[thirdparty/glibc.git] / libio / libio.h

/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Per Bothner <bothner@cygnus.com>.

   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/>.

   As a special exception, if you link the code in this file with
   files compiled with a GNU compiler to produce an executable,
   that does not cause the resulting executable to be covered by
   the GNU Lesser General Public License.  This exception does not
   however invalidate any other reasons why the executable file
   might be covered by the GNU Lesser General Public License.
   This exception applies to code released by its copyright holders
   in files containing the exception.  */

#ifndef _LIBIO_H
#define _LIBIO_H 1

#ifndef _LIBC
# error "libio.h should only be included when building glibc itself"
#endif
#ifdef _ISOMAC
# error "libio.h should not be included under _ISOMAC"
#endif

#include <stdio.h>

#if defined _IO_MTSAFE_IO && !defined _IO_lock_t_defined
# error "Someone forgot to include stdio-lock.h"
#endif

#define __need_wchar_t
#include <stddef.h>

#include <bits/types/__mbstate_t.h>
#include <bits/types/wint_t.h>
#include <gconv.h>

typedef struct
{
  struct __gconv_step *step;
  struct __gconv_step_data step_data;
} _IO_iconv_t;

#include <shlib-compat.h>

/* _IO_seekoff modes */
#define _IOS_INPUT	1
#define _IOS_OUTPUT	2

/* Magic number and bits for the _flags field.  The magic number is
   mostly vestigial, but preserved for compatibility.  It occupies the
   high 16 bits of _flags; the low 16 bits are actual flag bits.  */

#define _IO_MAGIC         0xFBAD0000 /* Magic number */
#define _IO_MAGIC_MASK    0xFFFF0000
#define _IO_USER_BUF          0x0001 /* Don't deallocate buffer on close. */
#define _IO_UNBUFFERED        0x0002
#define _IO_NO_READS          0x0004 /* Reading not allowed.  */
#define _IO_NO_WRITES         0x0008 /* Writing not allowed.  */
#define _IO_EOF_SEEN          0x0010
#define _IO_ERR_SEEN          0x0020
#define _IO_DELETE_DONT_CLOSE 0x0040 /* Don't call close(_fileno) on close.  */
#define _IO_LINKED            0x0080 /* In the list of all open files.  */
#define _IO_IN_BACKUP         0x0100
#define _IO_LINE_BUF          0x0200
#define _IO_TIED_PUT_GET      0x0400 /* Put and get pointer move in unison.  */
#define _IO_CURRENTLY_PUTTING 0x0800
#define _IO_IS_APPENDING      0x1000
#define _IO_IS_FILEBUF        0x2000
                           /* 0x4000  No longer used, reserved for compat.  */
#define _IO_USER_LOCK         0x8000

/* Bits for the _flags2 field.  */
#define _IO_FLAGS2_MMAP 1
#define _IO_FLAGS2_NOTCANCEL 2
#define _IO_FLAGS2_USER_WBUF 8
#define _IO_FLAGS2_NOCLOSE 32
#define _IO_FLAGS2_CLOEXEC 64
#define _IO_FLAGS2_NEED_LOCK 128

/* _IO_pos_BAD is an off64_t value indicating error, unknown, or EOF.  */
#define _IO_pos_BAD ((off64_t) -1)

/* _IO_pos_adjust adjusts an off64_t by some number of bytes.  */
#define _IO_pos_adjust(pos, delta) ((pos) += (delta))

/* _IO_pos_0 is an off64_t value indicating beginning of file.  */
#define _IO_pos_0 ((off64_t) 0)

struct _IO_jump_t;

/* A streammarker remembers a position in a buffer. */
struct _IO_marker {
  struct _IO_marker *_next;
  FILE *_sbuf;
  /* If _pos >= 0
 it points to _buf->Gbase()+_pos. FIXME comment */
  /* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
  int _pos;
};

struct _IO_codecvt
{
  _IO_iconv_t __cd_in;
  _IO_iconv_t __cd_out;
};

