server/server/c_wiz.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2002 Mark Wedel & Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

    The authors can be reached via e-mail at <crossfire@schmorp.de>
*/

#include <global.h>
#ifndef __CEXTRACT__
# include <sproto.h>
#endif
#include <spells.h>
#include <treasure.h>
#include <skills.h>

/** Defines for DM item stack **/
#define STACK_SIZE         50   /* Stack size, static */

/* Values for 'from' field of get_dm_object */
#define STACK_FROM_NONE     0   /* Item was not found */
#define STACK_FROM_TOP      1   /* Item is stack top */
#define STACK_FROM_STACK    2   /* Item is somewhere in stack */
#define STACK_FROM_NUMBER   3   /* Item is a number (may be top) */


/**
 * Enough of the DM functions seem to need this that I broke
 * it out to a seperate function.  name is the person
 * being saught, rq is who is looking for them.  This
 * prints diagnostics messages, and returns the
 * other player, or NULL otherwise.
 */
static player *
get_other_player_from_name (object *op, char *name)
{
  if (!name)
    return NULL;

  for_all_players (pl)
    if (!strncmp (pl->ob->name, name, MAX_NAME))
      {
        if (pl->ob == op)
          {
            new_draw_info (NDI_UNIQUE, 0, op, "You can't do that to yourself.");
            return NULL;
          }

        if (pl->ns->state != ST_PLAYING)
          {
            new_draw_info (NDI_UNIQUE, 0, op, "That player is in no state for that right now.");
            return NULL;
          }

        return pl;
      }

  new_draw_info (NDI_UNIQUE, 0, op, "No such player.");
  return 0;
}

/**
 * Actually hides specified player (obviously a DM).
 * If 'silent_dm' is non zero, other players are informed of DM entering/leaving,
 * else they just think someone left/entered.
 */
void
do_wizard_hide (object *op, int silent_dm)
{
  if (op->contr->hidden)
    {
      op->contr->hidden = 0;
      op->invisible = 1;
      new_draw_info (NDI_UNIQUE, 0, op, "You are no longer hidden from other players");
      op->map->players++;
      new_draw_info_format (NDI_UNIQUE | NDI_ALL | NDI_DK_ORANGE, 5, NULL, "%s has entered the game.", &op->name);
      if (!silent_dm)
        {
          new_draw_info (NDI_UNIQUE | NDI_ALL | NDI_LT_GREEN, 1, NULL, "The Dungeon Master has arrived!");
        }
    }
  else
    {
      op->contr->hidden = 1;
      new_draw_info (NDI_UNIQUE, 0, op, "Other players will no longer see you.");
      op->map->players--;
      if (!silent_dm)
        {
          new_draw_info (NDI_UNIQUE | NDI_ALL | NDI_LT_GREEN, 1, NULL, "The Dungeon Master is gone..");
        }
      new_draw_info_format (NDI_UNIQUE | NDI_ALL | NDI_DK_ORANGE, 5, NULL, "%s leaves the game.", &op->name);
      new_draw_info_format (NDI_UNIQUE | NDI_ALL | NDI_DK_ORANGE, 5, NULL, "%s left the game.", &op->name);
    }
}

int
command_hide (object *op, char *params)
{
  do_wizard_hide (op, 0);
  return 1;
}

/**
 * This finds and returns the object which matches the name or
 * object nubmer (specified via num #whatever).
 */
static object *
find_object_both (char *params)
{
  if (!params)
    return NULL;

  if (params[0] == '#')
    return find_object (atol (params + 1));
  else
    return find_object_name (params);
}

/**
 * Sets the god for some objects.  params should contain two values -
 * first the object to change, followed by the god to change it to.
 */
int
command_setgod (object *op, char *params)
{
  object *ob, *god;
  char *str;

  if (!params || !(str = strchr (params, ' ')))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Usage: setgod object god");
      return 0;
    }

  /* kill the space, and set string to the next param */
  *str++ = '\0';
  if (!(ob = find_object_both (params)))
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "Set whose god - can not find object %s?", params);
      return 1;
    }

  /*
   * Perhaps this is overly restrictive?  Should we perhaps be able
   * to rebless altars and the like?
   */
  if (ob->type != PLAYER)
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "%s is not a player - can not change its god", &ob->name);
      return 1;
    }

  god = find_god (str);
  if (god == NULL)
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "No such god %s.", str);
      return 1;
    }

  become_follower (ob, god);
  return 1;
}

/**
 * Add player's IP to ban_file and kick them off the server
 * I know most people have dynamic IPs but this is more of a short term
 * solution if they have to get a new IP to play maybe they'll calm down.
 * This uses the banish_file in the local directory *not* the ban_file
 * The action is logged with a ! for easy searching. -tm
 */
int
command_banish (object *op, char *params)
{
  player *pl;
  FILE *banishfile;
  char buf[MAX_BUF];
  time_t now;

  if (!params)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Usage: banish <player>.");
      return 1;
    }

  pl = get_other_player_from_name (op, params);
  if (!pl)
    return 1;

  sprintf (buf, "%s/%s", settings.localdir, BANISHFILE);

  if ((banishfile = fopen (buf, "a")) == NULL)
    {
      LOG (llevDebug, "Could not find file banish_file.\n");
      new_draw_info (NDI_UNIQUE, 0, op, "Could not find banish_file.");
      return 0;
    }

  now = time (NULL);
  /*
   * Record this as a comment - then we don't have to worry about changing
   * the parsing code.
   */
  fprintf (banishfile, "# %s (%s) banned by %s at %s\n", &pl->ob->name, pl->ns->host, &op->name, ctime (&now));
  fprintf (banishfile, "*@%s\n", pl->ns->host);
  fclose (banishfile);

  LOG (llevDebug, "! %s banned %s from IP: %s.\n", &op->name, &pl->ob->name, pl->ns->host);
  new_draw_info_format (NDI_UNIQUE | NDI_RED, 0, op, "You banish %s", &pl->ob->name);
  new_draw_info_format (NDI_UNIQUE | NDI_ALL | NDI_RED, 5, op, "%s banishes %s from the land!", &op->name, &pl->ob->name);
  command_kick (op, (char *) &pl->ob->name);
  return 1;
}

int
command_kick (object *op, char *params)
{
  for_all_players (pl)
    if ((params == NULL || !strcmp (&pl->ob->name, params)) && !INVOKE_PLAYER (KICK, pl, ARG_STRING (params)))
      {
        object *op = pl->ob;

        if (!QUERY_FLAG (op, FLAG_REMOVED) && !QUERY_FLAG (op, FLAG_FREED))
          {
            new_draw_info_format (NDI_UNIQUE | NDI_ALL | NDI_RED, 5, op, "%s is kicked out of the game.", &op->name);
            strcpy (op->contr->killer, "kicked");
          }

