server/server/pets.C

/*
 * CrossFire, A Multiplayer game for X-windows
 * 
 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
 * 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>
#include <sproto.h>

/* given that 'pet' is a friendly object, this function returns a
 * monster the pet should attack, NULL if nothing appropriate is
 * found.  it basically looks for nasty things around the owner
 * of the pet to attack.
 * this is now tilemap aware.
 */
object *
get_pet_enemy (object *pet, rv_vector * rv)
{
  object *owner, *tmp, *attacker, *tmp3;
  int i;
  sint16 x, y;
  maptile *nm;
  int search_arr[SIZEOFFREE];
  int mflags;

  attacker = pet->attacked_by;  /*pointer to attacking enemy */
  pet->attacked_by = NULL;      /*clear this, since we are dealing with it */

  if (owner = pet->owner)
    {
      /* If the owner has turned on the pet, make the pet
       * unfriendly.
       */
      if (check_enemy (owner, rv) == pet)
        {
          remove_friendly_object (pet);
          pet->attack_movement &= ~PETMOVE;
          return owner;
        }
    }
  else
    {
      /* else the owner is no longer around, so the
       * pet no longer needs to be friendly.
       */
      remove_friendly_object (pet);
      pet->attack_movement &= ~PETMOVE;
      return 0;
    }

  /* If they are not on the same map, the pet won't be agressive */
  //if (!on_same_map (pet, owner))
  //  return 0;

  /* See if the pet has an existing enemy. If so, don't start a new one */
  if (tmp = check_enemy (pet, rv))
    {
      if (tmp == owner && !QUERY_FLAG (pet, FLAG_CONFUSED) && QUERY_FLAG (pet, FLAG_FRIENDLY))
        /* without this check, you can actually get pets with
         * enemy set to owner! 
         */
        pet->enemy = 0;
      else
        return tmp;
    }

  get_search_arr (search_arr);

  if (owner->type == PLAYER && owner->contr->petmode > pet_normal)
    {
      if (owner->contr->petmode == pet_sad)
        {
          tmp = find_nearest_living_creature (pet);
          if (tmp != 0)
            {
              get_rangevector (pet, tmp, rv, 0);
              if (check_enemy (pet, rv) != 0)
                return tmp;
              else
                pet->enemy = 0;
            }
          /* if we got here we have no enemy */
          /* we return 0 to avoid heading back to the owner */
          pet->enemy = 0;
          return 0;
        }
    }

  /* Since the pet has no existing enemy, look for anything nasty 
   * around the owner that it should go and attack. (if the owner is
   * still on a map)
   */
  if (!owner->flag [FLAG_REMOVED])
    {
      tmp3 = 0;

      for (i = 0; i < SIZEOFFREE; i++)
        {
          x = owner->x + freearr_x[search_arr[i]];
          y = owner->y + freearr_y[search_arr[i]];
          nm = owner->map;
          /* Only look on the space if there is something alive there. */
          mflags = get_map_flags (nm, &nm, x, y, &x, &y);

          if (!(mflags & P_OUT_OF_MAP) && mflags & P_IS_ALIVE)
            {
              for (tmp = GET_MAP_OB (nm, x, y); tmp != 0; tmp = tmp->above)
                {
                  object *tmp2 = tmp->head == 0 ? tmp : tmp->head;

                  if (QUERY_FLAG (tmp2, FLAG_ALIVE) && ((!QUERY_FLAG (tmp2, FLAG_FRIENDLY) &&
                                                         (tmp2->type != PLAYER)) ||
                                                        should_arena_attack (pet, owner, tmp2))
                      && !QUERY_FLAG (tmp2, FLAG_UNAGGRESSIVE) && tmp2 != pet && tmp2 != owner && can_detect_enemy (pet, tmp2, rv))
                    {

                      if (!can_see_enemy (pet, tmp2))
                        {
                          if (tmp3 != 0)
                            tmp3 = tmp2;
                        }
                      else
                        {
                          pet->enemy = tmp2;
                          if (check_enemy (pet, rv) != 0)
                            return tmp2;
                          else
                            pet->enemy = 0;
                        }
                    }               /* if this is a valid enemy */
                }                   /* for objects on this space */
            }                       /* if there is something living on this space */
        }                           /* for loop of spaces around the owner */

