1 /* $OpenBSD: stdio.h,v 1.35 2006/01/13 18:10:09 miod Exp $ */ 2 /* $NetBSD: stdio.h,v 1.18 1996/04/25 18:29:21 jtc Exp $ */ 3 4 /*- 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Chris Torek. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)stdio.h 5.17 (Berkeley) 6/3/91 36 */ 37 38 #ifndef _STDIO_H_ 39 #define _STDIO_H_ 40 41 #include <sys/cdefs.h> 42 #include <sys/_types.h> 43 44 /* va_list and size_t must be defined by stdio.h according to Posix */ 45 #define __need___va_list 46 #include <stdarg.h> 47 48 /* note that this forces stddef.h to *only* define size_t */ 49 #define __need_size_t 50 #include <stddef.h> 51 52 #include <stddef.h> 53 54 #if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE 55 #include <sys/types.h> /* XXX should be removed */ 56 #endif 57 58 #ifndef _SIZE_T_DEFINED_ 59 #define _SIZE_T_DEFINED_ 60 typedef unsigned long size_t; 61 #endif 62 63 #ifndef _OFF_T_DEFINED_ 64 #define _OFF_T_DEFINED_ 65 typedef long off_t; 66 #endif 67 68 #ifndef NULL 69 #ifdef __GNUG__ 70 #define NULL __null 71 #else 72 #define NULL 0L 73 #endif 74 #endif 75 76 #define _FSTDIO /* Define for new stdio with functions. */ 77 78 typedef off_t fpos_t; /* stdio file position type */ 79 80 /* 81 * NB: to fit things in six character monocase externals, the stdio 82 * code uses the prefix `__s' for stdio objects, typically followed 83 * by a three-character attempt at a mnemonic. 84 */ 85 86 /* stdio buffers */ 87 struct __sbuf { 88 unsigned char *_base; 89 int _size; 90 }; 91 92 /* 93 * stdio state variables. 94 * 95 * The following always hold: 96 * 97 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 98 * _lbfsize is -_bf._size, else _lbfsize is 0 99 * if _flags&__SRD, _w is 0 100 * if _flags&__SWR, _r is 0 101 * 102 * This ensures that the getc and putc macros (or inline functions) never 103 * try to write or read from a file that is in `read' or `write' mode. 104 * (Moreover, they can, and do, automatically switch from read mode to 105 * write mode, and back, on "r+" and "w+" files.) 106 * 107 * _lbfsize is used only to make the inline line-buffered output stream 108 * code as compact as possible. 109 * 110 * _ub, _up, and _ur are used when ungetc() pushes back more characters 111 * than fit in the current _bf, or when ungetc() pushes back a character 112 * that does not match the previous one in _bf. When this happens, 113 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 114 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 115 * 116 * NOTE: if you change this structure, you also need to update the 117 * std() initializer in findfp.c. 118 */ 119 typedef struct __sFILE { 120 unsigned char *_p; /* current position in (some) buffer */ 121 int _r; /* read space left for getc() */ 122 int _w; /* write space left for putc() */ 123 short _flags; /* flags, below; this FILE is free if 0 */ 124 short _file; /* fileno, if Unix descriptor, else -1 */ 125 struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ 126 int _lbfsize; /* 0 or -_bf._size, for inline putc */ 127 128 /* operations */ 129 void *_cookie; /* cookie passed to io functions */ 130 int (*_close)(void *); 131 int (*_read)(void *, char *, int); 132 fpos_t (*_seek)(void *, fpos_t, int); 133 int (*_write)(void *, const char *, int); 134 135 /* extension data, to avoid further ABI breakage */ 136 struct __sbuf _ext; 137 /* data for long sequences of ungetc() */ 138 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 139 int _ur; /* saved _r when _r is counting ungetc data */ 140 141 /* tricks to meet minimum