stdio.h revision 1.1.1.2
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 */ 38 39 #ifndef _STDIO_H_ 40 #define _STDIO_H_ 41 42 #if !defined(_ANSI_SOURCE) && !defined(__STRICT_ANSI__) 43 #include <sys/types.h> 44 #endif 45 46 #include <sys/cdefs.h> 47 48 #include <machine/ansi.h> 49 #ifdef _BSD_SIZE_T_ 50 typedef _BSD_SIZE_T_ size_t; 51 #undef _BSD_SIZE_T_ 52 #endif 53 54 #ifndef NULL 55 #define NULL 0 56 #endif 57 58 /* 59 * This is fairly grotesque, but pure ANSI code must not inspect the 60 * innards of an fpos_t anyway. The library internally uses off_t, 61 * which we assume is exactly as big as eight chars. (When we switch 62 * to gcc 2.4 we will use __attribute__ here.) 63 * 64 * WARNING: the alignment constraints on an off_t and the struct below 65 * differ on (e.g.) the SPARC. Hence, the placement of an fpos_t object 66 * in a structure will change if fpos_t's are not aligned on 8-byte 67 * boundaries. THIS IS A CROCK, but for now there is no way around it. 68 */ 69 #if !defined(_ANSI_SOURCE) && !defined(__STRICT_ANSI__) 70 typedef off_t fpos_t; 71 #else 72 typedef struct __sfpos { 73 char _pos[8]; 74 } fpos_t; 75 #endif 76 77 #define _FSTDIO /* Define for new stdio with functions. */ 78 79 /* 80 * NB: to fit things in six character monocase externals, the stdio 81 * code uses the prefix `__s' for stdio objects, typically followed 82 * by a three-character attempt at a mnemonic. 83 */ 84 85 /* stdio buffers */ 86 struct __sbuf { 87 unsigned char *_base; 88 int _size; 89 }; 90 91 /* 92 * stdio state variables. 93 * 94 * The following always hold: 95 * 96 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 97 * _lbfsize is -_bf._size, else _lbfsize is 0 98 * if _flags&__SRD, _w is 0 99 * if _flags&__SWR, _r is 0 100 * 101 * This ensures that the getc and putc macros (or inline functions) never 102 * try to write or read from a file that is in `read' or `write' mode. 103 * (Moreover, they can, and do, automatically switch from read mode to 104 * write mode, and back, on "r+" and "w+" files.) 105 * 106 * _lbfsize is used only to make the inline line-buffered output stream 107 * code as compact as possible. 108 * 109 * _ub, _up, and _ur are used when ungetc() pushes back more characters 110 * than fit in the current _bf, or when ungetc() pushes back a character 111 * that does not match the previous one in _bf. When this happens, 112 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 113 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 114 * 115 * NB: see WARNING above before changing the layout of this structure! 116 */ 117 typedef struct __sFILE { 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 */ 125 126 /* operations */ 127 void *_cookie; /* cookie passed to io functions */ 128 int (*_close) __P((void *)); 129 int (*_read) __P((void *, char *, int)); 130 fpos_t (*_seek) __P((void *, fpos_t, int)); 131 int (*_write) __P((void *, const char *, int)); 132 133 /* 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 */ 137 138 /* 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 */ 141 142 /* separate buffer for fgetln() when line crosses buffer boundary */ 143 struct __sbuf _lb; /* buffer for fgetln() */ 144 145 /* 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 (see WARNING) */ 148 } FILE; 149 150 __BEGIN_DECLS 151 extern FILE __sF[]; 152 __END_DECLS 153 154 #define __SLBF 0x0001 /* line buffered */ 155 #define __SNBF 0x0002 /* unbuffered */ 156 #define __SRD 0x0004 /* OK to read */ 157 #define __SWR 0x0008 /* OK to write */ 158 /* RD and WR are never simultaneously asserted */ 159 #define __SRW 0x0010 /* open for reading & writing */ 160 #define __SEOF 0x0020 /* found EOF */ 161 #define __SERR 0x0040 /* found error */ 162 #define __SMBF 0x0080 /* _buf is