/* Emacs style mode select   -*- C++ -*-
 *-----------------------------------------------------------------------------
 *
 *
 *  PrBoom a Doom port merged with LxDoom and LSDLDoom
 *  based on BOOM, a modified and improved DOOM engine
 *  Copyright (C) 1999 by
 *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
 *  Copyright (C) 1999-2000 by
 *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 *  02111-1307, USA.
 *
 * DESCRIPTION:
 *      Archiving: SaveGame I/O.
 *
 *-----------------------------------------------------------------------------*/

#include "doomstat.h"
#include "r_main.h"
#include "p_maputl.h"
#include "p_spec.h"
#include "p_tick.h"
#include "p_saveg.h"
#include "m_random.h"
#include "am_map.h"
#include "p_enemy.h"
#include "i_system.h"
#include "rockmacros.h"
byte *save_p;

// Pads save_p to a 4-byte boundary
//  so that the load/save works on SGI&Gecko.
#define PADSAVEP()    do { save_p += (4 - ((intptr_t) save_p & 3)) & 3; } while (0)
//
// P_ArchivePlayers
//
void P_ArchivePlayers (void)
{
   int i;

   CheckSaveGame(sizeof(player_t) * MAXPLAYERS); // killough
   for (i=0 ; i<MAXPLAYERS ; i++)
      if (playeringame[i])
      {
         int      j;
         player_t *dest;

         PADSAVEP();
         dest = (player_t *) save_p;
         memcpy(dest, &players[i], sizeof(player_t));
         save_p += sizeof(player_t);
         for (j=0; j<NUMPSPRITES; j++)
            if (dest->psprites[j].state)
               dest->psprites[j].state =
                  (state_t *)(dest->psprites[j].state-states);
      }
}

//
// P_UnArchivePlayers
//
void P_UnArchivePlayers (void)
{
   int i;

   for (i=0 ; i<MAXPLAYERS ; i++)
      if (playeringame[i])
      {
         int j;

         PADSAVEP();

         memcpy(&players[i], save_p, sizeof(player_t));
         save_p += sizeof(player_t);

         // will be set when unarc thinker
         players[i].mo = NULL;
         players[i].message = NULL;
         players[i].attacker = NULL;

         for (j=0 ; j<NUMPSPRITES ; j++)
            if (players[i]. psprites[j].state)
               players[i]. psprites[j].state =
                  &states[ (intptr_t)players[i].psprites[j].state ];
      }
}


//
// P_ArchiveWorld
//
void P_ArchiveWorld (void)
{
   int            i;
   const sector_t *sec;
   const line_t   *li;
   const side_t   *si;
   short          *put;

   // killough 3/22/98: fix bug caused by hoisting save_p too early
   // killough 10/98: adjust size for changes below
   size_t size =
      (sizeof(short)*5 + sizeof sec->floorheight + sizeof sec->ceilingheight)
      * numsectors + sizeof(short)*3*numlines + 4;

   for (i=0; i<numlines; i++)
   {
      if (lines[i].sidenum[0] != -1)
         size +=
            sizeof(short)*3 + sizeof si->textureoffset + sizeof si->rowoffset;
      if (lines[i].sidenum[1] != -1)
         size +=
            sizeof(short)*3 + sizeof si->textureoffset + sizeof si->rowoffset;
   }

   CheckSaveGame(size); // killough

   PADSAVEP();                // killough 3/22/98

   put = (short *)save_p;

   // do sectors
   for (i=0, sec = sectors ; i<numsectors ; i++,sec++)
   {
      // killough 10/98: save full floor & ceiling heights, including fraction
      memcpy(put, &sec->floorheight, sizeof sec->floorheight);
      put = (void *)((char *) put + sizeof sec->floorheight);
      memcpy(put, &sec->ceilingheight, sizeof sec->ceilingheight);
      put = (void *)((char *) put + sizeof sec->ceilingheight);

      *put++ = sec->floorpic;
      *put++ = sec->ceilingpic;
      *put++ = sec->lightlevel;
      *put++ = sec->special;            // needed?   yes -- transfer types
      *put++ = sec->tag;                // needed?   need them -- killough
   }

