/* Define current locale data for LC_CTYPE category.

   Copyright (C) 1995-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library 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.

   The GNU C Library 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 the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include "localeinfo.h"

#include <ctype.h>

#include <endian.h>

#include <stdint.h>

_NL_CURRENT_DEFINE (LC_CTYPE);

/* We are called after loading LC_CTYPE data to load it into

   the variables used by the ctype.h macros.  */

void

_nl_postload_ctype (void)

{

#define current(type,x,offset) \

  ((const type *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_##x) + offset)

  const union locale_data_value *const ctypes

    = _nl_global_locale.__locales[LC_CTYPE]->values;

/* These thread-local variables are defined in ctype-info.c.

   The declarations here must match those in localeinfo.h.

   These point into arrays of 384, so they can be indexed by any `unsigned

   char' value [0,255]; by EOF (-1); or by any `signed char' value

   [-128,-1).  ISO C requires that the ctype functions work for `unsigned

   char' values and for EOF; we also support negative `signed char' values

   for broken old programs.  The case conversion arrays are of `int's

   rather than `unsigned char's because tolower (EOF) must be EOF, which

   doesn't fit into an `unsigned char'.  But today more important is that

   the arrays are also used for multi-byte character sets.

   First we update the special members of _nl_global_locale as newlocale

   would.  This is necessary for uselocale (LC_GLOBAL_LOCALE) to find these

   values properly.  */

  _nl_global_locale.__ctype_b = (const unsigned short int *)

    ctypes[_NL_ITEM_INDEX (_NL_CTYPE_CLASS)].string + 128;

  _nl_global_locale.__ctype_tolower = (const int *)

    ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOLOWER)].string + 128;

  _nl_global_locale.__ctype_toupper = (const int *)

    ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOUPPER)].string + 128;

  /* Next we must set the thread-local caches if and only if this thread is

     in fact using the global locale.  */

  if (_NL_CURRENT_LOCALE == &_nl_global_locale)

    {

      __libc_tsd_set (const uint16_t *, CTYPE_B,

		      (void *) _nl_global_locale.__ctype_b);

      __libc_tsd_set (const int32_t *, CTYPE_TOUPPER,

		      (void *) _nl_global_locale.__ctype_toupper);

      __libc_tsd_set (const int32_t *, CTYPE_TOLOWER,

		      (void *) _nl_global_locale.__ctype_tolower);

    }

#include <shlib-compat.h>

#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3)

  /* We must use the exported names to access these so we are sure to

     be accessing the main executable's copy if it has COPY relocs.  */

  extern const unsigned short int *__ctype_b; /* Characteristics.  */

  extern const __int32_t *__ctype_tolower; /* Case conversions.  */

  extern const __int32_t *__ctype_toupper; /* Case conversions.  */

  extern const uint32_t *__ctype32_b;

  extern const uint32_t *__ctype32_toupper;

  extern const uint32_t *__ctype32_tolower;

  /* We need the .symver declarations these macros generate so that

     our references are explicitly bound to the versioned symbol names

     rather than the unadorned names that are not exported.  When the

     linker sees these bound to local symbols (as the unexported names are)

     then it doesn't generate a proper relocation to the global symbols.

     We need those relocations so that a versioned definition with a COPY

     reloc in an executable will override the libc.so definition.  */

compat_symbol (libc, __ctype_b, __ctype_b, GLIBC_2_0);

compat_symbol (libc, __ctype_tolower, __ctype_tolower, GLIBC_2_0);

compat_symbol (libc, __ctype_toupper, __ctype_toupper, GLIBC_2_0);

compat_symbol (libc, __ctype32_b, __ctype32_b, GLIBC_2_0);

compat_symbol (libc, __ctype32_tolower, __ctype32_tolower, GLIBC_2_2);

compat_symbol (libc, __ctype32_toupper, __ctype32_toupper, GLIBC_2_2);

  __ctype_b = current (uint16_t, CLASS, 128);

  __ctype_toupper = current (int32_t, TOUPPER, 128);

  __ctype_tolower = current (int32_t, TOLOWER, 128);

  __ctype32_b = current (uint32_t, CLASS32, 0);

  __ctype32_toupper = current (uint32_t, TOUPPER32, 0);

  __ctype32_tolower = current (uint32_t, TOLOWER32, 0);

#endif

}