Line data Source code
1 : /* Define ISO C stdio on top of C++ iostreams.
2 : Copyright (C) 1991-2022 Free Software Foundation, Inc.
3 : This file is part of the GNU C Library.
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 : <https://www.gnu.org/licenses/>. */
18 :
19 : /*
20 : * ISO C99 Standard: 7.19 Input/output <stdio.h>
21 : */
22 :
23 : #ifndef _STDIO_H
24 : #define _STDIO_H 1
25 :
26 : #define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
27 : #include <bits/libc-header-start.h>
28 :
29 : __BEGIN_DECLS
30 :
31 : #define __need_size_t
32 : #define __need_NULL
33 : #include <stddef.h>
34 :
35 : #define __need___va_list
36 : #include <stdarg.h>
37 :
38 : #include <bits/types.h>
39 : #include <bits/types/__fpos_t.h>
40 : #include <bits/types/__fpos64_t.h>
41 : #include <bits/types/__FILE.h>
42 : #include <bits/types/FILE.h>
43 : #include <bits/types/struct_FILE.h>
44 :
45 : #ifdef __USE_GNU
46 : # include <bits/types/cookie_io_functions_t.h>
47 : #endif
48 :
49 : #if defined __USE_XOPEN || defined __USE_XOPEN2K8
50 : # ifdef __GNUC__
51 : # ifndef _VA_LIST_DEFINED
52 : typedef __gnuc_va_list va_list;
53 : # define _VA_LIST_DEFINED
54 : # endif
55 : # else
56 : # include <stdarg.h>
57 : # endif
58 : #endif
59 :
60 : #if defined __USE_UNIX98 || defined __USE_XOPEN2K
61 : # ifndef __off_t_defined
62 : # ifndef __USE_FILE_OFFSET64
63 : typedef __off_t off_t;
64 : # else
65 : typedef __off64_t off_t;
66 : # endif
67 : # define __off_t_defined
68 : # endif
69 : # if defined __USE_LARGEFILE64 && !defined __off64_t_defined
70 : typedef __off64_t off64_t;
71 : # define __off64_t_defined
72 : # endif
73 : #endif
74 :
75 : #ifdef __USE_XOPEN2K8
76 : # ifndef __ssize_t_defined
77 : typedef __ssize_t ssize_t;
78 : # define __ssize_t_defined
79 : # endif
80 : #endif
81 :
82 : /* The type of the second argument to `fgetpos' and `fsetpos'. */
83 : #ifndef __USE_FILE_OFFSET64
84 : typedef __fpos_t fpos_t;
85 : #else
86 : typedef __fpos64_t fpos_t;
87 : #endif
88 : #ifdef __USE_LARGEFILE64
89 : typedef __fpos64_t fpos64_t;
90 : #endif
91 :
92 : /* The possibilities for the third argument to `setvbuf'. */
93 : #define _IOFBF 0 /* Fully buffered. */
94 : #define _IOLBF 1 /* Line buffered. */
95 : #define _IONBF 2 /* No buffering. */
96 :
97 :
98 : /* Default buffer size. */
99 : #define BUFSIZ 8192
100 :
101 :
102 : /* The value returned by fgetc and similar functions to indicate the
103 : end of the file. */
104 : #define EOF (-1)
105 :
106 :
107 : /* The possibilities for the third argument to `fseek'.
108 : These values should not be changed. */
109 : #define SEEK_SET 0 /* Seek from beginning of file. */
110 : #define SEEK_CUR 1 /* Seek from current position. */
111 : #define SEEK_END 2 /* Seek from end of file. */
112 : #ifdef __USE_GNU
113 : # define SEEK_DATA 3 /* Seek to next data. */
114 : # define SEEK_HOLE 4 /* Seek to next hole. */
115 : #endif
116 :
117 :
118 : #if defined __USE_MISC || defined __USE_XOPEN
119 : /* Default path prefix for `tempnam' and `tmpnam'. */
120 : # define P_tmpdir "/tmp"
121 : #endif
122 :
123 :
124 : /* Get the values:
125 : L_tmpnam How long an array of chars must be to be passed to `tmpnam'.
126 : TMP_MAX The minimum number of unique filenames generated by tmpnam
127 : (and tempnam when it uses tmpnam's name space),
128 : or tempnam (the two are separate).
129 : L_ctermid How long an array to pass to `ctermid'.
130 : L_cuserid How long an array to pass to `cuserid'.
131 : FOPEN_MAX Minimum number of files that can be open at once.