   // do lines
   for (i=0, li = lines ; i<numlines ; i++,li++)
   {
      int j;

      *put++ = li->flags;
      *put++ = li->special;
      *put++ = li->tag;

      for (j=0; j<2; j++)
         if (li->sidenum[j] != -1)
         {
            si = &sides[li->sidenum[j]];

            // killough 10/98: save full sidedef offsets,
            // preserving fractional scroll offsets

            memcpy(put, &si->textureoffset, sizeof si->textureoffset);
            put = (void *)((char *) put + sizeof si->textureoffset);
            memcpy(put, &si->rowoffset, sizeof si->rowoffset);
            put = (void *)((char *) put + sizeof si->rowoffset);

            *put++ = si->toptexture;
            *put++ = si->bottomtexture;
            *put++ = si->midtexture;
         }
   }
   save_p = (byte *) put;
}



//
// P_UnArchiveWorld
//
void P_UnArchiveWorld (void)
{
   int          i;
   sector_t     *sec;
   line_t       *li;
   const short  *get;

   PADSAVEP();                // killough 3/22/98

   get = (short *) save_p;

   // do sectors
   for (i=0, sec = sectors ; i<numsectors ; i++,sec++)
   {
      // killough 10/98: load full floor & ceiling heights, including fractions

      memcpy(&sec->floorheight, get, sizeof sec->floorheight);
      get = (void *)((char *) get + sizeof sec->floorheight);
      memcpy(&sec->ceilingheight, get, sizeof sec->ceilingheight);
      get = (void *)((char *) get + sizeof sec->ceilingheight);

      sec->floorpic = *get++;
      sec->ceilingpic = *get++;
      sec->lightlevel = *get++;
      sec->special = *get++;
      sec->tag = *get++;
      sec->ceilingdata = 0; //jff 2/22/98 now three thinker fields, not two
      sec->floordata = 0;
      sec->lightingdata = 0;
      sec->soundtarget = 0;
   }

   // do lines
   for (i=0, li = lines ; i<numlines ; i++,li++)
   {
      int j;

      li->flags = *get++;
      li->special = *get++;
      li->tag = *get++;
      for (j=0 ; j<2 ; j++)
         if (li->sidenum[j] != -1)
         {
            side_t *si = &sides[li->sidenum[j]];

            // killough 10/98: load full sidedef offsets, including fractions

            memcpy(&si->textureoffset, get, sizeof si->textureoffset);
            get = (void *)((char *) get + sizeof si->textureoffset);
            memcpy(&si->rowoffset, get, sizeof si->rowoffset);
            get = (void *)((char *) get + sizeof si->rowoffset);

            si->toptexture = *get++;
            si->bottomtexture = *get++;
            si->midtexture = *get++;
         }
   }
   save_p = (byte *) get;
}

//
// Thinkers
//

enum {
   tc_end,
   tc_mobj
};
typedef unsigned thinkerclass_t;

// phares 9/13/98: Moved this code outside of P_ArchiveThinkers so the
// thinker indices could be used by the code that saves sector info.

static int number_of_thinkers;

void P_ThinkerToIndex(void)
{
   thinker_t *th;

   // killough 2/14/98:
   // count the number of thinkers, and mark each one with its index, using
   // the prev field as a placeholder, since it can be restored later.

   number_of_thinkers = 0;
   for (th = thinkercap.next ; th != &thinkercap ; th=th->next)
      if (th->function == P_MobjThinker)
         th->prev = (thinker_t *)(intptr_t)(++number_of_thinkers);
}

// phares 9/13/98: Moved this code outside of P_ArchiveThinkers so the
// thinker indices could be used by the code that saves sector info.

void P_IndexToThinker(void)
{
   // killough 2/14/98: restore prev pointers
   thinker_t *th;
   thinker_t *prev = &thinkercap;

   for (th = thinkercap.next ; th != &thinkercap ; prev=th, th=th->next)
      th->prev = prev;
}

//
// P_ArchiveThinkers
//
// 2/14/98 killough: substantially modified to fix savegame bugs

void P_ArchiveThinkers (void)
{
   thinker_t *th;

