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dtsize.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*                  Copyright (c) 1985-2005 AT&T Corp.                  *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                            by AT&T Corp.                             *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#include    "dthdr.h"

/*    Return the # of objects in the dictionary
**
**    Written by Kiem-Phong Vo (5/25/96)
*/

#if __STD_C
static int treecount(reg Dtlink_t* e)
#else
static int treecount(e)
reg Dtlink_t*     e;
#endif
{     return e ? treecount(e->left) + treecount(e->right) + 1 : 0;
}

#if __STD_C
int dtsize(Dt_t* dt)
#else
int dtsize(dt)
Dt_t* dt;
#endif
{
      reg Dtlink_t*     t;
      reg int           size;

      UNFLATTEN(dt);

      if(dt->data->size < 0) /* !(dt->data->type&(DT_SET|DT_BAG)) */
      {     if(dt->data->type&(DT_OSET|DT_OBAG))
                  dt->data->size = treecount(dt->data->here);
            else if(dt->data->type&(DT_LIST|DT_STACK|DT_QUEUE))
            {     for(size = 0, t = dt->data->head; t; t = t->right)
                        size += 1;
                  dt->data->size = size;
            }
      }

      return dt->data->size;
}

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