132 : FILENAME_MAX Maximum length of a filename. */
133 : #include <bits/stdio_lim.h>
134 :
135 :
136 : #if __GLIBC_USE (ISOC2X)
137 : /* Maximum length of printf output for a NaN. */
138 : # define _PRINTF_NAN_LEN_MAX 4
139 : #endif
140 :
141 :
142 : /* Standard streams. */
143 : extern FILE *stdin; /* Standard input stream. */
144 : extern FILE *stdout; /* Standard output stream. */
145 : extern FILE *stderr; /* Standard error output stream. */
146 : /* C89/C99 say they're macros. Make them happy. */
147 : #define stdin stdin
148 : #define stdout stdout
149 : #define stderr stderr
150 :
151 : /* Remove file FILENAME. */
152 : extern int remove (const char *__filename) __THROW;
153 : /* Rename file OLD to NEW. */
154 : extern int rename (const char *__old, const char *__new) __THROW;
155 :
156 : #ifdef __USE_ATFILE
157 : /* Rename file OLD relative to OLDFD to NEW relative to NEWFD. */
158 : extern int renameat (int __oldfd, const char *__old, int __newfd,
159 : const char *__new) __THROW;
160 : #endif
161 :
162 : #ifdef __USE_GNU
163 : /* Flags for renameat2. */
164 : # define RENAME_NOREPLACE (1 << 0)
165 : # define RENAME_EXCHANGE (1 << 1)
166 : # define RENAME_WHITEOUT (1 << 2)
167 :
168 : /* Rename file OLD relative to OLDFD to NEW relative to NEWFD, with
169 : additional flags. */
170 : extern int renameat2 (int __oldfd, const char *__old, int __newfd,
171 : const char *__new, unsigned int __flags) __THROW;
172 : #endif
173 :
174 : /* Close STREAM.
175 :
176 : This function is a possible cancellation point and therefore not
177 : marked with __THROW. */
178 : extern int fclose (FILE *__stream);
179 :
180 : #undef __attr_dealloc_fclose
181 : #define __attr_dealloc_fclose __attr_dealloc (fclose, 1)
182 :
183 : /* Create a temporary file and open it read/write.
184 :
185 : This function is a possible cancellation point and therefore not
186 : marked with __THROW. */
187 : #ifndef __USE_FILE_OFFSET64
188 : extern FILE *tmpfile (void)
189 : __attribute_malloc__ __attr_dealloc_fclose __wur;
190 : #else
191 : # ifdef __REDIRECT
192 : extern FILE *__REDIRECT (tmpfile, (void), tmpfile64)
193 : __attribute_malloc__ __attr_dealloc_fclose __wur;
194 : # else
195 : # define tmpfile tmpfile64
196 : # endif
197 : #endif
198 :
199 : #ifdef __USE_LARGEFILE64
200 : extern FILE *tmpfile64 (void)
201 : __attribute_malloc__ __attr_dealloc_fclose __wur;
202 : #endif
203 :
204 : /* Generate a temporary filename. */
205 : extern char *tmpnam (char[L_tmpnam]) __THROW __wur;
206 :
207 : #ifdef __USE_MISC
208 : /* This is the reentrant variant of `tmpnam'. The only difference is
209 : that it does not allow S to be NULL. */
210 : extern char *tmpnam_r (char __s[L_tmpnam]) __THROW __wur;
211 : #endif
212 :
213 :
214 : #if defined __USE_MISC || defined __USE_XOPEN
215 : /* Generate a unique temporary filename using up to five characters of PFX
216 : if it is not NULL. The directory to put this file in is searched for
217 : as follows: First the environment variable "TMPDIR" is checked.
218 : If it contains the name of a writable directory, that directory is used.
219 : If not and if DIR is not NULL, that value is checked. If that fails,
220 : P_tmpdir is tried and finally "/tmp". The storage for the filename
221 : is allocated by `malloc'. */
222 : extern char *tempnam (const char *__dir, const char *__pfx)
223 : __THROW __attribute_malloc__ __wur __attr_dealloc_free;
224 : #endif
225 :
226 : /* Flush STREAM, or all streams if STREAM is NULL.
227 :
228 : This function is a possible cancellation point and therefore not
229 : marked with __THROW. */
230 : extern int fflush (FILE *__stream);
231 :
232 : #ifdef __USE_MISC
233 : /* Faster versions when locking is not required.