   CheckSaveGame(sizeof brain);      // killough 3/26/98: Save boss brain state
   memcpy(save_p, &brain, sizeof brain);
   save_p += sizeof brain;

   /* check that enough room is available in savegame buffer
    * - killough 2/14/98
    * cph - use number_of_thinkers saved by P_ThinkerToIndex above
    */
   CheckSaveGame(number_of_thinkers*(sizeof(mobj_t)+4));

   // save off the current thinkers
   for (th = thinkercap.next ; th != &thinkercap ; th=th->next)
      if (th->function == P_MobjThinker)
      {
         mobj_t *mobj;

         *save_p++ = tc_mobj;
         PADSAVEP();
         mobj = (mobj_t *)save_p;
         memcpy (mobj, th, sizeof(*mobj));
         save_p += sizeof(*mobj);
         mobj->state = (state_t *)(mobj->state - states);

         // killough 2/14/98: convert pointers into indices.
         // Fixes many savegame problems, by properly saving
         // target and tracer fields. Note: we store NULL if
         // the thinker pointed to by these fields is not a
         // mobj thinker.

         if (mobj->target)
            mobj->target = mobj->target->thinker.function ==
                           P_MobjThinker ?
                           (mobj_t *) mobj->target->thinker.prev : NULL;

         if (mobj->tracer)
            mobj->tracer = mobj->tracer->thinker.function ==
                           P_MobjThinker ?
                           (mobj_t *) mobj->tracer->thinker.prev : NULL;

         // killough 2/14/98: new field: save last known enemy. Prevents
         // monsters from going to sleep after killing monsters and not
         // seeing player anymore.

         if (mobj->lastenemy)
            mobj->lastenemy = mobj->lastenemy->thinker.function ==
                              P_MobjThinker ?
                              (mobj_t *) mobj->lastenemy->thinker.prev : NULL;

         // killough 2/14/98: end changes

         if (mobj->above_thing)                                      // phares
            mobj->above_thing = mobj->above_thing->thinker.function ==
                                P_MobjThinker ?
                                (mobj_t *) mobj->above_thing->thinker.prev : NULL;

         if (mobj->below_thing)
            mobj->below_thing = mobj->below_thing->thinker.function ==
                                P_MobjThinker ?
                                (mobj_t *) mobj->below_thing->thinker.prev : NULL;      // phares

         if (mobj->player)
            mobj->player = (player_t *)((mobj->player-players) + 1);
      }

   // add a terminating marker
   *save_p++ = tc_end;

   // killough 9/14/98: save soundtargets
   {
      int i;
      CheckSaveGame(numsectors * sizeof(mobj_t *));       // killough 9/14/98
      for (i = 0; i < numsectors; i++)
      {
         mobj_t *target = sectors[i].soundtarget;
         if (target)
            target = (mobj_t *) target->thinker.prev;
         memcpy(save_p, &target, sizeof target);
         save_p += sizeof target;
      }
   }
}

/*
 * killough 11/98
 *
 * Same as P_SetTarget() in p_tick.c, except that the target is nullified
 * first, so that no old target's reference count is decreased (when loading
 * savegames, old targets are indices, not really pointers to targets).
 */

static void P_SetNewTarget(mobj_t **mop, mobj_t *targ)
{
   *mop = NULL;
   P_SetTarget(mop, targ);
}

//
// P_UnArchiveThinkers
//
// 2/14/98 killough: substantially modified to fix savegame bugs
//

void P_UnArchiveThinkers (void)
{
   thinker_t *th;
   mobj_t    **mobj_p;    // killough 2/14/98: Translation table
   size_t    size;        // killough 2/14/98: size of or index into table

   totallive = 0;
   // killough 3/26/98: Load boss brain state
   memcpy(&brain, save_p, sizeof brain);
   save_p += sizeof brain;

   // remove all the current thinkers
   for (th = thinkercap.next; th != &thinkercap; )
   {
      thinker_t *next = th->next;
      if (th->function == P_MobjThinker)
         P_RemoveMobj ((mobj_t *) th);
      else
         Z_Free (th);
      th = next;
   }
   P_InitThinkers ();

