inet/htontest.c

   1 /* Test hton/ntoh functions.
   2    Copyright (C) 1997-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <endian.h>
  21 #include <stdio.h>
  22 #include <sys/types.h>
  23 #include <netinet/in.h>
  24
  25 #if BYTE_ORDER == BIG_ENDIAN
  26 # define TEST(orig, swapped, fct) \
  27   if ((fct (orig)) != (orig)) {                                               \
  28     printf ("Failed for %s -> %#x\n", #fct "(" #orig ")", fct (orig));        \
  29     result = 1;                                                               \
  30   }
  31 #elif BYTE_ORDER == LITTLE_ENDIAN
  32 # define TEST(orig, swapped, fct) \
  33   if ((fct (orig)) != (swapped)) {                                            \
  34     printf ("Failed for %s -> %#x\n", #fct "(" #orig ")", fct (orig));        \
  35     result = 1;                                                               \
  36   }
  37 #else
  38 # error "Bah, what kind of system do you use?"
  39 #endif
  40
  41 uint32_t lo = 0x67452301;
  42 uint16_t foo = 0x1234;
  43
  44 int
  45 main (void)
  46 {
  47   int result = 0;
  48
  49   TEST (0x67452301, 0x01234567, htonl);
  50   TEST (0x67452301, 0x01234567, (htonl));
  51   TEST (0x67452301, 0x01234567, ntohl);
  52   TEST (0x67452301, 0x01234567, (ntohl));
  53
  54   TEST (lo, 0x01234567, htonl);
  55   TEST (lo, 0x01234567, (htonl));
  56   TEST (lo, 0x01234567, ntohl);
  57   TEST (lo, 0x01234567, (ntohl));
  58
  59   TEST (0x1234, 0x3412, htons);
  60   TEST (0x1234, 0x3412, (htons));
  61   TEST (0x1234, 0x3412, ntohs);
  62   TEST (0x1234, 0x3412, (ntohs));
  63
  64   TEST (foo, 0x3412, htons);
  65   TEST (foo, 0x3412, (htons));
  66   TEST (foo, 0x3412, ntohs);
  67   TEST (foo, 0x3412, (ntohs));
  68
  69   return result;
  70 }