git.pond.sub.org Git - empserver/blob - src/lib/update/distribute.c

   1 /*
   2  *  Empire - A multi-player, client/server Internet based war game.
   3  *  Copyright (C) 1986-2000, 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 the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
  23  *  related information and legal notices. It is expected that any future
  24  *  projects/authors will amend these files as needed.
  25  *
  26  *  ---
  27  *
  28  *  distribute.c: Do distribution to sectors
  29  *
  30  *  Known contributors to this file:
  31  *     Dave Pare, 1986
  32  *     Steve McClure, 1998
  33  */
  34
  35 #include <stdlib.h>
  36 #include "misc.h"
  37 #include "var.h"
  38 #include "nat.h"
  39 #include "sect.h"
  40 #include "item.h"
  41 #include "xy.h"
  42 #include "path.h"
  43 #include "file.h"
  44 #include "distribute.h"
  45 #include "update.h"
  46 #include "subs.h"
  47 #include "common.h"
  48
  49 int
  50 dodistribute(struct sctstr *sp, int imex, s_char *path, double dist_i_cost, double dist_e_cost)
  51           /* import or export? */
  52 {
  53         struct  sctstr *getdistsp();
  54         float   distpathcost();
  55         struct ichrstr *ip;
  56         struct sctstr *dist;
  57         int     amt;
  58         int     thresh;
  59         int     amt_dist;
  60         int     amt_sect;
  61         int     packing;
  62         float   imcost;
  63         float   excost;
  64         int     dist_packing;
  65         int     diff;
  66         int     item;
  67         int     dists[I_MAX+1];
  68         int     remote[I_MAX+1];
  69         int     local[I_MAX+1];
  70         int     changed;
  71         int     rplague;
  72         int     lplague;
  73
  74         getvec(VT_ITEM, local, (s_char *)sp, EF_SECTOR);
  75         if ((sp->sct_dist_x == sp->sct_x) && (sp->sct_dist_y == sp->sct_y))
  76                 return 0;
  77
  78         if (getvec(VT_DIST, dists, (s_char *)sp, EF_SECTOR) <= 0)
  79                 return 0;
  80
  81         if (path == (s_char *)0){
  82                 if (sp->sct_own != 0) {
  83                         if (imex == EXPORT) /* only want this once */
  84                         wu(0,sp->sct_own,"No path to dist sector for %s\n",
  85                                 ownxy(sp));
  86                 }
  87                 return 0;
  88         }
  89
  90         dist = getsectp(sp->sct_dist_x,sp->sct_dist_y);
  91         if (dist->sct_effic >= 60)
  92                 dist_packing = dchr[dist->sct_type].d_pkg;
  93         else
  94                 dist_packing = NPKG; /* No packing */
  95
  96         if (sp->sct_effic >= 60)
  97                 packing = dchr[sp->sct_type].d_pkg;
  98         else
  99                 packing = NPKG; /* No packing */
 100
 101         if ((dist->sct_effic >= 60) && dchr[dist->sct_type].d_pkg == WPKG)
 102                 packing = dchr[dist->sct_type].d_pkg;
 103
 104         getvec(VT_ITEM, remote, (s_char *)dist, EF_SECTOR);
 105         lplague = rplague = changed = 0;
 106         for (item = 1; item < I_MAX+1; item++) {
 107                 if (dists[item] == 0)
 108                         continue;
 109                 ip = &ichr[item];
 110                 thresh = dists[item];
 111                 /*
 112                  * calculate costs for importing and exporting.
