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/* Reentrant versions of lseek system call. */
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/* Reentrant versions of lseek system call. */
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#include
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#include
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#include
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#include
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#include <_syslist.h>
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#include <_syslist.h>
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#include
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/* Some targets provides their own versions of this functions.  Those
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/* Some targets provides their own versions of this functions.  Those
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   targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS.  */
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   targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS.  */
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#ifdef _REENT_ONLY
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#ifdef _REENT_ONLY
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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#define REENTRANT_SYSCALLS_PROVIDED
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#define REENTRANT_SYSCALLS_PROVIDED
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#endif
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#endif
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#endif
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#endif
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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#pragma pack(push, 1)
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/* We use the errno variable used by the system dependent layer.  */
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typedef struct
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{
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  char sec;
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  char min;
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  char hour;
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  char rsv;
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}detime_t;
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typedef struct
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{
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  char  day;
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  char  month;
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  short year;
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}dedate_t;
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typedef struct
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{
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  unsigned    attr;
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  unsigned    flags;
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  union
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  {
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     detime_t  ctime;
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     unsigned  cr_time;
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  };
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  union
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  {
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     dedate_t  cdate;
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     unsigned  cr_date;
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  };
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  union
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  {
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     detime_t  atime;
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     unsigned  acc_time;
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  };
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  union
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  {
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     dedate_t  adate;
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     unsigned  acc_date;
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  };
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  union
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  {
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     detime_t  mtime;
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     unsigned  mod_time;
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  };
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  union
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  {
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     dedate_t  mdate;
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     unsigned  mod_date;
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  };
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  unsigned    size;
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  unsigned    size_high;
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} FILEINFO;
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#pragma pack(pop)
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#undef errno
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extern unsigned  __NFiles;
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#define __handle_check( __h, __r )                \
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        if( (__h) < 0  ||  (__h) > __NFiles ) {   \
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           ptr->_errno =  EBADF ;                 \
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           return( __r );                         \
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        }
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extern int errno;
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/*
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/*
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FUNCTION
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FUNCTION
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	<<_lseek_r>>---Reentrant version of lseek
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	<<_lseek_r>>---Reentrant version of lseek
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INDEX
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INDEX
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	_lseek_r
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	_lseek_r
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ANSI_SYNOPSIS
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ANSI_SYNOPSIS
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	#include
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	#include
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	off_t _lseek_r(struct _reent *<[ptr]>,
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	off_t _lseek_r(struct _reent *<[ptr]>,
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		       int <[fd]>, off_t <[pos]>, int <[whence]>);
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		       int <[fd]>, off_t <[pos]>, int <[whence]>);
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TRAD_SYNOPSIS
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TRAD_SYNOPSIS
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	#include
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	#include
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	off_t _lseek_r(<[ptr]>, <[fd]>, <[pos]>, <[whence]>)
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	off_t _lseek_r(<[ptr]>, <[fd]>, <[pos]>, <[whence]>)
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	struct _reent *<[ptr]>;
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	struct _reent *<[ptr]>;
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	int <[fd]>;
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	int <[fd]>;
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	off_t <[pos]>;
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	off_t <[pos]>;
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	int <[whence]>;
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	int <[whence]>;
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DESCRIPTION
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DESCRIPTION
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	This is a reentrant version of <>.  It
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	This is a reentrant version of <>.  It
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	takes a pointer to the global data block, which holds
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	takes a pointer to the global data block, which holds
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	<>.
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	<>.
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*/
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*/
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_off_t
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_off_t
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_DEFUN (_lseek_r, (ptr, fd, pos, whence),
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_DEFUN (_lseek_r, (ptr, fd, pos, whence),
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     struct _reent *ptr _AND
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     struct _reent *ptr _AND
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     int fd _AND
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     int fd _AND
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     _off_t pos _AND
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     _off_t pos _AND
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     int whence)
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     int whence)
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{
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{
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    _off_t ret;
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  _off_t ret;
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    __file_handle *fh;
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    __handle_check( fd, -1 );
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    fh = (__file_handle*) __getOSHandle( fd );
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    switch(whence)
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    {
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        case SEEK_SET:
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            ret = pos;
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            break;
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        case SEEK_CUR:
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            ret = fh->offset + pos;
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            break;
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        case SEEK_END:
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        {
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            FILEINFO info;
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  errno = 0;
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            get_fileinfo(fh->name, &info);
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  if ((ret = _lseek (fd, pos, whence)) == (_off_t) -1 && errno != 0)
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            ret = pos + info.size;
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    ptr->_errno = errno;
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            break;
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  return ret;
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        }
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        default:
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            ptr->_errno = EINVAL;
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            return -1;
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    };
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    fh->offset = ret;
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    return( ret );
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}
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_off_t
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_DEFUN (lseek, (fd, pos, whence),
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     int fd _AND
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     _off_t pos _AND
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153 
     int whence)
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154 
 
 - 
 
155 
{
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156 
    return _lseek_r(_REENT, fd, pos, whence);
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};
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}
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#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
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#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */