1 /* $NetBSD: wcio.h,v 1.2 2001/12/07 12:18:53 yamt Exp $ */ 2 3 /*- 4 * Copyright (c)2001 Citrus Project, 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $Citrus$ 29 */ 30 31 #ifndef _WCIO_H_ 32 #define _WCIO_H_ 33 34 #include <wchar.h> /* for mbstate_t and wchar_t */ 35 36 /* minimal requirement of SUSv2 */ 37 #define WCIO_UNGETWC_BUFSIZE 1 38 39 struct wchar_io_data { 40 mbstate_t wcio_mbstate_in; 41 mbstate_t wcio_mbstate_out; 42 43 wchar_t wcio_ungetwc_buf[WCIO_UNGETWC_BUFSIZE]; 44 size_t wcio_ungetwc_inbuf; 45 46 int wcio_mode; /* orientation */ 47 }; 48 49 #define _SET_ORIENTATION(fp, mode) \ 50 do {\ 51 struct wchar_io_data *_wcio = WCIO_GET(fp);\ 52 if (_wcio && _wcio->wcio_mode == 0)\ 53 _wcio->wcio_mode = (mode);\ 54 } while (/*CONSTCOND*/0) 55 56 /* 57 * WCIO_FREE should be called by fclose 58 */ 59 #define WCIO_GET(fp) (&(_EXT(fp)->_wcio)) 60 #define WCIO_FREE(fp) \ 61 do {\ 62 _EXT(fp)->_wcio.wcio_mode = 0;\ 63 WCIO_FREEUB(fp);\ 64 } while (/*CONSTCOND*/0) 65 #define WCIO_FREEUB(fp) \ 66 do {\ 67 _EXT(fp)->_wcio.wcio_ungetwc_inbuf = 0;\ 68 } while (/*CONSTCOND*/0) 69 70 #endif /*_WCIO_H_*/ 71