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) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
   4  *                           Ken Stevens, Steve McClure
   5  *
   6  *  This program 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 2 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, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ---
  21  *
  22  *  See files README, COPYING and CREDITS in the root of the source
  23  *  tree for related information and legal notices.  It is expected
  24  *  that future projects/authors will amend these files as needed.
  25  *
  26  *  ---
  27  *
  28  *  navi.c: Navigate ships and such
  29  *
  30  *  Known contributors to this file:
  31  *     Ken Stevens, 1995 (rewritten)
  32  */
  33
  34 #include <config.h>
  35
  36 #include <ctype.h>
  37 #include "misc.h"
  38 #include "player.h"
  39 #include "ship.h"
  40 #include "sect.h"
  41 #include "xy.h"
  42 #include "nsc.h"
  43 #include "nat.h"
  44 #include "path.h"
  45 #include "file.h"
  46 #include "map.h"
  47 #include "commands.h"
  48 #include "optlist.h"
  49
  50 static int set_flagship(struct emp_qelem *list, struct shpstr **flagshipp);
  51 static void switch_flagship(struct emp_qelem *list, int ship_uid);
  52
  53 int
  54 navi(void)
  55 {
  56     struct nstr_item ni_ship;
  57     struct emp_qelem ship_list;
  58     double minmob, maxmob;
  59     int together;
  60     char *cp = NULL;
  61     struct shpstr *shp = NULL;  /* flagship */
  62     struct nstr_sect ns;
  63     char origin;
  64     int dir;
  65     int stopping = 0;
  66     int skip = 0;
  67     char buf[1024];
  68     char prompt[128];
  69     char scanspace[1024];
  70     char pathtaken[1024];       /* Doubtful we'll have a path longer than this */
  71     char *pt = pathtaken;
  72     char bmap_flag;
  73     int ac;
  74
  75     if (!snxtitem(&ni_ship, EF_SHIP, player->argp[1]))
  76         return RET_SYN;
  77     shp_sel(&ni_ship, &ship_list);
  78     shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
  79     if (QEMPTY(&ship_list)) {
  80         pr("No ships\n");
  81         return RET_FAIL;
  82     }
  83     set_flagship(&ship_list, &shp);
  84     if (player->argp[2]) {
  85         strcpy(buf, player->argp[2]);
  86         if (!(cp = shp_path(together, shp, buf)))
  87             cp = player->argp[2];
  88     }
  89
  90     *pt = '\0';
  91     while (!QEMPTY(&ship_list)) {
  92         char dp[80];
  93
  94         if (cp == NULL || *cp == '\0' || stopping) {
  95             stopping = 0;
  96             shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
  97             if (QEMPTY(&ship_list)) {
  98                 pr("No ships left\n");
  99                 if (strlen(pathtaken) > 0) {
 100                     pathtaken[strlen(pathtaken) - 1] = '\0';
 101                     if (strlen(pathtaken) > 0)
 102                         pr("Path taken: %s\n", pathtaken);
 103                 }
 104                 return RET_OK;
 105             }
 106             if (set_flagship(&ship_list, &shp)) {
 107                 stopping = 1;
 108                 continue;
 109             }
 110             if (!skip)
 111                 nav_map(shp->shp_x, shp->shp_y,
 112                         !(mchr[(int)shp->shp_type].m_flags & M_SUB));
 113             else
 114                 skip = 0;
 115             sprintf(prompt, "<%.1f:%.1f: %s> ", maxmob,
 116                     minmob, xyas(shp->shp_x, shp->shp_y, player->cnum));
 117             cp = getstring(prompt, buf);
 118             /* Just in case any of our ships were shelled while we were
 119              * at the prompt, we call shp_nav() again.
