external/bsd/ntp/dist/lib/isc/bufferlist.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 1999-2001  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: bufferlist.c,v 1.17 2007/06/19 23:47:17 tbox Exp */
  21
  22 /*! \file */
  23
  24 #include <config.h>
  25
  26 #include <stddef.h>
  27
  28 #include <isc/buffer.h>
  29 #include <isc/bufferlist.h>
  30 #include <isc/util.h>
  31
  32 unsigned int
  33 isc_bufferlist_usedcount(isc_bufferlist_t *bl) {
  34         isc_buffer_t *buffer;
  35         unsigned int length;
  36
  37         REQUIRE(bl != NULL);
  38
  39         length = 0;
  40         buffer = ISC_LIST_HEAD(*bl);
  41         while (buffer != NULL) {
  42                 REQUIRE(ISC_BUFFER_VALID(buffer));
  43                 length += isc_buffer_usedlength(buffer);
  44                 buffer = ISC_LIST_NEXT(buffer, link);
  45         }
  46
  47         return (length);
  48 }
  49
  50 unsigned int
  51 isc_bufferlist_availablecount(isc_bufferlist_t *bl) {
  52         isc_buffer_t *buffer;
  53         unsigned int length;
  54
  55         REQUIRE(bl != NULL);
  56
  57         length = 0;
  58         buffer = ISC_LIST_HEAD(*bl);
  59         while (buffer != NULL) {
  60                 REQUIRE(ISC_BUFFER_VALID(buffer));
  61                 length += isc_buffer_availablelength(buffer);
  62                 buffer = ISC_LIST_NEXT(buffer, link);
  63         }
  64
  65         return (length);
  66 }