stdio.h revision 203964
11539Srgrimes/*- 21539Srgrimes * Copyright (c) 1990, 1993 31539Srgrimes * The Regents of the University of California. All rights reserved. 41539Srgrimes * 51539Srgrimes * This code is derived from software contributed to Berkeley by 61539Srgrimes * Chris Torek. 71539Srgrimes * 81539Srgrimes * Redistribution and use in source and binary forms, with or without 91539Srgrimes * modification, are permitted provided that the following conditions 101539Srgrimes * are met: 111539Srgrimes * 1. Redistributions of source code must retain the above copyright 121539Srgrimes * notice, this list of conditions and the following disclaimer. 131539Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141539Srgrimes * notice, this list of conditions and the following disclaimer in the 151539Srgrimes * documentation and/or other materials provided with the distribution. 16203964Simp * 3. Neither the name of the University nor the names of its contributors 171539Srgrimes * may be used to endorse or promote products derived from this software 181539Srgrimes * without specific prior written permission. 191539Srgrimes * 201539Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211539Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221539Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231539Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241539Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251539Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261539Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271539Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281539Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291539Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301539Srgrimes * SUCH DAMAGE. 311539Srgrimes * 3223655Speter * @(#)stdio.h 8.5 (Berkeley) 4/29/95 3350473Speter * $FreeBSD: head/include/stdio.h 203964 2010-02-16 19:39:50Z imp $ 341539Srgrimes */ 351539Srgrimes 361539Srgrimes#ifndef _STDIO_H_ 371539Srgrimes#define _STDIO_H_ 381539Srgrimes 391539Srgrimes#include <sys/cdefs.h> 40123257Smarcel#include <sys/_null.h> 41102227Smike#include <sys/_types.h> 421539Srgrimes 43104585Smiketypedef __off_t fpos_t; 44104585Smike 45102227Smike#ifndef _SIZE_T_DECLARED 46102227Smiketypedef __size_t size_t; 47102227Smike#define _SIZE_T_DECLARED 481539Srgrimes#endif 491539Srgrimes 50189136Sdas#if __BSD_VISIBLE || __POSIX_VISIBLE >= 200809 51189136Sdas#ifndef _OFF_T_DECLARED 52189136Sdas#define _OFF_T_DECLARED 53189136Sdastypedef __off_t off_t; 54189136Sdas#endif 55189136Sdas#ifndef _SSIZE_T_DECLARED 56189136Sdas#define _SSIZE_T_DECLARED 57189136Sdastypedef __ssize_t ssize_t; 58189136Sdas#endif 59189136Sdas#endif 60189136Sdas 61104585Smike#if __BSD_VISIBLE || __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 62104585Smike#ifndef _VA_LIST_DECLARED 63104585Smiketypedef __va_list va_list; 64104585Smike#define _VA_LIST_DECLARED 65104585Smike#endif 66104585Smike#endif 67104585Smike 681539Srgrimes#define _FSTDIO /* Define for new stdio with functions. */ 691539Srgrimes 70178778Sjhb/* 71178778Sjhb * NB: to fit things in six character monocase externals, the stdio 72178778Sjhb * code uses the prefix `__s' for stdio objects, typically followed 73178778Sjhb * by a three-character attempt at a mnemonic. 74178778Sjhb */ 751539Srgrimes 76178778Sjhb/* stdio buffers */ 77178778Sjhbstruct __sbuf { 78178778Sjhb unsigned char *_base; 79178778Sjhb int _size; 80178778Sjhb}; 81178778Sjhb 82178778Sjhb/* 83178778Sjhb * stdio state variables. 84178778Sjhb * 85178778Sjhb * The following always hold: 86178778Sjhb * 87178778Sjhb * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 88178778Sjhb * _lbfsize is -_bf._size, else _lbfsize is 0 89178778Sjhb * if _flags&__SRD, _w is 0 90178778Sjhb * if _flags&__SWR, _r is 0 91178778Sjhb * 92178778Sjhb * This ensures that the getc and putc macros (or inline functions) never 93178778Sjhb * try to write or read from a file that is in `read' or `write' mode. 94178778Sjhb * (Moreover, they can, and do, automatically switch from read mode to 95178778Sjhb * write mode, and back, on "r+" and "w+" files.) 