path: root/gl/uchar.h

/* DO NOT EDIT! GENERATED AUTOMATICALLY! */
/* <uchar.h> substitute - 16-bit and 32-bit wide character types.
   Copyright (C) 2019-2025 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>, 2019.  */

/*
 * ISO C 23 <uchar.h> for platforms that lack it.
 */

#ifndef _GL_UCHAR_H

#if __GNUC__ >= 3
#pragma GCC system_header
#endif


/* The include_next requires a split double-inclusion guard.  */
#if (defined __cplusplus ? 0 : 1)
# if defined __HAIKU__
/* Work around <https://dev.haiku-os.org/ticket/17040>.  */
#  include <stdint.h>
# endif
/* On AIX 7.2 with xlclang++, /usr/include/uchar.h produces compilation errors
   because it contains typedef definitions of char16_t and char32_t, however
   char16_t and char32_t are keywords in this situation.  To work around it,
   define char16_t and char32_t as macros.  */
# if defined __cplusplus && defined _AIX && defined __ibmxl__ && defined __clang__
#  define char16_t gl_char16_t
#  define char32_t gl_char32_t
# endif
# include_next <uchar.h>
#endif

#ifndef _GL_UCHAR_H
#define _GL_UCHAR_H

/* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE, _GL_BEGIN_C_LINKAGE,
   _GL_ATTRIBUTE_PURE, GNULIB_POSIXCHECK, HAVE_RAW_DECL_*.  */
#if !_GL_CONFIG_H_INCLUDED
 #error "Please include config.h first."
#endif

/* Get uint_least16_t, uint_least32_t.  */
#include <stdint.h>

/* Get mbstate_t, size_t.  */
#include <wchar.h>

/* For the inline functions.  */
#include <string.h>
#include <wctype.h>

/* The __attribute__ feature is available in gcc versions 2.5 and later.
   The attribute __pure__ was added in gcc 2.96.  */
#ifndef _GL_ATTRIBUTE_PURE
# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
# else
#  define _GL_ATTRIBUTE_PURE /* empty */
# endif
#endif

/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
/* C++ compatible function declaration macros.
   Copyright (C) 2010-2025 Free Software Foundation, Inc.

   This program 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 of the License, or
   (at your option) any later version.

   This program 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/>.  */

#ifndef _GL_CXXDEFS_H
#define _GL_CXXDEFS_H

/* Begin/end the GNULIB_NAMESPACE namespace.  */
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_BEGIN_NAMESPACE namespace GNULIB_NAMESPACE {
# define _GL_END_NAMESPACE }
#else
# define _GL_BEGIN_NAMESPACE
# define _GL_END_NAMESPACE
#endif

/* The three most frequent use cases of these macros are:

   * For providing a substitute for a function that is missing on some
     platforms, but is declared and works fine on the platforms on which
     it exists:

       #if @GNULIB_FOO@
       # if !@HAVE_FOO@
       _GL_FUNCDECL_SYS (foo, ...);
       # endif
       _GL_CXXALIAS_SYS (foo, ...);
       _GL_CXXALIASWARN (foo);
       #elif defined GNULIB_POSIXCHECK
       ...
       #endif

   * For providing a replacement for a function that exists on all platforms,
     but is broken/insufficient and needs to be replaced on some platforms:

       #if @GNULIB_FOO@
       # if @REPLACE_FOO@
       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
       #   undef foo
       #   define foo rpl_foo
       #  endif
       _GL_FUNCDECL_RPL (foo, ...);
       _GL_CXXALIAS_RPL (foo, ...);
       # else
       _GL_CXXALIAS_SYS (foo, ...);
       # endif
       _GL_CXXALIASWARN (foo);
       #elif defined GNULIB_POSIXCHECK
       ...
       #endif

   * For providing a replacement for a function that exists on some platforms
     but is broken/insufficient and needs to be replaced on some of them and
     is additionally either missing or undeclared on some other platforms:

       #if @GNULIB_FOO@
       # if @REPLACE_FOO@
       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
       #   undef foo
       #   define foo rpl_foo
       #  endif
       _GL_FUNCDECL_RPL (foo, ...);
       _GL_CXXALIAS_RPL (foo, ...);
       # else
       #  if !@HAVE_FOO@   or   if !@HAVE_DECL_FOO@
       _GL_FUNCDECL_SYS (foo, ...);
       #  endif
       _GL_CXXALIAS_SYS (foo, ...);
       # endif
       _GL_CXXALIASWARN (foo);
       #elif defined GNULIB_POSIXCHECK
       ...
       #endif
*/

/* _GL_EXTERN_C declaration;
   performs the declaration with C linkage.  */
#if defined __cplusplus
# define _GL_EXTERN_C extern "C"
#else
# define _GL_EXTERN_C extern
#endif

/* _GL_EXTERN_C_FUNC declaration;
   performs the declaration of a function with C linkage.  */
#if defined __cplusplus
# define _GL_EXTERN_C_FUNC extern "C"
#else
/* In C mode, omit the 'extern' keyword, because attributes in bracket syntax
   are not allowed between 'extern' and the return type (see gnulib-common.m4).
 */
# define _GL_EXTERN_C_FUNC
#endif

