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/*
 * Copyright (C) 1999  Internet Software Consortium.
 * 
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

#ifndef DNS_FIXEDNAME_H
#define DNS_FIXEDNAME_H 1

/*****
 ***** Module Info
 *****/

/*
 * Fixed-size Names
 *
 * dns_fixedname_t is a convenience type containing a name, an offsets table,
 * and a dedicated buffer big enough for the longest possible name.
 *
 * MP:
 *	The caller must ensure any required synchronization.
 *
 * Reliability:
 *	No anticipated impact.
 *
 * Resources:
 *	Per dns_fixedname_t:
 *		sizeof(dns_name_t) + sizeof(dns_offsets_t) +
 *		sizeof(isc_buffer_t) + 255 bytes + structure padding
 *
 * Security:
 *	No anticipated impact.
 *
 * Standards:
 *	None.
 */

/*****
 ***** Imports
 *****/

#include <isc/buffer.h>
#include <isc/lang.h>

#include <dns/types.h>
#include <dns/name.h>
#include <dns/result.h>

ISC_LANG_BEGINDECLS

/*****
 ***** Types
 *****/

typedef struct dns_fixedname {
	dns_name_t	name;
	dns_offsets_t	offsets;
	isc_buffer_t	buffer;
	unsigned char	data[255];
} dns_fixedname_t;

#define dns_fixedname_init(fn) \
	do { \
		dns_name_init(&((fn)->name), (fn)->offsets); \
		isc_buffer_init(&((fn)->buffer), (fn)->data, 255, \
				ISC_BUFFERTYPE_BINARY); \
		dns_name_setbuffer(&((fn)->name), &((fn)->buffer)); \
	} while (0)

#define dns_fixedname_invalidate(fn) \
	dns_name_invalidate(&((fn)->name))

ISC_LANG_ENDDECLS

#endif /* DNS_FIXEDNAME_H */