1/*
2 * Copyright (c) 2000, 2005, 2007, 2009, 2010, 2023 Apple Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23/*-
24 * Copyright (c) 1990, 1993
25 * The Regents of the University of California. All rights reserved.
26 *
27 * This code is derived from software contributed to Berkeley by
28 * Chris Torek.
29 *
30 * Redistribution and use in source and binary forms, with or without
31 * modification, are permitted provided that the following conditions
32 * are met:
33 * 1. Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * 2. Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in the
37 * documentation and/or other materials provided with the distribution.
38 * 3. All advertising materials mentioning features or use of this software
39 * must display the following acknowledgement:
40 * This product includes software developed by the University of
41 * California, Berkeley and its contributors.
42 * 4. Neither the name of the University nor the names of its contributors
43 * may be used to endorse or promote products derived from this software
44 * without specific prior written permission.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 * SUCH DAMAGE.
57 *
58 * @(#)stdio.h 8.5 (Berkeley) 4/29/95
59 */
60
61/*
62 * Common header for stdio.h and xlocale/_stdio.h
63 */
64
65#ifndef _STDIO_H_
66#define _STDIO_H_
67#define __STDIO_H_
68
69#include <_bounds.h>
70#include <sys/cdefs.h>
71#include <Availability.h>
72
73#include <_types.h>
74
75/* DO NOT REMOVE THIS COMMENT: fixincludes needs to see:
76 * __gnuc_va_list and include <stdarg.h> */
77#include <sys/_types/_va_list.h>
78#include <sys/_types/_size_t.h>
79#include <sys/_types/_null.h>
80
81#include <sys/stdio.h>
82#include <_printf.h>
83
84_LIBC_SINGLE_BY_DEFAULT()
85
86typedef __darwin_off_t fpos_t;
87
88#define _FSTDIO /* Define for new stdio with functions. */
89
90/*
91 * NB: to fit things in six character monocase externals, the stdio
92 * code uses the prefix `__s' for stdio objects, typically followed
93 * by a three-character attempt at a mnemonic.
94 */
95
96/* stdio buffers */
97struct __sbuf {
98 unsigned char *_LIBC_COUNT(_size) _base;
99 int _size;
100};
101
102/* hold a buncha junk that would grow the ABI */
103struct __sFILEX;
104
105/*
106 * stdio state variables.
107 *
108 * The following always hold:
109 *
110 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
111 * _lbfsize is -_bf._size, else _lbfsize is 0
112 * if _flags&__SRD, _w is 0
113 * if _flags&__SWR, _r is 0
114 *
115 * This ensures that the getc and putc macros (or inline functions) never
116 * try to write or read from a file that is in `read' or `write' mode.
117 * (Moreover, they can, and do, automatically switch from read mode to
118 * write mode, and back, on "r+" and "w+" files.)
119 *
120 * _lbfsize is used only to make the inline line-buffered output stream
121 * code as compact as possible.
122 *
123 * _ub, _up, and _ur are used when ungetc() pushes back more characters
124 * than fit in the current _bf, or when ungetc() pushes back a character
125 * that does not match the previous one in _bf. When this happens,
126 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
127 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
128 *
129 * NB: see WARNING above before changing the layout of this structure!