        pl->ns->destroy ();
      }

  return 1;
}

int
command_save_overlay (object *op, char *params)
{
  if (!op)
    return 0;

  if (op != NULL && !QUERY_FLAG (op, FLAG_WIZ))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Sorry, you can't force an overlay save.");
      return 1;
    }

  new_save_map (op->map, 2);
  new_save_map (op->map, 0);
  new_draw_info (NDI_UNIQUE, 0, op, "Current map has been saved as an" " overlay.");

  ready_map_name (op->map->path, 0);

  return 1;
}

int
command_shutdown (object *op, char *params)
{
  if (op != NULL && !QUERY_FLAG (op, FLAG_WIZ))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Sorry, you can't shutdown the server.");
      return 1;
    }

  cleanup ();
  /* not reached */
  return 1;
}

int
command_freeze (object *op, char *params)
{
  int ticks;
  player *pl;

  if (!params)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Usage: freeze [ticks] <player>.");
      return 1;
    }

  ticks = atoi (params);
  if (ticks)
    {
      while ((isdigit (*params) || isspace (*params)) && *params != 0)
        params++;
      if (*params == 0)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Usage: freeze [ticks] <player>.");
          return 1;
        }
    }
  else
    ticks = 100;

  pl = get_other_player_from_name (op, params);
  if (!pl)
    return 1;

  new_draw_info (NDI_UNIQUE | NDI_RED, 0, pl->ob, "You have been frozen by the DM!");
  new_draw_info_format (NDI_UNIQUE, 0, op, "You freeze %s for %d ticks", &pl->ob->name, ticks);
  pl->ob->speed_left = -(pl->ob->speed * ticks);
  return 0;
}

int
command_arrest (object *op, char *params)
{
  object *dummy;
  player *pl;

  if (!op)
    return 0;
  if (params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Usage: arrest <player>.");
      return 1;
    }
  pl = get_other_player_from_name (op, params);
  if (!pl)
    return 1;
  dummy = get_jail_exit (pl->ob);
  if (!dummy)
    {
      /* we have nowhere to send the prisoner.... */
      new_draw_info (NDI_UNIQUE, 0, op, "can't jail player, there is no map to hold them");
      return 0;
    }
  enter_exit (pl->ob, dummy);
  dummy->destroy ();
  new_draw_info (NDI_UNIQUE, 0, pl->ob, "You have been arrested.");
  new_draw_info (NDI_UNIQUE, 0, op, "OK.");
  LOG (llevInfo, "Player %s arrested by %s\n", &pl->ob->name, &op->name);
  return 1;
}

int
command_summon (object *op, char *params)
{
  int i;
  object *dummy;
  player *pl;

  if (!op)
    return 0;

  if (params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Usage: summon <player>.");
      return 1;
    }

  pl = get_other_player_from_name (op, params);
  if (!pl)
    return 1;

  i = find_free_spot (op, op->map, op->x, op->y, 1, 9);
  if (i == -1)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Can not find a free spot to place summoned player.");
      return 1;
    }

  dummy = object::create ();
  EXIT_PATH (dummy) = op->map->path;
  EXIT_X (dummy) = op->x + freearr_x[i];
  EXIT_Y (dummy) = op->y + freearr_y[i];
  enter_exit (pl->ob, dummy);
  dummy->destroy ();
  new_draw_info (NDI_UNIQUE, 0, pl->ob, "You are summoned.");
  new_draw_info (NDI_UNIQUE, 0, op, "OK.");

  return 1;
}

/**
 * Teleport next to target player.
 */

/* mids 01/16/2002 */
int
command_teleport (object *op, char *params)
{
  int i;
  object *dummy;
  player *pl;

  if (!op)
    return 0;

  if (params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Usage: teleport <player>.");
      return 1;
    }

  pl = get_other_player_from_name (op, params);
  if (!pl)
    return 1;

  i = find_free_spot (pl->ob, pl->ob->map, pl->ob->x, pl->ob->y, 1, 9);
  if (i == -1)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Can not find a free spot to teleport to.");
      return 1;
    }

  dummy = object::create ();
  EXIT_PATH (dummy) = pl->ob->map->path;
  EXIT_X (dummy) = pl->ob->x + freearr_x[i];
  EXIT_Y (dummy) = pl->ob->y + freearr_y[i];
  enter_exit (op, dummy);
  dummy->destroy ();
  if (!op->contr->hidden)
    new_draw_info (NDI_UNIQUE, 0, pl->ob, "You see a portal open.");
  new_draw_info (NDI_UNIQUE, 0, op, "OK.");
  return 1;
}

/**
 * This function is a real mess, because we're stucking getting
 * the entire item description in one block of text, so we just
 * can't simply parse it - we need to look for double quotes
 * for example.  This could actually get much simpler with just a
 * little help from the client - if we could get line breaks, it
 * makes parsing much easier, eg, something like:
 * arch dragon
 * name big nasty creature
 * hp 5
 * sp 30
 * Is much easier to parse than
 * dragon name "big nasty creature" hp 5 sp 30
 * for example.
 */
int
command_create (object *op, char *params)
{
  object *tmp = NULL;
  int nrof, i, magic, set_magic = 0, set_nrof = 0, gotquote, gotspace;
  char buf[MAX_BUF], *cp, *bp = buf, *bp2, *bp3, *bp4, *endline;
  archetype *at, *at_spell = NULL;
  artifact *art = NULL;

  if (!op)
    return 0;

  if (params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Usage: create [nr] [magic] <archetype> [ of <artifact>]" " [variable_to_patch setting]");
      return 1;
    }

  bp = params;

  /* We need to know where the line ends */
  endline = bp + strlen (bp);

  if (sscanf (bp, "%d ", &nrof))
    {
      if ((bp = strchr (params, ' ')) == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Usage: create [nr] [magic] <archetype> [ of <artifact>]" " [variable_to_patch setting]");
          return 1;
        }
      bp++;
      set_nrof = 1;
      LOG (llevDebug, "%s creates: (%d) %s\n", &op->name, nrof, bp);
    }

  if (sscanf (bp, "%d ", &magic))
    {
      if ((bp = strchr (bp, ' ')) == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Usage: create [nr] [magic] <archetype> [ of <artifact>]" " [variable_to_patch setting]");
          return 1;
        }

      bp++;
      set_magic = 1;
      LOG (llevDebug, "%s creates: (%d) (%d) %s\n", &op->name, nrof, magic, bp);
    }

  if ((cp = strstr (bp, " of ")) != NULL)
    {
      *cp = '\0';
      cp += 4;
    }

  for (bp2 = bp; *bp2; bp2++)
    {
      if (*bp2 == ' ')
        {
          *bp2 = '\0';
          bp2++;
          break;
        }
    }

  if ((at = archetype::find (bp)) == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "No such archetype.");
      return 1;
    }

  if (cp)
    {
      char spell_name[MAX_BUF], *fsp = NULL;

