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) 1986-2009, 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 "commands.h"
  38 #include "map.h"
  39 #include "optlist.h"
  40 #include "path.h"
  41 #include "empobj.h"
  42 #include "unit.h"
  43
  44 static void pr_leader_change(struct empobj *leader);
  45 static struct empobj *get_leader(struct emp_qelem *list);
  46 static void switch_leader(struct emp_qelem *list, int uid);
  47
  48 int
  49 navi(void)
  50 {
  51     struct nstr_item ni_ship;
  52     struct emp_qelem ship_list;
  53     double minmob, maxmob;
  54     int together;
  55
  56     if (!snxtitem(&ni_ship, EF_SHIP, player->argp[1], NULL))
  57         return RET_SYN;
  58     shp_sel(&ni_ship, &ship_list);
  59     shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
  60     if (QEMPTY(&ship_list)) {
  61         pr("No ships\n");
  62         return RET_FAIL;
  63     }
  64
  65     return do_unit_move(&ship_list, &together, &minmob, &maxmob);
  66 }
  67
  68 int
  69 do_unit_move(struct emp_qelem *ulist, int *together,
  70              double *minmob, double *maxmob)
  71 {
  72     char *cp = NULL;
  73     int leader_uid;
  74     struct empobj *leader;
  75     int dir;
  76     int stopping = 0;
  77     int skip = 0;
  78     char buf[1024];
  79     char prompt[128];
  80     char scanspace[1024];
  81     char pathtaken[1024];  /* Doubtful we'll have a path longer than this */
  82     char *pt = pathtaken;
  83     char bmap_flag;
  84     int ac;
  85     short type;
  86
  87     leader = get_leader(ulist);
  88     leader_uid = leader->uid;
  89     type = leader->ef_type;
  90     pr("%s is %s\n",
  91         type == EF_SHIP ? "Flagship" : "Leader",
  92         obj_nameof(leader));
  93
  94     if (player->argp[2]) {
  95         strcpy(buf, player->argp[2]);
  96         if (!(cp = unit_path(*together, leader, buf)))
  97             cp = player->argp[2];
  98     }
  99
 100     *pt = '\0';
 101     while (!QEMPTY(ulist)) {
 102         char dp[80];
 103
 104         if (cp == NULL || *cp == '\0' || stopping) {
 105             stopping = 0;
 106             if (type == EF_SHIP)
 107                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 108             else
 109                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 110             if (QEMPTY(ulist)) {
 111                 pr("No %s left\n",
 112                     type == EF_SHIP ? "ships" : "lands");
 113                 if (type == EF_SHIP && strlen(pathtaken) > 1) {
 114                     pathtaken[strlen(pathtaken) - 1] = '\0';
 115                     pr("Path taken: %s\n", pathtaken);
 116                 }
 117                 return RET_OK;
 118             }
 119             leader = get_leader(ulist);
 120             if (leader->uid != leader_uid) {
 121                 leader_uid = leader->uid;
 122                 pr_leader_change(leader);
 123                 stopping = 1;
 124                 continue;
 125             }
 126             if (!skip)
 127                 nav_map(leader->x, leader->y,
 128                         type == EF_SHIP ?
 129                             !(mchr[(int)leader->type].m_flags & M_SUB) : 1);
 130             else
 131                 skip = 0;
 132             sprintf(prompt, "<%.1f:%.1f: %s> ", *maxmob,
 133                     *minmob, xyas(leader->x, leader->y, player->cnum));
 134             cp = getstring(prompt, buf);
 135             /* Just in case any of our units were shelled while we were
 136              * at the prompt, we call shp_nav() or lnd_mar() again.