130 */
131typedef struct __sFILE {
132 unsigned char *_LIBC_UNSAFE_INDEXABLE _p; /* current position in (some) buffer */
133 int _r; /* read space left for getc() */
134 int _w; /* write space left for putc() */
135 short _flags; /* flags, below; this FILE is free if 0 */
136 short _file; /* fileno, if Unix descriptor, else -1 */
137 struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
138 int _lbfsize; /* 0 or -_bf._size, for inline putc */
139
140 /* operations */
141 void *_cookie; /* cookie passed to io functions */
142 int (* _Nullable _close)(void *);
143 int (* _Nullable _read) (void *, char *_LIBC_COUNT(__n), int __n);
144 fpos_t (* _Nullable _seek) (void *, fpos_t, int);
145 int (* _Nullable _write)(void *, const char *_LIBC_COUNT(__n), int __n);
146
147 /* separate buffer for long sequences of ungetc() */
148 struct __sbuf _ub; /* ungetc buffer */
149 struct __sFILEX *_extra; /* additions to FILE to not break ABI */
150 int _ur; /* saved _r when _r is counting ungetc data */
151
152 /* tricks to meet minimum requirements even when malloc() fails */
153 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
154 unsigned char _nbuf[1]; /* guarantee a getc() buffer */
155
156 /* separate buffer for fgetln() when line crosses buffer boundary */
157 struct __sbuf _lb; /* buffer for fgetln() */
158
159 /* Unix stdio files get aligned to block boundaries on fseek() */
160 int _blksize; /* stat.st_blksize (may be != _bf._size) */
161 fpos_t _offset; /* current lseek offset (see WARNING) */
162} FILE;
163
164#include <sys/_types/_seek_set.h>
165
166__BEGIN_DECLS
167extern FILE *__stdinp __swift_nonisolated_unsafe;
168extern FILE *__stdoutp __swift_nonisolated_unsafe;
169extern FILE *__stderrp __swift_nonisolated_unsafe;
170__END_DECLS
171
172#define __SLBF 0x0001 /* line buffered */
173#define __SNBF 0x0002 /* unbuffered */
174#define __SRD 0x0004 /* OK to read */
175#define __SWR 0x0008 /* OK to write */
176 /* RD and WR are never simultaneously asserted */
177#define __SRW 0x0010 /* open for reading & writing */
178#define __SEOF 0x0020 /* found EOF */
179#define __SERR 0x0040 /* found error */
180#define __SMBF 0x0080 /* _buf is from malloc */
181#define __SAPP 0x0100 /* fdopen()ed in append mode */
182#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
183#define __SOPT 0x0400 /* do fseek() optimisation */
184#define __SNPT 0x0800 /* do not do fseek() optimisation */
185#define __SOFF 0x1000 /* set iff _offset is in fact correct */
186#define __SMOD 0x2000 /* true => fgetln modified _p text */
187#define __SALC 0x4000 /* allocate string space dynamically */
188#define __SIGN 0x8000 /* ignore this file in _fwalk */
189
190/*
191 * The following three definitions are for ANSI C, which took them
192 * from System V, which brilliantly took internal interface macros and
193 * made them official arguments to setvbuf(), without renaming them.
194 * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
195 *
196 * Although numbered as their counterparts above, the implementation
197 * does not rely on this.
198 */
199#define _IOFBF 0 /* setvbuf should set fully buffered */
200#define _IOLBF 1 /* setvbuf should set line buffered */
201#define _IONBF 2 /* setvbuf should set unbuffered */
202
203#define BUFSIZ 1024 /* size of buffer used by setbuf */
204#define EOF (-1)
205
206 /* must be == _POSIX_STREAM_MAX <limits.h> */
207#define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */
208#define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */
209
210/* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
211#ifndef _ANSI_SOURCE
212#define P_tmpdir "/var/tmp/"
213#endif
214#define L_tmpnam 1024 /* XXX must be == PATH_MAX */
215#define TMP_MAX 308915776
216
217#define stdin __stdinp
218#define stdout __stdoutp
219#define stderr __stderrp
220
221#ifdef _DARWIN_UNLIMITED_STREAMS
222#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_3_2
223#error "_DARWIN_UNLIMITED_STREAMS specified, but -miphoneos-version-min version does not support it."
224#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_6
225#error "_DARWIN_UNLIMITED_STREAMS specified, but -mmacosx-version-min version does not support it."
226#endif
227#endif
228
229/* ANSI-C */
230
231__BEGIN_DECLS
232void clearerr(FILE *);
233int fclose(FILE *);
234int feof(FILE *);
235int ferror(FILE *);
236int fflush(FILE *);
237int fgetc(FILE *);
238int fgetpos(FILE * __restrict, fpos_t *);
239char *_LIBC_CSTR fgets(char * __restrict _LIBC_COUNT(__size), int __size, FILE *);
240#if defined(_DARWIN_UNLIMITED_STREAMS) || defined(_DARWIN_C_SOURCE)
241FILE *fopen(const char * __restrict __filename, const char * __restrict __mode) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_3_2, __DARWIN_EXTSN(fopen));
242#else /* !_DARWIN_UNLIMITED_STREAMS && !_DARWIN_C_SOURCE */
243FILE *fopen(const char * __restrict __filename, const char * __restrict __mode) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(fopen));
244#endif /* (DARWIN_UNLIMITED_STREAMS || _DARWIN_C_SOURCE) */
245int fprintf(FILE * __restrict, const char * __restrict, ...) __printflike(2, 3);
246int fputc(int, FILE *);
247int fputs(const char * __restrict, FILE * __restrict) __DARWIN_ALIAS(fputs);
248size_t fread(void * __restrict _LIBC_SIZE(__size * __nitems) __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream);
249FILE *freopen(const char * __restrict, const char * __restrict,
250 FILE * __restrict) __DARWIN_ALIAS(freopen);
251int fscanf(FILE * __restrict, const char * __restrict, ...) __scanflike(2, 3);
252int fseek(FILE *, long, int);
253int fsetpos(FILE *, const fpos_t *);
254long ftell(FILE *);
255size_t fwrite(const void * __restrict _LIBC_SIZE(__size * __nitems) __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream) __DARWIN_ALIAS(fwrite);
256int getc(FILE *);
257int getchar(void);
258
259#if !defined(_POSIX_C_SOURCE)
260__deprecated_msg("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of gets(3), it is highly recommended that you use fgets(3) instead.")