234 :
235 : This function is not part of POSIX and therefore no official
236 : cancellation point. But due to similarity with an POSIX interface
237 : or due to the implementation it is a cancellation point and
238 : therefore not marked with __THROW. */
239 : extern int fflush_unlocked (FILE *__stream);
240 : #endif
241 :
242 : #ifdef __USE_GNU
243 : /* Close all streams.
244 :
245 : This function is not part of POSIX and therefore no official
246 : cancellation point. But due to similarity with an POSIX interface
247 : or due to the implementation it is a cancellation point and
248 : therefore not marked with __THROW. */
249 : extern int fcloseall (void);
250 : #endif
251 :
252 :
253 : #ifndef __USE_FILE_OFFSET64
254 : /* Open a file and create a new stream for it.
255 :
256 : This function is a possible cancellation point and therefore not
257 : marked with __THROW. */
258 2675303 : extern FILE *fopen (const char *__restrict __filename,
259 : const char *__restrict __modes)
260 : __attribute_malloc__ __attr_dealloc_fclose __wur;
261 : /* Open a file, replacing an existing stream with it.
262 :
263 270302 : This function is a possible cancellation point and therefore not
264 : marked with __THROW. */
265 : extern FILE *freopen (const char *__restrict __filename,
266 : const char *__restrict __modes,
267 : FILE *__restrict __stream) __wur;
268 : #else
269 : # ifdef __REDIRECT
270 : extern FILE *__REDIRECT (fopen, (const char *__restrict __filename,
271 : const char *__restrict __modes), fopen64)
272 : __attribute_malloc__ __attr_dealloc_fclose __wur;
273 : extern FILE *__REDIRECT (freopen, (const char *__restrict __filename,
274 : const char *__restrict __modes,
275 : FILE *__restrict __stream), freopen64)
276 : __wur;
277 : # else
278 : # define fopen fopen64
279 : # define freopen freopen64
280 : # endif
281 : #endif
282 : #ifdef __USE_LARGEFILE64
283 48691 : extern FILE *fopen64 (const char *__restrict __filename,
284 : const char *__restrict __modes)
285 : __attribute_malloc__ __attr_dealloc_fclose __wur;
286 : extern FILE *freopen64 (const char *__restrict __filename,
287 : const char *__restrict __modes,
288 30338 : FILE *__restrict __stream) __wur;
289 : #endif
290 :
291 : #ifdef __USE_POSIX
292 : /* Create a new stream that refers to an existing system file descriptor. */
293 : extern FILE *fdopen (int __fd, const char *__modes) __THROW
294 : __attribute_malloc__ __attr_dealloc_fclose __wur;
295 : #endif
296 :
297 : #ifdef __USE_GNU
298 : /* Create a new stream that refers to the given magic cookie,
299 : and uses the given functions for input and output. */
300 : extern FILE *fopencookie (void *__restrict __magic_cookie,
301 : const char *__restrict __modes,
302 : cookie_io_functions_t __io_funcs) __THROW
303 : __attribute_malloc__ __attr_dealloc_fclose __wur;
304 : #endif
305 :
306 : #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
307 : /* Create a new stream that refers to a memory buffer. */
308 : extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
309 : __THROW __attribute_malloc__ __attr_dealloc_fclose __wur;
310 :
311 : /* Open a stream that writes into a malloc'd buffer that is expanded as
312 : necessary. *BUFLOC and *SIZELOC are updated with the buffer's location
313 : and the number of characters written on fflush or fclose. */
314 : extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW
315 : __attribute_malloc__ __attr_dealloc_fclose __wur;
316 :
317 : #ifdef _WCHAR_H
318 : /* Like OPEN_MEMSTREAM, but the stream is wide oriented and produces
319 : a wide character string. Declared here only to add attribute malloc
320 : and only if <wchar.h> has been previously #included. */
321 : extern __FILE *open_wmemstream (wchar_t **__bufloc, size_t *__sizeloc) __THROW
322 : __attribute_malloc__ __attr_dealloc_fclose;
323 : # endif
324 : #endif
325 :
326 : /* If BUF is NULL, make STREAM unbuffered.
327 : Else make it use buffer BUF, of size BUFSIZ. */
328 : extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
329 : /* Make STREAM use buffering mode MODE.
330 : If BUF is not NULL, use N bytes of it for buffering;
331 : else allocate an internal buffer N bytes long. */
332 : extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
333 : int __modes, size_t __n) __THROW;
334 :
335 : #ifdef __USE_MISC
336 : /* If BUF is NULL, make STREAM unbuffered.