/* _GL_FUNCDECL_RPL (func, rettype, parameters, [attributes]);
   declares a replacement function, named rpl_func, with the given prototype,
   consisting of return type, parameters, and attributes.
   Although attributes are optional, the comma before them is required
   for portability to C17 and earlier.  The attribute _GL_ATTRIBUTE_NOTHROW,
   if needed, must be placed after the _GL_FUNCDECL_RPL invocation,
   at the end of the declaration.
   Examples:
     _GL_FUNCDECL_RPL (free, void, (void *ptr), ) _GL_ATTRIBUTE_NOTHROW;
     _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...),
                                  _GL_ARG_NONNULL ((1)));

   Note: Attributes, such as _GL_ATTRIBUTE_DEPRECATED, are supported in front
   of a _GL_FUNCDECL_RPL invocation only in C mode, not in C++ mode.  (That's
   because
     [[...]] extern "C" <declaration>;
   is invalid syntax in C++.)
 */
#define _GL_FUNCDECL_RPL(func,rettype,parameters,...) \
  _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters, __VA_ARGS__)
#define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters,...) \
  _GL_EXTERN_C_FUNC __VA_ARGS__ rettype rpl_func parameters

/* _GL_FUNCDECL_SYS_NAME (func) expands to plain func if C++, and to
   parenthesized func otherwise.  Parenthesization is needed in C23 if
   the function is like strchr and so is a qualifier-generic macro
   that expands to something more complicated.  */
#ifdef __cplusplus
# define _GL_FUNCDECL_SYS_NAME(func) func
#else
# define _GL_FUNCDECL_SYS_NAME(func) (func)
#endif

/* _GL_FUNCDECL_SYS (func, rettype, parameters, [attributes]);
   declares the system function, named func, with the given prototype,
   consisting of return type, parameters, and attributes.
   Although attributes are optional, the comma before them is required
   for portability to C17 and earlier.  The attribute _GL_ATTRIBUTE_NOTHROW,
   if needed, must be placed after the _GL_FUNCDECL_RPL invocation,
   at the end of the declaration.
   Examples:
     _GL_FUNCDECL_SYS (getumask, mode_t, (void), ) _GL_ATTRIBUTE_NOTHROW;
     _GL_FUNCDECL_SYS (posix_openpt, int, (int flags), _GL_ATTRIBUTE_NODISCARD);
 */
#define _GL_FUNCDECL_SYS(func,rettype,parameters,...) \
  _GL_EXTERN_C_FUNC __VA_ARGS__ rettype _GL_FUNCDECL_SYS_NAME (func) parameters

/* _GL_CXXALIAS_RPL (func, rettype, parameters);
   declares a C++ alias called GNULIB_NAMESPACE::func
   that redirects to rpl_func, if GNULIB_NAMESPACE is defined.
   Example:
     _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));

   Wrapping rpl_func in an object with an inline conversion operator
   avoids a reference to rpl_func unless GNULIB_NAMESPACE::func is
   actually used in the program.  */
#define _GL_CXXALIAS_RPL(func,rettype,parameters) \
  _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
    namespace GNULIB_NAMESPACE                                \
    {                                                         \
      static const struct _gl_ ## func ## _wrapper            \
      {                                                       \
        typedef rettype (*type) parameters;                   \
                                                              \
        inline operator type () const                         \
        {                                                     \
          return ::rpl_func;                                  \
        }                                                     \
      } func = {};                                            \
    }                                                         \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#else
# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#endif

/* _GL_CXXALIAS_MDA (func, rettype, parameters);
   is to be used when func is a Microsoft deprecated alias, on native Windows.
   It declares a C++ alias called GNULIB_NAMESPACE::func
   that redirects to _func, if GNULIB_NAMESPACE is defined.
   Example:
     _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
 */
#define _GL_CXXALIAS_MDA(func,rettype,parameters) \
  _GL_CXXALIAS_RPL_1 (func, _##func, rettype, parameters)

/* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters);
   is like  _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters);
   except that the C function rpl_func may have a slightly different
   declaration.  A cast is used to silence the "invalid conversion" error
   that would otherwise occur.  */
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
    namespace GNULIB_NAMESPACE                                     \
    {                                                              \
      static const struct _gl_ ## func ## _wrapper                 \
      {                                                            \
        typedef rettype (*type) parameters;                        \
                                                                   \
        inline operator type () const                              \
        {                                                          \
          return reinterpret_cast<type>(::rpl_func);               \
        }                                                          \
      } func = {};                                                 \
    }                                                              \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#else
# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#endif

/* _GL_CXXALIAS_MDA_CAST (func, rettype, parameters);
   is like  _GL_CXXALIAS_MDA (func, rettype, parameters);
   except that the C function func may have a slightly different declaration.
   A cast is used to silence the "invalid conversion" error that would
   otherwise occur.  */
#define _GL_CXXALIAS_MDA_CAST(func,rettype,parameters) \
  _GL_CXXALIAS_RPL_CAST_1 (func, _##func, rettype, parameters)

