inet/htontest.c

   1 /* Test hton/ntoh functions.
   2    Copyright (C) 1997-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <endian.h>
  20 #include <stdio.h>
  21 #include <sys/types.h>
  22 #include <netinet/in.h>
  23
  24 #if BYTE_ORDER == BIG_ENDIAN
  25 # define TEST(orig, swapped, fct) \
  26   if ((fct (orig)) != (orig)) {                                               \
  27     printf ("Failed for %s -> %#x\n", #fct "(" #orig ")", fct (orig));        \
  28     result = 1;                                                               \
  29   }
  30 #elif BYTE_ORDER == LITTLE_ENDIAN
  31 # define TEST(orig, swapped, fct) \
  32   if ((fct (orig)) != (swapped)) {                                            \
  33     printf ("Failed for %s -> %#x\n", #fct "(" #orig ")", fct (orig));        \
  34     result = 1;                                                               \
  35   }
  36 #else
  37 # error "Bah, what kind of system do you use?"
  38 #endif
  39
  40 uint32_t lo = 0x67452301;
  41 uint16_t foo = 0x1234;
  42
  43 int
  44 main (void)
  45 {
  46   int result = 0;
  47
  48   TEST (0x67452301, 0x01234567, htonl);
  49   TEST (0x67452301, 0x01234567, (htonl));
  50   TEST (0x67452301, 0x01234567, ntohl);
  51   TEST (0x67452301, 0x01234567, (ntohl));
  52
  53   TEST (lo, 0x01234567, htonl);
  54   TEST (lo, 0x01234567, (htonl));
  55   TEST (lo, 0x01234567, ntohl);
  56   TEST (lo, 0x01234567, (ntohl));
  57
  58   TEST (0x1234, 0x3412, htons);
  59   TEST (0x1234, 0x3412, (htons));
  60   TEST (0x1234, 0x3412, ntohs);
  61   TEST (0x1234, 0x3412, (ntohs));
  62
  63   TEST (foo, 0x3412, htons);
  64   TEST (foo, 0x3412, (htons));
  65   TEST (foo, 0x3412, ntohs);
  66   TEST (foo, 0x3412, (ntohs));
  67
  68   return result;
  69 }