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
  54     if (!snxtitem(&ni_ship, EF_SHIP, player->argp[1], NULL))
  55         return RET_SYN;
  56     shp_sel(&ni_ship, &ship_list);
  57     shp_nav(&ship_list, &minmob, &maxmob, player->cnum);
  58     if (QEMPTY(&ship_list)) {
  59         pr("No ships\n");
  60         return RET_FAIL;
  61     }
  62     return do_unit_move(&ship_list, &minmob, &maxmob);
  63 }
  64
  65 int
  66 do_unit_move(struct emp_qelem *ulist, double *minmob, double *maxmob)
  67 {
  68     char *cp = NULL;
  69     int leader_uid;
  70     struct empobj *leader;
  71     int dir;
  72     int stopping = 0;
  73     int skip = 0;
  74     int moved = 0;
  75     char buf[1024];
  76     char prompt[128];
  77     char bmap_flag;
  78     int ac;
  79     int type;
  80
  81     leader = get_leader(ulist);
  82     leader_uid = leader->uid;
  83     type = leader->ef_type;
  84     pr("%s is %s\n",
  85         type == EF_SHIP ? "Flagship" : "Leader",
  86         unit_nameof(leader));
  87
  88     if (player->argp[2]) {
  89         strcpy(buf, player->argp[2]);
  90         cp = unit_path(leader, buf, sizeof(buf));
  91     }
  92
  93     while (!QEMPTY(ulist)) {
  94         char dp[80];
  95
  96         if (cp == NULL || *cp == '\0' || stopping) {
  97             stopping = 0;
  98             if (type == EF_SHIP)
  99                 shp_nav(ulist, minmob, maxmob, player->cnum);
 100             else
 101                 lnd_mar(ulist, minmob, maxmob, player->cnum);
 102             if (QEMPTY(ulist)) {
 103                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 104                 return RET_OK;
 105             }
 106             leader = get_leader(ulist);
 107             if (leader->uid != leader_uid) {
 108                 leader_uid = leader->uid;
 109                 pr_leader_change(leader);
 110                 stopping = 1;
 111                 continue;
 112             }
 113             if (!skip)
 114                 nav_map(leader->x, leader->y,
 115                         type == EF_SHIP
 116                         ? !(mchr[(int)leader->type].m_flags & M_SUB) : 1);
 117             else
 118                 skip = 0;
 119             sprintf(prompt, "<%.1f:%.1f: %s> ", *maxmob,
 120                     *minmob, xyas(leader->x, leader->y, player->cnum));
 121             cp = getstring(prompt, buf);
 122             /* Just in case any of our units were shelled while we were
 123              * at the prompt, we call shp_nav() or lnd_mar() again.
 124              */
 125             if (type == EF_SHIP)
 126                 shp_nav(ulist, minmob, maxmob, player->cnum);
 127             else
 128                 lnd_mar(ulist, minmob, maxmob, player->cnum);
 129             if (QEMPTY(ulist)) {
 130                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 131                 return RET_OK;
 132             }
 133             leader = get_leader(ulist);
 134             if (leader->uid != leader_uid) {
 135                 leader_uid = leader->uid;
 136                 pr_leader_change(leader);
 137                 stopping = 1;
 138                 continue;
 139             }
 140             if (cp)
 141                 cp = unit_path(leader, buf, sizeof(buf));
 142         }
 143         if (type == EF_SHIP) {
 144             rad_map_set(player->cnum, leader->x, leader->y, leader->effic,
 145                         leader->tech, mchr[leader->type].m_vrnge);
 146         }
 147         if (cp == NULL || *cp == '\0')
 148             cp = &dirch[DIR_STOP];
 149         dir = chkdir(*cp, DIR_STOP, DIR_LAST);
 150         if (dir >= 0) {
 151             if (type == EF_SHIP)
 152                 stopping |= shp_nav_one_sector(ulist, dir, player->cnum);
 153             else {
 154                 if (!moved && !lnd_abandon_askyn(ulist))
 155                     return RET_FAIL;
 156                 stopping |= lnd_mar_one_sector(ulist, dir, player->cnum);
 157             }
 158             moved = 1;
 159             cp++;
 160             continue;
 161         }
 162         ac = parse(cp, player->argbuf, player->argp, NULL, NULL, NULL);
 163         if (ac <= 0) {
 164             player->argp[0] = "";
 165             cp = NULL;
 166         } else if (ac == 1) {
 167             sprintf(dp, "%d", leader->uid);
 168             player->argp[1] = dp;
 169             cp++;
 170         } else
 171             cp = NULL;
 172         bmap_flag = 0;
 173         switch (*player->argp[0]) {
 174         case 'B':
 175             bmap_flag = 'b';
 176             /*
 177              * fall through
 178              */
 179         case 'M':
 180             display_region_map(bmap_flag, type, leader->x, leader->y,
 181                                player->argp[1], player->argp[2]);
 182             skip = 1;
 183             continue;
 184         case 'f':
 185             if (ac <= 1)
 186                 switch_leader(ulist, -1);
 187             else
 188                 switch_leader(ulist, atoi(player->argp[1]));