      /*
       * Try to find a spell object for this. Note that
       * we also set up spell_name which is only
       * the first word.
       */

      at_spell = archetype::find (cp);
      if (!at_spell || at_spell->clone.type != SPELL)
        at_spell = find_archetype_by_object_name (cp);
      if (!at_spell || at_spell->clone.type != SPELL)
        {
          strcpy (spell_name, cp);
          fsp = strchr (spell_name, ' ');
          if (fsp)
            {
              *fsp = 0;
              fsp++;
              at_spell = archetype::find (spell_name);

              /* Got a spell, update the first string pointer */
              if (at_spell && at_spell->clone.type == SPELL)
                bp2 = cp + strlen (spell_name) + 1;
              else
                at_spell = NULL;
            }
        }

      /* OK - we didn't find a spell - presume the 'of'
       * in this case means its an artifact.
       */
      if (!at_spell)
        {
          if (find_artifactlist (at->clone.type) == NULL)
            new_draw_info_format (NDI_UNIQUE, 0, op, "No artifact list for type %d\n", at->clone.type);
          else
            {
              art = find_artifactlist (at->clone.type)->items;

              do
                {
                  if (!strcmp (art->item->name, cp))
                    break;
                  art = art->next;
                }
              while (art != NULL);

              if (!art)
                new_draw_info_format (NDI_UNIQUE, 0, op, "No such artifact ([%d] of %s)", at->clone.type, cp);
            }

          LOG (llevDebug, "%s creates: (%d) (%d) (%s) of (%s)\n", &op->name, set_nrof ? nrof : 0, set_magic ? magic : 0, bp, cp);
        }
    }                           /* if cp */

  if ((at->clone.type == ROD || at->clone.type == WAND || at->clone.type == SCROLL ||
       at->clone.type == HORN || at->clone.type == SPELLBOOK) && !at_spell)
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "Unable to find spell %s for object that needs it, or it is of wrong type", cp);
      return 1;
    }

  /*
   * Rather than have two different blocks with a lot of similar code,
   * just create one object, do all the processing, and then determine
   * if that one object should be inserted or if we need to make copies.
   */
  tmp = arch_to_object (at);

  if (settings.real_wiz == FALSE)
    SET_FLAG (tmp, FLAG_WAS_WIZ);

  if (set_magic)
    set_abs_magic (tmp, magic);

  if (art)
    give_artifact_abilities (tmp, art->item);

  if (need_identify (tmp))
    {
      SET_FLAG (tmp, FLAG_IDENTIFIED);
      CLEAR_FLAG (tmp, FLAG_KNOWN_MAGICAL);
    }

  /*
   * This entire block here tries to find variable pairings,
   * eg, 'hp 4' or the like.  The mess here is that values
   * can be quoted (eg "my cool sword");  So the basic logic
   * is we want to find two spaces, but if we got a quote,
   * any spaces there don't count.
   */
  while (*bp2 && bp2 <= endline)
    {
      bp4 = NULL;
      gotspace = 0;
      gotquote = 0;

      /* find the first quote */
      for (bp3 = bp2; *bp3 && gotspace < 2 && gotquote < 2; bp3++)
        {

          /* Found a quote - now lets find the second one */
          if (*bp3 == '"')
            {
              *bp3 = ' ';
              bp2 = bp3 + 1;    /* Update start of string */
              bp3++;
              gotquote++;
              while (*bp3)
                {
                  if (*bp3 == '"')
                    {
                      *bp3 = '\0';
                      gotquote++;
                    }
                  else
                    bp3++;
                }
            }
          else if (*bp3 == ' ')
            gotspace++;
        }

      /*
       * If we got two spaces, send the second one to null.
       * if we've reached the end of the line, increase gotspace -
       * this is perfectly valid for the list entry listed.
       */
      if (gotspace == 2 || gotquote == 2)
        {
          bp3--;                /* Undo the extra increment */
          *bp3 = '\0';
        }
      else if (*bp3 == '\0')
        gotspace++;

      if ((gotquote && gotquote != 2) || (gotspace != 2 && gotquote != 2))
        {
          /*
           * Unfortunately, we've clobbered lots of values, so printing
           * out what we have probably isn't useful.  Break out, because
           * trying to recover is probably won't get anything useful
           * anyways, and we'd be confused about end of line pointers
           * anyways.
           */
          new_draw_info_format (NDI_UNIQUE, 0, op, "Malformed create line: %s", bp2);
          break;
        }

      /* bp2 should still point to the start of this line,
       * with bp3 pointing to the end
       */
      if (set_variable (tmp, bp2) == -1)
        new_draw_info_format (NDI_UNIQUE, 0, op, "Unknown variable %s", bp2);
      else
        new_draw_info_format (NDI_UNIQUE, 0, op, "(%s#%d)->%s", &tmp->name, tmp->count, bp2);

      bp2 = bp3 + 1;
    }

  if (at->clone.nrof)
    {
      if (at_spell)
        insert_ob_in_ob (arch_to_object (at_spell), tmp);

      tmp->x = op->x;
      tmp->y = op->y;

      if (set_nrof)
        tmp->nrof = nrof;

      tmp->map = op->map;

      tmp = insert_ob_in_ob (tmp, op);
      esrv_send_item (op, tmp);

      /* Let's put this created item on stack so dm can access it easily. */
      dm_stack_push (op->contr, tmp->count);

      return 1;
    }
  else
    {
      for (i = 0; i < (set_nrof ? nrof : 1); i++)
        {
          archetype *atmp;
          object *prev = 0, *head = 0;

          for (atmp = at; atmp; atmp = atmp->more)
            {
              object *dup = arch_to_object (atmp);

              if (at_spell)
                insert_ob_in_ob (arch_to_object (at_spell), dup);