   // killough 2/14/98: count number of thinkers by skipping through them
   {
      byte *sp = save_p;     // save pointer and skip header
      for (size = 1; *save_p++ == tc_mobj; size++)  // killough 2/14/98
      {                     // skip all entries, adding up count
         PADSAVEP();
         save_p += sizeof(mobj_t);
      }

      if (*--save_p != tc_end)
         I_Error ("P_UnArchiveThinkers: Unknown tclass %i in savegame", *save_p);

      // first table entry special: 0 maps to NULL
      *(mobj_p = malloc(size * sizeof *mobj_p)) = 0;   // table of pointers
      save_p = sp;           // restore save pointer
   }

   // read in saved thinkers
   for (size = 1; *save_p++ == tc_mobj; size++)    // killough 2/14/98
   {
      mobj_t *mobj = Z_Malloc(sizeof(mobj_t), PU_LEVEL, NULL);

      // killough 2/14/98 -- insert pointers to thinkers into table, in order:
      mobj_p[size] = mobj;

      PADSAVEP();
      memcpy (mobj, save_p, sizeof(mobj_t));
      save_p += sizeof(mobj_t);
      mobj->state = states + (intptr_t) mobj->state;

      if (mobj->player)
         (mobj->player = &players[(intptr_t) mobj->player - 1]) -> mo = mobj;

      P_SetThingPosition (mobj);
      mobj->info = &mobjinfo[mobj->type];

      // killough 2/28/98:
      // Fix for falling down into a wall after savegame loaded:
      //      mobj->floorz = mobj->subsector->sector->floorheight;
      //      mobj->ceilingz = mobj->subsector->sector->ceilingheight;

      mobj->thinker.function = P_MobjThinker;
      P_AddThinker (&mobj->thinker);

      if (!((mobj->flags ^ MF_COUNTKILL) & (MF_FRIEND | MF_COUNTKILL | MF_CORPSE)))
         totallive++;
   }

   // killough 2/14/98: adjust target and tracer fields, plus
   // lastenemy field, to correctly point to mobj thinkers.
   // NULL entries automatically handled by first table entry.
   //
   // killough 11/98: use P_SetNewTarget() to set fields

   for (th = thinkercap.next ; th != &thinkercap ; th=th->next)
   {
      P_SetNewTarget(&((mobj_t *) th)->target,
                     mobj_p[(size_t)((mobj_t *)th)->target]);

      P_SetNewTarget(&((mobj_t *) th)->tracer,
                     mobj_p[(size_t)((mobj_t *)th)->tracer]);

      P_SetNewTarget(&((mobj_t *) th)->lastenemy,
                     mobj_p[(size_t)((mobj_t *)th)->lastenemy]);

      // phares: added two new fields for Sprite Height problem

      P_SetNewTarget(&((mobj_t *) th)->above_thing,
                     mobj_p[(size_t)((mobj_t *)th)->above_thing]);

      P_SetNewTarget(&((mobj_t *) th)->below_thing,
                     mobj_p[(size_t)((mobj_t *)th)->below_thing]);
   }

   {  // killough 9/14/98: restore soundtargets
      int i;
      for (i = 0; i < numsectors; i++)
      {
         mobj_t *target;
         memcpy(&target, save_p, sizeof target);
         save_p += sizeof target;
         P_SetNewTarget(&sectors[i].soundtarget, mobj_p[(size_t) target]);
      }
   }

   free(mobj_p);    // free translation table

   // killough 3/26/98: Spawn icon landings:
   if (gamemode == commercial)
      P_SpawnBrainTargets();
}

//
// P_ArchiveSpecials
//
enum {
   tc_ceiling,
   tc_door,
   tc_floor,
   tc_plat,
   tc_flash,
   tc_strobe,
   tc_glow,
   tc_elevator,    //jff 2/22/98 new elevator type thinker
   tc_scroll,      // killough 3/7/98: new scroll effect thinker
   tc_pusher,      // phares 3/22/98:  new push/pull effect thinker
   tc_flicker,     // killough 10/4/98
   tc_endspecials
};
unsigned specials_e;

