1  /* Test hton/ntoh functions.
       2     Copyright (C) 1997-2023 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  }