 120              */
 121             shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
 122             if (QEMPTY(&ship_list)) {
 123                 pr("No ships left\n");
 124                 if (strlen(pathtaken) > 0) {
 125                     pathtaken[strlen(pathtaken) - 1] = '\0';
 126                     if (strlen(pathtaken) > 0)
 127                         pr("Path taken: %s\n", pathtaken);
 128                 }
 129                 return RET_OK;
 130             }
 131             if (set_flagship(&ship_list, &shp)) {
 132                 stopping = 1;
 133                 continue;
 134             }
 135             if (cp && !(cp = shp_path(together, shp, buf)))
 136                 cp = buf;
 137         }
 138         radmapnopr(shp->shp_x, shp->shp_y, (int)shp->shp_effic,
 139                    (int)techfact(shp->shp_tech,
 140                                  mchr[(int)shp->shp_type].m_vrnge),
 141                    (mchr[(int)shp->shp_type].m_flags & M_SONAR)
 142                    ? techfact(shp->shp_tech, 1.0) : 0.0);
 143         if (cp == NULL || *cp == '\0')
 144             cp = &dirch[DIR_STOP];
 145         dir = chkdir(*cp, DIR_STOP, DIR_VIEW);
 146         if (dir >= 0) {
 147             if (dir == DIR_VIEW)
 148                 shp_view(&ship_list);
 149             else {
 150                 stopping |= shp_nav_one_sector(&ship_list, dir, player->cnum, together);
 151                 if (stopping != 2) {
 152                     *pt++ = dirch[dir];
 153                     *pt = '\0';
 154                 }
 155             }
 156             cp++;
 157             continue;
 158         }
 159         ac = parse(cp, player->argp, NULL, scanspace, NULL);
 160         if (ac <= 1) {
 161             sprintf(dp, "%d", shp->shp_uid);
 162             player->argp[1] = dp;
 163             cp++;
 164         } else
 165             cp = NULL;
 166         bmap_flag = 0;
 167         switch (*player->argp[0]) {
 168         case 'B':
 169             bmap_flag = 'b';
 170             /*
 171              * fall through
 172              */
 173         case 'M':
 174             unit_map(EF_SHIP, atoi(player->argp[1]), &ns, &origin);
 175             draw_map(bmap_flag, origin, MAP_SHIP, &ns);
 176             skip = 1;
 177             break;
 178         case 'f':
 179             if (ac <= 1)
 180                 switch_flagship(&ship_list, -1);
 181             else
 182                 switch_flagship(&ship_list, atoi(player->argp[1]));
 183             set_flagship(&ship_list, &shp);
 184             break;
 185         case 'i':
 186             shp_list(&ship_list);
 187             break;
 188         case 'm':
 189             stopping |= shp_sweep(&ship_list, 1, 0, player->cnum);
 190             break;
 191         case 'r':
 192             rada();
 193             skip = 1;
 194             player->btused++;
 195             break;
 196         case 'l':
 197             look();
 198             player->btused++;
 199             break;
 200         case 's':
 201             sona();
 202             player->btused++;
 203             skip = 1;
 204             break;
 205         case 'd':
 206             if (ac == 2) {
 207                 player->argp[2] = player->argp[1];
 208                 sprintf(dp, "%d", shp->shp_uid);
 209                 player->argp[1] = dp;
 210             }
 211             mine();
 212             skip = 1;
 213             player->btused++;
 214             break;
 215         default:
 216             direrr("`%c' to stop", ", `%c' to view, ", 0);
 217             pr("`i' to list ships, `f' to change flagship,\n");
 218             pr("`r' to radar, `s' to sonar, `l' to look, `M' to map, `B' to bmap,\n");