/* _GL_CXXALIAS_SYS (func, rettype, parameters);
   declares a C++ alias called GNULIB_NAMESPACE::func
   that redirects to the system provided function func, if GNULIB_NAMESPACE
   is defined.
   Example:
     _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));

   Wrapping func in an object with an inline conversion operator
   avoids a reference to func unless GNULIB_NAMESPACE::func is
   actually used in the program.  */
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_CXXALIAS_SYS(func,rettype,parameters)            \
    namespace GNULIB_NAMESPACE                                \
    {                                                         \
      static const struct _gl_ ## func ## _wrapper            \
      {                                                       \
        typedef rettype (*type) parameters;                   \
                                                              \
        inline operator type () const                         \
        {                                                     \
          return ::func;                                      \
        }                                                     \
      } func = {};                                            \
    }                                                         \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#else
# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#endif

/* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters);
   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
   except that the C function func may have a slightly different declaration.
   A cast is used to silence the "invalid conversion" error that would
   otherwise occur.  */
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
    namespace GNULIB_NAMESPACE                          \
    {                                                   \
      static const struct _gl_ ## func ## _wrapper      \
      {                                                 \
        typedef rettype (*type) parameters;             \
                                                        \
        inline operator type () const                   \
        {                                               \
          return reinterpret_cast<type>(::func);        \
        }                                               \
      } func = {};                                      \
    }                                                   \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#else
# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#endif

/* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2);
   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
   except that the C function is picked among a set of overloaded functions,
   namely the one with rettype2 and parameters2.  Two consecutive casts
   are used to silence the "cannot find a match" and "invalid conversion"
   errors that would otherwise occur.  */
#if defined __cplusplus && defined GNULIB_NAMESPACE
  /* The outer cast must be a reinterpret_cast.
     The inner cast: When the function is defined as a set of overloaded
     functions, it works as a static_cast<>, choosing the designated variant.
     When the function is defined as a single variant, it works as a
     reinterpret_cast<>. The parenthesized cast syntax works both ways.  */
# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
    namespace GNULIB_NAMESPACE                                                \
    {                                                                         \
      static const struct _gl_ ## func ## _wrapper                            \
      {                                                                       \
        typedef rettype (*type) parameters;                                   \
                                                                              \
        inline operator type () const                                         \
        {                                                                     \
          return reinterpret_cast<type>((rettype2 (*) parameters2)(::func));  \
        }                                                                     \
      } func = {};                                                            \
    }                                                                         \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#else
# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#endif

/* _GL_CXXALIASWARN (func);
   causes a warning to be emitted when ::func is used but not when
   GNULIB_NAMESPACE::func is used.  func must be defined without overloaded
   variants.  */
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_CXXALIASWARN(func) \
   _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE)
# define _GL_CXXALIASWARN_1(func,namespace) \
   _GL_CXXALIASWARN_2 (func, namespace)
/* To work around GCC bug <https://gcc.gnu.org/PR43881>,
   we enable the warning only when not optimizing.  */
# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
#  define _GL_CXXALIASWARN_2(func,namespace) \
    _GL_WARN_ON_USE (func, \
                     "The symbol ::" #func " refers to the system function. " \
                     "Use " #namespace "::" #func " instead.")
# elif (__GNUC__ >= 3 || defined __clang__) && GNULIB_STRICT_CHECKING
#  define _GL_CXXALIASWARN_2(func,namespace) \
     extern __typeof__ (func) func
# else
#  define _GL_CXXALIASWARN_2(func,namespace) \
     _GL_EXTERN_C int _gl_cxxalias_dummy
# endif
#else
# define _GL_CXXALIASWARN(func) \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#endif

/* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes);
   causes a warning to be emitted when the given overloaded variant of ::func
   is used but not when GNULIB_NAMESPACE::func is used.  */
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
   _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \
                        GNULIB_NAMESPACE)
# define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \
   _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace)
/* To work around GCC bug <https://gcc.gnu.org/PR43881>,
   we enable the warning only when not optimizing.  */
# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
    _GL_WARN_ON_USE_CXX (func, rettype, rettype, parameters_and_attributes, \
                         "The symbol ::" #func " refers to the system function. " \
                         "Use " #namespace "::" #func " instead.")
# else
#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
     _GL_EXTERN_C int _gl_cxxalias_dummy
# endif
#else
# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
    _GL_EXTERN_C int _gl_cxxalias_dummy
#endif

#endif /* _GL_CXXDEFS_H */

/* The definition of _GL_ARG_NONNULL is copied here.  */
/* A C macro for declaring that specific arguments must not be NULL.
   Copyright (C) 2009-2025 Free Software Foundation, Inc.

   This program 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 of the License, or
   (at your option) any later version.

   This program 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/>.  */

/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
   that the values passed as arguments n, ..., m must be non-NULL pointers.
   n = 1 stands for the first argument, n = 2 for the second argument etc.  */
#ifndef _GL_ARG_NONNULL
# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__
#  define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
# else
#  define _GL_ARG_NONNULL(params)
# endif
#endif

/* The definition of _GL_WARN_ON_USE is copied here.  */
/* A C macro for emitting warnings if a function is used.
   Copyright (C) 2010-2025 Free Software Foundation, Inc.

