lib/isc/bufferlist.c

	bufferlist.c revision 0c27b3fe77ac1d5094ba3521e8142d9e7973133f
/*
 * Copyright (C) 1999-2001, 2004, 2005, 2007, 2016  Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/* $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);
}