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diff --git a/libio/libio.h b/libio/libio.h
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-/* Copyright (C) 1991-2017 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 _IO_STDIO_H
-#define _IO_STDIO_H
-
-#include <_G_config.h>
-/* ALL of these should be defined in _G_config.h */
-#define _IO_fpos_t _G_fpos_t
-#define _IO_fpos64_t _G_fpos64_t
-#define _IO_size_t size_t
-#define _IO_ssize_t __ssize_t
-#define _IO_off_t __off_t
-#define _IO_off64_t __off64_t
-#define _IO_pid_t __pid_t
-#define _IO_uid_t __uid_t
-#define _IO_iconv_t _G_iconv_t
-#define _IO_HAVE_ST_BLKSIZE _G_HAVE_ST_BLKSIZE
-#define _IO_BUFSIZ _G_BUFSIZ
-#define _IO_va_list _G_va_list
-#define _IO_wint_t wint_t
-
-/* This define avoids name pollution if we're using GNU stdarg.h */
-#define __need___va_list
-#include <stdarg.h>
-#ifdef __GNUC_VA_LIST
-# undef _IO_va_list
-# define _IO_va_list __gnuc_va_list
-#endif /* __GNUC_VA_LIST */
-
-#ifndef __P
-# include <sys/cdefs.h>
-#endif /*!__P*/
-
-#define _IO_UNIFIED_JUMPTABLES 1
-
-#ifndef EOF
-# define EOF (-1)
-#endif
-#ifndef NULL
-# if defined __GNUG__ && \
- (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
-# define NULL (__null)
-# else
-# if !defined(__cplusplus)
-# define NULL ((void*)0)
-# else
-# define NULL (0)
-# endif
-# endif
-#endif
-
-#define _IOS_INPUT 1
-#define _IOS_OUTPUT 2
-#define _IOS_ATEND 4
-#define _IOS_APPEND 8
-#define _IOS_TRUNC 16
-#define _IOS_NOCREATE 32
-#define _IOS_NOREPLACE 64
-#define _IOS_BIN 128
-
-/* Magic numbers and bits for the _flags field.
- The magic numbers use the high-order bits of _flags;
- the remaining bits are available for variable flags.
- Note: The magic numbers must all be negative if stdio
- emulation is desired. */
-
-#define _IO_MAGIC 0xFBAD0000 /* Magic number */
-#define _OLD_STDIO_MAGIC 0xFABC0000 /* Emulate old stdio. */
-#define _IO_MAGIC_MASK 0xFFFF0000
-#define _IO_USER_BUF 1 /* User owns buffer; don't delete it on close. */
-#define _IO_UNBUFFERED 2
-#define _IO_NO_READS 4 /* Reading not allowed */
-#define _IO_NO_WRITES 8 /* Writing not allowd */
-#define _IO_EOF_SEEN 0x10
-#define _IO_ERR_SEEN 0x20
-#define _IO_DELETE_DONT_CLOSE 0x40 /* Don't call close(_fileno) on cleanup. */
-#define _IO_LINKED 0x80 /* Set if linked (using _chain) to streambuf::_list_all.*/
-#define _IO_IN_BACKUP 0x100
-#define _IO_LINE_BUF 0x200
-#define _IO_TIED_PUT_GET 0x400 /* Set if put and get pointer logicly tied. */
-#define _IO_CURRENTLY_PUTTING 0x800
-#define _IO_IS_APPENDING 0x1000
-#define _IO_IS_FILEBUF 0x2000
-#define _IO_BAD_SEEN 0x4000
-#define _IO_USER_LOCK 0x8000
-
-#define _IO_FLAGS2_MMAP 1
-#define _IO_FLAGS2_NOTCANCEL 2
-#ifdef _LIBC
-# define _IO_FLAGS2_FORTIFY 4
-#endif
-#define _IO_FLAGS2_USER_WBUF 8
-#ifdef _LIBC
-# define _IO_FLAGS2_SCANF_STD 16
-# define _IO_FLAGS2_NOCLOSE 32
-# define _IO_FLAGS2_CLOEXEC 64
-#endif
-
-/* These are "formatting flags" matching the iostream fmtflags enum values. */
-#define _IO_SKIPWS 01
-#define _IO_LEFT 02
-#define _IO_RIGHT 04
-#define _IO_INTERNAL 010
-#define _IO_DEC 020
-#define _IO_OCT 040
-#define _IO_HEX 0100
-#define _IO_SHOWBASE 0200
-#define _IO_SHOWPOINT 0400
-#define _IO_UPPERCASE 01000
-#define _IO_SHOWPOS 02000
-#define _IO_SCIENTIFIC 04000
-#define _IO_FIXED 010000
-#define _IO_UNITBUF 020000
-#define _IO_STDIO 040000
-#define _IO_DONT_CLOSE 0100000
-#define _IO_BOOLALPHA 0200000
-
-
-struct _IO_jump_t; struct _IO_FILE;
-
-/* During the build of glibc itself, _IO_lock_t will already have been
- defined by internal headers. */
-#ifndef _IO_lock_t_defined
-typedef void _IO_lock_t;
-#endif
-
-
-/* A streammarker remembers a position in a buffer. */
-
-struct _IO_marker {
- struct _IO_marker *_next;
- struct _IO_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;
-#if 0
- void set_streampos(streampos sp) { _spos = sp; }
- void set_offset(int offset) { _pos = offset; _spos = (streampos)(-2); }