   This program 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 of the License, or
   (at your option) any later version.

   This program 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/>.  */

/* _GL_WARN_ON_USE (function, "literal string") issues a declaration
   for FUNCTION which will then trigger a compiler warning containing
   the text of "literal string" anywhere that function is called, if
   supported by the compiler.  If the compiler does not support this
   feature, the macro expands to an unused extern declaration.

   _GL_WARN_ON_USE_ATTRIBUTE ("literal string") expands to the
   attribute used in _GL_WARN_ON_USE.  If the compiler does not support
   this feature, it expands to empty.

   These macros are useful for marking a function as a potential
   portability trap, with the intent that "literal string" include
   instructions on the replacement function that should be used
   instead.
   _GL_WARN_ON_USE is for functions with 'extern' linkage.
   _GL_WARN_ON_USE_ATTRIBUTE is for functions with 'static' or 'inline'
   linkage.

   _GL_WARN_ON_USE should not be used more than once for a given function
   in a given compilation unit (because this may generate a warning even
   if the function is never called).

   However, one of the reasons that a function is a portability trap is
   if it has the wrong signature.  Declaring FUNCTION with a different
   signature in C is a compilation error, so this macro must use the
   same type as any existing declaration so that programs that avoid
   the problematic FUNCTION do not fail to compile merely because they
   included a header that poisoned the function.  But this implies that
   _GL_WARN_ON_USE is only safe to use if FUNCTION is known to already
   have a declaration.  Use of this macro implies that there must not
   be any other macro hiding the declaration of FUNCTION; but
   undefining FUNCTION first is part of the poisoning process anyway
   (although for symbols that are provided only via a macro, the result
   is a compilation error rather than a warning containing
   "literal string").  Also note that in C++, it is only safe to use if
   FUNCTION has no overloads.

   For an example, it is possible to poison 'getline' by:
   - adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]],
     [getline]) in configure.ac, which potentially defines
     HAVE_RAW_DECL_GETLINE
   - adding this code to a header that wraps the system <stdio.h>:
     #undef getline
     #if HAVE_RAW_DECL_GETLINE
     _GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but"
       "not universally present; use the gnulib module getline");
     #endif

   It is not possible to directly poison global variables.  But it is
   possible to write a wrapper accessor function, and poison that
   (less common usage, like &environ, will cause a compilation error
   rather than issue the nice warning, but the end result of informing
   the developer about their portability problem is still achieved):
     #if HAVE_RAW_DECL_ENVIRON
     static char ***
     rpl_environ (void) { return &environ; }
     _GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared");
     # undef environ
     # define environ (*rpl_environ ())
     #endif
   or better (avoiding contradictory use of 'static' and 'extern'):
     #if HAVE_RAW_DECL_ENVIRON
     static char ***
     _GL_WARN_ON_USE_ATTRIBUTE ("environ is not always properly declared")
     rpl_environ (void) { return &environ; }
     # undef environ
     # define environ (*rpl_environ ())
     #endif
   */
#ifndef _GL_WARN_ON_USE

# if (4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)) && !defined __clang__
/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
#  define _GL_WARN_ON_USE(function, message) \
_GL_WARN_EXTERN_C __typeof__ (function) function __attribute__ ((__warning__ (message)))
#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
  __attribute__ ((__warning__ (message)))
# elif __clang_major__ >= 4
/* Another compiler attribute is available in clang.  */
#  define _GL_WARN_ON_USE(function, message) \
_GL_WARN_EXTERN_C __typeof__ (function) function \
  __attribute__ ((__diagnose_if__ (1, message, "warning")))
#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
  __attribute__ ((__diagnose_if__ (1, message, "warning")))
# elif (__GNUC__ >= 3 || defined __clang__) && GNULIB_STRICT_CHECKING
/* Verify the existence of the function.  */
#  define _GL_WARN_ON_USE(function, message) \
_GL_WARN_EXTERN_C __typeof__ (function) function
#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
# else /* Unsupported.  */
#  define _GL_WARN_ON_USE(function, message) \
_GL_WARN_EXTERN_C int _gl_warn_on_use
#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
# endif
#endif

/* _GL_WARN_ON_USE_CXX (function, rettype_gcc, rettype_clang, parameters_and_attributes, "message")
   is like _GL_WARN_ON_USE (function, "message"), except that in C++ mode the
   function is declared with the given prototype, consisting of return type,
   parameters, and attributes.
   This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does
   not work in this case.  */
#ifndef _GL_WARN_ON_USE_CXX
# if !defined __cplusplus
#  define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
     _GL_WARN_ON_USE (function, msg)
# else
#  if (4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)) && !defined __clang__
/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
extern rettype_gcc function parameters_and_attributes \
  __attribute__ ((__warning__ (msg)))
#  elif __clang_major__ >= 4
/* Another compiler attribute is available in clang.  */
#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
extern rettype_clang function parameters_and_attributes \
  __attribute__ ((__diagnose_if__ (1, msg, "warning")))
#  elif (__GNUC__ >= 3 || defined __clang__) && GNULIB_STRICT_CHECKING
/* Verify the existence of the function.  */
#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
extern rettype_gcc function parameters_and_attributes
#  else /* Unsupported.  */
#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
_GL_WARN_EXTERN_C int _gl_warn_on_use
#  endif
# endif
#endif

