Expose FILE's internals to the world again in all their glory. Restore
all the previous inline optimizations as well. FILE is back to using __mbstate_t, struct pthread *, and struct pthread_mutex *.
This commit is contained in:
parent
97752dfdc7
commit
19e03ca803
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=178778
176
include/stdio.h
176
include/stdio.h
@ -60,8 +60,84 @@ typedef __va_list va_list;
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#define _FSTDIO /* Define for new stdio with functions. */
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#define _FSTDIO /* Define for new stdio with functions. */
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struct __sFILE;
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/*
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typedef struct __sFILE FILE;
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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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/*
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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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* Certain members of __sFILE are accessed directly via macros or
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* inline functions. To preserve ABI compat, these members must not
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* be disturbed. These members are marked below with (*).
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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)(void *);
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int (*_read)(void *, char *, int);
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fpos_t (*_seek)(void *, fpos_t, int);
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int (*_write)(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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unsigned char *_up; /* saved _p when _p is doing ungetc data */
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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 */
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struct pthread_mutex *_fl_mutex; /* used for MT-safety */
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struct pthread *_fl_owner; /* current owner */
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int _fl_count; /* recursive lock count */
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int _orientation; /* orientation for fwide() */
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__mbstate_t _mbstate; /* multibyte conversion state */
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} FILE;
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#ifndef _STDSTREAM_DECLARED
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#ifndef _STDSTREAM_DECLARED
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__BEGIN_DECLS
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__BEGIN_DECLS
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@ -72,11 +148,32 @@ __END_DECLS
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#define _STDSTREAM_DECLARED
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#define _STDSTREAM_DECLARED
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#endif
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#endif
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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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/*
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* The following three definitions are for ANSI C, which took them
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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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* 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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* 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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* 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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*/
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#define _IOFBF 0 /* setvbuf should set fully buffered */
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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 _IOLBF 1 /* setvbuf should set line buffered */
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@ -204,8 +301,8 @@ void flockfile(FILE *);
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void funlockfile(FILE *);
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void funlockfile(FILE *);
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/*
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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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* These are normally used through macros as defined below, but POSIX
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* B.8.2.7 for the rationale behind the *_unlocked() functions.
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* requires functions as well.
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*/
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*/
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int getc_unlocked(FILE *);
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int getc_unlocked(FILE *);
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int getchar_unlocked(void);
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int getchar_unlocked(void);
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@ -295,5 +392,76 @@ int truncate(const char *, __off_t);
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#endif
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#endif
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#endif /* __BSD_VISIBLE */
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#endif /* __BSD_VISIBLE */
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/*
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* Functions internal to the implementation.
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*/
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int __srget(FILE *);
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int __swbuf(int, FILE *);
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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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extern int __isthreaded;
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#define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p))
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#define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p))
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#define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p))
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#if __POSIX_VISIBLE
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#define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p))
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#endif
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#define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp))
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#define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp))
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#define getchar() getc(stdin)
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#define putchar(x) putc(x, stdout)
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#if __BSD_VISIBLE
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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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#define fileno_unlocked(p) __sfileno(p)
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#endif
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#if __POSIX_VISIBLE >= 199506
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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
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__END_DECLS
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__END_DECLS
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#endif /* !_STDIO_H_ */
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#endif /* !_STDIO_H_ */
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@ -39,10 +39,10 @@ __FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include "namespace.h"
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#include <stdio.h>
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#include <stdio.h>
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#include "un-namespace.h"
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#include "un-namespace.h"
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#include "local.h"
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#include "libc_private.h"
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#include "libc_private.h"
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#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
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#undef clearerr
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#undef clearerr_unlocked
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void
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void
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clearerr(fp)
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clearerr(fp)
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@ -39,10 +39,10 @@ __FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include "namespace.h"
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#include <stdio.h>
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#include <stdio.h>
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#include "un-namespace.h"
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#include "un-namespace.h"
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#include "local.h"
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#include "libc_private.h"
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#include "libc_private.h"
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#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
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#undef feof
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#undef feof_unlocked
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int
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int
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feof(FILE *fp)
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feof(FILE *fp)
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@ -39,9 +39,11 @@ __FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include "namespace.h"
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#include <stdio.h>
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#include <stdio.h>
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#include "un-namespace.h"
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#include "un-namespace.h"
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#include "local.h"
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#include "libc_private.h"
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#include "libc_private.h"
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#undef ferror
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#undef ferror_unlocked
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int
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int
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ferror(FILE *fp)
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ferror(FILE *fp)
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{
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{
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@ -39,10 +39,10 @@ __FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include "namespace.h"
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#include <stdio.h>
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#include <stdio.h>
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#include "un-namespace.h"
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#include "un-namespace.h"
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#include "local.h"
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#include "libc_private.h"
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#include "libc_private.h"
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#define __sfileno(p) ((p)->_file)
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#undef fileno
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#undef fileno_unlocked
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int
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int
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fileno(FILE *fp)
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fileno(FILE *fp)
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@ -42,6 +42,9 @@ __FBSDID("$FreeBSD$");
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#include "libc_private.h"
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#include "libc_private.h"
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#include "local.h"
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#include "local.h"
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#undef getc
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#undef getc_unlocked
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int
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int
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getc(FILE *fp)
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getc(FILE *fp)
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{
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{
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@ -45,6 +45,9 @@ __FBSDID("$FreeBSD$");
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#include "local.h"
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#include "local.h"
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#include "libc_private.h"
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#include "libc_private.h"
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#undef getchar
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#undef getchar_unlocked
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int
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int
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getchar()
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getchar()
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{
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{
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@ -39,106 +39,10 @@
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#include <wchar.h>
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#include <wchar.h>
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/*
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/*
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* Information local to this implementation of stdio, in particular,
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* Information local to this implementation of stdio,
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* macros, private functions, private variables, and the definition of
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* in particular, macros and private variables.