 137              */
 138             if (type == EF_SHIP)
 139                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 140             else
 141                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 142             if (QEMPTY(ulist)) {
 143                 pr("No %s left\n",
 144                     type == EF_SHIP ? "ships" : "lands");
 145                 if (type == EF_SHIP && strlen(pathtaken) > 1) {
 146                     pathtaken[strlen(pathtaken) - 1] = '\0';
 147                     pr("Path taken: %s\n", pathtaken);
 148                 }
 149                 return RET_OK;
 150             }
 151             leader = get_leader(ulist);
 152             if (leader->uid != leader_uid) {
 153                 leader_uid = leader->uid;
 154                 pr_leader_change(leader);
 155                 stopping = 1;
 156                 continue;
 157             }
 158             if (!(cp = unit_path(*together, leader, buf)))
 159                 cp = buf;
 160         }
 161         if (type == EF_SHIP) {
 162             radmapnopr(leader->x, leader->y, (int)leader->effic,
 163                        (int)techfact(leader->tech,
 164                                      mchr[(int)leader->type].m_vrnge),
 165                        (mchr[(int)leader->type].m_flags & M_SONAR)
 166                        ? techfact(leader->tech, 1.0) : 0.0);
 167         }
 168         if (cp == NULL || *cp == '\0')
 169             cp = &dirch[DIR_STOP];
 170         dir = chkdir(*cp, DIR_STOP, DIR_LAST);
 171         if (dir >= 0) {
 172             if (type == EF_SHIP) {
 173                 stopping |= shp_nav_one_sector(ulist, dir,
 174                     player->cnum, *together);
 175                 if (stopping != 2) {
 176                     *pt++ = dirch[dir];
 177                     *pt = '\0';
 178                 }
 179             } else
 180                 stopping |=
 181                     lnd_mar_one_sector(ulist, dir, player->cnum,
 182                         *together);
 183             cp++;
 184             continue;
 185         }
 186         ac = parse(cp, scanspace, player->argp, NULL, NULL, NULL);
 187         if (ac <= 1) {
 188             sprintf(dp, "%d", leader->uid);
 189             player->argp[1] = dp;
 190             cp++;
 191         } else
 192             cp = NULL;
 193         bmap_flag = 0;
 194         switch (*player->argp[0]) {
 195         case 'B':
 196             bmap_flag = 'b';
 197             /*
 198              * fall through
 199              */
 200         case 'M':
 201             do_map(bmap_flag, leader->ef_type, player->argp[1],
 202                    player->argp[2]);
 203             skip = 1;
 204             continue;
 205         case 'f':
 206             if (ac <= 1)
 207                 switch_leader(ulist, -1);
 208             else
 209                 switch_leader(ulist, atoi(player->argp[1]));
 210             leader = get_leader(ulist);
 211             if (leader->uid != leader_uid) {
 212                 leader_uid = leader->uid;
 213                 pr_leader_change(leader);
 214             }
 215             continue;
 216         case 'i':
 217             unit_list(ulist);
 218             continue;
 219         case 'm':
 220             if (type == EF_SHIP)
 221                 stopping |= shp_sweep(ulist, 1, 1, player->cnum);
 222             else {
 223                 lnd_sweep(ulist, 1, 1, player->cnum);
 224                 stopping |= lnd_check_mines(ulist);
 225             }
 226             continue;
 227         case 'r':
 228             radar(leader->ef_type);
 229             skip = 1;
 230             player->btused++;
 231             continue;
 232         case 'l':
 233             do_look(type);
 234             player->btused++;
 235             continue;
 236         case 's':
 237             if (leader->ef_type != EF_SHIP)
 238                 break;
 239             sona();
 240             player->btused++;
 241             skip = 1;
 242             continue;
 243         case 'd':
 244             if (ac == 2) {
