server/common/treasure.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>
 */

#define ALLOWED_COMBINATION

/* TREASURE_DEBUG does some checking on the treasurelists after loading.
 * It is useful for finding bugs in the treasures file.  Since it only
 * slows the startup some (and not actual game play), it is by default
 * left on
 */
#define TREASURE_DEBUG

/* TREASURE_VERBOSE enables copious output concerning artifact generation */

/* #define TREASURE_VERBOSE */

#include <global.h>
#include <treasure.h>
#include <funcpoint.h>
#include <loader.h>


static void change_treasure (treasure *t, object *op);  /* overrule default values */
extern char *spell_mapping[];

/*
 * Initialize global archtype pointers:
 */

void
init_archetype_pointers ()
{
  int prev_warn = warn_archetypes;

  warn_archetypes = 1;
  if (ring_arch == NULL)
    ring_arch = archetype::find ("ring");
  if (amulet_arch == NULL)
    amulet_arch = archetype::find ("amulet");
  if (staff_arch == NULL)
    staff_arch = archetype::find ("staff");
  if (crown_arch == NULL)
    crown_arch = archetype::find ("crown");
  warn_archetypes = prev_warn;
}

/*
 * Allocate and return the pointer to an empty treasurelist structure.
 */

static treasurelist *
get_empty_treasurelist (void)
{
  return new treasurelist;
}

/*
 * Allocate and return the pointer to an empty treasure structure.
 */
//TODO: make this a constructor
static treasure *
get_empty_treasure (void)
{
  treasure *t = new treasure;

  t->chance = 100;

  return t;
}

/*
 * Reads the lib/treasure file from disk, and parses the contents
 * into an internal treasure structure (very linked lists)
 */

static treasure *
load_treasure (FILE * fp, int *line)
{
  char buf[MAX_BUF], *cp, variable[MAX_BUF];
  treasure *t = get_empty_treasure ();
  int value;

  nroftreasures++;
  while (fgets (buf, MAX_BUF, fp) != NULL)
    {
      (*line)++;

      if (*buf == '#')
        continue;
      if ((cp = strchr (buf, '\n')) != NULL)
        *cp = '\0';
      cp = buf;
      while (isspace (*cp))     /* Skip blanks */
        cp++;

      if (sscanf (cp, "arch %s", variable))
        {
          if ((t->item = archetype::find (variable)) == NULL)
            LOG (llevError, "Treasure lacks archetype: %s\n", variable);
        }
      else if (sscanf (cp, "list %s", variable))
        t->name = variable;
      else if (sscanf (cp, "change_name %s", variable))
        t->change_arch.name = variable;
      else if (sscanf (cp, "change_title %s", variable))
        t->change_arch.title = variable;
      else if (sscanf (cp, "change_slaying %s", variable))
        t->change_arch.slaying = variable;
      else if (sscanf (cp, "chance %d", &value))
        t->chance = (uint8) value;
      else if (sscanf (cp, "nrof %d", &value))
        t->nrof = (uint16) value;
      else if (sscanf (cp, "magic %d", &value))
        t->magic = (uint8) value;
      else if (!strcmp (cp, "yes"))
        t->next_yes = load_treasure (fp, line);
      else if (!strcmp (cp, "no"))
        t->next_no = load_treasure (fp, line);
      else if (!strcmp (cp, "end"))
        return t;
      else if (!strcmp (cp, "more"))
        {
          t->next = load_treasure (fp, line);
          return t;
        }
      else
        LOG (llevError, "Unknown treasure-command: '%s', last entry %s, line %d\n", cp, &t->name, *line);
    }
  LOG (llevError, "treasure lacks 'end'.\n");
  return t;
}

#ifdef TREASURE_DEBUG

/* recursived checks the linked list.  Treasurelist is passed only
 * so that the treasure name can be printed out
 */
static void
check_treasurelist (const treasure *t, const treasurelist * tl)
{
  if (t->chance >= 100 && t->next_yes && (t->next || t->next_no))
    LOG (llevError, "Treasurelist %s has element that has 100%% generation, next_yes field as well as next or next_no\n", &tl->name);
  /* find_treasurelist will print out its own error message */
  if (t->name && *t->name)
    find_treasurelist (t->name);
  if (t->next)
    check_treasurelist (t->next, tl);
  if (t->next_yes)
    check_treasurelist (t->next_yes, tl);
  if (t->next_no)
    check_treasurelist (t->next_no, tl);
}
#endif

/*
 * Opens LIBDIR/treasure and reads all treasure-declarations from it.
 * Each treasure is parsed with the help of load_treasure().
 */

void
load_treasures (void)
{
  FILE *fp;
  char filename[MAX_BUF], buf[MAX_BUF], name[MAX_BUF];
  treasurelist *previous = NULL;
  treasure *t;
  int comp, line = 0;

  sprintf (filename, "%s/%s", settings.datadir, settings.treasures);
  if ((fp = open_and_uncompress (filename, 0, &comp)) == NULL)
    {
      LOG (llevError, "Can't open treasure file.\n");
      return;
    }
  while (fgets (buf, MAX_BUF, fp) != NULL)
    {
      line++;
      if (*buf == '#')
        continue;

      if (sscanf (buf, "treasureone %s\n", name) || sscanf (buf, "treasure %s\n", name))
        {
          treasurelist *tl = get_empty_treasurelist ();

          tl->name = name;
          if (previous == NULL)
            first_treasurelist = tl;
          else
            previous->next = tl;
          previous = tl;
          tl->items = load_treasure (fp, &line);

          /* This is a one of the many items on the list should be generated.
           * Add up the chance total, and check to make sure the yes & no
           * fields of the treasures are not being used.
           */
          if (!strncmp (buf, "treasureone", 11))
            {
              for (t = tl->items; t != NULL; t = t->next)
                {
#ifdef TREASURE_DEBUG
                  if (t->next_yes || t->next_no)
                    {
                      LOG (llevError, "Treasure %s is one item, but on treasure %s\n", &tl->name, t->item ? &t->item->name : &t->name);
                      LOG (llevError, "  the next_yes or next_no field is set\n");
                    }
#endif
                  tl->total_chance += t->chance;
                }
            }
        }
      else
        LOG (llevError, "Treasure-list %s didn't understand: %s, line %d\n", filename, buf, line);
    }
  close_and_delete (fp, comp);

#ifdef TREASURE_DEBUG
  /* Perform some checks on how valid the treasure data actually is.
   * verify that list transitions work (ie, the list that it is supposed
   * to transition to exists).  Also, verify that at least the name
   * or archetype is set for each treasure element.
   */
  for (previous = first_treasurelist; previous != NULL; previous = previous->next)
    check_treasurelist (previous->items, previous);
#endif
}

