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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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36 * @(#)stdio.h 8.5 (Berkeley) 4/29/95
43 #include <sys/cdefs.h>
44 #include <sys/_null.h>
45 #include <sys/_types.h>
47 typedef __off_t fpos_t;
49 #ifndef _SIZE_T_DECLARED
50 typedef __size_t size_t;
51 #define _SIZE_T_DECLARED
54 #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
55 #ifndef _VA_LIST_DECLARED
56 typedef __va_list va_list;
57 #define _VA_LIST_DECLARED
61 #define _FSTDIO /* Define for new stdio with functions. */
64 * NB: to fit things in six character monocase externals, the stdio
65 * code uses the prefix `__s' for stdio objects, typically followed
66 * by a three-character attempt at a mnemonic.
75 /* hold a buncha junk that would grow the ABI */
79 * stdio state variables.
81 * The following always hold:
83 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
84 * _lbfsize is -_bf._size, else _lbfsize is 0
85 * if _flags&__SRD, _w is 0
86 * if _flags&__SWR, _r is 0
88 * This ensures that the getc and putc macros (or inline functions) never
89 * try to write or read from a file that is in `read' or `write' mode.
90 * (Moreover, they can, and do, automatically switch from read mode to
91 * write mode, and back, on "r+" and "w+" files.)
93 * _lbfsize is used only to make the inline line-buffered output stream
94 * code as compact as possible.
96 * _ub, _up, and _ur are used when ungetc() pushes back more characters
97 * than fit in the current _bf, or when ungetc() pushes back a character
98 * that does not match the previous one in _bf. When this happens,
99 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
100 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
102 * NB: see WARNING above before changing the layout of this structure!
104 typedef struct __sFILE {
105 unsigned char *_p; /* current position in (some) buffer */
106 int _r; /* read space left for getc() */
107 int _w; /* write space left for putc() */
108 short _flags; /* flags, below; this FILE is free if 0 */
109 short _file; /* fileno, if Unix descriptor, else -1 */
110 struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
111 int _lbfsize; /* 0 or -_bf._size, for inline putc */
114 void *_cookie; /* cookie passed to io functions */
115 int (*_close)(void *);
116 int (*_read)(void *, char *, int);
117 fpos_t (*_seek)(void *, fpos_t, int);
118 int (*_write)(void *, const char *, int);
120 /* separate buffer for long sequences of ungetc() */
121 struct __sbuf _ub; /* ungetc buffer */
122 struct __sFILEX *_extra; /* additions to FILE to not break ABI */
123 int _ur; /* saved _r when _r is counting ungetc data */
125 /* tricks to meet minimum requirements even when malloc() fails */
126 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
127 unsigned char _nbuf[1]; /* guarantee a getc() buffer */
129 /* separate buffer for fgetln() when line crosses buffer boundary */
130 struct __sbuf _lb; /* buffer for fgetln() */
132 /* Unix stdio files get aligned to block boundaries on fseek() */
133 int _blksize; /* stat.st_blksize (may be != _bf._size) */
134 fpos_t _offset; /* current lseek offset (see WARNING) */
138 extern FILE *__stdinp;
139 extern FILE *__stdoutp;
140 extern FILE *__stderrp;
143 #define __SLBF 0x0001 /* line buffered */
144 #define __SNBF 0x0002 /* unbuffered */
145 #define __SRD 0x0004 /* OK to read */
146 #define __SWR 0x0008 /* OK to write */
147 /* RD and WR are never simultaneously asserted */
148 #define __SRW 0x0010 /* open for reading & writing */
149 #define __SEOF 0x0020 /* found EOF */
150 #define __SERR 0x0040 /* found error */
151 #define __SMBF 0x0080 /* _buf is from malloc */
152 #define __SAPP 0x0100 /* fdopen()ed in append mode */
153 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */
154 #define __SOPT 0x0400 /* do fseek() optimization */
155 #define __SNPT 0x0800 /* do not do fseek() optimization */
156 #define __SOFF 0x1000 /* set iff _offset is in fact correct */
157 #define __SMOD 0x2000 /* true => fgetln modified _p text */
158 #define __SALC 0x4000 /* allocate string space dynamically */
159 #define __SIGN 0x8000 /* ignore this file in _fwalk */
162 * The following three definitions are for ANSI C, which took them
163 * from System V, which brilliantly took internal interface macros and
164 * made them official arguments to setvbuf(), without renaming them.
