1/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
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
28#ifndef _IO_STDIO_H
29#define _IO_STDIO_H
30
31#include <_G_config.h>
32/* ALL of these should be defined in _G_config.h */
33#define _IO_fpos_t _G_fpos_t
34#define _IO_fpos64_t _G_fpos64_t
35#define _IO_size_t size_t
36#define _IO_ssize_t __ssize_t
37#define _IO_off_t __off_t
38#define _IO_off64_t __off64_t
39#define _IO_pid_t __pid_t
40#define _IO_uid_t __uid_t
41#define _IO_iconv_t _G_iconv_t
42#define _IO_HAVE_ST_BLKSIZE _G_HAVE_ST_BLKSIZE
43#define _IO_BUFSIZ _G_BUFSIZ
44#define _IO_va_list _G_va_list
45#define _IO_wint_t wint_t
46
47/* This define avoids name pollution if we're using GNU stdarg.h */
48#define __need___va_list
49#include <stdarg.h>
50#ifdef __GNUC_VA_LIST
51# undef _IO_va_list
52# define _IO_va_list __gnuc_va_list
53#endif /* __GNUC_VA_LIST */
54
55#ifndef __P
56# include <sys/cdefs.h>
57#endif /*!__P*/
58
59#define _IO_UNIFIED_JUMPTABLES 1
60
61#ifndef EOF
62# define EOF (-1)
63#endif
64#ifndef NULL
65# if defined __GNUG__ && \
66 (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
67# define NULL (__null)
68# else
69# if !defined(__cplusplus)
70# define NULL ((void*)0)
71# else
72# define NULL (0)
73# endif
74# endif
75#endif
76
77#define _IOS_INPUT 1
78#define _IOS_OUTPUT 2
79#define _IOS_ATEND 4
80#define _IOS_APPEND 8
81#define _IOS_TRUNC 16
82#define _IOS_NOCREATE 32
83#define _IOS_NOREPLACE 64
84#define _IOS_BIN 128
85
86/* Magic numbers and bits for the _flags field.
87 The magic numbers use the high-order bits of _flags;
88 the remaining bits are available for variable flags.
89 Note: The magic numbers must all be negative if stdio
90 emulation is desired. */
91
92#define _IO_MAGIC 0xFBAD0000 /* Magic number */
93#define _OLD_STDIO_MAGIC 0xFABC0000 /* Emulate old stdio. */
94#define _IO_MAGIC_MASK 0xFFFF0000
95#define _IO_USER_BUF 1 /* User owns buffer; don't delete it on close. */
96#define _IO_UNBUFFERED 2
97#define _IO_NO_READS 4 /* Reading not allowed */
98#define _IO_NO_WRITES 8 /* Writing not allowd */
99#define _IO_EOF_SEEN 0x10
100#define _IO_ERR_SEEN 0x20
101#define _IO_DELETE_DONT_CLOSE 0x40 /* Don't call close(_fileno) on cleanup. */
102#define _IO_LINKED 0x80 /* Set if linked (using _chain) to streambuf::_list_all.*/
103#define _IO_IN_BACKUP 0x100
104#define _IO_LINE_BUF 0x200
105#define _IO_TIED_PUT_GET 0x400 /* Set if put and get pointer logicly tied. */
106#define _IO_CURRENTLY_PUTTING 0x800
107#define _IO_IS_APPENDING 0x1000
108#define _IO_IS_FILEBUF 0x2000
109#define _IO_BAD_SEEN 0x4000
110#define _IO_USER_LOCK 0x8000
111
112#define _IO_FLAGS2_MMAP 1
113#define _IO_FLAGS2_NOTCANCEL 2
114#ifdef _LIBC
115# define _IO_FLAGS2_FORTIFY 4
116#endif
117#define _IO_FLAGS2_USER_WBUF 8
118#ifdef _LIBC
119# define _IO_FLAGS2_SCANF_STD 16
120# define _IO_FLAGS2_NOCLOSE 32
121# define _IO_FLAGS2_CLOEXEC 64
122#endif
123
124/* These are "formatting flags" matching the iostream fmtflags enum values. */
125#define _IO_SKIPWS 01
126#define _IO_LEFT 02
127#define _IO_RIGHT 04
128#define _IO_INTERNAL 010
129#define _IO_DEC 020
130#define _IO_OCT 040
131#define _IO_HEX 0100
