server/common/treasure.c


/*
 * static char *rcs_treasure_c =
 *   "$Id$";
 */

/*
    CrossFire, A Multiplayer game for X-windows

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

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    The authors can be reached via e-mail at crossfire-devel@real-time.com
*/

#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 = find_archetype("ring");
  if (amulet_arch == NULL)
    amulet_arch = find_archetype("amulet");
  if (staff_arch == NULL)
    staff_arch = find_archetype("staff");
  if (crown_arch == NULL)
    crown_arch = find_archetype("crown");
  warn_archetypes = prev_warn;
}

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

static treasurelist *get_empty_treasurelist(void) {
  treasurelist *tl = (treasurelist *) malloc(sizeof(treasurelist));
  if(tl==NULL)
    fatal(OUT_OF_MEMORY);
  memset(tl, 0, sizeof(treasurelist));
  return tl;
}

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

static treasure *get_empty_treasure(void) {
  treasure *t = (treasure *) calloc(1,sizeof(treasure));
  if(t==NULL)
    fatal(OUT_OF_MEMORY);
  t->item=NULL;
  t->name=NULL;
  t->next=NULL;
  t->next_yes=NULL;
  t->next_no=NULL;
  t->chance=100;
  t->magic=0;
  t->nrof=0;
  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=find_archetype(variable))==NULL)
                LOG(llevError,"Treasure lacks archetype: %s\n",variable);
        } else if (sscanf(cp, "list %s", variable))
            t->name = add_string(variable);
        else if (sscanf(cp, "change_name %s", variable))
            t->change_arch.name = add_string(variable);
        else if (sscanf(cp, "change_title %s", variable))
            t->change_arch.title = add_string(variable);
        else if (sscanf(cp, "change_slaying %s", variable))
            t->change_arch.slaying = add_string(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?t->name:"null", *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->item==NULL && t->name==NULL)
        LOG(llevError,"Treasurelist %s has element with no name or archetype\n", tl->name);
    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 && strcmp(t->name,"NONE"))
        (void) 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=add_string(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) {
  const char *tmp=find_string(name);
  treasurelist *tl;

  /* Special cases - randomitems of none is to override default.  If
   * first_treasurelist is null, it means we are on the first pass of
   * of loading archetyps, so for now, just return - second pass will
   * init these values.
   */
  if (!strcmp(name,"none") || (!first_treasurelist)) return NULL;
  if(tmp!=NULL)
    for(tl=first_treasurelist;tl!=NULL;tl=tl->next)
      if(tmp==tl->name)
        return tl;
  LOG(llevError,"Couldn't find treasurelist %s\n",name);
  return NULL;
}


/*
 * 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) {
        op->x = creator->x;
        op->y = creator->y;
        SET_FLAG(op, FLAG_OBJ_ORIGINAL);
        insert_ob_in_map (op, creator->map,op,INS_NO_MERGE | INS_NO_WALK_ON);
    } else {
        op = insert_ob_in_ob (op, creator);
        if ((flags & GT_APPLY) && QUERY_FLAG (creator, FLAG_MONSTER))
            monster_check_apply(creator, op);
        if ((flags & GT_UPDATE_INV) && (tmp = is_player_inv (creator)) != NULL)
            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)
    {
        FREE_AND_COPY(op->name, t->change_arch.name);
        /* not great, but better than something that is completely wrong */
        FREE_AND_COPY(op->name_pl, t->change_arch.name);
    }
    
    if(t->change_arch.title)
    {
        if(op->title)
            free_string(op->title);
        op->title = add_string(t->change_arch.title);
    }

    if(t->change_arch.slaying)
    {
        if(op->slaying)
            free_string(op->slaying);
        op->slaying = add_string(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 || (RANDOM()%100 + 1) < (int) t->chance) {
    if (t->name) {
        if (strcmp(t->name,"NONE") && difficulty>=t->magic)
          {
            create_treasure(find_treasurelist(t->name), op, flag, difficulty, tries);
          }
    }
    else {
      if(t->item->clone.invisible != 0 || ! (flag & GT_INVISIBLE)) {
        tmp=arch_to_object(t->item);
        if(t->nrof&&tmp->nrof<=1)
          tmp->nrof = RANDOM()%((int) 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 = RANDOM() % 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 (!strcmp(t->name,"NONE")) return;
        if (difficulty>=t->magic)
            create_treasure(find_treasurelist(t->name), 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 = RANDOM()%((int) 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 *t, object *op, int flag, int difficulty,
        int tries)
{

    if (tries++>100) {
        LOG(llevDebug,"createtreasure: tries exceeded 100, returning without making treasure\n");
        return;
    }
    if (t->total_chance) 
        create_one_treasure(t, op, flag,difficulty, tries);
    else
        create_all_treasures(t->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 *t, int difficulty)
{
        object *ob = get_object(), *tmp;

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

        /* Don't want to free the object we are about to return */
        tmp = ob->inv;
        if (tmp!=NULL) remove_ob(tmp);
        if (ob->inv) {
            LOG(llevError,"In generate treasure, created multiple objects.\n");
        }
        free_object(ob);
        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 mult = 0, olevel = 0;

