old-or-unused-stuff/bits.lisp

   1 ;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp -*-
   2
   3 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   4 ;   Copyright (C) 2006 by Stelian Ionescu                                 ;
   5 ;                                                                         ;
   6 ;   This program is free software; you can redistribute it and/or modify  ;
   7 ;   it under the terms of the GNU General Public License as published by  ;
   8 ;   the Free Software Foundation; either version 2 of the License, or     ;
   9 ;   (at your option) any later version.                                   ;
  10 ;                                                                         ;
  11 ;   This program is distributed in the hope that it will be useful,       ;
  12 ;   but WITHOUT ANY WARRANTY; without even the implied warranty of        ;
  13 ;   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         ;
  14 ;   GNU General Public License for more details.                          ;
  15 ;                                                                         ;
  16 ;   You should have received a copy of the GNU General Public License     ;
  17 ;   along with this program; if not, write to the                         ;
  18 ;   Free Software Foundation, Inc.,                                       ;
  19 ;   51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA              ;
  20 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  21
  22 (defun filter-adrinfo-according-to-hints (addrinfo hint-family
  23                                           hint-type hint-protocol)
  24   (labels ((addrinfo-good-p (addr)
  25              (and (or (zerop hint-family) (eql hint-family (slot addr 'et::family)))
  26                   (or (zerop hint-type) (eql hint-type (slot addr 'et::type)))
  27                   (eql hint-protocol (slot addr 'et::protocol))))
  28
  29            (filter-addrinfo-recursive (addr list)
  30              (if (sb-alien::null-alien addr)
  31                  (nreverse list)
  32                  (filter-addrinfo-recursive
  33                   (slot addr 'et::next)
  34                   (if (addrinfo-good-p addr)
  35                       (cons addr list)
  36                       list)))))
  37
  38     (filter-addrinfo-recursive addrinfo nil)))