bind/lib/isc/bufferlist.c

/*
 * Copyright (C) 1999, 2000  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.
 */

#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);
}