1 /*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Copyright (c) 2011 The FreeBSD Foundation 6 * All rights reserved. 7 * Portions of this software were developed by David Chisnall 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: head/lib/libc/stdio/fgetwln.c 227753 2011-11-20 14:45:42Z theraven $ 32 */ 33 34 #include "namespace.h" 35 #include <stdio.h> 36 #include <wchar.h> 37 #include "un-namespace.h" 38 #include "libc_private.h" 39 #include "local.h" 40 #include "xlocale_private.h" 41 42 wchar_t *fgetwln_l(FILE * __restrict, size_t *, locale_t); 43 44 wchar_t * 45 fgetwln_l(FILE * __restrict fp, size_t *lenp, locale_t locale) 46 { 47 wint_t wc; 48 size_t len; 49 FIX_LOCALE(locale); 50 51 FLOCKFILE(fp); 52 ORIENT(fp, 1); 53 54 len = 0; 55 while ((wc = __fgetwc(fp, locale)) != WEOF) { 56 #define GROW 512 57 if (len * sizeof(wchar_t) >= fp->_lb._size && 58 __slbexpand(fp, (len + GROW) * sizeof(wchar_t))) 59 goto error; 60 *((wchar_t *)fp->_lb._base + len++) = wc; 61 if (wc == L'\n') 62 break; 63 } 64 if (len == 0) 65 goto error; 66 67 FUNLOCKFILE(fp); 68 *lenp = len; 69 return ((wchar_t *)fp->_lb._base); 70 71 error: 72 FUNLOCKFILE(fp); 73 *lenp = 0; 74 return (NULL); 75 } 76 wchar_t * 77 fgetwln(FILE * __restrict fp, size_t *lenp) 78 { 79 return fgetwln_l(fp, lenp, __get_locale()); 80 } 81