bind/lib/isc/bufferlist.c

/*
 * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1999-2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC 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.
 */

/* $Id: bufferlist.c,v 1.17 2007/06/19 23:47:17 tbox Exp $ */

/*! \file */

#include <config.h>

#include <stddef.h>

#include <isc/buffer.h>
#include <isc/bufferlist.h>
#include <isc/util.h>

unsigned int
isc_bufferlist_usedcount(isc_bufferlist_t *bl) {
	isc_buffer_t *buffer;
	unsigned int length;

	REQUIRE(bl != NULL);

	length = 0;
	buffer = ISC_LIST_HEAD(*bl);
	while (buffer != NULL) {
		REQUIRE(ISC_BUFFER_VALID(buffer));
		length += isc_buffer_usedlength(buffer);
		buffer = ISC_LIST_NEXT(buffer, link);
	}

	return (length);
}

unsigned int
isc_bufferlist_availablecount(isc_bufferlist_t *bl) {
	isc_buffer_t *buffer;
	unsigned int length;

	REQUIRE(bl != NULL);

	length = 0;
	buffer = ISC_LIST_HEAD(*bl);
	while (buffer != NULL) {
		REQUIRE(ISC_BUFFER_VALID(buffer));
		length += isc_buffer_availablelength(buffer);
		buffer = ISC_LIST_NEXT(buffer, link);
	}

	return (length);
}