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 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 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 wint_t wc; 49 size_t len; 50 int savserr; 51 52 FIX_LOCALE(locale); 53 54 FLOCKFILE(fp); 55 ORIENT(fp, 1); 56 57 savserr = fp->_flags & __SERR; 58 fp->_flags &= ~__SERR; 59 60 len = 0; 61 while ((wc = __fgetwc(fp, locale)) != WEOF) { 62 #define GROW 512 63 if (len * sizeof(wchar_t) >= fp->_lb._size && 64 __slbexpand(fp, (len + GROW) * sizeof(wchar_t))) { 65 fp->_flags |= __SERR; 66 goto error; 67 } 68 *((wchar_t *)fp->_lb._base + len++) = wc; 69 if (wc == L'\n') 70 break; 71 } 72 /* fgetwc(3) may set both __SEOF and __SERR at once. */ 73 if (__sferror(fp)) 74 goto error; 75 76 fp->_flags |= savserr; 77 if (len == 0) 78 goto error; 79 80 FUNLOCKFILE(fp); 81 *lenp = len; 82 return ((wchar_t *)fp->_lb._base); 83 84 error: 85 FUNLOCKFILE(fp); 86 *lenp = 0; 87 return (NULL); 88 } 89 90 wchar_t * 91 fgetwln(FILE * __restrict fp, size_t *lenp) 92 { 93 return fgetwln_l(fp, lenp, __get_locale()); 94 } 95