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 = 1;
  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, player->cnum);
  59     if (QEMPTY(&ship_list)) {
  60         pr("No ships\n");
  61         return RET_FAIL;
  62     }
  63     return do_unit_move(&ship_list, &together, &minmob, &maxmob);
  64 }
  65
  66 int
  67 do_unit_move(struct emp_qelem *ulist, int *together,
  68              double *minmob, double *maxmob)
  69 {
  70     char *cp = NULL;
  71     int leader_uid;
  72     struct empobj *leader;
  73     int dir;
  74     int stopping = 0;
  75     int skip = 0;
  76     int moved = 0;
  77     char buf[1024];
  78     char prompt[128];
  79     char bmap_flag;
  80     int ac;
  81     int type;
  82
  83     leader = get_leader(ulist);
  84     leader_uid = leader->uid;
  85     type = leader->ef_type;
  86     pr("%s is %s\n",
  87         type == EF_SHIP ? "Flagship" : "Leader",
  88         unit_nameof(leader));
  89
  90     if (player->argp[2]) {
  91         strcpy(buf, player->argp[2]);
  92         cp = unit_path(*together, leader, buf, sizeof(buf));
  93     }
  94
  95     while (!QEMPTY(ulist)) {
  96         char dp[80];
  97
  98         if (cp == NULL || *cp == '\0' || stopping) {
  99             stopping = 0;
 100             if (type == EF_SHIP)
 101                 shp_nav(ulist, minmob, maxmob, player->cnum);
 102             else
 103                 lnd_mar(ulist, minmob, maxmob, player->cnum);
 104             if (QEMPTY(ulist)) {
 105                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 106                 return RET_OK;
 107             }
 108             leader = get_leader(ulist);
 109             if (leader->uid != leader_uid) {
 110                 leader_uid = leader->uid;
 111                 pr_leader_change(leader);
 112                 stopping = 1;
 113                 continue;
 114             }
 115             if (!skip)
 116                 nav_map(leader->x, leader->y,
 117                         type == EF_SHIP
 118                         ? !(mchr[(int)leader->type].m_flags & M_SUB) : 1);
 119             else
 120                 skip = 0;
 121             sprintf(prompt, "<%.1f:%.1f: %s> ", *maxmob,
 122                     *minmob, xyas(leader->x, leader->y, player->cnum));
 123             cp = getstring(prompt, buf);
 124             /* Just in case any of our units were shelled while we were
 125              * at the prompt, we call shp_nav() or lnd_mar() again.
 126              */
 127             if (type == EF_SHIP)
 128                 shp_nav(ulist, minmob, maxmob, player->cnum);
 129             else
 130                 lnd_mar(ulist, minmob, maxmob, player->cnum);
 131             if (QEMPTY(ulist)) {
 132                 pr("No %s left\n", type == EF_SHIP ? "ships" : "lands");
 133                 return RET_OK;
 134             }
 135             leader = get_leader(ulist);
 136             if (leader->uid != leader_uid) {
 137                 leader_uid = leader->uid;
 138                 pr_leader_change(leader);
 139                 stopping = 1;
 140                 continue;
 141             }
 142             if (cp)
 143                 cp = unit_path(*together, leader, buf, sizeof(buf));
 144         }
 145         if (type == EF_SHIP) {
 146             rad_map_set(player->cnum, leader->x, leader->y, leader->effic,
 147                         leader->tech, mchr[leader->type].m_vrnge);
 148         }
 149         if (cp == NULL || *cp == '\0')
 150             cp = &dirch[DIR_STOP];
 151         dir = chkdir(*cp, DIR_STOP, DIR_LAST);
 152         if (dir >= 0) {
 153             if (type == EF_SHIP)
 154                 stopping |= shp_nav_one_sector(ulist, dir, player->cnum);
 155             else {
 156                 if (!moved && !lnd_abandon_askyn(ulist))
 157                     return RET_FAIL;
 158                 stopping |= lnd_mar_one_sector(ulist, dir, player->cnum);
 159             }
 160             moved = 1;
 161             cp++;
 162             continue;
 163         }
 164         ac = parse(cp, player->argbuf, player->argp, NULL, NULL, NULL);
 165         if (ac <= 0) {
 166             player->argp[0] = "";
 167             cp = NULL;
 168         } else if (ac == 1) {
 169             sprintf(dp, "%d", leader->uid);
 170             player->argp[1] = dp;
 171             cp++;
 172         } else
 173             cp = NULL;
 174         bmap_flag = 0;
 175         switch (*player->argp[0]) {
 176         case 'B':
 177             bmap_flag = 'b';
 178             /*
 179              * fall through
 180              */
 181         case 'M':
 182             display_region_map(bmap_flag, type, leader->x, leader->y,
 183                                player->argp[1], player->argp[2]);
 184             skip = 1;
 185             continue;
 186         case 'f':
 187             if (ac <= 1)
 188                 switch_leader(ulist, -1);
 189             else
 190                 switch_leader(ulist, atoi(player->argp[1]));
 191             leader = get_leader(ulist);