/* Extra data for wide character streams.  */
struct _IO_wide_data
{
  wchar_t *_IO_read_ptr;	/* Current read pointer */
  wchar_t *_IO_read_end;	/* End of get area. */
  wchar_t *_IO_read_base;	/* Start of putback+get area. */
  wchar_t *_IO_write_base;	/* Start of put area. */
  wchar_t *_IO_write_ptr;	/* Current put pointer. */
  wchar_t *_IO_write_end;	/* End of put area. */
  wchar_t *_IO_buf_base;	/* Start of reserve area. */
  wchar_t *_IO_buf_end;		/* End of reserve area. */
  /* The following fields are used to support backing up and undo. */
  wchar_t *_IO_save_base;	/* Pointer to start of non-current get area. */
  wchar_t *_IO_backup_base;	/* Pointer to first valid character of
				   backup area */
  wchar_t *_IO_save_end;	/* Pointer to end of non-current get area. */

  __mbstate_t _IO_state;
  __mbstate_t _IO_last_state;
  struct _IO_codecvt _codecvt;

  wchar_t _shortbuf[1];

  const struct _IO_jump_t *_wide_vtable;
};

struct _IO_FILE_plus;

extern struct _IO_FILE_plus _IO_2_1_stdin_;
extern struct _IO_FILE_plus _IO_2_1_stdout_;
extern struct _IO_FILE_plus _IO_2_1_stderr_;

struct _IO_cookie_file;

/* Initialize one of those.  */
extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
			     void *__cookie, cookie_io_functions_t __fns);

extern int __underflow (FILE *);
extern wint_t __wunderflow (FILE *);
extern wint_t __wuflow (FILE *);
extern wint_t __woverflow (FILE *, wint_t);

#define _IO_getc_unlocked(_fp) __getc_unlocked_body (_fp)
#define _IO_peekc_unlocked(_fp)						\
  (__glibc_unlikely ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end)	\
   && __underflow (_fp) == EOF						\
   ? EOF								\
   : *(unsigned char *) (_fp)->_IO_read_ptr)
#define _IO_putc_unlocked(_ch, _fp) __putc_unlocked_body (_ch, _fp)

# define _IO_getwc_unlocked(_fp)					\
  (__glibc_unlikely ((_fp)->_wide_data == NULL				\
		     || ((_fp)->_wide_data->_IO_read_ptr		\
			 >= (_fp)->_wide_data->_IO_read_end))		\
   ? __wuflow (_fp) : (wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
# define _IO_putwc_unlocked(_wch, _fp)					\
  (__glibc_unlikely ((_fp)->_wide_data == NULL				\
		     || ((_fp)->_wide_data->_IO_write_ptr		\
			 >= (_fp)->_wide_data->_IO_write_end))		\
   ? __woverflow (_fp, _wch)						\
   : (wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))

#define _IO_feof_unlocked(_fp) __feof_unlocked_body (_fp)
#define _IO_ferror_unlocked(_fp) __ferror_unlocked_body (_fp)

extern int _IO_getc (FILE *__fp);
extern int _IO_putc (int __c, FILE *__fp);
extern int _IO_feof (FILE *__fp) __THROW;
extern int _IO_ferror (FILE *__fp) __THROW;

extern int _IO_peekc_locked (FILE *__fp);

/* This one is for Emacs. */
#define _IO_PENDING_OUTPUT_COUNT(_fp)	\
	((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)

extern void _IO_flockfile (FILE *) __THROW;
extern void _IO_funlockfile (FILE *) __THROW;
extern int _IO_ftrylockfile (FILE *) __THROW;

#define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
#define _IO_flockfile(_fp) /**/
#define _IO_funlockfile(_fp) ((void) 0)
#define _IO_ftrylockfile(_fp) /**/
#ifndef _IO_cleanup_region_start
#define _IO_cleanup_region_start(_fct, _fp) /**/
#endif
#ifndef _IO_cleanup_region_end
#define _IO_cleanup_region_end(_Doit) /**/
#endif

#define _IO_need_lock(_fp) \
  (((_fp)->_flags2 & _IO_FLAGS2_NEED_LOCK) != 0)

extern int _IO_vfscanf (FILE * __restrict, const char * __restrict,
			__gnuc_va_list, int *__restrict);
extern __ssize_t _IO_padn (FILE *, int, __ssize_t);
extern size_t _IO_sgetn (FILE *, void *, size_t);

extern off64_t _IO_seekoff (FILE *, off64_t, int, int);
extern off64_t _IO_seekpos (FILE *, off64_t, int);

extern void _IO_free_backup_area (FILE *) __THROW;


extern wint_t _IO_getwc (FILE *__fp);
extern wint_t _IO_putwc (wchar_t __wc, FILE *__fp);
extern int _IO_fwide (FILE *__fp, int __mode) __THROW;

