tests/test-btowc.c

   1 /* Test of conversion of unibyte character to wide character.
   2    Copyright (C) 2008-2024 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>, 2008.  */
  18
  19 #include <config.h>
  20
  21 #include <wchar.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (btowc, wint_t, (int));
  25
  26 #include <locale.h>
  27 #include <stdio.h>
  28
  29 #include "macros.h"
  30
  31 int
  32 main (int argc, char *argv[])
  33 {
  34   int c;
  35
  36   /* configure should already have checked that the locale is supported.  */
  37   if (setlocale (LC_ALL, "") == NULL)
  38     return 1;
  39
  40   ASSERT (btowc (EOF) == WEOF);
  41
  42 #ifdef __ANDROID__
  43   /* On Android ≥ 5.0, the default locale is the "C.UTF-8" locale, not the
  44      "C" locale.  Furthermore, when you attempt to set the "C" or "POSIX"
  45      locale via setlocale(), what you get is a "C" locale with UTF-8 encoding,
  46      that is, effectively the "C.UTF-8" locale.  */
  47   if (argc > 1 && strcmp (argv[1], "1") == 0 && MB_CUR_MAX > 1)
  48     argv[1] = "3";
  49 #endif
  50
  51   if (argc > 1)
  52     switch (argv[1][0])
  53       {
  54       case '1':
  55         /* C or POSIX locale.  */
  56         for (c = 0; c < 0x100; c++)
  57           if (c != 0)
  58             {
  59               /* We are testing all nonnull bytes.  */
  60               wint_t wc = btowc (c);
  61               /* POSIX:2018 says: "In the POSIX locale, btowc() shall not return
  62                  WEOF if c has a value in the range 0 to 255 inclusive."  */
  63               if (c < 0x80)
  64                 /* c is an ASCII character.  */
  65                 ASSERT (wc == c);
  66               else
  67                 /* On most platforms, the bytes 0x80..0xFF map to U+0080..U+00FF.
  68                    But on musl libc, the bytes 0x80..0xFF map to U+DF80..U+DFFF.  */
  69                 ASSERT (wc == c || wc == 0xDF00 + c);
  70             }
  71         return test_exit_status;
  72
  73       case '2':
  74         /* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
  75         for (c = 0; c < 0x80; c++)
  76           ASSERT (btowc (c) == c);
  77         for (c = 0xA0; c < 0x100; c++)
  78           ASSERT (btowc (c) != WEOF);
  79         return test_exit_status;
  80
  81       case '3':
  82         /* Locale encoding is UTF-8.  */
  83         for (c = 0; c < 0x80; c++)
  84           ASSERT (btowc (c) == c);
  85         for (c = 0x80; c < 0x100; c++)
  86           ASSERT (btowc (c) == WEOF);
  87         return test_exit_status;
  88       }
  89
  90   return 1;
  91 }