string/test-endian-types.c

   1 /* Test endian.h endian-conversion macros always return the correct type.
   2    Copyright (C) 2017-2023 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 <stdint.h>
  21
  22 int i;
  23 uint16_t u16;
  24 uint32_t u32;
  25 uint64_t u64;
  26
  27 int
  28 do_test (void)
  29 {
  30   /* This is a compilation test.  */
  31   extern __typeof (htobe16 (i)) u16;
  32   extern __typeof (htole16 (i)) u16;
  33   extern __typeof (be16toh (i)) u16;
  34   extern __typeof (le16toh (i)) u16;
  35   extern __typeof (htobe32 (i)) u32;
  36   extern __typeof (htole32 (i)) u32;
  37   extern __typeof (be32toh (i)) u32;
  38   extern __typeof (le32toh (i)) u32;
  39   extern __typeof (htobe64 (i)) u64;
  40   extern __typeof (htole64 (i)) u64;
  41   extern __typeof (be64toh (i)) u64;
  42   extern __typeof (le64toh (i)) u64;
  43   (void) u16;
  44   (void) u32;
  45   (void) u64;
  46   return 0;
  47 }
  48
  49 #include <support/test-driver.c>