git.pond.sub.org Git - empserver/blob - src/lib/commands/navi.c

   1 /*
   2  *  Empire - A multi-player, client/server Internet based war game.
   3  *  Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
   4  *                           Ken Stevens, Steve McClure
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ---
  21  *
  22  *  See files README, COPYING and CREDITS in the root of the source
  23  *  tree for related information and legal notices.  It is expected
  24  *  that future projects/authors will amend these files as needed.
  25  *
  26  *  ---
  27  *
  28  *  navi.c: Navigate ships and such
  29  *
  30  *  Known contributors to this file:
  31  *     Ken Stevens, 1995 (rewritten)
  32  *     Ron Koenderink, 2006-2007
  33  */
  34
  35 #include <config.h>
  36
  37 #include <ctype.h>
  38 #include "commands.h"
  39 #include "map.h"
  40 #include "optlist.h"
  41 #include "path.h"
  42 #include "empobj.h"
  43 #include "unit.h"
  44
  45 static void pr_leader_change(struct empobj *leader);
  46 static struct empobj *get_leader(struct emp_qelem *list);
  47 static void switch_leader(struct emp_qelem *list, int uid);
  48
  49 int
  50 navi(void)
  51 {
  52     struct nstr_item ni_ship;
  53     struct emp_qelem ship_list;
  54     double minmob, maxmob;
  55     int together;
  56
  57     if (!snxtitem(&ni_ship, EF_SHIP, player->argp[1]))
  58         return RET_SYN;
  59     shp_sel(&ni_ship, &ship_list);
  60     shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
  61     if (QEMPTY(&ship_list)) {
  62         pr("No ships\n");
  63         return RET_FAIL;
  64     }
  65
  66     return do_unit_move(&ship_list, &together, &minmob, &maxmob);
  67 }
  68
  69 int
  70 do_unit_move(struct emp_qelem *unit_list, int *together,
  71              double *minmob, double *maxmob)
  72 {
  73     char *cp = NULL;
  74     int leader_uid;
  75     struct empobj *leader;
  76     int dir;
  77     int stopping = 0;
  78     int skip = 0;
  79     char buf[1024];
  80     char prompt[128];
  81     char scanspace[1024];
  82     char pathtaken[1024];  /* Doubtful we'll have a path longer than this */
  83     char *pt = pathtaken;
  84     char bmap_flag;
  85     int ac;
  86     short type;
  87
  88     leader = get_leader(unit_list);
  89     leader_uid = leader->uid;
  90     type = leader->ef_type;
  91     pr("%s is %s\n",
  92         type == EF_SHIP ? "Flagship" : "Leader",
  93         obj_nameof(leader));
  94
  95     if (player->argp[2]) {
  96         strcpy(buf, player->argp[2]);
  97         if (type == EF_SHIP) {
  98             if (!(cp = shp_path(*together, (struct shpstr *)leader, buf)))
  99                 cp = player->argp[2];
 100         } else {
 101             if (!(cp = lnd_path(*together, (struct lndstr *)leader, buf)))
 102                 cp = player->argp[2];
 103         }
 104     }
 105
 106     *pt = '\0';
 107     while (!QEMPTY(unit_list)) {
 108         char dp[80];
 109
 110         if (cp == NULL || *cp == '\0' || stopping) {
 111             stopping = 0;
 112             if (type == EF_SHIP)
 113                 shp_nav(unit_list, minmob, maxmob, together, player->cnum);
 114             else
 115                 lnd_mar(unit_list, minmob, maxmob, together, player->cnum);
 116             if (QEMPTY(unit_list)) {
 117                 pr("No %s left\n",
 118                     type == EF_SHIP ? "ships" : "lands");
 119                 if (strlen(pathtaken) > 0) {
 120                     pathtaken[strlen(pathtaken) - 1] = '\0';
 121                     if (type == EF_SHIP && strlen(pathtaken) > 0)
 122                         pr("Path taken: %s\n", pathtaken);
 123                 }
 124                 return RET_OK;
 125             }
 126             leader = get_leader(unit_list);
 127             if (leader->uid != leader_uid) {
 128                 leader_uid = leader->uid;
 129                 pr_leader_change(leader);
 130                 stopping = 1;
 131                 continue;
 132             }
 133             if (!skip)
 134                 nav_map(leader->x, leader->y,
 135                         type == EF_SHIP ?
 136                             !(mchr[(int)leader->type].m_flags & M_SUB) : 1);
 137             else
 138                 skip = 0;
 139             sprintf(prompt, "<%.1f:%.1f: %s> ", *maxmob,
 140                     *minmob, xyas(leader->x, leader->y, player->cnum));
 141             cp = getstring(prompt, buf);
 142             /* Just in case any of our units were shelled while we were
 143              * at the prompt, we call shp_nav() or lnd_mar() again.