      /* fine, we went through the whole loop and didn't find one we could
         see, take what we have */
      if (tmp3 != 0)
        {
          pet->enemy = tmp3;
          if (check_enemy (pet, rv) != 0)
            return tmp3;
          else
            pet->enemy = 0;
        }
    }

  /* No threat to owner, check to see if the pet has an attacker */
  if (attacker)
    {
      /* also need to check to make sure it is not freindly */
      /* or otherwise non-hostile, and is an appropriate target */
      if (!QUERY_FLAG (attacker, FLAG_FRIENDLY) && on_same_map (pet, attacker))
        {
          pet->enemy = attacker;

          if (check_enemy (pet, rv) != 0)
            return attacker;
          else
            pet->enemy = 0;
        }
    }

  /* Don't have an attacker or legal enemy, so look for a new one!.
   * This looks for one around where the pet is.  Thus, you could lead
   * a pet to danger, then take a few steps back.  This code is basically
   * the same as the code that looks around the owner.
   */
  if (owner->type == PLAYER && owner->contr->petmode != pet_defend)
    {
      tmp3 = 0;
      for (i = 0; i < SIZEOFFREE; i++)
        {
          x = pet->x + freearr_x[search_arr[i]];
          y = pet->y + freearr_y[search_arr[i]];
          nm = pet->map;
          /* Only look on the space if there is something alive there. */
          mflags = get_map_flags (nm, &nm, x, y, &x, &y);
          if (!(mflags & P_OUT_OF_MAP) && mflags & P_IS_ALIVE)
            {
              for (tmp = GET_MAP_OB (nm, x, y); tmp != 0; tmp = tmp->above)
                {
                  object *tmp2 = tmp->head == 0 ? tmp : tmp->head;

                  if (QUERY_FLAG (tmp2, FLAG_ALIVE) && ((!QUERY_FLAG (tmp2, FLAG_FRIENDLY) &&
                                                         (tmp2->type != PLAYER)) ||
                                                        should_arena_attack (pet, owner, tmp2))
                      && !QUERY_FLAG (tmp2, FLAG_UNAGGRESSIVE) && tmp2 != pet && tmp2 != owner && can_detect_enemy (pet, tmp2, rv))
                    {

                      if (!can_see_enemy (pet, tmp2))
                        {
                          if (tmp3 != 0)
                            tmp3 = tmp2;
                        }
                      else
                        {
                          pet->enemy = tmp2;
                          if (check_enemy (pet, rv) != 0)
                            return tmp2;
                          else
                            pet->enemy = 0;
                        }
                    }           /* make sure we can get to the bugger */
                }               /* for objects on this space */
            }                   /* if there is something living on this space */
        }                       /* for loop of spaces around the pet */

      /* fine, we went through the whole loop and didn't find one we could
         see, take what we have */
      if (tmp3 != 0)
        {
          pet->enemy = tmp3;
          if (check_enemy (pet, rv) != 0)
            return tmp3;
          else
            pet->enemy = 0;
        }
    }                           /* pet in defence mode */

  object *enemy = check_enemy (pet, rv);
  // we have a summoned pet here and the owners enemy isn't set or can't
  // be reached => search for a player around us and set it as our new enemy!!
  if (!enemy && pet->owner && pet->owner->type != PLAYER)
    enemy = get_nearest_player (pet);

  /* Didn't find anything - return the owner's enemy or 0 */
  return enemy;
}

void
terminate_all_pets (object *owner)
{
  objectlink *obl, *next;

  for (obl = first_friendly_object; obl; obl = next)
    {
      object *ob = obl->ob;
      next = obl->next;

      if (ob->owner == owner)
        ob->destroy ();
    }
}

/*
 * Unfortunately, sometimes, the owner of a pet is in the
 * process of entering a new map when this is called.
 * Thus the map isn't loaded yet, and we have to remove
 * the pet...
 * Interesting enough, we don't use the passed map structure in
 * this function.
 */
void
remove_all_pets (maptile *map)
{
  objectlink *obl, *next;
  object *owner;

  for (obl = first_friendly_object; obl; obl = next)
    {
      next = obl->next;

      if (obl->ob->type != PLAYER
          && QUERY_FLAG (obl->ob, FLAG_FRIENDLY)
          && (owner = obl->ob->owner) != 0
          && !on_same_map (owner, obl->ob))
        {
          /* follow owner checks map status for us */
          follow_owner (obl->ob, owner);
        }
    }
}