/*
 * Searches for the given treasurelist in the globally linked list
 * of treasurelists which has been built by load_treasures().
 */

treasurelist *
find_treasurelist (const char *name)
{
  shstr_cmp name_ (name);

  if (!name_)
    return 0;

  for (treasurelist *tl = first_treasurelist; tl != 0; tl = tl->next)
    if (name_ == tl->name)
      return tl;

  if (first_treasurelist)
    LOG (llevError, "Couldn't find treasurelist %s\n", name);

  return 0;
}


/*
 * Generates the objects specified by the given treasure.
 * It goes recursively through the rest of the linked list.
 * If there is a certain percental chance for a treasure to be generated,
 * this is taken into consideration.
 * The second argument specifies for which object the treasure is
 * being generated.
 * If flag is GT_INVISIBLE, only invisible objects are generated (ie, only
 * abilities.  This is used by summon spells, thus no summoned monsters
 * start with equipment, but only their abilities).
 */
static void
put_treasure (object *op, object *creator, int flags)
{
  object *tmp;

  /* Bit of a hack - spells should never be put onto the map.  The entire
   * treasure stuff is a problem - there is no clear idea of knowing
   * this is the original object, or if this is an object that should be created
   * by another object.
   */
  if (flags & GT_ENVIRONMENT && op->type != SPELL)
    {
      SET_FLAG (op, FLAG_OBJ_ORIGINAL);
      op->insert_at (creator, creator, INS_NO_MERGE | INS_NO_WALK_ON);
    }
  else
    {
      op = creator->insert (op);

      if ((flags & GT_APPLY) && QUERY_FLAG (creator, FLAG_MONSTER))
        monster_check_apply (creator, op);

      if ((flags & GT_UPDATE_INV) && (tmp = creator->in_player ()))
        esrv_send_item (tmp, op);
    }
}

/* if there are change_xxx commands in the treasure, we include the changes
 * in the generated object
 */
static void
change_treasure (treasure *t, object *op)
{
  /* CMD: change_name xxxx */
  if (t->change_arch.name)
    {
      op->name = t->change_arch.name;
      op->name_pl = t->change_arch.name;
    }

  if (t->change_arch.title)
    op->title = t->change_arch.title;

  if (t->change_arch.slaying)
    op->slaying = t->change_arch.slaying;
}

void
create_all_treasures (treasure *t, object *op, int flag, int difficulty, int tries)
{
  object *tmp;

  if ((int) t->chance >= 100 || (rndm (100) + 1) < (int) t->chance)
    {
      if (t->name)
        {
          if (difficulty >= t->magic)
            {
              treasurelist *tl = find_treasurelist (t->name);
              if (tl)
                create_treasure (tl, op, flag, difficulty, tries);
            }
        }
      else
        {
          if (t->item && (t->item->clone.invisible != 0 || !(flag & GT_INVISIBLE)))
            {
              tmp = arch_to_object (t->item);
              if (t->nrof && tmp->nrof <= 1)
                tmp->nrof = rndm (t->nrof) + 1;

              fix_generated_item (tmp, op, difficulty, t->magic, flag);
              change_treasure (t, tmp);
              put_treasure (tmp, op, flag);
            }
        }

      if (t->next_yes != NULL)
        create_all_treasures (t->next_yes, op, flag, difficulty, tries);
    }
  else if (t->next_no != NULL)
    create_all_treasures (t->next_no, op, flag, difficulty, tries);

  if (t->next != NULL)
    create_all_treasures (t->next, op, flag, difficulty, tries);
}

void
create_one_treasure (treasurelist *tl, object *op, int flag, int difficulty, int tries)
{
  int value = rndm (tl->total_chance);
  treasure *t;

  if (tries++ > 100)
    {
      LOG (llevDebug, "create_one_treasure: tries exceeded 100, returning without making treasure\n");
      return;
    }

  for (t = tl->items; t != NULL; t = t->next)
    {
      value -= t->chance;

      if (value < 0)
        break;
    }

  if (!t || value >= 0)
    {
      LOG (llevError, "create_one_treasure: got null object or not able to find treasure\n");
      abort ();
      return;
    }

  if (t->name)
    {
      if (difficulty >= t->magic)
        {
          treasurelist *tl = find_treasurelist (t->name);
          if (tl)
            create_treasure (tl, op, flag, difficulty, tries);
        }
      else if (t->nrof)
        create_one_treasure (tl, op, flag, difficulty, tries);

      return;
    }

  if (t->item && (t->item->clone.invisible != 0 || flag != GT_INVISIBLE))
    {
      object *tmp = arch_to_object (t->item);

      if (!tmp)
        return;

      if (t->nrof && tmp->nrof <= 1)
        tmp->nrof = rndm (t->nrof) + 1;

      fix_generated_item (tmp, op, difficulty, t->magic, flag);
      change_treasure (t, tmp);
      put_treasure (tmp, op, flag);
    }
}

/* This calls the appropriate treasure creation function.  tries is passed
 * to determine how many list transitions or attempts to create treasure
 * have been made.  It is really in place to prevent infinite loops with
 * list transitions, or so that excessively good treasure will not be
 * created on weak maps, because it will exceed the number of allowed tries
 * to do that.
 */
void
create_treasure (treasurelist *tl, object *op, int flag, int difficulty, int tries)
{
  if (tries++ > 100)
    {
      LOG (llevDebug, "createtreasure: tries exceeded 100, returning without making treasure\n");
      return;
    }

  if (tl->total_chance)
    create_one_treasure (tl, op, flag, difficulty, tries);
  else
    create_all_treasures (tl->items, op, flag, difficulty, tries);
}

/* This is similar to the old generate treasure function.  However,
 * it instead takes a treasurelist.  It is really just a wrapper around
 * create_treasure.  We create a dummy object that the treasure gets
 * inserted into, and then return that treausre
 */
object *
generate_treasure (treasurelist *tl, int difficulty)
{
  difficulty = clamp (difficulty, 1, settings.max_level);

  object *ob = object::create (), *tmp;

  create_treasure (tl, ob, 0, difficulty, 0);