requirements even when malloc() fails */ 142 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ 143 unsigned char _nbuf[1]; /* guarantee a getc() buffer */ 144 145 /* separate buffer for fgetln() when line crosses buffer boundary */ 146 struct __sbuf _lb; /* buffer for fgetln() */ 147 148 /* Unix stdio files get aligned to block boundaries on fseek() */ 149 int _blksize; /* stat.st_blksize (may be != _bf._size) */ 150 fpos_t _offset; /* current lseek offset */ 151 } FILE; 152 153 __BEGIN_DECLS 154 extern FILE __sF[]; 155 __END_DECLS 156 157 #define __SLBF 0x0001 /* line buffered */ 158 #define __SNBF 0x0002 /* unbuffered */ 159 #define __SRD 0x0004 /* OK to read */ 160 #define __SWR 0x0008 /* OK to write */ 161 /* RD and WR are never simultaneously asserted */ 162 #define __SRW 0x0010 /* open for reading & writing */ 163 #define __SEOF 0x0020 /* found EOF */ 164 #define __SERR 0x0040 /* found error */ 165 #define __SMBF 0x0080 /* _buf is from malloc */ 166 #define __SAPP 0x0100 /* fdopen()ed in append mode */ 167 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 168 #define __SOPT 0x0400 /* do fseek() optimisation */ 169 #define __SNPT 0x0800 /* do not do fseek() optimisation */ 170 #define __SOFF 0x1000 /* set iff _offset is in fact correct */ 171 #define __SMOD 0x2000 /* true => fgetln modified _p text */ 172 #define __SALC 0x4000 /* allocate string space dynamically */ 173 #define __SIGN 0x8000 /* ignore this file in _fwalk */ 174 175 /* 176 * The following three definitions are for ANSI C, which took them 177 * from System V, which brilliantly took internal interface macros and 178 * made them official arguments to setvbuf(), without renaming them. 179 * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 180 * 181 * Although numbered as their counterparts above, the implementation 182 * does not rely on this. 183 */ 184 #define _IOFBF 0 /* setvbuf should set fully buffered */ 185 #define _IOLBF 1 /* setvbuf should set line buffered */ 186 #define _IONBF 2 /* setvbuf should set unbuffered */ 187 188 #define BUFSIZ 1024 /* size of buffer used by setbuf */ 189 190 #define EOF (-1) 191 192 /* 193 * FOPEN_MAX is a minimum maximum, and should be the number of descriptors 194 * that the kernel can provide without allocation of a resource that can 195 * fail without the process sleeping. Do not use this for anything. 196 */ 197 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 198 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 199 200 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 201 #if __BSD_VISIBLE || __XPG_VISIBLE 202 #define P_tmpdir "/tmp/" 203 #endif 204 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 205 #define TMP_MAX 308915776 206 207 #ifndef SEEK_SET 208 #define SEEK_SET 0 /* set file offset to offset */ 209 #endif 210 #ifndef SEEK_CUR 211 #define SEEK_CUR 1 /* set file offset to current plus offset */ 212 #endif 213 #ifndef SEEK_END 214 #define SEEK_END 2 /* set file offset to EOF plus offset */ 215 #endif 216 217 #define stdin (&__sF[0]) 218 #define stdout (&__sF[1]) 219 #define stderr (&__sF[2]) 220 221 /* 222 * Functions defined in ANSI C standard. 