about summary refs log tree commit diff
path: root/libio/stdio.h
blob: 998470943e63c41ebe297e05638a899ffb221b7e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
/* Define ISO C stdio on top of C++ iostreams.
   Copyright (C) 1991-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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/>.  */

/*
 *	ISO C99 Standard: 7.19 Input/output	<stdio.h>
 */

#ifndef _STDIO_H
#define _STDIO_H	1

#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
#include <bits/libc-header-start.h>

__BEGIN_DECLS

#define __need_size_t
#define __need_NULL
#include <stddef.h>

#define __need___va_list
#include <stdarg.h>

#include <bits/types.h>
#include <bits/types/__fpos_t.h>
#include <bits/types/__fpos64_t.h>
#include <bits/types/__FILE.h>
#include <bits/types/FILE.h>
#include <bits/types/struct_FILE.h>

#ifdef __USE_GNU
# include <bits/types/cookie_io_functions_t.h>
#endif

#if defined __USE_XOPEN || defined __USE_XOPEN2K8
# ifdef __GNUC__
#  ifndef _VA_LIST_DEFINED
typedef __gnuc_va_list va_list;
#   define _VA_LIST_DEFINED
#  endif
# else
#  include <stdarg.h>
# endif
#endif

#if defined __USE_UNIX98 || defined __USE_XOPEN2K
# ifndef __off_t_defined
# ifndef __USE_FILE_OFFSET64
typedef __off_t off_t;
# else
typedef __off64_t off_t;
# endif
# define __off_t_defined
# endif
# if defined __USE_LARGEFILE64 && !defined __off64_t_defined
typedef __off64_t off64_t;
# define __off64_t_defined
# endif
#endif

#ifdef __USE_XOPEN2K8
# ifndef __ssize_t_defined
typedef __ssize_t ssize_t;
# define __ssize_t_defined
# endif
#endif

/* The type of the second argument to `fgetpos' and `fsetpos'.  */
#ifndef __USE_FILE_OFFSET64
typedef __fpos_t fpos_t;
#else
typedef __fpos64_t fpos_t;
#endif
#ifdef __USE_LARGEFILE64
typedef __fpos64_t fpos64_t;
#endif

/* The possibilities for the third argument to `setvbuf'.  */
#define _IOFBF 0		/* Fully buffered.  */
#define _IOLBF 1		/* Line buffered.  */
#define _IONBF 2		/* No buffering.  */


/* Default buffer size.  */
#define BUFSIZ 8192


/* The value returned by fgetc and similar functions to indicate the
   end of the file.  */
#define EOF (-1)


/* The possibilities for the third argument to `fseek'.
   These values should not be changed.  */
#define SEEK_SET	0	/* Seek from beginning of file.  */
#define SEEK_CUR	1	/* Seek from current position.  */
#define SEEK_END	2	/* Seek from end of file.  */
#ifdef __USE_GNU
# define SEEK_DATA	3	/* Seek to next data.  */
# define SEEK_HOLE	4	/* Seek to next hole.  */
#endif


#if defined __USE_MISC || defined __USE_XOPEN
/* Default path prefix for `tempnam' and `tmpnam'.  */
# define P_tmpdir	"/tmp"
#endif


/* Get the values:
   L_tmpnam	How long an array of chars must be to be passed to `tmpnam'.
   TMP_MAX	The minimum number of unique filenames generated by tmpnam
		(and tempnam when it uses tmpnam's name space),
		or tempnam (the two are separate).
   L_ctermid	How long an array to pass to `ctermid'.
   L_cuserid	How long an array to pass to `cuserid'.
   FOPEN_MAX	Minimum number of files that can be open at once.
   FILENAME_MAX	Maximum length of a filename.  */
#include <bits/stdio_lim.h>


/* Standard streams.  */
extern FILE *stdin;		/* Standard input stream.  */
extern FILE *stdout;		/* Standard output stream.  */
extern FILE *stderr;		/* Standard error output stream.  */
/* C89/C99 say they're macros.  Make them happy.  */
#define stdin stdin
#define stdout stdout
#define stderr stderr

/* Remove file FILENAME.  */
extern int remove (const char *__filename) __THROW;
/* Rename file OLD to NEW.  */
extern int rename (const char *__old, const char *__new) __THROW;

