1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2002-2004 Tim J. Robbins. 5 * All rights reserved. 6 * 7 * Copyright (c) 2011 The FreeBSD Foundation 8 * 9 * Portions of this software were developed by David Chisnall 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "namespace.h" 38 #include <stdio.h> 39 #include <wchar.h> 40 #include "un-namespace.h" 41 #include "libc_private.h" 42 #include "local.h" 43 #include "xlocale_private.h" 44 45 wchar_t *fgetwln_l(FILE * __restrict, size_t *, locale_t); 46 47 wchar_t * 48 fgetwln_l(FILE * __restrict fp, size_t *lenp, locale_t locale) 49 { 50 wchar_t *ret; 51 wint_t wc; 52 size_t len; 53 int savserr; 54 55 FIX_LOCALE(locale); 56 57 FLOCKFILE_CANCELSAFE(fp); 58 ORIENT(fp, 1); 59 60 savserr = fp->_flags & __SERR; 61 fp->_flags &= ~__SERR; 62 63 len = 0; 64 while ((wc = __fgetwc(fp, locale)) != WEOF) { 65 #define GROW 512 66 if (len * sizeof(wchar_t) >= fp->_lb._size && 67 __slbexpand(fp, (len + GROW) * sizeof(wchar_t))) { 68 fp->_flags |= __SERR; 69 goto error; 70 } 71 *((wchar_t *)fp->_lb._base + len++) = wc; 72 if (wc == L'\n') 73 break; 74 } 75 /* fgetwc(3) may set both __SEOF and __SERR at once. */ 76 if (__sferror(fp)) 77 goto error; 78 79 fp->_flags |= savserr; 80 if (len == 0) 81 goto error; 82 83 *lenp = len; 84 ret = (wchar_t *)fp->_lb._base; 85 end: 86 FUNLOCKFILE_CANCELSAFE(); 87 return (ret); 88 89 error: 90 *lenp = 0; 91 ret = NULL; 92 goto end; 93 } 94 95 wchar_t * 96 fgetwln(FILE * __restrict fp, size_t *lenp) 97 { 98 return fgetwln_l(fp, lenp, __get_locale()); 99 } 100