bufferlist.c revision 290001 
1/*
2 * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2001  Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id: bufferlist.c,v 1.17 2007/06/19 23:47:17 tbox Exp $ */
19
20/*! \file */
21
22#include <config.h>
23
24#include <stddef.h>
25
26#include <isc/buffer.h>
27#include <isc/bufferlist.h>
28#include <isc/util.h>
29
30unsigned int
31isc_bufferlist_usedcount(isc_bufferlist_t *bl) {
32	isc_buffer_t *buffer;
33	unsigned int length;
34
35	REQUIRE(bl != NULL);
36
37	length = 0;
38	buffer = ISC_LIST_HEAD(*bl);
39	while (buffer != NULL) {
40		REQUIRE(ISC_BUFFER_VALID(buffer));
41		length += isc_buffer_usedlength(buffer);
42		buffer = ISC_LIST_NEXT(buffer, link);
43	}
44
45	return (length);
46}
47
48unsigned int
49isc_bufferlist_availablecount(isc_bufferlist_t *bl) {
50	isc_buffer_t *buffer;
51	unsigned int length;
52
53	REQUIRE(bl != NULL);
54
55	length = 0;
56	buffer = ISC_LIST_HEAD(*bl);
57	while (buffer != NULL) {
58		REQUIRE(ISC_BUFFER_VALID(buffer));
59		length += isc_buffer_availablelength(buffer);
60		buffer = ISC_LIST_NEXT(buffer, link);
61	}
62
63	return (length);
64}
65