132#define _IO_SHOWBASE 0200
133#define _IO_SHOWPOINT 0400
134#define _IO_UPPERCASE 01000
135#define _IO_SHOWPOS 02000
136#define _IO_SCIENTIFIC 04000
137#define _IO_FIXED 010000
138#define _IO_UNITBUF 020000
139#define _IO_STDIO 040000
140#define _IO_DONT_CLOSE 0100000
141#define _IO_BOOLALPHA 0200000
142
143
144struct _IO_jump_t; struct _IO_FILE;
145
146/* Handle lock. */
147#ifdef _IO_MTSAFE_IO
148/* _IO_lock_t defined in internal headers during the glibc build. */
149#else
150typedef void _IO_lock_t;
151#endif
152
153
154/* A streammarker remembers a position in a buffer. */
155
156struct _IO_marker {
157 struct _IO_marker *_next;
158 struct _IO_FILE *_sbuf;
159 /* If _pos >= 0
160 it points to _buf->Gbase()+_pos. FIXME comment */
161 /* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
162 int _pos;
163#if 0
164 void set_streampos(streampos sp) { _spos = sp; }
165 void set_offset(int offset) { _pos = offset; _spos = (streampos)(-2); }
166 public:
167 streammarker(streambuf *sb);
168 ~streammarker();
169 int saving() { return _spos == -2; }
170 int delta(streammarker&);
171 int delta();
172#endif
173};
174
175/* This is the structure from the libstdc++ codecvt class. */
176enum __codecvt_result
177{
178 __codecvt_ok,
179 __codecvt_partial,
180 __codecvt_error,
181 __codecvt_noconv
182};
183
184#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
185/* The order of the elements in the following struct must match the order
186 of the virtual functions in the libstdc++ codecvt class. */
187struct _IO_codecvt
188{
189 void (*__codecvt_destr) (struct _IO_codecvt *);
190 enum __codecvt_result (*__codecvt_do_out) (struct _IO_codecvt *,
191 __mbstate_t *,
192 const wchar_t *,
193 const wchar_t *,
194 const wchar_t **, char *,
195 char *, char **);
196 enum __codecvt_result (*__codecvt_do_unshift) (struct _IO_codecvt *,
197 __mbstate_t *, char *,
198 char *, char **);
199 enum __codecvt_result (*__codecvt_do_in) (struct _IO_codecvt *,
200 __mbstate_t *,
201 const char *, const char *,
202 const char **, wchar_t *,
203 wchar_t *, wchar_t **);
204 int (*__codecvt_do_encoding) (struct _IO_codecvt *);
205 int (*__codecvt_do_always_noconv) (struct _IO_codecvt *);
206 int (*__codecvt_do_length) (struct _IO_codecvt *, __mbstate_t *,
207 const char *, const char *, _IO_size_t);
208 int (*__codecvt_do_max_length) (struct _IO_codecvt *);
209
210 _IO_iconv_t __cd_in;
211 _IO_iconv_t __cd_out;
212};
213
214/* Extra data for wide character streams. */
215struct _IO_wide_data
216{
217 wchar_t *_IO_read_ptr; /* Current read pointer */
218 wchar_t *_IO_read_end; /* End of get area. */
219 wchar_t *_IO_read_base; /* Start of putback+get area. */
220 wchar_t *_IO_write_base; /* Start of put area. */
221 wchar_t *_IO_write_ptr; /* Current put pointer. */
222 wchar_t *_IO_write_end; /* End of put area. */
223 wchar_t *_IO_buf_base; /* Start of reserve area. */
224 wchar_t *_IO_buf_end; /* End of reserve area. */
225 /* The following fields are used to support backing up and undo. */
226 wchar_t *_IO_save_base; /* Pointer to start of non-current get area. */
227 wchar_t *_IO_backup_base; /* Pointer to first valid character of
228 backup area */
