00001 /* stdio.h stdc header 00002 Adapted by Stephane Carrez (stcarrez@nerim.fr) from FreeBSD stdio.h 00003 (Cleaned up and removed non-relevant operations) 00004 */ 00005 /*- 00006 * Copyright (c) 1990, 1993 00007 * The Regents of the University of California. All rights reserved. 00008 * 00009 * This code is derived from software contributed to Berkeley by 00010 * Chris Torek. 00011 * 00012 * Redistribution and use in source and binary forms, with or without 00013 * modification, are permitted provided that the following conditions 00014 * are met: 00015 * 1. Redistributions of source code must retain the above copyright 00016 * notice, this list of conditions and the following disclaimer. 00017 * 2. Redistributions in binary form must reproduce the above copyright 00018 * notice, this list of conditions and the following disclaimer in the 00019 * documentation and/or other materials provided with the distribution. 00020 * 3. All advertising materials mentioning features or use of this software 00021 * must display the following acknowledgement: 00022 * This product includes software developed by the University of 00023 * California, Berkeley and its contributors. 00024 * 4. Neither the name of the University nor the names of its contributors 00025 * may be used to endorse or promote products derived from this software 00026 * without specific prior written permission. 00027 * 00028 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00029 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00030 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00031 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00032 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00033 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00034 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00035 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00036 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00037 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00038 * SUCH DAMAGE. 00039 * 00040 * @(#)stdio.h 8.5 (Berkeley) 4/29/95 00041 * $FreeBSD: src/include/stdio.h,v 1.51 2003/01/13 08:41:47 tjr Exp $ 00042 */ 00043 00044 #ifndef _STDIO_H_ 00045 #define _STDIO_H_ 00046 00047 #include <sys/cdefs.h> 00048 #include <sys/_types.h> 00049 00050 typedef __off_t fpos_t; 00051 00052 #ifndef _SIZE_T_DECLARED 00053 typedef __size_t size_t; 00054 #define _SIZE_T_DECLARED 00055 #endif 00056 00057 #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 00058 #include <stdarg.h> 00059 typedef va_list __va_list; 00060 #endif 00061 00062 #ifndef NULL 00063 #define NULL 0 00064 #endif 00065 00066 #define _FSTDIO /* Define for new stdio with functions. */ 00067 00068 /* 00069 * NB: to fit things in six character monocase externals, the stdio 00070 * code uses the prefix `__s' for stdio objects, typically followed 00071 * by a three-character attempt at a mnemonic. 00072 */ 00073 00074 /* stdio buffers */ 00075 struct __sbuf { 00076 unsigned char *_base; 00077 int _size; 00078 }; 00079 00080 /* hold a buncha junk that would grow the ABI */ 00081 struct __sFILEX; 00082 struct __File_ops; 00083 00084 /* 00085 * stdio state variables. 00086 * 00087 * The following always hold: 00088 * 00089 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 00090 * _lbfsize is -_bf._size, else _lbfsize is 0 00091 * if _flags&__SRD, _w is 0 00092 * if _flags&__SWR, _r is 0 00093 * 00094 * This ensures that the getc and putc macros (or inline functions) never 00095 * try to write or read from a file that is in `read' or `write' mode. 00096 * (Moreover, they can, and do, automatically switch from read mode to 00097 * write mode, and back, on "r+" and "w+" files.) 00098 * 00099 * _lbfsize is used only to make the inline line-buffered output stream 00100 * code as compact as possible. 