]> git.pond.sub.org Git - empserver/blobdiff - src/lib/subs/retreat.c
(lnd_mobtype): New.
[empserver] / src / lib / subs / retreat.c
index 9d4a6d4cd1e7726685990d58f435faf07249794f..cbfdecc139b311c0650fa9a30852c3f6674baa28 100644 (file)
@@ -1,6 +1,6 @@
 /*
  *  Empire - A multi-player, client/server Internet based war game.
- *  Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ *  Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
  *                           Ken Stevens, Steve McClure
  *
  *  This program is free software; you can redistribute it and/or modify
@@ -19,9 +19,9 @@
  *
  *  ---
  *
- *  See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
- *  related information and legal notices. It is expected that any future
- *  projects/authors will amend these files as needed.
+ *  See files README, COPYING and CREDITS in the root of the source
+ *  tree for related information and legal notices.  It is expected
+ *  that future projects/authors will amend these files as needed.
  *
  *  ---
  *
  * 
  *  Known contributors to this file:
  *     Steve McClure, 2000
- *     
  */
 
+#include <config.h>
+
+#include <string.h>
 #include "misc.h"
 #include "player.h"
 #include "nat.h"
-#include "var.h"
 #include "retreat.h"
 #include "ship.h"
 #include "land.h"
 #include "xy.h"
 #include "nsc.h"
 #include "path.h"
-#include "deity.h"
 #include "file.h"
-#include "options.h"
 #include "damage.h"
 #include "prototypes.h"
 #include "optlist.h"
 
-struct ccode{
-       s_char  code;
-       s_char  *desc[2];
-} conditions[] = {
-       { 'i', {
-               "retreated with a damaged friend",
-               "was damaged",
-               }, },
-       { 't', {
-               "retreated with a torpedoed ship",
-               "was hit by a torpedo",
-               }, },
-       { 's', {
-               "retreated with a ship scared by sonar",
-               "detected a sonar ping",
-               }, },
-       { 'h', {
-               "retreated with a helpless ship",
-               "was fired upon with no one able to defend it",
-               }, },
-       { 'b', {
-               "retreated with a bombed friend",
-               "was bombed",
-               }, },
-       { 'd', {
-               "retreated with a depth-charged ship",
-               "was depth-charged",
-               }, },
-       { 'u', {
-               "retreated with a boared ship",
-               "was boarded",
-               }, },
-       { 0, {"",""} },
+static int findcondition(char);
+static int retreat_land1(struct lndstr *, char, int);
+static int retreat_ship1(struct shpstr *, char, int);
+
+struct ccode {
+    char code;
+    char *desc[2];
+};
+
+static struct ccode conditions[] = {
+    { 'i', { "retreated with a damaged friend",
+            "was damaged" } },
+    { 't', { "retreated with a torpedoed ship",
+            "was hit by a torpedo" } },
+    { 's', { "retreated with a ship scared by sonar",
+            "detected a sonar ping" } },
+    { 'h', { "retreated with a helpless ship",
+            "was fired upon with no one able to defend it" } },
+    { 'b', { "retreated with a bombed friend",
+            "was bombed" } },
+    { 'd', { "retreated with a depth-charged ship",
+            "was depth-charged" } },
+    { 'u', { "retreated with a boarded ship", "was boarded" } },
+    { 0,   { "panicked", "panicked"} }
 };
 
 int
 check_retreat_and_do_shipdamage(struct shpstr *sp, int dam)
 {
-       if (dam <=0)
-               return 0;
+    if (dam <= 0)
+       return 0;
 
-       shipdamage(sp,dam);
-       if (sp->shp_rflags & RET_INJURED)
-               retreat_ship(sp, 'i');
+    shipdamage(sp, dam);
+    if (sp->shp_rflags & RET_INJURED)
+       retreat_ship(sp, 'i');
 