int
follow_owner (object *ob, object *owner)
{
  if (owner->flag [FLAG_REMOVED])
    return 0; // do nothing if the owner is removed
  else if (owner->map->in_memory != MAP_IN_MEMORY)
    LOG (llevError, "Owner of the pet not on a map in memory!?\n");
  else
    {
      int dir = find_free_spot (ob, owner->map, owner->x, owner->y, 1, SIZEOFFREE);

      if (dir >= 0)
        {
          owner->map->insert (ob, owner->x + freearr_x[dir], owner->y + freearr_y[dir]);

          if (owner->type == PLAYER)    /* Uh, I hope this is always true... */
            new_draw_info (NDI_UNIQUE, 0, owner, "Your pet magically appears next to you");

          return 0;
        }
    }

  ob->destroy ();
  return 1;
}

void
pet_move (object *ob)
{
  int dir = 0, i;
  sint16 dx, dy;
  object *ob2, *owner;
  maptile *m;

  /* Check to see if player pulled out */
  if ((owner = ob->owner) == NULL)
    {
      ob->destroy ();
      LOG (llevMonster, "Pet: no owner, leaving.\n");
      return;
    }

  /* move monster into the owners map if not in the same map
   * except when the owner is removed.
   */
  if (!on_same_map (ob, owner) && !owner->flag [FLAG_REMOVED])
    {
      follow_owner (ob, owner);
      return;
    }
  /* Calculate Direction */
  if (owner->type == PLAYER && owner->contr->petmode == pet_sad)
    {
      /* in S&D mode, if we have no enemy, run randomly about. */
      for (i = 0; i < 15; i++)
        {
          dir = rndm (1, 8);
          dx = ob->x + freearr_x[dir];
          dy = ob->y + freearr_y[dir];
          m = ob->map;
          if (get_map_flags (ob->map, &m, dx, dy, &dx, &dy) & P_OUT_OF_MAP)
            continue;
          else if (OB_TYPE_MOVE_BLOCK (ob, GET_MAP_MOVE_BLOCK (m, dx, dy)))
            continue;
          else
            break;
        }
    }
  else if (!owner->flag [FLAG_REMOVED]) // only get vector to owner when owner not removed
    {
      struct rv_vector rv;

      get_rangevector (ob, ob->owner, &rv, 0);
      dir = rv.direction;
    }
  ob->direction = dir;

  /* move_ob returns 0 if the object couldn't move.  If that is the
   * case, lets do some other work.
   */
  if (!(move_ob (ob, dir, ob)))
    {
      object *part;

      /* the failed move_ob above may destroy the pet, so check here */
      if (ob->destroyed ())
        return;

      for (part = ob; part != NULL; part = part->more)
        {
          dx = part->x + freearr_x[dir];
          dy = part->y + freearr_y[dir];
          m = get_map_from_coord (part->map, &dx, &dy);
          if (!m)
            continue;

          for (ob2 = GET_MAP_OB (m, dx, dy); ob2 != NULL; ob2 = ob2->above)
            {
              object *new_ob;

              new_ob = ob2->head ? ob2->head : ob2;
              if (new_ob == ob)
                break;
              if (new_ob == ob->owner)
                return;
              if (new_ob->owner == ob->owner)
                break;

              /* Hmm.  Did we try to move into an enemy monster?  If so,
               * make it our enemy.
               */
              if (QUERY_FLAG (new_ob, FLAG_ALIVE) && !QUERY_FLAG (ob, FLAG_UNAGGRESSIVE)
                  && !QUERY_FLAG (new_ob, FLAG_UNAGGRESSIVE) && !QUERY_FLAG (new_ob, FLAG_FRIENDLY))
                {

                  ob->enemy = new_ob;
                  if (new_ob->enemy == NULL)
                    new_ob->enemy = ob;
                  return;
                }
              else if (new_ob->type == PLAYER)
                {
                  new_draw_info (NDI_UNIQUE, 0, new_ob, "You stand in the way of someones pet.");
                  return;
                }
            }
        }
      /* Try a different course */
      dir = absdir (dir + 4 - (rndm (5)) - (rndm (5)));
      (void) move_ob (ob, dir, ob);
    }
  return;
}