/* _GL_WARN_EXTERN_C declaration;
   performs the declaration with C linkage.  */
#ifndef _GL_WARN_EXTERN_C
# if defined __cplusplus
#  define _GL_WARN_EXTERN_C extern "C"
# else
#  define _GL_WARN_EXTERN_C extern
# endif
#endif


_GL_INLINE_HEADER_BEGIN


#if !(defined __cplusplus ? 0 || 0 : 1)

/* An 8-bit variant of wchar_t.
   Note: This type is only mandated by ISO C 23 or newer, and it does
   denote UTF-8 units.  */
typedef unsigned char char8_t;

#elif 0

typedef unsigned char gl_char8_t;
# define char8_t gl_char8_t

#endif

#if !(defined __cplusplus ? 0 || 0 : 1)

/* A 16-bit variant of wchar_t.
   Note: This type is only mandated by ISO C 11 or newer.  In ISO C 23
   and newer, it denotes UTF-16 units; in older versions of ISO C it did
   so only on platforms on which __STDC_UTF_16__ was defined.  */
typedef uint_least16_t char16_t;

#elif 0

typedef uint_least16_t gl_char16_t;
# define char16_t gl_char16_t

#endif

#if !(defined __cplusplus ? 0 || 0 : 1)

/* A 32-bit variant of wchar_t.
   Note: This type is only mandated by ISO C 11 or newer.  In ISO C 23
   and newer, it denotes UTF-32 code points; in older versions of ISO C
   it did so only on platforms on which __STDC_UTF_32__ was defined.
   In gnulib, we guarantee that it denotes UTF-32 code points if and
   only if the module 'uchar-h-c23' is in use.  */
typedef uint_least32_t char32_t;

#elif 0

typedef uint_least32_t gl_char32_t;
# define char32_t gl_char32_t

#endif

/* Define if a 'char32_t' can hold more characters than a 'wchar_t'.  */
#if 0                    /* 32-bit AIX, Cygwin, native Windows */
# define _GL_SMALL_WCHAR_T 1
#endif

/* Define if 'wchar_t', like 'char32_t',
     - is a 32-bit type, and
     - represents Unicode code points.
   For this test, we can use __STDC_ISO_10646__ (defined by glibc, musl libc,
   Cygwin) but need to consider _GL_SMALL_WCHAR_T, so as to exclude Cygwin.
   We cannot use __STDC_UTF_16__ or __STDC_UTF_32__
     - because these macros provide info about char16_t and char32_t (not
       wchar_t!), and
     - because GCC >= 4.9 defines these macros on all platforms, even on
       FreeBSD and Solaris.
   We should better not use __STD_UTF_16__, __STD_UTF_32__ either, because
   these macros are misspellings, only defined by Android's <uchar.h>.  */
#if defined __STDC_ISO_10646__ && !_GL_SMALL_WCHAR_T
/* glibc, musl libc */
# define _GL_WCHAR_T_IS_UCS4 1
#endif
#if _GL_WCHAR_T_IS_UCS4
static_assert (sizeof (char32_t) == sizeof (wchar_t));
#endif


/* Convert a single-byte character to a 32-bit wide character.  */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_BTOC32
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ATTRIBUTE_PURE wint_t
btoc32 (int c)
{
  return
#  if 1 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         btowc (c);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (btoc32, wint_t, (int c), _GL_ATTRIBUTE_PURE);
# endif
_GL_CXXALIAS_SYS (btoc32, wint_t, (int c));
_GL_CXXALIASWARN (btoc32);
#endif


/* Test a specific property of a 32-bit wide character.  */
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISALNUM
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isalnum (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswalnum (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isalnum, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isalnum, int, (wint_t wc));
_GL_CXXALIASWARN (c32isalnum);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISALPHA
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isalpha (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswalpha (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isalpha, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isalpha, int, (wint_t wc));
_GL_CXXALIASWARN (c32isalpha);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISBLANK
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isblank (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswblank (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isblank, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isblank, int, (wint_t wc));
_GL_CXXALIASWARN (c32isblank);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISCNTRL
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32iscntrl (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswcntrl (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32iscntrl, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32iscntrl, int, (wint_t wc));
_GL_CXXALIASWARN (c32iscntrl);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISDIGIT
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isdigit (wint_t wc)
{
  return
#  if 1 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswdigit (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isdigit, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isdigit, int, (wint_t wc));
_GL_CXXALIASWARN (c32isdigit);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISGRAPH
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isgraph (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswgraph (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isgraph, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isgraph, int, (wint_t wc));
_GL_CXXALIASWARN (c32isgraph);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISLOWER
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32islower (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswlower (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32islower, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32islower, int, (wint_t wc));
_GL_CXXALIASWARN (c32islower);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISPRINT
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isprint (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswprint (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isprint, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isprint, int, (wint_t wc));
_GL_CXXALIASWARN (c32isprint);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISPUNCT
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32ispunct (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswpunct (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32ispunct, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32ispunct, int, (wint_t wc));
_GL_CXXALIASWARN (c32ispunct);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISSPACE
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isspace (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswspace (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isspace, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isspace, int, (wint_t wc));
_GL_CXXALIASWARN (c32isspace);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISUPPER
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isupper (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswupper (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isupper, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isupper, int, (wint_t wc));
_GL_CXXALIASWARN (c32isupper);
#endif
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32ISXDIGIT
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32isxdigit (wint_t wc)
{
  return
#  if 1 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswxdigit (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32isxdigit, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32isxdigit, int, (wint_t wc));
_GL_CXXALIASWARN (c32isxdigit);
#endif


