1 /* $MirOS: src/lib/libc/stdio/wcio.h,v 1.2 2005/09/22 21:08:23 tg Exp $ */ 2 /* $OpenBSD: wcio.h,v 1.1 2005/06/17 20:40:32 espie Exp $ */ 3 /* $NetBSD: wcio.h,v 1.3 2003/01/18 11:30:00 thorpej Exp $ */ 4 5 /*- 6 * Copyright (c)2001 Citrus Project, 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $Citrus$ 31 */ 32 33 #ifndef _WCIO_H_ 34 #define _WCIO_H_ 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 WCIO_GET(fp) \ 50 (_EXT(fp) ? &(_EXT(fp)->_wcio) : (struct wchar_io_data *)0) 51 52 #define _SET_ORIENTATION(fp, mode) \ 53 do {\ 54 struct wchar_io_data *_wcio = WCIO_GET(fp); \ 55 if (_wcio && _wcio->wcio_mode == 0) \ 56 _wcio->wcio_mode = (mode);\ 57 } while (0) 58 59 /* 60 * WCIO_FREE should be called by fclose 61 */ 62 #define WCIO_FREE(fp) \ 63 do {\ 64 struct wchar_io_data *_wcio = WCIO_GET(fp); \ 65 if (_wcio) { \ 66 _wcio->wcio_mode = 0;\ 67 _wcio->wcio_ungetwc_inbuf = 0;\ 68 } \ 69 } while (0) 70 71 #define WCIO_FREEUB(fp) \ 72 do {\ 73 struct wchar_io_data *_wcio = WCIO_GET(fp); \ 74 if (_wcio) { \ 75 _wcio->wcio_ungetwc_inbuf = 0;\ 76 } \ 77 } while (0) 78 79 #define WCIO_INIT(fp) \ 80 do {\ 81 register struct wchar_io_data *_wcio = WCIO_GET(fp); \ 82 if (_wcio) \ 83 memset(_wcio, 0, sizeof(struct wchar_io_data)); \ 84 } while (0) 85 86 #endif /*_WCIO_H_*/ 87