 192             if (leader->uid != leader_uid) {
 193                 leader_uid = leader->uid;
 194                 pr_leader_change(leader);
 195             }
 196             continue;
 197         case 'i':
 198             unit_list(ulist);
 199             continue;
 200         case 'm':
 201             if (type == EF_SHIP)
 202                 stopping |= shp_sweep(ulist, 1, 1, player->cnum);
 203             else {
 204                 lnd_sweep(ulist, 1, 1, player->cnum);
 205                 stopping |= lnd_check_mines(ulist);
 206             }
 207             continue;
 208         case 'r':
 209             radar(leader->ef_type);
 210             skip = 1;
 211             player->btused++;
 212             continue;
 213         case 'l':
 214             do_look(type);
 215             player->btused++;
 216             continue;
 217         case 's':
 218             if (leader->ef_type != EF_SHIP)
 219                 break;
 220             sona();
 221             player->btused++;
 222             skip = 1;
 223             continue;
 224         case 'd':
 225             if (ac < 3) {
 226                 player->argp[2] = ac < 2 ? "1" : player->argp[1];
 227                 sprintf(dp, "%d", leader->uid);
 228                 player->argp[1] = dp;
 229             }
 230             if (type == EF_SHIP)
 231                 mine();
 232             else
 233                 landmine();
 234             stopping = 1;
 235             skip = 1;
 236             player->btused++;
 237             continue;
 238         case 'v':
 239             unit_view(ulist);
 240             continue;
 241         }
 242         direrr("`%c' to stop", ", `%c' to view", NULL);
 243         pr(", `i' to list %s, `f' to change %s,\n",
 244             type == EF_SHIP ? "ships" : "units",
 245             type == EF_SHIP ? "flagship" : "leader");
 246         pr("`r' to radar, %s`l' to look, `M' to map, `B' to bmap,\n",
 247             type == EF_SHIP ? "`s' to sonar, " : "");
 248         pr("`d' to drop mines, and `m' to minesweep\n");
 249         stopping = 1;
 250     }
 251     return RET_OK;
 252 }
 253
 254 int
 255 nav_map(int x, int y, int show_designations)
 256 {
 257     char *ptr;
 258     struct nstr_sect ns;
 259     struct sctstr sect;
 260     int i;
 261     /* Note this is not re-entrant anyway, so we keep the buffers
 262        around */
 263     static char *wmapbuf = NULL;
 264     static char **wmap = NULL;
 265     int changed = 0;
 266
 267     if (!wmapbuf)
 268         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 269     if (!wmap) {
 270         wmap = malloc(WORLD_Y * sizeof(*wmap));
 271         if (wmap && wmapbuf) {
 272             for (i = 0; i < WORLD_Y; i++)
 273                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 274         } else if (wmap) {
 275             free(wmap);
 276             wmap = NULL;
 277         }
 278     }
 279     if (!wmapbuf || !wmap) {
 280         pr("Memory error, tell the deity.\n");
 281         logerror("malloc failed in navi\n");
 282         return RET_FAIL;
 283     }
 284     snxtsct_dist(&ns, x, y, 1);
 285     blankfill(wmapbuf, &ns.range, 1);
 286     while (nxtsct(&ns, &sect)) {
 287         ptr = &wmap[ns.dy][ns.dx];
 288         *ptr = dchr[sect.sct_type].d_mnem;
 289         if (!show_designations &&
 290             sect.sct_own != player->cnum &&
 291             sect.sct_type != SCT_WATER &&
 292             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 293             *ptr = '?';
 294         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 295         /*
 296          * We do it this way so that 'x' and 'X'
 297          * bdesignations will show up. This can
 298          * be used to mark mined sectors. So, the
 299          * player will see the current des, UNLESS
 300          * they've marked the sector 'x' or 'X',
 301          * in which case they'll see that.
 302          * --ts
 303          */
 304         *ptr = player->bmap[sect.sct_uid];
 305     }
 306     if (changed)
 307         writemap(player->cnum);
 308     for (i = 0; i < ns.range.height; i++)
 309         pr("%s\n", wmap[i]);
 310     return RET_OK;
 311 }
 312
 313 static void
 314 pr_leader_change(struct empobj *leader)
 315 {
 316     pr("Changing %s to %s\n",
 317         leader->ef_type == EF_SHIP ? "flagship" : "leader",
 318         unit_nameof(leader));
 319 }
 320
 321 static struct empobj *
 322 get_leader(struct emp_qelem *list)
 323 {
 324     return &((struct ulist *)(list->q_back))->unit.gen;
 325 }
 326
 327 static void
 328 switch_leader(struct emp_qelem *list, int uid)
 329 {
 330     struct emp_qelem *qp, *save;
 331     struct ulist *ulp;
 332
 333     if (QEMPTY(list))
 334         return;
 335
 336     save = qp = list->q_back;
 337     do {
 338         emp_remque(qp);
 339         emp_insque(qp, list);
 340         qp = list->q_back;
 341         ulp = (struct ulist *)qp;
 342         if (ulp->unit.gen.uid == uid || uid == -1)
 343             break;
 344     } while (list->q_back != save);
 345 }