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

/* Copyright (C) 1991-2018 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
   <http://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 union
{
  struct __gconv_info __cd;
  struct
  {
    struct __gconv_info __cd;
    struct __gconv_step_data __data;
  } __combined;
} _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;
};

/* This is the structure from the libstdc++ codecvt class.  */
enum __codecvt_result
{
  __codecvt_ok,
  __codecvt_partial,
  __codecvt_error,
  __codecvt_noconv
};

/* The order of the elements in the following struct must match the order
   of the virtual functions in the libstdc++ codecvt class.  */
struct _IO_codecvt
{
  void (*__codecvt_destr) (struct _IO_codecvt *);
  enum __codecvt_result (*__codecvt_do_out) (struct _IO_codecvt *,
					     __mbstate_t *,
					     const wchar_t *,
					     const wchar_t *,
					     const wchar_t **, char *,
					     char *, char **);
  enum __codecvt_result (*__codecvt_do_unshift) (struct _IO_codecvt *,
						 __mbstate_t *, char *,
						 char *, char **);
  enum __codecvt_result (*__codecvt_do_in) (struct _IO_codecvt *,
					    __mbstate_t *,
					    const char *, const char *,
					    const char **, wchar_t *,
					    wchar_t *, wchar_t **);
  int (*__codecvt_do_encoding) (struct _IO_codecvt *);
  int (*__codecvt_do_always_noconv) (struct _IO_codecvt *);
  int (*__codecvt_do_length) (struct _IO_codecvt *, __mbstate_t *,
			      const char *, const char *, size_t);
  int (*__codecvt_do_max_length) (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_;
extern FILE *_IO_stdin attribute_hidden;
extern FILE *_IO_stdout attribute_hidden;
extern FILE *_IO_stderr attribute_hidden;

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) /**/
#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)
__LDBL_REDIR_DECL (_IO_vfprintf)
#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
688903eb	1	/* Copyright (C) 1991-2018 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
	17	<http://www.gnu.org/licenses/>.
	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
	51	typedef union
	52	{
	53	struct __gconv_info __cd;
	54	struct
	55	{
	56	struct __gconv_info __cd;
	57	struct __gconv_step_data __data;
	58	} __combined;
	59	} _IO_iconv_t;
	60
6c6c962a ZW	61	#include <shlib-compat.h>
6c6c962a ZW	62
df6c012b	63	/* _IO_seekoff modes */
48a8f832 ZW	64	#define _IOS_INPUT 1
48a8f832 ZW	65	#define _IOS_OUTPUT 2
48a8f832	66
df6c012b ZW	67	/* Magic number and bits for the _flags field. The magic number is
	68	mostly vestigial, but preserved for compatibility. It occupies the
	69	high 16 bits of _flags; the low 16 bits are actual flag bits. */
	70
	71	#define _IO_MAGIC 0xFBAD0000 /* Magic number */
	72	#define _IO_MAGIC_MASK 0xFFFF0000
	73	#define _IO_USER_BUF 0x0001 /* Don't deallocate buffer on close. */
	74	#define _IO_UNBUFFERED 0x0002
	75	#define _IO_NO_READS 0x0004 /* Reading not allowed. */
	76	#define _IO_NO_WRITES 0x0008 /* Writing not allowed. */
	77	#define _IO_EOF_SEEN 0x0010
	78	#define _IO_ERR_SEEN 0x0020
	79	#define _IO_DELETE_DONT_CLOSE 0x0040 /* Don't call close(_fileno) on close. */
	80	#define _IO_LINKED 0x0080 /* In the list of all open files. */
	81	#define _IO_IN_BACKUP 0x0100
	82	#define _IO_LINE_BUF 0x0200
	83	#define _IO_TIED_PUT_GET 0x0400 /* Put and get pointer move in unison. */