/****************************************************************************
 *
 * GOLEM SPELL CODE
 *
 ****************************************************************************/

/* fix_summon_pet() - this makes multisquare/single square monsters
 * proper for map insertion. 
 * at is the archetype, op is the caster of the spell, dir is the
 * direction the monster should be placed in.
 * is_golem is to note that this is a golem spell.
 */
object *
fix_summon_pet (archetype *at, object *op, int dir, int is_golem)
{
  archetype *atmp;
  object *tmp = NULL, *prev = NULL, *head = NULL;

  for (atmp = at; atmp; atmp = atmp->more)
    {
      tmp = arch_to_object (atmp);

      if (atmp == at)
        {
          if (!is_golem)
            SET_FLAG (tmp, FLAG_MONSTER);

          tmp->set_owner (op);
          if (op->type == PLAYER)
            {
              tmp->stats.exp = 0;
              add_friendly_object (tmp);
              if (is_golem)
                CLEAR_FLAG (tmp, FLAG_MONSTER);
            }
          else
            {
              if (QUERY_FLAG (op, FLAG_FRIENDLY))
                {
                  object *owner = op->owner;

                  if (owner)
                    {           /* For now, we transfer ownership */
                      tmp->set_owner (owner);
                      tmp->attack_movement = PETMOVE;
                      add_friendly_object (tmp);
                    }
                }
            }

          if (op->type != PLAYER || !is_golem)
            {
              tmp->attack_movement = PETMOVE;
              tmp->speed_left = -1;
              tmp->type = 0;
              tmp->enemy = op->enemy;
            }
          else
            tmp->type = GOLEM;

        }

      if (!head)
        head = tmp;

      tmp->x = op->x + freearr_x[dir] + tmp->arch->clone.x;
      tmp->y = op->y + freearr_y[dir] + tmp->arch->clone.y;
      tmp->map = op->map;

      if (tmp->invisible)
        tmp->invisible = 0;

      if (head != tmp)
        tmp->head = head, prev->more = tmp;

      prev = tmp;
    }

  head->direction = dir;

  /* need to change some monster attr to prevent problems/crashing */
  head->last_heal = 0;
  head->last_eat = 0;
  head->last_grace = 0;
  head->last_sp = 0;
  head->other_arch = NULL;
  head->stats.exp = 0;
  CLEAR_FLAG (head, FLAG_CHANGING);
  CLEAR_FLAG (head, FLAG_STAND_STILL);
  CLEAR_FLAG (head, FLAG_GENERATOR);
  CLEAR_FLAG (head, FLAG_SPLITTING);
  if (head->attacktype & AT_GHOSTHIT)
    head->attacktype = (AT_PHYSICAL | AT_DRAIN);

  return head;
}

/* updated this to allow more than the golem 'head' to attack */
/* op is the golem to be moved. */
void
move_golem (object *op)
{
  int made_attack = 0;
  object *tmp;

  if (QUERY_FLAG (op, FLAG_MONSTER))
    return;                     /* Has already been moved */

  if (!op->owner)
    {
      LOG (llevDebug, "Golem without owner destructed.\n");
      op->remove ();
      op->destroy ();
      return;
    }

  /* It would be nice to have a cleaner way of what message to print
   * when the golem expires than these hard coded entries.
   * Note it is intentional that a golems duration is based on its
   * hp, and not duration
   */
  if (--op->stats.hp < 0)
    {
      if (op->msg)
        new_draw_info (NDI_UNIQUE, 0, op->owner, op->msg);

      op->destroy ();
      return;
    }

  /* Do golem attacks/movement for single & multisq golems. 
   * Assuming here that op is the 'head' object. Pass only op to 
   * move_ob (makes recursive calls to other parts) 
   * move_ob returns 0 if the creature was not able to move.
   */
  if (move_ob (op, op->direction, op))
    return;

  if (op->destroyed ())
    return;

  for (tmp = op; tmp; tmp = tmp->more)
    {
      sint16 x = tmp->x + freearr_x[op->direction], y = tmp->y + freearr_y[op->direction];
      object *victim;
      maptile *m;
      int mflags;

      m = op->map;
      mflags = get_map_flags (m, &m, x, y, &x, &y);

      if (mflags & P_OUT_OF_MAP)
        continue;

      for (victim = GET_MAP_OB (op->map, x, y); victim; victim = victim->above)
        if (QUERY_FLAG (victim, FLAG_ALIVE))
          break;

