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glibc/locale/lc-ctype.c
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/* Define current locale data for LC_CTYPE category. | |
Copyright (C) 1995-2016 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 | |
} |