1 /* $OpenBSD: fwide.c,v 1.5 2015/08/31 02:53:57 guenther Exp $ */ 2 /* $NetBSD: fwide.c,v 1.2 2003/01/18 11:29:54 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 #include <stdio.h> 33 #include <wchar.h> 34 #include "local.h" 35 36 int 37 fwide(FILE *fp, int mode) 38 { 39 struct wchar_io_data *wcio; 40 41 /* 42 * this implementation use only -1, 0, 1 43 * for mode value. 44 * (we don't need to do this, but 45 * this can make things simpler.) 46 */ 47 if (mode > 0) 48 mode = 1; 49 else if (mode < 0) 50 mode = -1; 51 52 FLOCKFILE(fp); 53 wcio = WCIO_GET(fp); 54 if (!wcio) 55 return 0; /* XXX */ 56 57 if (wcio->wcio_mode == 0 && mode != 0) 58 wcio->wcio_mode = mode; 59 else 60 mode = wcio->wcio_mode; 61 FUNLOCKFILE(fp); 62 63 return mode; 64 } 65 DEF_STRONG(fwide); 66