              /*
               * The head is what contains all the important bits,
               * so just copying it over should be fine.
               */
              if (!head)
                {
                  head = dup;
                  tmp->copy_to (dup);
                }

              if (settings.real_wiz == FALSE)
                SET_FLAG (dup, FLAG_WAS_WIZ);

              dup->x = op->x + dup->arch->clone.x;
              dup->y = op->y + dup->arch->clone.y;
              dup->map = op->map;

              if (head != dup)
                {
                  dup->head = head;
                  prev->more = dup;
                }

              prev = dup;
            }

          if (QUERY_FLAG (head, FLAG_ALIVE))
            {
              object *check = head;
              int size_x = 0;
              int size_y = 0;

              while (check)
                {
                  size_x = MAX (size_x, check->arch->clone.x);
                  size_y = MAX (size_y, check->arch->clone.y);
                  check = check->more;
                }

              if (out_of_map (op->map, head->x + size_x, head->y + size_y))
                {
                  if (head->x < size_x || head->y < size_y)
                    {
                      dm_stack_pop (op->contr);
                      head->destroy ();
                      new_draw_info (NDI_UNIQUE, 0, op, "Object too big to insert in map, or wrong position.");
                      tmp->destroy ();
                      return 1;
                    }

                  check = head;

                  while (check)
                    {
                      check->x -= size_x;
                      check->y -= size_y;
                      check = check->more;
                    }
                }

              insert_ob_in_map (head, op->map, op, 0);
            }
          else
            head = insert_ob_in_ob (head, op);

          /* Let's put this created item on stack so dm can access it easily. */
          /* Wonder if we really want to push all of these, but since
           * things like rods have nrof 0, we want to cover those.
           */
          dm_stack_push (op->contr, head->count);

          if (at->clone.randomitems != NULL && !at_spell)
            create_treasure (at->clone.randomitems, head, GT_APPLY, op->map->difficulty, 0);

          esrv_send_item (op, head);
        }

      /* free the one we used to copy */
      tmp->destroy ();
    }

  return 1;
}

/*
 * Now follows dm-commands which are also acceptable from sockets
 */

int
command_inventory (object *op, char *params)
{
  object *tmp;
  int i;

  if (!params)
    {
      inventory (op, NULL);
      return 0;
    }

  if (!sscanf (params, "%d", &i) || (tmp = find_object (i)) == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Inventory of what object (nr)?");
      return 1;
    }

  inventory (op, tmp);
  return 1;
}

/* just show player's their skills for now. Dm's can
 * already see skills w/ inventory command - b.t.
 */

int
command_skills (object *op, char *params)
{
  show_skills (op, params);
  return 0;
}

int
command_dump (object *op, char *params)
{
  object *tmp;

  tmp = get_dm_object (op->contr, &params, NULL);
  if (!tmp)
    return 1;

  char *dump = dump_object (tmp);
  new_draw_info (NDI_UNIQUE, 0, op, dump);
  free (dump);

  if (QUERY_FLAG (tmp, FLAG_OBJ_ORIGINAL))
    new_draw_info (NDI_UNIQUE, 0, op, "Object is marked original");

  return 1;
}

/**
 *  When DM is possessing a monster, flip aggression on and off, to allow
 * better motion.
 */
int
command_mon_aggr (object *op, char *params)
{
  if (op->enemy || !QUERY_FLAG (op, FLAG_UNAGGRESSIVE))
    {
      op->enemy = NULL;
      SET_FLAG (op, FLAG_UNAGGRESSIVE);
      new_draw_info (NDI_UNIQUE, 0, op, "Aggression turned OFF");
    }
  else
    {
      CLEAR_FLAG (op, FLAG_FRIENDLY);
      CLEAR_FLAG (op, FLAG_UNAGGRESSIVE);
      new_draw_info (NDI_UNIQUE, 0, op, "Aggression turned ON");
    }

  return 1;
}

/** DM can possess a monster.  Basically, this tricks the client into thinking
 * a given monster, is actually the player it controls.  This allows a DM
 * to inhabit a monster's body, and run around the game with it.
 * This function is severely broken - it has tons of hardcoded values,
 */
int
command_possess (object *op, char *params)
{
  object *victim, *curinv, *nextinv;
  player *pl;
  int i;
  char buf[MAX_BUF];

  victim = NULL;
  if (params != NULL)
    {
      if (sscanf (params, "%d", &i))
        victim = find_object (i);
      else if (sscanf (params, "%s", buf))
        victim = find_object_name (buf);
    }
  if (victim == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Patch what object (nr)?");
      return 1;
    }

  if (victim == op)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "As insane as you are, I cannot " "allow you to possess yourself.");
      return 1;
    }

  /* clear out the old inventory */
  curinv = op->inv;
  while (curinv != NULL)
    {
      nextinv = curinv->below;
      esrv_del_item (op->contr, curinv->count);
      curinv = nextinv;
    }

  /* make the switch */
  pl = op->contr;
  victim->contr = pl;
  pl->ob = victim;
  victim->type = PLAYER;
  SET_FLAG (victim, FLAG_WIZ);

  /* send the inventory to the client */
  curinv = victim->inv;
  while (curinv != NULL)
    {
      nextinv = curinv->below;
      esrv_send_item (victim, curinv);
      curinv = nextinv;
    }
  /* basic patchup */
  /* The use of hard coded values is terrible.  Note
   * that really, to be fair, this shouldn't get changed at
   * all - if you are possessing a kobold, you should have the
   * same limitations.  As it is, as more body locations are added,
   * this will give this player more locations than perhaps
   * they should be allowed.
   */
  for (i = 0; i < NUM_BODY_LOCATIONS; i++)
    if (i == 1 || i == 6 || i == 8 || i == 9)
      victim->body_info[i] = 2;
    else
      victim->body_info[i] = 1;

  esrv_new_player (pl, 80);     /* just pick a wieght, we don't care */
  esrv_send_inventory (victim, victim);

  victim->update_stats ();

  do_some_living (victim);
  return 1;
}

int
command_patch (object *op, char *params)
{
  char *arg, *arg2;
  object *tmp;

  tmp = get_dm_object (op->contr, &params, NULL);
  if (!tmp)
    /* Player already informed of failure */
    return 1;

  /* params set to first value by get_dm_default */
  arg = params;
  if (arg == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Patch what values?");
      return 1;
    }

  if ((arg2 = strchr (arg, ' ')))
    arg2++;
  if (settings.real_wiz == FALSE)
    SET_FLAG (tmp, FLAG_WAS_WIZ);       /* To avoid cheating */
  if (set_variable (tmp, arg) == -1)
    new_draw_info_format (NDI_UNIQUE, 0, op, "Unknown variable %s", arg);
  else
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "(%s#%d)->%s=%s", &tmp->name, tmp->count, arg, arg2);
    }

  return 1;
}

int
command_remove (object *op, char *params)
{
  object *tmp;
  int from;

  tmp = get_dm_object (op->contr, &params, &from);
  if (!tmp)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Remove what object (nr)?");
      return 1;
    }

  if (tmp->type == PLAYER)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Unable to remove a player!");
      return 1;
    }

  if (QUERY_FLAG (tmp, FLAG_REMOVED))
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "%s is already removed!", query_name (tmp));
      return 1;
    }

  if (from != STACK_FROM_STACK)
    /* Item is either stack top, or is a number thus is now stack top, let's remove it  */
    dm_stack_pop (op->contr);

