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dtclose.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2009 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                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"

/*    Close a dictionary
**
**    Written by Kiem-Phong Vo (05/25/96)
*/
#if __STD_C
int dtclose(reg Dt_t* dt)
#else
int dtclose(dt)
reg Dt_t*   dt;
#endif
{
      Dtdisc_t    *disc;
      int         ev = 0;

      if(!dt || dt->nview > 0 ) /* can't close if being viewed */
            return -1;

      /* announce the close event to see if we should continue */
      disc = dt->disc;
      if(disc->eventf &&
         (ev = (*disc->eventf)(dt,DT_CLOSE,NIL(Void_t*),disc)) < 0)
            return -1;

      if(dt->view)      /* turn off viewing */
            dtview(dt,NIL(Dt_t*));

      if(ev == 0) /* release all allocated data */
      {     (void)(*(dt->meth->searchf))(dt,NIL(Void_t*),DT_CLEAR);
            if(dtsize(dt) > 0)
                  return -1;

            if(dt->data->ntab > 0)
                  (*dt->memoryf)(dt,(Void_t*)dt->data->htab,0,disc);
            (*dt->memoryf)(dt,(Void_t*)dt->data,0,disc);
      }

      if(dt->type == DT_MALLOC)
            free((Void_t*)dt);
      else if(ev == 0 && dt->type == DT_MEMORYF)
            (*dt->memoryf)(dt, (Void_t*)dt, 0, disc);

      if(disc->eventf)
            (void)(*disc->eventf)(dt, DT_ENDCLOSE, NIL(Void_t*), disc);

      return 0;
}

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