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 * %sccs.include.redist.c% 9 * 10 * @(#)stdio.h 5.11 (Berkeley) 02/22/91 11 */ 12 13 #ifndef _STDIO_H_ 14 #define _STDIO_H_ 15 16 #include <sys/cdefs.h> 17 18 #include <machine/types.h> 19 #ifdef _SIZE_T_ 20 typedef _SIZE_T_ size_t; 21 #undef _SIZE_T_ 22 #endif 23 24 #ifndef NULL 25 #define NULL 0 26 #endif 27 28 typedef long fpos_t; /* Must match off_t <sys/types.h> */ 29 30 #define _FSTDIO /* Define for new stdio with functions. */ 31 32 /* 33 * NB: to fit things in six character monocase externals, the stdio 34 * code uses the prefix `__s' for stdio objects, typically followed 35 * by a three-character attempt at a mnemonic. 36 */ 37 38 /* stdio buffers */ 39 struct __sbuf { 40 unsigned char *_base; 41 int _size; 42 }; 43 44 /* 45 * stdio state variables. 46 * 47 * The following always hold: 48 * 49 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 50 * _lbfsize is -_bf._size, else _lbfsize is 0 51 * if _flags&__SRD, _w is 0 52 * if _flags&__SWR, _r is 0 53 * 54 * This ensures that the getc and putc macros (or inline functions) never 55 * try to write or read from a file that is in `read' or `write' mode. 56 * (Moreover, they can, and do, automatically switch from read mode to 57 * write mode, and back, on "r+" and "w+" files.) 58 * 59 * _lbfsize is used only to make the inline line-buffered output stream 60 * code as compact as possible. 61 * 62 * _ub, _up, and _ur are used when ungetc() pushes back more characters 63 * than fit in the current _bf, or when ungetc() pushes back a character 64 * that does not match the previous one in _bf. When this happens, 65 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 66 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 67 */ 68 typedef struct __sFILE { 69 unsigned char *_p; /* current position in (some) buffer */ 70 int _r; /* read space left for getc() */ 71 int _w; /* write space left for putc() */ 72 short _flags; /* flags, below; this FILE is free if 0 */ 73 short _file; /* fileno, if Unix descriptor, else -1 */ 74 struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ 75 int _lbfsize; /* 0 or -_bf._size, for inline putc */ 76 77 /* operations */ 78 void *_cookie; /* cookie passed to io functions */ 79 int (*_close) __P((void *)); 80 int (*_read) __P((void *, char *, int)); 81 fpos_t (*_seek) __P((void *, fpos_t, int)); 82 int (*_write) __P((void *, const char *, int)); 83 84 /* separate buffer for long sequences of ungetc() */ 85 struct __sbuf _ub; /* ungetc buffer */ 86 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 87 int _ur; /* saved _r when _r is counting ungetc data */ 88 89 /* tricks to meet minimum requirements even when malloc() fails */ 90 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ 91 unsigned char _nbuf[1]; /* guarantee a getc() buffer */ 92 93 /* separate buffer for fgetline() when line crosses buffer boundary */ 94 struct __sbuf _lb; /* buffer for fgetline() */ 95 96 /* Unix stdio files get aligned to block boundaries on fseek() */ 97 int _blksize; /* stat.st_blksize (may be != _bf._size) */ 98 int _offset; /* current lseek offset */ 99 } FILE; 100 101 extern FILE __sF[]; 102 103 #define __SLBF 0x0001 /* line buffered */ 104 #define __SNBF 0x0002 /* unbuffered */ 105 #define __SRD 0x0004 /* OK to read */ 106 #define __SWR 0x0008 /* OK to write */ 107 /* RD and WR are never simultaneously asserted */ 108 #define __SRW 0x0010 /* open for reading & writing */ 109 #define __SEOF 0x0020 /* found EOF */ 110 #define __SERR 0x0040 /* found error */ 111 #define __SMBF 0x0080 /* _buf is from malloc */ 112 #define __SAPP 0x0100 /* fdopen()ed in append mode */ 113 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 114 #define __SOPT 0x0400 /* do fseek() optimisation */ 115 #define __SNPT 0x0800 /* do not do fseek() optimisation */ 116 #define __SOFF 0x1000 /* set iff _offset is in fact correct */ 117 #define __SMOD 0x2000 /* true => fgetline modified _p text */ 118 119 /* 120 * The following three definitions are for ANSI C, which took them 121 * from System V, which brilliantly took internal interface macros and 122 * made them official arguments to setvbuf(), without renaming them. 123 * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 124 * 125 * Although numbered as their counterparts above, the implementation 126 * does not rely on this. 127 */ 128 #define _IOFBF 0 /* setvbuf should set fully buffered */ 129 #define _IOLBF 1 /* setvbuf should set line buffered */ 130 #define _IONBF 2 /* setvbuf should set unbuffered */ 131 132 #define BUFSIZ 1024 /* size of buffer used by setbuf */ 133 #define EOF (-1) 134 135 /* 136 * FOPEN_MAX is a minimum maximum, and should be the number of descriptors 137 * that the kernel can provide without allocation of a resource that can 138 * fail without the process sleeping. Do not use this for anything. 