45d8008748
lock definitions to it. flockfile state is now allocated along with the rest of FILE. This eliminates the need for a separate allocation of flockfile state as well as eliminating the mutex/lock used to serialize its allocation.
404 lines
13 KiB
C
404 lines
13 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)stdio.h 8.5 (Berkeley) 4/29/95
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* $FreeBSD$
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*/
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#ifndef _STDIO_H_
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#define _STDIO_H_
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#include <sys/cdefs.h>
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#include <machine/ansi.h>
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#ifdef _BSD_SIZE_T_
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typedef _BSD_SIZE_T_ size_t;
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#undef _BSD_SIZE_T_
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#endif
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#ifndef NULL
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#define NULL 0
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#endif
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typedef _BSD_OFF_T_ fpos_t;
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#define _FSTDIO /* Define for new stdio with functions. */
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/*
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* NB: to fit things in six character monocase externals, the stdio
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* code uses the prefix `__s' for stdio objects, typically followed
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* by a three-character attempt at a mnemonic.
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*/
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/* stdio buffers */
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struct __sbuf {
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unsigned char *_base;
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int _size;
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};
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/* hold a buncha junk that would grow the ABI */
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struct __sFILEX;
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/*
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* stdio state variables.
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*
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* The following always hold:
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*
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* if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
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* _lbfsize is -_bf._size, else _lbfsize is 0
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* if _flags&__SRD, _w is 0
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* if _flags&__SWR, _r is 0
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*
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* This ensures that the getc and putc macros (or inline functions) never
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* try to write or read from a file that is in `read' or `write' mode.
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* (Moreover, they can, and do, automatically switch from read mode to
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* write mode, and back, on "r+" and "w+" files.)
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*
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* _lbfsize is used only to make the inline line-buffered output stream
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* code as compact as possible.
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*
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* _ub, _up, and _ur are used when ungetc() pushes back more characters
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* than fit in the current _bf, or when ungetc() pushes back a character
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* that does not match the previous one in _bf. When this happens,
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* _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
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* _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
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*
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* NB: see WARNING above before changing the layout of this structure!
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*/
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typedef struct __sFILE {
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unsigned char *_p; /* current position in (some) buffer */
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int _r; /* read space left for getc() */
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int _w; /* write space left for putc() */
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short _flags; /* flags, below; this FILE is free if 0 */
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short _file; /* fileno, if Unix descriptor, else -1 */
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struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
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int _lbfsize; /* 0 or -_bf._size, for inline putc */
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/* operations */
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void *_cookie; /* cookie passed to io functions */
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int (*_close) __P((void *));
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int (*_read) __P((void *, char *, int));
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fpos_t (*_seek) __P((void *, fpos_t, int));
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int (*_write) __P((void *, const char *, int));
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/* separate buffer for long sequences of ungetc() */
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struct __sbuf _ub; /* ungetc buffer */
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struct __sFILEX *_extra; /* additions to FILE to not break ABI */
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int _ur; /* saved _r when _r is counting ungetc data */
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/* tricks to meet minimum requirements even when malloc() fails */
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unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
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unsigned char _nbuf[1]; /* guarantee a getc() buffer */
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/* separate buffer for fgetln() when line crosses buffer boundary */
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struct __sbuf _lb; /* buffer for fgetln() */
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/* Unix stdio files get aligned to block boundaries on fseek() */
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int _blksize; /* stat.st_blksize (may be != _bf._size) */
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fpos_t _offset; /* current lseek offset (see WARNING) */
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} FILE;
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__BEGIN_DECLS
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extern FILE __sF[];
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__END_DECLS
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#define __SLBF 0x0001 /* line buffered */
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#define __SNBF 0x0002 /* unbuffered */
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#define __SRD 0x0004 /* OK to read */
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#define __SWR 0x0008 /* OK to write */
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/* RD and WR are never simultaneously asserted */
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#define __SRW 0x0010 /* open for reading & writing */
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#define __SEOF 0x0020 /* found EOF */
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#define __SERR 0x0040 /* found error */
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#define __SMBF 0x0080 /* _buf is from malloc */
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#define __SAPP 0x0100 /* fdopen()ed in append mode */
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#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
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#define __SOPT 0x0400 /* do fseek() optimization */
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#define __SNPT 0x0800 /* do not do fseek() optimization */
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#define __SOFF 0x1000 /* set iff _offset is in fact correct */
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#define __SMOD 0x2000 /* true => fgetln modified _p text */
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#define __SALC 0x4000 /* allocate string space dynamically */
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#define __SIGN 0x8000 /* ignore this file in _fwalk */
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/*
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* The following three definitions are for ANSI C, which took them
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* from System V, which brilliantly took internal interface macros and
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* made them official arguments to setvbuf(), without renaming them.
