2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#)stdio.h 8.5 (Berkeley) 4/29/95
39 #include <sys/cdefs.h>
40 #include <sys/_null.h>
41 #include <sys/_types.h>
43 __NULLABILITY_PRAGMA_PUSH
45 typedef __off_t fpos_t;
47 #ifndef _SIZE_T_DECLARED
48 typedef __size_t size_t;
49 #define _SIZE_T_DECLARED
52 #if __POSIX_VISIBLE >= 200809
53 #ifndef _OFF_T_DECLARED
54 #define _OFF_T_DECLARED
55 typedef __off_t off_t;
57 #ifndef _SSIZE_T_DECLARED
58 #define _SSIZE_T_DECLARED
59 typedef __ssize_t ssize_t;
63 #ifndef _OFF64_T_DECLARED
64 #define _OFF64_T_DECLARED
65 typedef __off64_t off64_t;
68 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
69 #ifndef _VA_LIST_DECLARED
70 typedef __va_list va_list;
71 #define _VA_LIST_DECLARED
75 #define _FSTDIO /* Define for new stdio with functions. */
78 * NB: to fit things in six character monocase externals, the stdio
79 * code uses the prefix `__s' for stdio objects, typically followed
80 * by a three-character attempt at a mnemonic.
90 * stdio state variables.
92 * The following always hold:
94 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
95 * _lbfsize is -_bf._size, else _lbfsize is 0
96 * if _flags&__SRD, _w is 0
97 * if _flags&__SWR, _r is 0
99 * This ensures that the getc and putc macros (or inline functions) never
100 * try to write or read from a file that is in `read' or `write' mode.
101 * (Moreover, they can, and do, automatically switch from read mode to
102 * write mode, and back, on "r+" and "w+" files.)
104 * _lbfsize is used only to make the inline line-buffered output stream
105 * code as compact as possible.
107 * _ub, _up, and _ur are used when ungetc() pushes back more characters
108 * than fit in the current _bf, or when ungetc() pushes back a character
109 * that does not match the previous one in _bf. When this happens,
110 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
111 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
113 * Certain members of __sFILE are accessed directly via macros or
114 * inline functions. To preserve ABI compat, these members must not
115 * be disturbed. These members are marked below with (*).
118 unsigned char *_p; /* (*) current position in (some) buffer */
119 int _r; /* (*) read space left for getc() */
120 int _w; /* (*) write space left for putc() */
121 short _flags; /* (*) flags, below; this FILE is free if 0 */
122 short _file; /* (*) fileno, if Unix descriptor, else -1 */
123 struct __sbuf _bf; /* (*) the buffer (at least 1 byte, if !NULL) */
124 int _lbfsize; /* (*) 0 or -_bf._size, for inline putc */
127 void *_cookie; /* (*) cookie passed to io functions */
128 int (* _Nullable _close)(void *);
129 int (* _Nullable _read)(void *, char *, int);
130 fpos_t (* _Nullable _seek)(void *, fpos_t, int);
131 int (* _Nullable _write)(void *, const char *, int);
133 /* separate buffer for long sequences of ungetc() */
134 struct __sbuf _ub; /* ungetc buffer */
135 unsigned char *_up; /* saved _p when _p is doing ungetc data */
136 int _ur; /* saved _r when _r is counting ungetc data */
138 /* tricks to meet minimum requirements even when malloc() fails */
139 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
140 unsigned char _nbuf[1]; /* guarantee a getc() buffer */
142 /* separate buffer for fgetln() when line crosses buffer boundary */