337 : Else make it use SIZE bytes of BUF for buffering. */
338 : extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
339 : size_t __size) __THROW;
340 :
341 : /* Make STREAM line-buffered. */
342 : extern void setlinebuf (FILE *__stream) __THROW;
343 : #endif
344 :
345 :
346 : /* Write formatted output to STREAM.
347 :
348 : This function is a possible cancellation point and therefore not
349 : marked with __THROW. */
350 : extern int fprintf (FILE *__restrict __stream,
351 : const char *__restrict __format, ...);
352 : /* Write formatted output to stdout.
353 :
354 : This function is a possible cancellation point and therefore not
355 : marked with __THROW. */
356 : extern int printf (const char *__restrict __format, ...);
357 : /* Write formatted output to S. */
358 : extern int sprintf (char *__restrict __s,
359 : const char *__restrict __format, ...) __THROWNL;
360 :
361 : /* Write formatted output to S from argument list ARG.
362 :
363 : This function is a possible cancellation point and therefore not
364 : marked with __THROW. */
365 : extern int vfprintf (FILE *__restrict __s, const char *__restrict __format,
366 : __gnuc_va_list __arg);
367 : /* Write formatted output to stdout from argument list ARG.
368 :
369 : This function is a possible cancellation point and therefore not
370 : marked with __THROW. */
371 : extern int vprintf (const char *__restrict __format, __gnuc_va_list __arg);
372 : /* Write formatted output to S from argument list ARG. */
373 : extern int vsprintf (char *__restrict __s, const char *__restrict __format,
374 : __gnuc_va_list __arg) __THROWNL;
375 :
376 : #if defined __USE_ISOC99 || defined __USE_UNIX98
377 : /* Maximum chars of output to write in MAXLEN. */
378 : extern int snprintf (char *__restrict __s, size_t __maxlen,
379 : const char *__restrict __format, ...)
380 : __THROWNL __attribute__ ((__format__ (__printf__, 3, 4)));
381 :
382 : extern int vsnprintf (char *__restrict __s, size_t __maxlen,
383 : const char *__restrict __format, __gnuc_va_list __arg)
384 : __THROWNL __attribute__ ((__format__ (__printf__, 3, 0)));
385 : #endif
386 :
387 : #if __GLIBC_USE (LIB_EXT2)
388 : /* Write formatted output to a string dynamically allocated with `malloc'.
389 : Store the address of the string in *PTR. */
390 : extern int vasprintf (char **__restrict __ptr, const char *__restrict __f,
391 : __gnuc_va_list __arg)
392 : __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))) __wur;
393 : extern int __asprintf (char **__restrict __ptr,
394 : const char *__restrict __fmt, ...)
395 : __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
396 : extern int asprintf (char **__restrict __ptr,
397 : const char *__restrict __fmt, ...)
398 : __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
399 : #endif
400 :
401 : #ifdef __USE_XOPEN2K8
402 : /* Write formatted output to a file descriptor. */
403 : extern int vdprintf (int __fd, const char *__restrict __fmt,
404 : __gnuc_va_list __arg)
405 : __attribute__ ((__format__ (__printf__, 2, 0)));
406 : extern int dprintf (int __fd, const char *__restrict __fmt, ...)
407 : __attribute__ ((__format__ (__printf__, 2, 3)));
408 : #endif
409 :
410 :
411 : /* Read formatted input from STREAM.
412 :
413 : This function is a possible cancellation point and therefore not
414 : marked with __THROW. */
415 : extern int fscanf (FILE *__restrict __stream,
416 : const char *__restrict __format, ...) __wur;
417 : /* Read formatted input from stdin.
418 :
419 : This function is a possible cancellation point and therefore not
420 : marked with __THROW. */
421 : extern int scanf (const char *__restrict __format, ...) __wur;
422 : /* Read formatted input from S. */
423 : extern int sscanf (const char *__restrict __s,
424 : const char *__restrict __format, ...) __THROW;
425 :
426 : /* For historical reasons, the C99-compliant versions of the scanf
427 : functions are at alternative names. When __LDBL_COMPAT or
428 : __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI are in effect, this is handled in
429 : bits/stdio-ldbl.h. */
430 : #include <bits/floatn.h>
431 : #if !__GLIBC_USE (DEPRECATED_SCANF) && !defined __LDBL_COMPAT \
432 : && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
433 : # ifdef __REDIRECT
434 : extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
435 : const char *__restrict __format, ...),
436 : __isoc99_fscanf) __wur;
437 : extern int __REDIRECT (scanf, (const char *__restrict __format, ...),
438 : __isoc99_scanf) __wur;
439 : extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s,
440 : const char *__restrict __format, ...),
441 : __isoc99_sscanf);
442 : # else
443 : extern int __isoc99_fscanf (FILE *__restrict __stream,
444 : const char *__restrict __format, ...) __wur;
445 : extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
446 : extern int __isoc99_sscanf (const char *__restrict __s,
447 : const char *__restrict __format, ...) __THROW;
448 : # define fscanf __isoc99_fscanf
449 : # define scanf __isoc99_scanf
450 : # define sscanf __isoc99_sscanf
451 : # endif
452 : #endif
453 :
454 : #ifdef __USE_ISOC99
455 : /* Read formatted input from S into argument list ARG.
