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glibc/wcsmbs/wchar.h
Joseph Myers 64924422a9 C2x strtol binary constant handling 
C2x adds binary integer constants starting with 0b or 0B, and supports
those constants in strtol-family functions when the base passed is 0
or 2.  Implement that strtol support for glibc.

As discussed at
<https://sourceware.org/pipermail/libc-alpha/2020-December/120414.html>,
this is incompatible with previous C standard versions, in that such
an input string starting with 0b or 0B was previously required to be
parsed as 0 (with the rest of the string unprocessed).  Thus, as
proposed there, this patch adds 20 new __isoc23_* functions with
appropriate header redirection support.  This patch does *not* do
anything about scanf %i (which will need 12 new functions per long
double variant, so 12, 24 or 36 depending on the glibc configuration),
instead leaving that for a future patch.  The function names would
remain as __isoc23_* even if C2x ends up published in 2024 rather than
2023.

Making this change leads to the question of what should happen to
internal uses of these functions in glibc and its tests.  The header
redirection (which applies for _GNU_SOURCE or any other feature test
macros enabling C2x features) has the effect of redirecting internal
uses but without those uses then ending up at a hidden alias (see the
comment in include/stdio.h about interaction with libc_hidden_proto).
It seems desirable for the default for internal uses to be the same
versions used by normal code using _GNU_SOURCE, so rather than doing
anything to disable that redirection, similar macro definitions to
those in include/stdio.h are added to the include/ headers for the new
functions.

Given that the default for uses in glibc is for the redirections to
apply, the next question is whether the C2x semantics are correct for
all those uses.  Uses with the base fixed to 10, 16 or any other value
other than 0 or 2 can be ignored.  I think this leaves the following
internal uses to consider (an important consideration for review of
this patch will be both whether this list is complete and whether my
conclusions on all entries in it are correct):

benchtests/bench-malloc-simple.c
benchtests/bench-string.h
elf/sotruss-lib.c
math/libm-test-support.c
nptl/perf.c
nscd/nscd_conf.c
nss/nss_files/files-parse.c
posix/tst-fnmatch.c
posix/wordexp.c
resolv/inet_addr.c
rt/tst-mqueue7.c
soft-fp/testit.c
stdlib/fmtmsg.c
support/support_test_main.c
support/test-container.c
sysdeps/pthread/tst-mutex10.c

I think all of these places are OK with the new semantics, except for
resolv/inet_addr.c, where the POSIX semantics of inet_addr do not
allow for binary constants; thus, I changed that file (to use
__strtoul_internal, whose semantics are unchanged) and added a test
for this case.  In the case of posix/wordexp.c I think accepting
binary constants is OK since POSIX explicitly allows additional forms
of shell arithmetic expressions, and in stdlib/fmtmsg.c SEV_LEVEL is
not in POSIX so again I think accepting binary constants is OK.

Functions such as __strtol_internal, which are only exported for
compatibility with old binaries from when those were used in inline
functions in headers, have unchanged semantics; the __*_l_internal
versions (purely internal to libc and not exported) have a new
argument to specify whether to accept binary constants.

As well as for the standard functions, the header redirection also
applies to the *_l versions (GNU extensions), and to legacy functions
such as strtoq, to avoid confusing inconsistency (the *q functions
redirect to __isoc23_*ll rather than needing their own __isoc23_*
entry points).  For the functions that are only declared with
_GNU_SOURCE, this means the old versions are no longer available for
normal user programs at all.  An internal __GLIBC_USE_C2X_STRTOL macro
is used to control the redirections in the headers, and cases in glibc
that wish to avoid the redirections - the function implementations
themselves and the tests of the old versions of the GNU functions -
then undefine and redefine that macro to allow the old versions to be
accessed.  (There would of course be greater complexity should we wish
to make any of the old versions into compat symbols / avoid them being
defined at all for new glibc ABIs.)

strtol_l.c has some similarity to strtol.c in gnulib, but has already
diverged some way (and isn't listed at all at
https://sourceware.org/glibc/wiki/SharedSourceFiles unlike strtoll.c
and strtoul.c); I haven't made any attempts at gnulib compatibility in
the changes to that file.

I note incidentally that inttypes.h and wchar.h are missing the
__nonnull present on declarations of this family of functions in
stdlib.h; I didn't make any changes in that regard for the new
declarations added.