#ifdef __USE_ATFILE
/* Rename file OLD relative to OLDFD to NEW relative to NEWFD.  */
extern int renameat (int __oldfd, const char *__old, int __newfd,
		     const char *__new) __THROW;
#endif

#ifdef __USE_GNU
/* Flags for renameat2.  */
# define RENAME_NOREPLACE (1 << 0)
# define RENAME_EXCHANGE (1 << 1)
# define RENAME_WHITEOUT (1 << 2)

/* Rename file OLD relative to OLDFD to NEW relative to NEWFD, with
   additional flags.  */
extern int renameat2 (int __oldfd, const char *__old, int __newfd,
		      const char *__new, unsigned int __flags) __THROW;
#endif

/* Create a temporary file and open it read/write.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
#ifndef __USE_FILE_OFFSET64
extern FILE *tmpfile (void) __wur;
#else
# ifdef __REDIRECT
extern FILE *__REDIRECT (tmpfile, (void), tmpfile64) __wur;
# else
#  define tmpfile tmpfile64
# endif
#endif

#ifdef __USE_LARGEFILE64
extern FILE *tmpfile64 (void) __wur;
#endif

/* Generate a temporary filename.  */
extern char *tmpnam (char *__s) __THROW __wur;

#ifdef __USE_MISC
/* This is the reentrant variant of `tmpnam'.  The only difference is
   that it does not allow S to be NULL.  */
extern char *tmpnam_r (char *__s) __THROW __wur;
#endif


#if defined __USE_MISC || defined __USE_XOPEN
/* Generate a unique temporary filename using up to five characters of PFX
   if it is not NULL.  The directory to put this file in is searched for
   as follows: First the environment variable "TMPDIR" is checked.
   If it contains the name of a writable directory, that directory is used.
   If not and if DIR is not NULL, that value is checked.  If that fails,
   P_tmpdir is tried and finally "/tmp".  The storage for the filename
   is allocated by `malloc'.  */
extern char *tempnam (const char *__dir, const char *__pfx)
     __THROW __attribute_malloc__ __wur;
#endif


/* Close STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fclose (FILE *__stream);
/* Flush STREAM, or all streams if STREAM is NULL.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fflush (FILE *__stream);

#ifdef __USE_MISC
/* Faster versions when locking is not required.

   This function is not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation it is a cancellation point and
   therefore not marked with __THROW.  */
extern int fflush_unlocked (FILE *__stream);
#endif

#ifdef __USE_GNU
/* Close all streams.

   This function is not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation it is a cancellation point and
   therefore not marked with __THROW.  */
extern int fcloseall (void);
#endif


#ifndef __USE_FILE_OFFSET64
/* Open a file and create a new stream for it.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern FILE *fopen (const char *__restrict __filename,
		    const char *__restrict __modes) __wur;
/* Open a file, replacing an existing stream with it.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern FILE *freopen (const char *__restrict __filename,
		      const char *__restrict __modes,
		      FILE *__restrict __stream) __wur;
#else
# ifdef __REDIRECT
extern FILE *__REDIRECT (fopen, (const char *__restrict __filename,
				 const char *__restrict __modes), fopen64)
  __wur;
extern FILE *__REDIRECT (freopen, (const char *__restrict __filename,
				   const char *__restrict __modes,
				   FILE *__restrict __stream), freopen64)
  __wur;
# else
#  define fopen fopen64
#  define freopen freopen64
# endif
#endif
#ifdef __USE_LARGEFILE64
extern FILE *fopen64 (const char *__restrict __filename,
		      const char *__restrict __modes) __wur;
extern FILE *freopen64 (const char *__restrict __filename,
			const char *__restrict __modes,
			FILE *__restrict __stream) __wur;
#endif

#ifdef	__USE_POSIX
/* Create a new stream that refers to an existing system file descriptor.  */
extern FILE *fdopen (int __fd, const char *__modes) __THROW __wur;
#endif

#ifdef	__USE_GNU
/* Create a new stream that refers to the given magic cookie,
   and uses the given functions for input and output.  */
extern FILE *fopencookie (void *__restrict __magic_cookie,
			  const char *__restrict __modes,
			  cookie_io_functions_t __io_funcs) __THROW __wur;
#endif