 144              */
 145             if (type == EF_SHIP)
 146                 shp_nav(unit_list, minmob, maxmob, together, player->cnum);
 147             else
 148                 lnd_mar(unit_list, minmob, maxmob, together, player->cnum);
 149             if (QEMPTY(unit_list)) {
 150                 pr("No %s left\n",
 151                     type == EF_SHIP ? "ships" : "lands");
 152                 if (strlen(pathtaken) > 0) {
 153                     pathtaken[strlen(pathtaken) - 1] = '\0';
 154                     if (type == EF_SHIP && strlen(pathtaken) > 0)
 155                         pr("Path taken: %s\n", pathtaken);
 156                 }
 157                 return RET_OK;
 158             }
 159             leader = get_leader(unit_list);
 160             if (leader->uid != leader_uid) {
 161                 leader_uid = leader->uid;
 162                 pr_leader_change(leader);
 163                 stopping = 1;
 164                 continue;
 165             }
 166             if (type == EF_SHIP) {
 167                 if (!(cp = shp_path(*together, (struct shpstr *)leader,
 168                                     buf)))
 169                     cp = buf;
 170             } else {
 171                 if (!(cp = lnd_path(*together, (struct lndstr *)leader,
 172                                     buf)))
 173                     cp = buf;
 174             }
 175         }
 176         if (type == EF_SHIP) {
 177             radmapnopr(leader->x, leader->y, (int)leader->effic,
 178                        (int)techfact(leader->tech,
 179                                      mchr[(int)leader->type].m_vrnge),
 180                        (mchr[(int)leader->type].m_flags & M_SONAR)
 181                        ? techfact(leader->tech, 1.0) : 0.0);
 182         }
 183         if (cp == NULL || *cp == '\0')
 184             cp = &dirch[DIR_STOP];
 185         dir = chkdir(*cp, DIR_STOP, DIR_LAST);
 186         if (dir >= 0) {
 187             if (type == EF_SHIP) {
 188                 stopping |= shp_nav_one_sector(unit_list, dir,
 189                     player->cnum, *together);
 190                 if (stopping != 2) {
 191                     *pt++ = dirch[dir];
 192                     *pt = '\0';
 193                 }
 194             } else
 195                 stopping |=
 196                     lnd_mar_one_sector(unit_list, dir, player->cnum,
 197                         *together);
 198             cp++;
 199             continue;
 200         }
 201         ac = parse(cp, player->argp, NULL, scanspace, NULL);
 202         if (ac <= 1) {
 203             sprintf(dp, "%d", leader->uid);
 204             player->argp[1] = dp;
 205             cp++;
 206         } else
 207             cp = NULL;
 208         bmap_flag = 0;
 209         switch (*player->argp[0]) {
 210         case 'B':
 211             bmap_flag = 'b';
 212             /*
 213              * fall through
 214              */
 215         case 'M':
 216             do_map(bmap_flag, leader->ef_type, player->argp[1],
 217                 player->argp[2]);
 218             skip = 1;
 219             continue;
 220         case 'f':
 221             if (ac <= 1)
 222                 switch_leader(unit_list, -1);
 223             else
 224                 switch_leader(unit_list, atoi(player->argp[1]));
 225             leader = get_leader(unit_list);
 226             if (leader->uid != leader_uid) {
 227                 leader_uid = leader->uid;
 228                 pr_leader_change(leader);
 229             }
 230             continue;
 231         case 'i':
 232             if (type == EF_SHIP)
 233                 shp_list(unit_list);
 234             else
 235                 lnd_list(unit_list);
 236             continue;
 237         case 'm':
 238             if (type == EF_SHIP)
 239                 stopping |= shp_sweep(unit_list, 1, 1, player->cnum);
 240             else {
 241                 lnd_sweep(unit_list, 1, 1, player->cnum);
 242                 stopping |= lnd_check_mines(unit_list);
 243             }
 244             continue;
 245         case 'r':
 246             radar(leader->ef_type);
 247             skip = 1;
 248             player->btused++;
 249             continue;
 250         case 'l':
 251             do_look(type);
 252             player->btused++;
 253             continue;
 254         case 's':
 255             if (leader->ef_type != EF_SHIP)
 256                 break;
 257             sona();
 258             player->btused++;
 259             skip = 1;
 260             continue;
 261         case 'd':