 245                 player->argp[2] = player->argp[1];
 246                 sprintf(dp, "%d", leader->uid);
 247                 player->argp[1] = dp;
 248             }
 249             if (type == EF_SHIP)
 250                 mine();
 251             else
 252                 landmine();
 253             skip = 1;
 254             player->btused++;
 255             continue;
 256         case 'v':
 257             unit_view(ulist);
 258             continue;
 259         }
 260         direrr("`%c' to stop", ", `%c' to view", NULL);
 261         pr(", `i' to list %s, `f' to change %s,\n",
 262             type == EF_SHIP ? "ships" : "units",
 263             type == EF_SHIP ? "flagship" : "leader");
 264         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 265             type == EF_SHIP ? "`s' to sonar, " : "");
 266         pr("`d' to drop mines, and `m' to minesweep\n");
 267         stopping = 1;
 268     }
 269     if (type == EF_SHIP && strlen(pathtaken) > 1) {
 270         pathtaken[strlen(pathtaken) - 1] = '\0';
 271         pr("Path taken: %s\n", pathtaken);
 272     }
 273     return RET_OK;
 274 }
 275
 276 int
 277 nav_map(int x, int y, int show_designations)
 278 {
 279     char *ptr;
 280     struct nstr_sect ns;
 281     struct natstr *np;
 282     struct sctstr sect;
 283     int i;
 284     /* Note this is not re-entrant anyway, so we keep the buffers
 285        around */
 286     static char *wmapbuf = NULL;
 287     static char **wmap = NULL;
 288     int changed = 0;
 289
 290     if (!wmapbuf)
 291         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 292     if (!wmap) {
 293         wmap = malloc(WORLD_Y * sizeof(*wmap));
 294         if (wmap && wmapbuf) {
 295             for (i = 0; i < WORLD_Y; i++)
 296                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 297         } else if (wmap) {
 298             free(wmap);
 299             wmap = NULL;
 300         }
 301     }
 302     if (!wmapbuf || !wmap) {
 303         pr("Memory error, tell the deity.\n");
 304         logerror("malloc failed in navi\n");
 305         return RET_FAIL;
 306     }
 307     snxtsct_dist(&ns, x, y, 1);
 308     np = getnatp(player->cnum);
 309     blankfill(wmapbuf, &ns.range, 1);
 310     while (nxtsct(&ns, &sect)) {
 311         ptr = &wmap[ns.dy][ns.dx];
 312         *ptr = dchr[sect.sct_type].d_mnem;
 313         if (!show_designations &&
 314             sect.sct_own != player->cnum &&
 315             sect.sct_type != SCT_WATER &&
 316             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 317             *ptr = '?';
 318         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 319         /*
 320          * We do it this way so that 'x' and 'X'
 321          * bdesignations will show up. This can
 322          * be used to mark mined sectors. So, the
 323          * player will see the current des, UNLESS
 324          * they've marked the sector 'x' or 'X',
 325          * in which case they'll see that.
 326          * --ts
 327          */
 328         *ptr = player->bmap[sect.sct_uid];
 329     }
 330     if (changed)
 331         writemap(player->cnum);
 332     for (i = 0; i < ns.range.height; i++)
 333         pr("%s\n", wmap[i]);
 334     return RET_OK;
 335 }
 336
 337 static void
 338 pr_leader_change(struct empobj *leader)
 339 {
 340     pr("Changing %s to %s\n",
 341         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 342         obj_nameof(leader));
 343 }
 344
 345 static struct empobj *
 346 get_leader(struct emp_qelem *list)
 347 {
 348     return &((struct ulist *)(list->q_back))->unit.gen;
 349 }
 350
 351 static void
 352 switch_leader(struct emp_qelem *list, int uid)
 353 {
 354     struct emp_qelem *qp, *save;
 355     struct ulist *ulp;
 356
 357     if (QEMPTY(list))
 358         return;
 359
 360     save = qp = list->q_back;
 361     do {
 362         emp_remque(qp);
 363         emp_insque(qp, list);
 364         qp = list->q_back;
 365         ulp = (struct ulist *)qp;
 366         if (ulp->unit.gen.uid == uid || uid == -1)
 367             break;
 368     } while (list->q_back != save);
 369 }