00001 // Copyright 2006 Benedikt Böhm <hollow@gentoo.org> 00002 // 00003 // This program is free software; you can redistribute it and/or modify 00004 // it under the terms of the GNU General Public License as published by 00005 // the Free Software Foundation; either version 2 of the License, or 00006 // (at your option) any later version. 00007 // 00008 // This program is distributed in the hope that it will be useful, 00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00011 // GNU General Public License for more details. 00012 // 00013 // You should have received a copy of the GNU General Public License 00014 // along with this program; if not, write to the 00015 // Free Software Foundation, Inc., 00016 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00017 00018 #include "addr.h" 00019 00020 static inline 00021 int islitend(void) { 00022 int i = 0; 00023 ((char *)(&i))[0] = 1; 00024 return i == 1; 00025 } 00026 00027 uint32_t addr_hton(uint32_t addr) 00028 { 00029 if (islitend()) 00030 return (addr >> 24) | 00031 ((addr & 0xff0000) >> 8) | 00032 ((addr & 0xff00 ) << 8) | 00033 (addr << 24); 00034 else 00035 return addr; 00036 }