/*
* 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) 1986-2011, 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.
- *
+ *
* Known contributors to this file:
- *
+ * Markus Armbruster, 2005-2009
*/
-#include "misc.h"
-#include "player.h"
-#include "xy.h"
-#include "path.h"
-#include "nat.h"
-#include "sect.h"
+#include <config.h>
+
#include "file.h"
+#include "optlist.h"
+#include "path.h"
+#include "player.h"
#include "prototypes.h"
+#include "sect.h"
int
-getdir(s_char *prompt, s_char *stop_msg, s_char *view_msg,
- s_char *bomb_msg)
-{
- register int max_dir;
- register int min_dir;
- register int dir_num;
- s_char buf[1024];
-
- if (stop_msg != 0)
- min_dir = DIR_STOP;
- else
- min_dir = DIR_FIRST;
- if (view_msg == 0)
- max_dir = DIR_LAST;
- else
- max_dir = DIR_VIEW;
- while (1) {
- if (getstring(prompt, buf) == 0 || *buf == 0)
- return -1;
- dir_num = chkdir(buf[0], min_dir, max_dir);
- if (dir_num >= min_dir)
- break;
- direrr(stop_msg, view_msg, bomb_msg);
- }
- return dir_num;
-}
-
-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.
+ */
+int
+diridx(char dir)
+{
+ unsigned i = dir - 'a';
+
+ if (CANT_HAPPEN(i >= sizeof(dirindex) / sizeof(*dirindex)
+ || dirindex[i] < 0))
+ return DIR_STOP;
+ return dirindex[i];
+}
+
/*
* return pointer to path; prompt user until a stop char
* or a bomb char have been entered. A "bomb" char in
* move commands, and isn't valid for those commands
* which do not accept partial moves.
*/
-s_char *
-getpath(s_char *buf, s_char *arg, coord x, coord y, int onlyown,
- int showdes, int showxy, int destinations)
+char *
+getpath(char *buf, char *arg, coord x, coord y, int onlyown,
+ int showdes, enum p_mode destinations)
{
- s_char *p = buf;
- s_char *bp;
- s_char prompt[128];
+ char buf2[1024];
+ char *p = buf;
+ char *bp;
+ char prompt[128];
coord dx, dy;
- struct sctstr sect, dsect;
+ struct sctstr sect;
coord nx, ny;
int dir;
- s_char *execute;
- double mv_cost;
if (arg) {
strncpy(buf, arg, MAX_PATH_LEN - 1);
*p = 0;
}
- if (showxy)
- execute = " & '%c' to execute\n";
- else
- execute = "\n";
-
getsect(x, y, §);
- nx = x;
- ny = y;
- more:
+more:
while (*p) {
if (sarg_xy(p, &dx, &dy)) {
- bp = 0;
- if (destinations == P_NONE) {
+ bp = NULL;
+ switch (destinations) {
+ case P_NONE:
pr("Destination sectors not allowed here!\n");
- *p = 0;
+ break;
+ case P_FLYING:
+ bp = BestAirPath(buf2, x, y, dx, dy);
+ break;
+ case P_SAILING:
+ bp = BestShipPath(buf2, x, y, dx, dy, player->cnum);
+ break;
}
- 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) {
+ if (bp && p + strlen(bp) + 1 < buf + MAX_PATH_LEN) {
+ strcpy(p, bp);
pr("Using best path '%s'\n", p);
pr("Using total path '%s'\n", buf);
return buf;
} else {
pr("Can't get to %s from here!\n",
- xyas(nx, ny, player->cnum));
- *p = 0;
+ xyas(dx, dy, player->cnum));
}
break;
}
dir = chkdir(*p, DIR_STOP, DIR_LAST);
if (dir < 0) {
pr("\"%c\" is not legal...", *p);
- direrr("'%c' to stop", (s_char *)0, execute);
- *p = 0;
+ direrr("'%c' to stop\n", NULL, NULL);
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) {
+ if (dir == DIR_STOP) {
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;
- 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;
}
/*
* 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;
double m;
- int c;
x = *xp;
y = *yp;
m = 0.0;
for (pp = path; *pp; pp++) {
- if ((val = chkdir(*pp, DIR_STOP, DIR_LAST)) == 0)
+ if ((val = diridx(*pp)) == DIR_STOP)
break;
x += diroff[val][0];
y += diroff[val][1];
- c = dirch[val];
- if (c == DIR_STOP)
- break;
if (!getsect(x, y, &s))
return -1.0;
m += cost(&s, s.sct_own);
return m;
}
-/*
- * return true if "who" owns the path starting at x,y
- */
-int
-chkpath(natid who, s_char *path, coord x, coord y)
-{
- s_char *pp;
- int val;
- struct sctstr sect;
-
- for (pp = path; *pp; pp++) {
- if ((val = chkdir(*pp, DIR_STOP, DIR_LAST)) == 0)
- break;
- x += diroff[val][0];
- y += diroff[val][1];
- if (!getsect(x, y, §) || sect.sct_own != who)
- return 0;
- }
- return 1;
-}
-
void
-pathrange(register coord cx, register coord cy, register 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;
- while ((dir = chkdir(*pp, DIR_FIRST, DIR_LAST)) >= 0) {
- pp++;
+ 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