1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 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. 23 * 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 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)stdio.h 8.5 (Berkeley) 4/29/95 37 * $FreeBSD$ 38 */ 39 40 #ifndef _STDIO_H_ 41 #define _STDIO_H_ 42 43 #include <sys/cdefs.h> 44 #include <sys/_null.h> 45 #include <sys/_types.h> 46 47 typedef __off_t fpos_t; 48 49 #ifndef _SIZE_T_DECLARED 50 typedef __size_t size_t; 51 #define _SIZE_T_DECLARED 52 #endif 53 54 #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200809 55 #ifndef _OFF_T_DECLARED 56 #define _OFF_T_DECLARED 57 typedef __off_t off_t; 58 #endif 59 #ifndef _SSIZE_T_DECLARED 60 #define _SSIZE_T_DECLARED 61 typedef __ssize_t ssize_t; 62 #endif 63 #endif 64 65 #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 66 #ifndef _VA_LIST_DECLARED 67 typedef __va_list va_list; 68 #define _VA_LIST_DECLARED 69 #endif 70 #endif 71 72 #define _FSTDIO /* Define for new stdio with functions. */ 73 74 /* 75 * NB: to fit things in six character monocase externals, the stdio 76 * code uses the prefix `__s' for stdio objects, typically followed 77 * by a three-character attempt at a mnemonic. 78 */ 79 80 /* stdio buffers */ 81 struct __sbuf { 82 unsigned char *_base; 83 int _size; 84 }; 85 86 /* 87 * stdio state variables. 88 * 89 * The following always hold: 90 * 91 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 92 * _lbfsize is -_bf._size, else _lbfsize is 0 93 * if _flags&__SRD, _w is 0 94 * if _flags&__SWR, _r is 0 95 * 96 * This ensures that the getc and putc macros (or inline functions) never 97 * try to write or read from a file that is in `read' or `write' mode. 98 * (Moreover, they can, and do, automatically switch from read mode to 99 * write mode, and back, on "r+" and "w+" files.) 100 * 101 * _lbfsize is used only to make the inline line-buffered output stream 102 * code as compact as possible. 103 * 104 * _ub, _up, and _ur are used when ungetc() pushes back more characters 105 * than fit in the current _bf, or when ungetc() pushes back a character 106 * that does not match the previous one in _bf. When this happens, 107 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 108 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 109 * 110 * Certain members of __sFILE are accessed directly via macros or 111 * inline functions. To preserve ABI compat, these members must not 112 * be disturbed. These members are marked below with (*). 113 */ 114 typedef struct __sFILE { 115 unsigned char *_p; /* (*) current position in (some) buffer */ 116 int _r; /* (*) read space left for getc() */ 117 int _w; /* (*) write space left for putc() */ 118 short _flags; /* (*) flags, below; this FILE is free if 0 */ 119 short _file; /* (*) fileno, if Unix descriptor, else -1 */ 120 struct __sbuf _bf; /* (*) the buffer (at least 1 byte, if !NULL) */ 121 int _lbfsize; /* (*) 0 or -_bf._size, for inline putc */ 122 123 /* operations */ 124 void *_cookie; /* (*) cookie passed to io functions */ 125 int (*_close)(void *); 126 int (*_read)(void *, char *, int); 127 fpos_t (*_seek)(void *, fpos_t, int); 128 int (*_write)(void *, const char *, int); 129 130 /* separate buffer for long sequences of ungetc() */ 131 struct __sbuf _ub; /* ungetc buffer */ 132 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 133 int _ur; /* saved _r when _r is counting ungetc data */ 134 135 /* tricks to meet minimum requirements even when malloc() fails */ 136 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ 137 unsigned char _nbuf[1]; /* guarantee a getc() buffer */ 138 139 /* separate buffer for fgetln() when line crosses buffer boundary */ 140 struct __sbuf _lb; /* buffer for fgetln() */ 141 142 /* Unix stdio files get aligned to block boundaries on fseek() */ 143 int _blksize; /* stat.st_blksize (may be != _bf._size) */ 144 fpos_t _offset; /* current lseek offset */ 145 146 struct pthread_mutex *_fl_mutex; /* used