261#endif
262char *_LIBC_CSTR gets(char *_LIBC_UNSAFE_INDEXABLE) _LIBC_PTRCHECK_REPLACED(fgets);
263
264void perror(const char *) __cold;
265int putc(int, FILE *);
266int putchar(int);
267int puts(const char *);
268int remove(const char *);
269int rename (const char *__old, const char *__new);
270void rewind(FILE *);
271int scanf(const char * __restrict, ...) __scanflike(1, 2);
272void setbuf(FILE * __restrict, char * __restrict _LIBC_COUNT_OR_NULL(BUFSIZ));
273int setvbuf(FILE * __restrict, char * __restrict _LIBC_COUNT_OR_NULL(__size), int, size_t __size);
274
275__swift_unavailable("Use snprintf instead.")
276_LIBC_PTRCHECK_REPLACED("snprintf")
277#if !defined(_POSIX_C_SOURCE)
278__deprecated_msg("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of sprintf(3), it is highly recommended that you use snprintf(3) instead.")
279#endif
280int sprintf(char * __restrict _LIBC_UNSAFE_INDEXABLE, const char * __restrict, ...) __printflike(2, 3) _LIBC_PTRCHECK_REPLACED(snprintf);
281
282int sscanf(const char * __restrict, const char * __restrict, ...) __scanflike(2, 3);
283FILE *tmpfile(void);
284
285__swift_unavailable("Use mkstemp(3) instead.")
286#if !defined(_POSIX_C_SOURCE)
287__deprecated_msg("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of tmpnam(3), it is highly recommended that you use mkstemp(3) instead.")
288#endif
289char *_LIBC_CSTR tmpnam(char *_LIBC_COUNT(L_tmpnam));
290
291int ungetc(int, FILE *);
292int vfprintf(FILE * __restrict, const char * __restrict, va_list) __printflike(2, 0);
293int vprintf(const char * __restrict, va_list) __printflike(1, 0);
294
295__swift_unavailable("Use vsnprintf instead.")
296_LIBC_PTRCHECK_REPLACED("vsnprintf")
297#if !defined(_POSIX_C_SOURCE)
298__deprecated_msg("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of sprintf(3), it is highly recommended that you use vsnprintf(3) instead.")