  /* Always work on the head - otherwise object will get in odd state */
  if (tmp->head)
    tmp = tmp->head;
  tmp->remove ();
  return 1;
}

int
command_free (object *op, char *params)
{
  object *tmp;
  int from;

  tmp = get_dm_object (op->contr, &params, &from);

  if (!tmp)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Free what object (nr)?");
      return 1;
    }

  if (from != STACK_FROM_STACK)
    /* Item is either stack top, or is a number thus is now stack top, let's remove it  */
    dm_stack_pop (op->contr);

  if (!QUERY_FLAG (tmp, FLAG_REMOVED))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Warning, item wasn't removed.");
      tmp->remove ();
    }

  if (tmp->head)
    tmp = tmp->head;

  tmp->destroy ();
  return 1;
}

/**
 * This adds exp to a player.  We now allow adding to a specific skill.
 */
int
command_addexp (object *op, char *params)
{
  char buf[MAX_BUF], skill[MAX_BUF];
  int i, q;
  object *skillob = NULL;

  skill[0] = '\0';
  if ((params == NULL) || (strlen (params) > MAX_BUF) || ((q = sscanf (params, "%s %d %s", buf, &i, skill)) < 2))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Usage: addexp <who> <how much> [<skill>].");
      return 1;
    }

  for_all_players (pl)
    if (!strncmp (pl->ob->name, buf, MAX_NAME))
      {
        if (q >= 3)
          {
            skillob = find_skill_by_name (pl->ob, skill);
            if (!skillob)
              {
                new_draw_info_format (NDI_UNIQUE, 0, op, "Unable to find skill %s in %s", skill, buf);
                return 1;
              }

            i = check_exp_adjust (skillob, i);
            skillob->stats.exp += i;
            calc_perm_exp (skillob);
            player_lvl_adj (pl->ob, skillob);
          }

        pl->ob->stats.exp += i;
        calc_perm_exp (pl->ob);
        player_lvl_adj (pl->ob, NULL);

        if (settings.real_wiz == FALSE)
          SET_FLAG (pl->ob, FLAG_WAS_WIZ);

        return 1;
      }

  new_draw_info (NDI_UNIQUE, 0, op, "No such player.");
  return 1;
}

/**************************************************************************/

/* Mods made by Tyler Van Gorder, May 10-13, 1992.                        */

/* CSUChico : tvangod@cscihp.ecst.csuchico.edu                            */

/**************************************************************************/

int
command_stats (object *op, char *params)
{
  char thing[20];
  char buf[MAX_BUF];

  thing[0] = '\0';
  if (params == NULL || !sscanf (params, "%s", thing) || thing == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Who?");
      return 1;
    }

  for_all_players (pl)
    if (!strcmp (pl->ob->name, thing))
      {
        sprintf (buf, "Str : %-2d      H.P. : %-4d  MAX : %d", pl->ob->stats.Str, pl->ob->stats.hp, pl->ob->stats.maxhp);
        new_draw_info (NDI_UNIQUE, 0, op, buf);
        sprintf (buf, "Dex : %-2d      S.P. : %-4d  MAX : %d", pl->ob->stats.Dex, pl->ob->stats.sp, pl->ob->stats.maxsp);
        new_draw_info (NDI_UNIQUE, 0, op, buf);
        sprintf (buf, "Con : %-2d        AC : %-4d  WC  : %d", pl->ob->stats.Con, pl->ob->stats.ac, pl->ob->stats.wc);
        new_draw_info (NDI_UNIQUE, 0, op, buf);
        sprintf (buf, "Int : %-2d    Damage : %d", pl->ob->stats.Int, pl->ob->stats.dam);
        new_draw_info (NDI_UNIQUE, 0, op, buf);
        sprintf (buf, "Wis : %-2d       EXP : %" PRId64, pl->ob->stats.Wis, pl->ob->stats.exp);
        new_draw_info (NDI_UNIQUE, 0, op, buf);
        sprintf (buf, "Pow : %-2d    Grace : %d", pl->ob->stats.Pow, pl->ob->stats.grace);
        new_draw_info (NDI_UNIQUE, 0, op, buf);
        sprintf (buf, "Cha : %-2d      Food : %d", pl->ob->stats.Cha, pl->ob->stats.food);
        new_draw_info (NDI_UNIQUE, 0, op, buf);
        return 1;
      }

  new_draw_info (NDI_UNIQUE, 0, op, "No such player.");
  return 1;
}

int
command_abil (object *op, char *params)
{
  char thing[20], thing2[20];
  int iii;
  player *pl;
  char buf[MAX_BUF];

  iii = 0;
  thing[0] = '\0';
  thing2[0] = '\0';
  if (params == NULL || !sscanf (params, "%s %s %d", thing, thing2, &iii) || thing == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Who?");
      return 1;
    }

  if (thing2 == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You can't change that.");
      return 1;
    }

  if (iii < MIN_STAT || iii > MAX_STAT)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Illegal range of stat.\n");
      return 1;
    }

  for_all_players (pl)
    {
      if (!strcmp (pl->ob->name, thing))
        {
          if (settings.real_wiz == FALSE)
            SET_FLAG (pl->ob, FLAG_WAS_WIZ);
          if (!strcmp ("str", thing2))
            pl->ob->stats.Str = iii, pl->orig_stats.Str = iii;
          if (!strcmp ("dex", thing2))
            pl->ob->stats.Dex = iii, pl->orig_stats.Dex = iii;
          if (!strcmp ("con", thing2))
            pl->ob->stats.Con = iii, pl->orig_stats.Con = iii;
          if (!strcmp ("wis", thing2))
            pl->ob->stats.Wis = iii, pl->orig_stats.Wis = iii;
          if (!strcmp ("cha", thing2))
            pl->ob->stats.Cha = iii, pl->orig_stats.Cha = iii;
          if (!strcmp ("int", thing2))
            pl->ob->stats.Int = iii, pl->orig_stats.Int = iii;
          if (!strcmp ("pow", thing2))
            pl->ob->stats.Pow = iii, pl->orig_stats.Pow = iii;
          sprintf (buf, "%s has been altered.", &pl->ob->name);
          new_draw_info (NDI_UNIQUE, 0, op, buf);
          pl->ob->update_stats ();
          return 1;
        }
    }

  new_draw_info (NDI_UNIQUE, 0, op, "No such player.");
  return 1;
}

int
command_reset (object *op, char *params)
{
  maptile *m;
  object *dummy = NULL, *tmp = NULL;

  if (params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Reset what map [name]?");
      return 1;
    }

  if (strcmp (params, ".") == 0)
    params = op->map->path;
  
  m = has_been_loaded (params);
  if (m == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "No such map.");
      return 1;
    }

  if (m->in_memory != MAP_SWAPPED)
    {
      if (m->in_memory != MAP_IN_MEMORY)
        {
          LOG (llevError, "Tried to swap out map which was not in memory.\n");
          return 0;
        }

