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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*
     28  * This is the header where the internal to libc definition of the FILE
     29  * structure is defined. The exrernal defintion defines the FILE structure
     30  * as an array of longs. This prevents customers from writing code that
     31  * depends upon the implemnetation of stdio. The __fbufsize(3C) man page
     32  * documents a set of routines that customers can use so that they do not
     33  * need access to the FILE structure.
     34  *
     35  * When compiling libc this file MUST be included BEFORE <stdio.h>, and
     36  * any other headers that themselves directly or indirectly include
     37  * <stdio.h>. Failure to do so, will cause the compile of libc to fail,
     38  * since the structure members will not be visible to the stdio routines.
     39  */
     40 
     41 #ifndef	_FILE64_H
     42 #define	_FILE64_H
     43 
     44 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     45 
     46 #include <synch.h>
     47 #include <stdio_tag.h>
     48 #include <wchar_impl.h>
     49 
     50 #ifdef	__cplusplus
     51 extern "C" {
     52 #endif
     53 
     54 #ifndef	_MBSTATE_T
     55 #define	_MBSTATE_T
     56 typedef __mbstate_t	mbstate_t;
     57 #endif
     58 
     59 #define	rmutex_t	mutex_t
     60 
     61 #ifdef	_LP64
     62 
     63 struct __FILE_TAG {
     64 	unsigned char	*_ptr;	/* next character from/to here in buffer */
     65 	unsigned char	*_base;	/* the buffer */
     66 	unsigned char	*_end;	/* the end of the buffer */
     67 	ssize_t		_cnt;	/* number of available characters in buffer */
     68 	int		_file;	/* UNIX System file descriptor */
     69 	unsigned int	_flag;	/* the state of the stream */
     70 	rmutex_t	_lock;	/* lock for this structure */
     71 	mbstate_t	_state;	/* mbstate_t */
     72 	char		__fill[32];	/* filler to bring size to 128 bytes */
     73 };
     74 
     75 #else
     76 
     77 /*
     78  * Stuff missing from our 32-bit FILE struct.
     79  */
     80 struct xFILEdata {
     81 	uintptr_t	_magic;	/* Check: magic number, must be first */
     82 	unsigned char	*_end;	/* the end of the buffer */
     83 	rmutex_t	_lock;	/* lock for this structure */
     84 	mbstate_t	_state;	/* mbstate_t */
     85 	int		_altfd;	/* alternate fd if > 255 */
     86 };
     87 
     88 #define	XFILEINITIALIZER	{ 0, NULL, RECURSIVEMUTEX, DEFAULTMBSTATE }
     89 
     90 #endif	/*	_LP64	*/
     91 
     92 #ifdef	__cplusplus
     93 }
     94 #endif
     95 
     96 #endif	/* _FILE64_H */
     97