  /* Don't want to free the object we are about to return */
  tmp = ob->inv;
  if (tmp != NULL)
    tmp->remove ();

  if (ob->inv)
    LOG (llevError, "In generate treasure, created multiple objects.\n");

  ob->destroy ();
  return tmp;
}

/*
 * This is a new way of calculating the chance for an item to have
 * a specific magical bonus.
 * The array has two arguments, the difficulty of the level, and the
 * magical bonus "wanted".
 */

static int difftomagic_list[DIFFLEVELS][MAXMAGIC + 1] = {

/*chance of magic    difficulty*/

/* +0  +1 +2 +3 +4 */
  {95, 2, 2, 1, 0},             /*1 */
  {92, 5, 2, 1, 0},             /*2 */
  {85, 10, 4, 1, 0},            /*3 */
  {80, 14, 4, 2, 0},            /*4 */
  {75, 17, 5, 2, 1},            /*5 */
  {70, 18, 8, 3, 1},            /*6 */
  {65, 21, 10, 3, 1},           /*7 */
  {60, 22, 12, 4, 2},           /*8 */
  {55, 25, 14, 4, 2},           /*9 */
  {50, 27, 16, 5, 2},           /*10 */
  {45, 28, 18, 6, 3},           /*11 */
  {42, 28, 20, 7, 3},           /*12 */
  {40, 27, 21, 8, 4},           /*13 */
  {38, 25, 22, 10, 5},          /*14 */
  {36, 23, 23, 12, 6},          /*15 */
  {33, 21, 24, 14, 8},          /*16 */
  {31, 19, 25, 16, 9},          /*17 */
  {27, 15, 30, 18, 10},         /*18 */
  {20, 12, 30, 25, 13},         /*19 */
  {15, 10, 28, 30, 17},         /*20 */
  {13, 9, 27, 28, 23},          /*21 */
  {10, 8, 25, 28, 29},          /*22 */
  {8, 7, 23, 26, 36},           /*23 */
  {6, 6, 20, 22, 46},           /*24 */
  {4, 5, 17, 18, 56},           /*25 */
  {2, 4, 12, 14, 68},           /*26 */
  {0, 3, 7, 10, 80},            /*27 */
  {0, 0, 3, 7, 90},             /*28 */
  {0, 0, 0, 3, 97},             /*29 */
  {0, 0, 0, 0, 100},            /*30 */
  {0, 0, 0, 0, 100},            /*31 */
};


/* calculate the appropriate level for wands staves and scrolls.  
 * This code presumes that op has had its spell object created (in op->inv)
 *
 * elmex Wed Aug  9 17:44:59 CEST 2006:
 *        Removed multiplicator, too many high-level items were generated on low-difficulty maps.
 */

int
level_for_item (const object *op, int difficulty)
{
  int olevel = 0;

  if (!op->inv)
    {
      LOG (llevError, "level_for_item: Object %s has no inventory!\n", &op->name);
      return 0;
    }

  olevel = (int) (op->inv->level + (double) difficulty * (1 - drand48 () * drand48 () * 2));

  if (olevel <= 0)
    olevel = rndm (1, MIN (op->inv->level, 1));

  if (olevel > MAXLEVEL)
    olevel = MAXLEVEL;

  return olevel;
}

/*
 * Based upon the specified difficulty and upon the difftomagic_list array,
 * a random magical bonus is returned.  This is used when determine
 * the magical bonus created on specific maps.
 *
 * elmex Thu Aug 10 18:45:44 CEST 2006:
 *       Scaling difficulty by max_level, as difficulty is a level and not some
 *       weird integer between 1-31.
 *
 */

int
magic_from_difficulty (int difficulty)
{
  int percent = 0, magic = 0;
  int scaled_diff = (int) (((double) difficulty / settings.max_level) * DIFFLEVELS);

  scaled_diff--;

  if (scaled_diff < 0)
    scaled_diff = 0;

  if (scaled_diff >= DIFFLEVELS)
    scaled_diff = DIFFLEVELS - 1;

  percent = rndm (100);

  for (magic = 0; magic < (MAXMAGIC + 1); magic++)
    {
      percent -= difftomagic_list[scaled_diff][magic];

      if (percent < 0)
        break;
    }

  if (magic == (MAXMAGIC + 1))
    {
      LOG (llevError, "Warning, table for difficulty (scaled %d) %d bad.\n", scaled_diff, difficulty);
      magic = 0;
    }

  magic = (rndm (3)) ? magic : -magic;
  /* LOG(llevDebug, "Chose magic %d for difficulty (scaled %d) %d\n", magic, scaled_diff, difficulty); */

  return magic;
}

/*
 * Sets magical bonus in an object, and recalculates the effect on
 * the armour variable, and the effect on speed of armour.
 * This function doesn't work properly, should add use of archetypes
 * to make it truly absolute.
 */

void
set_abs_magic (object *op, int magic)
{
  if (!magic)
    return;

  op->magic = magic;
  if (op->arch)
    {
      if (op->type == ARMOUR)
        ARMOUR_SPEED (op) = (ARMOUR_SPEED (&op->arch->clone) * (100 + magic * 10)) / 100;

      if (magic < 0 && !(rndm (3)))        /* You can't just check the weight always */
        magic = (-magic);
      op->weight = (op->arch->clone.weight * (100 - magic * 10)) / 100;
    }
  else
    {
      if (op->type == ARMOUR)
        ARMOUR_SPEED (op) = (ARMOUR_SPEED (op) * (100 + magic * 10)) / 100;
      if (magic < 0 && !(rndm (3)))        /* You can't just check the weight always */
        magic = (-magic);
      op->weight = (op->weight * (100 - magic * 10)) / 100;
    }
}

/*
 * Sets a random magical bonus in the given object based upon
 * the given difficulty, and the given max possible bonus.
 */

static void
set_magic (int difficulty, object *op, int max_magic, int flags)
{
  int i;

  i = magic_from_difficulty (difficulty);
  if ((flags & GT_ONLY_GOOD) && i < 0)
    i = -i;
  if (i > max_magic)
    i = max_magic;
  set_abs_magic (op, i);
  if (i < 0)
    SET_FLAG (op, FLAG_CURSED);
}

/*
 * Randomly adds one magical ability to the given object.
 * Modified for Partial Resistance in many ways:
 * 1) Since rings can have multiple bonuses, if the same bonus
 *  is rolled again, increase it - the bonuses now stack with
 *  other bonuses previously rolled and ones the item might natively have.
 * 2) Add code to deal with new PR method.
 */

void
set_ring_bonus (object *op, int bonus)
{

  int r = rndm (bonus > 0 ? 25 : 11);

  if (op->type == AMULET)
    {
      if (!(rndm (21)))
        r = 20 + rndm (2);
      else
        {
          if (rndm (2))
            r = 10;
          else
            r = 11 + rndm (9);
        }
    }

  switch (r)
    {
          /* Redone by MSW 2000-11-26 to have much less code.  Also,
           * bonuses and penalties will stack and add to existing values.
           * of the item.
           */
        case 0:
        case 1:
        case 2:
        case 3:
        case 4:
        case 5:
        case 6:
          set_attr_value (&op->stats, r, (signed char) (bonus + get_attr_value (&op->stats, r)));
          break;

        case 7:
          op->stats.dam += bonus;
          break;

        case 8:
          op->stats.wc += bonus;
          break;

        case 9:
          op->stats.food += bonus;      /* hunger/sustenance */
          break;

        case 10:
          op->stats.ac += bonus;
          break;