 219             pr("`d' to drop mines, and `m' to minesweep\n");
 220             stopping = 1;
 221         }
 222     }
 223     if (strlen(pathtaken) > 0) {
 224         pathtaken[strlen(pathtaken) - 1] = '\0';
 225         if (strlen(pathtaken) > 0)
 226             pr("Path taken: %s\n", pathtaken);
 227     }
 228     return RET_OK;
 229 }
 230
 231 int
 232 nav_map(int x, int y, int show_designations)
 233 {
 234     char *ptr;
 235     struct nstr_sect ns;
 236     struct natstr *np;
 237     struct sctstr sect;
 238     struct range range;
 239     int i;
 240     /* Note this is not re-entrant anyway, so we keep the buffers
 241        around */
 242     static unsigned char *bitmap = NULL;
 243     static char *wmapbuf = NULL;
 244     static char **wmap = NULL;
 245     int changed = 0;
 246
 247     if (!wmapbuf)
 248         wmapbuf = malloc(WORLD_Y * MAPWIDTH(1));
 249     if (!wmap) {
 250         wmap = malloc(WORLD_Y * sizeof(*wmap));
 251         if (wmap && wmapbuf) {
 252             for (i = 0; i < WORLD_Y; i++)
 253                 wmap[i] = &wmapbuf[MAPWIDTH(1) * i];
 254         } else if (wmap) {
 255             free(wmap);
 256             wmap = NULL;
 257         }
 258     }
 259     if (!bitmap)
 260         bitmap = malloc((WORLD_X * WORLD_Y) / 8);
 261     if (!wmapbuf || !wmap || !bitmap) {
 262         pr("Memory error, tell the deity.\n");
 263         logerror("malloc failed in navi\n");
 264         return RET_FAIL;
 265     }
 266     memset(bitmap, 0, (WORLD_X * WORLD_Y) / 8);
 267     snxtsct_dist(&ns, x, y, 1);
 268     np = getnatp(player->cnum);
 269     xyrelrange(np, &ns.range, &range);
 270     blankfill(wmapbuf, &ns.range, 1);
 271     while (nxtsct(&ns, &sect)) {
 272         ptr = &wmap[ns.dy][ns.dx];
 273         *ptr = dchr[sect.sct_type].d_mnem;
 274         if (!show_designations &&
 275             sect.sct_own != player->cnum &&
 276             sect.sct_type != SCT_WATER &&
 277             sect.sct_type != SCT_BSPAN && sect.sct_type != SCT_HARBR)
 278             *ptr = '?';
 279         changed += map_set(player->cnum, sect.sct_x, sect.sct_y, *ptr, 0);
 280         /*
 281          * We do it this way so that 'x' and 'X'
 282          * bdesignations will show up. This can
 283          * be used to mark mined sectors. So, the
 284          * player will see the current des, UNLESS
 285          * they've marked the sector 'x' or 'X',
 286          * in which case they'll see that.
 287          * --ts
 288          */
 289         *ptr = player->bmap[sctoff(sect.sct_x, sect.sct_y)];
 290     }
 291     if (changed)
 292         writemap(player->cnum);
 293     for (i = 0; i < ns.range.height; i++)
 294         pr("%s\n", wmap[i]);
 295     return RET_OK;
 296 }
 297
 298 static int
 299 set_flagship(struct emp_qelem *list, struct shpstr **flagshipp)
 300 {
 301     struct mlist *mlp = (struct mlist *)(list->q_back);
 302
 303     if (!*flagshipp)
 304         pr("Flagship is ");
 305     else if ((*flagshipp)->shp_uid != mlp->ship.shp_uid)
 306         pr("Changing flagship to ");
 307     else
 308         return 0;
 309     *flagshipp = &mlp->ship;
 310     pr("%s\n", prship(&mlp->ship));
 311     return 1;
 312 }
 313
 314 static void
 315 switch_flagship(struct emp_qelem *list, int ship_uid)
 316 {
 317     struct emp_qelem *qp, *save;
 318     struct mlist *mlp;
 319
 320     if (QEMPTY(list))
 321         return;
 322
 323     save = qp = list->q_back;
 324     do {
 325         emp_remque(qp);
 326         emp_insque(qp, list);
 327         qp = list->q_back;
 328         mlp = (struct mlist *)qp;
 329         if (mlp->ship.shp_uid == ship_uid || ship_uid == -1)
 330             break;
 331     } while (list->q_back != save);
 332 }
 333