//
// Things to handle:
//
// T_MoveCeiling, (ceiling_t: sector_t * swizzle), - active list
// T_VerticalDoor, (vldoor_t: sector_t * swizzle),
// T_MoveFloor, (floormove_t: sector_t * swizzle),
// T_LightFlash, (lightflash_t: sector_t * swizzle),
// T_StrobeFlash, (strobe_t: sector_t *),
// T_Glow, (glow_t: sector_t *),
// T_PlatRaise, (plat_t: sector_t *), - active list
// T_MoveElevator, (plat_t: sector_t *), - active list      // jff 2/22/98
// T_Scroll                                                 // killough 3/7/98
// T_Pusher                                                 // phares 3/22/98
// T_FireFlicker                                            // killough 10/4/98
//

void P_ArchiveSpecials (void)
{
   thinker_t *th;
   size_t    size = 0;          // killough

   // save off the current thinkers (memory size calculation -- killough)

   for (th = thinkercap.next ; th != &thinkercap ; th=th->next)
      if (!th->function)
      {
         platlist_t *pl;
         ceilinglist_t *cl;     //jff 2/22/98 need this for ceilings too now
         for (pl=activeplats; pl; pl=pl->next)
            if (pl->plat == (plat_t *) th)   // killough 2/14/98
            {
               size += 4+sizeof(plat_t);
               goto end;
            }
         for (cl=activeceilings; cl; cl=cl->next) // search for activeceiling
            if (cl->ceiling == (ceiling_t *) th)   //jff 2/22/98
            {
               size += 4+sizeof(ceiling_t);
               goto end;
            }
end:;
      }
      else
         size +=
            th->function==T_MoveCeiling  ? 4+sizeof(ceiling_t) :
            th->function==T_VerticalDoor ? 4+sizeof(vldoor_t)  :
            th->function==T_MoveFloor    ? 4+sizeof(floormove_t):
            th->function==T_PlatRaise    ? 4+sizeof(plat_t)    :
            th->function==T_LightFlash   ? 4+sizeof(lightflash_t):
            th->function==T_StrobeFlash  ? 4+sizeof(strobe_t)  :
            th->function==T_Glow         ? 4+sizeof(glow_t)    :
            th->function==T_MoveElevator ? 4+sizeof(elevator_t):
            th->function==T_Scroll       ? 4+sizeof(scroll_t)  :
            th->function==T_Pusher       ? 4+sizeof(pusher_t)  :
            th->function==T_FireFlicker? 4+sizeof(fireflicker_t) :
            0;

   CheckSaveGame(size);          // killough

   // save off the current thinkers
   for (th=thinkercap.next; th!=&thinkercap; th=th->next)
   {
      if (!th->function)
      {
         platlist_t *pl;
         ceilinglist_t *cl;    //jff 2/22/98 add iter variable for ceilings

         // killough 2/8/98: fix plat original height bug.
         // Since acv==NULL, this could be a plat in stasis.
         // so check the active plats list, and save this
         // plat (jff: or ceiling) even if it is in stasis.

         for (pl=activeplats; pl; pl=pl->next)
            if (pl->plat == (plat_t *) th)      // killough 2/14/98
               goto plat;

         for (cl=activeceilings; cl; cl=cl->next)
            if (cl->ceiling == (ceiling_t *) th)      //jff 2/22/98
               goto ceiling;

         continue;
      }

      if (th->function == T_MoveCeiling)
      {
         ceiling_t *ceiling;
ceiling:                               // killough 2/14/98
         *save_p++ = tc_ceiling;
         PADSAVEP();
         ceiling = (ceiling_t *)save_p;
         memcpy (ceiling, th, sizeof(*ceiling));
         save_p += sizeof(*ceiling);
         ceiling->sector = (sector_t *)(ceiling->sector - sectors);
         continue;
      }