for MT-safety */ 147 struct pthread *_fl_owner; /* current owner */ 148 int _fl_count; /* recursive lock count */ 149 int _orientation; /* orientation for fwide() */ 150 __mbstate_t _mbstate; /* multibyte conversion state */ 151 } FILE; 152 153 #ifndef _STDSTREAM_DECLARED 154 __BEGIN_DECLS 155 extern FILE *__stdinp; 156 extern FILE *__stdoutp; 157 extern FILE *__stderrp; 158 __END_DECLS 159 #define _STDSTREAM_DECLARED 160 #endif 161 162 #define __SLBF 0x0001 /* line buffered */ 163 #define __SNBF 0x0002 /* unbuffered */ 164 #define __SRD 0x0004 /* OK to read */ 165 #define __SWR 0x0008 /* OK to write */ 166 /* RD and WR are never simultaneously asserted */ 167 #define __SRW 0x0010 /* open for reading & writing */ 168 #define __SEOF 0x0020 /* found EOF */ 169 #define __SERR 0x0040 /* found error */ 170 #define __SMBF 0x0080 /* _buf is from malloc */ 171 #define __SAPP 0x0100 /* fdopen()ed in append mode */ 172 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 173 #define __SOPT 0x0400 /* do fseek() optimization */ 174 #define __SNPT 0x0800 /* do not do fseek() optimization */ 175 #define __SOFF 0x1000 /* set iff _offset is in fact correct */ 176 #define __SMOD 0x2000 /* true => fgetln modified _p text */ 177 #define __SALC 0x4000 /* allocate string space dynamically */ 178 #define __SIGN 0x8000 /* ignore this file in _fwalk */ 179 180 /* 181 * The following three definitions are for ANSI C, which took them 182 * from System V, which brilliantly took internal interface macros and 183 * made them official arguments to setvbuf(), without renaming them. 184 * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 185 * 186 * Although numbered as their counterparts above, the implementation 187 * does not rely on this. 188 */ 189 #define _IOFBF 0 /* setvbuf should set fully buffered */ 190 #define _IOLBF 1 /* setvbuf should set line buffered */ 191 #define _IONBF 2 /* setvbuf should set unbuffered */ 192 193 #define BUFSIZ 1024 /* size of buffer used by setbuf */ 194 #define EOF (-1) 195 196 /* 197 * FOPEN_MAX is a minimum maximum, and is the number of streams that 198 * stdio can provide without attempting to allocate further resources 199 * (which could fail). Do not use this for anything. 200 */ 201 /* must be == _POSIX_STREAM_MAX <limits.h> */ 202 #ifndef FOPEN_MAX 203 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 204 #endif 205 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 206 207 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 208 #if __XSI_VISIBLE 209 #define P_tmpdir "/var/tmp/" 210 #endif 211 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 212 #define TMP_MAX 308915776 213 214 #ifndef SEEK_SET 215 #define SEEK_SET 0 /* set file offset to offset */ 216 #endif 217 #ifndef SEEK_CUR 218 #define SEEK_CUR 1 /* set file offset to current plus offset */ 219 #endif 220 #ifndef SEEK_END 221 #define SEEK_END 2 /* set file offset to EOF plus offset */ 222 #endif 223 224 #define stdin __stdinp 225 #define stdout __stdoutp 226 #define stderr __stderrp 227 228 __BEGIN_DECLS 229 /* 230 * Functions defined in ANSI C standard. 231 */ 232 void clearerr(FILE *); 233 int fclose(FILE *); 234 int feof(FILE *); 235 int ferror(FILE *); 236 int fflush(FILE *); 237 int fgetc(FILE *); 238 int fgetpos(FILE * __restrict, fpos_t * __restrict); 239 char *fgets(char * __restrict, int, FILE * __restrict); 240 FILE *fopen(const char * __restrict, const char * __restrict); 241 int fprintf(FILE * __restrict, const char * __restrict, ...); 242 int fputc(int, FILE *); 243 int fputs(const char * __restrict, FILE * __restrict); 244 size_t fread(void * __restrict, size_t, size_t, FILE * __restrict); 245 FILE *freopen(const char * __restrict, const char * __restrict, FILE * __restrict); 246 int fscanf(FILE * __restrict, const char * __restrict, ...); 247 int fseek(FILE *, long, int); 248 int fsetpos(FILE *, const fpos_t *); 249 long ftell(FILE *); 250 size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict); 