          /* Item that gives protections/vulnerabilities */
        case 11:
        case 12:
        case 13:
        case 14:
        case 15:
        case 16:
        case 17:
        case 18:
        case 19:
          {
            int b = 5 + abs (bonus), val, resist = rndm (num_resist_table);

            /* Roughly generate a bonus between 100 and 35 (depending on the bonus) */
            val = 10 + rndm (b) + rndm (b) + rndm (b) + rndm (b);

            /* Cursed items need to have higher negative values to equal out with
             * positive values for how protections work out.  Put another
             * little random element in since that they don't always end up with
             * even values.
             */
            if (bonus < 0)
              val = 2 * -val - rndm (b);
            if (val > 35)
              val = 35;         /* Upper limit */
            b = 0;

            while (op->resist[resist_table[resist]] != 0 && b < 4)
              resist = rndm (num_resist_table);

            if (b == 4)
              return;           /* Not able to find a free resistance */

            op->resist[resist_table[resist]] = val;
            /* We should probably do something more clever here to adjust value
             * based on how good a resistance we gave.
             */
            break;
          }
        case 20:
          if (op->type == AMULET)
            {
              SET_FLAG (op, FLAG_REFL_SPELL);
              op->value *= 11;
            }
          else
            {
              op->stats.hp = 1; /* regenerate hit points */
              op->value *= 4;
            }
          break;

        case 21:
          if (op->type == AMULET)
            {
              SET_FLAG (op, FLAG_REFL_MISSILE);
              op->value *= 9;
            }
          else
            {
              op->stats.sp = 1; /* regenerate spell points */
              op->value *= 3;
            }
          break;

        case 22:
          op->stats.exp += bonus;       /* Speed! */
          op->value = (op->value * 2) / 3;
          break;
    }

  if (bonus > 0)
    op->value *= 2 * bonus;
  else
    op->value = -(op->value * 2 * bonus) / 3;
}

/*
 * get_magic(diff) will return a random number between 0 and 4.
 * diff can be any value above 2.  The higher the diff-variable, the
 * higher is the chance of returning a low number.
 * It is only used in fix_generated_treasure() to set bonuses on
 * rings and amulets.
 * Another scheme is used to calculate the magic of weapons and armours.
 */
int
get_magic (int diff)
{
  int i;

  if (diff < 3)
    diff = 3;

  for (i = 0; i < 4; i++)
    if (rndm (diff))
      return i;

  return 4;
}

#define DICE2   (get_magic(2)==2?2:1)
#define DICESPELL (rndm (3) + rndm (3) + rndm (3) + rndm (3) + rndm (3))

/*
 * fix_generated_item():  This is called after an item is generated, in
 * order to set it up right.  This produced magical bonuses, puts spells
 * into scrolls/books/wands, makes it unidentified, hides the value, etc.
 */

/* 4/28/96 added creator object from which op may now inherit properties based on
 * op->type. Right now, which stuff the creator passes on is object type 
 * dependant. I know this is a spagetti manuever, but is there a cleaner 
 * way to do this? b.t. */

/*
 * ! (flags & GT_ENVIRONMENT):
 *     Automatically calls fix_flesh_item().
 *
 * flags:
 *    GT_STARTEQUIP: Sets FLAG_STARTEQIUP on item if appropriate, or clears the item's
 *      value.
 *    GT_MINIMAL: Does minimal processing on the object - just enough to make it
 *      a working object - don't change magic, value, etc, but set it material
 *      type as appropriate, for objects that need spell objects, set those, etc
 */
void
fix_generated_item (object *op, object *creator, int difficulty, int max_magic, int flags)
{
  int was_magic = op->magic, num_enchantments = 0, save_item_power = 0;

  if (!creator || creator->type == op->type)
    creator = op;               /*safety & to prevent polymorphed objects giving attributes */

  /* If we make an artifact, this information will be destroyed */
  save_item_power = op->item_power;
  op->item_power = 0;

  if (op->randomitems && op->type != SPELL)
    {
      create_treasure (op->randomitems, op, flags, difficulty, 0);
      if (!op->inv)
        LOG (llevDebug, "fix_generated_item: Unable to generate treasure for %s\n", &op->name);

      /* So the treasure doesn't get created again */
      op->randomitems = NULL;
    }

  if (difficulty < 1)
    difficulty = 1;

  if (INVOKE_OBJECT (ADD_BONUS, op,
                     ARG_OBJECT (creator != op ? creator : 0),
                     ARG_INT (difficulty), ARG_INT (max_magic),
                     ARG_INT (flags)))
    return;

  if (!(flags & GT_MINIMAL))
    {
      if (op->arch == crown_arch)
        {
          set_magic (difficulty, op, max_magic, flags);
          num_enchantments = calc_item_power (op, 1);
          generate_artifact (op, difficulty);
        }
      else
        {
          if (!op->magic && max_magic)
            set_magic (difficulty, op, max_magic, flags);

          num_enchantments = calc_item_power (op, 1);

          if ((!was_magic && !rndm (CHANCE_FOR_ARTIFACT))
              || op->type == HORN
              || difficulty >= settings.max_level)       /* high difficulties always generate an artifact,
                                                                                                                                 * used for shop_floors or treasures */
            generate_artifact (op, difficulty);
        }

      /* Object was made an artifact.  Calculate its item_power rating.
       * the item_power in the object is what the artfiact adds.
       */
      if (op->title)
        {
          /* if save_item_power is set, then most likely we started with an
           * artifact and have added new abilities to it - this is rare, but
           * but I have seen things like 'strange rings of fire'.  So just figure
           * out the power from the base power plus what this one adds.  Note
           * that since item_power is not quite linear, this actually ends up
           * being somewhat of a bonus
           */
          if (save_item_power)
            op->item_power = save_item_power + get_power_from_ench (op->item_power);
          else
            op->item_power = get_power_from_ench (op->item_power + num_enchantments);
        }
      else if (save_item_power)
        {
          /* restore the item_power field to the object if we haven't changed it.
           * we don't care about num_enchantments - that will basically just
           * have calculated some value from the base attributes of the archetype.
           */
          op->item_power = save_item_power;
        }
      else
        {
          /* item_power was zero. This is suspicious, as it may be because it
           * was never previously calculated. Let's compute a value and see if
           * it is non-zero. If it indeed is, then assign it as the new
           * item_power value.
           * - gros, 21th of July 2006.
           */
          op->item_power = calc_item_power (op, 0);
          save_item_power = op->item_power;     /* Just in case it would get used
                                                 * again below */
        }
    }

