"
+static int can_tend_to(struct shpstr *, int, struct shpstr *, int);
+static int tend_comm_to(struct shpstr *, struct ichrstr *, int,
+ struct shpstr *);
static void expose_ship(struct shpstr *s1, struct shpstr *s2);
-static int tend_land(struct shpstr *tenderp, char *units);
+static int tend_land(struct shpstr *tenderp, int, char *units);
int
-tend(void)
+c_tend(void)
{
struct nstr_item targets;
struct nstr_item tenders;
struct mchrstr *vbase;
int amt;
int retval;
- int ontender;
- int ontarget;
int maxtender;
- int maxtarget;
int transfer;
int total;
int type;
char prompt[512];
char buf[1024];
- if (!(p = getstarg(player->argp[1],
- "Tend what commodity (or 'land')? ", buf)) || !*p)
+ p = getstarg(player->argp[1], "Tend what commodity (or 'land')? ",
+ buf);
+ if (!p || !*p)
return RET_SYN;
if (!strncmp(p, "land", 4))
return RET_SYN;
}
- if (!snxtitem(&tenders, EF_SHIP,
- getstarg(player->argp[2], "Tender(s)? ", buf)))
+ if (!snxtitem(&tenders, EF_SHIP, player->argp[2], "Tender(s)? "))
return RET_SYN;
while (nxtitem(&tenders, &tender)) {
- if (!player->owner)
+ if (!player->owner || !tender.shp_own) {
+ if (tenders.sel == NS_LIST)
+ pr("You don't own ship #%d!\n", tender.shp_uid);
continue;
+ }
if (type == EF_LAND) {
sprintf(prompt, "Land unit(s) to tend from %s? ",
prship(&tender));
- if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
+ p = getstarg(player->argp[3], prompt, buf);
+ if (!p)
+ return RET_FAIL;
+ if (!*p)
continue;
if (!check_ship_ok(&tender))
return RET_SYN;
- if (0 != (retval = tend_land(&tender, p)))
+ retval = tend_land(&tender, tenders.sel == NS_LIST, p);
+ if (retval)
return retval;
continue;
}
sprintf(prompt, "Number of %s to tend from %s? ",
ip->i_name, prship(&tender));
- if (!(p = getstarg(player->argp[3], prompt, buf)) || !*p)
+ p = getstarg(player->argp[3], prompt, buf);
+ if (!p)
+ return RET_FAIL;
+ if (!*p)
continue;
if (!check_ship_ok(&tender))
return RET_SYN;
pr("Amount must be non-zero!\n");
return RET_SYN;
}
- ontender = tender.shp_item[ip->i_uid];
- if (ontender == 0 && amt > 0) {
+ if (!tender.shp_item[ip->i_uid] && amt > 0) {
pr("No %s on %s\n", ip->i_name, prship(&tender));
- return RET_FAIL;
+ continue;
}
vbase = &mchr[(int)tender.shp_type];
maxtender = vbase->m_item[ip->i_uid];
if (maxtender == 0) {
- pr("A %s cannot hold any %s\n",
- mchr[(int)tender.shp_type].m_name, ip->i_name);
- break;
+ pr("%s cannot hold any %s\n", prship(&tender), ip->i_name);
+ continue;
}
if (!snxtitem(&targets, EF_SHIP,
- getstarg(player->argp[4], "Ships to be tended? ",
- buf)))
- break;
+ player->argp[4], "Ships to be tended? "))
+ return RET_FAIL;
if (!check_ship_ok(&tender))
return RET_SYN;
total = 0;
while (nxtitem(&targets, &target)) {
- if (!player->owner &&
- (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
- continue;
- if (target.shp_uid == tender.shp_uid)
- continue;
- if (tender.shp_x != target.shp_x ||
- tender.shp_y != target.shp_y)
- continue;
