server/server/build_map.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2001 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 to <crossfire@schmorp.de>
*/

#include <global.h>
#include <living.h>
#include <spells.h>
#include <skills.h>
#include <tod.h>
#include <sproto.h>

/**
 *  Check if objects on a square interfere with building
 */
int
can_build_over (maptile *map, object *tmp, short x, short y)
{
  object *ob;

  ob = GET_MAP_OB (map, x, y);
  while (ob)
    {
      /* if ob is not a marking rune or floor, then check special cases */
      if (strcmp (ob->arch->name, "rune_mark") && ob->type != FLOOR)
        {
          switch (tmp->type)
            {
                case SIGN:
                case MAGIC_EAR:
                  /* Allow signs and magic ears to be built on books */
                  if (ob->type != BOOK)
                    {
                      return 0;
                    }
                  break;
                case BUTTON:
                case DETECTOR:
                case PEDESTAL:
                case CF_HANDLE:
                  /* Allow buttons and levers to be built under gates */
                  if (ob->type != GATE && ob->type != DOOR)
                    {
                      return 0;
                    }
                  break;
                default:
                  return 0;
            }
        }
      ob = ob->above;
    }
  return 1;
}

/**
 *  Erases marking runes at specified location
 */
void
remove_marking_runes (maptile *map, short x, short y)
{
  object *rune;
  object *next;

  rune = GET_MAP_OB (map, x, y);
  while (rune)
    {
      next = rune->above;

      if ((rune->type == SIGN) && (!strcmp (rune->arch->name, "rune_mark")))
        rune->destroy ();

      rune = next;
    }
}

/**
 * Returns an unused value for 'connected'.
 * \param map: map for which to find a value
 * \return 'connected' value with no item, or -1 if failure.
 *
 * Tries 1000 random values, then returns -1.
 */
int
find_unused_connected_value (maptile *map)
{
  int connected = 0;
  int itest = 0;
  oblinkpt *obp;

  while (itest++ < 1000)
    {
      connected = 1 + rand () % 20000;
      for (obp = map->buttons; obp && (obp->value != connected); obp = obp->next);

      if (!obp)
        return connected;
    }

  return -1;
}


/**
 * Helper function for door/button/connected item building.
 *
 * Will search the specified spot for a marking rune.
 * If not found, returns -1
 * Else, searches a force in op's inventory matching the map's name
 * and the rune's text.
 * If found, returns the connection value associated
 * else searches a new connection value, and adds the force to the player.
 */
int
find_or_create_connection_for_map (object *pl, short x, short y, object *rune)
{
  object *force;
  int connected;

  if (!rune)
    rune = get_connection_rune (pl, x, y);

  if (!rune)
    {
      new_draw_info (NDI_UNIQUE, 0, pl, "You need to put a marking rune with the group name.");
      return -1;
    }

  /* Now, find force in player's inventory */
  force = pl->inv;
  while (force
         && ((force->type != FORCE) || (!force->slaying) || (strcmp (force->slaying, pl->map->path)) || (!force->msg)
             || (strcmp (force->msg, rune->msg))))
    force = force->below;

  if (!force)
    /* No force, need to create & insert one */
    {
      /* Find unused value */
      connected = find_unused_connected_value (pl->map);
      if (connected == -1)
        {
          new_draw_info (NDI_UNIQUE, 0, pl, "Could not create more groups.");
          return -1;
        }

      force = get_archetype (FORCE_NAME);
      force->speed = 0;
      update_ob_speed (force);
      force->slaying = pl->map->path;
      force->msg = rune->msg;
      force->path_attuned = connected;
      insert_ob_in_ob (force, pl);

      return connected;
    }

  /* Found the force, everything's easy. */
  return force->path_attuned;
}

/**
 * Returns the marking rune on the square, for purposes of building connections
 */
object *
get_connection_rune (object *pl, short x, short y)
{
  object *rune;

  rune = GET_MAP_OB (pl->map, x, y);
  while (rune && ((rune->type != SIGN) || (strcmp (rune->arch->name, "rune_mark"))))
    rune = rune->above;
  return rune;
}

