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 #include "namespace.h" 36 #include <stdio.h> 37 #include <wchar.h> 38 #include "un-namespace.h" 39 #include "libc_private.h" 40 #include "local.h" 41 #include "xlocale_private.h" 42 43 wchar_t *fgetwln_l(FILE * __restrict, size_t *, locale_t); 44 45 wchar_t * 46 fgetwln_l(FILE * __restrict fp, size_t *lenp, locale_t locale) 47 { 48 wchar_t *ret; 49 wint_t wc; 50 size_t len; 51 int savserr; 52 53 FIX_LOCALE(locale); 54 55 FLOCKFILE_CANCELSAFE(fp); 56 ORIENT(fp, 1); 57 58 savserr = fp->_flags & __SERR; 59 fp->_flags &= ~__SERR; 60 61 len = 0; 62 while ((wc = __fgetwc(fp, locale)) != WEOF) { 63 #define GROW 512 64 if (len * sizeof(wchar_t) >= fp->_lb._size && 65 __slbexpand(fp, (len + GROW) * sizeof(wchar_t))) { 66 fp->_flags |= __SERR; 67 goto error; 68 } 69 *((wchar_t *)fp->_lb._base + len++) = wc; 70 if (wc == L'\n') 71 break; 72 } 73 /* fgetwc(3) may set both __SEOF and __SERR at once. */ 74 if (__sferror(fp)) 75 goto error; 76 77 fp->_flags |= savserr; 78 if (len == 0) 79 goto error; 80 81 *lenp = len; 82 ret = (wchar_t *)fp->_lb._base; 83 end: 84 FUNLOCKFILE_CANCELSAFE(); 85 return (ret); 86 87 error: 88 *lenp = 0; 89 ret = NULL; 90 goto end; 91 } 92 93 wchar_t * 94 fgetwln(FILE * __restrict fp, size_t *lenp) 95 { 96 return fgetwln_l(fp, lenp, __get_locale()); 97 } 98