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* FILE.
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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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*/
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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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/*
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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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|
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* Certain members of __sFILE are accessed directly via macros or
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|
||||||
* inline functions. To preserve ABI compat, these members must not
|
|
||||||
* be disturbed. These members are marked below with (*).
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*/
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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 */
|
|
||||||
|
|
||||||
/* operations */
|
|
||||||
void *_cookie; /* cookie passed to io functions */
|
|
||||||
int (*_close)(void *);
|
|
||||||
int (*_read)(void *, char *, int);
|
|
||||||
fpos_t (*_seek)(void *, fpos_t, int);
|
|
||||||
int (*_write)(void *, const char *, int);
|
|
||||||
|
|
||||||
/* separate buffer for long sequences of ungetc() */
|
|
||||||
struct __sbuf _ub; /* ungetc buffer */
|
|
||||||
unsigned char *_up; /* saved _p when _p is doing ungetc data */
|
|
||||||
int _ur; /* saved _r when _r is counting ungetc data */
|
|
||||||
|
|
||||||
/* tricks to meet minimum requirements even when malloc() fails */
|
|
||||||
unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
|
|
||||||
unsigned char _nbuf[1]; /* guarantee a getc() buffer */
|
|
||||||
|
|
||||||
/* separate buffer for fgetln() when line crosses buffer boundary */
|
|
||||||
struct __sbuf _lb; /* buffer for fgetln() */
|
|
||||||
|
|
||||||
/* Unix stdio files get aligned to block boundaries on fseek() */
|
|
||||||
int _blksize; /* stat.st_blksize (may be != _bf._size) */
|
|
||||||
fpos_t _offset; /* current lseek offset */
|
|
||||||
|
|
||||||
pthread_mutex_t _fl_mutex; /* used for MT-safety */
|
|
||||||
pthread_t _fl_owner; /* current owner */
|
|
||||||
int _fl_count; /* recursive lock count */
|
|
||||||
int _orientation; /* orientation for fwide() */
|
|
||||||
mbstate_t _mbstate; /* multibyte conversion state */
|
|
||||||
};
|
|
||||||
|
|
||||||
#define __SLBF 0x0001 /* line buffered */
|
|
||||||
#define __SNBF 0x0002 /* unbuffered */
|
|
||||||
#define __SRD 0x0004 /* OK to read */
|
|
||||||
#define __SWR 0x0008 /* OK to write */
|
|
||||||
/* RD and WR are never simultaneously asserted */
|
|
||||||
#define __SRW 0x0010 /* open for reading & writing */
|
|
||||||
#define __SEOF 0x0020 /* found EOF */
|
|
||||||
#define __SERR 0x0040 /* found error */
|
|
||||||
#define __SMBF 0x0080 /* _buf is from malloc */
|
|
||||||
#define __SAPP 0x0100 /* fdopen()ed in append mode */
|
|
||||||
#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
|
|
||||||
#define __SOPT 0x0400 /* do fseek() optimization */
|
|
||||||
#define __SNPT 0x0800 /* do not do fseek() optimization */
|
|
||||||
#define __SOFF 0x1000 /* set iff _offset is in fact correct */
|
|
||||||
#define __SMOD 0x2000 /* true => fgetln modified _p text */
|
|
||||||
#define __SALC 0x4000 /* allocate string space dynamically */
|
|
||||||
#define __SIGN 0x8000 /* ignore this file in _fwalk */
|
|
||||||
|
|
||||||
extern int _sread(FILE *, char *, int);
|
