dtsize.c

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#include        "dthdr.h"

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

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

int dtsize(Dt_t* dt)
{
        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;
}