      /* We used to call will_hit_self to make sure we don't
       * hit ourselves, but that didn't work, and I don't really
       * know if that was more efficient anyways than this.
       * This at least works.  Note that victim->head can be NULL,
       * but since we are not trying to dereferance that pointer,
       * that isn't a problem.
       */
      if (victim && victim != op && victim->head != op)
        {
          /* for golems with race fields, we don't attack
           * aligned races 
           */

          if (victim->race && op->race && strstr (op->race, victim->race))
            {
              if (op->owner)
                new_draw_info_format (NDI_UNIQUE, 0, op->owner, "%s avoids damaging %s.", &op->name, &victim->name);
            }
          else if (victim == op->owner)
            {
              if (op->owner)
                new_draw_info_format (NDI_UNIQUE, 0, op->owner, "%s avoids damaging you.", &op->name);
            }
          else
            {
              attack_ob (victim, op);
              made_attack = 1;
            }
        }                       /* If victim */
    }

  if (made_attack)
    update_object (op, UP_OBJ_FACE);
}

/* this is a really stupid function when you get down and
 * look at it.  Keep it here for the time being - makes life
 * easier if we ever decide to do more interesting thing with
 * controlled golems.
 */
void
control_golem (object *op, int dir)
{
  op->direction = dir;
}

/* summon golem: summons a monster for 'op'.  caster is the object
 * casting the spell, dir is the direction to place the monster,
 * at is the archetype of the monster, and spob is the spell
 * object.  At this stage, all spob is really used for is to
 * adjust some values in the monster.
 */
int
summon_golem (object *op, object *caster, int dir, object *spob)
{
  object *tmp, *god = NULL;
  archetype *at;
  char buf[MAX_BUF];

  /* Because there can be different golem spells, player may want to
   * 'lose' their old golem.
   */
  if (op->type == PLAYER && op->contr->ranges[range_golem])
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You dismiss your existing golem.");
      op->contr->ranges[range_golem]->remove ();
      op->contr->ranges[range_golem]->destroy ();
      op->contr->ranges[range_golem] = 0;
    }

  if (spob->other_arch)
    at = spob->other_arch;
  else if (spob->race)
    {
      god = find_god (determine_god (caster));

      if (!god)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "You must worship a god to cast %s.", &spob->name);
          return 0;
        }

      at = determine_holy_arch (god, spob->race);

      if (!at)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "%s has no %s for you to call.", &god->name, &spob->race);
          return 0;
        }
    }
  else
    {
      LOG (llevError, "Spell %s lacks other_arch\n", &spob->name);
      return 0;
    }

  if (!dir)
    dir = find_free_spot (&at->clone, op->map, op->x, op->y, 1, SIZEOFFREE1 + 1);

  if (dir < 0 || ob_blocked (&at->clone, op->map, op->x + freearr_x[dir], op->y + freearr_y[dir]))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "There is something in the way.");
      return 0;
    }

  /* basically want to get proper map/coordinates for this object */

  if (!(tmp = fix_summon_pet (at, op, dir, GOLEM)))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Your spell fails.");
      return 0;
    }

  if (op->type == PLAYER)
    {
      tmp->type = GOLEM;
      tmp->set_owner (op);
      op->contr->ranges[range_golem] = tmp;
      /* give the player control of the golem */
      op->contr->shoottype = range_golem;
      set_spell_skill (op, caster, spob, tmp);
    }
  else
    {
      if (QUERY_FLAG (op, FLAG_FRIENDLY))
        {
          object *owner = op->owner;

          if (owner)
            {                   /* For now, we transfer ownership */
              tmp->set_owner (owner);
              tmp->attack_movement = PETMOVE;
              add_friendly_object (tmp);
            }
        }

      SET_FLAG (tmp, FLAG_MONSTER);
    }

  /* make the speed positive. */
  tmp->speed = FABS (tmp->speed);