2023-02-16 23:02:40 +00:00

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/* Copyright (C) 1995-2023 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/>. */
/*
* ISO C99 Standard: 7.24
* Extended multibyte and wide character utilities <wchar.h>
*/
#ifndef _WCHAR_H
#define _WCHAR_H 1
#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
#include <bits/libc-header-start.h>
/* Gather machine dependent type support. */
#include <bits/floatn.h>
#define __need_size_t
#define __need_wchar_t
#define __need_NULL
#include <stddef.h>
#define __need___va_list
#include <stdarg.h>
#include <bits/wchar.h>
#include <bits/types/wint_t.h>
#include <bits/types/mbstate_t.h>
#include <bits/types/__FILE.h>
#if defined __USE_UNIX98 || defined __USE_XOPEN2K
# include <bits/types/FILE.h>
#endif
#ifdef __USE_XOPEN2K8
# include <bits/types/locale_t.h>
#endif
/* Tell the caller that we provide correct C++ prototypes. */
#if defined __cplusplus && __GNUC_PREREQ (4, 4)
# define __CORRECT_ISO_CPP_WCHAR_H_PROTO
#endif
#ifndef WCHAR_MIN
/* These constants might also be defined in <inttypes.h>. */
# define WCHAR_MIN __WCHAR_MIN
# define WCHAR_MAX __WCHAR_MAX
#endif
#ifndef WEOF
# define WEOF (0xffffffffu)
#endif
/* All versions of XPG prior to the publication of ISO C99 required
the bulk of <wctype.h>'s declarations to appear in this header
(because <wctype.h> did not exist prior to C99). In POSIX.1-2001
those declarations were marked as XSI extensions; in -2008 they
were additionally marked as obsolescent. _GNU_SOURCE mode
anticipates the removal of these declarations in the next revision
of POSIX. */
#if (defined __USE_XOPEN && !defined __USE_GNU \
&& !(defined __USE_XOPEN2K && !defined __USE_XOPEN2KXSI))
# include <bits/wctype-wchar.h>
#endif
__BEGIN_DECLS
/* This incomplete type is defined in <time.h> but needed here because
of `wcsftime'. */
struct tm;
/* Copy SRC to DEST. */
extern wchar_t *wcscpy (wchar_t *__restrict __dest,
const wchar_t *__restrict __src)
__THROW __nonnull ((1, 2));
/* Copy no more than N wide-characters of SRC to DEST. */
extern wchar_t *wcsncpy (wchar_t *__restrict __dest,
const wchar_t *__restrict __src, size_t __n)
__THROW __nonnull ((1, 2));
/* Append SRC onto DEST. */
extern wchar_t *wcscat (wchar_t *__restrict __dest,
const wchar_t *__restrict __src)
__THROW __nonnull ((1, 2));
/* Append no more than N wide-characters of SRC onto DEST. */
extern wchar_t *wcsncat (wchar_t *__restrict __dest,
const wchar_t *__restrict __src, size_t __n)
__THROW __nonnull ((1, 2));
/* Compare S1 and S2. */
extern int wcscmp (const wchar_t *__s1, const wchar_t *__s2)
__THROW __attribute_pure__ __nonnull ((1, 2));
/* Compare N wide-characters of S1 and S2. */
extern int wcsncmp (const wchar_t *__s1, const wchar_t *__s2, size_t __n)
__THROW __attribute_pure__ __nonnull ((1, 2));
#ifdef __USE_XOPEN2K8
/* Compare S1 and S2, ignoring case. */
extern int wcscasecmp (const wchar_t *__s1, const wchar_t *__s2) __THROW;
/* Compare no more than N chars of S1 and S2, ignoring case. */
extern int wcsncasecmp (const wchar_t *__s1, const wchar_t *__s2,
size_t __n) __THROW;
/* Similar to the two functions above but take the information from
the provided locale and not the global locale. */
extern int wcscasecmp_l (const wchar_t *__s1, const wchar_t *__s2,
locale_t __loc) __THROW;
extern int wcsncasecmp_l (const wchar_t *__s1, const wchar_t *__s2,
size_t __n, locale_t __loc) __THROW;
#endif
/* Compare S1 and S2, both interpreted as appropriate to the
LC_COLLATE category of the current locale. */
extern int wcscoll (const wchar_t *__s1, const wchar_t *__s2) __THROW;
/* Transform S2 into array pointed to by S1 such that if wcscmp is
applied to two transformed strings the result is the as applying
`wcscoll' to the original strings. */
extern size_t wcsxfrm (wchar_t *__restrict __s1,
const wchar_t *__restrict __s2, size_t __n) __THROW;
#ifdef __USE_XOPEN2K8
/* Similar to the two functions above but take the information from
the provided locale and not the global locale. */
/* Compare S1 and S2, both interpreted as appropriate to the
LC_COLLATE category of the given locale. */
extern int wcscoll_l (const wchar_t *__s1, const wchar_t *__s2,
locale_t __loc) __THROW;
/* Transform S2 into array pointed to by S1 such that if wcscmp is
applied to two transformed strings the result is the as applying
`wcscoll' to the original strings. */
extern size_t wcsxfrm_l (wchar_t *__s1, const wchar_t *__s2,
