/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2013, 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/>.
*
* ---
*
- * See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
- * related information and legal notices. It is expected that any future
- * projects/authors will amend these files as needed.
+ * 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.
*
* ---
*
* coas.c: Look at all the ships in the world
- *
+ *
* Known contributors to this file:
* Keith Muller, 1983
* Dave Pare, 1986 (rewrite)
+ * Markus Armbruster, 2010
*/
-#include "misc.h"
-#include "player.h"
-#include "var.h"
-#include "sect.h"
-#include "ship.h"
-#include "nat.h"
-#include "xy.h"
-#include "nsc.h"
-#include "file.h"
+#include <config.h>
+
#include "commands.h"
#include "optlist.h"
+#include "ship.h"
-#define TSIZE 200
+#define TSIZE 200
struct coast {
- struct coast *c_next;
- int c_spotted;
- int c_number;
- struct shpstr c_shp;
+ struct coast *c_next;
+ int c_spotted;
+ int c_number;
+ struct shpstr c_shp;
};
-static int showship(struct coast **cpp, int x, int y);
+static int showship(struct coast **cpp, int x, int y);
/*
* format: coastwatch [<SECTS>]
int
coas(void)
{
- struct sctstr sect;
- struct nstr_sect nstr;
- struct coast *cp;
- struct coast *list[TSIZE];
- int i, k, j, n;
- int vrange, see;
- int x, y;
- int mink, minj, maxk, maxj;
- int nship = 0;
- float tech;
- struct nstr_item ni;
+ struct sctstr sect;
+ struct nstr_sect nstr;
+ struct coast *cp;
+ struct coast *list[TSIZE];
+ int i, n;
+ int vrange, see;
+ int x, y, dx, dy, dxmax;
+ int nship = 0;
+ double tech;
+ struct nstr_item ni;
- if (snxtsct(&nstr, player->argp[1]) == 0)
- return RET_SYN;
- for (i = 0; i < TSIZE; i++)
- list[i] = 0;
- cp = (struct coast *)malloc(sizeof(*cp));
- snxtitem_all(&ni, EF_SHIP);
- while (nxtitem(&ni, (s_char *) &cp->c_shp)) {
- if (cp->c_shp.shp_own == 0 || cp->c_shp.shp_own == player->cnum)
- continue;
- /*
- * don't bother putting subs in the table...
- * unless they're in a sector you own (harbor or such)
- */
- getsect(cp->c_shp.shp_x, cp->c_shp.shp_y, §);
- if ((mchr[(int)cp->c_shp.shp_type].m_flags & M_SUB) &&
- (sect.sct_own != player->cnum))
- continue;
- n = scthash(cp->c_shp.shp_x, cp->c_shp.shp_y, TSIZE);
- cp->c_spotted = 0;
- cp->c_number = i;
- cp->c_next = list[n];
- list[n] = cp;
- cp = (struct coast *)malloc(sizeof(*cp));
- nship++;
+ if (!snxtsct(&nstr, player->argp[1]))
+ return RET_SYN;
+ for (i = 0; i < TSIZE; i++)
+ list[i] = NULL;
+ cp = malloc(sizeof(*cp));
+ snxtitem_all(&ni, EF_SHIP);
+ while (nxtitem(&ni, &cp->c_shp)) {
+ if (cp->c_shp.shp_own == 0 || cp->c_shp.shp_own == player->cnum)
+ continue;
+ /*
+ * don't bother putting subs in the table...
