libc/socket/inet_ntoa.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 <stdio.h>
  21 #include <string.h>
  22 #include <arpa/inet.h>
  23 #include <netinet/in.h>
  24
  25 static char tmp_addr[16];
  26
  27 char *inet_ntoa (struct in_addr in)
  28 {
  29         unsigned *ip = (unsigned *) &in;
  30
  31         unsigned char a = (unsigned char) *ip;
  32         unsigned char b = (unsigned char) (*ip >> 8);
  33         unsigned char c = (unsigned char) (*ip >> 16);
  34         unsigned char d = (unsigned char) (*ip >> 24);
  35
  36         sprintf (tmp_addr, "%d.%d.%d.%d", a, b, c, d);
  37
  38         return tmp_addr;
  39 }