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