/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2005, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2020, 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.
*
* ---
*
- * path.c: Routines associated with paths, directions, etc.
- *
+ * paths.c: Routines associated with paths, directions, etc.
+ *
* Known contributors to this file:
- *
+ * Markus Armbruster, 2005-2020
*/
-#include "misc.h"
-#include "player.h"
-#include "xy.h"
+#include <config.h>
+
+#include "optlist.h"
#include "path.h"
-#include "nat.h"
-#include "sect.h"
-#include "file.h"
+#include "player.h"
#include "prototypes.h"
+#include "sect.h"
int
-chkdir(s_char dir_char, int min_dir, int max_dir)
+chkdir(char dir_char, int min_dir, int max_dir)
{
- register int i;
+ int i;
for (i = min_dir; i <= max_dir; i++)
if (dir_char == dirch[i])
}
void
-direrr(s_char *stop_msg, s_char *view_msg, s_char *map_msg)
+direrr(char *stop_msg, char *view_msg, char *map_msg)
{
pr("Legal directions are:\n");
pr(" %c %c\n", dirch[DIR_UL], dirch[DIR_UR]);
pr("%c %c\n", dirch[DIR_L], dirch[DIR_R]);
pr(" %c %c\n", dirch[DIR_DL], dirch[DIR_DR]);
- if (stop_msg != 0)
+ if (stop_msg)
pr(stop_msg, dirch[DIR_STOP]);
- if (view_msg != 0)
+ if (view_msg)
pr(view_msg, dirch[DIR_VIEW]);
- if (map_msg != 0)
+ if (map_msg)
pr(map_msg, dirch[DIR_MAP]);
}
/*
- * Map direction DIR to a direction index DIR_STOP..DIR_LAST.
- * DIR must be a valid direction.
+ * Map direction @dir to a direction index DIR_STOP..DIR_LAST.
+ * @dir must be a valid direction.
*/
int
diridx(char dir)
{
unsigned i = dir - 'a';
- if (CANT_HAPPEN(i >= sizeof(dirindex) / sizeof(*dirindex)
+ if (CANT_HAPPEN(i >= ARRAY_SIZE(dirindex)
|| dirindex[i] < 0))
return DIR_STOP;
return dirindex[i];
* which do not accept partial moves.
*/
char *
-getpath(char *buf, char *arg, coord x, coord y, int onlyown,
- int showdes, int destinations)
+getpath(char *buf, char *arg, coord x, coord y, int onlyown, int showdes,
+ int mobtype)
{
+ char buf2[1024];
char *p = buf;
char *bp;
+ size_t len;
char prompt[128];
coord dx, dy;
- struct sctstr sect, dsect;
+ struct sctstr sect;
coord nx, ny;
int dir;
- double mv_cost;
if (arg) {
strncpy(buf, arg, MAX_PATH_LEN - 1);
}
getsect(x, y, §);
- nx = x;
- ny = y;
- more:
+more:
while (*p) {
if (sarg_xy(p, &dx, &dy)) {
- bp = 0;
- if (destinations == P_NONE) {
- pr("Destination sectors not allowed here!\n");
- *p = 0;
- }
- if (getsect(dx, dy, &dsect)) {
- if (destinations == P_WALKING) {
- bp = BestLandPath(p, §, &dsect,
- &mv_cost, MOB_ROAD);
- } else if (destinations == P_FLYING) {
- bp = BestAirPath(p, nx, ny, dx, dy);
- }
- } else {
- pr("Invalid destination sector!\n");
- *p = 0;
- }
- if (bp) {
- pr("Using best path '%s'\n", p);
- pr("Using total path '%s'\n", buf);
- return buf;
- } else {
+ if (path_find(x, y, dx, dy, player->cnum, mobtype) < 0) {
pr("Can't get to %s from here!\n",
xyas(dx, dy, player->cnum));
- *p = 0;
+ break;
}
- break;
