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) 1986-2011, Dave Pare, Jeff Bailey, Thomas Ruschak,
   4  *                Ken Stevens, Steve McClure, Markus Armbruster
   5  *
   6  *  Empire 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 3 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, see <http://www.gnu.org/licenses/>.
  18  *
  19  *  ---
  20  *
  21  *  See files README, COPYING and CREDITS in the root of the source
  22  *  tree for related information and legal notices.  It is expected
  23  *  that future projects/authors will amend these files as needed.
  24  *
  25  *  ---
  26  *
  27  *  navi.c: Navigate ships and such
  28  *
  29  *  Known contributors to this file:
  30  *     Ken Stevens, 1995 (rewritten)
  31  *     Ron Koenderink, 2006-2007
  32  */
  33
  34 #include <config.h>
  35
  36 #include "commands.h"
  37 #include "map.h"
  38 #include "optlist.h"
  39 #include "path.h"
  40 #include "empobj.h"
  41 #include "unit.h"
  42
  43 static void pr_leader_change(struct empobj *leader);
  44 static struct empobj *get_leader(struct emp_qelem *list);
  45 static void switch_leader(struct emp_qelem *list, int uid);
  46
  47 int
  48 navi(void)
  49 {
  50     struct nstr_item ni_ship;
  51     struct emp_qelem ship_list;
  52     double minmob, maxmob;
  53     int together;
  54
  55     if (!snxtitem(&ni_ship, EF_SHIP, player->argp[1], NULL))
  56         return RET_SYN;
  57     shp_sel(&ni_ship, &ship_list);
  58     shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
  59     if (QEMPTY(&ship_list)) {
  60         pr("No ships\n");
  61         return RET_FAIL;
  62     }
  63
  64     return do_unit_move(&ship_list, &together, &minmob, &maxmob);
  65 }
  66
  67 int
  68 do_unit_move(struct emp_qelem *ulist, int *together,
  69              double *minmob, double *maxmob)
  70 {
  71     char *cp = NULL;
  72     int leader_uid;
  73     struct empobj *leader;
  74     int dir;
  75     int stopping = 0;
  76     int skip = 0;
  77     char buf[1024];
  78     char prompt[128];
  79     char scanspace[1024];
  80     char pathtaken[1024];  /* Doubtful we'll have a path longer than this */
  81     char *pt = pathtaken;
  82     char bmap_flag;
  83     int ac;
  84     int type;
  85
  86     leader = get_leader(ulist);
  87     leader_uid = leader->uid;
  88     type = leader->ef_type;
  89     pr("%s is %s\n",
  90         type == EF_SHIP ? "Flagship" : "Leader",
  91         obj_nameof(leader));
  92
  93     if (player->argp[2]) {
  94         strcpy(buf, player->argp[2]);
  95         if (!(cp = unit_path(*together, leader, buf)))
  96             cp = player->argp[2];
  97     }
  98
  99     *pt = '\0';
 100     while (!QEMPTY(ulist)) {
 101         char dp[80];
 102
 103         if (cp == NULL || *cp == '\0' || stopping) {
 104             stopping = 0;
 105             if (type == EF_SHIP)
 106                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 107             else
 108                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 109             if (QEMPTY(ulist)) {
 110                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 111                 if (type == EF_SHIP && strlen(pathtaken) > 1) {
 112                     pathtaken[strlen(pathtaken) - 1] = '\0';
 113                     pr("Path taken: %s\n", pathtaken);
 114                 }
 115                 return RET_OK;
 116             }
 117             leader = get_leader(ulist);
 118             if (leader->uid != leader_uid) {
 119                 leader_uid = leader->uid;
 120                 pr_leader_change(leader);
 121                 stopping = 1;
 122                 continue;
 123             }
 124             if (!skip)
 125                 nav_map(leader->x, leader->y,
 126                         type == EF_SHIP
 127                         ? !(mchr[(int)leader->type].m_flags & M_SUB) : 1);
 128             else
 129                 skip = 0;
 130             sprintf(prompt, "<%.1f:%.1f: %s> ", *maxmob,
 131                     *minmob, xyas(leader->x, leader->y, player->cnum));
 132             cp = getstring(prompt, buf);
 133             /* Just in case any of our units were shelled while we were
 134              * at the prompt, we call shp_nav() or lnd_mar() again.
