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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)