/*
* 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) 1986-2016, 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, 2005-2011
*/
-#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)
+chkdir(char dir_char, int min_dir, int max_dir)
{
- register int max_dir;
- register int min_dir;
- register int dir_num;
- s_char buf[1024];
+ int i;
- 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;
+ for (i = min_dir; i <= max_dir; i++)
+ if (dir_char == dirch[i])
+ return i;
+ return -1;
}
-int
-chkdir(s_char dir_char, int min_dir, int max_dir)
+void
+direrr(char *stop_msg, char *view_msg, char *map_msg)
{
- register int i;
-
- for (i = min_dir; i <= max_dir; i++)
- if (dir_char == dirch[i])
- return i;
- return -1;
+ 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)
+ pr(stop_msg, dirch[DIR_STOP]);
+ if (view_msg)
+ pr(view_msg, dirch[DIR_VIEW]);
+ if (map_msg)
+ pr(map_msg, dirch[DIR_MAP]);
}
-void
-direrr(s_char *stop_msg, s_char *view_msg, s_char *map_msg)
+/*
+ * Map direction @dir to a direction index DIR_STOP..DIR_LAST.
+ * @dir must be a valid direction.
+ */
+int
+diridx(char dir)
{
- 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)
- pr(stop_msg, dirch[DIR_STOP]);
- if (view_msg != 0)
- pr(view_msg, dirch[DIR_VIEW]);
- if (map_msg != 0)
- pr(map_msg, dirch[DIR_MAP]);
+ unsigned i = dir - 'a';
+
+ if (CANT_HAPPEN(i >= sizeof(dirindex) / sizeof(*dirindex)
+ || dirindex[i] < 0))
+ return DIR_STOP;
+ return dirindex[i];
}
/*
* 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,
+ int mobtype)
{
- s_char *p = buf;
- s_char *bp;
- s_char prompt[128];
- coord dx, dy;
- struct sctstr sect, dsect;
- coord nx, ny;
- int dir;
- s_char *execute;
- double mv_cost;
+ char buf2[1024];
+ char *p = buf;
+ char *bp;
+ size_t len;
+ char prompt[128];
+ coord dx, dy;
+ struct sctstr sect;
+ coord nx, ny;
+ int dir;
- if (arg) {
- strncpy(buf, arg, MAX_PATH_LEN - 1);
- buf[MAX_PATH_LEN - 1] = 0;
- } else {
- *p = 0;
- }
+ if (arg) {
+ strncpy(buf, arg, MAX_PATH_LEN - 1);
+ buf[MAX_PATH_LEN - 1] = 0;
+ } else {
+ *p = 0;
+ }
- if (showxy)
- execute = " & '%c' to execute\n";
- else
- execute = "\n";
-
- getsect(x,y,§);
- nx = x;
- ny = y;
+ getsect(x, y, §);
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 {
- pr("Can't get to %s from here!\n",
- xyas(nx,ny,player->cnum));
- *p = 0;
- }
- 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;
- 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;
- return buf;
- }
- x = nx;
- y = ny;
+ while (*p) {
+ if (sarg_xy(p, &dx, &dy)) {
+ 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));
+ 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);
+ break;
}
- fly_map(x,y);
- if (showdes) {
- getsect(x, y, §);
- sprintf(prompt, "<%c: %s> ", dchr[sect.sct_type].d_mnem,
- xyas(x, y, player->cnum));
- } else {
- sprintf(prompt, "<%d: %s> ", (int)(p - buf),
- xyas(x, y, player->cnum));
+ nx = x + diroff[dir][0];
+ ny = y + diroff[dir][1];
+ getsect(nx, ny, §);
+ if (onlyown && sect.sct_own != player->cnum) {
+ pr("You don't own %s; you can't go there!\n",
+ xyas(nx, ny, player->cnum));
+ break;
}
- if (!(bp = getstring(prompt, p)) || !*bp) {
- if (player->aborted)
- *buf = 0;
- return buf;
+ if (dir == DIR_STOP) {
+ *p = 0;
+ return buf;
}
+ ++p;
+ x = sect.sct_x;
+ y = sect.sct_y;
+ }
+ fly_map(x, y);
+ if (showdes) {
+ getsect(x, y, §);
+ sprintf(prompt, "<%c: %s> ", dchr[sect.sct_type].d_mnem,
+ xyas(x, y, player->cnum));
+ } else {
+ sprintf(prompt, "<%d: %s> ", (int)(p - buf),
+ xyas(x, y, player->cnum));
+ }
+ 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;
+ }
+ strcpy(p, bp);
+ if (*bp)
goto more;
-}
-
-/* ARGSUSED */
-double
-mcost(struct sctstr *sp, int own)
-{
- return sector_mcost(sp, MOB_ROAD);
-
-/*
- int m_cost;
-
- if (!(m_cost = dchr[sp->sct_type].d_mcst))
- return -1.0;
- if (m_cost < 25)
- return (200.0 + (m_cost - 3.0) * sp->sct_effic) / 500.0;
- else
- return (m_cost * 5.0 - (double)sp->sct_effic) / 25.0;
- */
+ return buf[0] ? buf : NULL;
}
/*
double
fcost(struct sctstr *sp, natid own)
{
- return 1.0;
+ return 1.0;
}
/*
double
ncost(struct sctstr *sp, natid own)
{
- return 1.0;
+ return 1.0;
}
/*
* 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;
- coord x;
- coord y;
- int val;
- double m;
- int c;
+ struct sctstr s;
+ char *pp;
+ coord x;
+ coord y;
+ int val;
+ double m;
- x = *xp;
- y = *yp;
- m = 0.0;
- for (pp = path; *pp; pp++) {
- if ((val = chkdir(*pp, DIR_STOP, DIR_LAST)) == 0)
- 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);
- }
- *xp = xnorm(x);
- *yp = ynorm(y);
- return m;
+ x = *xp;
+ y = *yp;
+ m = 0.0;
+ for (pp = path; *pp; pp++) {
+ if ((val = diridx(*pp)) == DIR_STOP)
+ break;
+ x += diroff[val][0];
+ y += diroff[val][1];
+ if (!getsect(x, y, &s))
+ return -1.0;
+ m += cost(&s, s.sct_own);
+ }
+ *xp = xnorm(x);
+ *yp = ynorm(y);
+ return m;
}
-/*
- * return true if "who" owns the path starting at x,y
- */
-int
-chkpath(natid who, s_char *path, coord x, coord y)
+void
+pathrange(coord cx, coord cy, char *pp, int border, struct range *range)
{
- s_char *pp;
- int val;
- struct sctstr sect;
+ int dir, lx, ly, hx, hy;
- 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;
-}
+ 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 < lx)
+ lx = cx;
+ if (cx > hx)
+ hx = cx;
+ if (cy < ly)
+ ly = cy;
+ if (cy > hy)
+ hy = cy;
+ }
-void
-pathrange(register coord cx, register coord cy, register s_char *pp, int border, struct range *range)
-{
- int dir;
+ lx -= border * 2;
+ hx += border * 2;
+ ly -= border;
+ hy += border;
- 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++;
- 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;
- }
- 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);
- xysize_range(range);
+ 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