 189             leader = get_leader(ulist);
 190             if (leader->uid != leader_uid) {
 191                 leader_uid = leader->uid;
 192                 pr_leader_change(leader);
 193             }
 194             continue;
 195         case 'i':
 196             unit_list(ulist);
 197             continue;
 198         case 'm':
 199             if (type == EF_SHIP)
 200                 stopping |= shp_sweep(ulist, 1, 1, player->cnum);
 201             else {
 202                 stopping |= lnd_sweep(ulist, 1, 1, player->cnum);
 203             }
 204             continue;
 205         case 'r':
 206             radar(leader->ef_type);
 207             skip = 1;
 208             player->btused++;
 209             continue;
 210         case 'l':
 211             do_look(type);
 212             player->btused++;
 213             continue;
 214         case 's':
 215             if (leader->ef_type != EF_SHIP)
 216                 break;
 217             sona();
 218             player->btused++;
 219             skip = 1;
 220             continue;
 221         case 'd':
 222             if (ac < 3) {
 223                 player->argp[2] = ac < 2 ? "1" : player->argp[1];
 224                 sprintf(dp, "%d", leader->uid);
 225                 player->argp[1] = dp;
 226             }
 227             if (type == EF_SHIP)
 228                 mine();
 229             else
 230                 landmine();
 231             stopping = 1;
 232             skip = 1;
 233             player->btused++;
 234             continue;
 235         case 'v':
 236             unit_view(ulist);
 237             continue;
 238         }
 239         direrr("`%c' to stop", ", `%c' to view", NULL);
 240         pr(", `i' to list %s, `f' to change %s,\n",
 241             type == EF_SHIP ? "ships" : "units",
 242             type == EF_SHIP ? "flagship" : "leader");
 243         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 244             type == EF_SHIP ? "`s' to sonar, " : "");
 245         pr("`d' to drop mines, and `m' to minesweep\n");
 246         stopping = 1;
 247     }
 248     return RET_OK;
 249 }
 250
 251 int
 252 nav_map(int x, int y, int show_designations)
 253 {
 254     char *ptr;
 255     struct nstr_sect ns;
 256     struct sctstr sect;
 257     int i;
 258     /* Note this is not re-entrant anyway, so we keep the buffers
 259        around */
 260     static char *wmapbuf = NULL;
 261     static char **wmap = NULL;
 262     int changed = 0;
 263
 264     if (!wmapbuf)
 265         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 266     if (!wmap) {
 267         wmap = malloc(WORLD_Y * sizeof(*wmap));
 268         if (wmap && wmapbuf) {
 269             for (i = 0; i < WORLD_Y; i++)
 270                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 271         } else if (wmap) {
 272             free(wmap);
 273             wmap = NULL;
 274         }
 275     }
 276     if (!wmapbuf || !wmap) {
 277         pr("Memory error, tell the deity.\n");
 278         logerror("malloc failed in navi\n");
 279         return RET_FAIL;
 280     }
 281     snxtsct_dist(&ns, x, y, 1);
 282     blankfill(wmapbuf, &ns.range, 1);
 283     while (nxtsct(&ns, &sect)) {
 284         ptr = &wmap[ns.dy][ns.dx];
 285         *ptr = dchr[sect.sct_type].d_mnem;
 286         if (!show_designations &&
 287             sect.sct_own != player->cnum &&
 288             sect.sct_type != SCT_WATER &&
 289             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 290             *ptr = '?';
 291         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 292         /*
 293          * We do it this way so that 'x' and 'X'
 294          * bdesignations will show up. This can
 295          * be used to mark mined sectors. So, the
 296          * player will see the current des, UNLESS
 297          * they've marked the sector 'x' or 'X',
 298          * in which case they'll see that.
 299          * --ts
 300          */
 301         *ptr = player->bmap[sect.sct_uid];
 302     }
 303     if (changed)
 304         writemap(player->cnum);
 305     for (i = 0; i < ns.range.height; i++)
 306         pr("%s\n", wmap[i]);
 307     return RET_OK;
 308 }
 309
 310 static void
 311 pr_leader_change(struct empobj *leader)
 312 {
 313     pr("Changing %s to %s\n",
 314         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 315         unit_nameof(leader));
 316 }
 317
 318 static struct empobj *
 319 get_leader(struct emp_qelem *list)
 320 {
 321     return &((struct ulist *)(list->q_back))->unit.gen;
 322 }
 323
 324 static void
 325 switch_leader(struct emp_qelem *list, int uid)
 326 {
 327     struct emp_qelem *qp, *save;
 328     struct ulist *ulp;
 329
 330     if (QEMPTY(list))
 331         return;
 332
 333     save = qp = list->q_back;
 334     do {
 335         emp_remque(qp);
 336         emp_insque(qp, list);
 337         qp = list->q_back;
 338         ulp = (struct ulist *)qp;
 339         if (ulp->unit.gen.uid == uid || uid == -1)
 340             break;
 341     } while (list->q_back != save);
 342 }