-       return 1;
+    return 1;
 }
 
 void
-retreat_ship(struct shpstr *sp, s_char code)
+retreat_ship(struct shpstr *sp, char code)
 {
-       struct  nstr_item ni;
-       struct  shpstr ship;
-       s_char  buf[2];
-
-       if (sp->shp_rflags & RET_GROUP){
-               bzero(buf,2);
-               buf[0] = sp->shp_fleet;
-               snxtitem(&ni, EF_SHIP, buf);
-               while(nxtitem(&ni,(s_char *)&ship))
-                       if ((ship.shp_fleet == buf[0]) &&
-                           (ship.shp_own == sp->shp_own)) {
-                               if (ship.shp_uid == sp->shp_uid){
-                                       retreat_ship1(sp,code,1);
-                                       if (sp->shp_rpath[0] == 0)
-                                               sp->shp_rflags = 0;
-                               } else {
-                                       retreat_ship1(&ship,code,0);
-                                       getship(ship.shp_uid,&ship);
-                                       if (ship.shp_rpath[0] == 0){
-                                               ship.shp_rflags = 0;
-                                               putship(ship.shp_uid,&ship);
-                                       }
-                               }
-                       }
-       } else {
-               retreat_ship1(sp,code,1);
-               if (sp->shp_rpath[0] == 0)
+    struct nstr_item ni;
+    struct shpstr ship;
+
+    if (sp->shp_rflags & RET_GROUP) {
+       snxtitem_group(&ni, EF_SHIP, sp->shp_fleet);
+       while (nxtitem(&ni, &ship))
+           if (ship.shp_own == sp->shp_own) {
+               if (ship.shp_uid == sp->shp_uid) {
+                   retreat_ship1(sp, code, 1);
+                   if (sp->shp_rpath[0] == 0)
                        sp->shp_rflags = 0;
-       }
+               } else {
+                   retreat_ship1(&ship, code, 0);
+                   getship(ship.shp_uid, &ship);
+                   if (ship.shp_rpath[0] == 0) {
+                       ship.shp_rflags = 0;
+                       putship(ship.shp_uid, &ship);
+                   }
+               }
+           }
+    } else {
+       retreat_ship1(sp, code, 1);
+       if (sp->shp_rpath[0] == 0)
+           sp->shp_rflags = 0;
+    }
 }
 