#if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
/* Create a new stream that refers to a memory buffer.  */
extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
  __THROW __wur;

/* Open a stream that writes into a malloc'd buffer that is expanded as
   necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location
   and the number of characters written on fflush or fclose.  */
extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW __wur;
#endif


/* If BUF is NULL, make STREAM unbuffered.
   Else make it use buffer BUF, of size BUFSIZ.  */
extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
/* Make STREAM use buffering mode MODE.
   If BUF is not NULL, use N bytes of it for buffering;
   else allocate an internal buffer N bytes long.  */
extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
		    int __modes, size_t __n) __THROW;

#ifdef	__USE_MISC
/* If BUF is NULL, make STREAM unbuffered.
   Else make it use SIZE bytes of BUF for buffering.  */
extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
		       size_t __size) __THROW;

/* Make STREAM line-buffered.  */
extern void setlinebuf (FILE *__stream) __THROW;
#endif


/* Write formatted output to STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fprintf (FILE *__restrict __stream,
		    const char *__restrict __format, ...);
/* Write formatted output to stdout.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int printf (const char *__restrict __format, ...);
/* Write formatted output to S.  */
extern int sprintf (char *__restrict __s,
		    const char *__restrict __format, ...) __THROWNL;

/* Write formatted output to S from argument list ARG.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int vfprintf (FILE *__restrict __s, const char *__restrict __format,
		     __gnuc_va_list __arg);
/* Write formatted output to stdout from argument list ARG.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int vprintf (const char *__restrict __format, __gnuc_va_list __arg);
/* Write formatted output to S from argument list ARG.  */
extern int vsprintf (char *__restrict __s, const char *__restrict __format,
		     __gnuc_va_list __arg) __THROWNL;

#if defined __USE_ISOC99 || defined __USE_UNIX98
/* Maximum chars of output to write in MAXLEN.  */
extern int snprintf (char *__restrict __s, size_t __maxlen,
		     const char *__restrict __format, ...)
     __THROWNL __attribute__ ((__format__ (__printf__, 3, 4)));

extern int vsnprintf (char *__restrict __s, size_t __maxlen,
		      const char *__restrict __format, __gnuc_va_list __arg)
     __THROWNL __attribute__ ((__format__ (__printf__, 3, 0)));
#endif

#if __GLIBC_USE (LIB_EXT2)
/* Write formatted output to a string dynamically allocated with `malloc'.
   Store the address of the string in *PTR.  */
extern int vasprintf (char **__restrict __ptr, const char *__restrict __f,
		      __gnuc_va_list __arg)
     __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))) __wur;
extern int __asprintf (char **__restrict __ptr,
		       const char *__restrict __fmt, ...)
     __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
extern int asprintf (char **__restrict __ptr,
		     const char *__restrict __fmt, ...)
     __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
#endif

#ifdef __USE_XOPEN2K8
/* Write formatted output to a file descriptor.  */
extern int vdprintf (int __fd, const char *__restrict __fmt,
		     __gnuc_va_list __arg)
     __attribute__ ((__format__ (__printf__, 2, 0)));
extern int dprintf (int __fd, const char *__restrict __fmt, ...)
     __attribute__ ((__format__ (__printf__, 2, 3)));
#endif


/* Read formatted input from STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fscanf (FILE *__restrict __stream,
		   const char *__restrict __format, ...) __wur;
/* Read formatted input from stdin.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int scanf (const char *__restrict __format, ...) __wur;
/* Read formatted input from S.  */
extern int sscanf (const char *__restrict __s,
		   const char *__restrict __format, ...) __THROW;