456 :
457 : This function is a possible cancellation point and therefore not
458 : marked with __THROW. */
459 : extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
460 : __gnuc_va_list __arg)
461 : __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
462 :
463 : /* Read formatted input from stdin into argument list ARG.
464 :
465 : This function is a possible cancellation point and therefore not
466 : marked with __THROW. */
467 : extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg)
468 : __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
469 :
470 : /* Read formatted input from S into argument list ARG. */
471 : extern int vsscanf (const char *__restrict __s,
472 : const char *__restrict __format, __gnuc_va_list __arg)
473 : __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
474 :
475 : /* Same redirection as above for the v*scanf family. */
476 : # if !__GLIBC_USE (DEPRECATED_SCANF)
477 : # if defined __REDIRECT && !defined __LDBL_COMPAT \
478 : && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
479 : extern int __REDIRECT (vfscanf,
480 : (FILE *__restrict __s,
481 : const char *__restrict __format, __gnuc_va_list __arg),
482 : __isoc99_vfscanf)
483 : __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
484 : extern int __REDIRECT (vscanf, (const char *__restrict __format,
485 : __gnuc_va_list __arg), __isoc99_vscanf)
486 : __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
487 : extern int __REDIRECT_NTH (vsscanf,
488 : (const char *__restrict __s,
489 : const char *__restrict __format,
490 : __gnuc_va_list __arg), __isoc99_vsscanf)
491 : __attribute__ ((__format__ (__scanf__, 2, 0)));
492 : # elif !defined __REDIRECT
493 : extern int __isoc99_vfscanf (FILE *__restrict __s,
494 : const char *__restrict __format,
495 : __gnuc_va_list __arg) __wur;
496 : extern int __isoc99_vscanf (const char *__restrict __format,
497 : __gnuc_va_list __arg) __wur;
498 : extern int __isoc99_vsscanf (const char *__restrict __s,
499 : const char *__restrict __format,
500 : __gnuc_va_list __arg) __THROW;
501 : # define vfscanf __isoc99_vfscanf
502 : # define vscanf __isoc99_vscanf
503 : # define vsscanf __isoc99_vsscanf
504 : # endif
505 : # endif
506 : #endif /* Use ISO C9x. */
507 :
508 :
509 : /* Read a character from STREAM.
510 :
511 : These functions are possible cancellation points and therefore not
512 : marked with __THROW. */
513 : extern int fgetc (FILE *__stream);
514 : extern int getc (FILE *__stream);
515 :
516 : /* Read a character from stdin.
517 :
518 : This function is a possible cancellation point and therefore not
519 : marked with __THROW. */
520 : extern int getchar (void);
521 :
522 : #ifdef __USE_POSIX199506
523 : /* These are defined in POSIX.1:1996.
524 :
525 : These functions are possible cancellation points and therefore not
526 : marked with __THROW. */
527 : extern int getc_unlocked (FILE *__stream);
528 : extern int getchar_unlocked (void);
529 : #endif /* Use POSIX. */
530 :
531 : #ifdef __USE_MISC
532 : /* Faster version when locking is not necessary.
533 :
534 : This function is not part of POSIX and therefore no official
535 : cancellation point. But due to similarity with an POSIX interface
536 : or due to the implementation it is a cancellation point and
537 : therefore not marked with __THROW. */
538 : extern int fgetc_unlocked (FILE *__stream);
539 : #endif /* Use MISC. */
540 :
541 :
542 : /* Write a character to STREAM.
543 :
544 : These functions are possible cancellation points and therefore not
545 : marked with __THROW.
546 :
547 : These functions is a possible cancellation point and therefore not
548 : marked with __THROW. */
549 : extern int fputc (int __c, FILE *__stream);
550 : extern int putc (int __c, FILE *__stream);
551 :
552 : /* Write a character to stdout.