96178778Sjhb * 97178778Sjhb * _lbfsize is used only to make the inline line-buffered output stream 98178778Sjhb * code as compact as possible. 99178778Sjhb * 100178778Sjhb * _ub, _up, and _ur are used when ungetc() pushes back more characters 101178778Sjhb * than fit in the current _bf, or when ungetc() pushes back a character 102178778Sjhb * that does not match the previous one in _bf. When this happens, 103178778Sjhb * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 104178778Sjhb * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 105178778Sjhb * 106178778Sjhb * Certain members of __sFILE are accessed directly via macros or 107178778Sjhb * inline functions. To preserve ABI compat, these members must not 108178778Sjhb * be disturbed. These members are marked below with (*). 109178778Sjhb */ 110178778Sjhbtypedef struct __sFILE { 111178778Sjhb unsigned char *_p; /* (*) current position in (some) buffer */ 112178778Sjhb int _r; /* (*) read space left for getc() */ 113178778Sjhb int _w; /* (*) write space left for putc() */ 114178778Sjhb short _flags; /* (*) flags, below; this FILE is free if 0 */ 115178778Sjhb short _file; /* (*) fileno, if Unix descriptor, else -1 */ 116178829Sjhb struct __sbuf _bf; /* (*) the buffer (at least 1 byte, if !NULL) */ 117178778Sjhb int _lbfsize; /* (*) 0 or -_bf._size, for inline putc */ 118178778Sjhb 119178778Sjhb /* operations */ 120178779Sjhb void *_cookie; /* (*) cookie passed to io functions */ 121178778Sjhb int (*_close)(void *); 122178778Sjhb int (*_read)(void *, char *, int); 123178778Sjhb fpos_t (*_seek)(void *, fpos_t, int); 124178778Sjhb int (*_write)(void *, const char *, int); 125178778Sjhb 126178778Sjhb /* separate buffer for long sequences of ungetc() */ 127178778Sjhb struct __sbuf _ub; /* ungetc buffer */ 128178778Sjhb unsigned char *_up; /* saved _p when _p is doing ungetc data */ 129178778Sjhb int _ur; /* saved _r when _r is counting ungetc data */ 130178778Sjhb 131178778Sjhb /* tricks to meet minimum requirements even when malloc() fails */ 132178778Sjhb unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ 133178778Sjhb unsigned char _nbuf[1]; /* guarantee a getc() buffer */ 134178778Sjhb 135178778Sjhb /* separate buffer for fgetln() when line crosses buffer boundary */ 136178778Sjhb struct __sbuf _lb; /* buffer for fgetln() */ 137178778Sjhb 138178778Sjhb /* Unix stdio files get aligned to block boundaries on fseek() */ 139178778Sjhb int _blksize; /* stat.st_blksize (may be != _bf._size) */ 140178778Sjhb fpos_t _offset; /* current lseek offset */ 141178778Sjhb 142178778Sjhb struct pthread_mutex *_fl_mutex; /* used for MT-safety */ 143178778Sjhb struct pthread *_fl_owner; /* current owner */ 144178778Sjhb int _fl_count; /* recursive lock count */ 145178778Sjhb int _orientation; /* orientation for fwide() */ 146178778Sjhb __mbstate_t _mbstate; /* multibyte conversion state */ 147178778Sjhb} FILE; 148178778Sjhb 149129774Stjr#ifndef _STDSTREAM_DECLARED 1501539Srgrimes__BEGIN_DECLS 15181600Speterextern FILE *__stdinp; 15281600Speterextern FILE *__stdoutp; 15381600Speterextern FILE *__stderrp; 1541539Srgrimes__END_DECLS 155129774Stjr#define _STDSTREAM_DECLARED 156129774Stjr#endif 1571539Srgrimes 158178778Sjhb#define __SLBF 0x0001 /* line buffered */ 159178778Sjhb#define __SNBF 0x0002 /* unbuffered */ 160178778Sjhb#define __SRD 0x0004 /* OK to read */ 161178778Sjhb#define __SWR 0x0008 /* OK to write */ 162178778Sjhb /* RD and WR are never simultaneously asserted */ 163178778Sjhb#define __SRW 0x0010 /* open for