229 wchar_t *_IO_save_end; /* Pointer to end of non-current get area. */
230
231 __mbstate_t _IO_state;
232 __mbstate_t _IO_last_state;
233 struct _IO_codecvt _codecvt;
234
235 wchar_t _shortbuf[1];
236
237 const struct _IO_jump_t *_wide_vtable;
238};
239#endif
240
241struct _IO_FILE {
242 int _flags; /* High-order word is _IO_MAGIC; rest is flags. */
243#define _IO_file_flags _flags
244
245 /* The following pointers correspond to the C++ streambuf protocol. */
246 /* Note: Tk uses the _IO_read_ptr and _IO_read_end fields directly. */
247 char* _IO_read_ptr; /* Current read pointer */
248 char* _IO_read_end; /* End of get area. */
249 char* _IO_read_base; /* Start of putback+get area. */
250 char* _IO_write_base; /* Start of put area. */
251 char* _IO_write_ptr; /* Current put pointer. */
252 char* _IO_write_end; /* End of put area. */
253 char* _IO_buf_base; /* Start of reserve area. */
254 char* _IO_buf_end; /* End of reserve area. */
255 /* The following fields are used to support backing up and undo. */
256 char *_IO_save_base; /* Pointer to start of non-current get area. */
257 char *_IO_backup_base; /* Pointer to first valid character of backup area */
258 char *_IO_save_end; /* Pointer to end of non-current get area. */
259
260 struct _IO_marker *_markers;
261
262 struct _IO_FILE *_chain;
263
264 int _fileno;
265#if 0
266 int _blksize;
267#else
268 int _flags2;
269#endif
270 _IO_off_t _old_offset; /* This used to be _offset but it's too small. */
271
272#define __HAVE_COLUMN /* temporary */
273 /* 1+column number of pbase(); 0 is unknown. */
274 unsigned short _cur_column;
275 signed char _vtable_offset;
276 char _shortbuf[1];
277
278 /* char* _save_gptr; char* _save_egptr; */
279
280 _IO_lock_t *_lock;
281#ifdef _IO_USE_OLD_IO_FILE
282};
283
284struct _IO_FILE_complete
285{
286 struct _IO_FILE _file;
287#endif
288#if defined _G_IO_IO_FILE_VERSION && _G_IO_IO_FILE_VERSION == 0x20001
289 _IO_off64_t _offset;
290# if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
291 /* Wide character stream stuff. */
292 struct _IO_codecvt *_codecvt;
293 struct _IO_wide_data *_wide_data;
294 struct _IO_FILE *_freeres_list;
295 void *_freeres_buf;
296# else
297 void *__pad1;
298 void *__pad2;
299 void *__pad3;
300 void *__pad4;
301# endif
302 size_t __pad5;
303 int _mode;
304 /* Make sure we don't get into trouble again. */
305 char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
306#endif
307};
308
309#ifndef __cplusplus
310typedef struct _IO_FILE _IO_FILE;
311#endif
312
313struct _IO_FILE_plus;
314
315extern struct _IO_FILE_plus _IO_2_1_stdin_;
316extern struct _IO_FILE_plus _IO_2_1_stdout_;
317extern struct _IO_FILE_plus _IO_2_1_stderr_;
318#ifndef _LIBC
319#define _IO_stdin ((_IO_FILE*)(&_IO_2_1_stdin_))
320#define _IO_stdout ((_IO_FILE*)(&_IO_2_1_stdout_))
321#define _IO_stderr ((_IO_FILE*)(&_IO_2_1_stderr_))
322#else
323extern _IO_FILE *_IO_stdin attribute_hidden;
324extern _IO_FILE *_IO_stdout attribute_hidden;
325extern _IO_FILE *_IO_stderr attribute_hidden;
326#endif
327
328
329/* Functions to do I/O and file management for a stream. */
330
331/* Read NBYTES bytes from COOKIE into a buffer pointed to by BUF.