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* Hence, these ugly _IOxxx names are *supposed* to appear in user code.
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*
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* Although numbered as their counterparts above, the implementation
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* does not rely on this.
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*/
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#define _IOFBF 0 /* setvbuf should set fully buffered */
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#define _IOLBF 1 /* setvbuf should set line buffered */
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#define _IONBF 2 /* setvbuf should set unbuffered */
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#define BUFSIZ 1024 /* size of buffer used by setbuf */
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#define EOF (-1)
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/*
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* FOPEN_MAX is a minimum maximum, and is the number of streams that
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* stdio can provide without attempting to allocate further resources
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* (which could fail). Do not use this for anything.
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*/
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/* must be == _POSIX_STREAM_MAX <limits.h> */
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#define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */
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#define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */
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/* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
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#ifndef _ANSI_SOURCE
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#define P_tmpdir "/var/tmp/"
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#endif
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#define L_tmpnam 1024 /* XXX must be == PATH_MAX */
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#define TMP_MAX 308915776
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#ifndef SEEK_SET
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#define SEEK_SET 0 /* set file offset to offset */
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#endif
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#ifndef SEEK_CUR
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#define SEEK_CUR 1 /* set file offset to current plus offset */
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#endif
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#ifndef SEEK_END
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#define SEEK_END 2 /* set file offset to EOF plus offset */
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#endif
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#define stdin (&__sF[0])
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#define stdout (&__sF[1])
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#define stderr (&__sF[2])
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/*
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* Functions defined in ANSI C standard.
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*/
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__BEGIN_DECLS
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void clearerr __P((FILE *));
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int fclose __P((FILE *));
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int feof __P((FILE *));
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int ferror __P((FILE *));
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int fflush __P((FILE *));
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int fgetc __P((FILE *));
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int fgetpos __P((FILE *, fpos_t *));
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char *fgets __P((char *, int, FILE *));
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FILE *fopen __P((const char *, const char *));
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int fprintf __P((FILE *, const char *, ...));
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int fputc __P((int, FILE *));
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int fputs __P((const char *, FILE *));
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size_t fread __P((void *, size_t, size_t, FILE *));
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FILE *freopen __P((const char *, const char *, FILE *));
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int fscanf __P((FILE *, const char *, ...));
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int fseek __P((FILE *, long, int));
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int fsetpos __P((FILE *, const fpos_t *));
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long ftell __P((FILE *));
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size_t fwrite __P((const void *, size_t, size_t, FILE *));
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int getc __P((FILE *));
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int getchar __P((void));
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char *gets __P((char *));
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#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
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extern __const int sys_nerr; /* perror(3) external variables */
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extern __const char *__const sys_errlist[];
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#endif
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void perror __P((const char *));
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int printf __P((const char *, ...));
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int putc __P((int, FILE *));
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int putchar __P((int));
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int puts __P((const char *));
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int remove __P((const char *));
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int rename __P((const char *, const char *));
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void rewind __P((FILE *));
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int scanf __P((const char *, ...));
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void setbuf __P((FILE *, char *));
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int setvbuf __P((FILE *, char *, int, size_t));
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int sprintf __P((char *, const char *, ...));
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int sscanf __P((const char *, const char *, ...));
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FILE *tmpfile __P((void));
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char *tmpnam __P((char *));
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int ungetc __P((int, FILE *));
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int vfprintf __P((FILE *, const char *, _BSD_VA_LIST_));
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int vprintf __P((const char *, _BSD_VA_LIST_));
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int vsprintf __P((char *, const char *, _BSD_VA_LIST_));
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__END_DECLS
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/*
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* Functions defined in POSIX 1003.1.
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*/
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#ifndef _ANSI_SOURCE
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/* size for cuserid(3); UT_NAMESIZE + 1, see <utmp.h> */
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#define L_cuserid 17
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#define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */
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__BEGIN_DECLS
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char *ctermid __P((char *));
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FILE *fdopen __P((int, const char *));
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int fileno __P((FILE *));
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int ftrylockfile __P((FILE *));
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void flockfile __P((FILE *));
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void funlockfile __P((FILE *));
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__END_DECLS
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#endif /* not ANSI */
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/*
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* Portability hacks. See <sys/types.h>.
