dtextract.c

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#include        <cdt/dthdr.h>
#include        <stddef.h>
 
/*      Extract objects of a dictionary.
**
**      Written by Kiem-Phong Vo (5/25/96).
*/
 
Dtlink_t* dtextract(Dt_t* dt)
{
        Dtlink_t        *list, **s, **ends;
 
        if (dt->data.type & (DT_OSET|DT_OBAG))
                list = dt->data.here;
        else if (dt->data.type & DT_SET)
        {       list = dtflatten(dt);
                for (ends = (s = dt->data.htab) + dt->data.ntab; s < ends; ++s)
                        *s = NULL;
        }
        else // if (dt->data.type & (DT_LIST|DT_STACK))
        {       list = dt->data.head;
                dt->data.head = NULL;
        }
 
        dt->data.type &= ~DT_FLATTEN;
        dt->data.size = 0;
        dt->data.here = NULL;
 
        return list;
}