mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 22:10:13 +00:00
113 lines
4.7 KiB
C
113 lines
4.7 KiB
C
/* Define current locale data for LC_CTYPE category.
|
|
Copyright (C) 1995-2024 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
|
|
<https://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_reference (libc, __ctype_b, __ctype_b, GLIBC_2_0);
|
|
compat_symbol_reference (libc, __ctype_tolower, __ctype_tolower, GLIBC_2_0);
|
|
compat_symbol_reference (libc, __ctype_toupper, __ctype_toupper, GLIBC_2_0);
|
|
compat_symbol_reference (libc, __ctype32_b, __ctype32_b, GLIBC_2_0);
|
|
compat_symbol_reference (libc, __ctype32_tolower, __ctype32_tolower,
|
|
GLIBC_2_2);
|
|
compat_symbol_reference (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
|
|
}
|