libc/sys/select.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <sys/select.h>
  21 #include <sys/time.h>
  22 #include <errno.h>
  23
  24 void _fd_zero (fd_set *set)
  25 {
  26         set->count = 0;
  27 }
  28
  29 int _fd_isset (int fd, fd_set *set)
  30 {
  31         unsigned int i;
  32
  33         for (i = 0; i < set->count; i ++)
  34                 if (set->fd[i] == fd)
  35                         return 1;
  36
  37         return 0;
  38 }
  39
  40 void _fd_set (int fd, fd_set *set)
  41 {
  42         if (set->count < FD_SETSIZE)
  43                 set->fd[set->count ++] = fd;
  44 }
  45
  46 void _fd_clr (int fd, fd_set *set)
  47 {
  48         unsigned int i;
  49
  50         for (i = 0; i < set->count ; i++) {
  51                 if (set->fd[i] == fd) {
  52                         while (i < set->count - 1) {
  53                                 set->fd[i] = set->fd[i + 1];
  54                                 i ++;
  55                         }
  56
  57                         set->count --;
  58                         break;
  59                 }
  60         }
  61 }
  62
  63 int select (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, const struct timeval *timeout)
  64 {
  65         /*TODO */
  66
  67         return -1;
  68 }