-int
-retreat_ship1(struct shpstr *sp, s_char code, int orig)
-                         
-                    
-                       /* Is this the originally scared ship, or a follower */
+static int
+retreat_ship1(struct shpstr *sp, char code, int orig)
+
+
+                       /* Is this the originally scared ship, or a follower */
 {
-       extern double techfact(int, double);
-       struct sctstr sect;
-       register int n;
-       register int m;
-       int     max;
-       int     dir;
-       coord     newx;
-       coord     newy;
-       coord     dx;
-       coord     dy;
-       int     stopping;
-       int     mines;
-       int     shells;
-       double  mobcost;
-       struct mchrstr *mcp;
-       int     vec[I_MAX+1];
-       int     time_to_stop;
-       s_char  buf[RET_LEN-1];
-
-       sp->shp_mission = 0;
-       if (sp->shp_own == 0)
-               return 0;
-
-       if (isupper(code))
-               code = tolower(code);
-
-       n = 0;
-       if (sp->shp_effic < SHIP_MINEFF){
-               wu(0, sp->shp_own, "%s %s,\nbut it died in the attack, and so couldn't retreat!\n", prship(sp),
-                  conditions[findcondition(code)].desc[orig]);
-               if (!orig) putship(sp->shp_uid,sp);
-               return 0;
+    struct sctstr sect;
+    int n;
+    int m;
+    int max;
+    int dir;
+    coord newx;
+    coord newy;
+    coord dx;
+    coord dy;
+    int stopping;
+    int mines;
+    int shells;
+    double mobcost;
+    struct mchrstr *mcp;
+    int changed;
+
+    sp->shp_mission = 0;
+    if (sp->shp_own == 0)
+       return 0;
+
+    n = 0;
+    if (sp->shp_effic < SHIP_MINEFF) {
+       wu(0, sp->shp_own,
+          "%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
+          prship(sp), conditions[findcondition(code)].desc[orig]);
+       if (!orig)
+           putship(sp->shp_uid, sp);
+       return 0;
+    }
+
+    if (opt_SAIL) {
+       /* can't retreat a ship that's sailin, bad things happend */
+       if (*sp->shp_path) {
+           wu(0, sp->shp_own,
+              "%s %s,\nbut had sailing orders, and couldn't retreat!\n",
+              prship(sp), conditions[findcondition(code)].desc[orig]);
+           if (!orig)
+               putship(sp->shp_uid, sp);
+           return 0;
        }
-
-       if (opt_SAIL) {
-           /* can't retreat a ship that's sailin, bad things happend */
-           if (*sp->shp_path){
-               wu(0, sp->shp_own, "%s %s,\nbut had sailing orders, and couldn't retreat!\n", prship(sp),
-                  conditions[findcondition(code)].desc[orig]);
-               if (!orig) putship(sp->shp_uid,sp);
-               return 0;
-           }
+    }
+    /* check crew - uws don't count */
+    if (sp->shp_item[I_MILIT] == 0 && sp->shp_item[I_CIVIL] == 0) {
+       wu(0, sp->shp_own,
+          "%s %s,\nbut had no crew, and couldn't retreat!\n", prship(sp),
+          conditions[findcondition(code)].desc[orig]);
+       if (!orig)
+           putship(sp->shp_uid, sp);
+       return 0;
+    }
+
+    getsect(sp->shp_x, sp->shp_y, &sect);
+    switch (shp_check_nav(&sect, sp)) {
+    case CN_CONSTRUCTION:
+       wu(0, sp->shp_own,
+          "%s %s,\nbut was caught in a construction zone, and couldn't retreat!\n",
+          prship(sp), conditions[findcondition(code)].desc[orig]);
+       if (!orig)
+           putship(sp->shp_uid, sp);
+       return 0;
+    case CN_LANDLOCKED:
+       wu(0, sp->shp_own,
+          "%s %s,\nbut was landlocked, and couldn't retreat!\n",
+          prship(sp), conditions[findcondition(code)].desc[orig]);
+       if (!orig)
+           putship(sp->shp_uid, sp);
+       return 0;
+       /*NOTREACHED*/
+    case CN_NAVIGABLE:
+       break;
+    case CN_ERROR:
+    default:
+       wu(0, sp->shp_own,
+          "%s %s,\nbut was subject to an empire error, and couldn't retreat!\n",
+          prship(sp), conditions[findcondition(code)].desc[orig]);
+       if (!orig)
+           putship(sp->shp_uid, sp);
+       return 0;
+       /*NOTREACHED*/
+    }
+
+    if (sp->shp_mobil <= 0.0) {
+       wu(0, sp->shp_own,
+          "%s %s,\nbut had no mobility, and couldn't retreat!\n",
+          prship(sp), conditions[findcondition(code)].desc[orig]);
+       if (!orig)
+           putship(sp->shp_uid, sp);
+       return 0;
+    }
+
+    n = (-1 * MAX_RETREAT);
+    stopping = 0;
+    while (!stopping && n) {
+       dx = dy = 0;
+       if (sp->shp_rpath[0] == 0) {
+           stopping = 1;
+           continue;
        }
-       /* check crew - uws don't count */
-       getvec(VT_ITEM, vec, (s_char *)sp, EF_SHIP);
-       if (vec[I_MILIT] == 0 && vec[I_CIVIL] == 0){
-               wu(0, sp->shp_own, "%s %s,\nbut had no crew, and couldn't retreat!\n", prship(sp),
-                  conditions[findcondition(code)].desc[orig]);