reading & writing */ 164178778Sjhb#define __SEOF 0x0020 /* found EOF */ 165178778Sjhb#define __SERR 0x0040 /* found error */ 166178778Sjhb#define __SMBF 0x0080 /* _buf is from malloc */ 167178778Sjhb#define __SAPP 0x0100 /* fdopen()ed in append mode */ 168178778Sjhb#define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 169178778Sjhb#define __SOPT 0x0400 /* do fseek() optimization */ 170178778Sjhb#define __SNPT 0x0800 /* do not do fseek() optimization */ 171178778Sjhb#define __SOFF 0x1000 /* set iff _offset is in fact correct */ 172178778Sjhb#define __SMOD 0x2000 /* true => fgetln modified _p text */ 173178778Sjhb#define __SALC 0x4000 /* allocate string space dynamically */ 174178778Sjhb#define __SIGN 0x8000 /* ignore this file in _fwalk */ 175178778Sjhb 1761539Srgrimes/* 1771539Srgrimes * The following three definitions are for ANSI C, which took them 1781539Srgrimes * from System V, which brilliantly took internal interface macros and 1791539Srgrimes * made them official arguments to setvbuf(), without renaming them. 1801539Srgrimes * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 181178778Sjhb * 182178778Sjhb * Although numbered as their counterparts above, the implementation 183178778Sjhb * does not rely on this. 1841539Srgrimes */ 1851539Srgrimes#define _IOFBF 0 /* setvbuf should set fully buffered */ 1861539Srgrimes#define _IOLBF 1 /* setvbuf should set line buffered */ 1871539Srgrimes#define _IONBF 2 /* setvbuf should set unbuffered */ 1881539Srgrimes 1891539Srgrimes#define BUFSIZ 1024 /* size of buffer used by setbuf */ 1901539Srgrimes#define EOF (-1) 1911539Srgrimes 1921539Srgrimes/* 1931539Srgrimes * FOPEN_MAX is a minimum maximum, and is the number of streams that 1941539Srgrimes * stdio can provide without attempting to allocate further resources 1951539Srgrimes * (which could fail). Do not use this for anything. 1961539Srgrimes */ 1971539Srgrimes /* must be == _POSIX_STREAM_MAX <limits.h> */ 198177653Sjb#ifndef FOPEN_MAX 1991539Srgrimes#define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 200177653Sjb#endif 2011539Srgrimes#define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 2021539Srgrimes 2031539Srgrimes/* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 204100133Swollman#if __XSI_VISIBLE 2051539Srgrimes#define P_tmpdir "/var/tmp/" 2061539Srgrimes#endif 2071539Srgrimes#define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 2081539Srgrimes#define TMP_MAX 308915776 2091539Srgrimes 2101539Srgrimes#ifndef SEEK_SET 2111539Srgrimes#define SEEK_SET 0 /* set file offset to offset */ 2121539Srgrimes#endif 2131539Srgrimes#ifndef SEEK_CUR 2141539Srgrimes#define SEEK_CUR 1 /* set file offset to current plus offset */ 2151539Srgrimes#endif 2161539Srgrimes#ifndef SEEK_END 2171539Srgrimes#define SEEK_END 2 /* set file offset to EOF plus offset */ 2181539Srgrimes#endif 2191539Srgrimes 22081600Speter#define stdin __stdinp 22181600Speter#define stdout __stdoutp 22281600Speter#define stderr __stderrp 2231539Srgrimes 224100133Swollman__BEGIN_DECLS 2251539Srgrimes/* 2261539Srgrimes * Functions defined in ANSI C standard. 2271539Srgrimes */ 22893032Simpvoid clearerr(FILE *); 22993032Simpint fclose(FILE *); 23093032Simpint feof(FILE *); 23193032Simpint ferror(FILE *); 23293032Simpint fflush(FILE *); 23393032Simpint fgetc(FILE *); 234104989Smikeint fgetpos(FILE * __restrict, fpos_t * __restrict); 235104989Smikechar *fgets(char * __restrict, int, FILE * __restrict); 236104989SmikeFILE *fopen(const char * __restrict, const char * __restrict); 237103012Stjrint fprintf(FILE * __restrict, const char * __restrict, ...); 23893032Simpint fputc(int, FILE *); 239104989Smikeint fputs(const char * __restrict, FILE * __restrict); 240104989Smikesize_t fread(void * __restrict, size_t, size_t, FILE * __restrict); 241104989SmikeFILE *freopen(const