00101 * 00102 * _ub, _up, and _ur are used when ungetc() pushes back more characters 00103 * than fit in the current _bf, or when ungetc() pushes back a character 00104 * that does not match the previous one in _bf. When this happens, 00105 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 00106 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 00107 * 00108 * NB: see WARNING above before changing the layout of this structure! 00109 */ 00110 typedef struct __sFILE { 00111 unsigned char *_p; /* current position in (some) buffer */ 00112 int _r; /* read space left for getc() */ 00113 int _w; /* write space left for putc() */ 00114 short _flags; /* flags, below; this FILE is free if 0 */ 00115 short _file; /* fileno, if Unix descriptor, else -1 */ 00116 struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ 00117 int _lbfsize; /* 0 or -_bf._size, for inline putc */ 00118 const struct __File_ops* _ops; 00119 /* separate buffer for long sequences of ungetc() */ 00120 struct __sbuf _ub; /* ungetc buffer */ 00121 int _ur; /* saved _r when _r is counting ungetc data */ 00122 char* _up; 00123 } FILE; 00124 00125 __BEGIN_DECLS 00126 extern FILE *const __stdinp; 00127 extern FILE *const __stdoutp; 00128 extern FILE *const __stderrp; 00129 __END_DECLS 00130 00131 #define __SLBF 0x0001 /* line buffered */ 00132 #define __SNBF 0x0002 /* unbuffered */ 00133 #define __SRD 0x0004 /* OK to read */ 00134 #define __SWR 0x0008 /* OK to write */ 00135 /* RD and WR are never simultaneously asserted */ 00136 #define __SRW 0x0010 /* open for reading & writing */ 00137 #define __SEOF 0x0020 /* found EOF */ 00138 #define __SERR 0x0040 /* found error */ 00139 #define __SMBF 0x0080 /* _buf is from malloc */ 00140 #define __SAPP 0x0100 /* fdopen()ed in append mode */ 00141 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 00142 #define __SNPT 0x0800 /* do not do fseek() optimization */ 00143 #define __SALC 0x4000 /* allocate string space dynamically */ 00144 #define __SIGN 0x8000 /* ignore this file in _fwalk */ 00145 00146 /* 00147 * The following three definitions are for ANSI C, which took them 00148 * from System V, which brilliantly took internal interface macros and 00149 * made them official arguments to setvbuf(), without renaming them. 00150 * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 00151 * 00152 * Although numbered as their counterparts above, the implementation 00153 * does not rely on this. 00154 */ 00155 #define _IOFBF 0 /* setvbuf should set fully buffered */ 00156 #define _IOLBF 1 /* setvbuf should set line buffered */ 00157 #define _IONBF 2 /* setvbuf should set unbuffered */ 00158 00159 #define BUFSIZ 1024 /* size of buffer used by setbuf */ 00160 #define EOF (-1) 00161 00162 /* 00163 * FOPEN_MAX is a minimum maximum, and is the number of streams that 00164 * stdio can provide without attempting to allocate further resources 00165 * (which could fail). Do not use this for anything. 00166 */ 00167 /* must be == _POSIX_STREAM_MAX <limits.h> */ 00168 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 00169 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 00170 00171 #ifndef SEEK_SET 00172 #define SEEK_SET 0 /* set file offset to offset */ 00173 #endif 00174 #ifndef SEEK_CUR 00175 #define SEEK_CUR 1 /* set file offset to current plus offset */ 00176 #endif 00177 #ifndef SEEK_END 00178 #define SEEK_END 2 /* set file offset to EOF plus offset */ 00179 #endif 00180 00181 #define stdin __stdinp 00182 #define stdout __stdoutp 00183 #define stderr __stderrp 00184 00185 __BEGIN_DECLS 00186 /* 00187 * Functions defined in ANSI C standard. 