332 Return number of bytes read. */
333typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
334
335/* Write N bytes pointed to by BUF to COOKIE. Write all N bytes
336 unless there is an error. Return number of bytes written. If
337 there is an error, return 0 and do not write anything. If the file
338 has been opened for append (__mode.__append set), then set the file
339 pointer to the end of the file and then do the write; if not, just
340 write at the current file pointer. */
341typedef __ssize_t __io_write_fn (void *__cookie, const char *__buf,
342 size_t __n);
343
344/* Move COOKIE's file position to *POS bytes from the
345 beginning of the file (if W is SEEK_SET),
346 the current position (if W is SEEK_CUR),
347 or the end of the file (if W is SEEK_END).
348 Set *POS to the new file position.
349 Returns zero if successful, nonzero if not. */
350typedef int __io_seek_fn (void *__cookie, _IO_off64_t *__pos, int __w);
351
352/* Close COOKIE. */
353typedef int __io_close_fn (void *__cookie);
354
355
356#ifdef _GNU_SOURCE
357/* User-visible names for the above. */
358typedef __io_read_fn cookie_read_function_t;
359typedef __io_write_fn cookie_write_function_t;
360typedef __io_seek_fn cookie_seek_function_t;
361typedef __io_close_fn cookie_close_function_t;
362
363/* The structure with the cookie function pointers. */
364typedef struct
365{
366 __io_read_fn *read; /* Read bytes. */
367 __io_write_fn *write; /* Write bytes. */
368 __io_seek_fn *seek; /* Seek/tell file position. */
369 __io_close_fn *close; /* Close file. */
370} _IO_cookie_io_functions_t;
371typedef _IO_cookie_io_functions_t cookie_io_functions_t;
372
373struct _IO_cookie_file;
374
375/* Initialize one of those. */
376extern void _IO_cookie_init (struct _IO_cookie_file *__cfile, int __read_write,
377 void *__cookie, _IO_cookie_io_functions_t __fns);
378#endif
379
380
381#ifdef __cplusplus
382extern "C" {
383#endif
384
385extern int __underflow (_IO_FILE *);
386extern int __uflow (_IO_FILE *);
387extern int __overflow (_IO_FILE *, int);
388#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
389extern _IO_wint_t __wunderflow (_IO_FILE *);
390extern _IO_wint_t __wuflow (_IO_FILE *);
391extern _IO_wint_t __woverflow (_IO_FILE *, _IO_wint_t);
392#endif
393
394#if __GNUC__ >= 3
395# define _IO_BE(expr, res) __builtin_expect ((expr), res)
396#else
397# define _IO_BE(expr, res) (expr)
398#endif
399
400#define _IO_getc_unlocked(_fp) \
401 (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
402 ? __uflow (_fp) : *(unsigned char *) (_fp)->_IO_read_ptr++)
403#define _IO_peekc_unlocked(_fp) \
404 (_IO_BE ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end, 0) \
405 && __underflow (_fp) == EOF ? EOF \
406 : *(unsigned char *) (_fp)->_IO_read_ptr)
407#define _IO_putc_unlocked(_ch, _fp) \
408 (_IO_BE ((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end, 0) \
409 ? __overflow (_fp, (unsigned char) (_ch)) \
410 : (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch)))
411
412#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
413# define _IO_getwc_unlocked(_fp) \
414 (_IO_BE ((_fp)->_wide_data == NULL \
415 || ((_fp)->_wide_data->_IO_read_ptr \
416 >= (_fp)->_wide_data->_IO_read_end), 0) \
417 ? __wuflow (_fp) : (_IO_wint_t) *(_fp)->_wide_data->_IO_read_ptr++)
418# define _IO_putwc_unlocked(_wch, _fp) \
419 (_IO_BE ((_fp)->_wide_data == NULL \
420 || ((_fp)->_wide_data->_IO_write_ptr \
421 >= (_fp)->_wide_data->_IO_write_end), 0) \
422 ? __woverflow (_fp, _wch) \
423 : (_IO_wint_t) (*(_fp)->_wide_data->_IO_write_ptr++ = (_wch)))
424#endif
425
426#define _IO_feof_unlocked(__fp) (((__fp)->_flags & _IO_EOF_SEEN) != 0)
