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/*

 * Copyright (c) 1990 The Regents of the University of California.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms are permitted

 * provided that the above copyright notice and this paragraph are

 * duplicated in all such forms and that any documentation,

 * advertising materials, and other materials related to such

 * distribution and use acknowledge that the software was developed

 * by the University of California, Berkeley.  The name of the

 * University may not be used to endorse or promote products derived

 * from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 */

/*

FUNCTION

<>, <>---set file position

INDEX

	fseek

INDEX

	fseeko

INDEX

	_fseek_r

INDEX

	_fseeko_r

ANSI_SYNOPSIS

	#include 

	int fseek(FILE *<[fp]>, long <[offset]>, int <[whence]>);

	int fseeko(FILE *<[fp]>, off_t <[offset]>, int <[whence]>);

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

	             long <[offset]>, int <[whence]>);

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

	             off_t <[offset]>, int <[whence]>);

TRAD_SYNOPSIS

	#include 

	int fseek(<[fp]>, <[offset]>, <[whence]>);

	FILE *<[fp]>;

	long <[offset]>;

	int <[whence]>;

	int fseeko(<[fp]>, <[offset]>, <[whence]>);

	FILE *<[fp]>;

	off_t <[offset]>;

	int <[whence]>;

	int _fseek_r(<[ptr]>, <[fp]>, <[offset]>, <[whence]>);

	struct _reent *<[ptr]>;

	FILE *<[fp]>;

	long <[offset]>;

	int <[whence]>;

	int _fseeko_r(<[ptr]>, <[fp]>, <[offset]>, <[whence]>);

	struct _reent *<[ptr]>;

	FILE *<[fp]>;

	off_t <[offset]>;

	int <[whence]>;

DESCRIPTION

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

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

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

You can use <>/<> to set the position for the file identified by

<[fp]>.  The value of <[offset]> determines the new position, in one

of three ways selected by the value of <[whence]> (defined as macros

in `<>'):

<>---<[offset]> is the absolute file position (an offset

from the beginning of the file) desired.  <[offset]> must be positive.

<>---<[offset]> is relative to the current file position.

<[offset]> can meaningfully be either positive or negative.

<>---<[offset]> is relative to the current end of file.

<[offset]> can meaningfully be either positive (to increase the size

of the file) or negative.

See <>/<> to determine the current file position.

RETURNS

<>/<> return <<0>> when successful.  On failure, the

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

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

repositioning) or <> (invalid file position).

PORTABILITY

ANSI C requires <>.

<> is defined by the Single Unix specification.

Supporting OS subroutines required: <>, <>, <>,

<>, <>, <>, <>.

*/

#include <_ansi.h>

#include 

#include 

#include 

#include "local.h"

int

_DEFUN(_fseek_r, (ptr, fp, offset, whence),

       struct _reent *ptr _AND

       register FILE *fp  _AND

       long offset        _AND

       int whence)

{

  return _fseeko_r (ptr, fp, offset, whence);

}

#ifndef _REENT_ONLY

int

_DEFUN(fseek, (fp, offset, whence),

       register FILE *fp _AND

       long offset       _AND

       int whence)

{

  return _fseek_r (_REENT, fp, offset, whence);

}

#endif /* !_REENT_ONLY */