 262             if (ac == 2) {
 263                 player->argp[2] = player->argp[1];
 264                 sprintf(dp, "%d", leader->uid);
 265                 player->argp[1] = dp;
 266             }
 267             if (type == EF_SHIP)
 268                 mine();
 269             else
 270                 landmine();
 271             skip = 1;
 272             player->btused++;
 273             continue;
 274         case 'v':
 275             if (leader->ef_type != EF_SHIP)
 276                 break;
 277             shp_view(unit_list);
 278             continue;
 279         }
 280         direrr("`%c' to stop",
 281             type == EF_SHIP ? ", `%c' to view" : NULL, NULL);
 282         pr(", `i' to list %s, `f' to change %s,\n",
 283             type == EF_SHIP ? "ships" : "units",
 284             type == EF_SHIP ? "flagship" : "leader");
 285         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 286             type == EF_SHIP ? "`s' to sonar, " : "");
 287         pr("`d' to drop mines, and `m' to minesweep\n");
 288         stopping = 1;
 289     }
 290     if (strlen(pathtaken) > 0) {
 291         pathtaken[strlen(pathtaken) - 1] = '\0';
 292         if (type == EF_SHIP && strlen(pathtaken) > 0)
 293             pr("Path taken: %s\n", pathtaken);
 294     }
 295     return RET_OK;
 296 }
 297
 298 int
 299 nav_map(int x, int y, int show_designations)
 300 {
 301     char *ptr;
 302     struct nstr_sect ns;
 303     struct natstr *np;
 304     struct sctstr sect;
 305     struct range range;
 306     int i;
 307     /* Note this is not re-entrant anyway, so we keep the buffers
 308        around */
 309     static unsigned char *bitmap = NULL;
 310     static char *wmapbuf = NULL;
 311     static char **wmap = NULL;
 312     int changed = 0;
 313
 314     if (!wmapbuf)
 315         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 316     if (!wmap) {
 317         wmap = malloc(WORLD_Y * sizeof(*wmap));
 318         if (wmap && wmapbuf) {
 319             for (i = 0; i < WORLD_Y; i++)
 320                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 321         } else if (wmap) {
 322             free(wmap);
 323             wmap = NULL;
 324         }
 325     }
 326     if (!bitmap)
 327         bitmap = malloc((WORLD_X * WORLD_Y) / 8);
 328     if (!wmapbuf || !wmap || !bitmap) {
 329         pr("Memory error, tell the deity.\n");
 330         logerror("malloc failed in navi\n");
 331         return RET_FAIL;
 332     }
 333     memset(bitmap, 0, (WORLD_X * WORLD_Y) / 8);
 334     snxtsct_dist(&ns, x, y, 1);
 335     np = getnatp(player->cnum);
 336     xyrelrange(np, &ns.range, &range);
 337     blankfill(wmapbuf, &ns.range, 1);
 338     while (nxtsct(&ns, &sect)) {
 339         ptr = &wmap[ns.dy][ns.dx];
 340         *ptr = dchr[sect.sct_type].d_mnem;
 341         if (!show_designations &&
 342             sect.sct_own != player->cnum &&
 343             sect.sct_type != SCT_WATER &&
 344             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 345             *ptr = '?';
 346         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 347         /*
 348          * We do it this way so that 'x' and 'X'
 349          * bdesignations will show up. This can
 350          * be used to mark mined sectors. So, the
 351          * player will see the current des, UNLESS
 352          * they've marked the sector 'x' or 'X',
 353          * in which case they'll see that.
 354          * --ts
 355          */
 356         *ptr = player->bmap[sctoff(sect.sct_x, sect.sct_y)];
 357     }
 358     if (changed)
 359         writemap(player->cnum);
 360     for (i = 0; i < ns.range.height; i++)
 361         pr("%s\n", wmap[i]);
 362     return RET_OK;
 363 }
 364
 365 static void
 366 pr_leader_change(struct empobj *leader)
 367 {
 368     pr("Changing %s to %s\n",
 369         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 370         obj_nameof(leader));
 371 }
 372
 373 static struct empobj *
 374 get_leader(struct emp_qelem *list)
 375 {
 376     return &((struct ulist *)(list->q_back))->unit.gen;
 377 }
 378
 379 static void
 380 switch_leader(struct emp_qelem *list, int uid)
 381 {
 382     struct emp_qelem *qp, *save;
 383     struct ulist *ulp;
 384
 385     if (QEMPTY(list))
 386         return;
 387
 388     save = qp = list->q_back;
 389     do {
 390         emp_remque(qp);
 391         emp_insque(qp, list);
 392         qp = list->q_back;
 393         ulp = (struct ulist *)qp;
 394         if (ulp->unit.gen.uid == uid || uid == -1)
 395             break;
 396     } while (list->q_back != save);
 397 }