/*
 * The implementation of scarabs.
 *
 * This file knows there is always exactly one scarab of each type.
 *  This simplifies monster flag setting in moved_scarab(), which would
 *  otherwise have to consider the possibility that there is another
 *  scarab of the same type in the from inventory.
 */

#include "obj.h"
#include "util.h"
#include "vars.h"
#include "pline.h"
#include "format.h"
#include "structs.h"
#include "objtypes.h"

static unsigned int flagbit(int ot)
{
 switch (ot)
  { case OBJ_SCARAB_OF_EARTH: return(MBF_PLANE_E); break;
    case OBJ_SCARAB_OF_AIR:   return(MBF_PLANE_A); break;
    case OBJ_SCARAB_OF_FIRE:  return(MBF_PLANE_F); break;
    case OBJ_SCARAB_OF_WATER: return(MBF_PLANE_W); break;
  }
 panic("impossible flagbit()");
}

static int identified_scarab(INVOBJ *io)
{
 return(!!(objtypes[io->v[0]->type].flags&OTF_KNOWN));
}

static INVOBJ *identify_scarab(INVOBJ *io)
{
 objtypes[io->v[0]->type].flags |= OTF_KNOWN;
 return(io);
}

static void moved_scarab(INVOBJ *io, INVENT *from, INVENT *to)
{
 unsigned int flag;

 flag = flagbit(io->v[0]->type);
 if (from && (from->type == IT_MON)) from->u.m->baseflags &= ~flag;
 if (to && (to->type == IT_MON)) to->u.m->baseflags |= flag;
}

#define new_scarab noop_new
#define old_scarab noop_old
#define format_scarab std_format
#define fmt_cond_scarab panic_fmt_cond
#define fmt_spec_scarab panic_fmt_spec
#define collapsible_scarab never_collapsible
#define identical_scarab never_identical
#define split_scarab std_split
#define cursable_scarab 0
#define setcursed_scarab setcursed_uncursable
OBJOPS objops_scarab = OBJOPS_INIT(scarab);