size_t __n, locale_t __loc) __THROW;
/* Duplicate S, returning an identical malloc'd string. */
extern wchar_t *wcsdup (const wchar_t *__s) __THROW
__attribute_malloc__ __attr_dealloc_free;
#endif
/* Find the first occurrence of WC in WCS. */
#ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
extern "C++" wchar_t *wcschr (wchar_t *__wcs, wchar_t __wc)
__THROW __asm ("wcschr") __attribute_pure__;
extern "C++" const wchar_t *wcschr (const wchar_t *__wcs, wchar_t __wc)
__THROW __asm ("wcschr") __attribute_pure__;
#else
extern wchar_t *wcschr (const wchar_t *__wcs, wchar_t __wc)
__THROW __attribute_pure__;
#endif
/* Find the last occurrence of WC in WCS. */
#ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
extern "C++" wchar_t *wcsrchr (wchar_t *__wcs, wchar_t __wc)
__THROW __asm ("wcsrchr") __attribute_pure__;
extern "C++" const wchar_t *wcsrchr (const wchar_t *__wcs, wchar_t __wc)
__THROW __asm ("wcsrchr") __attribute_pure__;
#else
extern wchar_t *wcsrchr (const wchar_t *__wcs, wchar_t __wc)
__THROW __attribute_pure__;
#endif
#ifdef __USE_GNU
/* This function is similar to `wcschr'. But it returns a pointer to
the closing NUL wide character in case C is not found in S. */
extern wchar_t *wcschrnul (const wchar_t *__s, wchar_t __wc)
__THROW __attribute_pure__;
#endif
/* Return the length of the initial segmet of WCS which
consists entirely of wide characters not in REJECT. */
extern size_t wcscspn (const wchar_t *__wcs, const wchar_t *__reject)
__THROW __attribute_pure__;
/* Return the length of the initial segmet of WCS which
consists entirely of wide characters in ACCEPT. */
extern size_t wcsspn (const wchar_t *__wcs, const wchar_t *__accept)
__THROW __attribute_pure__;
/* Find the first occurrence in WCS of any character in ACCEPT. */
#ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
extern "C++" wchar_t *wcspbrk (wchar_t *__wcs, const wchar_t *__accept)
__THROW __asm ("wcspbrk") __attribute_pure__;
extern "C++" const wchar_t *wcspbrk (const wchar_t *__wcs,
const wchar_t *__accept)
__THROW __asm ("wcspbrk") __attribute_pure__;
#else
extern wchar_t *wcspbrk (const wchar_t *__wcs, const wchar_t *__accept)
__THROW __attribute_pure__;
#endif
/* Find the first occurrence of NEEDLE in HAYSTACK. */
#ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
extern "C++" wchar_t *wcsstr (wchar_t *__haystack, const wchar_t *__needle)
__THROW __asm ("wcsstr") __attribute_pure__;
extern "C++" const wchar_t *wcsstr (const wchar_t *__haystack,
const wchar_t *__needle)
__THROW __asm ("wcsstr") __attribute_pure__;
#else
extern wchar_t *wcsstr (const wchar_t *__haystack, const wchar_t *__needle)
__THROW __attribute_pure__;
#endif
/* Divide WCS into tokens separated by characters in DELIM. */
extern wchar_t *wcstok (wchar_t *__restrict __s,
const wchar_t *__restrict __delim,
wchar_t **__restrict __ptr) __THROW;
/* Return the number of wide characters in S. */
extern size_t wcslen (const wchar_t *__s) __THROW __attribute_pure__;
#ifdef __USE_XOPEN
/* Another name for `wcsstr' from XPG4. */
# ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
extern "C++" wchar_t *wcswcs (wchar_t *__haystack, const wchar_t *__needle)
__THROW __asm ("wcswcs") __attribute_pure__;
extern "C++" const wchar_t *wcswcs (const wchar_t *__haystack,
const wchar_t *__needle)
__THROW __asm ("wcswcs") __attribute_pure__;
# else
extern wchar_t *wcswcs (const wchar_t *__haystack, const wchar_t *__needle)
__THROW __attribute_pure__;
# endif
#endif
#ifdef __USE_XOPEN2K8
/* Return the number of wide characters in S, but at most MAXLEN. */
extern size_t wcsnlen (const wchar_t *__s, size_t __maxlen)
__THROW __attribute_pure__;
#endif
/* Search N wide characters of S for C. */
#ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
extern "C++" wchar_t *wmemchr (wchar_t *__s, wchar_t __c, size_t __n)
__THROW __asm ("wmemchr") __attribute_pure__;
extern "C++" const wchar_t *wmemchr (const wchar_t *__s, wchar_t __c,
size_t __n)
__THROW __asm ("wmemchr") __attribute_pure__;
#else
extern wchar_t *wmemchr (const wchar_t *__s, wchar_t __c, size_t __n)
__THROW __attribute_pure__;
#endif
/* Compare N wide characters of S1 and S2. */
extern int wmemcmp (const wchar_t *__s1, const wchar_t *__s2, size_t __n)
__THROW __attribute_pure__;
/* Copy N wide characters of SRC to DEST. */
extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
const wchar_t *__restrict __s2, size_t __n) __THROW;