 135              */
 136             if (type == EF_SHIP)
 137                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 138             else
 139                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 140             if (QEMPTY(ulist)) {
 141                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 142                 if (type == EF_SHIP && strlen(pathtaken) > 1) {
 143                     pathtaken[strlen(pathtaken) - 1] = '\0';
 144                     pr("Path taken: %s\n", pathtaken);
 145                 }
 146                 return RET_OK;
 147             }
 148             leader = get_leader(ulist);
 149             if (leader->uid != leader_uid) {
 150                 leader_uid = leader->uid;
 151                 pr_leader_change(leader);
 152                 stopping = 1;
 153                 continue;
 154             }
 155             if (!(cp = unit_path(*together, leader, buf)))
 156                 cp = buf;
 157         }
 158         if (type == EF_SHIP) {
 159             rad_map_set(player->cnum, leader->x, leader->y, leader->effic,
 160                         leader->tech, mchr[leader->type].m_vrnge);
 161         }
 162         if (cp == NULL || *cp == '\0')
 163             cp = &dirch[DIR_STOP];
 164         dir = chkdir(*cp, DIR_STOP, DIR_LAST);
 165         if (dir >= 0) {
 166             if (type == EF_SHIP) {
 167                 stopping |= shp_nav_one_sector(ulist, dir,
 168                                                player->cnum, *together);
 169                 if (stopping != 2) {
 170                     *pt++ = dirch[dir];
 171                     *pt = '\0';
 172                 }
 173             } else
 174                 stopping |=
 175                     lnd_mar_one_sector(ulist, dir, player->cnum,
 176                                        *together);
 177             cp++;
 178             continue;
 179         }
 180         ac = parse(cp, scanspace, player->argp, NULL, NULL, NULL);
 181         if (ac <= 0) {
 182             player->argp[0] = "";
 183             cp = NULL;
 184         } else if (ac == 1) {
 185             sprintf(dp, "%d", leader->uid);
 186             player->argp[1] = dp;
 187             cp++;
 188         } else
 189             cp = NULL;
 190         bmap_flag = 0;
 191         switch (*player->argp[0]) {
 192         case 'B':
 193             bmap_flag = 'b';
 194             /*
 195              * fall through
 196              */
 197         case 'M':
 198             do_map(bmap_flag, leader->ef_type, player->argp[1],
 199                    player->argp[2]);
 200             skip = 1;
 201             continue;
 202         case 'f':
 203             if (ac <= 1)
 204                 switch_leader(ulist, -1);
 205             else
 206                 switch_leader(ulist, atoi(player->argp[1]));
 207             leader = get_leader(ulist);
 208             if (leader->uid != leader_uid) {
 209                 leader_uid = leader->uid;
 210                 pr_leader_change(leader);
 211             }
 212             continue;
 213         case 'i':
 214             unit_list(ulist);
 215             continue;
 216         case 'm':
 217             if (type == EF_SHIP)
 218                 stopping |= shp_sweep(ulist, 1, 1, player->cnum);
 219             else {
 220                 lnd_sweep(ulist, 1, 1, player->cnum);
 221                 stopping |= lnd_check_mines(ulist);
 222             }
 223             continue;
 224         case 'r':
 225             radar(leader->ef_type);
 226             skip = 1;
 227             player->btused++;
 228             continue;
 229         case 'l':
 230             do_look(type);
 231             player->btused++;
 232             continue;
 233         case 's':
 234             if (leader->ef_type != EF_SHIP)
 235                 break;
 236             sona();
 237             player->btused++;
 238             skip = 1;
 239             continue;
 240         case 'd':
 241             if (ac < 3) {
 242                 player->argp[2] = ac < 2 ? "1" : player->argp[1];