from malloc */ 163 #define __SAPP 0x0100 /* fdopen()ed in append mode */ 164 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 165 #define __SOPT 0x0400 /* do fseek() optimisation */ 166 #define __SNPT 0x0800 /* do not do fseek() optimisation */ 167 #define __SOFF 0x1000 /* set iff _offset is in fact correct */ 168 #define __SMOD 0x2000 /* true => fgetln modified _p text */ 169 170 /* 171 * The following three definitions are for ANSI C, which took them 172 * from System V, which brilliantly took internal interface macros and 173 * made them official arguments to setvbuf(), without renaming them. 174 * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 175 * 176 * Although numbered as their counterparts above, the implementation 177 * does not rely on this. 178 */ 179 #define _IOFBF 0 /* setvbuf should set fully buffered */ 180 #define _IOLBF 1 /* setvbuf should set line buffered */ 181 #define _IONBF 2 /* setvbuf should set unbuffered */ 182 183 #define BUFSIZ 1024 /* size of buffer used by setbuf */ 184 #define EOF (-1) 185 186 /* 187 * FOPEN_MAX is a minimum maximum, and is the number of streams that 188 * stdio can provide without attempting to allocate further resources 189 * (which could fail). Do not use this for anything. 190 */ 191 /* must be == _POSIX_STREAM_MAX <limits.h> */ 192 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 193 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 194 195 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 196 #ifndef _ANSI_SOURCE 197 #define P_tmpdir "/var/tmp/" 198 #endif 199 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 200 #define TMP_MAX 308915776 201 202 #ifndef SEEK_SET 203 #define SEEK_SET 0 /* set file offset to offset */ 204 #endif 205 #ifndef SEEK_CUR 206 #define SEEK_CUR 1 /* set file offset to current plus offset */ 207 #endif 208 #ifndef SEEK_END 209 #define SEEK_END 2 /* set file offset to EOF plus offset */ 210 #endif 211 212 #define stdin (&__sF[0]) 213 #define stdout (&__sF[1]) 214 #define stderr (&__sF[2]) 215 216 /* 217 * Functions defined in ANSI C standard. 218 */ 219 __BEGIN_DECLS 220 void clearerr __P((FILE *)); 221 int fclose __P((FILE *)); 222 int feof __P((FILE *)); 223 int ferror __P((FILE *)); 224 int fflush __P((FILE *)); 225 int fgetc __P((FILE *)); 226 int fgetpos __P((FILE *, fpos_t *)); 227 char *fgets __P((char *, size_t, FILE *)); 228 FILE *fopen __P((const char *, const char *)); 229 int fprintf __P((FILE *, const char *, ...)); 230 int fputc __P((int, FILE *)); 231 int fputs __P((const char *, FILE *)); 232 size_t fread __P((void *, size_t, size_t, FILE *)); 233 FILE *freopen __P((const char *, const char *, FILE *)); 234 int fscanf __P((FILE *, const char *, ...)); 235 int fseek __P((FILE *, long, int)); 236 int fsetpos __P((FILE *, const fpos_t *)); 237 long ftell __P((FILE *)); 238 size_t fwrite __P((const void *, size_t, size_t, FILE *)); 239 int getc __P((FILE *)); 240 int getchar __P((void)); 241 char *gets __P((char *)); 242 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 243 extern int sys_nerr; /* perror(3) external variables */ 244 extern __const char *__const sys_errlist[]; 245 #endif 246 void perror __P((const char *)); 247 int printf __P((const char *, ...)); 248 int putc __P((int, FILE *)); 249 int putchar __P((int)); 250 int puts __P((const char *)); 251 int remove __P((const char *)); 252 int rename __P((const char *, const char *)); 253 void rewind __P((FILE *)); 254 int scanf __P((const char *, ...)); 255 void setbuf __P((FILE *, char *)); 256 int setvbuf __P((FILE *, char *, int, size_t)); 257 int sprintf __P((char *, const char *, ...)); 258 int sscanf __P((const char *, const char *, ...)); 259 FILE *tmpfile __P((void)); 260 char *tmpnam __P((char *)); 261 int ungetc __P((int, FILE *)); 262 int vfprintf __P((FILE *, const char *, _BSD_VA_LIST_)); 263 int vprintf __P((const char *, _BSD_VA_LIST_)); 264 int vsprintf __P((char *, const char *, _BSD_VA_LIST_)); 265 __END_DECLS 266 267 /* 268 * Functions defined in POSIX 1003.1. 