	84	#define _IO_CURRENTLY_PUTTING 0x0800
	85	#define _IO_IS_APPENDING 0x1000
	86	#define _IO_IS_FILEBUF 0x2000
	87	/* 0x4000 No longer used, reserved for compat. */
	88	#define _IO_USER_LOCK 0x8000
	89
	90	/* Bits for the _flags2 field. */
48a8f832 ZW	91	#define _IO_FLAGS2_MMAP 1
48a8f832 ZW	92	#define _IO_FLAGS2_NOTCANCEL 2
48a8f832	93	#define _IO_FLAGS2_USER_WBUF 8
34957904 ZW	94	#define _IO_FLAGS2_NOCLOSE 32
	95	#define _IO_FLAGS2_CLOEXEC 64
	96	#define _IO_FLAGS2_NEED_LOCK 128
48a8f832	97
30bfee26 ZW	98	/* _IO_pos_BAD is an off64_t value indicating error, unknown, or EOF. */
	99	#define _IO_pos_BAD ((off64_t) -1)
	100
	101	/* _IO_pos_adjust adjusts an off64_t by some number of bytes. */
	102	#define _IO_pos_adjust(pos, delta) ((pos) += (delta))
	103
	104	/* _IO_pos_0 is an off64_t value indicating beginning of file. */
	105	#define _IO_pos_0 ((off64_t) 0)
48a8f832	106
a4fea3f2	107	struct _IO_jump_t;
48a8f832 ZW	108
48a8f832 ZW	109	/* A streammarker remembers a position in a buffer. */
48a8f832 ZW	110	struct _IO_marker {
48a8f832 ZW	111	struct _IO_marker *_next;
9964a145	112	FILE *_sbuf;
48a8f832 ZW	113	/* If _pos >= 0
	114	it points to _buf->Gbase()+_pos. FIXME comment */
	115	/* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
	116	int _pos;
48a8f832 ZW	117	};
	118
	119	/* This is the structure from the libstdc++ codecvt class. */
	120	enum __codecvt_result
	121	{
	122	__codecvt_ok,
	123	__codecvt_partial,
	124	__codecvt_error,
	125	__codecvt_noconv
	126	};
	127
48a8f832 ZW	128	/* The order of the elements in the following struct must match the order
	129	of the virtual functions in the libstdc++ codecvt class. */
	130	struct _IO_codecvt
	131	{
	132	void (__codecvt_destr) (struct _IO_codecvt );
	133	enum __codecvt_result (__codecvt_do_out) (struct _IO_codecvt ,
	134	__mbstate_t *,
	135	const wchar_t *,
	136	const wchar_t *,
	137	const wchar_t *, char ,
	138	char , char *);
	139	enum __codecvt_result (__codecvt_do_unshift) (struct _IO_codecvt ,
	140	__mbstate_t , char ,
	141	char , char *);
	142	enum __codecvt_result (__codecvt_do_in) (struct _IO_codecvt ,
	143	__mbstate_t *,
	144	const char , const char ,
	145	const char *, wchar_t ,
	146	wchar_t , wchar_t *);
	147	int (__codecvt_do_encoding) (struct _IO_codecvt );
	148	int (__codecvt_do_always_noconv) (struct _IO_codecvt );
	149	int (__codecvt_do_length) (struct _IO_codecvt , __mbstate_t *,
9964a145	150	const char , const char , size_t);
48a8f832 ZW	151	int (__codecvt_do_max_length) (struct _IO_codecvt );
	152
	153	_IO_iconv_t __cd_in;
	154	_IO_iconv_t __cd_out;
	155	};
	156
	157	/* Extra data for wide character streams. */
	158	struct _IO_wide_data
	159	{
	160	wchar_t _IO_read_ptr; / Current read pointer */
	161	wchar_t _IO_read_end; / End of get area. */
	162	wchar_t _IO_read_base; / Start of putback+get area. */
	163	wchar_t _IO_write_base; / Start of put area. */
	164	wchar_t _IO_write_ptr; / Current put pointer. */
	165	wchar_t _IO_write_end; / End of put area. */
	166	wchar_t _IO_buf_base; / Start of reserve area. */
	167	wchar_t _IO_buf_end; / End of reserve area. */
	168	/* The following fields are used to support backing up and undo. */
	169	wchar_t _IO_save_base; / Pointer to start of non-current get area. */
	170	wchar_t _IO_backup_base; / Pointer to first valid character of
	171	backup area */
