1  /* Copyright (C) 2000-2023 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     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <byteswap.h>
      19  #include <stdio.h>
      20  
      21  extern unsigned long long int wash (unsigned long long int a);
      22  
      23  int
      24  do_test (void)
      25  {
      26    int result = 0;
      27  
      28    /* Test the functions with constant arguments.  */
      29    if (bswap_16 (0x1234) != 0x3412)
      30      {
      31        puts ("bswap_16 (constant) flunked");
      32        result = 1;
      33      }
      34    if (bswap_32 (0x12345678) != 0x78563412)
      35      {
      36        puts ("bswap_32 (constant) flunked");
      37        result = 1;
      38      }
      39    if (bswap_64 (0x1234567890abcdefULL) != 0xefcdab9078563412ULL)
      40      {
      41        puts ("bswap_64 (constant) flunked");
      42        result = 1;
      43      }
      44  
      45    /* Test the functions with non-constant arguments.  */
      46    if (bswap_16 (wash (0x1234)) != 0x3412)
      47      {
      48        puts ("bswap_16 (non-constant) flunked");
      49        result = 1;
      50      }
      51    if (bswap_32 (wash (0x12345678)) != 0x78563412)
      52      {
      53        puts ("bswap_32 (non-constant) flunked");
      54        result = 1;
      55      }
      56    if (bswap_64 (wash (0x1234567890abcdefULL)) != 0xefcdab9078563412ULL)
      57      {
      58        puts ("bswap_64 (non-constant) flunked");
      59        result = 1;
      60      }
      61  
      62    return result;
      63  }
      64  
      65  
      66  unsigned long long int
      67  wash (unsigned long long int a)
      68  {
      69    /* Do nothing.  This function simply exists to avoid that the compiler
      70       regards the argument to the bswap_*() functions as constant.  */
      71    return a + 0;
      72  }
      73  
      74  #include <support/test-driver.c>