165 * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
167 * Although numbered as their counterparts above, the implementation
168 * does not rely on this.
170 #define _IOFBF 0 /* setvbuf should set fully buffered */
171 #define _IOLBF 1 /* setvbuf should set line buffered */
172 #define _IONBF 2 /* setvbuf should set unbuffered */
174 #define BUFSIZ 1024 /* size of buffer used by setbuf */
178 * FOPEN_MAX is a minimum maximum, and is the number of streams that
179 * stdio can provide without attempting to allocate further resources
180 * (which could fail). Do not use this for anything.
182 /* must be == _POSIX_STREAM_MAX <limits.h> */
183 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */
184 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */
186 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
188 #define P_tmpdir "/var/tmp/"
190 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */
191 #define TMP_MAX 308915776
194 #define SEEK_SET 0 /* set file offset to offset */
197 #define SEEK_CUR 1 /* set file offset to current plus offset */
200 #define SEEK_END 2 /* set file offset to EOF plus offset */
203 #define stdin __stdinp
204 #define stdout __stdoutp
205 #define stderr __stderrp
209 * Functions defined in ANSI C standard.
211 void clearerr(FILE *);
217 int fgetpos(FILE * __restrict, fpos_t * __restrict);
218 char *fgets(char * __restrict, int, FILE * __restrict);
219 FILE *fopen(const char * __restrict, const char * __restrict);
220 int fprintf(FILE * __restrict, const char * __restrict, ...);
221 int fputc(int, FILE *);
222 int fputs(const char * __restrict, FILE * __restrict);
223 size_t fread(void * __restrict, size_t, size_t, FILE * __restrict);
224 FILE *freopen(const char * __restrict, const char * __restrict, FILE * __restrict);
225 int fscanf(FILE * __restrict, const char * __restrict, ...);
226 int fseek(FILE *, long, int);
227 int fsetpos(FILE *, const fpos_t *);
229 size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict);
233 void perror(const char *);
234 int printf(const char * __restrict, ...);
235 int putc(int, FILE *);
237 int puts(const char *);
238 int remove(const char *);
239 int rename(const char *, const char *);
241 int scanf(const char * __restrict, ...);
242 void setbuf(FILE * __restrict, char * __restrict);
243 int setvbuf(FILE * __restrict, char * __restrict, int, size_t);
244 int sprintf(char * __restrict, const char * __restrict, ...);
245 int sscanf(const char * __restrict, const char * __restrict, ...);
247 char *tmpnam(char *);
248 int ungetc(int, FILE *);
249 int vfprintf(FILE * __restrict, const char * __restrict,
251 int vprintf(const char * __restrict, __va_list);
252 int vsprintf(char * __restrict, const char * __restrict,
255 #if __ISO_C_VISIBLE >= 1999
256 int snprintf(char * __restrict, size_t, const char * __restrict,
257 ...) __printflike(3, 4);
258 int vfscanf(FILE * __restrict, const char * __restrict, __va_list)
260 int vscanf(const char * __restrict, __va_list) __scanflike(1, 0);
261 int vsnprintf(char * __restrict, size_t, const char * __restrict,
262 __va_list) __printflike(3, 0);
263 int vsscanf(const char * __restrict, const char * __restrict, __va_list)
268 * Functions defined in all versions of POSIX 1003.1.
270 #if __BSD_VISIBLE || __POSIX_VISIBLE <= 199506
271 /* size for cuserid(3); UT_NAMESIZE + 1, see <utmp.h> */
272 #define L_cuserid 17 /* legacy */
276 #define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */
278 char *ctermid(char *);
279 FILE *fdopen(int, const char *);
281 #endif /* __POSIX_VISIBLE */
283 #if __POSIX_VISIBLE >= 199209
285 FILE *popen(const char *, const char *);
288 #if __POSIX_VISIBLE >= 199506
289 int ftrylockfile(FILE *);
290 void flockfile(FILE *);
291 void funlockfile(FILE *);
294 * These are normally used through macros as defined below, but POSIX
295 * requires functions as well.
