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 <errno.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <wchar.h> 40 #include "un-namespace.h" 41 #include "libc_private.h" 42 #include "local.h" 43 #include "mblocal.h" 44 45 wchar_t * 46 fgetws_l(wchar_t * __restrict ws, int n, FILE * __restrict fp, locale_t locale) 47 { 48 int sret; 49 wchar_t *wsp, *ret; 50 size_t nconv; 51 const char *src; 52 unsigned char *nl; 53 FIX_LOCALE(locale); 54 struct xlocale_ctype *l = XLOCALE_CTYPE(locale); 55 56 FLOCKFILE_CANCELSAFE(fp); 57 ORIENT(fp, 1); 58 59 if (n <= 0) { 60 fp->_flags |= __SERR; 61 errno = EINVAL; 62 goto error; 63 } 64 65 wsp = ws; 66 if (n == 1) 67 goto ok; 68 69 if (fp->_r <= 0 && __srefill(fp)) 70 /* EOF or ferror */ 71 goto error; 72 73 sret = 0; 74 do { 75 src = fp->_p; 76 nl = memchr(fp->_p, '\n', fp->_r); 77 nconv = l->__mbsnrtowcs(wsp, &src, 78 nl != NULL ? (nl - fp->_p + 1) : fp->_r, 79 n - 1, &fp->_mbstate); 80 if (nconv == (size_t)-1) { 81 /* Conversion error */ 82 fp->_flags |= __SERR; 83 goto error; 84 } 85 if (src == NULL) { 86 /* 87 * We hit a null byte. Increment the character count, 88 * since mbsnrtowcs()'s return value doesn't include 89 * the terminating null, then resume conversion 90 * after the null. 91 */ 92 nconv++; 93 src = memchr(fp->_p, '\0', fp->_r); 94 src++; 95 } 96 fp->_r -= (unsigned char *)src - fp->_p; 97 fp->_p = (unsigned char *)src; 98 n -= nconv; 99 wsp += nconv; 100 } while ((wsp == ws || wsp[-1] != L'\n') && n > 1 && (fp->_r > 0 || 101 (sret = __srefill(fp)) == 0)); 102 if (sret && !__sfeof(fp)) 103 /* ferror */ 104 goto error; 105 if (!l->__mbsinit(&fp->_mbstate)) { 106 /* Incomplete character */ 107 fp->_flags |= __SERR; 108 errno = EILSEQ; 109 goto error; 110 } 111 if (wsp == ws) 112 /* EOF */ 113 goto error; 114 ok: 115 *wsp = L'\0'; 116 ret = ws; 117 end: 118 FUNLOCKFILE_CANCELSAFE(); 119 return (ret); 120 121 error: 122 ret = NULL; 123 goto end; 124 } 125 126 wchar_t * 127 fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp) 128 { 129 return fgetws_l(ws, n, fp, __get_locale()); 130 } 131