libc/socket/inet_aton.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2010  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 int inet_aton (const char *cp, struct in_addr *inp)
  26 {
  27         unsigned *ip = (unsigned *) inp;
  28
  29         if (!*ip)
  30                 return 0;
  31
  32         unsigned char a = (unsigned char) *ip;
  33         unsigned char b = (unsigned char) (*ip >> 8);
  34         unsigned char c = (unsigned char) (*ip >> 16);
  35         unsigned char d = (unsigned char) (*ip >> 24);
  36
  37         sprintf ((char *) cp, "%d.%d.%d.%d", a, b, c, d);
  38
  39         return 1;
  40 }