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/*

FUNCTION

<<fgetpos64>>---record position in a large stream or file

INDEX

        fgetpos64

INDEX

        _fgetpos64_r

ANSI_SYNOPSIS

        #include <stdio.h>

        int fgetpos64(FILE *<[fp]>, _fpos64_t *<[pos]>);

        int _fgetpos64_r(struct _reent *<[ptr]>, FILE *<[fp]>,

                         _fpos64_t *<[pos]>);

TRAD_SYNOPSIS

        #include <stdio.h>

        int fgetpos64(<[fp]>, <[pos]>)

        FILE *<[fp]>;

        _fpos64_t *<[pos]>;

        int _fgetpos64_r(<[ptr]>, <[fp]>, <[pos]>)

        FILE *<[fp]>;

        _fpos64_t *<[pos]>;

DESCRIPTION

Objects of type <<FILE>> can have a ``position'' that records how much

of the file your program has already read.  Many of the <<stdio>> functions

depend on this position, and many change it as a side effect.

You can use <<fgetpos64>> to report on the current position for a file

identified by <[fp]> that was opened by <<fopen64>>; <<fgetpos>> will write

a value representing that position at <<*<[pos]>>>.  Later, you can

use this value with <<fsetpos64>> to return the file to this

position.

In the current implementation, <<fgetpos64>> simply uses a character

count to represent the file position; this is the same number that

would be returned by <<ftello64>>.

RETURNS

<<fgetpos64>> returns <<0>> when successful.  If <<fgetpos64>> fails, the

result is <<1>>.  Failure occurs on streams that do not support

positioning or streams not opened via <<fopen64>>; the global <<errno>>

indicates these conditions with the value <<ESPIPE>>.

PORTABILITY

<<fgetpos64>> is a glibc extension.

No supporting OS subroutines are required.

*/

#include <stdio.h>

#ifdef __LARGE64_FILES

int

_DEFUN (_fgetpos64_r, (ptr, fp, pos),

        struct _reent * ptr _AND

        FILE * fp _AND

        _fpos64_t * pos)

{

  *pos = (_fpos64_t)_ftello64_r (ptr, fp);

  if (*pos != -1)

    {

      return 0;

    }

  return 1;

}

#ifndef _REENT_ONLY

int

_DEFUN (fgetpos64, (fp, pos),

        FILE * fp _AND

        _fpos64_t * pos)

{

  return _fgetpos64_r (_REENT, fp, pos);

}

#endif /* !_REENT_ONLY */

#endif /* __LARGE64_FILES */