/**
 * Returns the book/scroll on the current square, for purposes of building
 */
object *
get_msg_book (object *pl, short x, short y)
{
  object *book;

  book = GET_MAP_OB (pl->map, x, y);
  while (book && (book->type != BOOK))
    book = book->above;
  return book;
}

/**
 * Returns first item of type BUILDABLE_WALL.
 */
object *
get_wall (maptile *map, int x, int y)
{
  object *wall;

  wall = GET_MAP_OB (map, x, y);
  while (wall && (BUILDABLE_WALL != wall->type))
    wall = wall->above;

  return wall;
}

/**
 *   Fixes walls around specified spot
 *
 *   \param map is the map
 *   \param x
 *   \param y are the position to fix
 *
 *   Basically it ensures the correct wall is put where needed.
 *
 *   Note: x & y must be valid map coordinates.
 */
void
fix_walls (maptile *map, int x, int y)
{
  int connect;
  object *wall;
  char archetype[MAX_BUF];
  char *underscore;
  uint32 old_flags[4];
  struct archetype *new_arch;
  int flag;


  /* First, find the wall on that spot */
  wall = get_wall (map, x, y);
  if (!wall)
    /* Nothing -> bail out */
    return;

  /* Find base name */
  strcpy (archetype, wall->arch->name);
  underscore = strchr (archetype, '_');

  /* search for the first _ before a number */
  while (underscore && !isdigit (*(underscore + 1)))
    underscore = strchr (underscore + 1, '_');

  if (!underscore || !isdigit (*(underscore + 1)))
    /* Not in a format we can change, bail out */
    return;

  underscore++;
  *underscore = '\0';

  connect = 0;

  if ((x > 0) && get_wall (map, x - 1, y))
    connect |= 1;
  if ((x < MAP_WIDTH (map) - 1) && get_wall (map, x + 1, y))
    connect |= 2;

  if ((y > 0) && get_wall (map, x, y - 1))
    connect |= 4;

  if ((y < MAP_HEIGHT (map) - 1) && get_wall (map, x, y + 1))
    connect |= 8;

  switch (connect)
    {
        case 0:
          strcat (archetype, "0");

          break;
        case 1:
          strcat (archetype, "1_3");

          break;
        case 2:
          strcat (archetype, "1_4");

          break;
        case 3:
          strcat (archetype, "2_1_2");

          break;
        case 4:
          strcat (archetype, "1_2");

          break;
        case 5:
          strcat (archetype, "2_2_4");

          break;
        case 6:
          strcat (archetype, "2_2_1");

          break;
        case 7:
          strcat (archetype, "3_1");

          break;
        case 8:
          strcat (archetype, "1_1");

          break;
        case 9:
          strcat (archetype, "2_2_3");

          break;
        case 10:
          strcat (archetype, "2_2_2");

          break;
        case 11:
          strcat (archetype, "3_3");

          break;
        case 12:
          strcat (archetype, "2_1_1");

          break;
        case 13:
          strcat (archetype, "3_4");

          break;
        case 14:
          strcat (archetype, "3_2");

          break;
        case 15:
          strcat (archetype, "4");

          break;
    }

  /*
   * Before anything, make sure the archetype does exist...
   * If not, prolly an error...
   */
  new_arch = archetype::find (archetype);

  if (!new_arch)
    return;

  /* Now delete current wall, and insert new one 
   * We save flags to avoid any trouble with buildable/non buildable, and so on
   */
  for (flag = 0; flag < 4; flag++)
    old_flags[flag] = wall->flags[flag];

  wall->destroy ();

  wall = arch_to_object (new_arch);
  wall->type = BUILDABLE_WALL;
  insert_ob_in_map_at (wall, map, NULL, INS_ABOVE_FLOOR_ONLY, x, y);
  for (flag = 0; flag < 4; flag++)
    wall->flags[flag] = old_flags[flag];
}