/* Case mapping of a 32-bit wide character.  */
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32TOLOWER
_GL_BEGIN_C_LINKAGE
_GL_INLINE wint_t
c32tolower (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         towlower (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32tolower, wint_t, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32tolower, wint_t, (wint_t wc));
_GL_CXXALIASWARN (c32tolower);
#endif
#if 0
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32TOUPPER
_GL_BEGIN_C_LINKAGE
_GL_INLINE wint_t
c32toupper (wint_t wc)
{
  return
#  if defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         towupper (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32toupper, wint_t, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32toupper, wint_t, (wint_t wc));
_GL_CXXALIASWARN (c32toupper);
#endif


/* Number of screen columns needed for a 32-bit wide character.  */
#if 1
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32WIDTH
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32width (char32_t wc)
{
  return
#  if 1 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         wcwidth (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32width, int, (char32_t wc), );
# endif
_GL_CXXALIAS_SYS (c32width, int, (char32_t wc));
_GL_CXXALIASWARN (c32width);
#endif


/* Converts a 32-bit wide character to a multibyte character.  */
#if 0
# if 0
#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
#   undef c32rtomb
#   define c32rtomb rpl_c32rtomb
#  endif
_GL_FUNCDECL_RPL (c32rtomb, size_t, (char *s, char32_t wc, mbstate_t *ps), );
_GL_CXXALIAS_RPL (c32rtomb, size_t, (char *s, char32_t wc, mbstate_t *ps));
# else
#  if !1
_GL_FUNCDECL_SYS (c32rtomb, size_t, (char *s, char32_t wc, mbstate_t *ps), );
#  endif
_GL_CXXALIAS_SYS (c32rtomb, size_t, (char *s, char32_t wc, mbstate_t *ps));
# endif
# if __GLIBC__ + (__GLIBC_MINOR__ >= 16) > 2
_GL_CXXALIASWARN (c32rtomb);
# endif
#elif defined GNULIB_POSIXCHECK
# if HAVE_RAW_DECL_C32RTOMB
_GL_WARN_ON_USE (c32rtomb, "c32rtomb is not portable - "
                 "use gnulib module c32rtomb for portability");
# endif
#endif


/* Convert a 32-bit wide string to a string.  */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_C32SNRTOMBS
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((2)) size_t
c32snrtombs (char *dest, const char32_t **srcp, size_t srclen, size_t len,
             mbstate_t *ps)
{
  return
#  if 0 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         wcsnrtombs (dest, (const wchar_t **) srcp, srclen, len, ps);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32snrtombs, size_t,
                  (char *dest, const char32_t **srcp, size_t srclen, size_t len,
                   mbstate_t *ps),
                  _GL_ARG_NONNULL ((2)));
# endif
_GL_CXXALIAS_SYS (c32snrtombs, size_t,
                  (char *dest, const char32_t **srcp, size_t srclen, size_t len,
                   mbstate_t *ps));
_GL_CXXALIASWARN (c32snrtombs);
#endif


/* Convert a 32-bit wide string to a string.  */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_C32SRTOMBS
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((2)) size_t
c32srtombs (char *dest, const char32_t **srcp, size_t len, mbstate_t *ps)
{
  return
#  if 0 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         wcsrtombs (dest, (const wchar_t **) srcp, len, ps);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32srtombs, size_t,
                  (char *dest, const char32_t **srcp, size_t len,
                   mbstate_t *ps),
                  _GL_ARG_NONNULL ((2)));
# endif
_GL_CXXALIAS_SYS (c32srtombs, size_t,
                  (char *dest, const char32_t **srcp, size_t len,
                   mbstate_t *ps));
_GL_CXXALIASWARN (c32srtombs);
#endif


/* Convert a 32-bit wide string to a string.  */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_C32STOMBS
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((2)) size_t
c32stombs (char *dest, const char32_t *src, size_t len)
{
  mbstate_t state;

  mbszero (&state);
  return c32srtombs (dest, &src, len, &state);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32stombs, size_t,
                  (char *dest, const char32_t *src, size_t len),
                  _GL_ARG_NONNULL ((2)));
# endif
_GL_CXXALIAS_SYS (c32stombs, size_t,
                  (char *dest, const char32_t *src, size_t len));
_GL_CXXALIASWARN (c32stombs);
#endif


