string/tst-bswap.c

   1 /* Copyright (C) 2000 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>.
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <byteswap.h>
  21 #include <stdio.h>
  22
  23 extern unsigned long long int wash (unsigned long long int a);
  24
  25 int
  26 main (void)
  27 {
  28   int result = 0;
  29
  30   /* Test the functions with constant arguments.  */
  31   if (bswap_16 (0x1234) != 0x3412)
  32     {
  33       puts ("bswap_16 (constant) flunked");
  34       result = 1;
  35     }
  36   if (bswap_32 (0x12345678) != 0x78563412)
  37     {
  38       puts ("bswap_32 (constant) flunked");
  39       result = 1;
  40     }
  41   if (bswap_64 (0x1234567890abcdefULL) != 0xefcdab9078563412ULL)
  42     {
  43       puts ("bswap_64 (constant) flunked");
  44       result = 1;
  45     }
  46
  47   /* Test the functions with non-constant arguments.  */
  48   if (bswap_16 (wash (0x1234)) != 0x3412)
  49     {
  50       puts ("bswap_16 (non-constant) flunked");
  51       result = 1;
  52     }
  53   if (bswap_32 (wash (0x12345678)) != 0x78563412)
  54     {
  55       puts ("bswap_32 (non-constant) flunked");
  56       result = 1;
  57     }
  58   if (bswap_64 (wash (0x1234567890abcdefULL)) != 0xefcdab9078563412ULL)
  59     {
  60       puts ("bswap_64 (non-constant) flunked");
  61       result = 1;
  62     }
  63
  64   return result;
  65 }
  66
  67
  68 unsigned long long int
  69 wash (unsigned long long int a)
  70 {
  71   /* Do nothing.  This function simply exists to avoid that the compiler
  72      regards the argument to the bswap_*() functions as constant.  */
  73   return a + 0;
  74 }