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/*

FUNCTION

<<fgetpos>>---record position in a stream or file

INDEX

        fgetpos

ANSI_SYNOPSIS

        #include <stdio.h>

        int fgetpos(FILE *<[fp]>, fpos_t *<[pos]>);

TRAD_SYNOPSIS

        #include <stdio.h>

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

        FILE *<[fp]>;

        fpos_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 <<fgetpos>> to report on the current position for a file

identified by <[fp]>; <<fgetpos>> will write a value

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

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

position.

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

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

would be returned by <<ftell>>.

RETURNS

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

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

positioning; the global <<errno>> indicates this condition with the

value <<ESPIPE>>.

PORTABILITY

<<fgetpos>> is required by the ANSI C standard, but the meaning of the

value it records is not specified beyond requiring that it be

acceptable as an argument to <<fsetpos>>.  In particular, other

conforming C implementations may return a different result from

<<ftell>> than what <<fgetpos>> writes at <<*<[pos]>>>.

No supporting OS subroutines are required.

*/

#include <stdio.h>

int

_DEFUN (fgetpos, (fp, pos),

        FILE * fp _AND

        fpos_t * pos)

{

  *pos = ftell (fp);

  if (*pos != -1)

    return 0;

  return 1;

}