c32to-impl.h

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Hash : d4eb619a
Author :
Date : 2024-06-09T19:16:01

c32rtomb: Add a sanity check, working around Solaris 11 OmniOS.

* m4/c32rtomb.m4 (gl_CHECK_FUNC_C32RTOMB): New macro, extracted from
gl_FUNC_C32RTOMB.
(gl_C32RTOMB_SANITYCHECK): New macro.
(gl_FUNC_C32RTOMB): Require gl_CHECK_FUNC_C32RTOMB and
gl_C32RTOMB_SANITYCHECK. If HAVE_WORKING_C32RTOMB is 0, set
REPLACE_C32RTOMB.
* lib/c32rtomb.c (c32rtomb): Together with HAVE_WORKING_MBRTOC32, test
also HAVE_WORKING_C32RTOMB.

* m4/mbrtoc32.m4 (gl_PREREQ_MBRTOC32): Require gl_C32RTOMB_SANITYCHECK.
* lib/mbrtoc32.c (mbrtoc32): Together with HAVE_WORKING_MBRTOC32, test
also HAVE_WORKING_C32RTOMB.
* modules/mbrtoc32 (Files): Add m4/c32rtomb.m4.

* lib/btoc32.c (btoc32): Together with HAVE_WORKING_MBRTOC32, test also
HAVE_WORKING_C32RTOMB.

* lib/mbsrtoc32s.c: Together with HAVE_WORKING_MBRTOC32, test also
HAVE_WORKING_C32RTOMB.

* lib/mbsnrtoc32s.c: Together with HAVE_WORKING_MBRTOC32, test also
HAVE_WORKING_C32RTOMB.

* lib/c32tob.c (c32tob): Together with HAVE_WORKING_MBRTOC32, test also
HAVE_WORKING_C32RTOMB.
* modules/c32tob (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.

* lib/c32srtombs.c: Together with HAVE_WORKING_MBRTOC32, test also
HAVE_WORKING_C32RTOMB.

* lib/c32snrtombs.c: Together with HAVE_WORKING_MBRTOC32, test also
HAVE_WORKING_C32RTOMB.

* lib/c32is-impl.h (FUNC): Together with HAVE_WORKING_MBRTOC32, test
also HAVE_WORKING_C32RTOMB.
* modules/c32isalnum (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32isalpha (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32isblank (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32iscntrl (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32isdigit (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32isgraph (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32islower (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32isprint (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32ispunct (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32isspace (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32isupper (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32isxdigit (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.

* lib/c32to-impl.h (FUNC): Together with HAVE_WORKING_MBRTOC32, test
also HAVE_WORKING_C32RTOMB.
* modules/c32tolower (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.
* modules/c32toupper (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.

* lib/c32width.c (c32width): Together with HAVE_WORKING_MBRTOC32, test
also HAVE_WORKING_C32RTOMB.
* modules/c32width (Files): Add m4/c32rtomb.m4.
(configure.ac): Require gl_C32RTOMB_SANITYCHECK.

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lib/c32to-impl.h

/* Case mapping of a 32-bit wide character.
   Copyright (C) 2020-2024 Free Software Foundation, Inc.

   This file is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   This file is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2023.  */

#include <wchar.h>
#include <wctype.h>

#if GNULIB_defined_mbstate_t
# include "localcharset.h"
# include "streq.h"
#endif

#if GL_CHAR32_T_IS_UNICODE
# include "lc-charset-unicode.h"
#endif

#include "unicase.h"

#if _GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t
_GL_EXTERN_INLINE
#endif
wint_t
FUNC (wint_t wc)
{
  /* The char32_t encoding of a multibyte character is defined by the way
     mbrtoc32() is defined.  */

#if GNULIB_defined_mbstate_t            /* AIX, IRIX */
  /* mbrtoc32() is defined on top of mbtowc() for the non-UTF-8 locales
     and directly for the UTF-8 locales.  */
  if (wc != WEOF)
    {
      const char *encoding = locale_charset ();
      if (STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0))
        return UCS_FUNC (wc);
      else
        return WCHAR_FUNC (wc);
    }
  else
    return wc;

#elif HAVE_WORKING_MBRTOC32 && HAVE_WORKING_C32RTOMB /* glibc, Android */
  /* mbrtoc32() is essentially defined by the system libc.  */

# if _GL_WCHAR_T_IS_UCS4
  /* The char32_t encoding of a multibyte character is known to be the same as
     the wchar_t encoding.  */
  return WCHAR_FUNC (wc);
# else
  /* The char32_t encoding of a multibyte character is known to be UCS-4,
     different from the wchar_t encoding.  */
  if (wc != WEOF)
    return UCS_FUNC (wc);
  else
    return wc;
# endif

#elif _GL_SMALL_WCHAR_T                 /* Cygwin, mingw, MSVC */
  /* The wchar_t encoding is UTF-16.
     The char32_t encoding is UCS-4.  */

  if (wc == WEOF || wc == (wchar_t) wc)
    /* wc is in the range for the tow* functions.  */
    return WCHAR_FUNC (wc);
  else
    return UCS_FUNC (wc);

#else /* macOS, FreeBSD, NetBSD, OpenBSD, HP-UX, Solaris, Minix, Android */
  /* char32_t and wchar_t are equivalent.  */
  static_assert (sizeof (char32_t) == sizeof (wchar_t));

# if GL_CHAR32_T_IS_UNICODE && GL_CHAR32_T_VS_WCHAR_T_NEEDS_CONVERSION
  return UCS_FUNC (wc);
# else
  return WCHAR_FUNC (wc);
# endif
#endif
}

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