	172	wchar_t _IO_save_end; / Pointer to end of non-current get area. */
	173
	174	__mbstate_t _IO_state;
	175	__mbstate_t _IO_last_state;
	176	struct _IO_codecvt _codecvt;
	177
	178	wchar_t _shortbuf[1];
	179
	180	const struct _IO_jump_t *_wide_vtable;
	181	};
48a8f832	182
48a8f832 ZW	183	struct _IO_FILE_plus;
	184
	185	extern struct _IO_FILE_plus _IO_2_1_stdin_;
	186	extern struct _IO_FILE_plus _IO_2_1_stdout_;
	187	extern struct _IO_FILE_plus _IO_2_1_stderr_;
9964a145 ZW	188	extern FILE *_IO_stdin attribute_hidden;
	189	extern FILE *_IO_stdout attribute_hidden;
	190	extern FILE *_IO_stderr attribute_hidden;
48a8f832 ZW	191
	192	struct _IO_cookie_file;
	193
	194	/* Initialize one of those. */
	195	extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
9964a145	196	void *__cookie, cookie_io_functions_t __fns);
48a8f832	197
9964a145 ZW	198	extern int __underflow (FILE *);
	199	extern wint_t __wunderflow (FILE *);
	200	extern wint_t __wuflow (FILE *);
	201	extern wint_t __woverflow (FILE *, wint_t);
48a8f832	202
a4fea3f2	203	#define _IO_getc_unlocked(_fp) __getc_unlocked_body (_fp)
177aad3f ZW	204	#define _IO_peekc_unlocked(_fp) \
	205	(__glibc_unlikely ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end) \
	206	&& __underflow (_fp) == EOF \
	207	? EOF \
	208	: (unsigned char ) (_fp)->_IO_read_ptr)
a4fea3f2	209	#define _IO_putc_unlocked(_ch, _fp) __putc_unlocked_body (_ch, _fp)
48a8f832	210
177aad3f ZW	211	# define _IO_getwc_unlocked(_fp) \
	212	(__glibc_unlikely ((_fp)->_wide_data == NULL \
	213	\|\| ((_fp)->_wide_data->_IO_read_ptr \
	214	>= (_fp)->_wide_data->_IO_read_end)) \
9964a145	215	? __wuflow (_fp) : (wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
177aad3f ZW	216	# define _IO_putwc_unlocked(_wch, _fp) \
	217	(__glibc_unlikely ((_fp)->_wide_data == NULL \
	218	\|\| ((_fp)->_wide_data->_IO_write_ptr \
	219	>= (_fp)->_wide_data->_IO_write_end)) \
48a8f832	220	? __woverflow (_fp, _wch) \
9964a145	221	: (wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
48a8f832	222
a4fea3f2 ZW	223	#define _IO_feof_unlocked(_fp) __feof_unlocked_body (_fp)
a4fea3f2 ZW	224	#define _IO_ferror_unlocked(_fp) __ferror_unlocked_body (_fp)
48a8f832	225
9964a145 ZW	226	extern int _IO_getc (FILE *__fp);
	227	extern int _IO_putc (int __c, FILE *__fp);
	228	extern int _IO_feof (FILE *__fp) __THROW;
	229	extern int _IO_ferror (FILE *__fp) __THROW;
48a8f832	230
9964a145	231	extern int _IO_peekc_locked (FILE *__fp);
48a8f832 ZW	232
	233	/* This one is for Emacs. */
	234	#define _IO_PENDING_OUTPUT_COUNT(_fp) \
	235	((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
	236
9964a145 ZW	237	extern void _IO_flockfile (FILE *) __THROW;
	238	extern void _IO_funlockfile (FILE *) __THROW;
	239	extern int _IO_ftrylockfile (FILE *) __THROW;
48a8f832 ZW	240
	241	#define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
	242	#define _IO_flockfile(_fp) /**/
	243	#define _IO_funlockfile(_fp) /**/
	244	#define _IO_ftrylockfile(_fp) /**/
	245	#ifndef _IO_cleanup_region_start
	246	#define _IO_cleanup_region_start(_fct, _fp) /**/
	247	#endif
	248	#ifndef _IO_cleanup_region_end
	249	#define _IO_cleanup_region_end(_Doit) /**/
	250	#endif
	251
	252	#define _IO_need_lock(_fp) \
	253	(((_fp)->_flags2 & _IO_FLAGS2_NEED_LOCK) != 0)
	254
9964a145 ZW	255	extern int _IO_vfscanf (FILE * __restrict, const char * __restrict,
