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 45wchar_t * 46fgetws(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 85error: 86 FUNLOCKFILE(fp); 87 return NULL; 88} 89