/* Copy N wide characters of SRC to DEST, guaranteeing
correct behavior for overlapping strings. */
extern wchar_t *wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n)
__THROW;
/* Set N wide characters of S to C. */
extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
#ifdef __USE_GNU
/* Copy N wide characters of SRC to DEST and return pointer to following
wide character. */
extern wchar_t *wmempcpy (wchar_t *__restrict __s1,
const wchar_t *__restrict __s2, size_t __n)
__THROW;
#endif
/* Determine whether C constitutes a valid (one-byte) multibyte
character. */
extern wint_t btowc (int __c) __THROW;
/* Determine whether C corresponds to a member of the extended
character set whose multibyte representation is a single byte. */
extern int wctob (wint_t __c) __THROW;
/* Determine whether PS points to an object representing the initial
state. */
extern int mbsinit (const mbstate_t *__ps) __THROW __attribute_pure__;
/* Write wide character representation of multibyte character pointed
to by S to PWC. */
extern size_t mbrtowc (wchar_t *__restrict __pwc,
const char *__restrict __s, size_t __n,
mbstate_t *__restrict __p) __THROW;
/* Write multibyte representation of wide character WC to S. */
extern size_t wcrtomb (char *__restrict __s, wchar_t __wc,
mbstate_t *__restrict __ps) __THROW;
/* Return number of bytes in multibyte character pointed to by S. */
extern size_t __mbrlen (const char *__restrict __s, size_t __n,
mbstate_t *__restrict __ps) __THROW;
extern size_t mbrlen (const char *__restrict __s, size_t __n,
mbstate_t *__restrict __ps) __THROW;
#ifdef __USE_EXTERN_INLINES
/* Define inline function as optimization. */
/* We can use the BTOWC and WCTOB optimizations since we know that all
locales must use ASCII encoding for the values in the ASCII range
and because the wchar_t encoding is always ISO 10646. */
extern wint_t __btowc_alias (int __c) __asm ("btowc");
__extern_inline wint_t
__NTH (btowc (int __c))
{ return (__builtin_constant_p (__c) && __c >= '\0' && __c <= '\x7f'
? (wint_t) __c : __btowc_alias (__c)); }
extern int __wctob_alias (wint_t __c) __asm ("wctob");
__extern_inline int
__NTH (wctob (wint_t __wc))
{ return (__builtin_constant_p (__wc) && __wc >= L'\0' && __wc <= L'\x7f'
? (int) __wc : __wctob_alias (__wc)); }
__extern_inline size_t
__NTH (mbrlen (const char *__restrict __s, size_t __n,
mbstate_t *__restrict __ps))
{ return (__ps != NULL
? mbrtowc (NULL, __s, __n, __ps) : __mbrlen (__s, __n, NULL)); }
#endif
/* Write wide character representation of multibyte character string
SRC to DST. */
extern size_t mbsrtowcs (wchar_t *__restrict __dst,
const char **__restrict __src, size_t __len,
mbstate_t *__restrict __ps) __THROW;
/* Write multibyte character representation of wide character string
SRC to DST. */
extern size_t wcsrtombs (char *__restrict __dst,
const wchar_t **__restrict __src, size_t __len,
mbstate_t *__restrict __ps) __THROW;
#ifdef __USE_XOPEN2K8
/* Write wide character representation of at most NMC bytes of the
multibyte character string SRC to DST. */
extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
const char **__restrict __src, size_t __nmc,
size_t __len, mbstate_t *__restrict __ps) __THROW;
/* Write multibyte character representation of at most NWC characters
from the wide character string SRC to DST. */
extern size_t wcsnrtombs (char *__restrict __dst,
const wchar_t **__restrict __src,
size_t __nwc, size_t __len,
mbstate_t *__restrict __ps) __THROW;
#endif /* use POSIX 2008 */
/* The following functions are extensions found in X/Open CAE. */
#ifdef __USE_XOPEN
/* Determine number of column positions required for C. */
extern int wcwidth (wchar_t __c) __THROW;
/* Determine number of column positions required for first N wide
characters (or fewer if S ends before this) in S. */
extern int wcswidth (const wchar_t *__s, size_t __n) __THROW;
#endif /* Use X/Open. */
/* Convert initial portion of the wide string NPTR to `double'
representation. */
extern double wcstod (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#ifdef __USE_ISOC99
/* Likewise for `float' and `long double' sizes of floating-point numbers. */
extern float wcstof (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
extern long double wcstold (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#endif /* C99 */
/* Likewise for `_FloatN' and `_FloatNx' when support is enabled. */
#if __HAVE_FLOAT16 && defined __USE_GNU