char * __restrict, const char * __restrict, FILE * __restrict); 242104989Smikeint fscanf(FILE * __restrict, const char * __restrict, ...); 24393032Simpint fseek(FILE *, long, int); 24493032Simpint fsetpos(FILE *, const fpos_t *); 24593032Simplong ftell(FILE *); 246104989Smikesize_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict); 24793032Simpint getc(FILE *); 24893032Simpint getchar(void); 24993032Simpchar *gets(char *); 25093032Simpvoid perror(const char *); 251103012Stjrint printf(const char * __restrict, ...); 25293032Simpint putc(int, FILE *); 25393032Simpint putchar(int); 25493032Simpint puts(const char *); 25593032Simpint remove(const char *); 25693032Simpint rename(const char *, const char *); 25793032Simpvoid rewind(FILE *); 258104989Smikeint scanf(const char * __restrict, ...); 259103012Stjrvoid setbuf(FILE * __restrict, char * __restrict); 260103012Stjrint setvbuf(FILE * __restrict, char * __restrict, int, size_t); 261103012Stjrint sprintf(char * __restrict, const char * __restrict, ...); 262104989Smikeint sscanf(const char * __restrict, const char * __restrict, ...); 26393032SimpFILE *tmpfile(void); 26493032Simpchar *tmpnam(char *); 26593032Simpint ungetc(int, FILE *); 266103012Stjrint vfprintf(FILE * __restrict, const char * __restrict, 267102227Smike __va_list); 268103012Stjrint vprintf(const char * __restrict, __va_list); 269103012Stjrint vsprintf(char * __restrict, const char * __restrict, 270102227Smike __va_list); 2711539Srgrimes 272100133Swollman#if __ISO_C_VISIBLE >= 1999 273103012Stjrint snprintf(char * __restrict, size_t, const char * __restrict, 274101914Srobert ...) __printflike(3, 4); 275105098Stjrint vfscanf(FILE * __restrict, const char * __restrict, __va_list) 276105098Stjr __scanflike(2, 0); 277104989Smikeint vscanf(const char * __restrict, __va_list) __scanflike(1, 0); 278103012Stjrint vsnprintf(char * __restrict, size_t, const char * __restrict, 279102227Smike __va_list) __printflike(3, 0); 280104989Smikeint vsscanf(const char * __restrict, const char * __restrict, __va_list) 281104585Smike __scanflike(2, 0); 282100133Swollman#endif 283100133Swollman 2841539Srgrimes/* 285100133Swollman * Functions defined in all versions of POSIX 1003.1. 2861539Srgrimes */ 287104585Smike#if __BSD_VISIBLE || __POSIX_VISIBLE <= 199506 28819211Swosch/* size for cuserid(3); UT_NAMESIZE + 1, see <utmp.h> */ 289104585Smike#define L_cuserid 17 /* legacy */ 290104585Smike#endif 2911539Srgrimes 292104585Smike#if __POSIX_VISIBLE 29319211Swosch#define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */ 29419211Swosch 29593032Simpchar *ctermid(char *); 29693032SimpFILE *fdopen(int, const char *); 29793032Simpint fileno(FILE *); 298100133Swollman#endif /* __POSIX_VISIBLE */ 299100133Swollman 300100133Swollman#if __POSIX_VISIBLE >= 199209 301100133Swollmanint pclose(FILE *); 302100133SwollmanFILE *popen(const char *, const char *); 303100133Swollman#endif 304100133Swollman 305100133Swollman#if __POSIX_VISIBLE >= 199506 30693032Simpint ftrylockfile(FILE *); 30793032Simpvoid flockfile(FILE *); 30893032Simpvoid funlockfile(FILE *); 3091539Srgrimes 3101539Srgrimes/* 311178778Sjhb * These are normally used through macros as defined below, but POSIX 312178778Sjhb * requires functions as well. 31324897Sbde */ 314100133Swollmanint getc_unlocked(FILE *); 315100133Swollmanint getchar_unlocked(void); 316100133Swollmanint putc_unlocked(int, FILE *); 317100133Swollmanint putchar_unlocked(int); 31824897Sbde#endif 319109168Stjr#if __BSD_VISIBLE 320178722Sjhbvoid clearerr_unlocked(FILE *); 321178722Sjhbint feof_unlocked(FILE *); 322178722Sjhbint ferror_unlocked(FILE *); 323178722Sjhbint fileno_unlocked(FILE *); 324109168Stjr#endif 325100133Swollman 326100133Swollman#if __POSIX_VISIBLE >= 200112 327102227Smikeint fseeko(FILE *, __off_t, int); 328102227Smike__off_t