223 */ 224 __BEGIN_DECLS 225 void clearerr(FILE *); 226 int fclose(FILE *); 227 int feof(FILE *); 228 int ferror(FILE *); 229 int fflush(FILE *); 230 int fgetc(FILE *); 231 int fgetpos(FILE *, fpos_t *); 232 char *fgets(char *, int, FILE *); 233 FILE *fopen(const char *, const char *); 234 int fprintf(FILE *, const char *, ...); 235 int fputc(int, FILE *); 236 int fputs(const char *, FILE *); 237 size_t fread(void *, size_t, size_t, FILE *); 238 FILE *freopen(const char *, const char *, FILE *); 239 int fscanf(FILE *, const char *, ...); 240 int fseek(FILE *, long, int); 241 int fseeko(FILE *, off_t, int); 242 int fsetpos(FILE *, const fpos_t *); 243 long ftell(FILE *); 244 off_t ftello(FILE *); 245 size_t fwrite(const void *, size_t, size_t, FILE *); 246 int getc(FILE *); 247 int getchar(void); 248 char *gets(char *); 249 #if __BSD_VISIBLE && !defined(__SYS_ERRLIST) 250 #define __SYS_ERRLIST 251 252 extern int sys_nerr; /* perror(3) external variables */ 253 extern char *sys_errlist[]; 254 #endif 255 void perror(const char *); 256 int printf(const char *, ...); 257 int putc(int, FILE *); 258 int putchar(int); 259 int puts(const char *); 260 int remove(const char *); 261 int rename(const char *, const char *); 262 void rewind(FILE *); 263 int scanf(const char *, ...); 264 void setbuf(FILE *, char *); 265 int setvbuf(FILE *, char *, int, size_t); 266 int sprintf(char *, const char *, ...); 267 int sscanf(const char *, const char *, ...); 268 FILE *tmpfile(void); 269 char *tmpnam(char *); 270 int ungetc(int, FILE *); 271 int vfprintf(FILE *, const char *, __va_list); 272 int vprintf(const char *, __va_list); 273 int vsprintf(char *, const char *, __va_list); 274 275 #if __ISO_C_VISIBLE >= 1999 || __BSD_VISIBLE 276 int snprintf(char *, size_t, const char *, ...) 277 __attribute__((__format__ (printf, 3, 4))) 278 __attribute__((__nonnull__ (3))); 279 int vfscanf(FILE *, const char *, __va_list) 280 __attribute__((__format__ (scanf, 2, 0))) 281 __attribute__((__nonnull__ (2))); 282 int vscanf(const char *, __va_list) 283 __attribute__((__format__ (scanf, 1, 0))) 284 __attribute__((__nonnull__ (1))); 285 int vsnprintf(char *, size_t, const char *, __va_list) 286 __attribute__((__format__ (printf, 3, 0))) 287 __attribute__((__nonnull__ (3))); 288 int vsscanf(const char *, const char *, __va_list) 289 __attribute__((__format__ (scanf, 2, 0))) 290 __attribute__((__nonnull__ (2))); 291 #endif /* __ISO_C_VISIBLE >= 1999 || __BSD_VISIBLE */ 292 293 __END_DECLS 294 295 296 /* 297 * Functions defined in POSIX 1003.1. 298 */ 299 #if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE 300 #define L_ctermid 1024 /* size for ctermid(); PATH_MAX */ 301 #define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */ 302 303 __BEGIN_DECLS 304 #if 0 /* MISSING FROM BIONIC */ 305 char *ctermid(char *); 306 char *cuserid(char *); 307 #endif /* MISSING */ 308 FILE *fdopen(int, const char *); 309 int fileno(FILE *); 310 311 #if (__POSIX_VISIBLE >= 199209) 312 int pclose(FILE *); 313 FILE *popen(const char *, const char *); 314 #endif 315 316 #if __POSIX_VISIBLE >= 199506 317 void flockfile(FILE *); 318 int ftrylockfile(FILE *); 319 void funlockfile(FILE *); 320 321 /* 322 * These are normally used through macros as defined below, but POSIX 323 * requires functions as well. 324 */ 325 int getc_unlocked(FILE *); 326 int getchar_unlocked(void); 327 int putc_unlocked(int, FILE *); 328 int putchar_unlocked(int); 329 #endif /* __POSIX_VISIBLE >= 199506 */ 330 331 #if __XPG_VISIBLE 332 char *tempnam(const char *, const char *); 333 #endif 334 __END_DECLS 335 336 #endif /* __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE */ 337 338 /* 339 * Routines that are purely local. 340 */ 341 #if __BSD_VISIBLE 342 __BEGIN_DECLS 343 int asprintf(char **, const char *, ...) 