553 :
554 : This function is a possible cancellation point and therefore not
555 : marked with __THROW. */
556 : extern int putchar (int __c);
557 :
558 : #ifdef __USE_MISC
559 : /* Faster version when locking is not necessary.
560 :
561 : This function is not part of POSIX and therefore no official
562 : cancellation point. But due to similarity with an POSIX interface
563 : or due to the implementation it is a cancellation point and
564 : therefore not marked with __THROW. */
565 : extern int fputc_unlocked (int __c, FILE *__stream);
566 : #endif /* Use MISC. */
567 :
568 : #ifdef __USE_POSIX199506
569 : /* These are defined in POSIX.1:1996.
570 :
571 : These functions are possible cancellation points and therefore not
572 : marked with __THROW. */
573 : extern int putc_unlocked (int __c, FILE *__stream);
574 : extern int putchar_unlocked (int __c);
575 : #endif /* Use POSIX. */
576 :
577 :
578 : #if defined __USE_MISC \
579 : || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
580 : /* Get a word (int) from STREAM. */
581 : extern int getw (FILE *__stream);
582 :
583 : /* Write a word (int) to STREAM. */
584 : extern int putw (int __w, FILE *__stream);
585 : #endif
586 :
587 :
588 : /* Get a newline-terminated string of finite length from STREAM.
589 :
590 : This function is a possible cancellation point and therefore not
591 : marked with __THROW. */
592 : extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
593 : __wur __fortified_attr_access (__write_only__, 1, 2);
594 :
595 : #if __GLIBC_USE (DEPRECATED_GETS)
596 : /* Get a newline-terminated string from stdin, removing the newline.
597 :
598 : This function is impossible to use safely. It has been officially
599 : removed from ISO C11 and ISO C++14, and we have also removed it
600 : from the _GNU_SOURCE feature list. It remains available when
601 : explicitly using an old ISO C, Unix, or POSIX standard.
602 :
603 : This function is a possible cancellation point and therefore not
604 : marked with __THROW. */
605 : extern char *gets (char *__s) __wur __attribute_deprecated__;
606 : #endif
607 :
608 : #ifdef __USE_GNU
609 : /* This function does the same as `fgets' but does not lock the stream.
610 :
611 : This function is not part of POSIX and therefore no official
612 : cancellation point. But due to similarity with an POSIX interface
613 : or due to the implementation it is a cancellation point and
614 : therefore not marked with __THROW. */
615 : extern char *fgets_unlocked (char *__restrict __s, int __n,
616 : FILE *__restrict __stream) __wur
617 : __fortified_attr_access (__write_only__, 1, 2);
618 : #endif
619 :
620 :
621 : #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
622 : /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
623 : (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
624 : NULL), pointing to *N characters of space. It is realloc'd as
625 : necessary. Returns the number of characters read (not including the
626 : null terminator), or -1 on error or EOF.
627 :
628 : These functions are not part of POSIX and therefore no official
629 : cancellation point. But due to similarity with an POSIX interface
630 : or due to the implementation they are cancellation points and
631 : therefore not marked with __THROW. */
632 : extern __ssize_t __getdelim (char **__restrict __lineptr,
633 : size_t *__restrict __n, int __delimiter,
634 : FILE *__restrict __stream) __wur;
635 : extern __ssize_t getdelim (char **__restrict __lineptr,
636 : size_t *__restrict __n, int __delimiter,
637 : FILE *__restrict __stream) __wur;
638 :
639 : /* Like `getdelim', but reads up to a newline.
640 :
641 : This function is not part of POSIX and therefore no official
642 : cancellation point. But due to similarity with an POSIX interface
643 : or due to the implementation it is a cancellation point and
644 : therefore not marked with __THROW. */
645 : extern __ssize_t getline (char **__restrict __lineptr,
646 : size_t *__restrict __n,
647 : FILE *__restrict __stream) __wur;
648 : #endif
649 :
650 :
651 : /* Write a string to STREAM.
652 :
653 : This function is a possible cancellation point and therefore not
654 : marked with __THROW. */
655 : extern int fputs (const char *__restrict __s, FILE *__restrict __stream);
656 :
657 : /* Write a string, followed by a newline, to stdout.
658 :
659 : This function is a possible cancellation point and therefore not
660 : marked with __THROW. */
661 : extern int puts (const char *__s);
662 :
663 :
664 : /* Push a character back onto the input buffer of STREAM.
665 :
666 : This function is a possible cancellation point and therefore not
667 : marked with __THROW. */
668 : extern int ungetc (int __c, FILE *__stream);
669 :
670 :
671 : /* Read chunks of generic data from STREAM.