143 struct __sbuf _lb; /* buffer for fgetln() */
145 /* Unix stdio files get aligned to block boundaries on fseek() */
146 int _blksize; /* stat.st_blksize (may be != _bf._size) */
147 fpos_t _offset; /* current lseek offset */
149 struct pthread_mutex *_fl_mutex; /* used for MT-safety */
150 struct pthread *_fl_owner; /* current owner */
151 int _fl_count; /* recursive lock count */
152 int _orientation; /* orientation for fwide() */
153 __mbstate_t _mbstate; /* multibyte conversion state */
154 int _flags2; /* additional flags */
156 #ifndef _STDFILE_DECLARED
157 #define _STDFILE_DECLARED
158 typedef struct __sFILE FILE;
160 #ifndef _STDSTREAM_DECLARED
162 extern FILE *__stdinp;
163 extern FILE *__stdoutp;
164 extern FILE *__stderrp;
166 #define _STDSTREAM_DECLARED
169 #define __SLBF 0x0001 /* line buffered */
170 #define __SNBF 0x0002 /* unbuffered */
171 #define __SRD 0x0004 /* OK to read */
172 #define __SWR 0x0008 /* OK to write */
173 /* RD and WR are never simultaneously asserted */
174 #define __SRW 0x0010 /* open for reading & writing */
175 #define __SEOF 0x0020 /* found EOF */
176 #define __SERR 0x0040 /* found error */
177 #define __SMBF 0x0080 /* _bf._base is from malloc */
178 #define __SAPP 0x0100 /* fdopen()ed in append mode */
179 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */
180 #define __SOPT 0x0400 /* do fseek() optimization */
181 #define __SNPT 0x0800 /* do not do fseek() optimization */
182 #define __SOFF 0x1000 /* set iff _offset is in fact correct */
183 #define __SMOD 0x2000 /* true => fgetln modified _p text */
184 #define __SALC 0x4000 /* allocate string space dynamically */
185 #define __SIGN 0x8000 /* ignore this file in _fwalk */
187 #define __S2OAP 0x0001 /* O_APPEND mode is set */
190 * The following three definitions are for ANSI C, which took them
191 * from System V, which brilliantly took internal interface macros and
192 * made them official arguments to setvbuf(), without renaming them.
193 * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
195 * Although numbered as their counterparts above, the implementation
196 * does not rely on this.
198 #define _IOFBF 0 /* setvbuf should set fully buffered */
199 #define _IOLBF 1 /* setvbuf should set line buffered */
200 #define _IONBF 2 /* setvbuf should set unbuffered */
202 #define BUFSIZ 1024 /* size of buffer used by setbuf */
206 * FOPEN_MAX is a minimum maximum, and is the number of streams that
207 * stdio can provide without attempting to allocate further resources
208 * (which could fail). Do not use this for anything.
210 /* must be == _POSIX_STREAM_MAX <limits.h> */
212 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */
214 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */
216 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
218 #define P_tmpdir "/tmp/"
220 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */
221 #define TMP_MAX 308915776
224 #define SEEK_SET 0 /* set file offset to offset */
227 #define SEEK_CUR 1 /* set file offset to current plus offset */
230 #define SEEK_END 2 /* set file offset to EOF plus offset */
233 #define stdin __stdinp
234 #define stdout __stdoutp
235 #define stderr __stderrp
239 #include <xlocale/_stdio.h>
242 * Functions defined in ANSI C standard.