-               if (!orig) putship(sp->shp_uid,sp);
-               return 0;
+       if (sp->shp_mobil <= 0.0) {
+           wu(0, sp->shp_own,
+              "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
+              prship(sp), conditions[findcondition(code)].desc[orig]);
+           if (!orig)
+               putship(sp->shp_uid, sp);
+           return 0;
        }
-
-       getsect(sp->shp_x,sp->shp_y,&sect);
-       switch (check_nav(&sect)) {
-       case CN_CONSTRUCTION:
-               wu(0, sp->shp_own, "%s %s,\nbut was caught in a construction zone, and couldn't retreat!\n", prship(sp),
-                  conditions[findcondition(code)].desc[orig]);
-                       if (!orig) putship(sp->shp_uid,sp);
-                       return 0;
-       case CN_LANDLOCKED:
-               wu(0, sp->shp_own, "%s %s,\nbut was landlocked, and couldn't retreat!\n", prship(sp),
-                  conditions[findcondition(code)].desc[orig]);
-                       if (!orig) putship(sp->shp_uid,sp);
-                       return 0;
-                       /*NOTREACHED*/
-               case CN_NAVIGABLE:
-                       break;
-               case CN_ERROR:
-       default:
-               wu(0, sp->shp_own, "%s %s,\nbut was subject to an empire error, and couldn't retreat!\n", prship(sp),
-                  conditions[findcondition(code)].desc[orig]);
-                       if (!orig) putship(sp->shp_uid,sp);
-                       return 0;
-                       /*NOTREACHED*/
+       dir = chkdir(sp->shp_rpath[0], DIR_STOP, DIR_LAST);
+       memmove(sp->shp_rpath, sp->shp_rpath+1, sizeof(sp->shp_rpath) - 1);
+       if (dir < 0)
+           continue;
+       if (dir == DIR_STOP)
+           stopping++;
+       else {
+           dx = diroff[dir][0];
+           dy = diroff[dir][1];
        }
-
-       if (sp->shp_mobil <= 0.0) {
-               wu(0, sp->shp_own, "%s %s,\nbut had no mobility, and couldn't retreat!\n", prship(sp),
-                  conditions[findcondition(code)].desc[orig]);
-               if (!orig) putship(sp->shp_uid,sp);
-               return 0;
+       n++;
+
+       mcp = &mchr[(int)sp->shp_type];
+       newx = xnorm(sp->shp_x + dx);
+       newy = ynorm(sp->shp_y + dy);
+       mobcost = shp_mobcost(sp);
+
+       getsect(newx, newy, &sect);
+       if (shp_check_nav(&sect, sp) != CN_NAVIGABLE ||
+           (sect.sct_own && sect.sct_own != sp->shp_own &&
+            getrel(getnatp(sect.sct_own), sp->shp_own) < FRIENDLY)) {
+           wu(0, sp->shp_own, "%s %s,\nbut could not retreat to %s!\n",
+              prship(sp), conditions[findcondition(code)].desc[orig],
+              xyas(newx, newy, sp->shp_own));
+           if (!orig)
+               putship(sp->shp_uid, sp);
+           return 0;
        }
-
-       n=(-1*MAX_RETREAT);
-       stopping = 0;
-       time_to_stop = 0;
-       while ((!stopping) && n){
-               dx = dy = 0;
-               if (sp->shp_rpath[0] == 0 || sp->shp_rpath[0] == 0){
-                       stopping=1;
-                       continue;
-               }
-               if (sp->shp_mobil <= 0.0) {
-                       wu(0, sp->shp_own, "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n", prship(sp),
-                          conditions[findcondition(code)].desc[orig]);
-                       if (!orig) putship(sp->shp_uid,sp);
-                       return 0;
-               }
-               dir = chkdir(sp->shp_rpath[0], DIR_STOP, DIR_VIEW);
-               bzero(buf,RET_LEN-1);
-               bcopy(&sp->shp_rpath[1],buf,RET_LEN-1);
-               bzero(sp->shp_rpath,RET_LEN);
-               bcopy(buf,sp->shp_rpath,RET_LEN-1);
-               if (dir == -1)
-                       continue;
-               if (dir == DIR_STOP)
-                       stopping++;
-               else {
-                       dx = diroff[dir][0];
-                       dy = diroff[dir][1];
+       sp->shp_x = newx;
+       sp->shp_y = newy;
+       sp->shp_mobil -= mobcost;
+       if (stopping)
+           continue;
+
+       mines = sect.sct_mines;
+       changed = 0;
+       if ((mcp->m_flags & M_SWEEP) && sect.sct_type == SCT_WATER) {
+           sp->shp_mobil -= mobcost;
+           max = mcp->m_item[I_SHELL];
+           shells = sp->shp_item[I_SHELL];
+           for (m = 0; mines > 0 && m < 5; m++) {
+               if (chance(0.66)) {
+                   mines--;
+                   shells = MIN(max, shells + 1);
+                   changed |= map_set(sp->shp_own, sp->shp_x, sp->shp_y,
+                                      'X', 0);
                }
-               n++;
-
-               mcp = &mchr[(int)sp->shp_type];
-               newx = xnorm(sp->shp_x + dx);
-               newy = ynorm(sp->shp_y + dy);
-               mobcost = sp->shp_effic * 0.01 * sp->shp_speed;