      /*
       * Only attempt to remove the player that is doing the reset, and not other
       * players or wiz's.
       */
      if (op->map == m)
        {
          dummy = object::create ();
          dummy->map = NULL;
          EXIT_X (dummy) = op->x;
          EXIT_Y (dummy) = op->y;
          EXIT_PATH (dummy) = op->map->path;
          op->remove ();
          op->map = NULL;
          tmp = op;
        }
      swap_map (m);
    }

  if (m->in_memory == MAP_SWAPPED)
    {
      LOG (llevDebug, "Resetting map %s.\n", m->path);

      /* setting this effectively causes an immediate reload */
      m->reset_time = 1;
      flush_old_maps ();
      new_draw_info (NDI_UNIQUE, 0, op, "OK.");

      if (tmp)
        {
          enter_exit (tmp, dummy);
          dummy->destroy ();
        }

      return 1;
    }
  else
    {
      player *pl;
      int playercount = 0;

      /* Need to re-insert player if swap failed for some reason */
      if (tmp)
        {
          insert_ob_in_map (op, m, NULL, 0);
          dummy->destroy ();
        }

      new_draw_info (NDI_UNIQUE, 0, op, "Reset failed, couldn't swap map, the following players are on it:");

      for_all_players (pl)
        if (pl->ob->map == m && pl->ob != op)
          {
            new_draw_info_format (NDI_UNIQUE, 0, op, "%s", &pl->ob->name);
            playercount++;
          }

      if (!playercount)
        new_draw_info (NDI_UNIQUE, 0, op, "hmm, I don't see any other players on this map, something else is the problem.");
      return 1;
    }
}

int
command_nowiz (object *op, char *params)
{                               /* 'noadm' is alias */
  CLEAR_FLAG (op, FLAG_WIZ);
  CLEAR_FLAG (op, FLAG_WIZPASS);
  CLEAR_FLAG (op, FLAG_WIZCAST);

  if (settings.real_wiz == TRUE)
    CLEAR_FLAG (op, FLAG_WAS_WIZ);
  if (op->contr->hidden)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You are no longer hidden from other players");
      op->map->players++;
      new_draw_info_format (NDI_UNIQUE | NDI_ALL | NDI_DK_ORANGE, 5, NULL, "%s has entered the game.", &op->name);
      op->contr->hidden = 0;
      op->invisible = 1;
    }
  else
    new_draw_info (NDI_UNIQUE | NDI_ALL | NDI_LT_GREEN, 1, NULL, "The Dungeon Master is gone..");
  return 1;
}

/**
 * object *op is trying to become dm.
 * pl_name is name supplied by player.  Restrictive DM will make it harder
 * for socket users to become DM - in that case, it will check for the players
 * character name.
 */
static int
checkdm (object *op, const char *pl_name, const char *pl_passwd, const char *pl_host)
{
  FILE *dmfile;
  char buf[MAX_BUF];
  char line_buf[160], name[160], passwd[160], host[160];

#ifdef RESTRICTIVE_DM
  *pl_name = op->name ? op->name : "*";
#endif

  sprintf (buf, "%s/%s", settings.confdir, DMFILE);
  if ((dmfile = fopen (buf, "r")) == NULL)
    {
      LOG (llevDebug, "Could not find DM file.\n");
      return 0;
    }

  while (fgets (line_buf, 160, dmfile) != NULL)
    {
      if (line_buf[0] == '#')
        continue;
      if (sscanf (line_buf, "%[^:]:%[^:]:%s\n", name, passwd, host) != 3)
        {
          LOG (llevError, "Warning - malformed dm file entry: %s\n", line_buf);
        }
      else if ((!strcmp (name, "*") || (pl_name && !strcmp (pl_name, name)))
               && (!strcmp (passwd, "*") || !strcmp (passwd, pl_passwd)) && (!strcmp (host, "*") || !strcmp (host, pl_host)))
        {
          fclose (dmfile);
          return (1);
        }
    }
  fclose (dmfile);
  return (0);
}

int
do_wizard_dm (object *op, char *params, int silent)
{
  if (!op->contr)
    return 0;

  if (QUERY_FLAG (op, FLAG_WIZ))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You are already the Dungeon Master!");
      return 0;
    }

  if (checkdm (op, op->name, (params ? params : "*"), op->contr->ns->host))
    {
      SET_FLAG (op, FLAG_WIZ);
      SET_FLAG (op, FLAG_WAS_WIZ);
      SET_FLAG (op, FLAG_WIZPASS);
      SET_FLAG (op, FLAG_WIZCAST);
      new_draw_info (NDI_UNIQUE, 0, op, "Ok, you are the Dungeon Master!");
      /*
       * Remove setting flying here - that won't work, because next
       * fix_player() is called that will get cleared - proper solution
       * is probably something like a wiz_force which gives that and any
       * other desired abilities.
       */
      clear_los (op);
      op->contr->write_buf[0] = '\0';

      if (!silent)
        new_draw_info (NDI_UNIQUE | NDI_ALL | NDI_LT_GREEN, 1, NULL, "The Dungeon Master has arrived!");

      return 1;
    }
  else
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Sorry Pal, I don't think so.");
      op->contr->write_buf[0] = '\0';
      return 0;
    }
}

/*
 * Actual command to perhaps become dm.  Changed aroun a bit in version 0.92.2
 * - allow people on sockets to become dm, and allow better dm file
 */
int
command_dm (object *op, char *params)
{
  if (!op->contr)
    return 0;

  do_wizard_dm (op, params, 0);

  return 1;
}

int
command_invisible (object *op, char *params)
{
  if (op)
    {
      op->invisible += 100;
      update_object (op, UP_OBJ_FACE);
      new_draw_info (NDI_UNIQUE, 0, op, "You turn invisible.");
    }

  return 0;
}

/**
 * Returns spell object (from archetypes) by name.
 * Returns NULL if 0 or more than one spell matches.
 * Used for wizard's learn spell/prayer.
 *
 * op is the player issuing the command.
 *
 * Ignores archetypes "spelldirect_xxx" since these archetypes are not used
 * anymore (but may still be present in some player's inventories and thus
 * cannot be removed). We have to ignore them here since they have the same
 * name than other "spell_xxx" archetypes and would always conflict.
 */
static object *
get_spell_by_name (object *op, const char *spell_name)
{
  archetype *ar;
  archetype *found;
  int conflict_found;
  size_t spell_name_length;