extern _Float16 wcstof16 (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#endif
#if __HAVE_FLOAT32 && defined __USE_GNU
extern _Float32 wcstof32 (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#endif
#if __HAVE_FLOAT64 && defined __USE_GNU
extern _Float64 wcstof64 (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#endif
#if __HAVE_FLOAT128 && defined __USE_GNU
extern _Float128 wcstof128 (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#endif
#if __HAVE_FLOAT32X && defined __USE_GNU
extern _Float32x wcstof32x (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#endif
#if __HAVE_FLOAT64X && defined __USE_GNU
extern _Float64x wcstof64x (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#endif
#if __HAVE_FLOAT128X && defined __USE_GNU
extern _Float128x wcstof128x (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr) __THROW;
#endif
/* Convert initial portion of wide string NPTR to `long int'
representation. */
extern long int wcstol (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, int __base) __THROW;
/* Convert initial portion of wide string NPTR to `unsigned long int'
representation. */
extern unsigned long int wcstoul (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, int __base)
__THROW;
#ifdef __USE_ISOC99
/* Convert initial portion of wide string NPTR to `long long int'
representation. */
__extension__
extern long long int wcstoll (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, int __base)
__THROW;
/* Convert initial portion of wide string NPTR to `unsigned long long int'
representation. */
__extension__
extern unsigned long long int wcstoull (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base) __THROW;
#endif /* ISO C99. */
#ifdef __USE_GNU
/* Convert initial portion of wide string NPTR to `long long int'
representation. */
__extension__
extern long long int wcstoq (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, int __base)
__THROW;
/* Convert initial portion of wide string NPTR to `unsigned long long int'
representation. */
__extension__
extern unsigned long long int wcstouq (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base) __THROW;
#endif /* Use GNU. */
/* Versions of the above functions that handle '0b' and '0B' prefixes
in base 0 or 2. */
#if __GLIBC_USE (C2X_STRTOL)
# ifdef __REDIRECT
extern long int __REDIRECT_NTH (wcstol, (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base), __isoc23_wcstol);
extern unsigned long int __REDIRECT_NTH (wcstoul,
(const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base), __isoc23_wcstoul);
__extension__
extern long long int __REDIRECT_NTH (wcstoll,
(const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base), __isoc23_wcstoll);
__extension__
extern unsigned long long int __REDIRECT_NTH (wcstoull,
(const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base), __isoc23_wcstoull);
# ifdef __USE_GNU
__extension__
extern long long int __REDIRECT_NTH (wcstoq, (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base), __isoc23_wcstoll);
__extension__
extern unsigned long long int __REDIRECT_NTH (wcstouq,
(const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base), __isoc23_wcstoull);
# endif
# else
extern long int __isoc23_wcstol (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, int __base)
__THROW;
extern unsigned long int __isoc23_wcstoul (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base)
__THROW;
__extension__
extern long long int __isoc23_wcstoll (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base)
__THROW;
__extension__
extern unsigned long long int __isoc23_wcstoull (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base)
__THROW;
# define wcstol __isoc23_wcstol
# define wcstoul __isoc23_wcstoul
# define wcstoll __isoc23_wcstoll
# define wcstoull __isoc23_wcstoull
# ifdef __USE_GNU
# define wcstoq __isoc23_wcstoll
# define wcstouq __isoc23_wcstoull
# endif
# endif
#endif
#ifdef __USE_GNU
/* Parallel versions of the functions above which take the locale to
use as an additional parameter. These are GNU extensions inspired
by the POSIX.1-2008 extended locale API. */
extern long int wcstol_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, int __base,
locale_t __loc) __THROW;
extern unsigned long int wcstoul_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc) __THROW;
__extension__
extern long long int wcstoll_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc) __THROW;