-               mobcost = 480.0 / (mobcost + techfact(sp->shp_tech, mobcost));
-
-               getsect(newx, newy, &sect);
-               if (check_nav(&sect) != CN_NAVIGABLE ||
-                           (sect.sct_own && !player->owner &&
-                            getrel(getnatp(sect.sct_own), sp->shp_own) < FRIENDLY)) {
-                       wu(0, sp->shp_own, "%s %s,\nbut could not retreat to %s!\n", prship(sp),
-                          conditions[findcondition(code)].desc[orig],
-                                       xyas(newx, newy, sp->shp_own));
-                               if (!orig) putship(sp->shp_uid,sp);
-                               return 0;
-               }
-               sp->shp_x = newx;
-               sp->shp_y = newy;
-               sp->shp_mobil -= mobcost;
-               if (stopping)
-                       continue;
-
-               mines = getvar(V_MINE, (s_char *)&sect, EF_SECTOR);
-               if ((mcp->m_flags & M_SWEEP) && mines > 0 && !player->owner) {
-                       max = vl_find(V_SHELL, mcp->m_vtype,
-                               mcp->m_vamt, (int) mcp->m_nv);
-                       shells = getvar(V_SHELL, (s_char *)sp, EF_SHIP);
-                       for (m=0; mines > 0 && m < 5; m++) {
-                               if (chance(0.66)) {
-                                       mines--;
-                                       shells = min(max, shells + 1);
-                               }
-                       }
-                       putvar(V_MINE, mines, (s_char *)&sect, EF_SECTOR);
-                       putvar(V_SHELL, shells, (s_char *)sp, EF_SHIP);
-                       putsect(&sect);
-               }
-               if (mines > 0 && !player->owner &&
-                       chance(DMINE_HITCHANCE(mines))) {
-                       wu(0, sp->shp_own, "%s %s,\nand hit a mine in %s while retreating!\n", prship(sp),
-                          conditions[findcondition(code)].desc[orig],
-                          xyas(newx, newy, sp->shp_own));
-                       nreport(sp->shp_own, N_HIT_MINE, 0, 1);
-                       m = MINE_DAMAGE();
-                       shipdamage(sp, m);
-                       mines--;
-                       putvar(V_MINE, mines, (s_char *)&sect, EF_SECTOR);
-                       putsect(&sect);
-                       if (sp->shp_effic < SHIP_MINEFF)
-                               time_to_stop = 1;
-                       if (!orig) putship(sp->shp_uid,sp);
-                       return 0;
-               }
-               if (time_to_stop)
-                       stopping = 1;
+           }
+           if (sect.sct_mines != mines) {
+               wu(0, sp->shp_own,
+                  "%s cleared %d mine%s in %s while retreating\n",
+                  prship(sp), sect.sct_mines-mines, splur(sect.sct_mines-mines),
+                  xyas(newx, newy, sp->shp_own));
+               sect.sct_mines = mines;
+               sp->shp_item[I_SHELL] = shells;
+               putsect(&sect);
+           }
+           if (changed)
+               writemap(sp->shp_own);
        }
-
-       if (orig) {
-               wu(0, sp->shp_own, "%s %s, and retreated to %s\n", prship(sp),
-                       conditions[findcondition(code)].desc[orig],
-                       xyas(sp->shp_x, sp->shp_y, sp->shp_own));
-       }else{
-               wu(0, sp->shp_own, "%s %s, and ended up at %s\n",
-                  prship(sp),
-                  conditions[findcondition(code)].desc[orig],
-                  xyas(sp->shp_x, sp->shp_y, sp->shp_own));
+       if (sect.sct_type == SCT_WATER && mines > 0
+           && chance(DMINE_HITCHANCE(mines))) {
+           wu(0, sp->shp_own,
+              "%s %s,\nand hit a mine in %s while retreating!\n",
+              prship(sp), conditions[findcondition(code)].desc[orig],
+              xyas(newx, newy, sp->shp_own));
+           nreport(sp->shp_own, N_HIT_MINE, 0, 1);
+           m = MINE_DAMAGE();
+           shipdamage(sp, m);
+           mines--;
+           if (map_set(sp->shp_own, sp->shp_x, sp->shp_y, 'X', 0))
+               writemap(sp->shp_own);
+           sect.sct_mines = mines;
+           putsect(&sect);
+           if (!orig)
+               putship(sp->shp_uid, sp);
+           return 0;
        }
-       if (!orig) putship(sp->shp_uid,sp);
-       return 1;
+    }
+
+    if (orig) {
+       wu(0, sp->shp_own, "%s %s, and retreated to %s\n",
+          prship(sp), conditions[findcondition(code)].desc[orig],
+          xyas(sp->shp_x, sp->shp_y, sp->shp_own));
+    } else {
+       wu(0, sp->shp_own, "%s %s, and ended up at %s\n",
+          prship(sp),
+          conditions[findcondition(code)].desc[orig],
+          xyas(sp->shp_x, sp->shp_y, sp->shp_own));
+    }
+    if (!orig)
+       putship(sp->shp_uid, sp);
+    return 1;
 }
 