      if (th->function == T_VerticalDoor)
      {
         vldoor_t *door;
         *save_p++ = tc_door;
         PADSAVEP();
         door = (vldoor_t *) save_p;
         memcpy (door, th, sizeof *door);
         save_p += sizeof(*door);
         door->sector = (sector_t *)(door->sector - sectors);
         //jff 1/31/98 archive line remembered by door as well
         door->line = (line_t *) (door->line ? door->line-lines : -1);
         continue;
      }

      if (th->function == T_MoveFloor)
      {
         floormove_t *floor;
         *save_p++ = tc_floor;
         PADSAVEP();
         floor = (floormove_t *)save_p;
         memcpy (floor, th, sizeof(*floor));
         save_p += sizeof(*floor);
         floor->sector = (sector_t *)(floor->sector - sectors);
         continue;
      }

      if (th->function == T_PlatRaise)
      {
         plat_t *plat;
plat:   // killough 2/14/98: added fix for original plat height above
         *save_p++ = tc_plat;
         PADSAVEP();
         plat = (plat_t *)save_p;
         memcpy (plat, th, sizeof(*plat));
         save_p += sizeof(*plat);
         plat->sector = (sector_t *)(plat->sector - sectors);
         continue;
      }

      if (th->function == T_LightFlash)
      {
         lightflash_t *flash;
         *save_p++ = tc_flash;
         PADSAVEP();
         flash = (lightflash_t *)save_p;
         memcpy (flash, th, sizeof(*flash));
         save_p += sizeof(*flash);
         flash->sector = (sector_t *)(flash->sector - sectors);
         continue;
      }

      if (th->function == T_StrobeFlash)
      {
         strobe_t *strobe;
         *save_p++ = tc_strobe;
         PADSAVEP();
         strobe = (strobe_t *)save_p;
         memcpy (strobe, th, sizeof(*strobe));
         save_p += sizeof(*strobe);
         strobe->sector = (sector_t *)(strobe->sector - sectors);
         continue;
      }

      if (th->function == T_Glow)
      {
         glow_t *glow;
         *save_p++ = tc_glow;
         PADSAVEP();
         glow = (glow_t *)save_p;
         memcpy (glow, th, sizeof(*glow));
         save_p += sizeof(*glow);
         glow->sector = (sector_t *)(glow->sector - sectors);
         continue;
      }

      // killough 10/4/98: save flickers
      if (th->function == T_FireFlicker)
      {
         fireflicker_t *flicker;
         *save_p++ = tc_flicker;
         PADSAVEP();
         flicker = (fireflicker_t *)save_p;
         memcpy (flicker, th, sizeof(*flicker));
         save_p += sizeof(*flicker);
         flicker->sector = (sector_t *)(flicker->sector - sectors);
         continue;
      }

      //jff 2/22/98 new case for elevators
      if (th->function == T_MoveElevator)
      {
         elevator_t *elevator;         //jff 2/22/98
         *save_p++ = tc_elevator;
         PADSAVEP();
         elevator = (elevator_t *)save_p;
         memcpy (elevator, th, sizeof(*elevator));
         save_p += sizeof(*elevator);
         elevator->sector = (sector_t *)(elevator->sector - sectors);
         continue;
      }

      // killough 3/7/98: Scroll effect thinkers
      if (th->function == T_Scroll)
      {
         *save_p++ = tc_scroll;
         memcpy (save_p, th, sizeof(scroll_t));
         save_p += sizeof(scroll_t);
         continue;
      }

      // phares 3/22/98: Push/Pull effect thinkers

      if (th->function == T_Pusher)
      {
         *save_p++ = tc_pusher;
         memcpy (save_p, th, sizeof(pusher_t));
         save_p += sizeof(pusher_t);
         continue;
      }
   }

   // add a terminating marker
   *save_p++ = tc_endspecials;
}


//
// P_UnArchiveSpecials
//
void P_UnArchiveSpecials (void)
{
   byte tclass;