  /* First check for full name matches. */
  conflict_found = 0;
  found = NULL;
  for (ar = first_archetype; ar != NULL; ar = ar->next)
    {
      if (ar->clone.type != SPELL)
        continue;

      if (strncmp (ar->name, "spelldirect_", 12) == 0)
        continue;

      if (strcmp (ar->clone.name, spell_name) != 0)
        continue;

      if (found != NULL)
        {
          if (!conflict_found)
            {
              conflict_found = 1;
              new_draw_info_format (NDI_UNIQUE, 0, op, "More than one archetype matches the spell name %s:", spell_name);
              new_draw_info_format (NDI_UNIQUE, 0, op, "- %s", &found->name);
            }
          new_draw_info_format (NDI_UNIQUE, 0, op, "- %s", &ar->name);
          continue;
        }

      found = ar;
    }

  /* No match if more more than one archetype matches. */
  if (conflict_found)
    return NULL;

  /* Return if exactly one archetype matches. */
  if (found != NULL)
    return arch_to_object (found);

  /* No full match found: now check for partial matches. */
  spell_name_length = strlen (spell_name);
  conflict_found = 0;
  found = NULL;
  for (ar = first_archetype; ar != NULL; ar = ar->next)
    {
      if (ar->clone.type != SPELL)
        continue;

      if (strncmp (ar->name, "spelldirect_", 12) == 0)
        continue;

      if (strncmp (ar->clone.name, spell_name, spell_name_length) != 0)
        continue;

      if (found != NULL)
        {
          if (!conflict_found)
            {
              conflict_found = 1;
              new_draw_info_format (NDI_UNIQUE, 0, op, "More than one spell matches %s:", spell_name);
              new_draw_info_format (NDI_UNIQUE, 0, op, "- %s", &found->clone.name);
            }
          new_draw_info_format (NDI_UNIQUE, 0, op, "- %s", &ar->clone.name);
          continue;
        }

      found = ar;
    }

  /* No match if more more than one archetype matches. */
  if (conflict_found)
    return NULL;

  /* Return if exactly one archetype matches. */
  if (found != NULL)
    return arch_to_object (found);

  /* No spell found: just print an error message. */
  new_draw_info_format (NDI_UNIQUE, 0, op, "The spell %s does not exist.", spell_name);
  return NULL;
}

static int
command_learn_spell_or_prayer (object *op, char *params, int special_prayer)
{
  object *tmp;

  if (op->contr == NULL || params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Which spell do you want to learn?");
      return 0;
    }

  tmp = get_spell_by_name (op, params);
  if (tmp == NULL)
    {
      return 0;
    }

  if (check_spell_known (op, tmp->name))
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "You already know the spell %s.", &tmp->name);
      return 0;
    }

  do_learn_spell (op, tmp, special_prayer);
  tmp->destroy ();
  return 1;
}

int
command_learn_spell (object *op, char *params)
{
  return command_learn_spell_or_prayer (op, params, 0);
}

int
command_learn_special_prayer (object *op, char *params)
{
  return command_learn_spell_or_prayer (op, params, 1);
}

int
command_forget_spell (object *op, char *params)
{
  object *spell;

  if (op->contr == NULL || params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Which spell do you want to forget?");
      return 0;
    }

  spell = lookup_spell_by_name (op, params);
  if (spell == NULL)
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "You do not know the spell %s.", params);
      return 0;
    }

  do_forget_spell (op, spell->name);
  return 1;
}

/**
 * Lists all plugins currently loaded with their IDs and full names.
 */
int
command_listplugins (object *op, char *params)
{
  plugins_display_list (op);
  return 1;
}

/**
 * Loads the given plugin. The DM specifies the name of the library to load (no
 * pathname is needed). Do not ever attempt to load the same plugin more than
 * once at a time, or bad things could happen.
 */
int
command_loadplugin (object *op, char *params)
{
  char buf[MAX_BUF];

  if (params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Load which plugin?");
      return 1;
    }

  strcpy (buf, LIBDIR);
  strcat (buf, "/plugins/");
  strcat (buf, params);
  LOG (llevDebug, "Requested plugin file is %s\n", buf);
  if (plugins_init_plugin (buf) == 0)
    new_draw_info (NDI_UNIQUE, 0, op, "Plugin successfully loaded.");
  else
    new_draw_info (NDI_UNIQUE, 0, op, "Could not load plugin.");
  return 1;
}

/**
 * Unloads the given plugin. The DM specified the ID of the library to unload.
 * Note that some things may behave strangely if the correct plugins are not
 * loaded.
 */
int
command_unloadplugin (object *op, char *params)
{
  if (params == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Remove which plugin?");
      return 1;
    }

  if (plugins_remove_plugin (params) == 0)
    new_draw_info (NDI_UNIQUE, 0, op, "Plugin successfully removed.");
  else
    new_draw_info (NDI_UNIQUE, 0, op, "Could not remove plugin.");
  return 1;
}

/**
 * A players wants to become DM and hide.
 * Let's see if that's authorized.
 * Make sure to not tell anything to anyone.
 */
int
command_dmhide (object *op, char *params)
{
  if (!do_wizard_dm (op, params, 1))
    return 0;

  do_wizard_hide (op, 1);

  return 1;
}

void
dm_stack_pop (player *pl)
{
  if (!pl->stack_items || !pl->stack_position)
    {
      new_draw_info (NDI_UNIQUE, 0, pl->ob, "Empty stack!");
      return;
    }

  pl->stack_position--;
  new_draw_info_format (NDI_UNIQUE, 0, pl->ob, "Popped item from stack, %d left.", pl->stack_position);
}

/**
 * Get current stack top item for player.
 * Returns NULL if no stacked item.
 * If stacked item disappeared (freed), remove it.
 *
 * Ryo, august 2004
 */
object *
dm_stack_peek (player *pl)
{
  object *ob;

  if (!pl->stack_position)
    {
      new_draw_info (NDI_UNIQUE, 0, pl->ob, "Empty stack!");
      return NULL;
    }

  ob = find_object (pl->stack_items[pl->stack_position - 1]);
  if (!ob)
    {
      new_draw_info (NDI_UNIQUE, 0, pl->ob, "Stacked item was removed!");
      dm_stack_pop (pl);
      return NULL;
    }

  return ob;
}

/**
 * Push specified item on player stack.
 * Inform player of position.
 * Initializes variables if needed.
 */
void
dm_stack_push (player *pl, tag_t item)
{
  if (!pl->stack_items)
    {
      pl->stack_items = (tag_t *) malloc (sizeof (tag_t) * STACK_SIZE);
      memset (pl->stack_items, 0, sizeof (tag_t) * STACK_SIZE);
    }

  if (pl->stack_position == STACK_SIZE)
    {
      new_draw_info (NDI_UNIQUE, 0, pl->ob, "Item stack full!");
      return;
    }

  pl->stack_items[pl->stack_position] = item;
  new_draw_info_format (NDI_UNIQUE, 0, pl->ob, "Item stacked as %d.", pl->stack_position);
  pl->stack_position++;
}

