stdio.h revision 1.1
1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * 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 5.17 (Berkeley) 6/3/91 37 */ 38 39 #ifndef _STDIO_H_ 40 #define _STDIO_H_ 41 42 #include <sys/cdefs.h> 43 44 #include <machine/ansi.h> 45 #ifdef _SIZE_T_ 46 typedef _SIZE_T_ size_t; 47 #undef _SIZE_T_ 48 #endif 49 50 #ifndef NULL 51 #define NULL 0 52 #endif 53 54 typedef long fpos_t; /* Must match off_t <sys/types.h> */ 55 56 #define _FSTDIO /* Define for new stdio with functions. */ 57 58 /* 59 * NB: to fit things in six character monocase externals, the stdio 60 * code uses the prefix `__s' for stdio objects, typically followed 61 * by a three-character attempt at a mnemonic. 62 */ 63 64 /* stdio buffers */ 65 struct __sbuf { 66 unsigned char *_base; 67 int _size; 68 }; 69 70 /* 71 * stdio state variables. 72 * 73 * The following always hold: 74 * 75 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 76 * _lbfsize is -_bf._size, else _lbfsize is 0 77 * if _flags&__SRD, _w is 0 78 * if _flags&__SWR, _r is 0 79 * 80 * This ensures that the getc and putc macros (or inline functions) never 81 * try to write or read from a file that is in `read' or `write' mode. 82 * (Moreover, they can, and do, automatically switch from read mode to 83 * write mode, and back, on "r+" and "w+" files.) 84 * 85 * _lbfsize is used only to make the inline line-buffered output stream 86 * code as compact as possible. 87 * 88 * _ub, _up, and _ur are used when ungetc() pushes back more characters 89 * than fit in the current _bf, or when ungetc() pushes back a character 90 * that does not match the previous one in _bf. When this happens, 91 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 92 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 93 */ 94 typedef struct __sFILE { 95 unsigned char *_p; /* current position in (some) buffer */ 96 int _r; /* read space left for getc() */ 97 int _w; /* write space left for putc() */ 98 short _flags; /* flags, below; this FILE is free if 0 */ 99 short _file; /* fileno, if Unix descriptor, else -1 */ 100 struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ 101 int _lbfsize; /* 0 or -_bf._size, for inline putc */ 102 103 /* operations */ 104 void *_cookie; /* cookie passed to io functions */ 105 int (*_close) __P((void *)); 106 int (*_read) __P((void *, char *, int)); 107 fpos_t (*_seek) __P((void *, fpos_t, int)); 108 int (*_write) __P((void *, const char *, int)); 109 110 /* separate buffer for long sequences of ungetc() */ 111 struct __sbuf _ub; /* ungetc buffer */ 112 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 113 int _ur; /* saved _r when _r is counting ungetc data */ 114 115 /* tricks to meet minimum requirements even when malloc() fails */ 116 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ 117 unsigned char _nbuf[1]; /* guarantee a getc() buffer */ 118 119 /* separate buffer for fgetline() when line crosses buffer boundary */ 120 struct __sbuf _lb; /* buffer for fgetline() */ 121 122 /* Unix stdio files get aligned to block boundaries on fseek() */ 123 int _blksize; /* stat.st_blksize (may be != _bf._size) */ 124 int _offset; /* current lseek offset */ 125 } FILE; 126 127 __BEGIN_DECLS 128 extern FILE __sF[]; 129 __END_DECLS 130 131 #define __SLBF 0x0001 /* line buffered */ 132 #define __SNBF 0x0002 /* unbuffered */ 133 #define __SRD 0x0004 /* OK to read */ 134 #define __SWR 0x0008 /* OK to write */ 135 /* RD and WR are never simultaneously asserted */ 136 #define __SRW 0x0010 /* open for reading & writing */ 137 #define __SEOF 0x0020 /* found EOF */ 138 #define __SERR 0x0040 /* found error */ 139 #define __SMBF 0x0080 /* _buf is from malloc */ 