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1 /*	$OpenBSD: fileext.h,v 1.2 2005/06/17 20:40:32 espie Exp $	*/
2 /* $NetBSD: fileext.h,v 1.5 2003/07/18 21:46:41 nathanw Exp $ */
3 
4 /*-
5  * Copyright (c)2001 Citrus Project,
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $Citrus$
30  */
31 
32 /*
33  * file extension
34  */
35 struct __sfileext {
36 	struct	__sbuf _ub; /* ungetc buffer */
37 	struct wchar_io_data _wcio;	/* wide char io status */
38 };
39 
40 #define _EXT(fp) ((struct __sfileext *)((fp)->_ext._base))
41 #define _UB(fp) _EXT(fp)->_ub
42 
43 #define _FILEEXT_INIT(fp) \
44 do { \
45 	_UB(fp)._base = NULL; \
46 	_UB(fp)._size = 0; \
47 	WCIO_INIT(fp); \
48 } while (0)
49 
50 #define _FILEEXT_SETUP(f, fext) \
51 do { \
52 	(f)->_ext._base = (unsigned char *)(fext); \
53 	_FILEEXT_INIT(f); \
54 } while (0)
55