dtsize.c   [plain text]

/*
    This software may only be used by you under license from AT&T Corp.
    ("AT&T").  A copy of AT&T's Source Code Agreement is available at
    AT&T's Internet website having the URL:
    <http://www.research.att.com/sw/tools/graphviz/license/source.html>
    If you received this software without first entering into a license
    with AT&T, you have an infringing copy of this software and cannot use
    it without violating AT&T's intellectual property rights.
*/
#include	"dthdr.h"

#ifdef DMALLOC
#include "dmalloc.h"
#endif

/*	Return the # of objects in the dictionary
**
**	Written by Kiem-Phong Vo (5/25/96)
*/

#if __STD_C
static int treecount(reg Dtlink_t* e)
#else
static int treecount(e)
reg Dtlink_t*	e;
#endif
{	return e ? treecount(e->left) + treecount(e->right) + 1 : 0;
}

#if __STD_C
int dtsize(Dt_t* dt)
#else
int dtsize(dt)
Dt_t*	dt;
#endif
{
	reg Dtlink_t*	t;
	reg int		size;

	UNFLATTEN(dt);

	if(dt->data->size < 0) /* !(dt->data->type&(DT_SET|DT_BAG)) */
	{	if(dt->data->type&(DT_OSET|DT_OBAG))
			dt->data->size = treecount(dt->data->here);
		else if(dt->data->type&(DT_LIST|DT_STACK|DT_QUEUE))
		{	for(size = 0, t = dt->data->head; t; t = t->right)
				size += 1;
			dt->data->size = size;
		}
	}

	return dt->data->size;
}