string/test-endian-sign-conversion.c

   1 /* Test endian.h endian-conversion macros work with -Wsign-conversion.
   2    Copyright (C) 2018-2022 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 <stdint.h>
  21
  22 uint16_t u16;
  23 uint32_t u32;
  24 uint64_t u64;
  25
  26 static int
  27 do_test (void)
  28 {
  29   /* This is a compilation test.  */
  30   u16 = (htobe16 (u16));
  31   u16 = (htole16 (u16));
  32   u16 = (be16toh (u16));
  33   u16 = (le16toh (u16));
  34   u32 = (htobe32 (u32));
  35   u32 = (htole32 (u32));
  36   u32 = (be32toh (u32));
  37   u32 = (le32toh (u32));
  38   u64 = (htobe64 (u64));
  39   u64 = (htole64 (u64));
  40   u64 = (be64toh (u64));
  41   u64 = (le64toh (u64));
  42   (void) u16;
  43   (void) u32;
  44   (void) u64;
  45   return 0;
  46 }
  47
  48 #include <support/test-driver.c>