contrib/bind-9.2.4rc7/lib/isc/bufferlist.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2001  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and 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 1.12.2.1 2004/03/09 06:11:45 marka Exp $ */
  19
  20 #include <config.h>
  21
  22 #include <stddef.h>
  23
  24 #include <isc/buffer.h>
  25 #include <isc/bufferlist.h>
  26 #include <isc/util.h>
  27
  28 unsigned int
  29 isc_bufferlist_usedcount(isc_bufferlist_t *bl) {
  30         isc_buffer_t *buffer;
  31         unsigned int length;
  32
  33         REQUIRE(bl != NULL);
  34
  35         length = 0;
  36         buffer = ISC_LIST_HEAD(*bl);
  37         while (buffer != NULL) {
  38                 REQUIRE(ISC_BUFFER_VALID(buffer));
  39                 length += isc_buffer_usedlength(buffer);
  40                 buffer = ISC_LIST_NEXT(buffer, link);
  41         }
  42
  43         return (length);
  44 }
  45
  46 unsigned int
  47 isc_bufferlist_availablecount(isc_bufferlist_t *bl) {
  48         isc_buffer_t *buffer;
  49         unsigned int length;
  50
  51         REQUIRE(bl != NULL);
  52
  53         length = 0;
  54         buffer = ISC_LIST_HEAD(*bl);
  55         while (buffer != NULL) {
  56                 REQUIRE(ISC_BUFFER_VALID(buffer));
  57                 length += isc_buffer_availablelength(buffer);
  58                 buffer = ISC_LIST_NEXT(buffer, link);
  59         }
  60
  61         return (length);
  62 }