/* Number of screen columns needed for a size-bounded 32-bit wide string.  */
#if 0
# if (_GL_WCHAR_T_IS_UCS4 && !GNULIB_defined_mbstate_t) && !defined IN_C32SWIDTH
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((1)) int
c32swidth (const char32_t *s, size_t n)
{
  return
#  if 0 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         wcswidth ((const wchar_t *) s, n);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32swidth, int, (const char32_t *s, size_t n),
                                  _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (c32swidth, int, (const char32_t *s, size_t n));
_GL_CXXALIASWARN (c32swidth);
#endif


/* Converts a 32-bit wide character to unibyte character.
   Returns the single-byte representation of WC if it exists,
   or EOF otherwise.  */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_C32TOB
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32tob (wint_t wc)
{
  return
#  if 0 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         wctob (wc);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32tob, int, (wint_t wc), );
# endif
_GL_CXXALIAS_SYS (c32tob, int, (wint_t wc));
_GL_CXXALIASWARN (c32tob);
#endif


/* Converts a multibyte character to a 32-bit wide character.  */
#if 1
# if 1
#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
#   undef mbrtoc32
#   define mbrtoc32 rpl_mbrtoc32
#  endif
_GL_FUNCDECL_RPL (mbrtoc32, size_t,
                  (char32_t *pc, const char *s, size_t n, mbstate_t *ps), );
_GL_CXXALIAS_RPL (mbrtoc32, size_t,
                  (char32_t *pc, const char *s, size_t n, mbstate_t *ps));
# else
#  if !1
_GL_FUNCDECL_SYS (mbrtoc32, size_t,
                  (char32_t *pc, const char *s, size_t n, mbstate_t *ps), );
#  endif
_GL_CXXALIAS_SYS (mbrtoc32, size_t,
                  (char32_t *pc, const char *s, size_t n, mbstate_t *ps));
# endif
# if __GLIBC__ + (__GLIBC_MINOR__ >= 16) > 2
_GL_CXXALIASWARN (mbrtoc32);
# endif
#elif defined GNULIB_POSIXCHECK
# if HAVE_RAW_DECL_MBRTOC32
_GL_WARN_ON_USE (mbrtoc32, "mbrtoc32 is not portable - "
                 "use gnulib module mbrtoc32 for portability");
# endif
#endif


/* Converts a multibyte character and returns the next 16-bit wide
   character.  */
#if 0
# if 0
#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
#   undef mbrtoc16
#   define mbrtoc16 rpl_mbrtoc16
#  endif
_GL_FUNCDECL_RPL (mbrtoc16, size_t,
                  (char16_t *pc, const char *s, size_t n, mbstate_t *ps), );
_GL_CXXALIAS_RPL (mbrtoc16, size_t,
                  (char16_t *pc, const char *s, size_t n, mbstate_t *ps));
# else
#  if !1
_GL_FUNCDECL_SYS (mbrtoc16, size_t,
                  (char16_t *pc, const char *s, size_t n, mbstate_t *ps), );
#  endif
_GL_CXXALIAS_SYS (mbrtoc16, size_t,
                  (char16_t *pc, const char *s, size_t n, mbstate_t *ps));
# endif
# if __GLIBC__ + (__GLIBC_MINOR__ >= 16) > 2
_GL_CXXALIASWARN (mbrtoc16);
# endif
#elif defined GNULIB_POSIXCHECK
# if HAVE_RAW_DECL_MBRTOC16
_GL_WARN_ON_USE (mbrtoc16, "mbrtoc16 is not portable - "
                 "use gnulib module mbrtoc16 for portability");
# endif
#endif


/* Convert a string to a 32-bit wide string.  */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_MBSNRTOC32S
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((2)) size_t
mbsnrtoc32s (char32_t *dest, const char **srcp, size_t srclen, size_t len,
             mbstate_t *ps)
{
  return
#  if 0 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         mbsnrtowcs ((wchar_t *) dest, srcp, srclen, len, ps);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (mbsnrtoc32s, size_t,
                  (char32_t *dest, const char **srcp, size_t srclen, size_t len,
                   mbstate_t *ps),
                  _GL_ARG_NONNULL ((2)));
# endif
_GL_CXXALIAS_SYS (mbsnrtoc32s, size_t,
                  (char32_t *dest, const char **srcp, size_t srclen, size_t len,
                   mbstate_t *ps));
_GL_CXXALIASWARN (mbsnrtoc32s);
#endif


/* Convert a string to a 32-bit wide string.  */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_MBSRTOC32S
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((2)) size_t
mbsrtoc32s (char32_t *dest, const char **srcp, size_t len, mbstate_t *ps)
{
  return
#  if 0 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         mbsrtowcs ((wchar_t *) dest, srcp, len, ps);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (mbsrtoc32s, size_t,
                  (char32_t *dest, const char **srcp, size_t len,
                   mbstate_t *ps),
                  _GL_ARG_NONNULL ((2)));
# endif
_GL_CXXALIAS_SYS (mbsrtoc32s, size_t,
                  (char32_t *dest, const char **srcp, size_t len,
                   mbstate_t *ps));
_GL_CXXALIASWARN (mbsrtoc32s);
#endif