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

  olevel = 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 = ((double) difficulty / settings.max_level) * DIFFLEVELS;

  scaled_diff--;

  if(scaled_diff < 0)
    scaled_diff = 0;

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

  percent = RANDOM()%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 = (RANDOM() % 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 && !(RANDOM()%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 && !(RANDOM()%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=RANDOM()%(bonus>0?25:11);

    if(op->type==AMULET) {
        if(!(RANDOM()%21))
            r=20+RANDOM()%2;
        else {
            if(RANDOM()&2)
                r=10;
            else
                r=11+RANDOM()%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+FABS(bonus),val,resist=RANDOM() % num_resist_table;

            /* Roughly generate a bonus between 100 and 35 (depending on the bonus) */
            val = 10 + RANDOM() % b + RANDOM() % b + RANDOM() % b + RANDOM() % 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 - RANDOM() % b;
            if (val>35) val=35; /* Upper limit */
            b=0;
            while (op->resist[resist_table[resist]]!=0 && b<4) {
                resist=RANDOM() % 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(RANDOM()%diff) return i;
  return 4;
}

#define DICE2   (get_magic(2)==2?2:1)
#define DICESPELL (RANDOM()%3+RANDOM()%3+RANDOM()%3+RANDOM()%3+RANDOM()%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 (!(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 && !(RANDOM () % 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) && !(RANDOM () % 4))
          set_ring_bonus (op, -DICE2);
        break;

      case BRACERS:
        if (!(RANDOM () % (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 + RANDOM () % difficulty
                + RANDOM () % difficulty;
            }
          else
            {
              FREE_AND_COPY (op->name, "potion");
              FREE_AND_COPY (op->name_pl, "potions");
            }
          if (!(flags & GT_ONLY_GOOD) && RANDOM () % 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)
          {
            remove_ob (op);
            free_object (op);
            op = NULL;
            break;
          }

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

        if (!(flags & GT_ONLY_GOOD) && !(RANDOM () % 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 (!(RANDOM () % 4))
          {
            int d = (RANDOM () % 2
                     || QUERY_FLAG (op, FLAG_CURSED)) ? -DICE2 : DICE2;

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

            set_ring_bonus (op, d);

            if (!(RANDOM () % 4))
              {
                int d = (RANDOM () % 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, RANDOM () % ((int) 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 && RANDOM () % 10)
          {
            /* set the book level properly */
            if (creator->level == 0 || QUERY_FLAG (creator, FLAG_ALIVE))
              {
                if (op->map && op->map->difficulty)
                  op->level =
                    RANDOM () % (op->map->difficulty) + RANDOM () % 10 + 1;
                else
                  op->level = RANDOM () % 20 + 1;
              }
            else
              op->level = RANDOM () % 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 = add_string (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 *tl = (artifactlist *) malloc(sizeof(artifactlist));
  if(tl==NULL)
    fatal(OUT_OF_MEMORY);
  tl->next=NULL;
  tl->items=NULL;
  tl->total_chance=0;
  return tl;
}

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

static artifact *get_empty_artifact(void) {
  artifact *t = (artifact *) malloc(sizeof(artifact));
  if(t==NULL)
    fatal(OUT_OF_MEMORY);
  t->item=NULL;
  t->next=NULL;
  t->chance=0;
  t->difficulty=0;
  t->allowed = NULL;
  return t;
}

/*
 * 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!=NULL; al=al->next)
        if (al->type == type) return al;
  return NULL;
}

/*
 * 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 != NULL)
    {
      if (t->name != NULL)
        {
          for (i = 0; i < depth; i++)
            fprintf (logfile, "  ");
          fprintf (logfile, "{   (list: %s)\n", t->name);
          tl = find_treasurelist (t->name);
          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->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 != NULL)
        {
          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 != NULL)
        {
          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;
    FILE *fp;
    char filename[MAX_BUF], buf[HUGE_BUF], *cp, *next;
    artifact *art=NULL;
    linked_char *tmp;
    int value, comp;
    artifactlist *al;

    if (has_been_inited) return;
    else has_been_inited = 1;

    sprintf(filename, "%s/artifacts", settings.datadir);
    LOG(llevDebug, "Reading artifacts from %s...",filename);
    if ((fp = open_and_uncompress(filename, 0, &comp)) == NULL) {
        LOG(llevError, "Can't open %s.\n", filename);
        return;
    }

    while (fgets(buf, HUGE_BUF, fp)!=NULL) {
        if (*buf=='#') continue;
        if((cp=strchr(buf,'\n'))!=NULL)
            *cp='\0';
        cp=buf;
        while(*cp==' ') /* Skip blanks */
            cp++;
    if (*cp=='\0') continue;
    
        if (!strncmp(cp, "Allowed", 7)) {
                if (art==NULL) {
                  art=get_empty_artifact();
                  nrofartifacts++;
        }
            cp = strchr(cp,' ') + 1;
            if (!strcmp(cp,"all")) continue;

