dtclose.c

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#include        "dthdr.h"

/*      Close a dictionary
**
**      Written by Kiem-Phong Vo (05/25/96)
*/
int dtclose(reg Dt_t* dt)
{
        Dtdisc_t        *disc;
        int             ev = 0;

        if(!dt || dt->nview > 0 ) /* can't close if being viewed */
                return -1;

        /* announce the close event to see if we should continue */
        disc = dt->disc;
        if(disc->eventf &&
           (ev = (*disc->eventf)(dt,DT_CLOSE,NIL(void*),disc)) < 0)
                return -1;

        if(dt->view)    /* turn off viewing */
                dtview(dt,NIL(Dt_t*));

        if(ev == 0) /* release all allocated data */
        {       (void)(*(dt->meth->searchf))(dt,NIL(void*),DT_CLEAR);
                if(dtsize(dt) > 0)
                        return -1;

                if(dt->data->ntab > 0)
                        (*dt->memoryf)(dt,(void*)dt->data->htab,0,disc);
                (*dt->memoryf)(dt,(void*)dt->data,0,disc);
        }

        if(dt->type == DT_MALLOC)
                free((void*)dt);
        else if(ev == 0 && dt->type == DT_MEMORYF)
                (*dt->memoryf)(dt, (void*)dt, 0, disc);

        if(disc->eventf)
                (void)(*disc->eventf)(dt, DT_ENDCLOSE, NIL(void*), disc);

        return 0;
}