- ontarget = target.shp_item[ip->i_uid];
- if (ontarget == 0 && amt < 0) {
- pr("No %s on %s\n", ip->i_name, prship(&target));
- continue;
- }
- vbase = &mchr[(int)target.shp_type];
- maxtarget = vbase->m_item[ip->i_uid];
- if (amt < 0) {
- if (!player->owner)
- amt = 0;
-
- /* take from target and give to tender */
- transfer = MIN(ontarget, -amt);
- transfer = MIN(maxtender - ontender, transfer);
- if (transfer == 0)
+ if (amt > 0) {
+ if (!can_tend_to(&tender, tenders.sel == NS_LIST,
+ &target, targets.sel == NS_LIST))
continue;
- target.shp_item[ip->i_uid] = ontarget - transfer;
- ontender += transfer;
- total += transfer;
+ transfer = tend_comm_to(&tender, ip, amt, &target);
} else {
- /* give to target from tender */
- transfer = MIN(ontender, amt);
- transfer = MIN(transfer, maxtarget - ontarget);
- if (transfer == 0)
+ if (!player->owner) {
+ if (targets.sel == NS_LIST)
+ pr("You don't own ship #%d!\n", target.shp_uid);
continue;
- target.shp_item[ip->i_uid] = ontarget + transfer;
- ontender -= transfer;
- total += transfer;
- if (transfer && target.shp_own != player->cnum) {
- wu(0, target.shp_own, "%s tended %d %s to %s\n",
- cname(player->cnum), total, ip->i_name,
- prship(&target));
}
+ if (!can_tend_to(&target, targets.sel == NS_LIST,
+ &tender, tenders.sel == NS_LIST))
+ continue;
+ transfer = tend_comm_to(&target, ip, -amt, &tender);
}
+ if (!transfer)
+ continue;
+ total += transfer;
expose_ship(&tender, &target);
putship(target.shp_uid, &target);
- if (amt > 0 && ontender == 0) {
+ if (amt > 0 && !tender.shp_item[ip->i_uid]) {
pr("%s out of %s\n", prship(&tender), ip->i_name);
break;
}
+ if (amt < 0 && tender.shp_item[ip->i_uid] == maxtender)
+ break;
}
pr("%d total %s transferred %s %s\n",
total, ip->i_name, (amt > 0) ? "off of" : "to",
prship(&tender));
- tender.shp_item[ip->i_uid] = ontender;
tender.shp_mission = 0;
putship(tender.shp_uid, &tender);
}
return RET_OK;
}
+static int
+can_tend_to(struct shpstr *from, int noisy_from,
+ struct shpstr *to, int noisy_to)
+{
+ /*
+ * Careful: error messages must not disclose anything on foreign
+ * @to the player doesn't already know, or could trivially learn.
+ */
+ if (!to->shp_own) {
+ if (noisy_to)
+ pr("You don't own ship #%d!\n", to->shp_uid);
+ return 0;
+ }
+ if (from->shp_uid == to->shp_uid) {
+ if (noisy_from && noisy_to)
+ pr("%s won't tend to itself\n", prship(from));
+ return 0;
+ }
+ if (from->shp_x != to->shp_x || from->shp_y != to->shp_y) {
+ if (noisy_from && noisy_to) {
+ /* Don't disclose foreign @to exists elsewhere */
+ if (player->god || to->shp_own == player->cnum)
+ pr("%s is not in the same sector as %s\n",
+ prship(to), prship(from));
+ else
+ pr("You don't own ship #%d!\n", to->shp_uid);
+ }
+ return 0;
+ }
+ if (!player->god && to->shp_own != player->cnum
+ && relations_with(to->shp_own, player->cnum) < FRIENDLY) {
+ if (noisy_to) {
+ /*
+ * Don't disclose unfriendly @to exists here unless
+ * lookout from @from would see it.