            do {
                nrofallowedstr++;
                if ((next=strchr(cp, ','))!=NULL)
                    *(next++) = '\0';
                tmp = (linked_char*) malloc(sizeof(linked_char));
                tmp->name = add_string(cp);
                tmp->next = art->allowed;
                art->allowed = tmp;
                } while ((cp=next)!=NULL);
        }
        else if (sscanf(cp, "chance %d", &value))
            art->chance = (uint16) value;
        else if (sscanf(cp, "difficulty %d", &value))
            art->difficulty = (uint8) value;
        else if (!strncmp(cp, "Object",6)) {
            art->item = (object *) calloc(1, sizeof(object));
            reset_object(art->item);
            if (!load_object(fp, art->item,LO_LINEMODE,0))
                LOG(llevError,"Init_Artifacts: Could not load object.\n");
            art->item->name = add_string((strchr(cp, ' ')+1));
            al=find_artifactlist(art->item->type);
            if (al==NULL) {
                al = get_empty_artifactlist();
                al->type = art->item->type;
                al->next = first_artifactlist;
                first_artifactlist = al;
            }
            art->next = al->items;
            al->items = art;
                art = NULL;
        }
        else
            LOG(llevError,"Unknown input in artifact file: %s\n", buf);
    }

    close_and_delete(fp, comp);

    for (al=first_artifactlist; al!=NULL; al=al->next) {
        for (art=al->items; art!=NULL; 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,j, 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;
        update_ob_speed(op);
    }
    if(change->nrof) op->nrof=RANDOM()%((int) 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) {
                tmp_obj = op->inv;
                remove_ob(tmp_obj);
                free_object(tmp_obj);
            }
            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->material)  op->material = change->material;

    if (change->materialname) {
        if (op->materialname)
            free_string(op->materialname);
        op->materialname = add_refcount(change->materialname);
    }

    if (change->slaying) {
        if (op->slaying)
            free_string(op->slaying);
        op->slaying = add_refcount(change->slaying);
    }
    if (change->race) {
        if (op->race)
            free_string(op->race);
        op->race = add_refcount(change->race);
    }
    if (change->msg) {
        if (op->msg)
            free_string(op->msg);
        op->msg = add_refcount(change->msg);
    }
    /* GROS: Added support for event_... in artifact file */
    for(j=0;j<NR_EVENTS;j++) {
        event *evt;
        event *evt2;
        event *evtn;
        event *evtp;

        evt = find_event(change,j);
        evt2= find_event(op,j);

        if ((evt) && (evt->hook)) {
            if ((evt2)&&(evt2->hook)) {
                free_string(evt2->hook);
                free_string(evt2->plugin);
                free_string(evt2->options);
                evtp = NULL;
                evtn = evt2->next;
                if (evt2 == op->events) {
                    free(evt2);
                    op->events = evtn;
                }
                else {
                    evtp = op->events;
                    while (evtp->next != evt2)
                        evtp = evtp->next;
                    free(evt2);
                    evtp->next = evtn;
                }
            }
            else if (evt2 == NULL) {
                if (op->events == NULL) {
                    evt2 = (event *)malloc(sizeof(event));
                    op->events = evt2;
                }
                else {
                    evtp = op->events;
                    while (evtp->next != NULL)
                        evtp = evtp->next;
                    evtp->next = (event *)malloc(sizeof(event));
                    evt2 = evtp->next;
                }
            }
            evt2->next = NULL;
            evt2->hook = add_refcount(evt->hook);
            evt2->plugin = add_refcount(evt->plugin);
            evt2->type = j;

            if (evt->options)
                evt2->options = add_refcount(evt->options);
            else
                evt2->options = NULL;
        }
    }
}

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);
  if (op->title)
    free_string(op->title);
  op->title = add_string(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 = RANDOM()% al->total_chance;

    for (art=al->items; art!=NULL; 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);
        FREE_AND_COPY(item->name, tmpbuf);
        sprintf(tmpbuf,"%s's %s",donor->name,item->name_pl);
        FREE_AND_COPY(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) {

    int i;

    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 (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);
        free(t);
}

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

void free_artifact(artifact *at)
{

    if (at->next) free_artifact(at->next);
    if (at->allowed) free_charlinks(at->allowed);
    if (at->item) {
        if (at->item->name) free_string(at->item->name);
        if (at->item->name_pl) free_string(at->item->name_pl);
        if (at->item->msg) free_string(at->item->msg);
        if (at->item->title) free_string(at->item->title);
        free(at->item);
    }
    free(at);
}

void free_artifactlist(artifactlist *al)
{
    artifactlist *nextal;
    for (al=first_artifactlist; al!=NULL; 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->name) free_string(tl->name);
        if (tl->items) free_treasurestruct(tl->items);
        free(tl);
    }
    free_artifactlist(first_artifactlist);
}
Revision:	1.5
Committed:	Fri Aug 11 12:40:22 2006 UTC (17 years, 9 months ago) by elmex
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LAST_C_VERSION
Changes since 1.4:	+12 -0 lines
Log Message:	merge of fix from crossfire, looks sane: Author: gros Log: Added explicit item_power calculation for generated items that got an item_power of 0 - should solve bug #1460354 without creating new issues. gros - 2006/07/21