/**
 * Checks 'params' for object code.
 *
 * Can be:
 *  * empty => get current object stack top for player
 *  * number => get item with that tag, stack it for future use
 *  * $number => get specified stack item
 *  * "me" => player himself
 *
 * At function exit, params points to first non-object char
 *
 * 'from', if not NULL, contains at exit:
 *  * STACK_FROM_NONE => object not found
 *  * STACK_FROM_TOP => top item stack, may be NULL if stack was empty
 *  * STACK_FROM_STACK => item from somewhere in the stack
 *  * STACK_FROM_NUMBER => item by number, pushed on stack
 *
 * Ryo, august 2004
 */
object *
get_dm_object (player *pl, char **params, int *from)
{
  int item_tag, item_position;
  object *ob;

  if (!pl)
    return NULL;

  if (!params || !*params || **params == '\0')
    {
      if (from)
        *from = STACK_FROM_TOP;
      /* No parameter => get stack item */
      return dm_stack_peek (pl);
    }

  /* Let's clean white spaces */
  while (**params == ' ')
    (*params)++;

  /* Next case: number => item tag */
  if (sscanf (*params, "%d", &item_tag))
    {
      /* Move parameter to next item */
      while (isdigit (**params))
        (*params)++;

      /* And skip blanks, too */
      while (**params == ' ')
        (*params)++;

      /* Get item */
      ob = find_object (item_tag);
      if (!ob)
        {
          if (from)
            *from = STACK_FROM_NONE;
          new_draw_info_format (NDI_UNIQUE, 0, pl->ob, "No such item %d!", item_tag);
          return NULL;
        }

      /* Got one, let's push it on stack */
      dm_stack_push (pl, item_tag);
      if (from)
        *from = STACK_FROM_NUMBER;
      return ob;
    }

  /* Next case: $number => stack item */
  if (sscanf (*params, "$%d", &item_position))
    {
      /* Move parameter to next item */
      (*params)++;

      while (isdigit (**params))
        (*params)++;
      while (**params == ' ')
        (*params)++;

      if (item_position >= pl->stack_position)
        {
          if (from)
            *from = STACK_FROM_NONE;
          new_draw_info_format (NDI_UNIQUE, 0, pl->ob, "No such stack item %d!", item_position);
          return NULL;
        }

      ob = find_object (pl->stack_items[item_position]);
      if (!ob)
        {
          if (from)
            *from = STACK_FROM_NONE;
          new_draw_info_format (NDI_UNIQUE, 0, pl->ob, "Stack item %d was removed.", item_position);
          return NULL;
        }

      if (from)
        *from = item_position < pl->stack_position - 1 ? STACK_FROM_STACK : STACK_FROM_TOP;
      return ob;
    }

  /* Next case: 'me' => return pl->ob */
  if (!strncmp (*params, "me", 2))
    {
      if (from)
        *from = STACK_FROM_NUMBER;
      dm_stack_push (pl, pl->ob->count);

      /* Skip to next token */
      (*params) += 2;
      while (**params == ' ')
        (*params)++;

      return pl->ob;
    }

  /* Last case: get stack top */
  if (from)
    *from = STACK_FROM_TOP;
  return dm_stack_peek (pl);
}

/**
 * Pop the stack top.
 */
int
command_stack_pop (object *op, char *params)
{
  dm_stack_pop (op->contr);
  return 0;
}

/**
 * Push specified item on stack.
 */
int
command_stack_push (object *op, char *params)
{
  object *ob;
  int from;

  ob = get_dm_object (op->contr, &params, &from);

  if (ob && from != STACK_FROM_NUMBER)
    /* Object was from stack, need to push it again */
    dm_stack_push (op->contr, ob->count);

  return 0;
}

/**
 * Displays stack contents.
 */
int
command_stack_list (object *op, char *params)
{
  int item;
  object *display;
  player *pl = op->contr;

  new_draw_info (NDI_UNIQUE, 0, op, "Item stack contents:");

  for (item = 0; item < pl->stack_position; item++)
    {
      display = find_object (pl->stack_items[item]);
      if (display)
        new_draw_info_format (NDI_UNIQUE, 0, op, " %d : %s [%d]", item, &display->name, display->count);
      else
        /* Item was freed */
        new_draw_info_format (NDI_UNIQUE, 0, op, " %d : (lost item: %d)", item, pl->stack_items[item]);
    }

  return 0;
}

/**
 * Empty DM item stack.
 */
int
command_stack_clear (object *op, char *params)
{
  op->contr->stack_position = 0;
  new_draw_info (NDI_UNIQUE, 0, op, "Item stack cleared.");
  return 0;
}

int
command_insert_into (object *op, char *params)
{
  object *left, *right, *inserted;
  int left_from, right_from;

  left = get_dm_object (op->contr, &params, &left_from);
  if (!left)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Insert into what object?");
      return 0;
    }

  if (left_from == STACK_FROM_NUMBER)
    /* Item was stacked, remove it else right will be the same... */
    dm_stack_pop (op->contr);

  right = get_dm_object (op->contr, &params, &right_from);

  if (!right)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Insert what item?");
      return 0;
    }

  if (left_from == STACK_FROM_TOP && right_from == STACK_FROM_TOP)
    {
      /*
       * Special case: both items were taken from stack top.
       * Override the behaviour, taking left as item just below top, if exists.
       * See function description for why.
       * Besides, can't insert an item into itself.
       */
      if (op->contr->stack_position > 1)
        {
          left = find_object (op->contr->stack_items[op->contr->stack_position - 2]);
          if (left)
            new_draw_info (NDI_UNIQUE, 0, op, "(Note: item to insert into taken from undertop)");
          else
            /* Stupid case: item under top was freed, fallback to stack top */
            left = right;
        }
    }

  if (left == right)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Can't insert an object into itself!");
      return 0;
    }

  if (right->type == PLAYER)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Can't insert a player into something!");
      return 0;
    }

  if (!QUERY_FLAG (right, FLAG_REMOVED))
    right->remove ();
  inserted = insert_ob_in_ob (right, left);
  if (left->type == PLAYER)
    if (inserted == right)
      esrv_send_item (left, right);
    else
      esrv_update_item (UPD_WEIGHT | UPD_NAME | UPD_NROF, left, inserted);

  new_draw_info_format (NDI_UNIQUE, 0, op, "Inserted %s in %s", query_name (inserted), query_name (left));

  return 0;

}
Revision:	1.27
Committed:	Sat Dec 23 13:56:25 2006 UTC (17 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.26:	+54 -63 lines
Log Message:	an experiment