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) 1986-2014, 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, 2006-2014
  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     int moved = 0;
  78     char buf[1024];
  79     char prompt[128];
  80     char bmap_flag;
  81     int ac;
  82     int type;
  83
  84     leader = get_leader(ulist);
  85     leader_uid = leader->uid;
  86     type = leader->ef_type;
  87     pr("%s is %s\n",
  88         type == EF_SHIP ? "Flagship" : "Leader",
  89         unit_nameof(leader));
  90
  91     if (player->argp[2]) {
  92         strcpy(buf, player->argp[2]);
  93         cp = unit_path(*together, leader, buf, sizeof(buf));
  94     }
  95
  96     while (!QEMPTY(ulist)) {
  97         char dp[80];
  98
  99         if (cp == NULL || *cp == '\0' || stopping) {
 100             stopping = 0;
 101             if (type == EF_SHIP)
 102                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 103             else
 104                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 105             if (QEMPTY(ulist)) {
 106                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 107                 return RET_OK;
 108             }
 109             leader = get_leader(ulist);
 110             if (leader->uid != leader_uid) {
 111                 leader_uid = leader->uid;
 112                 pr_leader_change(leader);
 113                 stopping = 1;
 114                 continue;
 115             }
 116             if (!skip)
 117                 nav_map(leader->x, leader->y,
 118                         type == EF_SHIP
 119                         ? !(mchr[(int)leader->type].m_flags & M_SUB) : 1);
 120             else
 121                 skip = 0;
 122             sprintf(prompt, "<%.1f:%.1f: %s> ", *maxmob,
 123                     *minmob, xyas(leader->x, leader->y, player->cnum));
 124             cp = getstring(prompt, buf);
 125             /* Just in case any of our units were shelled while we were
 126              * at the prompt, we call shp_nav() or lnd_mar() again.
 127              */
 128             if (type == EF_SHIP)
 129                 shp_nav(ulist, minmob, maxmob, together, player->cnum);
 130             else
 131                 lnd_mar(ulist, minmob, maxmob, together, player->cnum);
 132             if (QEMPTY(ulist)) {
 133                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 134                 return RET_OK;
 135             }
 136             leader = get_leader(ulist);
 137             if (leader->uid != leader_uid) {
 138                 leader_uid = leader->uid;
 139                 pr_leader_change(leader);
 140                 stopping = 1;
 141                 continue;
 142             }
 143             if (cp)
 144                 cp = unit_path(*together, leader, buf, sizeof(buf));
 145         }
 146         if (type == EF_SHIP) {
 147             rad_map_set(player->cnum, leader->x, leader->y, leader->effic,
 148                         leader->tech, mchr[leader->type].m_vrnge);
 149         }
 150         if (cp == NULL || *cp == '\0')
 151             cp = &dirch[DIR_STOP];
 152         dir = chkdir(*cp, DIR_STOP, DIR_LAST);
 153         if (dir >= 0) {
 154             if (type == EF_SHIP)
 155                 stopping |= shp_nav_one_sector(ulist, dir,
 156                                                player->cnum, *together);
 157             else {
 158                 if (!moved && !lnd_abandon_askyn(ulist))
 159                     return RET_FAIL;
 160                 stopping |=
 161                     lnd_mar_one_sector(ulist, dir, player->cnum,
 162                                        *together);
 163             }
 164             moved = 1;
 165             cp++;
 166             continue;
 167         }
 168         ac = parse(cp, player->argbuf, player->argp, NULL, NULL, NULL);
 169         if (ac <= 0) {
 170             player->argp[0] = "";
 171             cp = NULL;
 172         } else if (ac == 1) {
 173             sprintf(dp, "%d", leader->uid);
 174             player->argp[1] = dp;
 175             cp++;
 176         } else
 177             cp = NULL;
 178         bmap_flag = 0;
 179         switch (*player->argp[0]) {
 180         case 'B':
 181             bmap_flag = 'b';
 182             /*
 183              * fall through
 184              */
 185         case 'M':
 186             display_region_map(bmap_flag, type, leader->x, leader->y,
 187                                player->argp[1], player->argp[2]);
 188             skip = 1;
 189             continue;
 190         case 'f':
 191             if (ac <= 1)
 192                 switch_leader(ulist, -1);
 193             else
 194                 switch_leader(ulist, atoi(player->argp[1]));
 195             leader = get_leader(ulist);
 196             if (leader->uid != leader_uid) {
 197                 leader_uid = leader->uid;
 198                 pr_leader_change(leader);