#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
#  define _IO_fwide_maybe_incompatible \
  (__glibc_unlikely (&_IO_stdin_used == NULL))
extern const int _IO_stdin_used;
weak_extern (_IO_stdin_used);
#else
# define _IO_fwide_maybe_incompatible (0)
#endif

/* A special optimized version of the function above.  It optimizes the
   case of initializing an unoriented byte stream.  */
#define _IO_fwide(__fp, __mode) \
  ({ int __result = (__mode);						      \
     if (__result < 0 && ! _IO_fwide_maybe_incompatible)		      \
       {								      \
	 if ((__fp)->_mode == 0)					      \
	   /* We know that all we have to do is to set the flag.  */	      \
	   (__fp)->_mode = -1;						      \
	 __result = (__fp)->_mode;					      \
       }								      \
     else if (__builtin_constant_p (__mode) && (__mode) == 0)		      \
       __result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode;	      \
     else								      \
       __result = _IO_fwide (__fp, __result);				      \
     __result; })

extern int _IO_vfwscanf (FILE * __restrict, const wchar_t * __restrict,
			 __gnuc_va_list, int *__restrict);
extern __ssize_t _IO_wpadn (FILE *, wint_t, __ssize_t);
extern void _IO_free_wbackup_area (FILE *) __THROW;

#ifdef __LDBL_COMPAT
__LDBL_REDIR_DECL (_IO_vfscanf)
#endif

libc_hidden_proto (__overflow)
libc_hidden_proto (__underflow)
libc_hidden_proto (__uflow)
libc_hidden_proto (__woverflow)
libc_hidden_proto (__wunderflow)
libc_hidden_proto (__wuflow)
libc_hidden_proto (_IO_free_backup_area)
libc_hidden_proto (_IO_free_wbackup_area)
libc_hidden_proto (_IO_padn)
libc_hidden_proto (_IO_putc)
libc_hidden_proto (_IO_sgetn)

#ifdef _IO_MTSAFE_IO
# undef _IO_peekc
# undef _IO_flockfile
# undef _IO_funlockfile
# undef _IO_ftrylockfile

# define _IO_peekc(_fp) _IO_peekc_locked (_fp)
# if _IO_lock_inexpensive
#  define _IO_flockfile(_fp) \
  if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_lock_lock (*(_fp)->_lock)
#  define _IO_funlockfile(_fp) \
  if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_lock_unlock (*(_fp)->_lock)
# else
#  define _IO_flockfile(_fp) \
  if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
#  define _IO_funlockfile(_fp) \
  if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
# endif
#endif /* _IO_MTSAFE_IO */