   // read in saved thinkers
   while ((tclass = *save_p++) != tc_endspecials)  // killough 2/14/98
      switch (tclass)
      {
      case tc_ceiling:
         PADSAVEP();
         {
            ceiling_t *ceiling = Z_Malloc (sizeof(*ceiling), PU_LEVEL, NULL);
            memcpy (ceiling, save_p, sizeof(*ceiling));
            save_p += sizeof(*ceiling);
            ceiling->sector = &sectors[(intptr_t)ceiling->sector];
            ceiling->sector->ceilingdata = ceiling; //jff 2/22/98

            if (ceiling->thinker.function)
               ceiling->thinker.function = T_MoveCeiling;

            P_AddThinker (&ceiling->thinker);
            P_AddActiveCeiling(ceiling);
            break;
         }

      case tc_door:
         PADSAVEP();
         {
            vldoor_t *door = Z_Malloc (sizeof(*door), PU_LEVEL, NULL);
            memcpy (door, save_p, sizeof(*door));
            save_p += sizeof(*door);
            door->sector = &sectors[(intptr_t)door->sector];

            //jff 1/31/98 unarchive line remembered by door as well
            door->line = (intptr_t)door->line!=-1? &lines[(intptr_t)door->line] : NULL;

            door->sector->ceilingdata = door;       //jff 2/22/98
            door->thinker.function = T_VerticalDoor;
            P_AddThinker (&door->thinker);
            break;
         }

      case tc_floor:
         PADSAVEP();
         {
            floormove_t *floor = Z_Malloc (sizeof(*floor), PU_LEVEL, NULL);
            memcpy (floor, save_p, sizeof(*floor));
            save_p += sizeof(*floor);
            floor->sector = &sectors[(intptr_t)floor->sector];
            floor->sector->floordata = floor; //jff 2/22/98
            floor->thinker.function = T_MoveFloor;
            P_AddThinker (&floor->thinker);
            break;
         }

      case tc_plat:
         PADSAVEP();
         {
            plat_t *plat = Z_Malloc (sizeof(*plat), PU_LEVEL, NULL);
            memcpy (plat, save_p, sizeof(*plat));
            save_p += sizeof(*plat);
            plat->sector = &sectors[(intptr_t)plat->sector];
            plat->sector->floordata = plat; //jff 2/22/98

            if (plat->thinker.function)
               plat->thinker.function = T_PlatRaise;

            P_AddThinker (&plat->thinker);
            P_AddActivePlat(plat);
            break;
         }

      case tc_flash:
         PADSAVEP();
         {
            lightflash_t *flash = Z_Malloc (sizeof(*flash), PU_LEVEL, NULL);
            memcpy (flash, save_p, sizeof(*flash));
            save_p += sizeof(*flash);
            flash->sector = &sectors[(intptr_t)flash->sector];
            flash->thinker.function = T_LightFlash;
            P_AddThinker (&flash->thinker);
            break;
         }

      case tc_strobe:
         PADSAVEP();
         {
            strobe_t *strobe = Z_Malloc (sizeof(*strobe), PU_LEVEL, NULL);
            memcpy (strobe, save_p, sizeof(*strobe));
            save_p += sizeof(*strobe);
            strobe->sector = &sectors[(intptr_t)strobe->sector];
            strobe->thinker.function = T_StrobeFlash;
            P_AddThinker (&strobe->thinker);
            break;
         }

      case tc_glow:
         PADSAVEP();
         {
            glow_t *glow = Z_Malloc (sizeof(*glow), PU_LEVEL, NULL);
            memcpy (glow, save_p, sizeof(*glow));
            save_p += sizeof(*glow);
            glow->sector = &sectors[(intptr_t)glow->sector];
            glow->thinker.function = T_Glow;
            P_AddThinker (&glow->thinker);
            break;
         }

      case tc_flicker:           // killough 10/4/98
         PADSAVEP();
         {
            fireflicker_t *flicker = Z_Malloc (sizeof(*flicker), PU_LEVEL, NULL);
            memcpy (flicker, save_p, sizeof(*flicker));
            save_p += sizeof(*flicker);
            flicker->sector = &sectors[(intptr_t)flicker->sector];
            flicker->thinker.function = T_FireFlicker;
            P_AddThinker (&flicker->thinker);
            break;
         }

