snprintf/wcio.h

   1 /*      $OpenBSD: wcio.h,v 1.1 2005/06/17 20:40:32 espie Exp $  */
   2 /* $NetBSD: wcio.h,v 1.3 2003/01/18 11:30:00 thorpej 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 #ifndef _WCIO_H_
  33 #define _WCIO_H_
  34
  35 #include <stddef.h>
  36 #include <wchar.h>
  37
  38 /* minimal requirement of SUSv2 */
  39 #define WCIO_UNGETWC_BUFSIZE 1
  40
  41 struct wchar_io_data {
  42         mbstate_t wcio_mbstate_in;
  43         mbstate_t wcio_mbstate_out;
  44
  45         wchar_t wcio_ungetwc_buf[WCIO_UNGETWC_BUFSIZE];
  46         size_t wcio_ungetwc_inbuf;
  47
  48         int wcio_mode; /* orientation */
  49 };
  50
  51 #define WCIO_GET(fp) \
  52         (_EXT(fp) ? &(_EXT(fp)->_wcio) : (struct wchar_io_data *)0)
  53
  54 #define WCIO_GET_NONULL(fp) \
  55         (&(_EXT(fp)->_wcio))
  56
  57 #define _SET_ORIENTATION(fp, mode) \
  58 do {\
  59         struct wchar_io_data *_wcio = WCIO_GET(fp); \
  60         if (_wcio && _wcio->wcio_mode == 0) \
  61                 _wcio->wcio_mode = (mode);\
  62 } while (0)
  63
  64 /*
  65  * WCIO_FREE should be called by fclose
  66  */
  67 #define WCIO_FREE(fp) \
  68 do {\
  69         struct wchar_io_data *_wcio = WCIO_GET(fp); \
  70         if (_wcio) { \
  71                 _wcio->wcio_mode = 0;\
  72                 _wcio->wcio_ungetwc_inbuf = 0;\
  73         } \
  74 } while (0)
  75
  76 #define WCIO_FREEUB(fp) \
  77 do {\
  78         struct wchar_io_data *_wcio = WCIO_GET(fp); \
  79         if (_wcio) { \
  80                 _wcio->wcio_ungetwc_inbuf = 0;\
  81         } \
  82 } while (0)
  83
  84 #define WCIO_INIT(fp) \
  85         memset(WCIO_GET_NONULL(fp), 0, sizeof(struct wchar_io_data))
  86
  87 #endif /*_WCIO_H_*/