  /* materialtype modifications.  Note we allow this on artifacts. */
  set_materialname (op, difficulty, NULL);

  if (flags & GT_MINIMAL)
    {
      if (op->type == POTION)
        /* Handle healing and magic power potions */
        if (op->stats.sp && !op->randomitems)
          {
            object *tmp;

            tmp = get_archetype (spell_mapping[op->stats.sp]);
            insert_ob_in_ob (tmp, op);
            op->stats.sp = 0;
          }
    }
  else if (!op->title)          /* Only modify object if not special */
    switch (op->type)
      {
          case WEAPON:
          case ARMOUR:
          case SHIELD:
          case HELMET:
          case CLOAK:
            if (QUERY_FLAG (op, FLAG_CURSED) && !(rndm (4)))
              set_ring_bonus (op, -DICE2);
            break;

          case BRACERS:
            if (!rndm (QUERY_FLAG (op, FLAG_CURSED) ? 5 : 20))
              {
                set_ring_bonus (op, QUERY_FLAG (op, FLAG_CURSED) ? -DICE2 : DICE2);
                if (!QUERY_FLAG (op, FLAG_CURSED))
                  op->value *= 3;
              }
            break;

          case POTION:
            {
              int too_many_tries = 0, is_special = 0;

              /* Handle healing and magic power potions */
              if (op->stats.sp && !op->randomitems)
                {
                  object *tmp;

                  tmp = get_archetype (spell_mapping[op->stats.sp]);
                  insert_ob_in_ob (tmp, op);
                  op->stats.sp = 0;
                }

              while (!(is_special = special_potion (op)) && !op->inv)
                {
                  generate_artifact (op, difficulty);
                  if (too_many_tries++ > 10)
                    break;
                }

              /* don't want to change value for healing/magic power potions,
               * since the value set on those is already correct.
               */
              if (op->inv && op->randomitems)
                {
                  /* value multiplier is same as for scrolls */
                  op->value = (op->value * op->inv->value);
                  op->level = op->inv->level / 2 + rndm (difficulty) + rndm (difficulty);
                }
              else
                {
                  op->name = "potion";
                  op->name_pl = "potions";
                }

              if (!(flags & GT_ONLY_GOOD) && rndm (2))
                SET_FLAG (op, FLAG_CURSED);
              break;
            }

          case AMULET:
            if (op->arch == amulet_arch)
              op->value *= 5;   /* Since it's not just decoration */

          case RING:
            if (op->arch == NULL)
              {
                op->destroy ();
                op = 0;
                break;
              }

            if (op->arch != ring_arch && op->arch != amulet_arch)       /* It's a special artifact! */
              break;

            if (!(flags & GT_ONLY_GOOD) && !(rndm (3)))
              SET_FLAG (op, FLAG_CURSED);

            set_ring_bonus (op, QUERY_FLAG (op, FLAG_CURSED) ? -DICE2 : DICE2);

            if (op->type != RING)       /* Amulets have only one ability */
              break;

            if (!(rndm (4)))
              {
                int d = (rndm (2) || QUERY_FLAG (op, FLAG_CURSED)) ? -DICE2 : DICE2;

                if (d > 0)
                  op->value *= 3;

                set_ring_bonus (op, d);

                if (!(rndm (4)))
                  {
                    int d = (rndm (3) || QUERY_FLAG (op, FLAG_CURSED)) ? -DICE2 : DICE2;

                    if (d > 0)
                      op->value *= 5;
                    set_ring_bonus (op, d);
                  }
              }

            if (GET_ANIM_ID (op))
              SET_ANIMATION (op, rndm (NUM_ANIMATIONS (op)));

            break;

          case BOOK:
            /* Is it an empty book?, if yes lets make a special·
             * msg for it, and tailor its properties based on the·
             * creator and/or map level we found it on.
             */
            if (!op->msg && rndm (10))
              {
                /* set the book level properly */
                if (creator->level == 0 || QUERY_FLAG (creator, FLAG_ALIVE))
                  {
                    if (op->map && op->map->difficulty)
                      op->level = rndm (op->map->difficulty) + rndm (10) + 1;
                    else
                      op->level = rndm (20) + 1;
                  }
                else
                  op->level = rndm (creator->level);

                tailor_readable_ob (op, (creator && creator->stats.sp) ? creator->stats.sp : -1);
                /* books w/ info are worth more! */
                op->value *= ((op->level > 10 ? op->level : (op->level + 1) / 2) * ((strlen (op->msg) / 250) + 1));
                /* creator related stuff */

                /* for library, chained books.  Note that some monsters have no_pick
                 * set - we don't want to set no pick in that case.
                 */
                if (QUERY_FLAG (creator, FLAG_NO_PICK) && !QUERY_FLAG (creator, FLAG_MONSTER))
                  SET_FLAG (op, FLAG_NO_PICK);
                if (creator->slaying && !op->slaying)   /* for check_inv floors */
                  op->slaying = creator->slaying;

                /* add exp so reading it gives xp (once) */
                op->stats.exp = op->value > 10000 ? op->value / 5 : op->value / 10;
              }
            break;

          case SPELLBOOK:
            op->value = op->value * op->inv->value;
            /* add exp so learning gives xp */
            op->level = op->inv->level;
            op->stats.exp = op->value;
            break;

          case WAND:
            /* nrof in the treasure list is number of charges,
             * not number of wands.  So copy that into food (charges),
             * and reset nrof.
             */
            op->stats.food = op->inv->nrof;
            op->nrof = 1;
            /* If the spell changes by level, choose a random level
             * for it, and adjust price.  If the spell doesn't
             * change by level, just set the wand to the level of
             * the spell, and value calculation is simpler.
             */
            if (op->inv->duration_modifier || op->inv->dam_modifier || op->inv->range_modifier)
              {
                op->level = level_for_item (op, difficulty);
                op->value = op->value * op->inv->value * (op->level + 50) / (op->inv->level + 50);
              }
            else
              {
                op->level = op->inv->level;
                op->value = op->value * op->inv->value;
              }
            break;

          case ROD:
            op->level = level_for_item (op, difficulty);
            /* Add 50 to both level an divisor to keep prices a little more
             * reasonable.  Otherwise, a high level version of a low level
             * spell can be worth tons a money (eg, level 20 rod, level 2 spell =
             * 10 time multiplier).  This way, the value are a bit more reasonable.
             */
            op->value = op->value * op->inv->value * (op->level + 50) / (op->inv->level + 50);
            /* maxhp is used to denote how many 'charges' the rod holds before */
            if (op->stats.maxhp)
              op->stats.maxhp *= MAX (op->inv->stats.sp, op->inv->stats.grace);
            else
              op->stats.maxhp = 2 * MAX (op->inv->stats.sp, op->inv->stats.grace);

            op->stats.hp = op->stats.maxhp;
            break;

          case SCROLL:
            op->level = level_for_item (op, difficulty);
            op->value = op->value * op->inv->value * (op->level + 50) / (op->inv->level + 50);