251 int getc(FILE *); 252 int getchar(void); 253 char *gets(char *); 254 void perror(const char *); 255 int printf(const char * __restrict, ...); 256 int putc(int, FILE *); 257 int putchar(int); 258 int puts(const char *); 259 int remove(const char *); 260 int rename(const char *, const char *); 261 void rewind(FILE *); 262 int scanf(const char * __restrict, ...); 263 void setbuf(FILE * __restrict, char * __restrict); 264 int setvbuf(FILE * __restrict, char * __restrict, int, size_t); 265 int sprintf(char * __restrict, const char * __restrict, ...); 266 int sscanf(const char * __restrict, const char * __restrict, ...); 267 FILE *tmpfile(void); 268 char *tmpnam(char *); 269 int ungetc(int, FILE *); 270 int vfprintf(FILE * __restrict, const char * __restrict, 271 __va_list); 272 int vprintf(const char * __restrict, __va_list); 273 int vsprintf(char * __restrict, const char * __restrict, 274 __va_list); 275 276 #if __ISO_C_VISIBLE >= 1999 277 int snprintf(char * __restrict, size_t, const char * __restrict, 278 ...) __printflike(3, 4); 279 int vfscanf(FILE * __restrict, const char * __restrict, __va_list) 280 __scanflike(2, 0); 281 int vscanf(const char * __restrict, __va_list) __scanflike(1, 0); 282 int vsnprintf(char * __restrict, size_t, const char * __restrict, 283 __va_list) __printflike(3, 0); 284 int vsscanf(const char * __restrict, const char * __restrict, __va_list) 285 __scanflike(2, 0); 286 #endif 287 288 /* 289 * Functions defined in all versions of POSIX 1003.1. 290 */ 291 #if __BSD_VISIBLE || __POSIX_VISIBLE <= 199506 292 /* size for cuserid(3); UT_NAMESIZE + 1, see <utmp.h> */ 293 #define L_cuserid 17 /* legacy */ 294 #endif 295 296 #if __POSIX_VISIBLE 297 #define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */ 298 299 char *ctermid(char *); 300 FILE *fdopen(int, const char *); 301 int fileno(FILE *); 302 #endif /* __POSIX_VISIBLE */ 303 304 #if __POSIX_VISIBLE >= 199209 305 int pclose(FILE *); 306 FILE *popen(const char *, const char *); 307 #endif 308 309 #if __POSIX_VISIBLE >= 199506 310 int ftrylockfile(FILE *); 311 void flockfile(FILE *); 312 void funlockfile(FILE *); 313 314 /* 315 * These are normally used through macros as defined below, but POSIX 316 * requires functions as well. 317 */ 318 int getc_unlocked(FILE *); 319 int getchar_unlocked(void); 320 int putc_unlocked(int, FILE *); 321 int putchar_unlocked(int); 322 #endif 323 #if __BSD_VISIBLE 324 void clearerr_unlocked(FILE *); 325 int feof_unlocked(FILE *); 326 int ferror_unlocked(FILE *); 327 int fileno_unlocked(FILE *); 328 #endif 329 330 #if __POSIX_VISIBLE >= 200112 331 int fseeko(FILE *, __off_t, int); 332 __off_t ftello(FILE *); 333 #endif 334 335 #if __BSD_VISIBLE || __XSI_VISIBLE > 0 && __XSI_VISIBLE < 600 336 int getw(FILE *); 337 int putw(int, FILE *); 338 #endif /* BSD or X/Open before issue 6 */ 339 340 #if __XSI_VISIBLE 341 char *tempnam(const char *, const char *); 342 #endif 343 344 #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200809 345 ssize_t getdelim(char ** __restrict, size_t * __restrict, int, 346 FILE * __restrict); 347 348 /* 349 * Every programmer and his dog wrote functions called getline() 350 * before POSIX.1-2008 came along and decided to usurp the name, so we 351 * don't prototype getline() by default unless one of the following is true: 352 * a) the app has requested it specifically by defining _WITH_GETLINE 353 * b) the app has requested a POSIX.1-2008 environment via _POSIX_C_SOURCE 354 * c) the app defines a GNUism such as _BSD_SOURCE or _GNU_SOURCE 355 */ 356 #ifndef _WITH_GETLINE 357 #if defined(_BSD_SOURCE) || defined(_GNU_SOURCE) 358 #define _WITH_GETLINE 359 #elif defined(_POSIX_C_SOURCE) 360 #if _POSIX_C_SOURCE > 200809 361 #define _WITH_GETLINE 362 #endif 363 #endif 364 #endif 365 366 #ifdef _WITH_GETLINE 367 ssize_t getline(char ** __restrict, size_t * __restrict, FILE * __restrict); 368 #endif 369 370 #endif /* __BSD_VISIBLE || __POSIX_VISIBLE >= 200809 */ 371 372 /* 373 * Routines that are purely local. 