tests/test-uchar.c

   1 /* Test of <uchar.h> substitute.
   2    Copyright (C) 2019-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
  18
  19 #include <config.h>
  20
  21 #include <uchar.h>
  22
  23 /* Check that the types are defined.  */
  24 mbstate_t a = { 0 };
  25 size_t b = 5;
  26 char8_t c = 'x';
  27 char16_t d = 'y';
  28 char32_t e = 'z';
  29
  30 /* Check that char8_t, char16_t, and char32_t are unsigned types.  */
  31 static_assert ((char8_t)(-1) >= 0);
  32 static_assert ((char16_t)(-1) >= 0);
  33 #if !defined __HP_cc
  34 static_assert ((char32_t)(-1) >= 0);
  35 #endif
  36
  37 /* Check that char8_t is at least 8 bits wide.  */
  38 static_assert ((char8_t)0xFF != (char8_t)0x7F);
  39
  40 /* Check that char16_t is at least 16 bits wide.  */
  41 static_assert ((char16_t)0xFFFF != (char16_t)0x7FFF);
  42
  43 /* Check that char32_t is at least 31 bits wide.  */
  44 static_assert ((char32_t)0x7FFFFFFF != (char32_t)0x3FFFFFFF);
  45
  46 /* Check that _GL_SMALL_WCHAR_T is correctly defined.  */
  47 #if _GL_SMALL_WCHAR_T
  48 static_assert (sizeof (wchar_t) < sizeof (char32_t));
  49 #else
  50 static_assert (sizeof (wchar_t) == sizeof (char32_t));
  51 #endif
  52
  53 int
  54 main (void)
  55 {
  56   return 0;
  57 }