diff options
Diffstat (limited to 'lib/libc/stdio/local.h')
| -rw-r--r-- | lib/libc/stdio/local.h | 134 |
1 files changed, 2 insertions, 132 deletions
diff --git a/lib/libc/stdio/local.h b/lib/libc/stdio/local.h index d5bf737..09b3a18 100644 --- a/lib/libc/stdio/local.h +++ b/lib/libc/stdio/local.h @@ -39,105 +39,9 @@ #include <wchar.h> /* - * Information local to this implementation of stdio, in particular, - * macros, private functions, private variables, and the definition of - * FILE. - * - * NB: to fit things in six character monocase externals, the stdio - * code uses the prefix `__s' for stdio objects, typically followed - * by a three-character attempt at a mnemonic. - */ - -/* stdio buffers */ -struct __sbuf { - unsigned char *_base; - int _size; -}; - -/* - * stdio state variables. - * - * The following always hold: - * - * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), - * _lbfsize is -_bf._size, else _lbfsize is 0 - * if _flags&__SRD, _w is 0 - * if _flags&__SWR, _r is 0 - * - * This ensures that the getc and putc macros (or inline functions) never - * try to write or read from a file that is in `read' or `write' mode. - * (Moreover, they can, and do, automatically switch from read mode to - * write mode, and back, on "r+" and "w+" files.) - * - * _lbfsize is used only to make the inline line-buffered output stream - * code as compact as possible. - * - * _ub, _up, and _ur are used when ungetc() pushes back more characters - * than fit in the current _bf, or when ungetc() pushes back a character - * that does not match the previous one in _bf. When this happens, - * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff - * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. - * - * Certain members of __sFILE are accessed directly via macros or - * inline functions. To preserve ABI compat, these members must not - * be disturbed. These members are marked below with (*). + * Information local to this implementation of stdio, + * in particular, macros and private variables. */ -struct __sFILE { - unsigned char *_p; /* (*) current position in (some) buffer */ - int _r; /* (*) read space left for getc() */ - int _w; /* (*) write space left for putc() */ - short _flags; /* (*) flags, below; this FILE is free if 0 */ - short _file; /* (*) fileno, if Unix descriptor, else -1 */ - struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ - 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 _swrite(FILE *, char const *, int); @@ -153,8 +57,6 @@ extern FILE *__sfp(void); extern int __slbexpand(FILE *, size_t); extern int __srefill(FILE *); extern int __sread(void *, char *, int); -extern int __srget(FILE *); -extern int __swbuf(int, FILE *); extern int __swrite(void *, char const *, int); extern fpos_t __sseek(void *, fpos_t, int); extern int __sclose(void *); @@ -179,38 +81,6 @@ 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 * can be written now. Otherwise, return EOF and set errno. */ |