 113                  * the div 10.0 is because delivering straight through
 114                  * to the dist sect is cheaper than stopping at each
 115                  * sector along the way (processor-timewise)
 116                  */
 117                 excost = (dist_e_cost/ip->i_pkg[packing] * ip->i_lbs) / 10.0;
 118                 imcost = (dist_i_cost/ip->i_pkg[dist_packing] *ip->i_lbs)/10.0;
 119                 amt_sect = local[item];
 120                 amt_dist = remote[item];
 121                 diff = amt_sect - thresh;
 122                 if (item == I_CIVIL)
 123                         if (sp->sct_own != sp->sct_oldown)
 124                                 continue;
 125                 if (item == I_CIVIL)
 126                         if (dist->sct_own != dist->sct_oldown)
 127                                 continue;
 128                 if (diff < 0){
 129                         if (imex != IMPORT)
 130                                 continue;
 131
 132                         if (!military_control(dist))
 133                                 continue;
 134
 135                         diff = -diff;
 136                         /*
 137                          * import.
 138                          * don't import if no mobility.
 139                          * check to make sure have enough mobility in the
 140                          * dist sector to import what we need.
 141                          */
 142                         if (dist->sct_mobil <= 0) {
 143                                 /*logerror("  dist mobil < 0");*/
 144                                 continue;
 145                         }
 146                         amt = diff;
 147                         if (item == I_CIVIL)
 148                                 amt_dist--;     /* Don't send your last civ */
 149
 150                         if (amt_dist < amt) {
 151                                 amt = amt_dist;
 152                                 if (amt_dist == 0)
 153                                         continue;
 154                         }
 155                         if (dist->sct_mobil < imcost * amt)
 156                                 amt = dist->sct_mobil / imcost;
 157
 158                         lplague++;
 159                         /* XXX replace with vector assign and putvec() */
 160                         remote[item] -= amt;
 161                         changed++;
 162                         dist->sct_mobil -= (int) (imcost * amt);
 163                         local[item] += amt;
 164                 } else {
 165                         if (imex != EXPORT)
 166                                 continue;
 167                         if (!military_control(sp))
 168                                 continue;
 169                         if ((item == I_CIVIL)&&(sp->sct_work < 100))
 170                                 continue;
 171                         if ((item == I_CIVIL)&&(sp->sct_own != sp->sct_oldown))
 172                                 continue;
 173                         /*
 174                          * export.
 175                          * don't export if no mobility. check to make sure we
 176                          * have mobility enough to do the right thing.
 177                          * also make sure that there's enough space in the
 178                          * target sector to hold the required amt.
 179                          */
 180                         if (sp->sct_mobil <= 0) {
 181                                 /*logerror("  sp mob is zero");*/
 182                                 continue;
 183                         }
 184                         amt = diff;
 185                         if (amt > amt_sect)
 186                                 amt = amt_sect;
 187                         if (sp->sct_mobil < excost * amt)
 188                                 amt = sp->sct_mobil / excost;
 189                         if (amt + amt_dist > 9999)
 190                                 amt = 9999 - amt_dist;
 191                         if (amt == 0)
 192                                 continue;
 193                         /* XXX replace with vector assign and putvec() */
 194
 195                         rplague++;
 196                         local[item] -= amt;
 197                         changed++;
 198                         sp->sct_mobil -= (int) (excost * amt);
 199                         remote[item] += amt;
 200                 }
 201         }
 202         putvec(VT_ITEM, remote, (s_char *)dist, EF_SECTOR);
 203         putvec(VT_ITEM, local, (s_char *)sp, EF_SECTOR);
 204
 205         if (lplague) {
 206           lplague = getvar(V_PSTAGE, (s_char *)dist, EF_SECTOR);
 207           if (lplague == PLG_INFECT &&
 208               getvar(V_PSTAGE, (s_char *)sp, EF_SECTOR) == PLG_HEALTHY) {
 209             putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)sp, EF_SECTOR);
 210           }
 211         }
 212
 213         if (rplague) {
 214           rplague = getvar(V_PSTAGE, (s_char *)sp, EF_SECTOR);
 215           if (rplague == PLG_INFECT &&
 216               getvar(V_PSTAGE, (s_char *)dist, EF_SECTOR) == PLG_HEALTHY) {
 217             putvar(V_PSTAGE, PLG_EXPOSED, (s_char *)dist, EF_SECTOR);
 218           }
 219         }
 220
 221         return changed;
 222 }
 223