140 #define __SAPP 0x0100 /* fdopen()ed in append mode */ 141 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 142 #define __SOPT 0x0400 /* do fseek() optimisation */ 143 #define __SNPT 0x0800 /* do not do fseek() optimisation */ 144 #define __SOFF 0x1000 /* set iff _offset is in fact correct */ 145 #define __SMOD 0x2000 /* true => fgetline modified _p text */ 146 147 /* 148 * The following three definitions are for ANSI C, which took them 149 * from System V, which brilliantly took internal interface macros and 150 * made them official arguments to setvbuf(), without renaming them. 151 * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 152 * 153 * Although numbered as their counterparts above, the implementation 154 * does not rely on this. 155 */ 156 #define _IOFBF 0 /* setvbuf should set fully buffered */ 157 #define _IOLBF 1 /* setvbuf should set line buffered */ 158 #define _IONBF 2 /* setvbuf should set unbuffered */ 159 160 #define BUFSIZ 1024 /* size of buffer used by setbuf */ 161 #define EOF (-1) 162 163 /* 164 * FOPEN_MAX is a minimum maximum, and should be the number of descriptors 165 * that the kernel can provide without allocation of a resource that can 166 * fail without the process sleeping. Do not use this for anything. 167 */ 168 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 169 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 170 171 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 172 #ifndef _ANSI_SOURCE 173 #define P_tmpdir "/var/tmp/" 174 #endif 175 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 176 #define TMP_MAX 308915776 177 178 #ifndef SEEK_SET 179 #define SEEK_SET 0 /* set file offset to offset */ 180 #endif 181 #ifndef SEEK_CUR 182 #define SEEK_CUR 1 /* set file offset to current plus offset */ 183 #endif 184 #ifndef SEEK_END 185 #define SEEK_END 2 /* set file offset to EOF plus offset */ 186 #endif 187 188 #define stdin (&__sF[0]) 189 #define stdout (&__sF[1]) 190 #define stderr (&__sF[2]) 191 192 /* 193 * Functions defined in ANSI C standard. 194 */ 195 __BEGIN_DECLS 196 void clearerr __P((FILE *)); 197 int fclose __P((FILE *)); 198 int feof __P((FILE *)); 199 int ferror __P((FILE *)); 200 int fflush __P((FILE *)); 201 int fgetc __P((FILE *)); 202 int fgetpos __P((FILE *, fpos_t *)); 203 char *fgets __P((char *, size_t, FILE *)); 204 FILE *fopen __P((const char *, const char *)); 205 int fprintf __P((FILE *, const char *, ...)); 206 int fputc __P((int, FILE *)); 207 int fputs __P((const char *, FILE *)); 208 int fread __P((void *, size_t, size_t, FILE *)); 209 FILE *freopen __P((const char *, const char *, FILE *)); 210 int fscanf __P((FILE *, const char *, ...)); 211 int fseek __P((FILE *, long, int)); 212 int fsetpos __P((FILE *, const fpos_t *)); 213 long ftell __P((const FILE *)); 214 int fwrite __P((const void *, size_t, size_t, FILE *)); 215 int getc __P((FILE *)); 216 int getchar __P((void)); 217 char *gets __P((char *)); 218 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 219 extern int sys_nerr; /* perror(3) external variables */ 220 extern char *sys_errlist[]; 221 #endif 222 void perror __P((const char *)); 223 int printf __P((const char *, ...)); 224 int putc __P((int, FILE *)); 225 int putchar __P((int)); 226 int puts __P((const char *)); 227 int remove __P((const char *)); 228 int rename __P((const char *, const char *)); 229 void rewind __P((FILE *)); 230 int scanf __P((const char *, ...)); 231 void setbuf __P((FILE *, char *)); 232 int setvbuf __P((FILE *, char *, int, size_t)); 233 int sprintf __P((char *, const char *, ...)); 234 int sscanf __P((char *, const char *, ...)); 235 FILE *tmpfile __P((void)); 236 char *tmpnam __P((char *)); 237 int ungetc __P((int, FILE *)); 238 int vfprintf __P((FILE *, const char *, _VA_LIST_)); 239 int vprintf __P((const char *, _VA_LIST_)); 240 int vsprintf __P((char *, const char *, _VA_LIST_)); 241 __END_DECLS 242 243 /* 244 * Functions defined in POSIX 1003.1. 