/*FUNCTION	<<reent>>---definition of impure data.	INDEX	reentDESCRIPTION	This module defines the impure data area used by the	non-reentrant functions, such as strtok.*/#include <stdlib.h>#include <reent.h>#ifdef _REENT_ONLY#ifndef REENTRANT_SYSCALLS_PROVIDED#define REENTRANT_SYSCALLS_PROVIDED#endif#endif#ifndef REENTRANT_SYSCALLS_PROVIDED/* We use the errno variable used by the system dependent layer.  */#undef errnoint errno;#endif/* Interim cleanup code */voidcleanup_glue (ptr, glue)     struct _reent *ptr;     struct _glue *glue;{  /* Have to reclaim these in reverse order: */  if (glue->_next)    cleanup_glue (ptr, glue->_next);  _free_r (ptr, glue);}void_reclaim_reent (ptr)     struct _reent *ptr;{  if (ptr != _impure_ptr)    {      /* used by mprec routines. */#ifdef _REENT_SMALL      if (ptr->_mp)	/* don't bother allocating it! */#endif      if (_REENT_MP_FREELIST(ptr))	{	  int i;	  for (i = 0; i < 15 /* _Kmax */; i++) 	    {	      struct _Bigint *thisone, *nextone;		      nextone = _REENT_MP_FREELIST(ptr)[i];	      while (nextone)		{		  thisone = nextone;		  nextone = nextone->_next;		  _free_r (ptr, thisone);		}	    }    	  _free_r (ptr, _REENT_MP_FREELIST(ptr));	}#ifdef _REENT_SMALL      if (ptr->_emergency)	_free_r (ptr, ptr->_emergency);      if (ptr->_mp)	_free_r (ptr, ptr->_mp);      if (ptr->_r48)	_free_r (ptr, ptr->_r48);      if (ptr->_localtime_buf)	_free_r (ptr, ptr->_localtime_buf);      if (ptr->_asctime_buf)	_free_r (ptr, ptr->_asctime_buf);#else      /* atexit stuff */      if ((ptr->_atexit) && (ptr->_atexit != &ptr->_atexit0))	{	  struct _atexit *p, *q;	  for (p = ptr->_atexit; p != &ptr->_atexit0;)	    {	      q = p;	      p = p->_next;	      _free_r (ptr, q);	    }	}#endif      if (ptr->_cvtbuf)	_free_r (ptr, ptr->_cvtbuf);      if (ptr->__sdidinit)	{	  /* cleanup won't reclaim memory 'coz usually it's run	     before the program exits, and who wants to wait for that? */	  ptr->__cleanup (ptr);	  if (ptr->__sglue._next)	    cleanup_glue (ptr, ptr->__sglue._next);	}      /* Malloc memory not reclaimed; no good way to return memory anyway. */    }}/* *  Do atexit() processing and cleanup * *  NOTE:  This is to be executed at task exit.  It does not tear anything *         down which is used on a global basis. */void_wrapup_reent(struct _reent *ptr){  register struct _atexit *p;  register int n;  if (ptr == 0)      ptr = _REENT;#ifdef _REENT_SMALL  for (p = &ptr->_atexit, n = p->_ind; --n >= 0;)    (*p->_fns[n]) ();#else  for (p = ptr->_atexit; p; p = p->_next)    for (n = p->_ind; --n >= 0;)      (*p->_fns[n]) ();#endif  if (ptr->__cleanup)    (*ptr->__cleanup) (ptr);}