            /* add exp so reading them properly gives xp */
            op->stats.exp = op->value / 5;
            op->nrof = op->inv->nrof;
            break;

          case RUNE:
            trap_adjust (op, difficulty);
            break;

          case TRAP:
            trap_adjust (op, difficulty);
            break;
      }                         /* switch type */

  if (flags & GT_STARTEQUIP)
    {
      if (op->nrof < 2 && op->type != CONTAINER && op->type != MONEY && !QUERY_FLAG (op, FLAG_IS_THROWN))
        SET_FLAG (op, FLAG_STARTEQUIP);
      else if (op->type != MONEY)
        op->value = 0;
    }

  if (!(flags & GT_ENVIRONMENT))
    fix_flesh_item (op, creator);
}

/*
 *
 *
 * CODE DEALING WITH ARTIFACTS STARTS HERE
 *
 *
 */

/*
 * Allocate and return the pointer to an empty artifactlist structure.
 */
static artifactlist *
get_empty_artifactlist (void)
{
  artifactlist *al = (artifactlist *) malloc (sizeof (artifactlist));

  if (al == NULL)
    fatal (OUT_OF_MEMORY);
  al->next = NULL;
  al->items = NULL;
  al->total_chance = 0;
  return al;
}

/*
 * Allocate and return the pointer to an empty artifact structure.
 */
static artifact *
get_empty_artifact (void)
{
  artifact *a = (artifact *) malloc (sizeof (artifact));

  if (a == NULL)
    fatal (OUT_OF_MEMORY);

  a->item = NULL;
  a->next = NULL;
  a->chance = 0;
  a->difficulty = 0;
  a->allowed = NULL;
  return a;
}

/*
 * Searches the artifact lists and returns one that has the same type
 * of objects on it.
 */
artifactlist *
find_artifactlist (int type)
{
  artifactlist *al;

  for (al = first_artifactlist; al; al = al->next)
    if (al->type == type)
      return al;

  return 0;
}

/*
 * For debugging purposes.  Dumps all tables.
 */
void
dump_artifacts (void)
{
  artifactlist *al;
  artifact *art;
  linked_char *next;

  fprintf (logfile, "\n");
  for (al = first_artifactlist; al != NULL; al = al->next)
    {
      fprintf (logfile, "Artifact has type %d, total_chance=%d\n", al->type, al->total_chance);
      for (art = al->items; art != NULL; art = art->next)
        {
          fprintf (logfile, "Artifact %-30s Difficulty %3d Chance %5d\n", &art->item->name, art->difficulty, art->chance);
          if (art->allowed != NULL)
            {
              fprintf (logfile, "\tallowed combinations:");
              for (next = art->allowed; next != NULL; next = next->next)
                fprintf (logfile, "%s,", &next->name);
              fprintf (logfile, "\n");
            }
        }
    }
  fprintf (logfile, "\n");
}

/*
 * For debugging purposes.  Dumps all treasures recursively (see below).
 */
void
dump_monster_treasure_rec (const char *name, treasure *t, int depth)
{
  treasurelist *tl;
  int i;

  if (depth > 100)
    return;
  while (t)
    {
      if (t->name)
        {
          for (i = 0; i < depth; i++)
            fprintf (logfile, "  ");
          fprintf (logfile, "{   (list: %s)\n", &t->name);
          tl = find_treasurelist (t->name);
          if (tl)
            dump_monster_treasure_rec (name, tl->items, depth + 2);
          for (i = 0; i < depth; i++)
            fprintf (logfile, "  ");
          fprintf (logfile, "}   (end of list: %s)\n", &t->name);
        }
      else
        {
          for (i = 0; i < depth; i++)
            fprintf (logfile, "  ");
          if (t->item && t->item->clone.type == FLESH)
            fprintf (logfile, "%s's %s\n", name, &t->item->clone.name);
          else
            fprintf (logfile, "%s\n", &t->item->clone.name);
        }

      if (t->next_yes)
        {
          for (i = 0; i < depth; i++)
            fprintf (logfile, "  ");
          fprintf (logfile, " (if yes)\n");
          dump_monster_treasure_rec (name, t->next_yes, depth + 1);
        }

      if (t->next_no)
        {
          for (i = 0; i < depth; i++)
            fprintf (logfile, "  ");
          fprintf (logfile, " (if no)\n");
          dump_monster_treasure_rec (name, t->next_no, depth + 1);
        }

      t = t->next;
    }
}

/*
 * For debugging purposes.  Dumps all treasures for a given monster.
 * Created originally by Raphael Quinet for debugging the alchemy code.
 */

void
dump_monster_treasure (const char *name)
{
  archetype *at;
  int found;

  found = 0;
  fprintf (logfile, "\n");

  for (at = first_archetype; at != NULL; at = at->next)
    if (!strcasecmp (at->clone.name, name) && at->clone.title == NULL)
      {
        fprintf (logfile, "treasures for %s (arch: %s)\n", &at->clone.name, &at->name);
        if (at->clone.randomitems != NULL)
          dump_monster_treasure_rec (at->clone.name, at->clone.randomitems->items, 1);
        else
          fprintf (logfile, "(nothing)\n");

        fprintf (logfile, "\n");
        found++;
      }

  if (found == 0)
    fprintf (logfile, "No objects have the name %s!\n\n", name);
}

/*
 * Builds up the lists of artifacts from the file in the libdir.
 */
void
init_artifacts (void)
{
  static int has_been_inited = 0;
  char filename[MAX_BUF], buf[HUGE_BUF], *cp, *next;
  artifact *art = NULL;
  int value;
  artifactlist *al;

  if (has_been_inited)
    return;
  else
    has_been_inited = 1;

  sprintf (filename, "%s/artifacts", settings.datadir);
  object_thawer f (filename);

  if (!f)
    return;

  f.next ();

  for (;;)
    {
      switch (f.kw)
        {
          case KW_allowed:
            if (!art)
              {
                art = get_empty_artifact ();
                nrofartifacts++;
              }

            {
              if (!strcmp (f.get_str (), "all"))
                break;

              char *next, *cp = f.get_str ();

              do
                {
                  nrofallowedstr++;

                  if ((next = strchr (cp, ',')))
                    *next++ = '\0';

                  linked_char *tmp = new linked_char;

                  tmp->name = cp;
                  tmp->next = art->allowed;
                  art->allowed = tmp;
                }
              while ((cp = next));
            }
            break;

          case KW_chance:
            f.get (art->chance);
            break;

          case KW_difficulty:
            f.get (art->difficulty);
            break;

          case KW_object:
            {
              art->item = object::create ();

              if (!art->item->parse_kv (f))
                LOG (llevError, "Init_Artifacts: Could not load object.\n");

              al = find_artifactlist (art->item->type);

              if (!al)
                {
                  al = get_empty_artifactlist ();
                  al->type = art->item->type;
                  al->next = first_artifactlist;
                  first_artifactlist = al;
                }

              art->next = al->items;
              al->items = art;
              art = 0;
            }
            continue;

          case KW_EOF:
            goto done;

          default:
            if (!f.parse_error ("artifacts file"))
              cleanup ("artifacts file required");
            break;
        }

      f.next ();
    }

done:
  for (al = first_artifactlist; al; al = al->next)
    {
      for (art = al->items; art; art = art->next)
        {
          if (!art->chance)
            LOG (llevError, "Warning: artifact with no chance: %s\n", &art->item->name);
          else
            al->total_chance += art->chance;
        }
#if 0
      LOG (llevDebug, "Artifact list type %d has %d total chance\n", al->type, al->total_chance);
#endif
    }

