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) 1986-2013, 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  *     Markus Armbruster, 2006-2011
  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 "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 pathtaken[1024];  /* Doubtful we'll have a path longer than this */
  80     char *pt = pathtaken;
  81     char bmap_flag;
  82     int ac;
  83     int type;
  84
  85     leader = get_leader(ulist);
  86     leader_uid = leader->uid;
  87     type = leader->ef_type;
  88     pr("%s is %s\n",
  89         type == EF_SHIP ? "Flagship" : "Leader",
  90         unit_nameof(leader));
  91
  92     if (player->argp[2]) {
  93         strcpy(buf, player->argp[2]);
  94         cp = unit_path(*together, leader, buf, sizeof(buf));
  95     }
  96
  97     *pt = '\0';
  98     while (!QEMPTY(ulist)) {
  99         char dp[80];
 100
 101         if (cp == NULL || *cp == '\0' || stopping) {
 102             stopping = 0;
 103             if (type == EF_SHIP)
 104                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 105             else
 106                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 107             if (QEMPTY(ulist)) {
 108                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 109                 if (type == EF_SHIP && strlen(pathtaken) > 1) {
 110                     pathtaken[strlen(pathtaken) - 1] = '\0';
 111                     pr("Path taken: %s\n", pathtaken);
 112                 }
 113                 return RET_OK;
 114             }
 115             leader = get_leader(ulist);
 116             if (leader->uid != leader_uid) {
 117                 leader_uid = leader->uid;
 118                 pr_leader_change(leader);
 119                 stopping = 1;
 120                 continue;
 121             }
 122             if (!skip)
 123                 nav_map(leader->x, leader->y,
 124                         type == EF_SHIP
 125                         ? !(mchr[(int)leader->type].m_flags & M_SUB) : 1);
 126             else
 127                 skip = 0;
 128             sprintf(prompt, "<%.1f:%.1f: %s> ", *maxmob,
 129                     *minmob, xyas(leader->x, leader->y, player->cnum));
 130             cp = getstring(prompt, buf);
 131             /* Just in case any of our units were shelled while we were
 132              * at the prompt, we call shp_nav() or lnd_mar() again.
 133              */
 134             if (type == EF_SHIP)
 135                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 136             else
 137                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 138             if (QEMPTY(ulist)) {
 139                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 140                 if (type == EF_SHIP && strlen(pathtaken) > 1) {
 141                     pathtaken[strlen(pathtaken) - 1] = '\0';
 142                     pr("Path taken: %s\n", pathtaken);
 143                 }
 144                 return RET_OK;
 145             }
 146             leader = get_leader(ulist);
 147             if (leader->uid != leader_uid) {
 148                 leader_uid = leader->uid;
 149                 pr_leader_change(leader);
 150                 stopping = 1;
 151                 continue;
 152             }
 153             if (cp)
 154                 cp = unit_path(*together, leader, buf, sizeof(buf));
 155         }
 156         if (type == EF_SHIP) {
 157             rad_map_set(player->cnum, leader->x, leader->y, leader->effic,
 158                         leader->tech, mchr[leader->type].m_vrnge);
 159         }
 160         if (cp == NULL || *cp == '\0')
 161             cp = &dirch[DIR_STOP];
 162         dir = chkdir(*cp, DIR_STOP, DIR_LAST);
 163         if (dir >= 0) {
 164             if (type == EF_SHIP) {
 165                 stopping |= shp_nav_one_sector(ulist, dir,
 166                                                player->cnum, *together);
 167                 if (stopping != 2) {
 168                     *pt++ = dirch[dir];
 169                     *pt = '\0';
 170                 }
 171             } else
 172                 stopping |=
 173                     lnd_mar_one_sector(ulist, dir, player->cnum,
 174                                        *together);
 175             cp++;
 176             continue;
 177         }
 178         ac = parse(cp, player->argbuf, player->argp, NULL, NULL, NULL);
 179         if (ac <= 0) {
 180             player->argp[0] = "";
 181             cp = NULL;
 182         } else if (ac == 1) {
 183             sprintf(dp, "%d", leader->uid);
 184             player->argp[1] = dp;
 185             cp++;
 186         } else
 187             cp = NULL;
 188         bmap_flag = 0;
 189         switch (*player->argp[0]) {
 190         case 'B':
 191             bmap_flag = 'b';
 192             /*
 193              * fall through
 194              */
 195         case 'M':
 196             display_region_map(bmap_flag, type, leader->x, leader->y,
 197                                player->argp[1], player->argp[2]);
 198             skip = 1;
 199             continue;
 200         case 'f':
 201             if (ac <= 1)
 202                 switch_leader(ulist, -1);
 203             else
 204                 switch_leader(ulist, atoi(player->argp[1]));