ftello(FILE *); 32924897Sbde#endif 330100133Swollman 331100133Swollman#if __BSD_VISIBLE || __XSI_VISIBLE > 0 && __XSI_VISIBLE < 600 332100133Swollmanint getw(FILE *); 333100133Swollmanint putw(int, FILE *); 334100133Swollman#endif /* BSD or X/Open before issue 6 */ 335100133Swollman 336100133Swollman#if __XSI_VISIBLE 337100133Swollmanchar *tempnam(const char *, const char *); 33824897Sbde#endif 33924897Sbde 340189136Sdas#if __BSD_VISIBLE || __POSIX_VISIBLE >= 200809 341189136Sdasssize_t getdelim(char ** __restrict, size_t * __restrict, int, 342189136Sdas FILE * __restrict); 343189355Sdasint renameat(int, const char *, int, const char *); 344189356Sdasint vdprintf(int, const char * __restrict, __va_list); 345189136Sdas 34624897Sbde/* 347189356Sdas * Every programmer and his dog wrote functions called getline() and dprintf() 348189356Sdas * before POSIX.1-2008 came along and decided to usurp the names, so we 349189356Sdas * don't prototype them by default unless one of the following is true: 350189356Sdas * a) the app has requested them specifically by defining _WITH_GETLINE or 351189356Sdas * _WITH_DPRINTF, respectively 352189136Sdas * b) the app has requested a POSIX.1-2008 environment via _POSIX_C_SOURCE 353189136Sdas * c) the app defines a GNUism such as _BSD_SOURCE or _GNU_SOURCE 354189136Sdas */ 355189136Sdas#ifndef _WITH_GETLINE 356189136Sdas#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE) 357189136Sdas#define _WITH_GETLINE 358189136Sdas#elif defined(_POSIX_C_SOURCE) 359189818Sdas#if _POSIX_C_SOURCE >= 200809 360189136Sdas#define _WITH_GETLINE 361189136Sdas#endif 362189136Sdas#endif 363189136Sdas#endif 364189136Sdas 365189136Sdas#ifdef _WITH_GETLINE 366189136Sdasssize_t getline(char ** __restrict, size_t * __restrict, FILE * __restrict); 367189136Sdas#endif 368189136Sdas 369189356Sdas#ifndef _WITH_DPRINTF 370189356Sdas#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE) 371189356Sdas#define _WITH_DPRINTF 372189356Sdas#elif defined(_POSIX_C_SOURCE) 373189818Sdas#if _POSIX_C_SOURCE >= 200809 374189356Sdas#define _WITH_DPRINTF 375189356Sdas#endif 376189356Sdas#endif 377189356Sdas#endif 378189356Sdas 379189356Sdas#ifdef _WITH_DPRINTF 380190409Sdasint (dprintf)(int, const char * __restrict, ...); 381189356Sdas#endif 382189356Sdas 383189136Sdas#endif /* __BSD_VISIBLE || __POSIX_VISIBLE >= 200809 */ 384189136Sdas 385189136Sdas/* 3861539Srgrimes * Routines that are purely local. 3871539Srgrimes */ 388100133Swollman#if __BSD_VISIBLE 38993032Simpint asprintf(char **, const char *, ...) __printflike(2, 3); 39093032Simpchar *ctermid_r(char *); 391178722Sjhbvoid fcloseall(void); 39293032Simpchar *fgetln(FILE *, size_t *); 393194801Sdelphijconst char *fmtcheck(const char *, const char *) __format_arg(2); 39493032Simpint fpurge(FILE *); 39593032Simpvoid setbuffer(FILE *, char *, int); 39693032Simpint setlinebuf(FILE *); 397102227Smikeint vasprintf(char **, const char *, __va_list) 39837614Sbde __printflike(2, 0); 3991539Srgrimes 4001539Srgrimes/* 401100133Swollman * The system error table contains messages for the first sys_nerr 402100133Swollman * positive errno values. Use strerror() or strerror_r() from <string.h> 403100133Swollman * instead. 404100133Swollman */ 405100133Swollmanextern __const int sys_nerr; 406100133Swollmanextern __const char *__const sys_errlist[]; 407100133Swollman 408100133Swollman/* 4091539Srgrimes * Stdio function-access interface. 4101539Srgrimes */ 41193032SimpFILE *funopen(const void *, 41275818Sobrien int (*)(void *, char *, int), 41375818Sobrien int (*)(void *, const char *, int), 41475818Sobrien fpos_t (*)(void *, fpos_t, int), 41593032Simp int (*)(void *)); 4161539Srgrimes#define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 4171539Srgrimes#define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 4181539Srgrimes 4191539Srgrimes/* 420100133Swollman * Portability hacks. See <sys/types.h>. 