1 /* $NetBSD: fgetwln.c,v 1.2 2009/01/31 06:08:28 lukem Exp $ */ 2 /* $DragonFly: src/lib/libc/stdio/fgetwln.c,v 1.1 2005/07/25 00:37:41 joerg Exp $ */ 3 4 /*- 5 * Copyright (c) 2002-2004 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 30 #include "namespace.h" 31 #include <stdio.h> 32 #include <wchar.h> 33 #include "un-namespace.h" 34 35 #include "libc_private.h" 36 #include "local.h" 37 #include "priv_stdio.h" 38 39 wchar_t * 40 fgetwln(FILE * __restrict fp, size_t *lenp) 41 { 42 wint_t wc; 43 size_t len; 44 45 FLOCKFILE(fp); 46 _SET_ORIENTATION(fp, 1); 47 48 len = 0; 49 while ((wc = __fgetwc_unlock(fp)) != WEOF) { 50 #define GROW 512 51 if (len * sizeof(wchar_t) >= (size_t)fp->_lb._size && 52 __slbexpand(fp, (len + GROW) * sizeof(wchar_t))) 53 goto error; 54 *((wchar_t *)(void *)fp->_lb._base + len++) = wc; 55 if (wc == L'\n') 56 break; 57 } 58 if (len == 0) 59 goto error; 60 61 FUNLOCKFILE(fp); 62 *lenp = len; 63 return ((wchar_t *)(void *)fp->_lb._base); 64 65 error: 66 FUNLOCKFILE(fp); 67 *lenp = 0; 68 return (NULL); 69 } 70