+ */
+ if ((mchr[from->shp_type].m_flags & M_SUB)
+ || (mchr[to->shp_type].m_flags & M_SUB))
+ pr("You don't own ship #%d!\n", from->shp_uid);
+ else
+ pr("You are not on friendly terms with"
+ " the owner of ship #%d!\n",
+ to->shp_uid);
+ }
+ return 0;
+ }
+ return 1;
+}
+
+static int
+tend_comm_to(struct shpstr *from, struct ichrstr *ip, int amt,
+ struct shpstr *to)
+{
+ int can_give = from->shp_item[ip->i_uid];
+ int to_max = mchr[to->shp_type].m_item[ip->i_uid];
+ int can_take = to_max - to->shp_item[ip->i_uid];
+ int transfer;
+
+ if (!to_max) {
+ pr("%s cannot hold any %s\n", prship(to), ip->i_name);
+ return 0;
+ }
+ if (ip->i_uid == I_CIVIL && from->shp_own != to->shp_own) {
+ pr("%s civilians refuse to board %s!\n",
+ from->shp_own == player->cnum ? "Your" : "Foreign",
+ prship(to));
+ return 0;
+ }
+ if (!can_give) {
+ pr("No %s on %s\n", ip->i_name, prship(from));
+ return 0;
+ }
+ if (!can_take) {
+ pr("%s can't hold more %s\n", prship(to), ip->i_name);
+ return 0;
+ }
+
+ transfer = MIN(can_give, amt);
+ transfer = MIN(can_take, transfer);
+ from->shp_item[ip->i_uid] -= transfer;
+ to->shp_item[ip->i_uid] += transfer;
+ if (to->shp_own != player->cnum) {
+ wu(0, to->shp_own, "%s tended %d %s to %s\n",
+ cname(player->cnum), transfer, ip->i_name, prship(to));
+ }
+
+ return transfer;
+}
+
static void
expose_ship(struct shpstr *s1, struct shpstr *s2)
{
}
static int
-tend_land(struct shpstr *tenderp, char *units)
+tend_land(struct shpstr *tenderp, int noisy, char *units)
{
struct nstr_item lni;
struct nstr_item targets;
struct shpstr target;
struct lndstr land;
- struct plnstr plane;
- struct nstr_item pni;
char buf[1024];
- if (!snxtitem(&lni, EF_LAND, units))
+ if (!snxtitem(&lni, EF_LAND, units, NULL))
return RET_SYN;
while (nxtitem(&lni, &land)) {
- if (!player->owner)
+ if (!player->owner || !land.lnd_own) {
+ if (lni.sel == NS_LIST)
+ pr("You don't own land unit #%d!\n", land.lnd_uid);
continue;
+ }
if (land.lnd_ship != tenderp->shp_uid) {
- pr("%s is not on %s!\n", prland(&land), prship(tenderp));
+ if (lni.sel == NS_LIST)
+ pr("%s is not on %s!\n", prland(&land), prship(tenderp));
continue;
}
if (!(lchr[(int)land.lnd_type].l_flags & L_ASSAULT)) {
continue;
}
if (!snxtitem(&targets, EF_SHIP,
- getstarg(player->argp[4], "Ship to be tended? ",
- buf)))
- break;
- if (!check_land_ok(&land))
+ player->argp[4], "Ship to be tended? "))
+ return RET_FAIL;
+ if (!check_ship_ok(tenderp) || !check_land_ok(&land))
return RET_SYN;
while (nxtitem(&targets, &target)) {
- if (!player->owner &&
- (getrel(getnatp(target.shp_own), player->cnum) < FRIENDLY))
- continue;
- if (target.shp_uid == tenderp->shp_uid)
- continue;
- if (tenderp->shp_x != target.shp_x ||
- tenderp->shp_y != target.shp_y)
+ if (!can_tend_to(tenderp, noisy,
+ &target, targets.sel == NS_LIST))
continue;
/* Fit unit on ship */
- count_units(&target);
getship(target.shp_uid, &target);
if ((!(lchr[(int)land.lnd_type].l_flags & L_LIGHT)) &&
if ((mchr[(int)target.shp_type].m_flags & M_SUB) &&
(lchr[(int)land.lnd_type].l_flags & L_SPY) &&
!mchr[(int)target.shp_type].m_nland) {
- if (target.shp_nland > 1) {
+ if (shp_nland(&target) > 1) {
pr("%s doesn't have room for more than two spy units!\n",
prship(&target));
continue;
}
- } else if (target.shp_nland >= mchr[(int)target.shp_type].m_nland) {
+ } else if (shp_nland(&target) >= mchr[target.shp_type].m_nland) {
if (mchr[(int)target.shp_type].m_nland)
pr("%s doesn't have room for any more land units!\n",
prship(&target));
gift(target.shp_own, player->cnum, &land, buf);
land.lnd_ship = target.shp_uid;
land.lnd_harden = 0;
- land.lnd_mission = 0;
- target.shp_nland++;
putland(land.lnd_uid, &land);
expose_ship(tenderp, &target);
putship(target.shp_uid, &target);
- count_units(tenderp);
putship(tenderp->shp_uid, tenderp);
- snxtitem_xy(&pni, EF_PLANE, land.lnd_x, land.lnd_y);
- while (nxtitem(&pni, &plane)) {
- if (plane.pln_flags & PLN_LAUNCHED)
- continue;
- if (plane.pln_land != land.lnd_uid)
- continue;
- sprintf(buf, "loaded on %s", prship(&target));
- gift(target.shp_own, player->cnum, &plane, buf);
- plane.pln_mission = 0;
- putplane(plane.pln_uid, &plane);
- }
+ break;
}
}
return 0;
projects / empserver / blobdiff