/* For historical reasons, the C99-compliant versions of the scanf
   functions are at alternative names.  When __LDBL_COMPAT or
   __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI are in effect, this is handled in
   bits/stdio-ldbl.h.  */
#include <bits/floatn.h>
#if !__GLIBC_USE (DEPRECATED_SCANF) && !defined __LDBL_COMPAT \
    && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
# ifdef __REDIRECT
extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
				const char *__restrict __format, ...),
		       __isoc99_fscanf) __wur;
extern int __REDIRECT (scanf, (const char *__restrict __format, ...),
		       __isoc99_scanf) __wur;
extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s,
				    const char *__restrict __format, ...),
			   __isoc99_sscanf);
# else
extern int __isoc99_fscanf (FILE *__restrict __stream,
			    const char *__restrict __format, ...) __wur;
extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
extern int __isoc99_sscanf (const char *__restrict __s,
			    const char *__restrict __format, ...) __THROW;
#  define fscanf __isoc99_fscanf
#  define scanf __isoc99_scanf
#  define sscanf __isoc99_sscanf
# endif
#endif

#ifdef	__USE_ISOC99
/* Read formatted input from S into argument list ARG.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
		    __gnuc_va_list __arg)
     __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;

/* Read formatted input from stdin into argument list ARG.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg)
     __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;

/* Read formatted input from S into argument list ARG.  */
extern int vsscanf (const char *__restrict __s,
		    const char *__restrict __format, __gnuc_va_list __arg)
     __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));

/* Same redirection as above for the v*scanf family.  */
# if !__GLIBC_USE (DEPRECATED_SCANF)
#  if defined __REDIRECT && !defined __LDBL_COMPAT \
      && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
extern int __REDIRECT (vfscanf,
		       (FILE *__restrict __s,
			const char *__restrict __format, __gnuc_va_list __arg),
		       __isoc99_vfscanf)
     __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
extern int __REDIRECT (vscanf, (const char *__restrict __format,
				__gnuc_va_list __arg), __isoc99_vscanf)
     __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
extern int __REDIRECT_NTH (vsscanf,
			   (const char *__restrict __s,
			    const char *__restrict __format,
			    __gnuc_va_list __arg), __isoc99_vsscanf)
     __attribute__ ((__format__ (__scanf__, 2, 0)));
#  elif !defined __REDIRECT
extern int __isoc99_vfscanf (FILE *__restrict __s,
			     const char *__restrict __format,
			     __gnuc_va_list __arg) __wur;
extern int __isoc99_vscanf (const char *__restrict __format,
			    __gnuc_va_list __arg) __wur;
extern int __isoc99_vsscanf (const char *__restrict __s,
			     const char *__restrict __format,
			     __gnuc_va_list __arg) __THROW;
#   define vfscanf __isoc99_vfscanf
#   define vscanf __isoc99_vscanf
#   define vsscanf __isoc99_vsscanf
#  endif
# endif
#endif /* Use ISO C9x.  */


/* Read a character from STREAM.

   These functions are possible cancellation points and therefore not
   marked with __THROW.  */
extern int fgetc (FILE *__stream);
extern int getc (FILE *__stream);

/* Read a character from stdin.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int getchar (void);

#ifdef __USE_POSIX199506
/* These are defined in POSIX.1:1996.

   These functions are possible cancellation points and therefore not
   marked with __THROW.  */
extern int getc_unlocked (FILE *__stream);
extern int getchar_unlocked (void);
#endif /* Use POSIX.  */

#ifdef __USE_MISC
/* Faster version when locking is not necessary.

   This function is not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation it is a cancellation point and
   therefore not marked with __THROW.  */
extern int fgetc_unlocked (FILE *__stream);
#endif /* Use MISC.  */


/* Write a character to STREAM.

   These functions are possible cancellation points and therefore not
   marked with __THROW.

   These functions is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fputc (int __c, FILE *__stream);
extern int putc (int __c, FILE *__stream);

/* Write a character to stdout.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int putchar (int __c);

#ifdef __USE_MISC
/* Faster version when locking is not necessary.

   This function is not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation it is a cancellation point and
   therefore not marked with __THROW.  */
extern int fputc_unlocked (int __c, FILE *__stream);
#endif /* Use MISC.  */

#ifdef __USE_POSIX199506
/* These are defined in POSIX.1:1996.

   These functions are possible cancellation points and therefore not
   marked with __THROW.  */
extern int putc_unlocked (int __c, FILE *__stream);
extern int putchar_unlocked (int __c);
#endif /* Use POSIX.  */


#if defined __USE_MISC \
    || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
/* Get a word (int) from STREAM.  */
extern int getw (FILE *__stream);

/* Write a word (int) to STREAM.  */
extern int putw (int __w, FILE *__stream);
#endif


/* Get a newline-terminated string of finite length from STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
     __wur __attr_access ((__write_only__, 1, 2));

#if __GLIBC_USE (DEPRECATED_GETS)
/* Get a newline-terminated string from stdin, removing the newline.

