dtextract.c

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#include        "dthdr.h"

/*      Extract objects of a dictionary.
**
**      Written by Kiem-Phong Vo (5/25/96).
*/

Dtlink_t* dtextract(reg Dt_t* dt)
{
        reg Dtlink_t    *list, **s, **ends;

        if(dt->data->type&(DT_OSET|DT_OBAG) )
                list = dt->data->here;
        else if(dt->data->type&(DT_SET|DT_BAG))
        {       list = dtflatten(dt);
                for(ends = (s = dt->data->htab) + dt->data->ntab; s < ends; ++s)
                        *s = NIL(Dtlink_t*);
        }
        else /*if(dt->data->type&(DT_LIST|DT_STACK|DT_QUEUE))*/
        {       list = dt->data->head;
                dt->data->head = NIL(Dtlink_t*);
        }

        dt->data->type &= ~DT_FLATTEN;
        dt->data->size = 0;
        dt->data->here = NIL(Dtlink_t*);

        return list;
}