usr/src/lib/libast/common/cdt/dtextract.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #include        "dthdr.h"
  23
  24 /*      Extract objects of a dictionary.
  25 **
  26 **      Written by Kiem-Phong Vo (5/25/96).
  27 */
  28
  29 #if __STD_C
  30 Dtlink_t* dtextract(reg Dt_t* dt)
  31 #else
  32 Dtlink_t* dtextract(dt)
  33 reg Dt_t*       dt;
  34 #endif
  35 {
  36         reg Dtlink_t    *list, **s, **ends;
  37
  38         if(dt->data->type&(DT_OSET|DT_OBAG) )
  39                 list = dt->data->here;
  40         else if(dt->data->type&(DT_SET|DT_BAG))
  41         {       list = dtflatten(dt);
  42                 for(ends = (s = dt->data->htab) + dt->data->ntab; s < ends; ++s)
  43                         *s = NIL(Dtlink_t*);
  44         }
  45         else /*if(dt->data->type&(DT_LIST|DT_STACK|DT_QUEUE))*/
  46         {       list = dt->data->head;
  47                 dt->data->head = NIL(Dtlink_t*);
  48         }
  49
  50         dt->data->type &= ~DT_FLATTEN;
  51         dt->data->size = 0;
  52         dt->data->here = NIL(Dtlink_t*);
  53
  54         return list;
  55 }