 199             }
 200             continue;
 201         case 'i':
 202             unit_list(ulist);
 203             continue;
 204         case 'm':
 205             if (type == EF_SHIP)
 206                 stopping |= shp_sweep(ulist, 1, 1, player->cnum);
 207             else {
 208                 lnd_sweep(ulist, 1, 1, player->cnum);
 209                 stopping |= lnd_check_mines(ulist);
 210             }
 211             continue;
 212         case 'r':
 213             radar(leader->ef_type);
 214             skip = 1;
 215             player->btused++;
 216             continue;
 217         case 'l':
 218             do_look(type);
 219             player->btused++;
 220             continue;
 221         case 's':
 222             if (leader->ef_type != EF_SHIP)
 223                 break;
 224             sona();
 225             player->btused++;
 226             skip = 1;
 227             continue;
 228         case 'd':
 229             if (ac < 3) {
 230                 player->argp[2] = ac < 2 ? "1" : player->argp[1];
 231                 sprintf(dp, "%d", leader->uid);
 232                 player->argp[1] = dp;
 233             }
 234             if (type == EF_SHIP)
 235                 mine();
 236             else
 237                 landmine();
 238             stopping = 1;
 239             skip = 1;
 240             player->btused++;
 241             continue;
 242         case 'v':
 243             unit_view(ulist);
 244             continue;
 245         }
 246         direrr("`%c' to stop", ", `%c' to view", NULL);
 247         pr(", `i' to list %s, `f' to change %s,\n",
 248             type == EF_SHIP ? "ships" : "units",
 249             type == EF_SHIP ? "flagship" : "leader");
 250         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 251             type == EF_SHIP ? "`s' to sonar, " : "");
 252         pr("`d' to drop mines, and `m' to minesweep\n");
 253         stopping = 1;
 254     }
 255     return RET_OK;
 256 }
 257
 258 int
 259 nav_map(int x, int y, int show_designations)
 260 {
 261     char *ptr;
 262     struct nstr_sect ns;
 263     struct sctstr sect;
 264     int i;
 265     /* Note this is not re-entrant anyway, so we keep the buffers
 266        around */
 267     static char *wmapbuf = NULL;
 268     static char **wmap = NULL;
 269     int changed = 0;
 270
 271     if (!wmapbuf)
 272         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 273     if (!wmap) {
 274         wmap = malloc(WORLD_Y * sizeof(*wmap));
 275         if (wmap && wmapbuf) {
 276             for (i = 0; i < WORLD_Y; i++)
 277                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 278         } else if (wmap) {
 279             free(wmap);
 280             wmap = NULL;
 281         }
 282     }
 283     if (!wmapbuf || !wmap) {
 284         pr("Memory error, tell the deity.\n");
 285         logerror("malloc failed in navi\n");
 286         return RET_FAIL;
 287     }
 288     snxtsct_dist(&ns, x, y, 1);
 289     blankfill(wmapbuf, &ns.range, 1);
 290     while (nxtsct(&ns, &sect)) {
 291         ptr = &wmap[ns.dy][ns.dx];
 292         *ptr = dchr[sect.sct_type].d_mnem;
 293         if (!show_designations &&
 294             sect.sct_own != player->cnum &&
 295             sect.sct_type != SCT_WATER &&
 296             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 297             *ptr = '?';
 298         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 299         /*
 300          * We do it this way so that 'x' and 'X'
 301          * bdesignations will show up. This can
 302          * be used to mark mined sectors. So, the
 303          * player will see the current des, UNLESS
 304          * they've marked the sector 'x' or 'X',
 305          * in which case they'll see that.
 306          * --ts
 307          */
 308         *ptr = player->bmap[sect.sct_uid];
 309     }
 310     if (changed)
 311         writemap(player->cnum);
 312     for (i = 0; i < ns.range.height; i++)
 313         pr("%s\n", wmap[i]);
 314     return RET_OK;
 315 }
 316
 317 static void
 318 pr_leader_change(struct empobj *leader)
 319 {
 320     pr("Changing %s to %s\n",
 321         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 322         unit_nameof(leader));
 323 }
 324
 325 static struct empobj *
 326 get_leader(struct emp_qelem *list)
 327 {
 328     return &((struct ulist *)(list->q_back))->unit.gen;
 329 }
 330
 331 static void
 332 switch_leader(struct emp_qelem *list, int uid)
 333 {
 334     struct emp_qelem *qp, *save;
 335     struct ulist *ulp;
 336
 337     if (QEMPTY(list))
 338         return;
 339
 340     save = qp = list->q_back;
 341     do {
 342         emp_remque(qp);
 343         emp_insque(qp, list);
 344         qp = list->q_back;
 345         ulp = (struct ulist *)qp;
 346         if (ulp->unit.gen.uid == uid || uid == -1)
 347             break;
 348     } while (list->q_back != save);
 349 }