#endif /* _LIBIO_H */
Commit	Line	Data
2b778ceb	1	/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
48a8f832 ZW	2	This file is part of the GNU C Library.
	3	Written by Per Bothner <bothner@cygnus.com>.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, see
5a82c748	17	<https://www.gnu.org/licenses/>.
48a8f832 ZW	18
	19	As a special exception, if you link the code in this file with
	20	files compiled with a GNU compiler to produce an executable,
	21	that does not cause the resulting executable to be covered by
	22	the GNU Lesser General Public License. This exception does not
	23	however invalidate any other reasons why the executable file
	24	might be covered by the GNU Lesser General Public License.
	25	This exception applies to code released by its copyright holders
	26	in files containing the exception. */
	27
6c6c962a ZW	28	#ifndef _LIBIO_H
	29	#define _LIBIO_H 1
	30
	31	#ifndef _LIBC
	32	# error "libio.h should only be included when building glibc itself"
	33	#endif
	34	#ifdef _ISOMAC
	35	# error "libio.h should not be included under _ISOMAC"
	36	#endif
48a8f832	37
a4fea3f2	38	#include <stdio.h>
48a8f832	39
6c6c962a ZW	40	#if defined _IO_MTSAFE_IO && !defined _IO_lock_t_defined
	41	# error "Someone forgot to include stdio-lock.h"
	42	#endif
	43
63fb8f9a ZW	44	#define __need_wchar_t
	45	#include <stddef.h>
	46
	47	#include <bits/types/__mbstate_t.h>
	48	#include <bits/types/wint_t.h>
	49	#include <gconv.h>
	50
70c6e156	51	typedef struct
63fb8f9a	52	{
70c6e156 FW	53	struct __gconv_step *step;
70c6e156 FW	54	struct __gconv_step_data step_data;
63fb8f9a ZW	55	} _IO_iconv_t;
63fb8f9a ZW	56
6c6c962a ZW	57	#include <shlib-compat.h>
6c6c962a ZW	58
df6c012b	59	/* _IO_seekoff modes */
48a8f832 ZW	60	#define _IOS_INPUT 1
48a8f832 ZW	61	#define _IOS_OUTPUT 2
48a8f832	62
df6c012b ZW	63	/* Magic number and bits for the _flags field. The magic number is
	64	mostly vestigial, but preserved for compatibility. It occupies the
	65	high 16 bits of _flags; the low 16 bits are actual flag bits. */
	66
	67	#define _IO_MAGIC 0xFBAD0000 /* Magic number */
	68	#define _IO_MAGIC_MASK 0xFFFF0000
	69	#define _IO_USER_BUF 0x0001 /* Don't deallocate buffer on close. */
	70	#define _IO_UNBUFFERED 0x0002
	71	#define _IO_NO_READS 0x0004 /* Reading not allowed. */
	72	#define _IO_NO_WRITES 0x0008 /* Writing not allowed. */
	73	#define _IO_EOF_SEEN 0x0010
	74	#define _IO_ERR_SEEN 0x0020
	75	#define _IO_DELETE_DONT_CLOSE 0x0040 /* Don't call close(_fileno) on close. */
	76	#define _IO_LINKED 0x0080 /* In the list of all open files. */
	77	#define _IO_IN_BACKUP 0x0100
	78	#define _IO_LINE_BUF 0x0200
	79	#define _IO_TIED_PUT_GET 0x0400 /* Put and get pointer move in unison. */
	80	#define _IO_CURRENTLY_PUTTING 0x0800
	81	#define _IO_IS_APPENDING 0x1000
	82	#define _IO_IS_FILEBUF 0x2000
	83	/* 0x4000 No longer used, reserved for compat. */
	84	#define _IO_USER_LOCK 0x8000
	85
	86	/* Bits for the _flags2 field. */
48a8f832 ZW	87	#define _IO_FLAGS2_MMAP 1
48a8f832 ZW	88	#define _IO_FLAGS2_NOTCANCEL 2
48a8f832	89	#define _IO_FLAGS2_USER_WBUF 8
34957904 ZW	90	#define _IO_FLAGS2_NOCLOSE 32
	91	#define _IO_FLAGS2_CLOEXEC 64
	92	#define _IO_FLAGS2_NEED_LOCK 128
48a8f832	93
30bfee26 ZW	94	/* _IO_pos_BAD is an off64_t value indicating error, unknown, or EOF. */
	95	#define _IO_pos_BAD ((off64_t) -1)
	96
	97	/* _IO_pos_adjust adjusts an off64_t by some number of bytes. */
	98	#define _IO_pos_adjust(pos, delta) ((pos) += (delta))
	99
	100	/* _IO_pos_0 is an off64_t value indicating beginning of file. */
	101	#define _IO_pos_0 ((off64_t) 0)
48a8f832	102
a4fea3f2	103	struct _IO_jump_t;
48a8f832 ZW	104
48a8f832 ZW	105	/* A streammarker remembers a position in a buffer. */
48a8f832 ZW	106	struct _IO_marker {
48a8f832 ZW	107	struct _IO_marker *_next;
9964a145	108	FILE *_sbuf;