244 void clearerr(FILE *);
250 int fgetpos(FILE * __restrict, fpos_t * __restrict);
251 char *fgets(char * __restrict, int, FILE * __restrict);
252 FILE *fopen(const char * __restrict, const char * __restrict);
253 int fprintf(FILE * __restrict, const char * __restrict, ...);
254 int fputc(int, FILE *);
255 int fputs(const char * __restrict, FILE * __restrict);
256 size_t fread(void * __restrict, size_t, size_t, FILE * __restrict);
257 FILE *freopen(const char * __restrict, const char * __restrict, FILE * __restrict);
258 int fscanf(FILE * __restrict, const char * __restrict, ...);
259 int fseek(FILE *, long, int);
260 int fsetpos(FILE *, const fpos_t *);
262 size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict);
266 void perror(const char *);
267 int printf(const char * __restrict, ...);
268 int putc(int, FILE *);
270 int puts(const char *);
271 int remove(const char *);
272 int rename(const char *, const char *);
274 int scanf(const char * __restrict, ...);
275 void setbuf(FILE * __restrict, char * __restrict);
276 int setvbuf(FILE * __restrict, char * __restrict, int, size_t);
277 int sprintf(char * __restrict, const char * __restrict, ...);
278 int sscanf(const char * __restrict, const char * __restrict, ...);
280 char *tmpnam(char *);
281 int ungetc(int, FILE *);
282 int vfprintf(FILE * __restrict, const char * __restrict,
284 int vprintf(const char * __restrict, __va_list);
285 int vsprintf(char * __restrict, const char * __restrict,
288 #if __ISO_C_VISIBLE >= 1999
289 int snprintf(char * __restrict, size_t, const char * __restrict,
290 ...) __printflike(3, 4);
291 int vfscanf(FILE * __restrict, const char * __restrict, __va_list)
293 int vscanf(const char * __restrict, __va_list) __scanflike(1, 0);
294 int vsnprintf(char * __restrict, size_t, const char * __restrict,
295 __va_list) __printflike(3, 0);
296 int vsscanf(const char * __restrict, const char * __restrict, __va_list)
301 * Functions defined in all versions of POSIX 1003.1.
303 #if __BSD_VISIBLE || (__POSIX_VISIBLE && __POSIX_VISIBLE <= 199506)
304 #define L_cuserid 17 /* size for cuserid(3); MAXLOGNAME, legacy */
308 #define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */
310 char *ctermid(char *);
311 FILE *fdopen(int, const char *);
313 #endif /* __POSIX_VISIBLE */
315 #if __POSIX_VISIBLE >= 199209
317 FILE *popen(const char *, const char *);
320 #if __POSIX_VISIBLE >= 199506
321 int ftrylockfile(FILE *);
322 void flockfile(FILE *);
323 void funlockfile(FILE *);
326 * These are normally used through macros as defined below, but POSIX
327 * requires functions as well.
329 int getc_unlocked(FILE *);
330 int getchar_unlocked(void);
331 int putc_unlocked(int, FILE *);
332 int putchar_unlocked(int);
335 void clearerr_unlocked(FILE *);
336 int feof_unlocked(FILE *);
337 int ferror_unlocked(FILE *);
338 int fileno_unlocked(FILE *);
341 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE >= 500
342 int fseeko(FILE *, __off_t, int);
343 __off_t ftello(FILE *);
346 #if __BSD_VISIBLE || __XSI_VISIBLE > 0 && __XSI_VISIBLE < 600
348 int putw(int, FILE *);
349 #endif /* BSD or X/Open before issue 6 */
352 char *tempnam(const char *, const char *);
355 #if __POSIX_VISIBLE >= 200809
356 FILE *fmemopen(void * __restrict, size_t, const char * __restrict);
357 ssize_t getdelim(char ** __restrict, size_t * __restrict, int,
359 FILE *open_memstream(char **, size_t *);
360 int renameat(int, const char *, int, const char *);
361 int vdprintf(int, const char * __restrict, __va_list) __printflike(2, 0);
362 /* _WITH_GETLINE to allow pre 11 sources to build on 11+ systems */
363 ssize_t getline(char ** __restrict, size_t * __restrict, FILE * __restrict);
364 int dprintf(int, const char * __restrict, ...) __printflike(2, 3);
365 #endif /* __POSIX_VISIBLE >= 200809 */
368 * Routines that are purely local.
371 int asprintf(char **, const char *, ...) __printflike(2, 3);
372 char *ctermid_r(char *);
373 void fcloseall(void);
374 int fdclose(FILE *, int *);
375 char *fgetln(FILE *, size_t *);
376 const char *fmtcheck(const char *, const char *) __format_arg(2);
378 void setbuffer(FILE *, char *, int);
379 int setlinebuf(FILE *);
380 int vasprintf(char **, const char *, __va_list)
384 * The system error table contains messages for the first sys_nerr
385 * positive errno values. Use strerror() or strerror_r() from <string.h>
388 extern const int sys_nerr;
389 extern const char * const sys_errlist[];
392 * Stdio function-access interface.