297 int getc_unlocked(FILE *);
298 int getchar_unlocked(void);
299 int putc_unlocked(int, FILE *);
300 int putchar_unlocked(int);
303 void clearerr_unlocked(FILE *);
304 int feof_unlocked(FILE *);
305 int ferror_unlocked(FILE *);
306 int fileno_unlocked(FILE *);
309 #if __POSIX_VISIBLE >= 200112
310 int fseeko(FILE *, __off_t, int);
311 __off_t ftello(FILE *);
314 #if __BSD_VISIBLE || __XSI_VISIBLE > 0 && __XSI_VISIBLE < 600
316 int putw(int, FILE *);
317 #endif /* BSD or X/Open before issue 6 */
320 char *tempnam(const char *, const char *);
324 * Routines that are purely local.
327 int asprintf(char **, const char *, ...) __printflike(2, 3);
328 char *ctermid_r(char *);
329 char *fgetln(FILE *, size_t *);
330 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3
331 #define __ATTR_FORMAT_ARG __attribute__((__format_arg__(2)))
333 #define __ATTR_FORMAT_ARG
335 __const char *fmtcheck(const char *, const char *) __ATTR_FORMAT_ARG;
337 void setbuffer(FILE *, char *, int);
338 int setlinebuf(FILE *);
339 int vasprintf(char **, const char *, __va_list)
343 * The system error table contains messages for the first sys_nerr
344 * positive errno values. Use strerror() or strerror_r() from <string.h>
347 extern __const int sys_nerr;
348 extern __const char *__const sys_errlist[];
351 * Stdio function-access interface.
353 FILE *funopen(const void *,
354 int (*)(void *, char *, int),
355 int (*)(void *, const char *, int),
356 fpos_t (*)(void *, fpos_t, int),
358 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
359 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
362 * Portability hacks. See <sys/types.h>.
364 #ifndef _FTRUNCATE_DECLARED
365 #define _FTRUNCATE_DECLARED
366 int ftruncate(int, __off_t);
368 #ifndef _LSEEK_DECLARED
369 #define _LSEEK_DECLARED
370 __off_t lseek(int, __off_t, int);
372 #ifndef _MMAP_DECLARED
373 #define _MMAP_DECLARED
374 void *mmap(void *, size_t, int, int, int, __off_t);
376 #ifndef _TRUNCATE_DECLARED
377 #define _TRUNCATE_DECLARED
378 int truncate(const char *, __off_t);
380 #endif /* __BSD_VISIBLE */
383 * Functions internal to the implementation.
386 int __swbuf(int, FILE *);
389 * The __sfoo macros are here so that we can
390 * define function versions in the C library.
392 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
393 #if defined(__GNUC__) && defined(__STDC__)
394 static __inline int __sputc(int _c, FILE *_p) {
395 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
396 return (*_p->_p++ = _c);
398 return (__swbuf(_c, _p));
402 * This has been tuned to generate reasonable code on the vax using pcc.
404 #define __sputc(c, p) \
406 (p)->_w >= (p)->_lbfsize ? \
407 (*(p)->_p = (c)), *(p)->_p != '\n' ? \
410 __swbuf((int)(c), p) : \
411 (*(p)->_p = (c), (int)*(p)->_p++))
414 #define __sfeof(p) (((p)->_flags & __SEOF) != 0)
415 #define __sferror(p) (((p)->_flags & __SERR) != 0)
416 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
417 #define __sfileno(p) ((p)->_file)
419 extern int __isthreaded;
421 #define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p))
422 #define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p))
423 #define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p))
426 #define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p))
429 #define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp))
430 #define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp))
432 #define getchar() getc(stdin)
433 #define putchar(x) putc(x, stdout)
437 * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12
438 * B.8.2.7 for the rationale behind the *_unlocked() macros.
440 #define feof_unlocked(p) __sfeof(p)
441 #define ferror_unlocked(p) __sferror(p)
442 #define clearerr_unlocked(p) __sclearerr(p)
443 #define fileno_unlocked(p) __sfileno(p)
445 #if __POSIX_VISIBLE >= 199506
446 #define getc_unlocked(fp) __sgetc(fp)
447 #define putc_unlocked(x, fp) __sputc(x, fp)
449 #define getchar_unlocked() getc_unlocked(stdin)
450 #define putchar_unlocked(x) putc_unlocked(x, stdout)
454 #endif /* !_STDIO_H_ */