00188 */ 00189 void clearerr(FILE *); 00190 int fclose(FILE *); 00191 int feof(FILE *); 00192 int ferror(FILE *); 00193 int fflush(FILE *); 00194 int fgetc(FILE *); 00195 char *fgets(char * __restrict, int, FILE * __restrict); 00196 int fprintf(FILE * __restrict, const char * __restrict, ...); 00197 int fputc(int, FILE *); 00198 int fputs(const char * __restrict, FILE * __restrict); 00199 size_t fread(void * __restrict, size_t, size_t, FILE * __restrict); 00200 int fscanf(FILE * __restrict, const char * __restrict, ...); 00201 size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict); 00202 int getc(FILE *); 00203 int getchar(void); 00204 char *gets(char *); 00205 int printf(const char * __restrict, ...); 00206 int putc(int, FILE *); 00207 int putchar(int); 00208 int puts(const char *); 00209 int scanf(const char * __restrict, ...); 00210 void setbuf(FILE * __restrict, char * __restrict); 00211 int setvbuf(FILE * __restrict, char * __restrict, int, size_t); 00212 int sprintf(char * __restrict, const char * __restrict, ...); 00213 int sscanf(const char * __restrict, const char * __restrict, ...); 00214 int ungetc(int, FILE *); 00215 int vfprintf(FILE * __restrict, const char * __restrict, __va_list); 00216 int vprintf(const char * __restrict, __va_list); 00217 int vsprintf(char * __restrict, const char * __restrict, __va_list); 00218 00219 #if __ISO_C_VISIBLE >= 1999 00220 int snprintf(char * __restrict, size_t, const char * __restrict, 00221 ...) __printflike(3, 4); 00222 int vfscanf(FILE * __restrict, const char * __restrict, __va_list) 00223 __scanflike(2, 0); 00224 int vscanf(const char * __restrict, __va_list) __scanflike(1, 0); 00225 int vsnprintf(char * __restrict, size_t, const char * __restrict, 00226 __va_list) __printflike(3, 0); 00227 int vsscanf(const char * __restrict, const char * __restrict, __va_list) 00228 __scanflike(2, 0); 00229 #endif 00230 00231 00232 #if __POSIX_VISIBLE 00233 int fileno(FILE *); 00234 #endif /* __POSIX_VISIBLE */ 00235 00236 /* 00237 * Routines that are purely local. 00238 */ 00239 #if __BSD_VISIBLE 00240 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3 00241 #define __ATTR_FORMAT_ARG __attribute__((__format_arg__(2))) 00242 #else 00243 #define __ATTR_FORMAT_ARG 00244 #endif 00245 void setbuffer(FILE *, char *, int); 00246 int setlinebuf(FILE *); 00247 00248 /* 00249 * Stdio function-access interface. 00250 */ 00251 FILE *funopen(const void *, 00252 int (*)(void *, char *, int), 00253 int (*)(void *, const char *, int), 00254 fpos_t (*)(void *, fpos_t, int), 00255 int (*)(void *)); 00256 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 00257 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 00258 00259 #endif /* __BSD_VISIBLE */ 00260 00261 /* 00262 * Functions internal to the implementation. 00263 */ 00264 int __srget(FILE *); 00265 int __swbufc(char, FILE *); 00266 00267 /* 00268 * The __sfoo macros are here so that we can 00269 * define function versions in the C library. 00270 */ 00271 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 00272 #if defined(__GNUC__) && defined(__STDC__) 00273 extern int __sputc(int _c, FILE *_p); 00274 00275 extern __inline int __sputc(int _c, FILE *_p) { 00276 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 00277 return (*_p->_p++ = _c); 00278 else 00279 return (__swbufc(_c, _p)); 00280 } 00281 #else 00282 /* 00283 * This has been tuned to generate reasonable code on the vax using pcc. 00284 */ 00285 #define __sputc(c, p) \ 00286 (--(p)->_w < 0 ? \ 00287 (p)->_w >= (p)->_lbfsize ? \ 00288 (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 00289 (int)*(p)->_p++ : \ 00290 __swbuf('\n', p) : \ 00291 __swbuf((int)(c), p) : \ 00292 (*(p)->_p = (c), (int)*(p)->_p++)) 00293 #endif 00294 00295 #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 00296 #define __sferror(p) (((p)->_flags & __SERR) != 0) 00297 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 00298 #define __sfileno(p) ((p)->_file) 00299 00300 __END_DECLS 00301 #endif /* !_STDIO_H_ */