/* Convert a string to a 32-bit wide string.  */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_MBSTOC32S
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((2)) size_t
mbstoc32s (char32_t *dest, const char *src, size_t len)
{
  mbstate_t state;

  mbszero (&state);
  return mbsrtoc32s (dest, &src, len, &state);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (mbstoc32s, size_t,
                  (char32_t *dest, const char *src, size_t len),
                  _GL_ARG_NONNULL ((2)));
# endif
_GL_CXXALIAS_SYS (mbstoc32s, size_t,
                  (char32_t *dest, const char *src, size_t len));
_GL_CXXALIASWARN (mbstoc32s);
#endif


#if 0 || 0
/* A scalar type.  Instances of this type, other than (c32_type_test_t) 0,
   represent a character property, sometimes also viewed as a "character class".
   It can be applied to 32-bit wide characters.  It is the counterpart of
   type 'wctype_t' for wide characters.
   To test whether a given character has a certain property, use the function
   'c32_apply_type_test'.  */
# if _GL_WCHAR_T_IS_UCS4
typedef wctype_t c32_type_test_t;
# else
typedef /*bool*/int (*c32_type_test_t) (wint_t wc);
# endif
#endif

/* Return a character property with the given name, or (c32_type_test_t) 0
   if the designated property does not exist.
   This function is the counterpart of function 'wctype' for wide characters.
 */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_C32_GET_TYPE_TEST
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((1)) c32_type_test_t
c32_get_type_test (const char *name)
{
  return
#  if 1 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         wctype (name);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32_get_type_test, c32_type_test_t, (const char *name),
                                                      _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (c32_get_type_test, c32_type_test_t, (const char *name));
_GL_CXXALIASWARN (c32_get_type_test);
#endif

/* Test whether a given 32-bit wide character has the specified character
   property.
   Return non-zero if true, zero if false or if the argument is WEOF.
   This function is the counterpart of function 'iswctype' for wide characters.
 */
#if 0
# if _GL_WCHAR_T_IS_UCS4
#  if !defined IN_C32_APPLY_TYPE_TEST
_GL_BEGIN_C_LINKAGE
_GL_INLINE int
c32_apply_type_test (wint_t wc, c32_type_test_t property)
{
  return
#  if 1 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         iswctype (wc, property);
}
_GL_END_C_LINKAGE
#  else
_GL_FUNCDECL_SYS (c32_apply_type_test, int,
                  (wint_t wc, c32_type_test_t property), );
#  endif
# else
_GL_FUNCDECL_SYS (c32_apply_type_test, int,
                  (wint_t wc, c32_type_test_t property),
                  _GL_ARG_NONNULL ((2)));
# endif
_GL_CXXALIAS_SYS (c32_apply_type_test, int,
                  (wint_t wc, c32_type_test_t property));
_GL_CXXALIASWARN (c32_apply_type_test);
#endif


#if 0 || 0
/* A scalar type.  Instances of this type, other than (c32_mapping_t) 0,
   represent a character mapping.  It can be applied to 32-bit wide characters.
   It is the counterpart of type 'wctrans_t' for wide characters.
   To apply a certain mapping to a given character, use the function
   'c32_apply_mapping'.  */
# if _GL_WCHAR_T_IS_UCS4
typedef wctrans_t c32_mapping_t;
# else
typedef wint_t (*c32_mapping_t) (wint_t wc);
# endif
#endif

/* Return a character mapping with the given name, or (c32_mapping_t) 0
   if the designated mapping does not exist.
   This function is the counterpart of function 'wctrans' for wide characters.
 */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_C32_GET_MAPPING
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((1)) c32_mapping_t
c32_get_mapping (const char *name)
{
  return
#  if 0 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         wctrans (name);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32_get_mapping, c32_mapping_t, (const char *name),
                                                  _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (c32_get_mapping, c32_mapping_t, (const char *name));
_GL_CXXALIASWARN (c32_get_mapping);
#endif

/* Apply the specified character mapping to a given 32-bit wide character.
   Return the result of this mapping.  Return the WC argument unchanged if it is
   WEOF.
   This function is the counterpart of function 'towctrans' for wide characters.
 */
#if 0
# if _GL_WCHAR_T_IS_UCS4 && !defined IN_C32_APPLY_MAPPING
_GL_BEGIN_C_LINKAGE
_GL_INLINE _GL_ARG_NONNULL ((2)) wint_t
c32_apply_mapping (wint_t wc, c32_mapping_t mapping)
{
  return
#  if 0 && defined __cplusplus && defined GNULIB_NAMESPACE
         GNULIB_NAMESPACE::
#  endif
         towctrans (wc, mapping);
}
_GL_END_C_LINKAGE
# else
_GL_FUNCDECL_SYS (c32_apply_mapping, wint_t,
                  (wint_t wc, c32_mapping_t mapping),
                  _GL_ARG_NONNULL ((2)));
# endif
_GL_CXXALIAS_SYS (c32_apply_mapping, wint_t,
                  (wint_t wc, c32_mapping_t mapping));
_GL_CXXALIASWARN (c32_apply_mapping);
#endif


_GL_INLINE_HEADER_END

#endif /* _GL_UCHAR_H */
#endif /* _GL_UCHAR_H */