         //jff 2/22/98 new case for elevators
      case tc_elevator:
         PADSAVEP();
         {
            elevator_t *elevator = Z_Malloc (sizeof(*elevator), PU_LEVEL, NULL);
            memcpy (elevator, save_p, sizeof(*elevator));
            save_p += sizeof(*elevator);
            elevator->sector = &sectors[(intptr_t)elevator->sector];
            elevator->sector->floordata = elevator; //jff 2/22/98
            elevator->sector->ceilingdata = elevator; //jff 2/22/98
            elevator->thinker.function = T_MoveElevator;
            P_AddThinker (&elevator->thinker);
            break;
         }

      case tc_scroll:       // killough 3/7/98: scroll effect thinkers
         {
            scroll_t *scroll = Z_Malloc (sizeof(scroll_t), PU_LEVEL, NULL);
            memcpy (scroll, save_p, sizeof(scroll_t));
            save_p += sizeof(scroll_t);
            scroll->thinker.function = T_Scroll;
            P_AddThinker(&scroll->thinker);
            break;
         }

      case tc_pusher:   // phares 3/22/98: new Push/Pull effect thinkers
         {
            pusher_t *pusher = Z_Malloc (sizeof(pusher_t), PU_LEVEL, NULL);
            memcpy (pusher, save_p, sizeof(pusher_t));
            save_p += sizeof(pusher_t);
            pusher->thinker.function = T_Pusher;
            pusher->source = P_GetPushThing(pusher->affectee);
            P_AddThinker(&pusher->thinker);
            break;
         }

      default:
         I_Error("P_UnarchiveSpecials: Unknown tclass %i in savegame", tclass);
      }
}

// killough 2/16/98: save/restore random number generator state information

void P_ArchiveRNG(void)
{
   CheckSaveGame(sizeof rng);
   memcpy(save_p, &rng, sizeof rng);
   save_p += sizeof rng;
}

void P_UnArchiveRNG(void)
{
   memcpy(&rng, save_p, sizeof rng);
   save_p += sizeof rng;
}

// killough 2/22/98: Save/restore automap state
// killough 2/22/98: Save/restore automap state
void P_ArchiveMap(void)
{
   int zero = 0, one = 1;
   CheckSaveGame(2 * sizeof zero + sizeof markpointnum +
                 markpointnum * sizeof *markpoints +
                 sizeof automapmode + sizeof one);

   memcpy(save_p, &automapmode, sizeof automapmode);
   save_p += sizeof automapmode;
   memcpy(save_p, &one, sizeof one);   // CPhipps - used to be viewactive, now
   save_p += sizeof one;               // that's worked out locally by D_Display
   memcpy(save_p, &zero, sizeof zero); // CPhipps - used to be followplayer
   save_p += sizeof zero;              //  that is now part of automapmode
   memcpy(save_p, &zero, sizeof zero); // CPhipps - used to be automap_grid, ditto
   save_p += sizeof zero;
   memcpy(save_p, &markpointnum, sizeof markpointnum);
   save_p += sizeof markpointnum;

   if (markpointnum)
   {
      memcpy(save_p, markpoints, sizeof *markpoints * markpointnum);
      save_p += markpointnum * sizeof *markpoints;
   }
}

void P_UnArchiveMap(void)
{
   int unused;
   memcpy(&automapmode, save_p, sizeof automapmode);
   save_p += sizeof automapmode;
   memcpy(&unused, save_p, sizeof unused);
   save_p += sizeof unused;
   memcpy(&unused, save_p, sizeof unused);
   save_p += sizeof unused;
   memcpy(&unused, save_p, sizeof unused);
   save_p += sizeof unused;

   if (automapmode & am_active)
      AM_Start();

   memcpy(&markpointnum, save_p, sizeof markpointnum);
   save_p += sizeof markpointnum;

   if (markpointnum)
   {
      while (markpointnum >= markpointnum_max)
         markpoints = realloc(markpoints, sizeof *markpoints *
                              (markpointnum_max = markpointnum_max ? markpointnum_max*2 : 16));
      memcpy(markpoints, save_p, markpointnum * sizeof *markpoints);
      save_p += markpointnum * sizeof *markpoints;
   }
}