   This function is impossible to use safely.  It has been officially
   removed from ISO C11 and ISO C++14, and we have also removed it
   from the _GNU_SOURCE feature list.  It remains available when
   explicitly using an old ISO C, Unix, or POSIX standard.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern char *gets (char *__s) __wur __attribute_deprecated__;
#endif

#ifdef __USE_GNU
/* This function does the same as `fgets' but does not lock the stream.

   This function is not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation it is a cancellation point and
   therefore not marked with __THROW.  */
extern char *fgets_unlocked (char *__restrict __s, int __n,
			     FILE *__restrict __stream) __wur
    __attr_access ((__write_only__, 1, 2));
#endif


#if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
/* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
   (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
   NULL), pointing to *N characters of space.  It is realloc'd as
   necessary.  Returns the number of characters read (not including the
   null terminator), or -1 on error or EOF.

   These functions are not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation they are cancellation points and
   therefore not marked with __THROW.  */
extern __ssize_t __getdelim (char **__restrict __lineptr,
                             size_t *__restrict __n, int __delimiter,
                             FILE *__restrict __stream) __wur;
extern __ssize_t getdelim (char **__restrict __lineptr,
                           size_t *__restrict __n, int __delimiter,
                           FILE *__restrict __stream) __wur;

/* Like `getdelim', but reads up to a newline.

   This function is not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation it is a cancellation point and
   therefore not marked with __THROW.  */
extern __ssize_t getline (char **__restrict __lineptr,
                          size_t *__restrict __n,
                          FILE *__restrict __stream) __wur;
#endif


/* Write a string to STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fputs (const char *__restrict __s, FILE *__restrict __stream);

/* Write a string, followed by a newline, to stdout.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int puts (const char *__s);


/* Push a character back onto the input buffer of STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int ungetc (int __c, FILE *__stream);


/* Read chunks of generic data from STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern size_t fread (void *__restrict __ptr, size_t __size,
		     size_t __n, FILE *__restrict __stream) __wur;
/* Write chunks of generic data to STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern size_t fwrite (const void *__restrict __ptr, size_t __size,
		      size_t __n, FILE *__restrict __s);

#ifdef __USE_GNU
/* This function does the same as `fputs' but does not lock the stream.

   This function is not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation it is a cancellation point and
   therefore not marked with __THROW.  */
extern int fputs_unlocked (const char *__restrict __s,
			   FILE *__restrict __stream);
#endif

#ifdef __USE_MISC
/* Faster versions when locking is not necessary.

   These functions are not part of POSIX and therefore no official
   cancellation point.  But due to similarity with an POSIX interface
   or due to the implementation they are cancellation points and
   therefore not marked with __THROW.  */
extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
			      size_t __n, FILE *__restrict __stream) __wur;
extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
			       size_t __n, FILE *__restrict __stream);
#endif


/* Seek to a certain position on STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fseek (FILE *__stream, long int __off, int __whence);
/* Return the current position of STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern long int ftell (FILE *__stream) __wur;
/* Rewind to the beginning of STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern void rewind (FILE *__stream);

/* The Single Unix Specification, Version 2, specifies an alternative,
   more adequate interface for the two functions above which deal with
   file offset.  `long int' is not the right type.  These definitions
   are originally defined in the Large File Support API.  */

#if defined __USE_LARGEFILE || defined __USE_XOPEN2K
# ifndef __USE_FILE_OFFSET64
/* Seek to a certain position on STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fseeko (FILE *__stream, __off_t __off, int __whence);
/* Return the current position of STREAM.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern __off_t ftello (FILE *__stream) __wur;
# else
#  ifdef __REDIRECT
extern int __REDIRECT (fseeko,
		       (FILE *__stream, __off64_t __off, int __whence),
		       fseeko64);
extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
#  else
#   define fseeko fseeko64
#   define ftello ftello64
#  endif
# endif
#endif

