path: root/stdio/stdio.h

/* Copyright (C) 1991,92,93,94,95,96,97,98 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/*
 *	ISO C Standard: 4.9 INPUT/OUTPUT	<stdio.h>
 */

#ifndef	_STDIO_H

#if	!defined(__need_FILE)
#define	_STDIO_H	1
#include <features.h>

__BEGIN_DECLS

#define	__need_size_t
#define	__need_NULL
#include <stddef.h>

#define	__need___va_list
#include <stdarg.h>
#ifndef	__GNUC_VA_LIST
#define	__gnuc_va_list	__ptr_t
#endif

#include <bits/types.h>
#endif /* Don't need FILE.  */
#undef	__need_FILE


#ifndef	__FILE_defined

/* The opaque type of streams.  */
typedef struct __stdio_file FILE;

#define	__FILE_defined	1
#endif /* FILE not defined.  */


#ifdef	_STDIO_H

/* The type of the second argument to `fgetpos' and `fsetpos'.  */
typedef __off_t fpos_t;

/* The mode of I/O, as given in the MODE argument to fopen, etc.  */
typedef struct
{
  unsigned int __read:1;	/* Open for reading.  */
  unsigned int __write:1;	/* Open for writing.  */
  unsigned int __append:1;	/* Open for appending.  */
  unsigned int __binary:1;	/* Opened binary.  */
  unsigned int __create:1;	/* Create the file.  */
  unsigned int __exclusive:1;	/* Error if it already exists.  */
  unsigned int __truncate:1;	/* Truncate the file on opening.  */
} __io_mode;


/* Functions to do I/O and file management for a stream.  */

/* Read NBYTES bytes from COOKIE into a buffer pointed to by BUF.
   Return number of bytes read.  */
typedef __ssize_t __io_read_fn __P ((__ptr_t __cookie, char *__buf,
				     size_t __nbytes));

/* Write N bytes pointed to by BUF to COOKIE.  Write all N bytes
   unless there is an error.  Return number of bytes written, or -1 if
   there is an error without writing anything.  If the file has been
   opened for append (__mode.__append set), then set the file pointer
   to the end of the file and then do the write; if not, just write at
   the current file pointer.  */
typedef __ssize_t __io_write_fn __P ((__ptr_t __cookie, __const char *__buf,
				      size_t __n));

/* Move COOKIE's file position to *POS bytes from the
   beginning of the file (if W is SEEK_SET),
   the current position (if W is SEEK_CUR),
   or the end of the file (if W is SEEK_END).
   Set *POS to the new file position.
   Returns zero if successful, nonzero if not.  */
typedef int __io_seek_fn __P ((__ptr_t __cookie, fpos_t