299#endif
300int vsprintf(char * __restrict _LIBC_UNSAFE_INDEXABLE, const char * __restrict, va_list) __printflike(2, 0) _LIBC_PTRCHECK_REPLACED(vsnprintf);
301__END_DECLS
302
303
304
305/* Additional functionality provided by:
306 * POSIX.1-1988
307 */
308
309#if __DARWIN_C_LEVEL >= 198808L
310
311#define L_ctermid 1024 /* size for ctermid(); PATH_MAX */
312#undef _LIBC_COUNT__L_CTERMID
313#define _LIBC_COUNT__L_CTERMID _LIBC_COUNT_OR_NULL(L_ctermid)
314
315#include <_ctermid.h>
316
317__BEGIN_DECLS
318
319#if defined(_DARWIN_UNLIMITED_STREAMS) || defined(_DARWIN_C_SOURCE)
320FILE *fdopen(int, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_3_2, __DARWIN_EXTSN(fdopen));
321#else /* !_DARWIN_UNLIMITED_STREAMS && !_DARWIN_C_SOURCE */
322FILE *fdopen(int, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(fdopen));
323#endif /* (DARWIN_UNLIMITED_STREAMS || _DARWIN_C_SOURCE) */
324int fileno(FILE *);
325__END_DECLS
326#endif /* __DARWIN_C_LEVEL >= 198808L */
327
328
329/* Additional functionality provided by:
330 * POSIX.2-1992 C Language Binding Option
331 */
332
333#if __DARWIN_C_LEVEL >= 199209L
334__BEGIN_DECLS
335int pclose(FILE *) __swift_unavailable("Use posix_spawn APIs or NSTask instead. (On iOS, process spawning is unavailable.)");
336#if defined(_DARWIN_UNLIMITED_STREAMS) || defined(_DARWIN_C_SOURCE)
337FILE *popen(const char *, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_3_2, __DARWIN_EXTSN(popen)) __swift_unavailable("Use posix_spawn APIs or NSTask instead. (On iOS, process spawning is unavailable.)");
338#else /* !_DARWIN_UNLIMITED_STREAMS && !_DARWIN_C_SOURCE */
339FILE *popen(const char *, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(popen)) __swift_unavailable("Use posix_spawn APIs or NSTask instead. (On iOS, process spawning is unavailable.)");
340#endif /* (DARWIN_UNLIMITED_STREAMS || _DARWIN_C_SOURCE) */
341__END_DECLS
342#endif /* __DARWIN_C_LEVEL >= 199209L */
343
344/* Additional functionality provided by:
345 * POSIX.1c-1995,
346 * POSIX.1i-1995,
347 * and the omnibus ISO/IEC 9945-1: 1996
348 */
349
350#if __DARWIN_C_LEVEL >= 199506L
351
352/* Functions internal to the implementation. */
353__BEGIN_DECLS
354int __srget(FILE *);
355int __svfscanf(FILE *, const char *, va_list) __scanflike(2, 0);
356int __swbuf(int, FILE *);
357__END_DECLS
358
359/*
360 * The __sfoo macros are here so that we can
361 * define function versions in the C library.
362 */
363#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
364#if defined(__GNUC__) && defined(__STDC__)
365__header_always_inline int __sputc(int _c, FILE *_p) {
366 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
367 return (*_p->_p++ = _c);
368 else
369 return (__swbuf(_c, _p));
370}
371#else
372/*
373 * This has been tuned to generate reasonable code on the vax using pcc.
374 */
375#define __sputc(c, p) \
376 (--(p)->_w < 0 ? \
377 (p)->_w >= (p)->_lbfsize ? \
378 (*(p)->_p = (c)), *(p)->_p != '\n' ? \
379 (int)*(p)->_p++ : \
380 __swbuf('\n', p) : \
381 __swbuf((int)(c), p) : \
382 (*(p)->_p = (c), (int)*(p)->_p++))
383#endif
384
385#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
386#define __sferror(p) (((p)->_flags & __SERR) != 0)
387#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
388#define __sfileno(p) ((p)->_file)
389
390__BEGIN_DECLS
391void flockfile(FILE *);
392int ftrylockfile(FILE *);
393void funlockfile(FILE *);
394int getc_unlocked(FILE *);
395int getchar_unlocked(void);
396int putc_unlocked(int, FILE *);
397int putchar_unlocked(int);
398
399/* Removed in Issue 6 */
400#if !defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE < 200112L
401int getw(FILE *);
402int putw(int, FILE *);
403#endif
404
405__swift_unavailable("Use mkstemp(3) instead.")
406#if !defined(_POSIX_C_SOURCE)
407__deprecated_msg("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of tempnam(3), it is highly recommended that you use mkstemp(3) instead.")