  /*  This sets the level dependencies on dam and hp for monsters */
  /* players can't cope with too strong summonings. */
  /* but monsters can.  reserve these for players. */
  if (op->type == PLAYER)
    {
      tmp->stats.hp += spob->duration + SP_level_duration_adjust (caster, spob);

      if (!spob->stats.dam)
        tmp->stats.dam += SP_level_dam_adjust (caster, spob);
      else
        tmp->stats.dam = spob->stats.dam + SP_level_dam_adjust (caster, spob);

      tmp->speed += .02 * SP_level_range_adjust (caster, spob);
      tmp->speed = MIN (tmp->speed, 1.0);

      if (spob->attacktype)
        tmp->attacktype = spob->attacktype;
    }

  tmp->stats.wc -= SP_level_range_adjust (caster, spob);

  /* limit the speed to 0.3 for non-players, 1 for players. */

  /* make experience increase in proportion to the strength.
   * this is a bit simplistic - we are basically just looking at how
   * often the sp doubles and use that as the ratio.
   */
  tmp->stats.exp *= 1 + (MAX (spob->stats.maxgrace, spob->stats.sp) / caster_level (caster, spob));
  tmp->speed_left = 0;
  tmp->direction = dir;

  /* Holy spell - some additional tailoring */
  if (god)
    {
      object *tmp2;

      sprintf (buf, "%s of %s", &spob->name, &god->name);
      buf[0] = toupper (buf[0]);

      for (tmp2 = tmp; tmp2; tmp2 = tmp2->more)
        tmp2->name = buf;

      tmp->attacktype |= god->attacktype;
      memcpy (tmp->resist, god->resist, sizeof (tmp->resist));
      tmp->race = god->race;
      tmp->slaying = god->slaying;

      /* safety, we must allow a god's servants some reasonable attack */
      if (!(tmp->attacktype & AT_PHYSICAL))
        tmp->attacktype |= AT_PHYSICAL;
    }

  insert_ob_in_map (tmp, tmp->map, op, 0);
  return 1;
}


/***************************************************************************
 *
 * Summon monster/pet/other object code
 *
 ***************************************************************************/

/* Returns a monster (chosen at random) that this particular player (and his
 * god) find acceptable.  This checks level, races allowed by god, etc
 * to determine what is acceptable.
 * This returns NULL if no match was found.
 */

object *
choose_cult_monster (object *pl, object *god, int summon_level)
{
  char buf[MAX_BUF];
  const char *race;
  int racenr, mon_nr, i;
  racelink *list;
  objectlink *tobl;
  object *otmp;

  /* Determine the number of races available */
  racenr = 0;
  strcpy (buf, god->race);
  race = strtok (buf, ",");
  while (race)
    {
      racenr++;
      race = strtok (NULL, ",");
    }

  /* next, randomly select a race from the aligned_races string */
  if (racenr > 1)
    {
      racenr = rndm (0, racenr - 1);
      strcpy (buf, god->race);
      race = strtok (buf, ",");
      for (i = 0; i < racenr; i++)
        race = strtok (NULL, ",");
    }
  else
    race = god->race;


  /* see if a we can match a race list of monsters.  This should not
   * happen, so graceful recovery isn't really needed, but this sanity
   * checking is good for cases where the god archetypes mismatch the
   * race file
   */
  if ((list = find_racelink (race)) == NULL)
    {
      new_draw_info_format (NDI_UNIQUE, 0, pl, "The spell fails! %s's creatures are beyond the range of your summons", &god->name);
      LOG (llevDebug, "choose_cult_monster() requested non-existent aligned race!\n");
      return 0;
    }

  /* search for an apprplritate monster on this race list */
  mon_nr = 0;
  for (tobl = list->member; tobl; tobl = tobl->next)
    {
      otmp = tobl->ob;
      if (!otmp || !QUERY_FLAG (otmp, FLAG_MONSTER))
        continue;
      if (otmp->level <= summon_level)
        mon_nr++;
    }

  /* If this god has multiple race entries, we should really choose another.
   * But then we either need to track which ones we have tried, or just
   * make so many calls to this function, and if we get so many without
   * a valid entry, assuming nothing is available and quit.
   */
  if (!mon_nr)
    return NULL;

  mon_nr = rndm (0, mon_nr - 1);
  for (tobl = list->member; tobl; tobl = tobl->next)
    {
      otmp = tobl->ob;
      if (!otmp || !QUERY_FLAG (otmp, FLAG_MONSTER))
        continue;
      if (otmp->level <= summon_level && !mon_nr--)
        return otmp;
    }
  /* This should not happen */
  LOG (llevDebug, "choose_cult_monster() mon_nr was set, but did not find a monster\n");
  return NULL;
}

int
summon_object (object *op, object *caster, object *spell_ob, int dir, const char *stringarg)
{
  sint16 x, y, nrof = 1, i;
  archetype *summon_arch;
  int ndir;

  if (spell_ob->other_arch)
    summon_arch = spell_ob->other_arch;
  else if (spell_ob->randomitems)
    {
      int level = caster_level (caster, spell_ob);
      treasure *tr, *lasttr = NULL;

      shstr_cmp sparam (stringarg);

