mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
03992356e6
The only difference between noncompliant and C99-compliant scanf is that the former accepts the archaic GNU extension '%as' (also %aS and %a[...]) meaning to allocate space for the input string with malloc. This extension conflicts with C99's use of %a as a format _type_ meaning to read a floating-point number; POSIX.1-2008 standardized equivalent functionality using the modifier letter 'm' instead (%ms, %mS, %m[...]). The extension was already disabled in most conformance modes: specifically, any mode that doesn't involve _GNU_SOURCE and _does_ involve either strict conformance to C99 or loose conformance to both C99 and POSIX.1-2001 would get the C99-compliant scanf. With compilers new enough to use -std=gnu11 instead of -std=gnu89, or equivalent, that includes the default mode. With this patch, we now provide C99-compliant scanf in all configurations except when _GNU_SOURCE is defined *and* __STDC_VERSION__ or __cplusplus (whichever is relevant) indicates C89/C++98. This leaves the old scanf available under e.g. -std=c89 -D_GNU_SOURCE, but removes it from e.g. -std=gnu11 -D_GNU_SOURCE (it was already not present under -std=gnu11 without -D_GNU_SOURCE) and from -std=gnu89 without -D_GNU_SOURCE. There needs to be an internal override so we can compile the noncompliant scanf itself. This is the same problem we had when we removed 'gets' from _GNU_SOURCE and it's dealt with the same way: there's a new __GLIBC_USE symbol, DEPRECATED_SCANF, which defaults to off under the appropriate conditions for external code, but can be overridden by individual files within stdio. We also run into problems with PLT bypass for internal uses of sscanf, because libc_hidden_proto uses __REDIRECT and so does the logic in stdio.h for choosing which implementation of scanf to use; __REDIRECT isn't transitive, so include/stdio.h needs to bridge the gap with a macro. As far as I can tell, sscanf is the only function in this family that's internally called by unrelated code. Finally, there are several tests in stdio-common that use the extension. bug21.c is a regression test for a crash; it still exercises the relevant code when changed to use %ms instead of %as. scanf14.c through scanf17.c are more complicated since they are actually testing the subtleties of the extension - under what circumstances is 'a' treated as a modifier letter, etc. I changed all of them to use %ms instead of %as as well, but duplicated scanf14.c and scanf16.c as scanf14a.c and scanf16a.c. These still use %as and are compiled with -std=gnu89 to access the old extension. A bunch of diagnostic overrides and manual workarounds for the old stdio.h behavior become unnecessary. Yay! * include/features.h (__GLIBC_USE_DEPRECATED_SCANF): New __GLIBC_USE parameter. Only use deprecated scanf when __USE_GNU is defined and __STDC_VERSION__ is less than 199901L or __cplusplus is less than 201103L, whichever is relevant for the language being compiled. * libio/stdio.h, libio/bits/stdio-ldbl.h: Decide whether to redirect scanf, fscanf, sscanf, vscanf, vfscanf, and vsscanf to their __isoc99_ variants based only on __GLIBC_USE (DEPRECATED_SCANF). * wcsmbs/wchar.h: wcsmbs/bits/wchar-ldbl.h: Likewise for wscanf, fwscanf, swscanf, vwscanf, vfwscanf, and vswscanf. * libio/iovsscanf.c * libio/fwscanf.c * libio/iovswscanf.c * libio/swscanf.c * libio/vscanf.c * libio/vwscanf.c * libio/wscanf.c * stdio-common/fscanf.c * stdio-common/scanf.c * stdio-common/vfscanf.c * stdio-common/vfwscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-compat.c * sysdeps/ieee754/ldbl-opt/nldbl-fscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-fwscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-iovfscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-scanf.c * sysdeps/ieee754/ldbl-opt/nldbl-sscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-swscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-vfscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-vfwscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-vscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-vsscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-vswscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-vwscanf.c * sysdeps/ieee754/ldbl-opt/nldbl-wscanf.c: Override __GLIBC_USE_DEPRECATED_SCANF to 1. * stdio-common/sscanf.c: Likewise. Remove ldbl_hidden_def for __sscanf. * stdio-common/isoc99_sscanf.c: Add libc_hidden_def for __isoc99_sscanf. * include/stdio.h: Provide libc_hidden_proto for __isoc99_sscanf, not sscanf. [!__GLIBC_USE (DEPRECATED_SCANF)]: Define sscanf as __isoc99_scanf with a preprocessor macro. * stdio-common/bug21.c, stdio-common/scanf14.c: Use %ms instead of %as, %mS instead of %aS, %m[] instead of %a[]; remove DIAG_IGNORE_NEEDS_COMMENT for -Wformat. * stdio-common/scanf16.c: Likewise. Add __attribute__ ((format (scanf))) to xscanf, xfscanf, xsscanf. * stdio-common/scanf14a.c: New copy of scanf14.c which still uses %as, %aS, %a[]. Remove DIAG_IGNORE_NEEDS_COMMENT for -Wformat. * stdio-common/scanf16a.c: New copy of scanf16.c which still uses %as, %aS, %a[]. Add __attribute__ ((format (scanf))) to xscanf, xfscanf, xsscanf. * stdio-common/scanf15.c, stdio-common/scanf17.c: No need to override feature selection macros or provide definitions of u_char etc. * stdio-common/Makefile (tests): Add scanf14a and scanf16a. (CFLAGS-scanf15.c, CFLAGS-scanf17.c): Remove. (CFLAGS-scanf14a.c, CFLAGS-scanf16a.c): New. Compile these files with -std=gnu89.
858 lines
30 KiB
C
858 lines
30 KiB
C
/* Copyright (C) 1995-2019 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/>. */
|
|
|
|
/*
|
|
* 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__;
|
|
#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. */
|
|
|
|
#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;
|
|
|
|
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)
|
|
/* 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;
|
|
#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 is in
|
|
effect, this is handled in bits/wchar-ldbl.h. */
|
|
#if !__GLIBC_USE (DEPRECATED_SCANF) && !defined __LDBL_COMPAT
|
|
# 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))) */;
|
|
|
|
# if !defined __USE_GNU \
|
|
&& (!defined __LDBL_COMPAT || !defined __REDIRECT) \
|
|
&& (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
|
|
# 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
|
|
# include <bits/wchar2.h>
|
|
#endif
|
|
|
|
#ifdef __LDBL_COMPAT
|
|
# include <bits/wchar-ldbl.h>
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* wchar.h */
|