427#define _IO_ferror_unlocked(__fp) (((__fp)->_flags & _IO_ERR_SEEN) != 0)
428
429extern int _IO_getc (_IO_FILE *__fp);
430extern int _IO_putc (int __c, _IO_FILE *__fp);
431extern int _IO_feof (_IO_FILE *__fp) __THROW;
432extern int _IO_ferror (_IO_FILE *__fp) __THROW;
433
434extern int _IO_peekc_locked (_IO_FILE *__fp);
435
436/* This one is for Emacs. */
437#define _IO_PENDING_OUTPUT_COUNT(_fp) \
438 ((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
439
440extern void _IO_flockfile (_IO_FILE *) __THROW;
441extern void _IO_funlockfile (_IO_FILE *) __THROW;
442extern int _IO_ftrylockfile (_IO_FILE *) __THROW;
443
444#ifdef _IO_MTSAFE_IO
445# define _IO_peekc(_fp) _IO_peekc_locked (_fp)
446# define _IO_flockfile(_fp) \
447 if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_flockfile (_fp)
448# define _IO_funlockfile(_fp) \
449 if (((_fp)->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (_fp)
450#else
451# define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
452# define _IO_flockfile(_fp) /**/
453# define _IO_funlockfile(_fp) /**/
454# define _IO_ftrylockfile(_fp) /**/
455# define _IO_cleanup_region_start(_fct, _fp) /**/
456# define _IO_cleanup_region_end(_Doit) /**/
457#endif /* !_IO_MTSAFE_IO */
458
459extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
460 _IO_va_list, int *__restrict);
461extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
462 _IO_va_list);
463extern _IO_ssize_t _IO_padn (_IO_FILE *, int, _IO_ssize_t);
464extern _IO_size_t _IO_sgetn (_IO_FILE *, void *, _IO_size_t);
465
466extern _IO_off64_t _IO_seekoff (_IO_FILE *, _IO_off64_t, int, int);
467extern _IO_off64_t _IO_seekpos (_IO_FILE *, _IO_off64_t, int);
468
469extern void _IO_free_backup_area (_IO_FILE *) __THROW;
470
471#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
472extern _IO_wint_t _IO_getwc (_IO_FILE *__fp);
473extern _IO_wint_t _IO_putwc (wchar_t __wc, _IO_FILE *__fp);
474extern int _IO_fwide (_IO_FILE *__fp, int __mode) __THROW;
475# if __GNUC__ >= 2
476/* While compiling glibc we have to handle compatibility with very old
477 versions. */
478# if defined _LIBC && defined SHARED
479# include <shlib-compat.h>
480# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
481# define _IO_fwide_maybe_incompatible \
482 (__builtin_expect (&_IO_stdin_used == NULL, 0))
483extern const int _IO_stdin_used;
484weak_extern (_IO_stdin_used);
485# endif
486# endif
487# ifndef _IO_fwide_maybe_incompatible
488# define _IO_fwide_maybe_incompatible (0)
489# endif
490/* A special optimized version of the function above. It optimizes the
491 case of initializing an unoriented byte stream. */
492# define _IO_fwide(__fp, __mode) \
493 ({ int __result = (__mode); \
494 if (__result < 0 && ! _IO_fwide_maybe_incompatible) \
495 { \
496 if ((__fp)->_mode == 0) \
497 /* We know that all we have to do is to set the flag. */ \
498 (__fp)->_mode = -1; \
499 __result = (__fp)->_mode; \
500 } \
501 else if (__builtin_constant_p (__mode) && (__mode) == 0) \
502 __result = _IO_fwide_maybe_incompatible ? -1 : (__fp)->_mode; \
503 else \
504 __result = _IO_fwide (__fp, __result); \
505 __result; })
506# endif
507
508extern int _IO_vfwscanf (_IO_FILE * __restrict, const wchar_t * __restrict,
509 _IO_va_list, int *__restrict);
510extern int _IO_vfwprintf (_IO_FILE *__restrict, const wchar_t *__restrict,
511 _IO_va_list);
512extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t);
513extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
514#endif
515
516#ifdef __LDBL_COMPAT
517# include <bits/libio-ldbl.h>
518#endif
519
520#ifdef __cplusplus
521}
522#endif
523
524#endif /* _IO_STDIO_H */
525