      /* In old code, this was a very convoluted for statement,   
       * with all the checks in the 'for' portion itself.  Much
       * more readable to break some of the conditions out.
       */
      for (tr = spell_ob->randomitems->items; tr; tr = tr->next)
        {
          if (!tr->item)
            continue;

          if (level < tr->magic)
            break;

          lasttr = tr;

          if (tr->item->name == sparam)
            break;
        }

      if (!lasttr)
        {
          LOG (llevError, "Treasurelist %s did not generate a valid entry in summon_object\n", &spell_ob->randomitems->name);
          new_draw_info (NDI_UNIQUE, 0, op, "The spell fails to summon any monsters.");
          return 0;
        }

      summon_arch = lasttr->item;
      nrof        = lasttr->nrof;
    }
  else if (spell_ob->race && !strcmp (spell_ob->race, "GODCULTMON"))
    {
      object *god = find_god (determine_god (op)), *mon, *owner;
      int summon_level, tries;

      if (!god && ((owner = op->owner) != NULL))
        god = find_god (determine_god (owner));

      /* If we can't find a god, can't get what monster to summon */
      if (!god)
        return 0;

      if (!god->race)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "%s has no creatures that you may summon!", &god->name);
          return 0;
        }

      /* the summon level */
      summon_level = caster_level (caster, spell_ob);
      if (summon_level == 0)
        summon_level = 1;

      tries = 0;
      do
        {
          mon = choose_cult_monster (op, god, summon_level);
          if (!mon)
            {
              new_draw_info_format (NDI_UNIQUE, 0, op, "%s fails to send anything.", &god->name);
              return 0;
            }

          ndir = dir;

          if (!ndir)
            ndir = find_free_spot (mon, op->map, op->x, op->y, 1, SIZEOFFREE);

          if (ndir < 0 || ob_blocked (mon, op->map, op->x + freearr_x[ndir], op->y + freearr_y[ndir]))
            {
              ndir = -1;
              if (++tries == 5)
                {
                  new_draw_info (NDI_UNIQUE, 0, op, "There is something in the way.");
                  return 0;
                }
            }
        }
      while (ndir == -1);

      if (mon->level > (summon_level / 2))
        nrof = random_roll (1, 2, op, PREFER_HIGH);
      else
        nrof = die_roll (2, 2, op, PREFER_HIGH);

      summon_arch = mon->arch;
    }
  else
    summon_arch = 0;

  if (spell_ob->stats.dam)
    nrof += spell_ob->stats.dam + SP_level_dam_adjust (caster, spell_ob);

  if (!summon_arch)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "There is no monsters available for summoning.");
      return 0;
    }

  for (i = 1; i <= nrof; i++)
    {
      archetype *atmp;
      object *prev = NULL, *head = NULL, *tmp;

      if (dir)
        {
          ndir = dir;
          dir = absdir (dir + 1);
        }
      else
        ndir = find_free_spot (&summon_arch->clone, op->map, op->x, op->y, 1, SIZEOFFREE);

      if (ndir > 0)
        {
          x = freearr_x[ndir];
          y = freearr_y[ndir];
        }

      if (ndir < 0 || ob_blocked (&summon_arch->clone, op->map, op->x + x, op->y + y))
        {
          new_draw_info (NDI_UNIQUE, 0, op, "There is something in the way.");
          if (nrof > 1)
            new_draw_info (NDI_UNIQUE, 0, op, "No more pets for this casting.");

          return nrof > 1;
        }

      for (atmp = summon_arch; atmp != NULL; atmp = atmp->more)
        {
          tmp = arch_to_object (atmp);
          if (atmp == summon_arch)
            {
              if (QUERY_FLAG (tmp, FLAG_MONSTER))
                {
                  tmp->set_owner (op);
                  set_spell_skill (op, caster, spell_ob, tmp);
                  tmp->enemy = op->enemy;
                  tmp->type = 0;
                  CLEAR_FLAG (tmp, FLAG_SLEEP);

                  if (op->type == PLAYER || QUERY_FLAG (op, FLAG_FRIENDLY))
                    {
                      /* If this is not set, we make it friendly */
                      if (!QUERY_FLAG (spell_ob, FLAG_MONSTER))
                        {
                          add_friendly_object (tmp);
                          tmp->stats.exp = 0;