+ * unless they're in a sector you own (harbor or such)
+ */
+ getsect(cp->c_shp.shp_x, cp->c_shp.shp_y, §);
+ if ((mchr[(int)cp->c_shp.shp_type].m_flags & M_SUB) &&
+ (sect.sct_own != player->cnum))
+ continue;
+ n = scthash(cp->c_shp.shp_x, cp->c_shp.shp_y, TSIZE);
+ cp->c_spotted = 0;
+ cp->c_number = i;
+ cp->c_next = list[n];
+ list[n] = cp;
+ cp = malloc(sizeof(*cp));
+ nship++;
+ }
+ /* get that last one! */
+ free(cp);
+ pr("- = [ Coastwatch report for %s ] = -\n", cname(player->cnum));
+ pr(" Country Ship Location\n");
+ tech = tfact(player->cnum, 1.0);
+ while (nxtsct(&nstr, §) && nship) {
+ if (sect.sct_own != player->cnum)
+ continue;
+ see = sect.sct_type == SCT_RADAR ? 14 : 4;
+ vrange = (int)(sect.sct_effic / 100.0 * see * tech);
+ if (vrange < 1)
+ vrange = 1;
+ for (dy = -vrange; dy <= vrange; dy++) {
+ y = ynorm(sect.sct_y + dy);
+ dxmax = 2 * vrange - abs(dy);
+ for (dx = -dxmax; dx <= dxmax; dx += 2) {
+ x = xnorm(sect.sct_x + dx);
+ n = scthash(x, y, TSIZE);
+ if (!list[n])
+ continue;
+ nship -= showship(&list[n], x, y);
+ }
}
- /* get that last one! */
- free((s_char *)cp);
- pr("- = [ Coastwatch report for %s ] = -\n", cname(player->cnum));
- pr(" Country Ship Location\n");
- tech = tfact(player->cnum, 1.0);
- while (nxtsct(&nstr, §) && nship) {
- if (sect.sct_own != player->cnum)
- continue;
- see = sect.sct_type == SCT_RADAR ? 14 : 4;
- vrange = (int) (sect.sct_effic / 100.0 * see * tech);
- if (vrange < 1)
- vrange = 1;
- maxk = vrange;
- maxj = vrange * 2;
- vrange *= vrange;
- mink = -maxk;
- minj = -maxj;
- for (j = minj; j <= maxj && nship; j++) {
- x = xnorm(sect.sct_x + j);
- for (k = mink; k <= maxk && nship; k++) {
- if ((j + k) & 01)
- continue;
- /* quick range check to save time... */
- if (vrange < (j * j + 3 * k * k) / 4)
- continue;
- y = ynorm(sect.sct_y + k);
- n = scthash(x, y, TSIZE);
- if (list[n] == 0)
- continue;
- nship -= showship(&list[n], x, y);
- }
- }
+ }
+ /* free up the coast structs calloc'ed above */
+ for (i = 0; i < TSIZE; i++) {
+ while (NULL != (cp = list[i])) {
+ list[i] = cp->c_next;
+ free(cp);
}
- /* free up the coast structs calloc'ed above */
- for (i = 0; i < TSIZE; i++) {
- while (NULL != (cp = list[i])) {
- list[i] = cp->c_next;
- free((s_char *)cp);
- }
- }
- return RET_OK;
+ }
+ return RET_OK;
}
static int
showship(struct coast **cpp, int x, int y)
{
- register struct coast *cp;
- register struct coast *todelete = 0;
- register struct coast **prev;
- int nship = 0;
+ struct coast *cp;
+ struct coast *todelete = NULL;
+ struct coast **prev;
+ int nship = 0;
- prev = 0;
- cp = *cpp;
- prev = cpp;
- do {
- /* we delete it, we free it. */
- if (todelete) {
- free((s_char *)todelete);
- todelete = 0;
- }
- if (cp->c_shp.shp_x != x || cp->c_shp.shp_y != y) {
- prev = &(*prev)->c_next;
- continue;
- }
- pr(" %12.12s (#%3d) %s @ %s\n",
- cname(cp->c_shp.shp_own), cp->c_shp.shp_own,
- prship(&cp->c_shp), xyas(x, y, player->cnum));
- if (opt_HIDDEN) {
- setcont(player->cnum, cp->c_shp.shp_own, FOUND_COAST);
- }
- *prev = cp->c_next;
- todelete = cp;
- nship++;
- } while (NULL != (cp = cp->c_next));
- /* check that last one! */
- if (todelete)
- free((s_char *)todelete);
- return (nship);
+ prev = NULL;
+ cp = *cpp;
+ prev = cpp;
+ do {
+ /* we delete it, we free it. */
+ if (todelete) {
+ free(todelete);
+ todelete = NULL;
+ }
+ if (cp->c_shp.shp_x != x || cp->c_shp.shp_y != y) {
+ prev = &(*prev)->c_next;
+ continue;
+ }
+ pr(" %12.12s (#%3d) %s @ %s\n",
+ cname(cp->c_shp.shp_own), cp->c_shp.shp_own,
+ prship(&cp->c_shp), xyas(x, y, player->cnum));
+ if (opt_HIDDEN) {
+ setcont(player->cnum, cp->c_shp.shp_own, FOUND_COAST);
+ }
+ *prev = cp->c_next;
+ todelete = cp;
+ nship++;
+ } while (NULL != (cp = cp->c_next));
+ /* check that last one! */
+ if (todelete)
+ free(todelete);
+ return nship;
}
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