408#endif
409char *_LIBC_CSTR tempnam(const char *__dir, const char *__prefix) __DARWIN_ALIAS(tempnam);
410__END_DECLS
411
412#ifndef lint
413#define getc_unlocked(fp) __sgetc(fp)
414#define putc_unlocked(x, fp) __sputc(x, fp)
415#endif /* lint */
416
417#define getchar_unlocked() getc_unlocked(stdin)
418#define putchar_unlocked(x) putc_unlocked(x, stdout)
419#endif /* __DARWIN_C_LEVEL >= 199506L */
420
421
422
423/* Additional functionality provided by:
424 * POSIX.1-2001
425 * ISO C99
426 */
427
428#if __DARWIN_C_LEVEL >= 200112L
429#include <sys/_types/_off_t.h>
430
431__BEGIN_DECLS
432int fseeko(FILE * __stream, off_t __offset, int __whence);
433off_t ftello(FILE * __stream);
434__END_DECLS
435#endif /* __DARWIN_C_LEVEL >= 200112L */
436
437#if __DARWIN_C_LEVEL >= 200112L || defined(_C99_SOURCE) || defined(__cplusplus)
438__BEGIN_DECLS
439int snprintf(char * __restrict _LIBC_COUNT(__size) __str, size_t __size, const char * __restrict __format, ...) __printflike(3, 4);
440int vfscanf(FILE * __restrict __stream, const char * __restrict __format, va_list) __scanflike(2, 0);
441int vscanf(const char * __restrict __format, va_list) __scanflike(1, 0);
442int vsnprintf(char * __restrict _LIBC_COUNT(__size) __str, size_t __size, const char * __restrict __format, va_list) __printflike(3, 0);
443int vsscanf(const char * __restrict __str, const char * __restrict __format, va_list) __scanflike(2, 0);
444__END_DECLS
445#endif /* __DARWIN_C_LEVEL >= 200112L || defined(_C99_SOURCE) || defined(__cplusplus) */
446
447
448
449/* Additional functionality provided by:
450 * POSIX.1-2008
451 */
452
453#if __DARWIN_C_LEVEL >= 200809L
454#include <sys/_types/_ssize_t.h>
455
456__BEGIN_DECLS
457int dprintf(int, const char * __restrict, ...) __printflike(2, 3) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
458int vdprintf(int, const char * __restrict, va_list) __printflike(2, 0) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
459ssize_t getdelim(char *_LIBC_COUNT(*__linecapp) *__restrict __linep, size_t * __restrict __linecapp, int __delimiter, FILE * __restrict __stream) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
460ssize_t getline(char *_LIBC_COUNT(*__linecapp) *__restrict __linep, size_t * __restrict __linecapp, FILE * __restrict __stream) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
461FILE *fmemopen(void * __restrict __buf _LIBC_SIZE(__size), size_t __size, const char * __restrict __mode) __API_AVAILABLE(macos(10.13), ios(11.0), tvos(11.0), watchos(4.0));
462FILE *open_memstream(char *_LIBC_COUNT(*__sizep) *__bufp, size_t *__sizep) __API_AVAILABLE(macos(10.13), ios(11.0), tvos(11.0), watchos(4.0));
463__END_DECLS
464#endif /* __DARWIN_C_LEVEL >= 200809L */
465
466
467
468/* Darwin extensions */
469
470#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
471__BEGIN_DECLS
472extern __const int sys_nerr; /* perror(3) external variables */
473extern __const char *__const sys_errlist[];
474
475int asprintf(char *_LIBC_CSTR *__restrict, const char * __restrict, ...) __printflike(2, 3);
476char *_LIBC_CSTR ctermid_r(char *_LIBC_COUNT(L_ctermid));
477char *_LIBC_COUNT(*__len) fgetln(FILE *, size_t *__len);
478__const char *fmtcheck(const char *, const char *) __attribute__((format_arg(2)));
479int fpurge(FILE *);
480void setbuffer(FILE *, char *_LIBC_COUNT_OR_NULL(__size), int __size);
481int setlinebuf(FILE *);
482int vasprintf(char *_LIBC_CSTR *__restrict, const char * __restrict, va_list) __printflike(2, 0);
483
484
485/*
486 * Stdio function-access interface.
487 */
488FILE *funopen(const void *,
489 int (* _Nullable)(void *, char *_LIBC_COUNT(__n), int __n),
490 int (* _Nullable)(void *, const char *_LIBC_COUNT(__n), int __n),
491 fpos_t (* _Nullable)(void *, fpos_t, int),
492 int (* _Nullable)(void *));
493__END_DECLS
494#define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
495#define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
496
497#define feof_unlocked(p) __sfeof(p)
498#define ferror_unlocked(p) __sferror(p)
499#define clearerr_unlocked(p) __sclearerr(p)
500#define fileno_unlocked(p) __sfileno(p)
501
502#endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
503
504
505#if defined (__GNUC__) && _FORTIFY_SOURCE > 0 && !defined (__cplusplus)
506/* Security checking functions. */
507#include <secure/_stdio.h>
508#endif
509
510#endif /* _STDIO_H_ */