48a8f832 ZW	109	/* If _pos >= 0
	110	it points to _buf->Gbase()+_pos. FIXME comment */
	111	/* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
	112	int _pos;
48a8f832 ZW	113	};
48a8f832 ZW	114
48a8f832 ZW	115	struct _IO_codecvt
48a8f832 ZW	116	{
48a8f832 ZW	117	_IO_iconv_t __cd_in;
	118	_IO_iconv_t __cd_out;
	119	};
	120
	121	/* Extra data for wide character streams. */
	122	struct _IO_wide_data
	123	{
	124	wchar_t _IO_read_ptr; / Current read pointer */
	125	wchar_t _IO_read_end; / End of get area. */
	126	wchar_t _IO_read_base; / Start of putback+get area. */
	127	wchar_t _IO_write_base; / Start of put area. */
	128	wchar_t _IO_write_ptr; / Current put pointer. */
	129	wchar_t _IO_write_end; / End of put area. */
	130	wchar_t _IO_buf_base; / Start of reserve area. */
	131	wchar_t _IO_buf_end; / End of reserve area. */
	132	/* The following fields are used to support backing up and undo. */
	133	wchar_t _IO_save_base; / Pointer to start of non-current get area. */
	134	wchar_t _IO_backup_base; / Pointer to first valid character of
	135	backup area */
	136	wchar_t _IO_save_end; / Pointer to end of non-current get area. */
	137
	138	__mbstate_t _IO_state;
	139	__mbstate_t _IO_last_state;
	140	struct _IO_codecvt _codecvt;
	141
	142	wchar_t _shortbuf[1];
	143
	144	const struct _IO_jump_t *_wide_vtable;
	145	};
48a8f832	146
48a8f832 ZW	147	struct _IO_FILE_plus;
	148
	149	extern struct _IO_FILE_plus _IO_2_1_stdin_;
	150	extern struct _IO_FILE_plus _IO_2_1_stdout_;
	151	extern struct _IO_FILE_plus _IO_2_1_stderr_;
48a8f832 ZW	152
	153	struct _IO_cookie_file;
	154
	155	/* Initialize one of those. */
	156	extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
9964a145	157	void *__cookie, cookie_io_functions_t __fns);
48a8f832	158
9964a145 ZW	159	extern int __underflow (FILE *);
	160	extern wint_t __wunderflow (FILE *);
	161	extern wint_t __wuflow (FILE *);
	162	extern wint_t __woverflow (FILE *, wint_t);
48a8f832	163
a4fea3f2	164	#define _IO_getc_unlocked(_fp) __getc_unlocked_body (_fp)
177aad3f ZW	165	#define _IO_peekc_unlocked(_fp) \
	166	(__glibc_unlikely ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end) \
	167	&& __underflow (_fp) == EOF \
	168	? EOF \
	169	: (unsigned char ) (_fp)->_IO_read_ptr)
a4fea3f2	170	#define _IO_putc_unlocked(_ch, _fp) __putc_unlocked_body (_ch, _fp)
48a8f832	171
177aad3f ZW	172	# define _IO_getwc_unlocked(_fp) \
	173	(__glibc_unlikely ((_fp)->_wide_data == NULL \
	174	\|\| ((_fp)->_wide_data->_IO_read_ptr \
	175	>= (_fp)->_wide_data->_IO_read_end)) \
9964a145	176	? __wuflow (_fp) : (wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
177aad3f ZW	177	# define _IO_putwc_unlocked(_wch, _fp) \
	178	(__glibc_unlikely ((_fp)->_wide_data == NULL \
	179	\|\| ((_fp)->_wide_data->_IO_write_ptr \
	180	>= (_fp)->_wide_data->_IO_write_end)) \
48a8f832	181	? __woverflow (_fp, _wch) \
9964a145	182	: (wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
48a8f832	183
a4fea3f2 ZW	184	#define _IO_feof_unlocked(_fp) __feof_unlocked_body (_fp)
a4fea3f2 ZW	185	#define _IO_ferror_unlocked(_fp) __ferror_unlocked_body (_fp)
48a8f832	186
9964a145 ZW	187	extern int _IO_getc (FILE *__fp);
	188	extern int _IO_putc (int __c, FILE *__fp);
	189	extern int _IO_feof (FILE *__fp) __THROW;
	190	extern int _IO_ferror (FILE *__fp) __THROW;
48a8f832	191
9964a145	192	extern int _IO_peekc_locked (FILE *__fp);
48a8f832 ZW	193
	194	/* This one is for Emacs. */
	195	#define _IO_PENDING_OUTPUT_COUNT(_fp) \
	196	((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
	197
9964a145 ZW	198	extern void _IO_flockfile (FILE *) __THROW;
	199	extern void _IO_funlockfile (FILE *) __THROW;
	200	extern int _IO_ftrylockfile (FILE *) __THROW;
48a8f832 ZW	201
	202	#define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
	203	#define _IO_flockfile(_fp) /**/