/**
 *   \brief Floor building function
 *
 *   Floors can be build:
 *    - on existing floors, with or without a detector/button
 *    - on an existing wall, with or without a floor under it
 *
 *   Note: this function will inconditionally change squares around (x, y)
 *    so don't call it with x == 0 for instance!
 */
void
apply_builder_floor (object *pl, object *material, short x, short y)
{
  object *tmp, *above;
  object *above_floor;          /* Item above floor, if any */
  struct archetype *new_floor;
  struct archetype *new_wall;
  int i, xt, yt, floor_removed;
  char message[MAX_BUF];

  sprintf (message, "You change the floor to better suit your tastes.");

  /*
   * Now the building part... 
   * First, remove wall(s) and floor(s) at position x, y
   */
  above_floor = NULL;
  new_wall = NULL;
  floor_removed = 0;
  tmp = GET_MAP_OB (pl->map, x, y);
  if (tmp)
    {
      while (tmp)
        {
          above = tmp->above;
          if (BUILDABLE_WALL == tmp->type)
            {
              /* There was a wall, remove it & keep its archetype to make new walls */
              new_wall = tmp->arch;
              tmp->destroy ();
              sprintf (message, "You destroy the wall and redo the floor.");
            }
          else if ((FLOOR == tmp->type) || (QUERY_FLAG (tmp, FLAG_IS_FLOOR)))
            {
              tmp->destroy ();
              floor_removed = 1;
            }
          else
            {
              if (floor_removed)
                above_floor = tmp;
            }

          tmp = above;
        }
    }

  /* Now insert our floor */
  new_floor = archetype::find (material->slaying);
  if (!new_floor)
    {
      /* Not found, log & bail out */
      LOG (llevError, "apply_builder_floor: unable to find archetype %s.\n", &material->slaying);
      return;
    }

  tmp = arch_to_object (new_floor);
  SET_FLAG (tmp, FLAG_IS_BUILDABLE);
  SET_FLAG (tmp, FLAG_UNIQUE);
  SET_FLAG (tmp, FLAG_IS_FLOOR);
  tmp->type = FLOOR;
  insert_ob_in_map_at (tmp, pl->map, above_floor, above_floor ? INS_BELOW_ORIGINATOR : INS_ON_TOP, x, y);

  /*
   * Next step: make sure there are either walls or floors around the new square
   * Since building, you can have: blocking view / floor / wall / nothing
   */
  for (i = 1; i <= 8; i++)
    {
      xt = x + freearr_x[i];
      yt = y + freearr_y[i];
      tmp = GET_MAP_OB (pl->map, xt, yt);
      if (!tmp)
        {
          /* Must insert floor & wall */
          tmp = arch_to_object (new_floor);
          /* Better make the floor unique */
          SET_FLAG (tmp, FLAG_UNIQUE);
          SET_FLAG (tmp, FLAG_IS_BUILDABLE);
          tmp->type = FLOOR;
          insert_ob_in_map_at (tmp, pl->map, 0, 0, xt, yt);
          /* Insert wall if exists. Note: if it doesn't, the map is weird... */
          if (new_wall)
            {
              tmp = arch_to_object (new_wall);
              SET_FLAG (tmp, FLAG_IS_BUILDABLE);
              tmp->type = BUILDABLE_WALL;
              insert_ob_in_map_at (tmp, pl->map, 0, 0, xt, yt);
            }
        }
    }

  /* Finally fixing walls to ensure nice continuous walls
   * Note: 2 squares around are checked, because potentially we added walls around the building
   * spot, so need to check that those new walls connect correctly
   */
  for (xt = x - 2; xt <= x + 2; xt++)
    for (yt = y - 2; yt <= y + 2; yt++)
      {
        if (!OUT_OF_REAL_MAP (pl->map, xt, yt))
          fix_walls (pl->map, xt, yt);
      }

  /* Now remove raw item from inventory */
  decrease_ob (material);

  /* And tell player about the fix */
  new_draw_info (NDI_UNIQUE, 0, pl, message);
}

/**
 * Wall radius fix function
 */
void fix_walls_around (maptile *map, int x, int y)
{
  for (int xt = x - 1; xt <= x + 1; xt++)
    for (int yt = y - 1; yt <= y + 1; yt++)
      {
        if (OUT_OF_REAL_MAP (map, xt, yt))
          continue;

        fix_walls (map, xt, yt);
      }
}

/**
 * Wall building function
 *
 * Walls can be build:
 *  - on a floor without anything else
 *  - on an existing wall, with or without a floor
 */
void
apply_builder_wall (object *pl, object *material, short x, short y)
{
  object *current_wall;
  object *tmp;
  int xt, yt;
  struct archetype *new_wall;
  char message[MAX_BUF];

  remove_marking_runes (pl->map, x, y);

