tests/test-btoc32.c

   1 /* Test of conversion of unibyte character to 32-bit 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 <uchar.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (btoc32, wint_t, (int));
  25
  26 #include <locale.h>
  27 #include <stdio.h>
  28 #include <wchar.h>
  29
  30 #include "macros.h"
  31
  32 int
  33 main (int argc, char *argv[])
  34 {
  35   int c;
  36
  37   /* configure should already have checked that the locale is supported.  */
  38   if (setlocale (LC_ALL, "") == NULL)
  39     return 1;
  40
  41   ASSERT (btoc32 (EOF) == WEOF);
  42
  43 #ifdef __ANDROID__
  44   /* On Android ≥ 5.0, the default locale is the "C.UTF-8" locale, not the
  45      "C" locale.  Furthermore, when you attempt to set the "C" or "POSIX"
  46      locale via setlocale(), what you get is a "C" locale with UTF-8 encoding,
  47      that is, effectively the "C.UTF-8" locale.  */
  48   if (argc > 1 && strcmp (argv[1], "1") == 0 && MB_CUR_MAX > 1)
  49     argv[1] = "3";
  50 #endif
  51
  52   if (argc > 1)
  53     switch (argv[1][0])
  54       {
  55       case '1':
  56         /* C or POSIX locale.  */
  57         for (c = 0; c < 0x100; c++)
  58           if (c != 0)
  59             {
  60               /* We are testing all nonnull bytes.  */
  61               wint_t wc = btoc32 (c);
  62               /* POSIX:2018 says regarding btowc: "In the POSIX locale, btowc()
  63                  shall not return WEOF if c has a value in the range 0 to 255
  64                  inclusive."  It is reasonable to expect btoc32 to behave in
  65                  the same way.  */
  66               if (c < 0x80)
  67                 /* c is an ASCII character.  */
  68                 ASSERT (wc == c);
  69               else
  70                 /* On most platforms, the bytes 0x80..0xFF map to U+0080..U+00FF.
  71                    But on musl libc, the bytes 0x80..0xFF map to U+DF80..U+DFFF.  */
  72                 ASSERT (wc == c || wc == 0xDF00 + c);
  73             }
  74         return test_exit_status;
  75
  76       case '2':
  77         /* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
  78         for (c = 0; c < 0x80; c++)
  79           ASSERT (btoc32 (c) == c);
  80         for (c = 0xA0; c < 0x100; c++)
  81           ASSERT (btoc32 (c) != WEOF);
  82         return test_exit_status;
  83
  84       case '3':
  85         /* Locale encoding is UTF-8.  */
  86         for (c = 0; c < 0x80; c++)
  87           ASSERT (btoc32 (c) == c);
  88         for (c = 0x80; c < 0x100; c++)
  89           ASSERT (btoc32 (c) == WEOF);
  90         return test_exit_status;
  91       }
  92
  93   return 1;
  94 }