139 */ 140 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 141 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 142 143 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 144 #ifndef _ANSI_SOURCE 145 #define P_tmpdir "/usr/tmp/" 146 #endif 147 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 148 #define TMP_MAX 308915776 149 150 #ifndef SEEK_SET 151 #define SEEK_SET 0 /* set file offset to offset */ 152 #endif 153 #ifndef SEEK_CUR 154 #define SEEK_CUR 1 /* set file offset to current plus offset */ 155 #endif 156 #ifndef SEEK_END 157 #define SEEK_END 2 /* set file offset to EOF plus offset */ 158 #endif 159 160 #define stdin (&__sF[0]) 161 #define stdout (&__sF[1]) 162 #define stderr (&__sF[2]) 163 164 /* 165 * Functions defined in ANSI C standard. 166 */ 167 __BEGIN_DECLS 168 void clearerr __P((FILE *)); 169 int fclose __P((FILE *)); 170 int feof __P((FILE *)); 171 int ferror __P((FILE *)); 172 int fflush __P((FILE *)); 173 int fgetc __P((FILE *)); 174 int fgetpos __P((FILE *, fpos_t *)); 175 char *fgets __P((char *, size_t, FILE *)); 176 FILE *fopen __P((const char *, const char *)); 177 int fprintf __P((FILE *, const char *, ...)); 178 int fputc __P((int, FILE *)); 179 int fputs __P((const char *, FILE *)); 180 int fread __P((void *, size_t, size_t, FILE *)); 181 FILE *freopen __P((const char *, const char *, FILE *)); 182 int fscanf __P((FILE *, const char *, ...)); 183 int fseek __P((FILE *, long, int)); 184 int fsetpos __P((FILE *, const fpos_t *)); 185 long ftell __P((const FILE *)); 186 int fwrite __P((const void *, size_t, size_t, FILE *)); 187 int getc __P((FILE *)); 188 int getchar __P((void)); 189 char *gets __P((char *)); 190 void perror __P((const char *)); 191 int printf __P((const char *, ...)); 192 int putc __P((int, FILE *)); 193 int putchar __P((int)); 194 int puts __P((const char *)); 195 int remove __P((const char *)); 196 int rename __P((const char *, const char *)); 197 void rewind __P((FILE *)); 198 int scanf __P((const char *, ...)); 199 void setbuf __P((FILE *, char *)); 200 int setvbuf __P((FILE *, char *, int, size_t)); 201 int sprintf __P((char *, const char *, ...)); 202 int sscanf __P((char *, const char *, ...)); 203 FILE *tmpfile __P((void)); 204 char *tmpnam __P((char *)); 205 int ungetc __P((int, FILE *)); 206 int vfprintf __P((FILE *, const char *, _VA_LIST_)); 207 int vprintf __P((const char *, _VA_LIST_)); 208 int vsprintf __P((char *, const char *, _VA_LIST_)); 209 __END_DECLS 210 211 /* 212 * Functions defined in POSIX 1003.1. 213 */ 214 #ifndef _ANSI_SOURCE 215 #define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */ 216 #define L_ctermid 1024 /* size for ctermid(); PATH_MAX */ 217 218 __BEGIN_DECLS 219 char *ctermid __P((char *)); 220 FILE *fdopen __P((int, const char *)); 221 int fileno __P((FILE *)); 222 __END_DECLS 223 #endif /* not ANSI */ 224 225 /* 226 * Routines that are purely local. 227 */ 228 #if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 229 __BEGIN_DECLS 230 char *fgetline __P((FILE *, size_t *)); 231 int fpurge __P((FILE *)); 232 int getw __P((FILE *)); 233 int pclose __P((FILE *)); 234 FILE *popen __P((const char *, const char *)); 235 int putw __P((int, FILE *)); 236 void setbuffer __P((FILE *, char *, int)); 237 int setlinebuf __P((FILE *)); 238 int snprintf __P((char *, size_t, const char *, ...)); 239 int vsnprintf __P((char *, size_t, const char *, _VA_LIST_)); 240 __END_DECLS 241 242 /* 243 * Stdio function-access interface. 244 */ 245 __BEGIN_DECLS 246 FILE *funopen __P((const void *, 247 int (*)(void *, char *, int), 248 int (*)(void *, const char *, int), 249 fpos_t (*)(void *, fpos_t, int), 250 int (*)(void *))); 251 __END_DECLS 252 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 253 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 254 #endif /* neither ANSI nor POSIX */ 255 256 /* 257 * Functions internal to the implementation. 258 */ 259 int __srget __P((FILE *)); 260 int __swbuf __P((int, FILE *)); 261 262 /* 263 * The __sfoo macros are here so that we can 264 * define function versions in the C library. 265 */ 266 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 267 #ifdef __GNUC__ 268 static __inline int __sputc(int _c, FILE *_p) { 269 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 270 return (*_p->_p++ = _c); 271 else 272 return (__swbuf(_c, _p)); 273 } 274 #else 275 /* 276 * This has been tuned to generate reasonable code on the vax using pcc. 277 */ 278 #define __sputc(c, p) \ 279 (--(p)->_w < 0 ? \ 280 (p)->_w >= (p)->_lbfsize ? \ 281 (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 282 (int)*(p)->_p++ : \ 283 __swbuf('\n', p) : \ 284 __swbuf((int)(c), p) : \ 285 (*(p)->_p = (c), (int)*(p)->_p++)) 286 #endif 287 288 #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 289 #define __sferror(p) (((p)->_flags & __SERR) != 0) 290 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 291 #define __sfileno(p) ((p)->_file) 292 293 #define feof(p) __sfeof(p) 294 #define ferror(p) __sferror(p) 295 #define clearerr(p) __sclearerr(p) 296 297 #ifndef _ANSI_SOURCE 298 #define fileno(p) __sfileno(p) 299 #endif 300 301 #ifndef lint 302 #define getc(fp) __sgetc(fp) 303 #define putc(x, fp) __sputc(x, fp) 304 #endif /* lint */ 305 306 #define getchar() getc(stdin) 307 #define putchar(x) putc(x, stdout) 308 #endif /* _STDIO_H_ */ 309