1 /* $OpenBSD: fgetws.c,v 1.2 2005/08/08 08:05:36 espie Exp $ */ 2 /* $NetBSD: fgetws.c,v 1.1 2003/03/07 07:11:37 tshiozak 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 <errno.h> 35 #include <stdio.h> 36 #include <wchar.h> 37 #include "local.h" 38 39 wchar_t * 40 fgetws(ws, n, fp) 41 wchar_t * __restrict ws; 42 int n; 43 FILE * __restrict fp; 44 { 45 wchar_t *wsp; 46 wint_t wc; 47 48 flockfile(fp); 49 _SET_ORIENTATION(fp, 1); 50 51 if (n <= 0) { 52 errno = EINVAL; 53 goto error; 54 } 55 56 wsp = ws; 57 while (n-- > 1) { 58 if ((wc = __fgetwc_unlock(fp)) == WEOF && errno == EILSEQ) { 59 goto error; 60 } 61 if (wc == WEOF) { 62 if (wsp == ws) { 63 /* EOF/error, no characters read yet. */ 64 goto error; 65 } 66 break; 67 } 68 *wsp++ = (wchar_t)wc; 69 if (wc == L'\n') { 70 break; 71 } 72 } 73 74 *wsp++ = L'\0'; 75 funlockfile(fp); 76 77 return (ws); 78 79 error: 80 funlockfile(fp); 81 return (NULL); 82 } 83