-#if 0
-static int 
-check_nav(sect)
-       struct  sctstr *sect;
+static int
+findcondition(char code)
 {
-       extern struct dchrstr dchr[];
-
-       switch (dchr[sect->sct_type].d_flg & 03) {
-       case NAVOK:
-               break;
-
-       case NAV_02:
-               if (sect->sct_effic < 2)
-                       return CN_CONSTRUCTION;
-               break;
-       case NAV_60:
-               if (sect->sct_effic < 60)
-                       return CN_CONSTRUCTION;
-               break;
-       default:
-               return CN_LANDLOCKED;
-       }
-       return CN_NAVIGABLE;
-}
-#endif
-int
-findcondition(s_char code)
-{
-       int     x;
-
-       x=0;
-       while (conditions[x].code){
-               if (conditions[x].code == code)
-                       return(x);
-               x++;
-       }
+    int i;
 
-       return(x);
+    for (i = 0; conditions[i].code && conditions[i].code != code; i++) ;
+    CANT_HAPPEN(!conditions[i].code);
+    return i;
 }
 
 int
 check_retreat_and_do_landdamage(struct lndstr *lp, int dam)
 {
-       if (dam <=0)
-               return 0;
+    if (dam <= 0)
+       return 0;
 
-       landdamage(lp,dam);
-       if (lp->lnd_rflags & RET_INJURED)
-               retreat_land(lp, 'i');
+    landdamage(lp, dam);
+    if (lp->lnd_rflags & RET_INJURED)
+       retreat_land(lp, 'i');
 
-       return 1;
+    return 1;
 }
 
 void
-retreat_land(struct lndstr *lp, s_char code)
+retreat_land(struct lndstr *lp, char code)
 {
-       struct  nstr_item ni;
-       struct  lndstr land;
-       s_char  buf[2];
-
-       if (lp->lnd_rflags & RET_GROUP){
-               bzero(buf,2);
-               buf[0] = lp->lnd_army;
-               snxtitem(&ni, EF_SHIP, buf);
-               while(nxtitem(&ni,(s_char *)&land))
-                       if ((land.lnd_army == buf[0]) &&
-                           (land.lnd_own == lp->lnd_own)) {
-                               if (land.lnd_uid == lp->lnd_uid){
-                                       retreat_land1(lp,code,1);
-                                       if (lp->lnd_rpath[0] == 0)
-                                               lp->lnd_rflags = 0;
-                               }else{
-                                       retreat_land1(&land,code,0);
-                                       getland(land.lnd_uid,&land);
-                                       if (land.lnd_rpath[0] == 0){
-                                               land.lnd_rflags = 0;
-                                               putland(land.lnd_uid,&land);
-                                       }
-                               }
-                       }
-       }else{
-               retreat_land1(lp,code,1);
-               if (lp->lnd_rpath[0] == 0)
+    struct nstr_item ni;
+    struct lndstr land;
+
+    if (lp->lnd_rflags & RET_GROUP) {
+       snxtitem_group(&ni, EF_SHIP, lp->lnd_army);
+       while (nxtitem(&ni, &land))
+           if (land.lnd_own == lp->lnd_own) {
+               if (land.lnd_uid == lp->lnd_uid) {
+                   retreat_land1(lp, code, 1);
+                   if (lp->lnd_rpath[0] == 0)
                        lp->lnd_rflags = 0;
-       }
+               } else {
+                   retreat_land1(&land, code, 0);
+                   getland(land.lnd_uid, &land);
+                   if (land.lnd_rpath[0] == 0) {
+                       land.lnd_rflags = 0;
+                       putland(land.lnd_uid, &land);
+                   }
+               }
+           }
+    } else {
+       retreat_land1(lp, code, 1);
+       if (lp->lnd_rpath[0] == 0)
+           lp->lnd_rflags = 0;
+    }
 }
 
-int
-retreat_land1(struct lndstr *lp, s_char code, int orig)
-                         
-                    
-                       /* Is this the originally scared unit, or a follower */
-{
-       extern double techfact(int, double);
-       struct sctstr sect;
-       register int n;
-       register int m;
-       int     max;
-       int     dir;
-       coord     newx;
-       coord     newy;
-       coord     dx;
-       coord     dy;
-       int     stopping;
-       int     mines;
-       int     shells;
-       double  mobcost;
-       struct lchrstr *lcp;
-       int     time_to_stop;
-       s_char  buf[RET_LEN-1];
-
-       lp->lnd_mission = 0;
-       if (lp->lnd_own == 0)
-               return 0;
-
-       if (isupper(code))
-               code = tolower(code);
-
-       n = 0;
-       if (lp->lnd_effic < LAND_MINEFF){
-               wu(0, lp->lnd_own, "%s %s,\nbut it died in the attack, and so couldn't retreat!\n", prland(lp),
-                  conditions[findcondition(code)].desc[orig]);
-               if (!orig) putland(lp->lnd_uid,lp);
-               return 0;
-       }
+static int
+retreat_land1(struct lndstr *lp, char code, int orig)
 
-       getsect(lp->lnd_x,lp->lnd_y,&sect);
 
