Cider Isn't Darwin Emulation, Really
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/* * Common header for stdio.h and xlocale/_stdio.h */
#ifndef __STDIO_H_#define __STDIO_H_
#include <sys/cdefs.h>#include <Availability.h>
#include <_types.h>
/* DO NOT REMOVE THIS COMMENT: fixincludes needs to see: * __gnuc_va_list and include <stdarg.h> */#include <sys/_types/_va_list.h>#include <sys/_types/_size_t.h>#include <sys/_types/_null.h>
#ifndef UNIFDEF_DRIVERKIT#include <sys/stdio.h>
typedef __darwin_off_t fpos_t;
#define _FSTDIO /* Define for new stdio with functions. */
/* * 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;};
/* hold a buncha junk that would grow the ABI */struct __sFILEX;
/* * 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. * * NB: see WARNING above before changing the layout of this structure! */typedef 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 (* _Nullable _close)(void *); int (* _Nullable _read) (void *, char *, int); fpos_t (* _Nullable _seek) (void *, fpos_t, int); int (* _Nullable _write)(void *, const char *, int);
/* separate buffer for long sequences of ungetc() */ struct __sbuf _ub; /* ungetc buffer */ struct __sFILEX *_extra; /* additions to FILE to not break ABI */ 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 (see WARNING) */} FILE;#endif /* UNIFDEF_DRIVERKIT */
#endif /* __STDIO_H_ */