/*
 * 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);
}