1 /* $NetBSD: fwide.c,v 1.3 2005/06/12 05:21:27 lukem 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 #include "namespace.h" 32 #include <assert.h> 33 #include <stdio.h> 34 #include <wchar.h> 35 #include "un-namespace.h" 36 37 #include "libc_private.h" 38 #include "local.h" 39 40 int 41 fwide(FILE *fp, int mode) 42 { 43 struct wchar_io_data *wcio; 44 45 _DIAGASSERT(fp != NULL); 46 47 /* 48 * this implementation use only -1, 0, 1 49 * for mode value. 50 * (we don't need to do this, but 51 * this can make things simpler.) 52 */ 53 if (mode > 0) 54 mode = 1; 55 else if (mode < 0) 56 mode = -1; 57 58 FLOCKFILE(fp); 59 wcio = WCIO_GET(fp); 60 if (!wcio) 61 return 0; /* XXX */ 62 63 if (wcio->wcio_mode == 0 && mode != 0) 64 wcio->wcio_mode = mode; 65 else 66 mode = wcio->wcio_mode; 67 FUNLOCKFILE(fp); 68 69 return mode; 70 } 71