672 :
673 : This function is a possible cancellation point and therefore not
674 : marked with __THROW. */
675 : extern size_t fread (void *__restrict __ptr, size_t __size,
676 : size_t __n, FILE *__restrict __stream) __wur;
677 : /* Write chunks of generic data to STREAM.
678 :
679 : This function is a possible cancellation point and therefore not
680 : marked with __THROW. */
681 : extern size_t fwrite (const void *__restrict __ptr, size_t __size,
682 : size_t __n, FILE *__restrict __s);
683 :
684 : #ifdef __USE_GNU
685 : /* This function does the same as `fputs' but does not lock the stream.
686 :
687 : This function is not part of POSIX and therefore no official
688 : cancellation point. But due to similarity with an POSIX interface
689 : or due to the implementation it is a cancellation point and
690 : therefore not marked with __THROW. */
691 : extern int fputs_unlocked (const char *__restrict __s,
692 : FILE *__restrict __stream);
693 : #endif
694 :
695 : #ifdef __USE_MISC
696 : /* Faster versions when locking is not necessary.
697 :
698 : These functions are not part of POSIX and therefore no official
699 : cancellation point. But due to similarity with an POSIX interface
700 : or due to the implementation they are cancellation points and
701 : therefore not marked with __THROW. */
702 : extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
703 : size_t __n, FILE *__restrict __stream) __wur;
704 : extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
705 : size_t __n, FILE *__restrict __stream);
706 : #endif
707 :
708 :
709 : /* Seek to a certain position on STREAM.
710 :
711 : This function is a possible cancellation point and therefore not
712 : marked with __THROW. */
713 : extern int fseek (FILE *__stream, long int __off, int __whence);
714 : /* Return the current position of STREAM.
715 :
716 : This function is a possible cancellation point and therefore not
717 : marked with __THROW. */
718 : extern long int ftell (FILE *__stream) __wur;
719 : /* Rewind to the beginning of STREAM.
720 :
721 : This function is a possible cancellation point and therefore not
722 : marked with __THROW. */
723 : extern void rewind (FILE *__stream);
724 :
725 : /* The Single Unix Specification, Version 2, specifies an alternative,
726 : more adequate interface for the two functions above which deal with
727 : file offset. `long int' is not the right type. These definitions
728 : are originally defined in the Large File Support API. */
729 :
730 : #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
731 : # ifndef __USE_FILE_OFFSET64
732 : /* Seek to a certain position on STREAM.
733 :
734 : This function is a possible cancellation point and therefore not
735 : marked with __THROW. */
736 : extern int fseeko (FILE *__stream, __off_t __off, int __whence);
737 : /* Return the current position of STREAM.
738 :
739 : This function is a possible cancellation point and therefore not
740 : marked with __THROW. */
741 : extern __off_t ftello (FILE *__stream) __wur;
742 : # else
743 : # ifdef __REDIRECT
744 : extern int __REDIRECT (fseeko,
745 : (FILE *__stream, __off64_t __off, int __whence),
746 : fseeko64);
747 : extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
748 : # else
749 : # define fseeko fseeko64
750 : # define ftello ftello64
751 : # endif
752 : # endif
753 : #endif
754 :
755 : #ifndef __USE_FILE_OFFSET64
756 : /* Get STREAM's position.
757 :
758 : This function is a possible cancellation point and therefore not
759 : marked with __THROW. */
760 : extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
761 : /* Set STREAM's position.
762 :
763 : This function is a possible cancellation point and therefore not
764 : marked with __THROW. */
765 : extern int fsetpos (FILE *__stream, const fpos_t *__pos);
766 : #else
767 : # ifdef __REDIRECT
768 : extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
769 : fpos_t *__restrict __pos), fgetpos64);
770 : extern int __REDIRECT (fsetpos,
771 : (FILE *__stream, const fpos_t *__pos), fsetpos64);
772 : # else
773 : # define fgetpos fgetpos64
774 : # define fsetpos fsetpos64
775 : # endif
776 : #endif
777 :
778 : #ifdef __USE_LARGEFILE64
779 : extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
780 : extern __off64_t ftello64 (FILE *__stream) __wur;
781 : extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
782 : extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos);
783 : #endif
784 :
785 : /* Clear the error and EOF indicators for STREAM. */
786 : extern void clearerr (FILE *__stream) __THROW;
787 : /* Return the EOF indicator for STREAM. */
788 : extern int feof (FILE *__stream) __THROW __wur;
789 : /* Return the error indicator for STREAM. */
790 : extern int ferror (FILE *__stream) __THROW __wur;
791 :
792 : #ifdef __USE_MISC
793 : /* Faster versions when locking is not required. */
794 : extern void clearerr_unlocked (FILE *__stream) __THROW;
795 : extern int feof_unlocked (FILE *__stream) __THROW __wur;
796 : extern int ferror_unlocked (FILE *__stream) __THROW __wur;
797 : #endif
798 :
799 :
800 : /* Print a message describing the meaning of the value of errno.
