1 /* $NetBSD: fgetws.c,v 1.2 2006/07/03 17:06:36 tnozaki Exp $ */ 2 /* $DragonFly: src/lib/libc/stdio/fgetws.c,v 1.1 2005/07/25 00:37:41 joerg Exp $ */ 3 4 /*- 5 * Copyright (c) 2002 Tim J. Robbins. 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 * Original version ID: 30 * FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.4 2002/09/20 13:25:40 tjr Exp 31 * 32 */ 33 34 #include "namespace.h" 35 #include <assert.h> 36 #include <errno.h> 37 #include <stdio.h> 38 #include <wchar.h> 39 #include "un-namespace.h" 40 41 #include "libc_private.h" 42 #include "local.h" 43 #include "priv_stdio.h" 44 45 wchar_t * 46 fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp) 47 { 48 wchar_t *wsp; 49 wint_t wc; 50 51 _DIAGASSERT(fp != NULL); 52 _DIAGASSERT(ws != NULL); 53 54 FLOCKFILE(fp); 55 _SET_ORIENTATION(fp, 1); 56 57 if (n <= 0) { 58 errno = EINVAL; 59 goto error; 60 } 61 62 wsp = ws; 63 while (n-- > 1) { 64 wc = __fgetwc_unlock(fp); 65 if (__sferror(fp) != 0) 66 goto error; 67 if (__sfeof(fp) != 0) { 68 if (wsp == ws) { 69 /* EOF/error, no characters read yet. */ 70 goto error; 71 } 72 break; 73 } 74 *wsp++ = (wchar_t)wc; 75 if (wc == L'\n') { 76 break; 77 } 78 } 79 80 *wsp++ = L'\0'; 81 FUNLOCKFILE(fp); 82 83 return (ws); 84 85 error: 86 FUNLOCKFILE(fp); 87 return (NULL); 88 } 89