  /* Grab existing wall, if any */
  current_wall = NULL;
  tmp = GET_MAP_OB (pl->map, x, y);
  while (tmp && !current_wall)
    {
      if (BUILDABLE_WALL == tmp->type)
        current_wall = tmp;

      tmp = tmp->above;
    }

  /* Find the raw wall in inventory */
  sprintf (message, "You build a wall.");

  /* Now we can actually insert the wall */
  new_wall = archetype::find (material->slaying);
  if (!new_wall)
    {
      LOG (llevError, "apply_builder_wall: unable to find archetype %s\n", &material->slaying);
      return;
    }

  tmp = arch_to_object (new_wall);
  tmp->type = BUILDABLE_WALL;
  SET_FLAG (tmp, FLAG_IS_BUILDABLE);
  insert_ob_in_map_at (tmp, pl->map, 0, INS_ABOVE_FLOOR_ONLY, x, y);

  /* If existing wall, remove it, no need to fix other walls */
  if (current_wall)
    {
      current_wall->destroy ();
      fix_walls (pl->map, x, y);
      sprintf (message, "You redecorate the wall to better suit your tastes.");
    }
  else
    {
      /* Else fix all walls around */
      for (xt = x - 1; xt <= x + 1; xt++)
        for (yt = y - 1; yt <= y + 1; yt++)
          {
            if (OUT_OF_REAL_MAP (pl->map, xt, yt))
              continue;

            fix_walls (pl->map, xt, yt);
          }
    }

  /* Now remove item from inventory */
  decrease_ob (material);

  /* And tell player what happened */
  new_draw_info (NDI_UNIQUE, 0, pl, message);
}

/**
 * Generic item builder.
 *
 * Item must be put on a square with a floor, you can have something under.
 * Archetype of created object is item->slaying (raw material).
 * Type of inserted item is tested for specific cases (doors & such).
 * Item is inserted above the floor, unless Str == 1 (only for detectors i guess)
 */
void
apply_builder_item (object *pl, object *item, short x, short y)
{
  object *tmp;
  struct archetype *arch;
  int insert_flag;
  object *floor;
  object *con_rune;
  int connected;

  /* Find floor */
  floor = GET_MAP_OB (pl->map, x, y);
  if (!floor)
    {
      new_draw_info (NDI_UNIQUE, 0, pl, "Invalid square.");
      return;
    }

  while (floor && (floor->type != FLOOR) && (!QUERY_FLAG (floor, FLAG_IS_FLOOR)))
    floor = floor->above;

  if (!floor)
    {
      new_draw_info (NDI_UNIQUE, 0, pl, "This square has no floor, you can't build here.");
      return;
    }
  /* Create item, set flag, insert in map */
  arch = archetype::find (item->slaying);
  if (!arch)
    return;

  tmp = arch_to_object (arch);

  if ((floor->above) && (!can_build_over (pl->map, tmp, x, y)))
    /* Floor has something on top that interferes with building */
    {
      new_draw_info (NDI_UNIQUE, 0, pl, "You can't build here.");
      return;
    }

  SET_FLAG (tmp, FLAG_IS_BUILDABLE);
  SET_FLAG (tmp, FLAG_NO_PICK);

  /*
   * This doesn't work on non unique maps. pedestals under floor will not be saved...
   insert_flag = ( item->stats.Str == 1 ) ? INS_BELOW_ORIGINATOR : INS_ABOVE_FLOOR_ONLY;
   */
  insert_flag = INS_ABOVE_FLOOR_ONLY;

  connected = 0;
  switch (tmp->type)
    {
        case DOOR:
        case GATE:
        case BUTTON:
        case DETECTOR:
        case TIMED_GATE:
        case PEDESTAL:
        case CF_HANDLE:
        case MAGIC_EAR:
        case SIGN:
          /* Signs don't need a connection, but but magic mouths do. */
          if (tmp->type == SIGN && strcmp (tmp->arch->name, "magic_mouth"))
            break;
          con_rune = get_connection_rune (pl, x, y);
          connected = find_or_create_connection_for_map (pl, x, y, con_rune);
          if (connected == -1)
            {
              /* Player already informed of failure by the previous function */
              tmp->destroy ();
              return;
            }
          /* Remove marking rune */
          con_rune->destroy ();
    }