374 */ 375 #if __BSD_VISIBLE 376 int asprintf(char **, const char *, ...) __printflike(2, 3); 377 char *ctermid_r(char *); 378 void fcloseall(void); 379 char *fgetln(FILE *, size_t *); 380 __const char *fmtcheck(const char *, const char *) __format_arg(2); 381 int fpurge(FILE *); 382 int renameat(int, const char *, int, const char *); 383 void setbuffer(FILE *, char *, int); 384 int setlinebuf(FILE *); 385 int vasprintf(char **, const char *, __va_list) 386 __printflike(2, 0); 387 388 /* 389 * The system error table contains messages for the first sys_nerr 390 * positive errno values. Use strerror() or strerror_r() from <string.h> 391 * instead. 392 */ 393 extern __const int sys_nerr; 394 extern __const char *__const sys_errlist[]; 395 396 /* 397 * Stdio function-access interface. 398 */ 399 FILE *funopen(const void *, 400 int (*)(void *, char *, int), 401 int (*)(void *, const char *, int), 402 fpos_t (*)(void *, fpos_t, int), 403 int (*)(void *)); 404 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 405 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 406 407 /* 408 * Portability hacks. See <sys/types.h>. 409 */ 410 #ifndef _FTRUNCATE_DECLARED 411 #define _FTRUNCATE_DECLARED 412 int ftruncate(int, __off_t); 413 #endif 414 #ifndef _LSEEK_DECLARED 415 #define _LSEEK_DECLARED 416 __off_t lseek(int, __off_t, int); 417 #endif 418 #ifndef _MMAP_DECLARED 419 #define _MMAP_DECLARED 420 void *mmap(void *, size_t, int, int, int, __off_t); 421 #endif 422 #ifndef _TRUNCATE_DECLARED 423 #define _TRUNCATE_DECLARED 424 int truncate(const char *, __off_t); 425 #endif 426 #endif /* __BSD_VISIBLE */ 427 428 /* 429 * Functions internal to the implementation. 430 */ 431 int __srget(FILE *); 432 int __swbuf(int, FILE *); 433 434 /* 435 * The __sfoo macros are here so that we can 436 * define function versions in the C library. 437 */ 438 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 439 #if defined(__GNUC__) && defined(__STDC__) 440 static __inline int __sputc(int _c, FILE *_p) { 441 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 442 return (*_p->_p++ = _c); 443 else 444 return (__swbuf(_c, _p)); 445 } 446 #else 447 /* 448 * This has been tuned to generate reasonable code on the vax using pcc. 449 */ 450 #define __sputc(c, p) \ 451 (--(p)->_w < 0 ? \ 452 (p)->_w >= (p)->_lbfsize ? \ 453 (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 454 (int)*(p)->_p++ : \ 455 __swbuf('\n', p) : \ 456 __swbuf((int)(c), p) : \ 457 (*(p)->_p = (c), (int)*(p)->_p++)) 458 #endif 459 460 #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 461 #define __sferror(p) (((p)->_flags & __SERR) != 0) 462 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 463 #define __sfileno(p) ((p)->_file) 464 465 extern int __isthreaded; 466 467 #define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p)) 468 #define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p)) 469 #define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p)) 470 471 #if __POSIX_VISIBLE 472 #define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p)) 473 #endif 474 475 #define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp)) 476 #define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp)) 477 478 #define getchar() getc(stdin) 479 #define putchar(x) putc(x, stdout) 480 481 #if __BSD_VISIBLE 482 /* 483 * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12 484 * B.8.2.7 for the rationale behind the *_unlocked() macros. 485 */ 486 #define feof_unlocked(p) __sfeof(p) 487 #define ferror_unlocked(p) __sferror(p) 488 #define clearerr_unlocked(p) __sclearerr(p) 489 #define fileno_unlocked(p) __sfileno(p) 490 #endif 491 #if __POSIX_VISIBLE >= 199506 492 #define getc_unlocked(fp) __sgetc(fp) 493 #define putc_unlocked(x, fp) __sputc(x, fp) 494 495 #define getchar_unlocked() getc_unlocked(stdin) 496 #define putchar_unlocked(x) putc_unlocked(x, stdout) 497 #endif 498 499 __END_DECLS 500 #endif /* !_STDIO_H_ */ 501