File: 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;
}