libio.h
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- /* Copyright (C) 1991-1995, 1997-2003, 2004 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA.
- 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_pos_t _G_fpos_t /* obsolete */
- #define _IO_fpos_t _G_fpos_t
- #define _IO_fpos64_t _G_fpos64_t
- #define _IO_size_t _G_size_t
- #define _IO_ssize_t _G_ssize_t
- #define _IO_off_t _G_off_t
- #define _IO_off64_t _G_off64_t
- #define _IO_pid_t _G_pid_t
- #define _IO_uid_t _G_uid_t
- #define _IO_iconv_t _G_iconv_t
- #define _IO_HAVE_SYS_WAIT _G_HAVE_SYS_WAIT
- #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 _G_wint_t
- #ifdef _G_NEED_STDARG_H
- /* 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 */
- #endif
- #ifndef __P
- # if _G_HAVE_SYS_CDEFS
- # include <sys/cdefs.h>
- # else
- # ifdef __STDC__
- # define __P(p) p
- # define __PMT(p) p
- # else
- # define __P(p) ()
- # define __PMT(p) ()
- # endif
- # endif
- #endif /*!__P*/
- /* For backward compatibility */
- #ifndef _PARAMS
- # define _PARAMS(protos) __P(protos)
- #endif /*!_PARAMS*/
- #ifndef __STDC__
- # ifndef const
- # define const
- # endif
- #endif
- #define _IO_UNIFIED_JUMPTABLES 1
- #ifndef _G_HAVE_PRINTF_FP
- # define _IO_USE_DTOA 1
- #endif
- #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
- /* 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;
- /* Handle lock. */
- #ifdef _IO_MTSAFE_IO
- # if defined __GLIBC__ && __GLIBC__ >= 2
- # include <bits/stdio-lock.h>
- # else
- /*# include <comthread.h>*/
- # endif
- #else
- 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;
- # else
- void *__pad1;
- void *__pad2;
- # endif
- int _mode;
- /* Make sure we don't get into trouble again. */
- char _unused2[15 * sizeof (int) - 2 * sizeof (void *)];
- #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, or -1 if
- there is an error without writing 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 _GNU_SOURCE
- /* 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 *) __THROW;
- extern int __uflow (_IO_FILE *) __THROW;
- extern int __overflow (_IO_FILE *, int) __THROW;
- extern _IO_wint_t __wunderflow (_IO_FILE *) __THROW;
- extern _IO_wint_t __wuflow (_IO_FILE *) __THROW;
- extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t) __THROW;
- #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)))
- #define _IO_getwc_unlocked(_fp)
- (_IO_BE ((_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->_IO_write_ptr
- >= (_fp)->_wide_data->_IO_write_end, 0)
- ? __woverflow (_fp, _wch)
- : (_IO_wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
- #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) __THROW;
- extern int _IO_putc (int __c, _IO_FILE *__fp) __THROW;
- extern int _IO_feof (_IO_FILE *__fp) __THROW;
- extern int _IO_ferror (_IO_FILE *__fp) __THROW;
- extern int _IO_peekc_locked (_IO_FILE *__fp) __THROW;
- /* 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;
- #ifdef _IO_MTSAFE_IO
- # define _IO_peekc(_fp) _IO_peekc_locked (_fp)
- # 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)
- #else
- # define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
- # define _IO_flockfile(_fp) /**/
- # define _IO_funlockfile(_fp) /**/
- # define _IO_ftrylockfile(_fp) /**/
- # define _IO_cleanup_region_start(_fct, _fp) /**/
- # define _IO_cleanup_region_end(_Doit) /**/
- #endif /* !_IO_MTSAFE_IO */
- extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
- _IO_va_list, int *__restrict) __THROW;
- extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
- _IO_va_list) __THROW;
- extern _IO_ssize_t _IO_padn (_IO_FILE *, int, _IO_ssize_t) __THROW;
- extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t) __THROW;
- extern _IO_off64_t _IO_seekoff (_IO_FILE *, _IO_off64_t, int, int) __THROW;
- extern _IO_off64_t _IO_seekpos (_IO_FILE *, _IO_off64_t, int) __THROW;
- 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) __THROW;
- extern _IO_wint_t _IO_putwc (wchar_t __wc, _IO_FILE *__fp) __THROW;
- 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) __THROW;
- extern int _IO_vfwprintf (_IO_FILE *__restrict, const wchar_t *__restrict,
- _IO_va_list) __THROW;
- extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t) __THROW;
- extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
- #endif
- #ifdef __cplusplus
- }
- #endif
- #endif /* _IO_STDIO_H */