__extension__
extern unsigned long long int wcstoull_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc)
__THROW;
/* Versions of the above functions that handle '0b' and '0B' prefixes
in base 0 or 2. */
# if __GLIBC_USE (C2X_STRTOL)
# ifdef __REDIRECT
extern long int __REDIRECT_NTH (wcstol_l, (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc),
__isoc23_wcstol_l);
extern unsigned long int __REDIRECT_NTH (wcstoul_l,
(const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc),
__isoc23_wcstoul_l);
__extension__
extern long long int __REDIRECT_NTH (wcstoll_l,
(const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc),
__isoc23_wcstoll_l);
__extension__
extern unsigned long long int __REDIRECT_NTH (wcstoull_l,
(const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc),
__isoc23_wcstoull_l);
# else
extern long int __isoc23_wcstol_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, int __base,
locale_t __loc) __THROW;
extern unsigned long int __isoc23_wcstoul_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc)
__THROW;
__extension__
extern long long int __isoc23_wcstoll_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc)
__THROW;
__extension__
extern unsigned long long int __isoc23_wcstoull_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
int __base, locale_t __loc)
__THROW;
# define wcstol_l __isoc23_wcstol_l
# define wcstoul_l __isoc23_wcstoul_l
# define wcstoll_l __isoc23_wcstoll_l
# define wcstoull_l __isoc23_wcstoull_l
# endif
# endif
extern double wcstod_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, locale_t __loc)
__THROW;
extern float wcstof_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr, locale_t __loc)
__THROW;
extern long double wcstold_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
locale_t __loc) __THROW;
# if __HAVE_FLOAT16
extern _Float16 wcstof16_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
locale_t __loc) __THROW;
# endif
# if __HAVE_FLOAT32
extern _Float32 wcstof32_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
locale_t __loc) __THROW;
# endif
# if __HAVE_FLOAT64
extern _Float64 wcstof64_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
locale_t __loc) __THROW;
# endif
# if __HAVE_FLOAT128
extern _Float128 wcstof128_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
locale_t __loc) __THROW;
# endif
# if __HAVE_FLOAT32X
extern _Float32x wcstof32x_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
locale_t __loc) __THROW;
# endif
# if __HAVE_FLOAT64X
extern _Float64x wcstof64x_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
locale_t __loc) __THROW;
# endif
# if __HAVE_FLOAT128X
extern _Float128x wcstof128x_l (const wchar_t *__restrict __nptr,
wchar_t **__restrict __endptr,
locale_t __loc) __THROW;
# endif
#endif /* use GNU */
#ifdef __USE_XOPEN2K8
/* Copy SRC to DEST, returning the address of the terminating L'\0' in
DEST. */
extern wchar_t *wcpcpy (wchar_t *__restrict __dest,
const wchar_t *__restrict __src) __THROW;
/* Copy no more than N characters of SRC to DEST, returning the address of
the last character written into DEST. */
extern wchar_t *wcpncpy (wchar_t *__restrict __dest,
const wchar_t *__restrict __src, size_t __n)
__THROW;
#endif
/* Wide character I/O functions. */
#if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
# ifndef __attr_dealloc_fclose
# if defined __has_builtin
# if __has_builtin (__builtin_fclose)
/* If the attribute macro hasn't been defined yet (by <stdio.h>) and
fclose is a built-in, use it. */
# define __attr_dealloc_fclose __attr_dealloc (__builtin_fclose, 1)
# endif
# endif
# endif
# ifndef __attr_dealloc_fclose
# define __attr_dealloc_fclose /* empty */
# endif
/* Like OPEN_MEMSTREAM, but the stream is wide oriented and produces
a wide character string. */
extern __FILE *open_wmemstream (wchar_t **__bufloc, size_t *__sizeloc) __THROW
__attribute_malloc__ __attr_dealloc_fclose;
#endif
#if defined __USE_ISOC95 || defined __USE_UNIX98
/* Select orientation for stream. */
extern int fwide (__FILE *__fp, int __mode) __THROW;
/* Write formatted output to STREAM.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int fwprintf (__FILE *__restrict __stream,
const wchar_t *__restrict __format, ...)
/* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
/* Write formatted output to stdout.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int wprintf (const wchar_t *__restrict __format, ...)