245 */ 246 #ifndef _ANSI_SOURCE 247 #define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */ 248 #define L_ctermid 1024 /* size for ctermid(); PATH_MAX */ 249 250 __BEGIN_DECLS 251 char *ctermid __P((char *)); 252 FILE *fdopen __P((int, const char *)); 253 int fileno __P((FILE *)); 254 __END_DECLS 255 #endif /* not ANSI */ 256 257 /* 258 * Routines that are purely local. 259 */ 260 #if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 261 __BEGIN_DECLS 262 char *fgetline __P((FILE *, size_t *)); 263 int fpurge __P((FILE *)); 264 int getw __P((FILE *)); 265 int pclose __P((FILE *)); 266 FILE *popen __P((const char *, const char *)); 267 int putw __P((int, FILE *)); 268 void setbuffer __P((FILE *, char *, int)); 269 int setlinebuf __P((FILE *)); 270 char *tempnam __P((const char *, const char *)); 271 int snprintf __P((char *, size_t, const char *, ...)); 272 int vsnprintf __P((char *, size_t, const char *, _VA_LIST_)); 273 int vscanf __P((const char *, _VA_LIST_)); 274 int vsscanf __P((const char *, const char *, _VA_LIST_)); 275 __END_DECLS 276 277 /* 278 * This is a #define because the function is used internally and 279 * (unlike vfscanf) the name __svfscanf is guaranteed not to collide 280 * with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined. 281 */ 282 #define vfscanf __svfscanf 283 284 /* 285 * Stdio function-access interface. 286 */ 287 __BEGIN_DECLS 288 FILE *funopen __P((const void *, 289 int (*)(void *, char *, int), 290 int (*)(void *, const char *, int), 291 fpos_t (*)(void *, fpos_t, int), 292 int (*)(void *))); 293 __END_DECLS 294 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 295 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 296 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 297 298 /* 299 * Functions internal to the implementation. 300 */ 301 __BEGIN_DECLS 302 int __srget __P((FILE *)); 303 int __svfscanf __P((FILE *, const char *, _VA_LIST_)); 304 int __swbuf __P((int, FILE *)); 305 __END_DECLS 306 307 /* 308 * The __sfoo macros are here so that we can 309 * define function versions in the C library. 310 */ 311 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 312 #if defined(__GNUC__) && defined(__STDC__) 313 static inline int __sputc(int _c, FILE *_p) { 314 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 315 return (*_p->_p++ = _c); 316 else 317 return (__swbuf(_c, _p)); 318 } 319 #else 320 /* 321 * This has been tuned to generate reasonable code on the vax using pcc. 322 */ 323 #define __sputc(c, p) \ 324 (--(p)->_w < 0 ? \ 325 (p)->_w >= (p)->_lbfsize ? \ 326 (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 327 (int)*(p)->_p++ : \ 328 __swbuf('\n', p) : \ 329 __swbuf((int)(c), p) : \ 330 (*(p)->_p = (c), (int)*(p)->_p++)) 331 #endif 332 333 #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 334 #define __sferror(p) (((p)->_flags & __SERR) != 0) 335 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 336 #define __sfileno(p) ((p)->_file) 337 338 #define feof(p) __sfeof(p) 339 #define ferror(p) __sferror(p) 340 #define clearerr(p) __sclearerr(p) 341 342 #ifndef _ANSI_SOURCE 343 #define fileno(p) __sfileno(p) 344 #endif 345 346 #ifndef lint 347 #define getc(fp) __sgetc(fp) 348 #define putc(x, fp) __sputc(x, fp) 349 #endif /* lint */ 350 351 #define getchar() getc(stdin) 352 #define putchar(x) putc(x, stdout) 353 #endif /* _STDIO_H_ */ 354
Indexes created Sun Sep 21 19:09:51 GMT 2025