libc/inet/ntohl.c

   1 /*
   2  * Functions to convert between host and network byte order.
   3  *
   4  * Copyright (C) 2003-2006 by Erik Andersen <andersen@uclibc.org>
   5  *
   6  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   7  */
   8
   9 #include <netinet/in.h>
  10
  11 #undef ntohl
  12 #undef ntohs
  13 #undef htonl
  14 #undef htons
  15
  16 #if __BYTE_ORDER != __BIG_ENDIAN && __BYTE_ORDER != __LITTLE_ENDIAN
  17 # error "You seem to have an unsupported byteorder"
  18 #endif
  19
  20 uint32_t ntohl (uint32_t x)
  21 {
  22 #if __BYTE_ORDER == __BIG_ENDIAN
  23         return x;
  24 #else
  25         return __bswap_32(x);
  26 #endif
  27 }
  28 libc_hidden_def(ntohl)
  29 strong_alias(ntohl,htonl)
  30 libc_hidden_def(htonl)
  31
  32 uint16_t ntohs (uint16_t x)
  33 {
  34 #if __BYTE_ORDER == __BIG_ENDIAN
  35         return x;
  36 #else
  37         return __bswap_16(x);
  38 #endif
  39 }
  40 libc_hidden_def(ntohs)
  41 strong_alias(ntohs,htons)
  42 libc_hidden_def(htons)