+                       /* Is this the originally scared unit, or a follower */
+{
+    struct sctstr sect;
+    int n;
+    int m;
+    int max;
+    int dir;
+    coord newx;
+    coord newy;
+    coord dx;
+    coord dy;
+    int stopping;
+    int mines;
+    int shells;
+    double mobcost;
+    struct lchrstr *lcp;
+
+    lp->lnd_mission = 0;
+    if (lp->lnd_own == 0)
+       return 0;
+
+    n = 0;
+    if (lp->lnd_effic < LAND_MINEFF) {
+       wu(0, lp->lnd_own,
+          "%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
+          prland(lp), conditions[findcondition(code)].desc[orig]);
+       if (!orig)
+           putland(lp->lnd_uid, lp);
+       return 0;
+    }
+
+    getsect(lp->lnd_x, lp->lnd_y, &sect);
+
+    if (lp->lnd_mobil <= 0.0) {
+       wu(0, lp->lnd_own,
+          "%s %s,\nbut had no mobility, and couldn't retreat!\n",
+          prland(lp), conditions[findcondition(code)].desc[orig]);
+       if (!orig)
+           putland(lp->lnd_uid, lp);
+       return 0;
+    }
+
+    n = (-1 * MAX_RETREAT);
+    stopping = 0;
+    while (!stopping && n) {
+       dx = dy = 0;
+       if (lp->lnd_rpath[0] == 0) {
+           stopping = 1;
+           continue;
+       }
        if (lp->lnd_mobil <= 0.0) {
-               wu(0, lp->lnd_own, "%s %s,\nbut had no mobility, and couldn't retreat!\n",
-                  prland(lp),
-                  conditions[findcondition(code)].desc[orig]);
-               if (!orig) putland(lp->lnd_uid,lp);
-               return 0;
+           wu(0, lp->lnd_own,
+              "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
+              prland(lp), conditions[findcondition(code)].desc[orig]);
+           if (!orig)
+               putland(lp->lnd_uid, lp);
+           return 0;
        }
-
-       n=(-1*MAX_RETREAT);
-       stopping = 0;
-       time_to_stop = 0;
-       while ((!stopping) && n){
-               dx = dy = 0;
-               if (lp->lnd_rpath[0] == 0 || lp->lnd_rpath[0] == 0){
-                       stopping=1;
-                       continue;
-               }
-               if (lp->lnd_mobil <= 0.0) {
-                       wu(0, lp->lnd_own, "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
-                          prland(lp),
-                          conditions[findcondition(code)].desc[orig]);
-                       if (!orig) putland(lp->lnd_uid,lp);
-                       return 0;
-               }
-               dir = chkdir(lp->lnd_rpath[0], DIR_STOP, DIR_VIEW);
-               bzero(buf,RET_LEN-1);
-               bcopy(&lp->lnd_rpath[1],buf,RET_LEN-1);
-               bzero(lp->lnd_rpath,RET_LEN);
-               bcopy(buf,lp->lnd_rpath,RET_LEN-1);
-               if (dir == -1)
-                       continue;
-               if (dir == DIR_STOP)
-                       stopping++;
-               else {
-                       dx = diroff[dir][0];
-                       dy = diroff[dir][1];
-               }
-               n++;
-
-               lcp = &lchr[(int)lp->lnd_type];
-               newx = xnorm(lp->lnd_x + dx);
-               newy = ynorm(lp->lnd_y + dy);
-
-               getsect(newx, newy, &sect);
-               if ((sect.sct_type == SCT_WATER) ||
-                       (sect.sct_type == SCT_MOUNT) ||
-                       (sect.sct_type == SCT_SANCT) ||
-                       (sect.sct_type == SCT_WASTE) ||
-                       (sect.sct_own != lp->lnd_own)){
-                               wu(0, lp->lnd_own, "%s %s,\nbut could not retreat to %s!\n",
-                                  prland(lp),
-                                  conditions[findcondition(code)].desc[orig],
-                                  xyas(newx, newy, lp->lnd_own));
-                               if (!orig) putland(lp->lnd_uid,lp);
-                               return 0;
-               }
-               mobcost = lnd_mobcost(lp, &sect, MOB_ROAD);
-               lp->lnd_x = newx;
-               lp->lnd_y = newy;
-               lp->lnd_mobil -= mobcost;
-               if (stopping)
-                       continue;
-
-               mines = getvar(V_MINE, (s_char *)&sect, EF_SECTOR);
-               if ((lcp->l_flags & L_ENGINEER) && mines > 0 &&
-                       (sect.sct_oldown != lp->lnd_own)){
-                       max = vl_find(V_SHELL, lcp->l_vtype,
-                               lcp->l_vamt, (int) lcp->l_nv);
-                       shells = getvar(V_SHELL, (s_char *)lp, EF_LAND);
-                       for (m=0; mines > 0 && m < 5; m++) {
-                               if (chance(0.66)) {
-                                       mines--;