extern int _sread(FILE *, char *, int);
|
||||||
extern int _swrite(FILE *, char const *, int);
|
extern int _swrite(FILE *, char const *, int);
|
||||||
extern fpos_t _sseek(FILE *, fpos_t, int);
|
extern fpos_t _sseek(FILE *, fpos_t, int);
|
||||||
@ -153,8 +57,6 @@ extern FILE *__sfp(void);
|
|||||||
extern int __slbexpand(FILE *, size_t);
|
extern int __slbexpand(FILE *, size_t);
|
||||||
extern int __srefill(FILE *);
|
extern int __srefill(FILE *);
|
||||||
extern int __sread(void *, char *, int);
|
extern int __sread(void *, char *, int);
|
||||||
extern int __srget(FILE *);
|
|
||||||
extern int __swbuf(int, FILE *);
|
|
||||||
extern int __swrite(void *, char const *, int);
|
extern int __swrite(void *, char const *, int);
|
||||||
extern fpos_t __sseek(void *, fpos_t, int);
|
extern fpos_t __sseek(void *, fpos_t, int);
|
||||||
extern int __sclose(void *);
|
extern int __sclose(void *);
|
||||||
@ -178,38 +80,6 @@ extern size_t __fread(void * __restrict buf, size_t size, size_t count,
|
|||||||
extern int __sdidinit;
|
extern int __sdidinit;
|
||||||
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Get and store individual characters from a file stream.
|
|
||||||
*/
|
|
||||||
#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
|
|
||||||
#if defined(__GNUC__) && defined(__STDC__)
|
|
||||||
static __inline int
|
|
||||||
__sputc(int _c, FILE *_p)
|
|
||||||
{
|
|
||||||
if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
|
|
||||||
return (*_p->_p++ = _c);
|
|
||||||
else
|
|
||||||
return (__swbuf(_c, _p));
|
|
||||||
}
|
|
||||||
#else
|
|
||||||
/*
|
|
||||||
* This has been tuned to generate reasonable code on the vax using pcc.
|
|
||||||
*/
|
|
||||||
#define __sputc(c, p) \
|
|
||||||
(--(p)->_w < 0 ? \
|
|
||||||
(p)->_w >= (p)->_lbfsize ? \
|
|
||||||
(*(p)->_p = (c)), *(p)->_p != '\n' ? \
|
|
||||||
(int)*(p)->_p++ : \
|
|
||||||
__swbuf('\n', p) : \
|
|
||||||
__swbuf((int)(c), p) : \
|
|
||||||
(*(p)->_p = (c), (int)*(p)->_p++))
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Return true if the file stream has encountered an error.
|
|
||||||
*/
|
|
||||||
#define __sferror(p) (((p)->_flags & __SERR) != 0)
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Prepare the given FILE for writing, and return 0 iff it
|
* Prepare the given FILE for writing, and return 0 iff it
|
||||||
* can be written now. Otherwise, return EOF and set errno.
|
* can be written now. Otherwise, return EOF and set errno.
|
||||||
|
@ -42,6 +42,9 @@ __FBSDID("$FreeBSD$");
|
|||||||
#include "local.h"
|
#include "local.h"
|
||||||
#include "libc_private.h"
|
#include "libc_private.h"
|
||||||
|
|
||||||
|
#undef putc
|
||||||
|
#undef putc_unlocked
|
||||||
|
|
||||||
int
|
int
|
||||||
putc(c, fp)
|
putc(c, fp)
|
||||||
int c;
|
int c;
|
||||||
|
@ -42,6 +42,9 @@ __FBSDID("$FreeBSD$");
|
|||||||
#include "local.h"
|
#include "local.h"
|
||||||
#include "libc_private.h"
|
#include "libc_private.h"
|
||||||
|
|
||||||
|
#undef putchar
|
||||||
|
#undef putchar_unlocked
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* A subroutine version of the macro putchar
|
* A subroutine version of the macro putchar
|
||||||
*/
|
*/
|
||||||
|
@ -47,7 +47,6 @@
|
|||||||
#include <string.h>
|
#include <string.h>
|
||||||
#include <wchar.h>
|
#include <wchar.h>
|
||||||
#include "un-namespace.h"
|
#include "un-namespace.h"
|
||||||
#include "local.h"
|
|
||||||
|
|
||||||
#include "printf.h"
|
#include "printf.h"
|
||||||
#include "fvwrite.h"
|
#include "fvwrite.h"
|
||||||
|
Loading…
Reference in New Issue
Block a user