contrib/bind-9.5.2/lib/isc/bufferlist.c

   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
  30 unsigned int
  31 isc_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
  48 unsigned int
  49 isc_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 }