  LOG (llevDebug, "done.\n");
}


/*
 * Used in artifact generation.  The bonuses of the first object
 * is modified by the bonuses of the second object.
 */

void
add_abilities (object *op, object *change)
{
  int i, tmp;

  if (change->face != blank_face)
    {
#ifdef TREASURE_VERBOSE
      LOG (llevDebug, "FACE: %d\n", change->face->number);
#endif
      op->face = change->face;
    }

  for (i = 0; i < NUM_STATS; i++)
    change_attr_value (&(op->stats), i, get_attr_value (&(change->stats), i));

  op->attacktype |= change->attacktype;
  op->path_attuned |= change->path_attuned;
  op->path_repelled |= change->path_repelled;
  op->path_denied |= change->path_denied;
  op->move_type |= change->move_type;
  op->stats.luck += change->stats.luck;

  if (QUERY_FLAG (change, FLAG_CURSED))
    SET_FLAG (op, FLAG_CURSED);
  if (QUERY_FLAG (change, FLAG_DAMNED))
    SET_FLAG (op, FLAG_DAMNED);
  if ((QUERY_FLAG (change, FLAG_CURSED) || QUERY_FLAG (change, FLAG_DAMNED)) && op->magic > 0)
    set_abs_magic (op, -op->magic);

  if (QUERY_FLAG (change, FLAG_LIFESAVE))
    SET_FLAG (op, FLAG_LIFESAVE);
  if (QUERY_FLAG (change, FLAG_REFL_SPELL))
    SET_FLAG (op, FLAG_REFL_SPELL);
  if (QUERY_FLAG (change, FLAG_STEALTH))
    SET_FLAG (op, FLAG_STEALTH);
  if (QUERY_FLAG (change, FLAG_XRAYS))
    SET_FLAG (op, FLAG_XRAYS);
  if (QUERY_FLAG (change, FLAG_BLIND))
    SET_FLAG (op, FLAG_BLIND);
  if (QUERY_FLAG (change, FLAG_SEE_IN_DARK))
    SET_FLAG (op, FLAG_SEE_IN_DARK);
  if (QUERY_FLAG (change, FLAG_REFL_MISSILE))
    SET_FLAG (op, FLAG_REFL_MISSILE);
  if (QUERY_FLAG (change, FLAG_MAKE_INVIS))
    SET_FLAG (op, FLAG_MAKE_INVIS);

  if (QUERY_FLAG (change, FLAG_STAND_STILL))
    {
      CLEAR_FLAG (op, FLAG_ANIMATE);
      /* so artifacts will join */
      if (!QUERY_FLAG (op, FLAG_ALIVE))
        op->speed = 0.0;

      op->set_speed (op->speed);
    }

  if (change->nrof)
    op->nrof = rndm (change->nrof) + 1;

  op->stats.exp += change->stats.exp;   /* Speed modifier */
  op->stats.wc += change->stats.wc;
  op->stats.ac += change->stats.ac;

  if (change->other_arch)
    {
      /* Basically, for horns & potions, the other_arch field is the spell
       * to cast.  So convert that to into a spell and put it into
       * this object.
       */
      if (op->type == HORN || op->type == POTION)
        {
          object *tmp_obj;

          /* Remove any spells this object currently has in it */
          while (op->inv)
            op->inv->destroy ();

          tmp_obj = arch_to_object (change->other_arch);
          insert_ob_in_ob (tmp_obj, op);
        }
      /* No harm setting this for potions/horns */
      op->other_arch = change->other_arch;
    }

  if (change->stats.hp < 0)
    op->stats.hp = -change->stats.hp;
  else
    op->stats.hp += change->stats.hp;

  if (change->stats.maxhp < 0)
    op->stats.maxhp = -change->stats.maxhp;
  else
    op->stats.maxhp += change->stats.maxhp;

  if (change->stats.sp < 0)
    op->stats.sp = -change->stats.sp;
  else
    op->stats.sp += change->stats.sp;

  if (change->stats.maxsp < 0)
    op->stats.maxsp = -change->stats.maxsp;
  else
    op->stats.maxsp += change->stats.maxsp;

  if (change->stats.food < 0)
    op->stats.food = -(change->stats.food);
  else
    op->stats.food += change->stats.food;

  if (change->level < 0)
    op->level = -(change->level);
  else
    op->level += change->level;

  if (change->gen_sp_armour < 0)
    op->gen_sp_armour = -(change->gen_sp_armour);
  else
    op->gen_sp_armour = (op->gen_sp_armour * (change->gen_sp_armour)) / 100;

  op->item_power = change->item_power;

  for (i = 0; i < NROFATTACKS; i++)
    if (change->resist[i])
      op->resist[i] += change->resist[i];

  if (change->stats.dam)
    {
      if (change->stats.dam < 0)
        op->stats.dam = (-change->stats.dam);
      else if (op->stats.dam)
        {
          tmp = (signed char) (((int) op->stats.dam * (int) change->stats.dam) / 10);
          if (tmp == op->stats.dam)
            {
              if (change->stats.dam < 10)
                op->stats.dam--;
              else
                op->stats.dam++;
            }
          else
            op->stats.dam = tmp;
        }
    }

  if (change->weight)
    {
      if (change->weight < 0)
        op->weight = (-change->weight);
      else
        op->weight = (op->weight * (change->weight)) / 100;
    }

  if (change->last_sp)
    {
      if (change->last_sp < 0)
        op->last_sp = (-change->last_sp);
      else
        op->last_sp = (signed char) (((int) op->last_sp * (int) change->last_sp) / (int) 100);
    }

  if (change->gen_sp_armour)
    {
      if (change->gen_sp_armour < 0)
        op->gen_sp_armour = (-change->gen_sp_armour);
      else
        op->gen_sp_armour = (signed char) (((int) op->gen_sp_armour * ((int) change->gen_sp_armour)) / (int) 100);
    }

  op->value *= change->value;

  if (change->materials)
    op->materials = change->materials;

  if (change->materialname)
    op->materialname = change->materialname;

  if (change->slaying)
    op->slaying = change->slaying;

  if (change->race)
    op->race = change->race;

  if (change->msg)
    op->msg = change->msg;
}

static int
legal_artifact_combination (object *op, artifact * art)
{
  int neg, success = 0;
  linked_char *tmp;
  const char *name;

  if (art->allowed == (linked_char *) NULL)
    return 1;                   /* Ie, "all" */
  for (tmp = art->allowed; tmp; tmp = tmp->next)
    {
#ifdef TREASURE_VERBOSE
      LOG (llevDebug, "legal_art: %s\n", tmp->name);
#endif
      if (*tmp->name == '!')
        name = tmp->name + 1, neg = 1;
      else
        name = tmp->name, neg = 0;