9964a145 ZW	256	__gnuc_va_list, int *__restrict);
9964a145 ZW	257	extern __ssize_t _IO_padn (FILE *, int, __ssize_t);
9964a145 ZW	258	extern size_t _IO_sgetn (FILE , void , size_t);
48a8f832	259
9964a145 ZW	260	extern off64_t _IO_seekoff (FILE *, off64_t, int, int);
9964a145 ZW	261	extern off64_t _IO_seekpos (FILE *, off64_t, int);
48a8f832	262
9964a145	263	extern void _IO_free_backup_area (FILE *) __THROW;
48a8f832	264
6c6c962a	265
9964a145 ZW	266	extern wint_t _IO_getwc (FILE *__fp);
	267	extern wint_t _IO_putwc (wchar_t __wc, FILE *__fp);
	268	extern int _IO_fwide (FILE *__fp, int __mode) __THROW;
6c6c962a	269
6c6c962a ZW	270	#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
6c6c962a ZW	271	# define _IO_fwide_maybe_incompatible \
177aad3f	272	(__glibc_unlikely (&_IO_stdin_used == NULL))
48a8f832 ZW	273	extern const int _IO_stdin_used;
48a8f832 ZW	274	weak_extern (_IO_stdin_used);
6c6c962a ZW	275	#else
	276	# define _IO_fwide_maybe_incompatible (0)
	277	#endif
	278
48a8f832 ZW	279	/* A special optimized version of the function above. It optimizes the
48a8f832 ZW	280	case of initializing an unoriented byte stream. */
6c6c962a	281	#define _IO_fwide(__fp, __mode) \
48a8f832 ZW	282	({ int __result = (__mode); \
	283	if (__result < 0 && ! _IO_fwide_maybe_incompatible) \
	284	{ \
	285	if ((__fp)->_mode == 0) \
	286	/* We know that all we have to do is to set the flag. */ \
	287	(__fp)->_mode = -1; \
	288	__result = (__fp)->_mode; \
	289	} \
	290	else if (__builtin_constant_p (__mode) && (__mode) == 0) \
	291	__result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode; \
	292	else \
	293	__result = _IO_fwide (__fp, __result); \
	294	__result; })
48a8f832	295
9964a145 ZW	296	extern int _IO_vfwscanf (FILE * __restrict, const wchar_t * __restrict,
9964a145 ZW	297	__gnuc_va_list, int *__restrict);
9964a145 ZW	298	extern __ssize_t _IO_wpadn (FILE *, wint_t, __ssize_t);
9964a145 ZW	299	extern void _IO_free_wbackup_area (FILE *) __THROW;
48a8f832 ZW	300
48a8f832 ZW	301	#ifdef __LDBL_COMPAT
6c6c962a ZW	302	__LDBL_REDIR_DECL (_IO_vfscanf)
6c6c962a ZW	303	__LDBL_REDIR_DECL (_IO_vfprintf)
48a8f832 ZW	304	#endif
48a8f832 ZW	305
6c6c962a ZW	306	libc_hidden_proto (__overflow)
	307	libc_hidden_proto (__underflow)
	308	libc_hidden_proto (__uflow)
	309	libc_hidden_proto (__woverflow)
	310	libc_hidden_proto (__wunderflow)
	311	libc_hidden_proto (__wuflow)
	312	libc_hidden_proto (_IO_free_backup_area)
	313	libc_hidden_proto (_IO_free_wbackup_area)
	314	libc_hidden_proto (_IO_padn)
	315	libc_hidden_proto (_IO_putc)
	316	libc_hidden_proto (_IO_sgetn)
6c6c962a ZW	317
	318	#ifdef _IO_MTSAFE_IO
	319	# undef _IO_peekc
	320	# undef _IO_flockfile
	321	# undef _IO_funlockfile
	322	# undef _IO_ftrylockfile
	323
	324	# define _IO_peekc(_fp) _IO_peekc_locked (_fp)
	325	# if _IO_lock_inexpensive
	326	# define _IO_flockfile(_fp) \
	327	if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_lock_lock (*(_fp)->_lock)
	328	# define _IO_funlockfile(_fp) \
	329	if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_lock_unlock (*(_fp)->_lock)
	330	# else
	331	# define _IO_flockfile(_fp) \
	332	if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
	333	# define _IO_funlockfile(_fp) \
	334	if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
	335	# endif
	336	#endif /* _IO_MTSAFE_IO */
	337
6c6c962a	338	#endif /* _LIBIO_H */