421100133Swollman */ 422100133Swollman#ifndef _FTRUNCATE_DECLARED 423100133Swollman#define _FTRUNCATE_DECLARED 424102227Smikeint ftruncate(int, __off_t); 425100133Swollman#endif 426100133Swollman#ifndef _LSEEK_DECLARED 427100133Swollman#define _LSEEK_DECLARED 428102227Smike__off_t lseek(int, __off_t, int); 429100133Swollman#endif 430100133Swollman#ifndef _MMAP_DECLARED 431100133Swollman#define _MMAP_DECLARED 432102227Smikevoid *mmap(void *, size_t, int, int, int, __off_t); 433100133Swollman#endif 434100133Swollman#ifndef _TRUNCATE_DECLARED 435100133Swollman#define _TRUNCATE_DECLARED 436102227Smikeint truncate(const char *, __off_t); 437100133Swollman#endif 438100133Swollman#endif /* __BSD_VISIBLE */ 439100133Swollman 440178778Sjhb/* 441178778Sjhb * Functions internal to the implementation. 442178778Sjhb */ 443178778Sjhbint __srget(FILE *); 444178778Sjhbint __swbuf(int, FILE *); 445178778Sjhb 446178778Sjhb/* 447178778Sjhb * The __sfoo macros are here so that we can 448178778Sjhb * define function versions in the C library. 449178778Sjhb */ 450178778Sjhb#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 451178778Sjhb#if defined(__GNUC__) && defined(__STDC__) 452178778Sjhbstatic __inline int __sputc(int _c, FILE *_p) { 453178778Sjhb if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 454178778Sjhb return (*_p->_p++ = _c); 455178778Sjhb else 456178778Sjhb return (__swbuf(_c, _p)); 457178778Sjhb} 458178778Sjhb#else 459178778Sjhb/* 460178778Sjhb * This has been tuned to generate reasonable code on the vax using pcc. 461178778Sjhb */ 462178778Sjhb#define __sputc(c, p) \ 463178778Sjhb (--(p)->_w < 0 ? \ 464178778Sjhb (p)->_w >= (p)->_lbfsize ? \ 465178778Sjhb (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 466178778Sjhb (int)*(p)->_p++ : \ 467178778Sjhb __swbuf('\n', p) : \ 468178778Sjhb __swbuf((int)(c), p) : \ 469178778Sjhb (*(p)->_p = (c), (int)*(p)->_p++)) 470178778Sjhb#endif 471178778Sjhb 472178778Sjhb#define __sfeof(p) (((p)->_flags & __SEOF) != 0) 473178778Sjhb#define __sferror(p) (((p)->_flags & __SERR) != 0) 474178778Sjhb#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 475178778Sjhb#define __sfileno(p) ((p)->_file) 476178778Sjhb 477178778Sjhbextern int __isthreaded; 478178778Sjhb 479178778Sjhb#define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p)) 480178778Sjhb#define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p)) 481178778Sjhb#define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p)) 482178778Sjhb 483178778Sjhb#if __POSIX_VISIBLE 484178778Sjhb#define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p)) 485178778Sjhb#endif 486178778Sjhb 487178778Sjhb#define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp)) 488178778Sjhb#define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp)) 489178778Sjhb 490178778Sjhb#define getchar() getc(stdin) 491178778Sjhb#define putchar(x) putc(x, stdout) 492178778Sjhb 493178778Sjhb#if __BSD_VISIBLE 494178778Sjhb/* 495178778Sjhb * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12 496178778Sjhb * B.8.2.7 for the rationale behind the *_unlocked() macros. 497178778Sjhb */ 498178778Sjhb#define feof_unlocked(p) __sfeof(p) 499178778Sjhb#define ferror_unlocked(p) __sferror(p) 500178778Sjhb#define clearerr_unlocked(p) __sclearerr(p) 501178778Sjhb#define fileno_unlocked(p) __sfileno(p) 502178778Sjhb#endif 503178778Sjhb#if __POSIX_VISIBLE >= 199506 504178778Sjhb#define getc_unlocked(fp) __sgetc(fp) 505178778Sjhb#define putc_unlocked(x, fp) __sputc(x, fp) 506178778Sjhb 507178778Sjhb#define getchar_unlocked() getc_unlocked(stdin) 508178778Sjhb#define putchar_unlocked(x) putc_unlocked(x, stdout) 509178778Sjhb#endif 510178778Sjhb 511100133Swollman__END_DECLS 51224897Sbde#endif /* !_STDIO_H_ */ 513