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 "empobj.h"
  42 #include "unit.h"
  43
  44 int
  45 navi(void)
  46 {
  47     struct nstr_item ni_ship;
  48     struct emp_qelem ship_list;
  49     double minmob, maxmob;
  50     int together;
  51     char *cp = NULL;
  52     int leader_uid;
  53     struct empobj *leader;
  54     int dir;
  55     int stopping = 0;
  56     int skip = 0;
  57     char buf[1024];
  58     char prompt[128];
  59     char scanspace[1024];
  60     char pathtaken[1024];       /* Doubtful we'll have a path longer than this */
  61     char *pt = pathtaken;
  62     char bmap_flag;
  63     int ac;
  64
  65     if (!snxtitem(&ni_ship, EF_SHIP, player->argp[1]))
  66         return RET_SYN;
  67     shp_sel(&ni_ship, &ship_list);
  68     shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
  69     if (QEMPTY(&ship_list)) {
  70         pr("No ships\n");
  71         return RET_FAIL;
  72     }
  73     leader = get_leader(&ship_list);
  74     leader_uid = leader->uid;
  75     pr("Flagship is %s\n", obj_nameof(leader));
  76     if (player->argp[2]) {
  77         strcpy(buf, player->argp[2]);
  78         if (!(cp = shp_path(together, (struct shpstr *)leader, buf)))
  79             cp = player->argp[2];
  80     }
  81
  82     *pt = '\0';
  83     while (!QEMPTY(&ship_list)) {
  84         char dp[80];
  85
  86         if (cp == NULL || *cp == '\0' || stopping) {
  87             stopping = 0;
  88             shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
  89             if (QEMPTY(&ship_list)) {
  90                 pr("No ships left\n");
  91                 if (strlen(pathtaken) > 0) {
  92                     pathtaken[strlen(pathtaken) - 1] = '\0';
  93                     if (strlen(pathtaken) > 0)
  94                         pr("Path taken: %s\n", pathtaken);
  95                 }
  96                 return RET_OK;
  97             }
  98             leader = get_leader(&ship_list);
  99             if (leader->uid != leader_uid) {
 100                 leader_uid = leader->uid;
 101                 pr_leader_change(leader);
 102                 stopping = 1;
 103                 continue;
 104             }
 105             if (!skip)
 106                 nav_map(leader->x, leader->y,
 107                         !(mchr[(int)leader->type].m_flags & M_SUB));
 108             else
 109                 skip = 0;
 110             sprintf(prompt, "<%.1f:%.1f: %s> ", maxmob,
 111                     minmob, xyas(leader->x, leader->y, player->cnum));
 112             cp = getstring(prompt, buf);
 113             /* Just in case any of our ships were shelled while we were
 114              * at the prompt, we call shp_nav() again.
 115              */
 116             shp_nav(&ship_list, &minmob, &maxmob, &together, player->cnum);
 117             if (QEMPTY(&ship_list)) {
 118                 pr("No ships left\n");
 119                 if (strlen(pathtaken) > 0) {
 120                     pathtaken[strlen(pathtaken) - 1] = '\0';
 121                     if (strlen(pathtaken) > 0)
 122                         pr("Path taken: %s\n", pathtaken);
 123                 }
 124                 return RET_OK;
 125             }
 126             leader = get_leader(&ship_list);
 127             if (leader->uid != leader_uid) {
 128                 leader_uid = leader->uid;
 129                 pr_leader_change(leader);
 130                 stopping = 1;
 131                 continue;
 132             }
 133             if (cp && !(cp = shp_path(together, (struct shpstr *)leader, buf)))
 134                 cp = buf;
 135         }
 136         radmapnopr(leader->x, leader->y, (int)leader->effic,
 137                    (int)techfact(leader->tech,
 138                                  mchr[(int)leader->type].m_vrnge),
 139                    (mchr[(int)leader->type].m_flags & M_SONAR)
 140                    ? techfact(leader->tech, 1.0) : 0.0);
 141         if (cp == NULL || *cp == '\0')
 142             cp = &dirch[DIR_STOP];
 143         dir = chkdir(*cp, DIR_STOP, DIR_VIEW);
 144         if (dir >= 0) {
 145             if (dir == DIR_VIEW)
 146                 shp_view(&ship_list);
 147             else {
 148                 stopping |= shp_nav_one_sector(&ship_list, dir, player->cnum, together);
 149                 if (stopping != 2) {
 150                     *pt++ = dirch[dir];
 151                     *pt = '\0';
 152                 }
 153             }
 154             cp++;
 155             continue;
 156         }
 157         ac = parse(cp, player->argp, NULL, scanspace, NULL);
 158         if (ac <= 1) {
 159             sprintf(dp, "%d", leader->uid);
 160             player->argp[1] = dp;
 161             cp++;
 162         } else
 163             cp = NULL;
 164         bmap_flag = 0;
 165         switch (*player->argp[0]) {
 166         case 'B':
 167             bmap_flag = 'b';
 168             /*
 169              * fall through
 170              */
 171         case 'M':
 172             do_map(bmap_flag, EF_SHIP, player->argp[1], player->argp[2]);
 173             skip = 1;
 174             continue;
 175         case 'f':
 176             if (ac <= 1)
 177                 switch_leader(&ship_list, -1);
 178             else
 179                 switch_leader(&ship_list, atoi(player->argp[1]));
 180             leader = get_leader(&ship_list);
 181             if (leader->uid != leader_uid) {
 182                 leader_uid = leader->uid;
 183                 pr_leader_change(leader);
 184             }
 185             continue;
 186         case 'i':
 187             shp_list(&ship_list);
 188             continue;
 189         case 'm':
 190             stopping |= shp_sweep(&ship_list, 1, 1, player->cnum);
 191             continue;
 192         case 'r':
 193             radar(EF_SHIP);
 194             skip = 1;
 195             player->btused++;
 196             continue;
 197         case 'l':
 198             look();
 199             player->btused++;
 200             continue;
 201         case 's':
 202             sona();
 203             player->btused++;
 204             skip = 1;
 205             continue;
 206         case 'd':
 207             if (ac == 2) {
 208                 player->argp[2] = player->argp[1];
 209                 sprintf(dp, "%d", leader->uid);
 210                 player->argp[1] = dp;
 211             }
 212             mine();
 213             skip = 1;
 214             player->btused++;
 215             continue;
 216         }
 217         direrr("`%c' to stop", ", `%c' to view, ", 0);
 218         pr("`i' to list ships, `f' to change flagship,\n");
 219         pr("`r' to radar, `s' to sonar, `l' to look, `M' to map, `B' to bmap,\n");
 220         pr("`d' to drop mines, and `m' to minesweep\n");
 221         stopping = 1;
 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 }