                          if (spell_ob->attack_movement)
                            tmp->attack_movement = spell_ob->attack_movement;

                          if (op->owner)
                            tmp->set_owner (op->owner);
                        }
                    }
                }

              if (tmp->speed > MIN_ACTIVE_SPEED)
                tmp->speed_left = -1;
            }

          if (head == NULL)
            head = tmp;
          else
            {
              tmp->head = head;
              prev->more = tmp;
            }

          prev = tmp;
          tmp->x = op->x + x + tmp->arch->clone.x;
          tmp->y = op->y + y + tmp->arch->clone.y;
          tmp->map = op->map;
        }

      head->direction = freedir[ndir];
      head->stats.exp = 0;
      head = insert_ob_in_map (head, head->map, op, 0);

      if (head && head->randomitems)
        {
          create_treasure (head->randomitems, head, GT_APPLY | GT_STARTEQUIP, 6, 0);

          for (object *tmp = head->inv; tmp; tmp = tmp->below)
            SET_FLAG (tmp, FLAG_DESTROY_ON_DEATH);
        }
    }                           /* for i < nrof */

  return 1;
}

/* recursively look through the owner property of objects until the real owner
is found */
object *
get_real_owner (object *ob)
{
  object *realowner = ob;

  if (realowner == NULL)
    return NULL;

  while (realowner->owner != NULL)
    {
      realowner = realowner->owner;
    }
  return realowner;
}

/* determines if checks so pets don't attack players or other pets should be
overruled by the arena petmode */
int
should_arena_attack (object *pet, object *owner, object *target)
{
  object *rowner, *towner;

  /* exit if the target, pet, or owner is null. */
  if ((target == NULL) || (pet == NULL) || (owner == NULL))
    return 0;

  /* get the owners of itself and the target, this is to deal with pets of
     pets */
  rowner = get_real_owner (owner);
  towner = target->type == PLAYER ? 0 : get_real_owner (target);

  /* if the pet has now owner, exit with error */
  if (!rowner)
    {
      LOG (llevError, "Pet has no owner.\n");
      return 0;
    }

  /* if the target is not a player, and has no owner, we shouldn't be here
   */
  if ((towner == NULL) && (target->type != PLAYER))
    {
      LOG (llevError, "Target is not a player but has no owner. We should not be here.\n");
      return 0;
    }

  /* make sure that the owner is a player */
  if (rowner->type != PLAYER)
    return 0;

  /* abort if the petmode is not arena */
  if (rowner->contr->petmode != pet_arena)
    return 0;

  /* abort if the pet, it's owner, or the target is not on battleground */
  if (!(op_on_battleground (pet, NULL, NULL) && op_on_battleground (owner, NULL, NULL) && op_on_battleground (target, NULL, NULL)))
    return 0;

  /* if the target is a monster, make sure it's owner is not the same */
  if ((target->type != PLAYER) && (rowner == towner))
    return 0;

  /* check if the target is a player which affects how it will handle
     parties */
  if (target->type != PLAYER)
    {
      /* if the target is owned by a player make sure than make sure
         it's not in the same party */
      if ((towner->type == PLAYER) && (rowner->contr->party != NULL))
        {
          if (rowner->contr->party == towner->contr->party)
            return 0;
        }
    }
  else
    {
      /* if the target is a player make sure than make sure it's not
         in the same party */
      if (rowner->contr->party != NULL)
        {
          if (rowner->contr->party == target->contr->party)
            return 0;
        }
    }

  return 1;
}
Revision:	1.29
Committed:	Tue Apr 24 12:32:16 2007 UTC (17 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.28:	+9 -28 lines
Log Message:	server crashed this morning because a freed golem tried to follow his owner, triggering the assertion failure. the golem had no owner, but the owner still had him in his range slots. I refactored a bit of the code and rearranged it to hopefully increase chances of this not occuring again.