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*/
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#if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
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__BEGIN_DECLS
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#ifndef _FTRUNCATE_DECLARED
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#define _FTRUNCATE_DECLARED
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int ftruncate __P((int, _BSD_OFF_T_));
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#endif
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#ifndef _LSEEK_DECLARED
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#define _LSEEK_DECLARED
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_BSD_OFF_T_ lseek __P((int, _BSD_OFF_T_, int));
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#endif
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#ifndef _MMAP_DECLARED
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#define _MMAP_DECLARED
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void *mmap __P((void *, size_t, int, int, int, _BSD_OFF_T_));
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#endif
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#ifndef _TRUNCATE_DECLARED
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#define _TRUNCATE_DECLARED
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int truncate __P((const char *, _BSD_OFF_T_));
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#endif
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__END_DECLS
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#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
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/*
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* Routines that are purely local.
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*/
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#if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
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__BEGIN_DECLS
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int asprintf __P((char **, const char *, ...)) __printflike(2, 3);
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char *ctermid_r __P((char *));
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char *fgetln __P((FILE *, size_t *));
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int fpurge __P((FILE *));
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int fseeko __P((FILE *, _BSD_OFF_T_, int));
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_BSD_OFF_T_ ftello __P((FILE *));
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int getw __P((FILE *));
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int pclose __P((FILE *));
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FILE *popen __P((const char *, const char *));
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int putw __P((int, FILE *));
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void setbuffer __P((FILE *, char *, int));
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int setlinebuf __P((FILE *));
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char *tempnam __P((const char *, const char *));
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int snprintf __P((char *, size_t, const char *, ...)) __printflike(3, 4);
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int vasprintf __P((char **, const char *, _BSD_VA_LIST_))
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__printflike(2, 0);
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int vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_))
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__printflike(3, 0);
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int vscanf __P((const char *, _BSD_VA_LIST_)) __scanflike(1, 0);
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int vsscanf __P((const char *, const char *, _BSD_VA_LIST_))
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__scanflike(2, 0);
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__END_DECLS
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/*
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* This is a #define because the function is used internally and
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* (unlike vfscanf) the name __vfscanf is guaranteed not to collide
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* with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined.
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*/
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#define vfscanf __vfscanf
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/*
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* Stdio function-access interface.
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*/
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__BEGIN_DECLS
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FILE *funopen __P((const void *,
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int (*)(void *, char *, int),
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int (*)(void *, const char *, int),
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fpos_t (*)(void *, fpos_t, int),
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int (*)(void *)));
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__END_DECLS
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#define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
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#define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
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#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
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/*
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* Functions internal to the implementation.
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*/
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__BEGIN_DECLS
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int __srget __P((FILE *));
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int __vfscanf __P((FILE *, const char *, _BSD_VA_LIST_));
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int __svfscanf __P((FILE *, const char *, _BSD_VA_LIST_));
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int __swbuf __P((int, FILE *));
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__END_DECLS
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/*
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* The __sfoo macros are here so that we can
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* define function versions in the C library.
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*/
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#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
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#if defined(__GNUC__) && defined(__STDC__)
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static __inline int __sputc(int _c, FILE *_p) {
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if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
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return (*_p->_p++ = _c);
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else
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return (__swbuf(_c, _p));
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}
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#else
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/*
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* This has been tuned to generate reasonable code on the vax using pcc.
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*/
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#define __sputc(c, p) \
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(--(p)->_w < 0 ? \
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(p)->_w >= (p)->_lbfsize ? \
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(*(p)->_p = (c)), *(p)->_p != '\n' ? \
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(int)*(p)->_p++ : \
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__swbuf('\n', p) : \
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__swbuf((int)(c), p) : \
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(*(p)->_p = (c), (int)*(p)->_p++))
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#endif
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#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
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#define __sferror(p) (((p)->_flags & __SERR) != 0)
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#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
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#define __sfileno(p) ((p)->_file)
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/*
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* See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12
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* B.8.2.7 for the rationale behind the *_unlocked() macros.
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*/
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#define feof_unlocked(p) __sfeof(p)
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#define ferror_unlocked(p) __sferror(p)
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#define clearerr_unlocked(p) __sclearerr(p)
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#ifndef _ANSI_SOURCE
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#define fileno_unlocked(p) __sfileno(p)
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#endif
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#define getc_unlocked(fp) __sgetc(fp)
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#define putc_unlocked(x, fp) __sputc(x, fp)
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#define getchar_unlocked() getc_unlocked(stdin)
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#define putchar_unlocked(x) putc_unlocked(x, stdout)
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#endif /* !_STDIO_H_ */
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