#ifndef __USE_FILE_OFFSET64
/* Get STREAM's position.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
/* Set STREAM's position.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int fsetpos (FILE *__stream, const fpos_t *__pos);
#else
# ifdef __REDIRECT
extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
				 fpos_t *__restrict __pos), fgetpos64);
extern int __REDIRECT (fsetpos,
		       (FILE *__stream, const fpos_t *__pos), fsetpos64);
# else
#  define fgetpos fgetpos64
#  define fsetpos fsetpos64
# endif
#endif

#ifdef __USE_LARGEFILE64
extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
extern __off64_t ftello64 (FILE *__stream) __wur;
extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos);
#endif

/* Clear the error and EOF indicators for STREAM.  */
extern void clearerr (FILE *__stream) __THROW;
/* Return the EOF indicator for STREAM.  */
extern int feof (FILE *__stream) __THROW __wur;
/* Return the error indicator for STREAM.  */
extern int ferror (FILE *__stream) __THROW __wur;

#ifdef __USE_MISC
/* Faster versions when locking is not required.  */
extern void clearerr_unlocked (FILE *__stream) __THROW;
extern int feof_unlocked (FILE *__stream) __THROW __wur;
extern int ferror_unlocked (FILE *__stream) __THROW __wur;
#endif


/* Print a message describing the meaning of the value of errno.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern void perror (const char *__s);


#ifdef	__USE_POSIX
/* Return the system file descriptor for STREAM.  */
extern int fileno (FILE *__stream) __THROW __wur;
#endif /* Use POSIX.  */

#ifdef __USE_MISC
/* Faster version when locking is not required.  */
extern int fileno_unlocked (FILE *__stream) __THROW __wur;
#endif


#ifdef __USE_POSIX2
/* Create a new stream connected to a pipe running the given command.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern FILE *popen (const char *__command, const char *__modes) __wur;

/* Close a stream opened by popen and return the status of its child.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
extern int pclose (FILE *__stream);
#endif


#ifdef	__USE_POSIX
/* Return the name of the controlling terminal.  */
extern char *ctermid (char *__s) __THROW;
#endif /* Use POSIX.  */


#if (defined __USE_XOPEN && !defined __USE_XOPEN2K) || defined __USE_GNU
/* Return the name of the current user.  */
extern char *cuserid (char *__s);
#endif /* Use X/Open, but not issue 6.  */


#ifdef	__USE_GNU
struct obstack;			/* See <obstack.h>.  */

/* Write formatted output to an obstack.  */
extern int obstack_printf (struct obstack *__restrict __obstack,
			   const char *__restrict __format, ...)
     __THROWNL __attribute__ ((__format__ (__printf__, 2, 3)));
extern int obstack_vprintf (struct obstack *__restrict __obstack,
			    const char *__restrict __format,
			    __gnuc_va_list __args)
     __THROWNL __attribute__ ((__format__ (__printf__, 2, 0)));
#endif /* Use GNU.  */


#ifdef __USE_POSIX199506
/* These are defined in POSIX.1:1996.  */

/* Acquire ownership of STREAM.  */
extern void flockfile (FILE *__stream) __THROW;

/* Try to acquire ownership of STREAM but do not block if it is not
   possible.  */
extern int ftrylockfile (FILE *__stream) __THROW __wur;

/* Relinquish the ownership granted for STREAM.  */
extern void funlockfile (FILE *__stream) __THROW;
#endif /* POSIX */

#if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
/*  X/Open Issues 1-5 required getopt to be declared in this
   header.  It was removed in Issue 6.  GNU follows Issue 6.  */
# include <bits/getopt_posix.h>
#endif

/* Slow-path routines used by the optimized inline functions in
   bits/stdio.h.  */
extern int __uflow (FILE *);
extern int __overflow (FILE *, int);

/* If we are compiling with optimizing read this file.  It contains
   several optimizing inline functions and macros.  */
#ifdef __USE_EXTERN_INLINES
# include <bits/stdio.h>
#endif
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
# include <bits/stdio2.h>
#endif

#include <bits/floatn.h>
#if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
# include <bits/stdio-ldbl.h>
#endif

__END_DECLS

#endif /* <stdio.h> included.  */