      /* If we match name, then return the opposite of 'neg' */
      if (!strcmp (name, op->name) || (op->arch && !strcmp (name, op->arch->name)))
        return !neg;

      /* Set success as true, since if the match was an inverse, it means
       * everything is allowed except what we match
       */
      else if (neg)
        success = 1;
    }
  return success;
}

/*
 * Fixes the given object, giving it the abilities and titles
 * it should have due to the second artifact-template.
 */

void
give_artifact_abilities (object *op, object *artifct)
{
  char new_name[MAX_BUF];

  sprintf (new_name, "of %s", &artifct->name);
  op->title = new_name;
  add_abilities (op, artifct);  /* Give out the bonuses */

#if 0                           /* Bit verbose, but keep it here until next time I need it... */
  {
    char identified = QUERY_FLAG (op, FLAG_IDENTIFIED);

    SET_FLAG (op, FLAG_IDENTIFIED);
    LOG (llevDebug, "Generated artifact %s %s [%s]\n", op->name, op->title, describe_item (op, NULL));
    if (!identified)
      CLEAR_FLAG (op, FLAG_IDENTIFIED);
  }
#endif
  return;
}

/*
 * Decides randomly which artifact the object should be
 * turned into.  Makes sure that the item can become that
 * artifact (means magic, difficulty, and Allowed fields properly).
 * Then calls give_artifact_abilities in order to actually create
 * the artifact.
 */

/* Give 1 re-roll attempt per artifact */
#define ARTIFACT_TRIES 2

void
generate_artifact (object *op, int difficulty)
{
  artifactlist *al;
  artifact *art;
  int i;

  al = find_artifactlist (op->type);

  if (al == NULL)
    {
#if 0                           /* This is too verbose, usually */
      LOG (llevDebug, "Couldn't change %s into artifact - no table.\n", op->name);
#endif
      return;
    }

  for (i = 0; i < ARTIFACT_TRIES; i++)
    {
      int roll = rndm (al->total_chance);

      for (art = al->items; art; art = art->next)
        {
          roll -= art->chance;
          if (roll < 0)
            break;
        }

      if (art == NULL || roll >= 0)
        {
#if 1
          LOG (llevError, "Got null entry and non zero roll in generate_artifact, type %d\n", op->type);
#endif
          return;
        }
      if (!strcmp (art->item->name, "NONE"))
        return;
      if (FABS (op->magic) < art->item->magic)
        continue;               /* Not magic enough to be this item */

      /* Map difficulty not high enough */
      if (difficulty < art->difficulty)
        continue;

      if (!legal_artifact_combination (op, art))
        {
#ifdef TREASURE_VERBOSE
          LOG (llevDebug, "%s of %s was not a legal combination.\n", op->name, art->item->name);
#endif
          continue;
        }
      give_artifact_abilities (op, art->item);
      return;
    }
}

/* fix_flesh_item() - objects of type FLESH are similar to type
 * FOOD, except they inherit properties (name, food value, etc).
 * based on the original owner (or 'donor' if you like). -b.t.
 */

void
fix_flesh_item (object *item, object *donor)
{
  char tmpbuf[MAX_BUF];
  int i;

  if (item->type == FLESH && donor)
    {
      /* change the name */
      sprintf (tmpbuf, "%s's %s", &donor->name, &item->name);
      item->name = tmpbuf;
      sprintf (tmpbuf, "%s's %s", &donor->name, &item->name_pl);
      item->name_pl = tmpbuf;

      /* weight is FLESH weight/100 * donor */
      if ((item->weight = (signed long) (((double) item->weight / (double) 100.0) * (double) donor->weight)) == 0)
        item->weight = 1;

      /* value is multiplied by level of donor */
      item->value *= isqrt (donor->level * 2);

      /* food value */
      item->stats.food += (donor->stats.hp / 100) + donor->stats.Con;

      /* flesh items inherit some abilities of donor, but not
       * full effect.
       */
      for (i = 0; i < NROFATTACKS; i++)
        item->resist[i] = donor->resist[i] / 2;

      /* item inherits donor's level (important for quezals) */
      item->level = donor->level;

      /* if donor has some attacktypes, the flesh is poisonous */
      if (donor->attacktype & AT_POISON)
        item->type = POISON;
      if (donor->attacktype & AT_ACID)
        item->stats.hp = -1 * item->stats.food;
      SET_FLAG (item, FLAG_NO_STEAL);
    }
}

/* special_potion() - so that old potion code is still done right. */

int
special_potion (object *op)
{
  if (op->attacktype)
    return 1;

  if (op->stats.Str || op->stats.Dex || op->stats.Con || op->stats.Pow || op->stats.Wis || op->stats.Int || op->stats.Cha)
    return 1;

  for (int i = 0; i < NROFATTACKS; i++)
    if (op->resist[i])
      return 1;

  return 0;
}

void
free_treasurestruct (treasure *t)
{
  if (t->next)
    free_treasurestruct (t->next);
  if (t->next_yes)
    free_treasurestruct (t->next_yes);
  if (t->next_no)
    free_treasurestruct (t->next_no);

  delete t;
}

void
free_charlinks (linked_char *lc)
{
  if (lc->next)
    free_charlinks (lc->next);

  delete lc;
}

void
free_artifact (artifact * at)
{
  if (at->next)
    free_artifact (at->next);

  if (at->allowed)
    free_charlinks (at->allowed);

  at->item->destroy (1);

  delete at;
}

void
free_artifactlist (artifactlist * al)
{
  artifactlist *nextal;

  for (al = first_artifactlist; al; al = nextal)
    {
      nextal = al->next;

      if (al->items)
        free_artifact (al->items);

      free (al);
    }
}

void
free_all_treasures (void)
{
  treasurelist *tl, *next;


  for (tl = first_treasurelist; tl != NULL; tl = next)
    {
      next = tl->next;
      if (tl->items)
        free_treasurestruct (tl->items);
      delete tl;
    }
  free_artifactlist (first_artifactlist);
}
Revision:	1.38
Committed:	Fri Feb 16 19:43:41 2007 UTC (17 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.37:	+80 -66 lines
Log Message:	- identified random memory corrutpion bug - fixed most likely cause for bug above - rewrote object loader etc. into a simple one-line lookahead parser. - rewrote/cleaned up archetype, treasure, artifact, formula parser. - some optimisations / cleanups