1 /* $NetBSD: fgetws.c,v 1.2 2006/07/03 17:06:36 tnozaki Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 Tim J. Robbins. 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 * Original version ID: 29 * FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.4 2002/09/20 13:25:40 tjr Exp 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 #if defined(LIB_SCCS) && !defined(lint) 35 __RCSID("$NetBSD: fgetws.c,v 1.2 2006/07/03 17:06:36 tnozaki Exp $"); 36 #endif 37 38 #include <assert.h> 39 #include <errno.h> 40 #include <stdio.h> 41 #include <wchar.h> 42 #include "reentrant.h" 43 #include "local.h" 44 45 wchar_t * 46 fgetws(ws, n, fp) 47 wchar_t * __restrict ws; 48 int n; 49 FILE * __restrict fp; 50 { 51 wchar_t *wsp; 52 wint_t wc; 53 54 _DIAGASSERT(fp != NULL); 55 _DIAGASSERT(ws != NULL); 56 57 FLOCKFILE(fp); 58 _SET_ORIENTATION(fp, 1); 59 60 if (n <= 0) { 61 errno = EINVAL; 62 goto error; 63 } 64 65 wsp = ws; 66 while (n-- > 1) { 67 wc = __fgetwc_unlock(fp); 68 if (__sferror(fp) != 0) 69 goto error; 70 if (__sfeof(fp) != 0) { 71 if (wsp == ws) { 72 /* EOF/error, no characters read yet. */ 73 goto error; 74 } 75 break; 76 } 77 *wsp++ = (wchar_t)wc; 78 if (wc == L'\n') { 79 break; 80 } 81 } 82 83 *wsp++ = L'\0'; 84 FUNLOCKFILE(fp); 85 86 return (ws); 87 88 error: 89 FUNLOCKFILE(fp); 90 return (NULL); 91 } 92