394 FILE *funopen(const void *,
395 int (* _Nullable)(void *, char *, int),
396 int (* _Nullable)(void *, const char *, int),
397 fpos_t (* _Nullable)(void *, fpos_t, int),
398 int (* _Nullable)(void *));
399 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
400 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
402 typedef __ssize_t cookie_read_function_t(void *, char *, size_t);
403 typedef __ssize_t cookie_write_function_t(void *, const char *, size_t);
404 typedef int cookie_seek_function_t(void *, off64_t *, int);
405 typedef int cookie_close_function_t(void *);
407 cookie_read_function_t *read;
408 cookie_write_function_t *write;
409 cookie_seek_function_t *seek;
410 cookie_close_function_t *close;
411 } cookie_io_functions_t;
412 FILE *fopencookie(void *, const char *, cookie_io_functions_t);
415 * Portability hacks. See <sys/types.h>.
417 #ifndef _FTRUNCATE_DECLARED
418 #define _FTRUNCATE_DECLARED
419 int ftruncate(int, __off_t);
421 #ifndef _LSEEK_DECLARED
422 #define _LSEEK_DECLARED
423 __off_t lseek(int, __off_t, int);
425 #ifndef _MMAP_DECLARED
426 #define _MMAP_DECLARED
427 void *mmap(void *, size_t, int, int, int, __off_t);
429 #ifndef _TRUNCATE_DECLARED
430 #define _TRUNCATE_DECLARED
431 int truncate(const char *, __off_t);
433 #endif /* __BSD_VISIBLE */
436 * Functions internal to the implementation.
439 int __swbuf(int, FILE *);
442 * The __sfoo macros are here so that we can
443 * define function versions in the C library.
445 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
446 #if defined(__GNUC__) && defined(__STDC__)
447 static __inline int __sputc(int _c, FILE *_p) {
448 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
449 return (*_p->_p++ = _c);
451 return (__swbuf(_c, _p));
455 * This has been tuned to generate reasonable code on the vax using pcc.
457 #define __sputc(c, p) \
459 (p)->_w >= (p)->_lbfsize ? \
460 (*(p)->_p = (c)), *(p)->_p != '\n' ? \
463 __swbuf((int)(c), p) : \
464 (*(p)->_p = (c), (int)*(p)->_p++))
467 #ifndef __LIBC_ISTHREADED_DECLARED
468 #define __LIBC_ISTHREADED_DECLARED
469 extern int __isthreaded;
474 #define __sfeof(p) (((p)->_flags & __SEOF) != 0)
475 #define __sferror(p) (((p)->_flags & __SERR) != 0)
476 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
477 #define __sfileno(p) ((p)->_file)
480 #define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p))
481 #define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p))
482 #define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p))
485 #define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p))
488 #define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp))
489 #define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp))
491 #define getchar() getc(stdin)
492 #define putchar(x) putc(x, stdout)
496 * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12
497 * B.8.2.7 for the rationale behind the *_unlocked() macros.
499 #define feof_unlocked(p) __sfeof(p)
500 #define ferror_unlocked(p) __sferror(p)
501 #define clearerr_unlocked(p) __sclearerr(p)
502 #define fileno_unlocked(p) __sfileno(p)
504 #if __POSIX_VISIBLE >= 199506
505 #define getc_unlocked(fp) __sgetc(fp)
506 #define putc_unlocked(x, fp) __sputc(x, fp)
508 #define getchar_unlocked() getc_unlocked(stdin)
509 #define putchar_unlocked(x) putc_unlocked(x, stdout)
511 #endif /* __cplusplus */
514 __NULLABILITY_PRAGMA_POP
516 #endif /* !_STDIO_H_ */