 205             leader = get_leader(ulist);
 206             if (leader->uid != leader_uid) {
 207                 leader_uid = leader->uid;
 208                 pr_leader_change(leader);
 209             }
 210             continue;
 211         case 'i':
 212             unit_list(ulist);
 213             continue;
 214         case 'm':
 215             if (type == EF_SHIP)
 216                 stopping |= shp_sweep(ulist, 1, 1, player->cnum);
 217             else {
 218                 lnd_sweep(ulist, 1, 1, player->cnum);
 219                 stopping |= lnd_check_mines(ulist);
 220             }
 221             continue;
 222         case 'r':
 223             radar(leader->ef_type);
 224             skip = 1;
 225             player->btused++;
 226             continue;
 227         case 'l':
 228             do_look(type);
 229             player->btused++;
 230             continue;
 231         case 's':
 232             if (leader->ef_type != EF_SHIP)
 233                 break;
 234             sona();
 235             player->btused++;
 236             skip = 1;
 237             continue;
 238         case 'd':
 239             if (ac < 3) {
 240                 player->argp[2] = ac < 2 ? "1" : player->argp[1];
 241                 sprintf(dp, "%d", leader->uid);
 242                 player->argp[1] = dp;
 243             }
 244             if (type == EF_SHIP)
 245                 mine();
 246             else
 247                 landmine();
 248             stopping = 1;
 249             skip = 1;
 250             player->btused++;
 251             continue;
 252         case 'v':
 253             unit_view(ulist);
 254             continue;
 255         }
 256         direrr("`%c' to stop", ", `%c' to view", NULL);
 257         pr(", `i' to list %s, `f' to change %s,\n",
 258             type == EF_SHIP ? "ships" : "units",
 259             type == EF_SHIP ? "flagship" : "leader");
 260         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 261             type == EF_SHIP ? "`s' to sonar, " : "");
 262         pr("`d' to drop mines, and `m' to minesweep\n");
 263         stopping = 1;
 264     }
 265     if (type == EF_SHIP && strlen(pathtaken) > 1) {
 266         pathtaken[strlen(pathtaken) - 1] = '\0';
 267         pr("Path taken: %s\n", pathtaken);
 268     }
 269     return RET_OK;
 270 }
 271
 272 int
 273 nav_map(int x, int y, int show_designations)
 274 {
 275     char *ptr;
 276     struct nstr_sect ns;
 277     struct sctstr sect;
 278     int i;
 279     /* Note this is not re-entrant anyway, so we keep the buffers
 280        around */
 281     static char *wmapbuf = NULL;
 282     static char **wmap = NULL;
 283     int changed = 0;
 284
 285     if (!wmapbuf)
 286         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 287     if (!wmap) {
 288         wmap = malloc(WORLD_Y * sizeof(*wmap));
 289         if (wmap && wmapbuf) {
 290             for (i = 0; i < WORLD_Y; i++)
 291                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 292         } else if (wmap) {
 293             free(wmap);
 294             wmap = NULL;
 295         }
 296     }
 297     if (!wmapbuf || !wmap) {
 298         pr("Memory error, tell the deity.\n");
 299         logerror("malloc failed in navi\n");
 300         return RET_FAIL;
 301     }
 302     snxtsct_dist(&ns, x, y, 1);
 303     blankfill(wmapbuf, &ns.range, 1);
 304     while (nxtsct(&ns, &sect)) {
 305         ptr = &wmap[ns.dy][ns.dx];
 306         *ptr = dchr[sect.sct_type].d_mnem;
 307         if (!show_designations &&
 308             sect.sct_own != player->cnum &&
 309             sect.sct_type != SCT_WATER &&
 310             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 311             *ptr = '?';
 312         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 313         /*
 314          * We do it this way so that 'x' and 'X'
 315          * bdesignations will show up. This can
 316          * be used to mark mined sectors. So, the
 317          * player will see the current des, UNLESS
 318          * they've marked the sector 'x' or 'X',
 319          * in which case they'll see that.
 320          * --ts
 321          */
 322         *ptr = player->bmap[sect.sct_uid];
 323     }
 324     if (changed)
 325         writemap(player->cnum);
 326     for (i = 0; i < ns.range.height; i++)
 327         pr("%s\n", wmap[i]);
 328     return RET_OK;
 329 }
 330
 331 static void
 332 pr_leader_change(struct empobj *leader)
 333 {
 334     pr("Changing %s to %s\n",
 335         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 336         unit_nameof(leader));
 337 }
 338
 339 static struct empobj *
 340 get_leader(struct emp_qelem *list)
 341 {
 342     return &((struct ulist *)(list->q_back))->unit.gen;
 343 }
 344
 345 static void
 346 switch_leader(struct emp_qelem *list, int uid)
 347 {
 348     struct emp_qelem *qp, *save;
 349     struct ulist *ulp;
 350
 351     if (QEMPTY(list))
 352         return;
 353
 354     save = qp = list->q_back;
 355     do {
 356         emp_remque(qp);
 357         emp_insque(qp, list);
 358         qp = list->q_back;
 359         ulp = (struct ulist *)qp;
 360         if (ulp->unit.gen.uid == uid || uid == -1)
 361             break;
 362     } while (list->q_back != save);
 363 }