344 __attribute__((__format__ (printf, 2, 3))) 345 __attribute__((__nonnull__ (2))); 346 char *fgetln(FILE *, size_t *); 347 int fpurge(FILE *); 348 int getw(FILE *); 349 int putw(int, FILE *); 350 void setbuffer(FILE *, char *, int); 351 int setlinebuf(FILE *); 352 int vasprintf(char **, const char *, __va_list) 353 __attribute__((__format__ (printf, 2, 0))) 354 __attribute__((__nonnull__ (2))); 355 __END_DECLS 356 357 /* 358 * Stdio function-access interface. 359 */ 360 __BEGIN_DECLS 361 FILE *funopen(const void *, 362 int (*)(void *, char *, int), 363 int (*)(void *, const char *, int), 364 fpos_t (*)(void *, fpos_t, int), 365 int (*)(void *)); 366 __END_DECLS 367 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 368 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 369 #endif /* __BSD_VISIBLE */ 370 371 /* 372 * Functions internal to the implementation. 373 */ 374 __BEGIN_DECLS 375 int __srget(FILE *); 376 int __swbuf(int, FILE *); 377 __END_DECLS 378 379 /* 380 * The __sfoo macros are here so that we can 381 * define function versions in the C library. 382 */ 383 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 384 #if defined(__GNUC__) 385 static __inline int __sputc(int _c, FILE *_p) { 386 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 387 return (*_p->_p++ = _c); 388 else 389 return (__swbuf(_c, _p)); 390 } 391 #else 392 /* 393 * This has been tuned to generate reasonable code on the vax using pcc. 394 */ 395 #define __sputc(c, p) \ 396 (--(p)->_w < 0 ? \ 397 (p)->_w >= (p)->_lbfsize ? \ 398 (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 399 (int)*(p)->_p++ : \ 400 __swbuf('\n', p) : \ 401 __swbuf((int)(c), p) : \ 402 (*(p)->_p = (c), (int)*(p)->_p++)) 403 #endif 404 405 #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 406 #define __sferror(p) (((p)->_flags & __SERR) != 0) 407 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 408 #define __sfileno(p) ((p)->_file) 409 410 extern int __isthreaded; 411 412 #define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p)) 413 #define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p)) 414 #define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p)) 415 416 #if __POSIX_VISIBLE 417 #define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p)) 418 #endif 419 420 #define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp)) 421 422 #if __BSD_VISIBLE 423 /* 424 * The macro implementations of putc and putc_unlocked are not 425 * fully POSIX compliant; they do not set errno on failure 426 */ 427 #define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp)) 428 #endif /* __BSD_VISIBLE */ 429 430 #ifndef lint 431 #if __POSIX_VISIBLE >= 199506 432 #define getc_unlocked(fp) __sgetc(fp) 433 /* 434 * The macro implementations of putc and putc_unlocked are not 435 * fully POSIX compliant; they do not set errno on failure 436 */ 437 #if __BSD_VISIBLE 438 #define putc_unlocked(x, fp) __sputc(x, fp) 439 #endif /* __BSD_VISIBLE */ 440 #endif /* __POSIX_VISIBLE >= 199506 */ 441 #endif /* lint */ 442 443 #define getchar() getc(stdin) 444 #define putchar(x) putc(x, stdout) 445 #define getchar_unlocked() getc_unlocked(stdin) 446 #define putchar_unlocked(c) putc_unlocked(c, stdout) 447 448 #ifdef _GNU_SOURCE 449 /* 450 * glibc defines dprintf(int, const char*, ...), which is poorly named 451 * and likely to conflict with locally defined debugging printfs 452 * fdprintf is a better name, and some programs that use fdprintf use a 453 * #define fdprintf dprintf for compatibility 454 */ 455 __BEGIN_DECLS 456 int fdprintf(int, const char*, ...); 457 int vfdprintf(int, const char*, __va_list); 458 __END_DECLS 459 #endif /* _GNU_SOURCE */ 460 461 #endif /* _STDIO_H_ */ 462