801 :
802 : This function is a possible cancellation point and therefore not
803 : marked with __THROW. */
804 : extern void perror (const char *__s);
805 :
806 :
807 : #ifdef __USE_POSIX
808 : /* Return the system file descriptor for STREAM. */
809 : extern int fileno (FILE *__stream) __THROW __wur;
810 : #endif /* Use POSIX. */
811 :
812 : #ifdef __USE_MISC
813 : /* Faster version when locking is not required. */
814 : extern int fileno_unlocked (FILE *__stream) __THROW __wur;
815 : #endif
816 :
817 :
818 : #ifdef __USE_POSIX2
819 : /* Close a stream opened by popen and return the status of its child.
820 :
821 : This function is a possible cancellation point and therefore not
822 : marked with __THROW. */
823 : extern int pclose (FILE *__stream);
824 :
825 : /* Create a new stream connected to a pipe running the given command.
826 :
827 : This function is a possible cancellation point and therefore not
828 : marked with __THROW. */
829 : extern FILE *popen (const char *__command, const char *__modes)
830 : __attribute_malloc__ __attr_dealloc (pclose, 1) __wur;
831 :
832 : #endif
833 :
834 :
835 : #ifdef __USE_POSIX
836 : /* Return the name of the controlling terminal. */
837 : extern char *ctermid (char *__s) __THROW
838 : __attr_access ((__write_only__, 1));
839 : #endif /* Use POSIX. */
840 :
841 :
842 : #if (defined __USE_XOPEN && !defined __USE_XOPEN2K) || defined __USE_GNU
843 : /* Return the name of the current user. */
844 : extern char *cuserid (char *__s)
845 : __attr_access ((__write_only__, 1));
846 : #endif /* Use X/Open, but not issue 6. */
847 :
848 :
849 : #ifdef __USE_GNU
850 : struct obstack; /* See <obstack.h>. */
851 :
852 : /* Write formatted output to an obstack. */
853 : extern int obstack_printf (struct obstack *__restrict __obstack,
854 : const char *__restrict __format, ...)
855 : __THROWNL __attribute__ ((__format__ (__printf__, 2, 3)));
856 : extern int obstack_vprintf (struct obstack *__restrict __obstack,
857 : const char *__restrict __format,
858 : __gnuc_va_list __args)
859 : __THROWNL __attribute__ ((__format__ (__printf__, 2, 0)));
860 : #endif /* Use GNU. */
861 :
862 :
863 : #ifdef __USE_POSIX199506
864 : /* These are defined in POSIX.1:1996. */
865 :
866 : /* Acquire ownership of STREAM. */
867 : extern void flockfile (FILE *__stream) __THROW;
868 :
869 : /* Try to acquire ownership of STREAM but do not block if it is not
870 : possible. */
871 : extern int ftrylockfile (FILE *__stream) __THROW __wur;
872 :
873 : /* Relinquish the ownership granted for STREAM. */
874 : extern void funlockfile (FILE *__stream) __THROW;
875 : #endif /* POSIX */
876 :
877 : #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
878 : /* X/Open Issues 1-5 required getopt to be declared in this
879 : header. It was removed in Issue 6. GNU follows Issue 6. */
880 : # include <bits/getopt_posix.h>
881 : #endif
882 :
883 : /* Slow-path routines used by the optimized inline functions in
884 : bits/stdio.h. */
885 : extern int __uflow (FILE *);
886 : extern int __overflow (FILE *, int);
887 :
888 : /* If we are compiling with optimizing read this file. It contains
889 : several optimizing inline functions and macros. */
890 : #ifdef __USE_EXTERN_INLINES
891 : # include <bits/stdio.h>
892 : #endif
893 : #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
894 : # include <bits/stdio2.h>
895 : #endif
896 :
897 : #include <bits/floatn.h>
898 : #if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
899 : # include <bits/stdio-ldbl.h>
900 : #endif
901 :
902 : __END_DECLS
903 :
904 : #endif /* <stdio.h> included. */
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