/* __attribute__ ((__format__ (__wprintf__, 1, 2))) */;
/* Write formatted output of at most N characters to S. */
extern int swprintf (wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __format, ...)
__THROW /* __attribute__ ((__format__ (__wprintf__, 3, 4))) */;
/* Write formatted output to S from argument list ARG.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int vfwprintf (__FILE *__restrict __s,
const wchar_t *__restrict __format,
__gnuc_va_list __arg)
/* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
/* Write formatted output to stdout from argument list ARG.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int vwprintf (const wchar_t *__restrict __format,
__gnuc_va_list __arg)
/* __attribute__ ((__format__ (__wprintf__, 1, 0))) */;
/* Write formatted output of at most N character to S from argument
list ARG. */
extern int vswprintf (wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __format,
__gnuc_va_list __arg)
__THROW /* __attribute__ ((__format__ (__wprintf__, 3, 0))) */;
/* Read formatted input from STREAM.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int fwscanf (__FILE *__restrict __stream,
const wchar_t *__restrict __format, ...)
/* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
/* Read formatted input from stdin.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int wscanf (const wchar_t *__restrict __format, ...)
/* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
/* Read formatted input from S. */
extern int swscanf (const wchar_t *__restrict __s,
const wchar_t *__restrict __format, ...)
__THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
/* For historical reasons, the C99-compliant versions of the scanf
functions are at alternative names. When __LDBL_COMPAT or
__LDOUBLE_REDIRECTS_TO_FLOAT128_ABI are in effect, this is handled in
bits/wchar-ldbl.h. */
#if !__GLIBC_USE (DEPRECATED_SCANF) && !defined __LDBL_COMPAT \
&& __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
# ifdef __REDIRECT
extern int __REDIRECT (fwscanf, (__FILE *__restrict __stream,
const wchar_t *__restrict __format, ...),
__isoc99_fwscanf)
/* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
extern int __REDIRECT (wscanf, (const wchar_t *__restrict __format, ...),
__isoc99_wscanf)
/* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
extern int __REDIRECT_NTH (swscanf, (const wchar_t *__restrict __s,
const wchar_t *__restrict __format,
...), __isoc99_swscanf)
/* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
# else
extern int __isoc99_fwscanf (__FILE *__restrict __stream,
const wchar_t *__restrict __format, ...);
extern int __isoc99_wscanf (const wchar_t *__restrict __format, ...);
extern int __isoc99_swscanf (const wchar_t *__restrict __s,
const wchar_t *__restrict __format, ...)
__THROW;
# define fwscanf __isoc99_fwscanf
# define wscanf __isoc99_wscanf
# define swscanf __isoc99_swscanf
# endif
# endif
#endif /* Use ISO C95, C99 and Unix98. */
#ifdef __USE_ISOC99
/* Read formatted input from S into argument list ARG.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int vfwscanf (__FILE *__restrict __s,
const wchar_t *__restrict __format,
__gnuc_va_list __arg)
/* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
/* Read formatted input from stdin into argument list ARG.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int vwscanf (const wchar_t *__restrict __format,
__gnuc_va_list __arg)
/* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
/* Read formatted input from S into argument list ARG. */
extern int vswscanf (const wchar_t *__restrict __s,
const wchar_t *__restrict __format,
__gnuc_va_list __arg)
__THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
/* Same redirection as above for the v*wscanf family. */
# if !__GLIBC_USE (DEPRECATED_SCANF) \
&& (!defined __LDBL_COMPAT || !defined __REDIRECT) \
&& (defined __STRICT_ANSI__ || defined __USE_XOPEN2K) \
&& __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
# ifdef __REDIRECT
extern int __REDIRECT (vfwscanf, (__FILE *__restrict __s,
const wchar_t *__restrict __format,
__gnuc_va_list __arg), __isoc99_vfwscanf)
/* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
extern int __REDIRECT (vwscanf, (const wchar_t *__restrict __format,
__gnuc_va_list __arg), __isoc99_vwscanf)
/* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
extern int __REDIRECT_NTH (vswscanf, (const wchar_t *__restrict __s,
const wchar_t *__restrict __format,
__gnuc_va_list __arg), __isoc99_vswscanf)
/* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
# else
extern int __isoc99_vfwscanf (__FILE *__restrict __s,
const wchar_t *__restrict __format,
__gnuc_va_list __arg);
extern int __isoc99_vwscanf (const wchar_t *__restrict __format,
__gnuc_va_list __arg);
extern int __isoc99_vswscanf (const wchar_t *__restrict __s,
const wchar_t *__restrict __format,
__gnuc_va_list __arg) __THROW;
# define vfwscanf __isoc99_vfwscanf
# define vwscanf __isoc99_vwscanf
# define vswscanf __isoc99_vswscanf
# endif
# endif
#endif /* Use ISO C99. */
/* Read a character from STREAM.
