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/* This header file provides the reentrancy.  */

/* WARNING: All identifiers here must begin with an underscore.  This file is

   included by stdio.h and others and we therefore must only use identifiers

   in the namespace allotted to us.  */

#ifndef _SYS_REENT_H_

#ifdef __cplusplus

extern "C" {

#endif

#define _SYS_REENT_H_

#include <_ansi.h>

struct _glue

{

  struct _glue *_next;

  int _niobs;

  struct __sFILE *_iobs;

};

struct _Bigint

{

  struct _Bigint *_next;

  int _k, _maxwds, _sign, _wds;

  unsigned long _x[1];

};

/*

 * atexit() support

 */

#define _ATEXIT_SIZE 32 /* must be at least 32 to guarantee ANSI conformance */

struct _atexit {

        struct  _atexit *_next;                 /* next in list */

        int     _ind;                           /* next index in this table */

        void    (*_fns[_ATEXIT_SIZE])();        /* the table itself */

};

/*

 * Stdio buffers.

 *

 * This and __sFILE are defined here because we need them for struct _reent,

 * but we don't want stdio.h included when stdlib.h is.

 */

struct __sbuf {

        unsigned char *_base;

        int     _size;

};

/*

 * We need fpos_t for the following, but it doesn't have a leading "_",

 * so we use _fpos_t instead.

 */

typedef long _fpos_t;           /* XXX must match off_t in <sys/types.h> */

                                /* (and must be `long' for now) */

/*

 * 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.

 */

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 */

  _PTR  _cookie;        /* cookie passed to io functions */

  int   _EXFUN((*_read),(_PTR _cookie, char *_buf, int _n));

  int   _EXFUN((*_write),(_PTR _cookie, const char *_buf, int _n));

  _fpos_t _EXFUN((*_seek),(_PTR _cookie, _fpos_t _offset, int _whence));

  int   _EXFUN((*_close),(_PTR _cookie));

  /* 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 fgetline() when line crosses buffer boundary */

  struct __sbuf _lb;    /* buffer for fgetline() */

  /* Unix stdio files get aligned to block boundaries on fseek() */

  int   _blksize;       /* stat.st_blksize (may be != _bf._size) */

  int   _offset;        /* current lseek offset */

  struct _reent *_data;

};

/*

 * struct _reent

 *

 * This structure contains *all* globals needed by the library.

 * It's raison d'etre is to facilitate threads by making all library routines

 * reentrant.  IE: All state information is contained here.

 */

struct _reent

{

  /* local copy of errno */

  int _errno;

  /* FILE is a big struct and may change over time.  To try to achieve binary

     compatibility with future versions, put stdin,stdout,stderr here.

     These are pointers into member __sf defined below.  */

  struct __sFILE *_stdin, *_stdout, *_stderr;

  int  _inc;                    /* used by tmpnam */

  char _emergency[25];

  int _current_category;        /* used by setlocale */

  _CONST char *_current_locale;

  int __sdidinit;               /* 1 means stdio has been init'd */

  void _EXFUN((*__cleanup),(struct _reent *));

  /* used by mprec routines */

  struct _Bigint *_result;

  int _result_k;

  struct _Bigint *_p5s;

  struct _Bigint **_freelist;

  /* used by some fp conversion routines */

  int _cvtlen;                  /* should be size_t */

  char *_cvtbuf;

  /* Two next two fields were once used by malloc.  They are no longer

     used.  I'm leaving them here for now in case there really is a

     binary compatibility issue.  */

#define _N_LISTS 30

  unsigned char * _nextf[_N_LISTS];

  unsigned int _nmalloc[_N_LISTS];

  /* atexit stuff */

  struct _atexit *_atexit;      /* points to head of LIFO stack */

  struct _atexit _atexit0;      /* one guaranteed table, required by ANSI */

  /* signal info */

  void (**(_sig_func))();

  /* These are here last so that __sFILE can grow without changing the offsets

     of the above members (on the off chance that future binary compatibility

     would be broken otherwise).  */

  struct _glue __sglue;                 /* root of glue chain */

  struct __sFILE __sf[3];               /* first three file descriptors */

};

#define _REENT_INIT(var) \

  { 0, &var.__sf[0], &var.__sf[1], &var.__sf[2], 0, "", 0, "C" }

/*

 * All references to struct _reent are via this pointer.

 * Internally, newlib routines that need to reference it should use _REENT.

 */

#ifndef __ATTRIBUTE_IMPURE_PTR__

#define __ATTRIBUTE_IMPURE_PTR__

#endif

extern struct _reent *_impure_ptr __ATTRIBUTE_IMPURE_PTR__;

void _reclaim_reent _PARAMS ((struct _reent *));

/* #define _REENT_ONLY define this to get only reentrant routines */

#ifndef _REENT_ONLY

#define _REENT _impure_ptr

#endif

#ifdef __cplusplus

}

#endif

#endif /* _SYS_REENT_H_ */