+ len = path_find_route(p, buf + MAX_PATH_LEN - p, x, y, dx, dy);
+ if (p + len >= buf + MAX_PATH_LEN) {
+ pr("Can't handle path to %s, it's too long, sorry.\n",
+ xyas(dx, dy, player->cnum));
+ break;
+ }
+ pr("Using best path '%s'\n", p);
+ pr("Using total path '%s'\n", buf);
+ return buf;
}
dir = chkdir(*p, DIR_STOP, DIR_LAST);
if (dir < 0) {
pr("\"%c\" is not legal...", *p);
direrr("'%c' to stop\n", NULL, NULL);
- *p = 0;
break;
}
nx = x + diroff[dir][0];
ny = y + diroff[dir][1];
getsect(nx, ny, §);
if (onlyown && sect.sct_own != player->cnum) {
- *p = 0;
pr("You don't own %s; you can't go there!\n",
xyas(nx, ny, player->cnum));
break;
}
- if (dir == DIR_STOP || dir == DIR_MAP) {
- p[1] = 0;
- return buf;
- }
- if (++p - buf == MAX_PATH_LEN) {
- pr("Path length may not exceed %d.\n", MAX_PATH_LEN);
- pr("Aborting...\n");
- *buf = 0;
+ if (dir == DIR_STOP) {
+ *p = 0;
return buf;
}
- x = nx;
- y = ny;
+ ++p;
+ x = sect.sct_x;
+ y = sect.sct_y;
}
fly_map(x, y);
if (showdes) {
sprintf(prompt, "<%d: %s> ", (int)(p - buf),
xyas(x, y, player->cnum));
}
- if (!(bp = getstring(prompt, p)) || !*bp) {
- if (player->aborted)
- *buf = 0;
- return buf;
+ bp = getstring(prompt, buf2);
+ if (!bp)
+ return NULL;
+ if (p + strlen(bp) + 1 >= buf + MAX_PATH_LEN) {
+ pr("Path length may not exceed %d.\n", MAX_PATH_LEN);
+ pr("Aborting...\n");
+ return NULL;
}
- goto more;
+ strcpy(p, bp);
+ if (*bp)
+ goto more;
+ return buf[0] ? buf : NULL;
}
/*
* movement cost it takes to get there.
*/
double
-pathtoxy(s_char *path, coord *xp, coord *yp,
- double (*cost) (struct sctstr *, natid))
+pathtoxy(char *path, coord *xp, coord *yp,
+ double (*cost)(struct sctstr *, natid))
{
struct sctstr s;
- s_char *pp;
+ char *pp;
coord x;
coord y;
int val;
}
void
-pathrange(coord cx, coord cy, s_char *pp, int border, struct range *range)
+pathrange(coord cx, coord cy, char *pp, int border, struct range *range)
{
- int dir;
+ int dir, lx, ly, hx, hy;
- range->lx = cx;
- range->hx = cx;
- range->ly = cy;
- range->hy = cy;
- range->width = 0;
- range->height = 0;
+ lx = hx = cx;
+ ly = hy = cy;
for (; *pp; pp++) {
dir = diridx(*pp);
if (dir == DIR_STOP)
break;
cx += diroff[dir][0];
cy += diroff[dir][1];
- if (cx < range->lx)
- range->lx = cx;
- if (cx > range->hx)
- range->hx = cx;
- if (cy < range->ly)
- range->ly = cy;
- if (cy > range->hy)
- range->hy = cy;
+ if (cx < lx)
+ lx = cx;
+ if (cx > hx)
+ hx = cx;
+ if (cy < ly)
+ ly = cy;
+ if (cy > hy)
+ hy = cy;
}
- range->lx = xnorm(range->lx - border * 2);
- range->ly = ynorm(range->ly - border);
- range->hx = xnorm(range->hx + border * 2 + 1);
- range->hy = ynorm(range->hy + border + 1);
+
+ lx -= border * 2;
+ hx += border * 2;
+ ly -= border;
+ hy += border;
+
+ range->lx = xnorm(lx);
+ range->hx = xnorm(hx - lx < WORLD_X ? hx : lx - 1);
+ range->ly = ynorm(ly);
+ range->hy = ynorm(hy - ly < WORLD_Y ? hy : ly - 1);
xysize_range(range);
}
projects / empserver / blobdiff