glibc/sysdeps/unix/dirstream.h

/* Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#ifndef	_DIRSTREAM_H

#define	_DIRSTREAM_H	1

#include <sys/types.h>

/* Directory stream type.

   The miscellaneous Unix `readdir' implementations read directory data
   into a buffer and return `struct dirent *' pointers into it.  */

struct __dirstream
  {
    int fd;			/* File descriptor.  */

    char *data;			/* Directory block.  */
    size_t allocation;		/* Space allocated for the block.  */
    size_t size;		/* Total valid data in the block.  */
    size_t offset;		/* Current offset into the block.  */

    off_t filepos;		/* Position of next entry to read.  */
  };

#define _DIR_dirfd(dirp)	((dirp)->fd)

#endif	/* dirstream.h */