  /* For magic mouths/ears, and signs, take the msg from a book of scroll */
  if ((tmp->type == SIGN) || (tmp->type == MAGIC_EAR))
    {
      if (adjust_sign_msg (pl, x, y, tmp) == -1)
        {
          tmp->destroy ();
          return;
        }
    }

  insert_ob_in_map_at (tmp, pl->map, floor, insert_flag, x, y);
  if (connected != 0)
    add_button_link (tmp, pl->map, connected);

  new_draw_info_format (NDI_UNIQUE, 0, pl, "You build the %s", query_name (tmp));
  decrease_ob_nr (item, 1);
}

/**
 * Item remover.
 *
 * Removes first buildable item, either under or above the floor
 */
void
apply_builder_remove (object *pl, int dir)
{
  object *item;
  short x, y;

  x = pl->x + freearr_x[dir];
  y = pl->y + freearr_y[dir];

  /* Check square */
  item = GET_MAP_OB (pl->map, x, y);
  if (!item)
    {
      /* Should not happen with previous tests, but we never know */
      new_draw_info (NDI_UNIQUE, 0, pl, "Invalid square.");
      LOG (llevError, "apply_builder_remove: (null) square at (%d, %d, %s)\n", x, y, pl->map->path);
      return;
    }

  if (item->type == FLOOR || QUERY_FLAG (item, FLAG_IS_FLOOR))
    item = item->above;

  if (!item)
    {
      new_draw_info (NDI_UNIQUE, 0, pl, "Nothing to remove.");
      return;
    }

  /* Now remove object, with special cases (buttons & such) */
  switch (item->type)
    {
        case BUILDABLE_WALL:
          new_draw_info (NDI_UNIQUE, 0, pl, "Can't remove a wall with that, build a floor.");
          return;

        case DOOR:
        case BUTTON:
        case GATE:
        case TIMED_GATE:
        case DETECTOR:
        case PEDESTAL:
        case CF_HANDLE:
        case MAGIC_EAR:
        case SIGN:
          /* Special case: must unconnect */
          if (QUERY_FLAG (item, FLAG_IS_LINKED))
            remove_button_link (item);

          /* Fall through */

        default:
          /* Remove generic item */
          if (!QUERY_FLAG (item, FLAG_IS_BUILDABLE))
            {
              new_draw_info_format (NDI_UNIQUE, 0, pl, "You can't remove the %s, it's not buildable!", query_name (item));
              return;
            }

          new_draw_info_format (NDI_UNIQUE, 0, pl, "You remove the %s", query_name (item));
          item->destroy ();
    }
}

/**
 * Global building function
 *
 * This is the general map building function. Called when the player 'fires' a builder
 * or remover object.
 */
void
apply_map_builder (object *pl, int dir)
{
  object *builder;
  object *tmp;
  object *tmp2;
  short x, y;

  if (!pl->type == PLAYER)
    return;

  /*if ( !player->map->unique )
     {
     new_draw_info( NDI_UNIQUE, 0, player, "You can't build outside a unique map." );
     return;
     } */

  if (dir == 0)
    {
      new_draw_info (NDI_UNIQUE, 0, pl, "You can't build or destroy under yourself.");
      return;
    }

  x = pl->x + freearr_x[dir];
  y = pl->y + freearr_y[dir];

  if ((1 > x) || (1 > y) || ((MAP_WIDTH (pl->map) - 2) < x) || ((MAP_HEIGHT (pl->map) - 2) < y))
    {
      new_draw_info (NDI_UNIQUE, 0, pl, "Can't build on map edge...");
      return;
    }