- public:
- streammarker(streambuf *sb);
- ~streammarker();
- int saving() { return _spos == -2; }
- int delta(streammarker&);
- int delta();
-#endif
-};
-
-/* This is the structure from the libstdc++ codecvt class. */
-enum __codecvt_result
-{
- __codecvt_ok,
- __codecvt_partial,
- __codecvt_error,
- __codecvt_noconv
-};
-
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-/* 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 *, _IO_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;
-};
-#endif
-
-struct _IO_FILE {
- int _flags; /* High-order word is _IO_MAGIC; rest is flags. */
-#define _IO_file_flags _flags
-
- /* The following pointers correspond to the C++ streambuf protocol. */
- /* Note: Tk uses the _IO_read_ptr and _IO_read_end fields directly. */
- char* _IO_read_ptr; /* Current read pointer */
- char* _IO_read_end; /* End of get area. */
- char* _IO_read_base; /* Start of putback+get area. */
- char* _IO_write_base; /* Start of put area. */
- char* _IO_write_ptr; /* Current put pointer. */
- char* _IO_write_end; /* End of put area. */
- char* _IO_buf_base; /* Start of reserve area. */
- char* _IO_buf_end; /* End of reserve area. */
- /* The following fields are used to support backing up and undo. */
- char *_IO_save_base; /* Pointer to start of non-current get area. */
- char *_IO_backup_base; /* Pointer to first valid character of backup area */
- char *_IO_save_end; /* Pointer to end of non-current get area. */
-
- struct _IO_marker *_markers;
-
- struct _IO_FILE *_chain;
-
- int _fileno;
-#if 0
- int _blksize;
-#else
- int _flags2;
-#endif
- _IO_off_t _old_offset; /* This used to be _offset but it's too small. */
-
-#define __HAVE_COLUMN /* temporary */
- /* 1+column number of pbase(); 0 is unknown. */
- unsigned short _cur_column;
- signed char _vtable_offset;
- char _shortbuf[1];
-
- /* char* _save_gptr; char* _save_egptr; */
-
- _IO_lock_t *_lock;
-#ifdef _IO_USE_OLD_IO_FILE
-};
-
-struct _IO_FILE_complete
-{
- struct _IO_FILE _file;
-#endif
-#if defined _G_IO_IO_FILE_VERSION && _G_IO_IO_FILE_VERSION == 0x20001
- _IO_off64_t _offset;
-# if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
- /* Wide character stream stuff. */
- struct _IO_codecvt *_codecvt;
- struct _IO_wide_data *_wide_data;
- struct _IO_FILE *_freeres_list;
- void *_freeres_buf;
-# else
- void *__pad1;
- void *__pad2;
- void *__pad3;
- void *__pad4;
-# endif
- size_t __pad5;
- int _mode;
- /* Make sure we don't get into trouble again. */
- char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
-#endif
-};
-
-#ifndef __cplusplus
-typedef struct _IO_FILE _IO_FILE;
-#endif
-
-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_;
-#ifndef _LIBC
-#define _IO_stdin ((_IO_FILE*)(&_IO_2_1_stdin_))
-#define _IO_stdout ((_IO_FILE*)(&_IO_2_1_stdout_))
-#define _IO_stderr ((_IO_FILE*)(&_IO_2_1_stderr_))
-#else
-extern _IO_FILE *_IO_stdin attribute_hidden;
-extern _IO_FILE *_IO_stdout attribute_hidden;
-extern _IO_FILE *_IO_stderr attribute_hidden;
-#endif
-
-
-/* Functions to do I/O and file management for a stream. */
-
-/* Read NBYTES bytes from COOKIE into a buffer pointed to by BUF.
- Return number of bytes read. */
-typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
-
-/* Write N bytes pointed to by BUF to COOKIE. Write all N bytes
- unless there is an error. Return number of bytes written. If
- there is an error, return 0 and do not write anything. If the file
- has been opened for append (__mode.__append set), then set the file
- pointer to the end of the file and then do the write; if not, just
- write at the current file pointer. */
-typedef __ssize_t __io_write_fn (void *__cookie, const char *__buf,
- size_t __n);
-
-/* Move COOKIE's file position to *POS bytes from the
- beginning of the file (if W is SEEK_SET),
- the current position (if W is SEEK_CUR),
- or the end of the file (if W is SEEK_END).
- Set *POS to the new file position.
