inet/htonl.c

   1 /* Copyright (C) 1993-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdint.h>
  19 #include <netinet/in.h>
  20
  21 #undef  htonl
  22 #undef  ntohl
  23
  24 uint32_t
  25 htonl (uint32_t x)
  26 {
  27 #if BYTE_ORDER == BIG_ENDIAN
  28   return x;
  29 #elif BYTE_ORDER == LITTLE_ENDIAN
  30   return __bswap_32 (x);
  31 #else
  32 # error "What kind of system is this?"
  33 #endif
  34 }
  35 weak_alias (htonl, ntohl)