  /*
   * Check specified square
   * The square must have only buildable items
   * Exception: marking runes are all right,
   * since they are used for special things like connecting doors / buttons
   */

  tmp = GET_MAP_OB (pl->map, x, y);
  if (!tmp)
    {
      /* Nothing, meaning player is standing next to an undefined square... */
      LOG (llevError, "apply_map_builder: undefined square at (%d, %d, %s)\n", x, y, pl->map->path);
      new_draw_info (NDI_UNIQUE, 0, pl, "You'd better not build here, it looks weird.");
      return;
    }
  tmp2 = find_marked_object (pl);
  while (tmp)
    {
      if (!QUERY_FLAG (tmp, FLAG_IS_BUILDABLE) && ((tmp->type != SIGN) || (strcmp (tmp->arch->name, "rune_mark"))))
        {
          /* The item building function already has it's own special
           * checks for this
           */
          if ((!tmp2) || (tmp2->subtype != ST_MAT_ITEM))
            {
              new_draw_info (NDI_UNIQUE, 0, pl, "You can't build here.");
              return;
            }
        }
      tmp = tmp->above;
    }

  /* Now we know the square is ok */
  builder = pl->contr->ranges[range_builder];

  if (builder->subtype == ST_BD_REMOVE)
    /* Remover -> call specific function and bail out */
    {
      apply_builder_remove (pl, dir);
      return;
    }

  if (builder->subtype == ST_BD_BUILD)
    /*
     * Builder.
     * Find marked item to build, call specific function
     */
    {
      tmp = tmp2;
      if (!tmp)
        {
          new_draw_info (NDI_UNIQUE, 0, pl, "You need to mark raw materials to use.");
          return;
        }

      if (tmp->type != MATERIAL)
        {
          new_draw_info (NDI_UNIQUE, 0, pl, "You can't use the marked item to build.");
          return;
        }

      switch (tmp->subtype)
        {
            case ST_MAT_FLOOR:
              apply_builder_floor (pl, tmp, x, y);
              return;

            case ST_MAT_WALL:
              apply_builder_wall (pl, tmp, x, y);
              return;

            case ST_MAT_ITEM:
              apply_builder_item (pl, tmp, x, y);
              return;

            default:
              new_draw_info (NDI_UNIQUE, 0, pl, "Don't know how to apply this material, sorry.");
              LOG (llevError, "apply_map_builder: invalid material subtype %d\n", tmp->subtype);
              return;
        }
    }

  /* Here, it means the builder has an invalid type */
  new_draw_info (NDI_UNIQUE, 0, pl, "Don't know how to apply this tool, sorry.");
  LOG (llevError, "apply_map_builder: invalid builder subtype %d\n", builder->subtype);
}

/**
 * Make the built object inherit the msg of books that are used with it.
 * For objects already invisible (i.e. magic mouths & ears), also make it
 * it inherit the face and the name with "talking " prepended.
 */
int
adjust_sign_msg (object *pl, short x, short y, object *tmp)
{
  object *book;
  char buf[MAX_BUF];
  char buf2[MAX_BUF];

  book = get_msg_book (pl, x, y);
  if (!book)
    {
      new_draw_info (NDI_UNIQUE, 0, pl, "You need to put a book or scroll with the message.");
      return -1;
    }

  tmp->msg = book->msg;

  if (tmp->invisible)
    {
      if (book->custom_name != NULL)
        {
          snprintf (buf, sizeof (buf), "talking %s", &book->custom_name);
        }
      else
        {
          snprintf (buf, sizeof (buf), "talking %s", &book->name);
        }
      tmp->name = buf;

      if (book->name_pl != NULL)
        {
          snprintf (buf2, sizeof (buf2), "talking %s", &book->name_pl);
          tmp->name_pl = buf2;
        }

      tmp->face = book->face;
      tmp->invisible = 0;
    }

  book->destroy ();
  return 0;
}
Revision:	1.13
Committed:	Wed Dec 20 12:13:47 2006 UTC (17 years, 5 months ago) by elmex
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+14 -8 lines
Log Message:	removed TRAP_PART, renamed WALL to BUILDABLE_WALL to reflect the usage of this type these days and fixed generic destroyer not to remove players and other objects that can crash the server (hopefully).