 243                 sprintf(dp, "%d", leader->uid);
 244                 player->argp[1] = dp;
 245             }
 246             if (type == EF_SHIP)
 247                 mine();
 248             else
 249                 landmine();
 250             stopping = 1;
 251             skip = 1;
 252             player->btused++;
 253             continue;
 254         case 'v':
 255             unit_view(ulist);
 256             continue;
 257         }
 258         direrr("`%c' to stop", ", `%c' to view", NULL);
 259         pr(", `i' to list %s, `f' to change %s,\n",
 260             type == EF_SHIP ? "ships" : "units",
 261             type == EF_SHIP ? "flagship" : "leader");
 262         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 263             type == EF_SHIP ? "`s' to sonar, " : "");
 264         pr("`d' to drop mines, and `m' to minesweep\n");
 265         stopping = 1;
 266     }
 267     if (type == EF_SHIP && strlen(pathtaken) > 1) {
 268         pathtaken[strlen(pathtaken) - 1] = '\0';
 269         pr("Path taken: %s\n", pathtaken);
 270     }
 271     return RET_OK;
 272 }
 273
 274 int
 275 nav_map(int x, int y, int show_designations)
 276 {
 277     char *ptr;
 278     struct nstr_sect ns;
 279     struct sctstr sect;
 280     int i;
 281     /* Note this is not re-entrant anyway, so we keep the buffers
 282        around */
 283     static char *wmapbuf = NULL;
 284     static char **wmap = NULL;
 285     int changed = 0;
 286
 287     if (!wmapbuf)
 288         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 289     if (!wmap) {
 290         wmap = malloc(WORLD_Y * sizeof(*wmap));
 291         if (wmap && wmapbuf) {
 292             for (i = 0; i < WORLD_Y; i++)
 293                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 294         } else if (wmap) {
 295             free(wmap);
 296             wmap = NULL;
 297         }
 298     }
 299     if (!wmapbuf || !wmap) {
 300         pr("Memory error, tell the deity.\n");
 301         logerror("malloc failed in navi\n");
 302         return RET_FAIL;
 303     }
 304     snxtsct_dist(&ns, x, y, 1);
 305     blankfill(wmapbuf, &ns.range, 1);
 306     while (nxtsct(&ns, &sect)) {
 307         ptr = &wmap[ns.dy][ns.dx];
 308         *ptr = dchr[sect.sct_type].d_mnem;
 309         if (!show_designations &&
 310             sect.sct_own != player->cnum &&
 311             sect.sct_type != SCT_WATER &&
 312             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 313             *ptr = '?';
 314         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 315         /*
 316          * We do it this way so that 'x' and 'X'
 317          * bdesignations will show up. This can
 318          * be used to mark mined sectors. So, the
 319          * player will see the current des, UNLESS
 320          * they've marked the sector 'x' or 'X',
 321          * in which case they'll see that.
 322          * --ts
 323          */
 324         *ptr = player->bmap[sect.sct_uid];
 325     }
 326     if (changed)
 327         writemap(player->cnum);
 328     for (i = 0; i < ns.range.height; i++)
 329         pr("%s\n", wmap[i]);
 330     return RET_OK;
 331 }
 332
 333 static void
 334 pr_leader_change(struct empobj *leader)
 335 {
 336     pr("Changing %s to %s\n",
 337         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 338         obj_nameof(leader));
 339 }
 340
 341 static struct empobj *
 342 get_leader(struct emp_qelem *list)
 343 {
 344     return &((struct ulist *)(list->q_back))->unit.gen;
 345 }
 346
 347 static void
 348 switch_leader(struct emp_qelem *list, int uid)
 349 {
 350     struct emp_qelem *qp, *save;
 351     struct ulist *ulp;
 352
 353     if (QEMPTY(list))
 354         return;
 355
 356     save = qp = list->q_back;
 357     do {
 358         emp_remque(qp);
 359         emp_insque(qp, list);
 360         qp = list->q_back;
 361         ulp = (struct ulist *)qp;
 362         if (ulp->unit.gen.uid == uid || uid == -1)
 363             break;
 364     } while (list->q_back != save);
 365 }