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/*

FUNCTION

<<fsetpos64>>---restore position of a large stream or file

INDEX

        fsetpos64

INDEX

        _fsetpos64_r

ANSI_SYNOPSIS

        #include <stdio.h>

        int fsetpos64(FILE *<[fp]>, const _fpos64_t *<[pos]>);

        int _fsetpos64_r(struct _reent *<[ptr]>, FILE *<[fp]>,

                         const _fpos64_t *<[pos]>);

TRAD_SYNOPSIS

        #include <stdio.h>

        int fsetpos64(<[fp]>, <[pos]>)

        FILE *<[fp]>;

        _fpos64_t *<[pos]>;

        int _fsetpos64_r(<[ptr]>, <[fp]>, <[pos]>)

        struct _reent *<[ptr]>;

        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 <<fsetpos64>> to return the large file identified by <[fp]> to a

previous position <<*<[pos]>>> (after first recording it with <<fgetpos64>>).

See <<fseeko64>> for a similar facility.

RETURNS

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

result is <<1>>.  The reason for failure is indicated in <<errno>>:

either <<ESPIPE>> (the stream identified by <[fp]> doesn't support

64-bit repositioning) or <<EINVAL>> (invalid file position).

PORTABILITY

<<fsetpos64>> is a glibc extension.

Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,

<<lseek64>>, <<read>>, <<sbrk>>, <<write>>.

*/

#include <stdio.h>

#ifdef __LARGE64_FILES

int

_DEFUN (_fsetpos64_r, (ptr, iop, pos),

        struct _reent *ptr _AND

        FILE * iop _AND

        _CONST _fpos64_t * pos)

{

  int x = _fseeko64_r (ptr, iop, (_off64_t)(*pos), SEEK_SET);

  if (x != 0)

    return 1;

  return 0;

}

#ifndef _REENT_ONLY

int

_DEFUN (fsetpos64, (iop, pos),

        FILE * iop _AND

        _CONST _fpos64_t * pos)

{

  return _fsetpos64_r (_REENT, iop, pos);

}

#endif /* !_REENT_ONLY */

#endif /* __LARGE64_FILES */