269 */ 270 #ifndef _ANSI_SOURCE 271 #define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */ 272 #define L_ctermid 1024 /* size for ctermid(); PATH_MAX */ 273 274 __BEGIN_DECLS 275 char *ctermid __P((char *)); 276 FILE *fdopen __P((int, const char *)); 277 int fileno __P((FILE *)); 278 __END_DECLS 279 #endif /* not ANSI */ 280 281 /* 282 * Routines that are purely local. 283 */ 284 #if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 285 __BEGIN_DECLS 286 char *fgetln __P((FILE *, size_t *)); 287 int fpurge __P((FILE *)); 288 int getw __P((FILE *)); 289 int pclose __P((FILE *)); 290 FILE *popen __P((const char *, const char *)); 291 int putw __P((int, FILE *)); 292 void setbuffer __P((FILE *, char *, int)); 293 int setlinebuf __P((FILE *)); 294 char *tempnam __P((const char *, const char *)); 295 int snprintf __P((char *, size_t, const char *, ...)); 296 int vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_)); 297 int vscanf __P((const char *, _BSD_VA_LIST_)); 298 int vsscanf __P((const char *, const char *, _BSD_VA_LIST_)); 299 FILE *zopen __P((const char *, const char *, int)); 300 __END_DECLS 301 302 /* 303 * This is a #define because the function is used internally and 304 * (unlike vfscanf) the name __svfscanf is guaranteed not to collide 305 * with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined. 306 */ 307 #define vfscanf __svfscanf 308 309 /* 310 * Stdio function-access interface. 311 */ 312 __BEGIN_DECLS 313 FILE *funopen __P((const void *, 314 int (*)(void *, char *, int), 315 int (*)(void *, const char *, int), 316 fpos_t (*)(void *, fpos_t, int), 317 int (*)(void *))); 318 __END_DECLS 319 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 320 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 321 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 322 323 /* 324 * Functions internal to the implementation. 325 */ 326 __BEGIN_DECLS 327 int __srget __P((FILE *)); 328 int __svfscanf __P((FILE *, const char *, _BSD_VA_LIST_)); 329 int __swbuf __P((int, FILE *)); 330 __END_DECLS 331 332 /* 333 * The __sfoo macros are here so that we can 334 * define function versions in the C library. 335 */ 336 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 337 #if defined(__GNUC__) && defined(__STDC__) 338 static __inline int __sputc(int _c, FILE *_p) { 339 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 340 return (*_p->_p++ = _c); 341 else 342 return (__swbuf(_c, _p)); 343 } 344 #else 345 /* 346 * This has been tuned to generate reasonable code on the vax using pcc. 347 */ 348 #define __sputc(c, p) \ 349 (--(p)->_w < 0 ? \ 350 (p)->_w >= (p)->_lbfsize ? \ 351 (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 352 (int)*(p)->_p++ : \ 353 __swbuf('\n', p) : \ 354 __swbuf((int)(c), p) : \ 355 (*(p)->_p = (c), (int)*(p)->_p++)) 356 #endif 357 358 #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 359 #define __sferror(p) (((p)->_flags & __SERR) != 0) 360 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 361 #define __sfileno(p) ((p)->_file) 362 363 #define feof(p) __sfeof(p) 364 #define ferror(p) __sferror(p) 365 #define clearerr(p) __sclearerr(p) 366 367 #ifndef _ANSI_SOURCE 368 #define fileno(p) __sfileno(p) 369 #endif 370 371 #ifndef lint 372 #define getc(fp) __sgetc(fp) 373 #define putc(x, fp) __sputc(x, fp) 374 #endif /* lint */ 375 376 #define getchar() getc(stdin) 377 #define putchar(x) putc(x, stdout) 378 #endif /* _STDIO_H_ */ 379
Indexes created Thu Oct 02 10:09:58 GMT 2025