These functions are possible cancellation points and therefore not
marked with __THROW. */
extern wint_t fgetwc (__FILE *__stream);
extern wint_t getwc (__FILE *__stream);
/* Read a character from stdin.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern wint_t getwchar (void);
/* Write a character to STREAM.
These functions are possible cancellation points and therefore not
marked with __THROW. */
extern wint_t fputwc (wchar_t __wc, __FILE *__stream);
extern wint_t putwc (wchar_t __wc, __FILE *__stream);
/* Write a character to stdout.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern wint_t putwchar (wchar_t __wc);
/* Get a newline-terminated wide character string of finite length
from STREAM.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
__FILE *__restrict __stream);
/* Write a string to STREAM.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int fputws (const wchar_t *__restrict __ws,
__FILE *__restrict __stream);
/* Push a character back onto the input buffer of STREAM.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern wint_t ungetwc (wint_t __wc, __FILE *__stream);
#ifdef __USE_GNU
/* These are defined to be equivalent to the `char' functions defined
in POSIX.1:1996.
These functions are not part of POSIX and therefore no official
cancellation point. But due to similarity with an POSIX interface
or due to the implementation they are cancellation points and
therefore not marked with __THROW. */
extern wint_t getwc_unlocked (__FILE *__stream);
extern wint_t getwchar_unlocked (void);
/* This is the wide character version of a GNU extension.
This function is not part of POSIX and therefore no official
cancellation point. But due to similarity with an POSIX interface
or due to the implementation it is a cancellation point and
therefore not marked with __THROW. */
extern wint_t fgetwc_unlocked (__FILE *__stream);
/* Faster version when locking is not necessary.
This function is not part of POSIX and therefore no official
cancellation point. But due to similarity with an POSIX interface
or due to the implementation it is a cancellation point and
therefore not marked with __THROW. */
extern wint_t fputwc_unlocked (wchar_t __wc, __FILE *__stream);
/* These are defined to be equivalent to the `char' functions defined
in POSIX.1:1996.
These functions are not part of POSIX and therefore no official
cancellation point. But due to similarity with an POSIX interface
or due to the implementation they are cancellation points and
therefore not marked with __THROW. */
extern wint_t putwc_unlocked (wchar_t __wc, __FILE *__stream);
extern wint_t putwchar_unlocked (wchar_t __wc);
/* This function does the same as `fgetws' but does not lock the stream.
This function is not part of POSIX and therefore no official
cancellation point. But due to similarity with an POSIX interface
or due to the implementation it is a cancellation point and
therefore not marked with __THROW. */
extern wchar_t *fgetws_unlocked (wchar_t *__restrict __ws, int __n,
__FILE *__restrict __stream);
/* This function does the same as `fputws' but does not lock the stream.
This function is not part of POSIX and therefore no official
cancellation point. But due to similarity with an POSIX interface
or due to the implementation it is a cancellation point and
therefore not marked with __THROW. */
extern int fputws_unlocked (const wchar_t *__restrict __ws,
__FILE *__restrict __stream);
#endif
/* Format TP into S according to FORMAT.
Write no more than MAXSIZE wide characters and return the number
of wide characters written, or 0 if it would exceed MAXSIZE. */
extern size_t wcsftime (wchar_t *__restrict __s, size_t __maxsize,
const wchar_t *__restrict __format,
const struct tm *__restrict __tp) __THROW;
# ifdef __USE_GNU
/* Similar to `wcsftime' but takes the information from
the provided locale and not the global locale. */
extern size_t wcsftime_l (wchar_t *__restrict __s, size_t __maxsize,
const wchar_t *__restrict __format,
const struct tm *__restrict __tp,
locale_t __loc) __THROW;
# endif
/* Define some macros helping to catch buffer overflows. */
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
/* Declare all functions from bits/wchar2-decl.h first. */
# include <bits/wchar2-decl.h>
#endif
/* The following headers provide asm redirections. These redirections must
appear before the first usage of these functions, e.g. in bits/wchar.h. */
#if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
# include <bits/wchar-ldbl.h>
#endif
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
/* Now include the function definitions and redirects too. */
# include <bits/wchar2.h>
#endif
__END_DECLS
#endif /* wchar.h */
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