-                                       shells = min(max, shells + 1);
-                               }
-                       }
-                       putvar(V_MINE, mines, (s_char *)&sect, EF_SECTOR);
-                       putvar(V_SHELL, shells, (s_char *)lp, EF_LAND);
-                       putsect(&sect);
-               }
-               if (mines > 0 && (sect.sct_oldown != lp->lnd_own) &&
-                       chance(DMINE_HITCHANCE(mines))) {
-                       wu(0, lp->lnd_own, "%s %s,\nand hit a mine while retreating!\n",
-                          prland(lp),
-                          conditions[findcondition(code)].desc[orig],
-                          xyas(newx, newy, lp->lnd_own));
-                       nreport(lp->lnd_own, N_LHIT_MINE, 0, 1);
-                        m = MINE_LDAMAGE();
-                       landdamage(lp, m);
-                       mines--;
-                       putvar(V_MINE, mines, (s_char *)&sect, EF_SECTOR);
-                       putsect(&sect);
-                       if (lp->lnd_effic < LAND_MINEFF)
-                               time_to_stop = 1;
-                       if (!orig) putland(lp->lnd_uid,lp);
-                       return 0;
+       dir = chkdir(lp->lnd_rpath[0], DIR_STOP, DIR_LAST);
+       memmove(lp->lnd_rpath, lp->lnd_rpath+1, sizeof(lp->lnd_rpath) - 1);
+       if (dir < 0)
+           continue;
+       if (dir == DIR_STOP)
+           stopping++;
+       else {
+           dx = diroff[dir][0];
+           dy = diroff[dir][1];
+       }
+       n++;
+
+       lcp = &lchr[(int)lp->lnd_type];
+       newx = xnorm(lp->lnd_x + dx);
+       newy = ynorm(lp->lnd_y + dy);
+
+       getsect(newx, newy, &sect);
+       mobcost = lnd_mobcost(lp, &sect);
+       if (mobcost < 0
+           || sect.sct_type == SCT_MOUNT
+           || sect.sct_own != lp->lnd_own) {
+           wu(0, lp->lnd_own, "%s %s,\nbut could not retreat to %s!\n",
+              prland(lp),
+              conditions[findcondition(code)].desc[orig],
+              xyas(newx, newy, lp->lnd_own));
+           if (!orig)
+               putland(lp->lnd_uid, lp);
+           return 0;
+       }
+       lp->lnd_x = newx;
+       lp->lnd_y = newy;
+       lp->lnd_mobil -= mobcost;
+       if (stopping)
+           continue;
+
+       mines = sect.sct_mines;
+       if ((lcp->l_flags & L_ENGINEER) && mines > 0 &&
+           (sect.sct_oldown != lp->lnd_own)) {
+           max = lcp->l_item[I_SHELL];
+           shells = lp->lnd_item[I_SHELL];
+           for (m = 0; mines > 0 && m < 5; m++) {
+               if (chance(0.66)) {
+                   mines--;
+                   shells = MIN(max, shells + 1);
                }
-               if (time_to_stop)
-                       stopping = 1;
+           }
+           sect.sct_mines = mines;
+           lp->lnd_item[I_SHELL] = shells;
+           putsect(&sect);
        }
-
-       if (orig){
-               wu(0, lp->lnd_own, "%s %s, and retreated to %s\n",
-                  prland(lp),
-                  conditions[findcondition(code)].desc[orig],
-                  xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
-       }else{
-               wu(0, lp->lnd_own, "%s %s, and ended up at %s\n",
-                  prland(lp),
-                  conditions[findcondition(code)].desc[orig],
-                  xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
+       if (mines > 0 && (sect.sct_oldown != lp->lnd_own) &&
+           chance(DMINE_LHITCHANCE(mines))) {
+           wu(0, lp->lnd_own,
+              "%s %s,\nand hit a mine in %s while retreating!\n",
+              prland(lp),
+              conditions[findcondition(code)].desc[orig],
+              xyas(newx, newy, lp->lnd_own));
+           nreport(lp->lnd_own, N_LHIT_MINE, 0, 1);
+           m = MINE_LDAMAGE();
+           landdamage(lp, m);
+           mines--;
+           sect.sct_mines = mines;
+           putsect(&sect);
+           if (!orig)
+               putland(lp->lnd_uid, lp);
+           return 0;
        }
-       if (!orig) putland(lp->lnd_uid,lp);
-       return 1;
+    }
+
+    if (orig) {
+       wu(0, lp->lnd_own, "%s %s, and retreated to %s\n",
+          prland(lp),
+          conditions[findcondition(code)].desc[orig],
+          xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
+    } else {
+       wu(0, lp->lnd_own, "%s %s, and ended up at %s\n",
+          prland(lp),
+          conditions[findcondition(code)].desc[orig],
+          xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
+    }
+    if (!orig)
+       putland(lp->lnd_uid, lp);
+    return 1;
 }