/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */


#ident  "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.6   */
/* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */

#include "errno.h"
#include "string.h"
#include "stdlib.h"

#include "lp.h"
#include "filters.h"

/**
 ** getfilter() - GET FILTER FROM FILTER TABLE
 **/

FILTER *
#if     defined(__STDC__)
getfilter (
        char *                  name
)
#else
getfilter (name)
        char                    *name;
#endif
{
        static _FILTER          *pf     = 0;

        static FILTER           flbuf;


        if (!name || !*name) {
                errno = EINVAL;
                return (0);
        }

        /*
         * Don't need to check for ENOENT, because if it is set,
         * well that's what we want to return anyway!
         */
        if (!filters && get_and_load() == -1 /* && errno != ENOENT */ )
                return (0);

        if (STREQU(NAME_ALL, name))
                if (pf) {
                        if (!(++pf)->name)
                                pf = 0;
                } else
                        pf = filters;
        else
                pf = search_filter(name);

        if (!pf || !pf->name) {
                errno = ENOENT;
                return (0);
        }

        flbuf.name = Strdup(pf->name);
        flbuf.command = (pf->command? Strdup(pf->command) : 0);
        flbuf.type = pf->type;
        flbuf.printer_types = typel_to_sl(pf->printer_types);
        flbuf.printers = duplist(pf->printers);
        flbuf.input_types = typel_to_sl(pf->input_types);
        flbuf.output_types = typel_to_sl(pf->output_types);
        flbuf.templates = templatel_to_sl(pf->templates);

        /*
         * Make sure a subsequent ``all'' query starts getting
         * filters from the beginning.
         */
        if (!STREQU(NAME_ALL, name))
                pf = 0;

        return (&flbuf);
}