Back to index

glibc  2.9
htons.c
Go to the documentation of this file.
00001 /* Copyright (C) 1993,97,2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <netinet/in.h>
00020 
00021 #undef htons
00022 #undef ntohs
00023 
00024 uint16_t
00025 htons (x)
00026      uint16_t x;
00027 {
00028 #if BYTE_ORDER == BIG_ENDIAN
00029   return x;
00030 #elif BYTE_ORDER == LITTLE_ENDIAN
00031   return __bswap_16 (x);
00032 #else
00033 # error "What kind of system is this?"
00034 #endif
00035 }
00036 weak_alias (htons, ntohs)