- Returns zero if successful, nonzero if not. */
-typedef int __io_seek_fn (void *__cookie, _IO_off64_t *__pos, int __w);
-
-/* Close COOKIE. */
-typedef int __io_close_fn (void *__cookie);
-
-
-#ifdef __USE_GNU
-/* User-visible names for the above. */
-typedef __io_read_fn cookie_read_function_t;
-typedef __io_write_fn cookie_write_function_t;
-typedef __io_seek_fn cookie_seek_function_t;
-typedef __io_close_fn cookie_close_function_t;
-
-/* The structure with the cookie function pointers. */
-typedef struct
-{
- __io_read_fn *read; /* Read bytes. */
- __io_write_fn *write; /* Write bytes. */
- __io_seek_fn *seek; /* Seek/tell file position. */
- __io_close_fn *close; /* Close file. */
-} _IO_cookie_io_functions_t;
-typedef _IO_cookie_io_functions_t cookie_io_functions_t;
-
-struct _IO_cookie_file;
-
-/* Initialize one of those. */
-extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
- void *__cookie, _IO_cookie_io_functions_t __fns);
-#endif
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-extern int __underflow (_IO_FILE *);
-extern int __uflow (_IO_FILE *);
-extern int __overflow (_IO_FILE *, int);
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-extern _IO_wint_t __wunderflow (_IO_FILE *);
-extern _IO_wint_t __wuflow (_IO_FILE *);
-extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t);
-#endif
-
-#if __GNUC__ >= 3
-# define _IO_BE(expr, res) __builtin_expect ((expr), res)
-#else
-# define _IO_BE(expr, res) (expr)
-#endif
-
-#define _IO_getc_unlocked(_fp) \
- (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
- ? __uflow (_fp) : *(unsigned char *) (_fp)->_IO_read_ptr++)
-#define _IO_peekc_unlocked(_fp) \
- (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
- && __underflow (_fp) == EOF ? EOF \
- : *(unsigned char *) (_fp)->_IO_read_ptr)
-#define _IO_putc_unlocked(_ch, _fp) \
- (_IO_BE ((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end, 0) \
- ? __overflow (_fp, (unsigned char) (_ch)) \
- : (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch)))
-
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-# define _IO_getwc_unlocked(_fp) \
- (_IO_BE ((_fp)->_wide_data == NULL \
- || ((_fp)->_wide_data->_IO_read_ptr \
- >= (_fp)->_wide_data->_IO_read_end), 0) \
- ? __wuflow (_fp) : (_IO_wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
-# define _IO_putwc_unlocked(_wch, _fp) \
- (_IO_BE ((_fp)->_wide_data == NULL \
- || ((_fp)->_wide_data->_IO_write_ptr \
- >= (_fp)->_wide_data->_IO_write_end), 0) \
- ? __woverflow (_fp, _wch) \
- : (_IO_wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
-#endif
-
-#define _IO_feof_unlocked(__fp) (((__fp)->_flags & _IO_EOF_SEEN) != 0)
-#define _IO_ferror_unlocked(__fp) (((__fp)->_flags & _IO_ERR_SEEN) != 0)
-
-extern int _IO_getc (_IO_FILE *__fp);
-extern int _IO_putc (int __c, _IO_FILE *__fp);
-extern int _IO_feof (_IO_FILE *__fp) __THROW;
-extern int _IO_ferror (_IO_FILE *__fp) __THROW;
-
-extern int _IO_peekc_locked (_IO_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 (_IO_FILE *) __THROW;
-extern void _IO_funlockfile (_IO_FILE *) __THROW;
-extern int _IO_ftrylockfile (_IO_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
-
-extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
- _IO_va_list, int *__restrict);
-extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
- _IO_va_list);
-extern _IO_ssize_t _IO_padn (_IO_FILE *, int, _IO_ssize_t);
-extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t);
-
-extern _IO_off64_t _IO_seekoff (_IO_FILE *, _IO_off64_t, int, int);
-extern _IO_off64_t _IO_seekpos (_IO_FILE *, _IO_off64_t, int);
-
-extern void _IO_free_backup_area (_IO_FILE *) __THROW;
-
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-extern _IO_wint_t _IO_getwc (_IO_FILE *__fp);
-extern _IO_wint_t _IO_putwc (wchar_t __wc, _IO_FILE *__fp);
-extern int _IO_fwide (_IO_FILE *__fp, int __mode) __THROW;
-# if __GNUC__ >= 2
-/* While compiling glibc we have to handle compatibility with very old
- versions. */
-# if defined _LIBC && defined SHARED
-# include <shlib-compat.h>
-# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
-# define _IO_fwide_maybe_incompatible \
- (__builtin_expect (&_IO_stdin_used == NULL, 0))
-extern const int _IO_stdin_used;
-weak_extern (_IO_stdin_used);
-# endif
-# endif
-# ifndef _IO_fwide_maybe_incompatible
-# 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; })
-# endif
-
-extern int _IO_vfwscanf (_IO_FILE * __restrict, const wchar_t * __restrict,
- _IO_va_list, int *__restrict);
-extern int _IO_vfwprintf (_IO_FILE *__restrict, const wchar_t *__restrict,
- _IO_va_list);
-extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t);
-extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
-#endif
-
-#ifdef __LDBL_COMPAT
-# include <bits/libio-ldbl.h>
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _IO_STDIO_H */
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