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113 lines
4.7 KiB
C
113 lines
4.7 KiB
C
/* Define current locale data for LC_CTYPE category.
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Copyright (C) 1995-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include "localeinfo.h"
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#include <ctype.h>
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#include <endian.h>
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#include <stdint.h>
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_NL_CURRENT_DEFINE (LC_CTYPE);
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/* We are called after loading LC_CTYPE data to load it into
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the variables used by the ctype.h macros. */
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void
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_nl_postload_ctype (void)
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{
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#define current(type,x,offset) \
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((const type *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_##x) + offset)
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const union locale_data_value *const ctypes
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= _nl_global_locale.__locales[LC_CTYPE]->values;
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/* These thread-local variables are defined in ctype-info.c.
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The declarations here must match those in localeinfo.h.
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These point into arrays of 384, so they can be indexed by any `unsigned
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char' value [0,255]; by EOF (-1); or by any `signed char' value
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[-128,-1). ISO C requires that the ctype functions work for `unsigned
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char' values and for EOF; we also support negative `signed char' values
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for broken old programs. The case conversion arrays are of `int's
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rather than `unsigned char's because tolower (EOF) must be EOF, which
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doesn't fit into an `unsigned char'. But today more important is that
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the arrays are also used for multi-byte character sets.
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First we update the special members of _nl_global_locale as newlocale
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would. This is necessary for uselocale (LC_GLOBAL_LOCALE) to find these
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values properly. */
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_nl_global_locale.__ctype_b = (const unsigned short int *)
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ctypes[_NL_ITEM_INDEX (_NL_CTYPE_CLASS)].string + 128;
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_nl_global_locale.__ctype_tolower = (const int *)
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ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOLOWER)].string + 128;
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_nl_global_locale.__ctype_toupper = (const int *)
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ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOUPPER)].string + 128;
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/* Next we must set the thread-local caches if and only if this thread is
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in fact using the global locale. */
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if (_NL_CURRENT_LOCALE == &_nl_global_locale)
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{
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__libc_tsd_set (const uint16_t *, CTYPE_B,
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(void *) _nl_global_locale.__ctype_b);
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__libc_tsd_set (const int32_t *, CTYPE_TOUPPER,
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(void *) _nl_global_locale.__ctype_toupper);
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__libc_tsd_set (const int32_t *, CTYPE_TOLOWER,
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(void *) _nl_global_locale.__ctype_tolower);
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}
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#include <shlib-compat.h>
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3)
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/* We must use the exported names to access these so we are sure to
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be accessing the main executable's copy if it has COPY relocs. */
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extern const unsigned short int *__ctype_b; /* Characteristics. */
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extern const __int32_t *__ctype_tolower; /* Case conversions. */
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extern const __int32_t *__ctype_toupper; /* Case conversions. */
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extern const uint32_t *__ctype32_b;
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extern const uint32_t *__ctype32_toupper;
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extern const uint32_t *__ctype32_tolower;
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/* We need the .symver declarations these macros generate so that
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our references are explicitly bound to the versioned symbol names
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rather than the unadorned names that are not exported. When the
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linker sees these bound to local symbols (as the unexported names are)
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then it doesn't generate a proper relocation to the global symbols.
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We need those relocations so that a versioned definition with a COPY
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reloc in an executable will override the libc.so definition. */
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compat_symbol_reference (libc, __ctype_b, __ctype_b, GLIBC_2_0);
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compat_symbol_reference (libc, __ctype_tolower, __ctype_tolower, GLIBC_2_0);
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compat_symbol_reference (libc, __ctype_toupper, __ctype_toupper, GLIBC_2_0);
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compat_symbol_reference (libc, __ctype32_b, __ctype32_b, GLIBC_2_0);
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compat_symbol_reference (libc, __ctype32_tolower, __ctype32_tolower,
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GLIBC_2_2);
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compat_symbol_reference (libc, __ctype32_toupper, __ctype32_toupper,
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GLIBC_2_2);
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__ctype_b = current (uint16_t, CLASS, 128);
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__ctype_toupper = current (int32_t, TOUPPER, 128);
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__ctype_tolower = current (int32_t, TOLOWER, 128);
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__ctype32_b = current (uint32_t, CLASS32, 0);
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__ctype32_toupper = current (uint32_t, TOUPPER32, 0);
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__ctype32_tolower = current (uint32_t, TOLOWER32, 0);
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#endif
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}
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