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) 1986-2010, 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     int 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 <= 0) {
 188             player->argp[0] = "";
 189             cp = NULL;
 190         } else if (ac == 1) {
 191             sprintf(dp, "%d", leader->uid);
 192             player->argp[1] = dp;
 193             cp++;
 194         } else
 195             cp = NULL;
 196         bmap_flag = 0;
 197         switch (*player->argp[0]) {
 198         case 'B':
 199             bmap_flag = 'b';
 200             /*
 201              * fall through
 202              */
 203         case 'M':
 204             do_map(bmap_flag, leader->ef_type, player->argp[1],
 205                    player->argp[2]);
 206             skip = 1;
 207             continue;
 208         case 'f':
 209             if (ac <= 1)
 210                 switch_leader(ulist, -1);
 211             else
 212                 switch_leader(ulist, atoi(player->argp[1]));
 213             leader = get_leader(ulist);
 214             if (leader->uid != leader_uid) {
 215                 leader_uid = leader->uid;
 216                 pr_leader_change(leader);
 217             }
 218             continue;
 219         case 'i':
 220             unit_list(ulist);
 221             continue;
 222         case 'm':
 223             if (type == EF_SHIP)
 224                 stopping |= shp_sweep(ulist, 1, 1, player->cnum);
 225             else {
 226                 lnd_sweep(ulist, 1, 1, player->cnum);
 227                 stopping |= lnd_check_mines(ulist);
 228             }
 229             continue;
 230         case 'r':
 231             radar(leader->ef_type);
 232             skip = 1;
 233             player->btused++;
 234             continue;
 235         case 'l':
 236             do_look(type);
 237             player->btused++;
 238             continue;
 239         case 's':
 240             if (leader->ef_type != EF_SHIP)
 241                 break;
 242             sona();
 243             player->btused++;
 244             skip = 1;
 245             continue;
 246         case 'd':
 247             if (ac < 3) {
 248                 player->argp[2] = ac < 2 ? "1" : player->argp[1];
 249                 sprintf(dp, "%d", leader->uid);
 250                 player->argp[1] = dp;
 251             }
 252             if (type == EF_SHIP)
 253                 mine();
 254             else
 255                 landmine();
 256             skip = 1;
 257             player->btused++;
 258             continue;
 259         case 'v':
 260             unit_view(ulist);
 261             continue;
 262         }
 263         direrr("`%c' to stop", ", `%c' to view", NULL);
 264         pr(", `i' to list %s, `f' to change %s,\n",
 265             type == EF_SHIP ? "ships" : "units",
 266             type == EF_SHIP ? "flagship" : "leader");
 267         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 268             type == EF_SHIP ? "`s' to sonar, " : "");
 269         pr("`d' to drop mines, and `m' to minesweep\n");
 270         stopping = 1;
 271     }
 272     if (type == EF_SHIP && strlen(pathtaken) > 1) {
 273         pathtaken[strlen(pathtaken) - 1] = '\0';
 274         pr("Path taken: %s\n", pathtaken);
 275     }
 276     return RET_OK;
 277 }
 278
 279 int
 280 nav_map(int x, int y, int show_designations)
 281 {
 282     char *ptr;
 283     struct nstr_sect ns;
 284     struct sctstr sect;
 285     int i;
 286     /* Note this is not re-entrant anyway, so we keep the buffers
 287        around */
 288     static char *wmapbuf = NULL;
 289     static char **wmap = NULL;
 290     int changed = 0;
 291
 292     if (!wmapbuf)
 293         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 294     if (!wmap) {
 295         wmap = malloc(WORLD_Y * sizeof(*wmap));
 296         if (wmap && wmapbuf) {
 297             for (i = 0; i < WORLD_Y; i++)
 298                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 299         } else if (wmap) {
 300             free(wmap);
 301             wmap = NULL;
 302         }
 303     }
 304     if (!wmapbuf || !wmap) {
 305         pr("Memory error, tell the deity.\n");
 306         logerror("malloc failed in navi\n");
 307         return RET_FAIL;
 308     }
 309     snxtsct_dist(&ns, x, y, 1);
 310     blankfill(wmapbuf, &ns.range, 1);
 311     while (nxtsct(&ns, &sect)) {
 312         ptr = &wmap[ns.dy][ns.dx];
 313         *ptr = dchr[sect.sct_type].d_mnem;
 314         if (!show_designations &&
 315             sect.sct_own != player->cnum &&
 316             sect.sct_type != SCT_WATER &&
 317             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 318             *ptr = '?';
 319         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 320         /*
 321          * We do it this way so that 'x' and 'X'
 322          * bdesignations will show up. This can
 323          * be used to mark mined sectors. So, the
 324          * player will see the current des, UNLESS
 325          * they've marked the sector 'x' or 'X',
 326          * in which case they'll see that.
 327          * --ts
 328          */
 329         *ptr = player->bmap[sect.sct_uid];
 330     }
 331     if (changed)
 332         writemap(player->cnum);
 333     for (i = 0; i < ns.range.height; i++)
 334         pr("%s\n", wmap[i]);
 335     return RET_OK;
 336 }
 337
 338 static void
 339 pr_leader_change(struct empobj *leader)
 340 {
 341     pr("Changing %s to %s\n",
 342         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 343         obj_nameof(leader));
 344 }
 345
 346 static struct empobj *
 347 get_leader(struct emp_qelem *list)
 348 {
 349     return &((struct ulist *)(list->q_back))->unit.gen;
 350 }
 351
 352 static void
 353 switch_leader(struct emp_qelem *list, int uid)
 354 {
 355     struct emp_qelem *qp, *save;
 356     struct ulist *ulp;
 357
 358     if (QEMPTY(list))
 359         return;
 360
 361     save = qp = list->q_back;
 362     do {
 363         emp_remque(qp);
 364         emp_insque(qp, list);
 365         qp = list->q_back;
 366         ulp = (struct ulist *)qp;
 367         if (ulp->unit.gen.uid == uid || uid == -1)
 368             break;
 369     } while (list->q_back != save);
 370 }