05383720	204	#define _IO_funlockfile(_fp) ((void) 0)
48a8f832 ZW	205	#define _IO_ftrylockfile(_fp) /**/
	206	#ifndef _IO_cleanup_region_start
	207	#define _IO_cleanup_region_start(_fct, _fp) /**/
	208	#endif
	209	#ifndef _IO_cleanup_region_end
	210	#define _IO_cleanup_region_end(_Doit) /**/
	211	#endif
	212
	213	#define _IO_need_lock(_fp) \
	214	(((_fp)->_flags2 & _IO_FLAGS2_NEED_LOCK) != 0)
	215
9964a145 ZW	216	extern int _IO_vfscanf (FILE * __restrict, const char * __restrict,
9964a145 ZW	217	__gnuc_va_list, int *__restrict);
9964a145 ZW	218	extern __ssize_t _IO_padn (FILE *, int, __ssize_t);
9964a145 ZW	219	extern size_t _IO_sgetn (FILE , void , size_t);
48a8f832	220
9964a145 ZW	221	extern off64_t _IO_seekoff (FILE *, off64_t, int, int);
9964a145 ZW	222	extern off64_t _IO_seekpos (FILE *, off64_t, int);
48a8f832	223
9964a145	224	extern void _IO_free_backup_area (FILE *) __THROW;
48a8f832	225
6c6c962a	226
9964a145 ZW	227	extern wint_t _IO_getwc (FILE *__fp);
	228	extern wint_t _IO_putwc (wchar_t __wc, FILE *__fp);
	229	extern int _IO_fwide (FILE *__fp, int __mode) __THROW;
6c6c962a	230
6c6c962a ZW	231	#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
6c6c962a ZW	232	# define _IO_fwide_maybe_incompatible \
177aad3f	233	(__glibc_unlikely (&_IO_stdin_used == NULL))
48a8f832 ZW	234	extern const int _IO_stdin_used;
48a8f832 ZW	235	weak_extern (_IO_stdin_used);
6c6c962a ZW	236	#else
	237	# define _IO_fwide_maybe_incompatible (0)
	238	#endif
	239
48a8f832 ZW	240	/* A special optimized version of the function above. It optimizes the
48a8f832 ZW	241	case of initializing an unoriented byte stream. */
6c6c962a	242	#define _IO_fwide(__fp, __mode) \
48a8f832 ZW	243	({ int __result = (__mode); \
	244	if (__result < 0 && ! _IO_fwide_maybe_incompatible) \
	245	{ \
	246	if ((__fp)->_mode == 0) \
	247	/* We know that all we have to do is to set the flag. */ \
	248	(__fp)->_mode = -1; \
	249	__result = (__fp)->_mode; \
	250	} \
	251	else if (__builtin_constant_p (__mode) && (__mode) == 0) \
	252	__result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode; \
	253	else \
	254	__result = _IO_fwide (__fp, __result); \
	255	__result; })
48a8f832	256
9964a145 ZW	257	extern int _IO_vfwscanf (FILE * __restrict, const wchar_t * __restrict,
9964a145 ZW	258	__gnuc_va_list, int *__restrict);
9964a145 ZW	259	extern __ssize_t _IO_wpadn (FILE *, wint_t, __ssize_t);
9964a145 ZW	260	extern void _IO_free_wbackup_area (FILE *) __THROW;
48a8f832 ZW	261
48a8f832 ZW	262	#ifdef __LDBL_COMPAT
6c6c962a	263	__LDBL_REDIR_DECL (_IO_vfscanf)
48a8f832 ZW	264	#endif
48a8f832 ZW	265
6c6c962a ZW	266	libc_hidden_proto (__overflow)
	267	libc_hidden_proto (__underflow)
	268	libc_hidden_proto (__uflow)
	269	libc_hidden_proto (__woverflow)
	270	libc_hidden_proto (__wunderflow)
	271	libc_hidden_proto (__wuflow)
	272	libc_hidden_proto (_IO_free_backup_area)
	273	libc_hidden_proto (_IO_free_wbackup_area)
	274	libc_hidden_proto (_IO_padn)
	275	libc_hidden_proto (_IO_putc)
	276	libc_hidden_proto (_IO_sgetn)
6c6c962a ZW	277
	278	#ifdef _IO_MTSAFE_IO
	279	# undef _IO_peekc
	280	# undef _IO_flockfile
	281	# undef _IO_funlockfile
	282	# undef _IO_ftrylockfile
	283
	284	# define _IO_peekc(_fp) _IO_peekc_locked (_fp)
	285	# if _IO_lock_inexpensive
	286	# define _IO_flockfile(_fp) \
	287	if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_lock_lock (*(_fp)->_lock)
	288	# define _IO_funlockfile(_fp) \
	289	if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_lock_unlock (*(_fp)->_lock)
	290	# else
	291	# define _IO_flockfile(_fp) \
	292	if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
	293	# define _IO_funlockfile(_fp) \
	294	if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
	295	# endif
	296	#endif /* _IO_MTSAFE_IO */
	297
6c6c962a	298	#endif /* _LIBIO_H */