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 "namespace.h" 35 #include <errno.h> 36 #include <stdio.h> 37 #include <string.h> 38 #include <wchar.h> 39 #include "un-namespace.h" 40 #include "libc_private.h" 41 #include "local.h" 42 #include "mblocal.h" 43 44 wchar_t * 45 fgetws_l(wchar_t * __restrict ws, int n, FILE * __restrict fp, locale_t locale) 46 { 47 int sret; 48 wchar_t *wsp, *ret; 49 size_t nconv; 50 const char *src; 51 unsigned char *nl; 52 FIX_LOCALE(locale); 53 struct xlocale_ctype *l = XLOCALE_CTYPE(locale); 54 55 FLOCKFILE_CANCELSAFE(fp); 56 ORIENT(fp, 1); 57 58 if (n <= 0) { 59 fp->_flags |= __SERR; 60 errno = EINVAL; 61 goto error; 62 } 63 64 wsp = ws; 65 if (n == 1) 66 goto ok; 67 68 if (fp->_r <= 0 && __srefill(fp)) 69 /* EOF or ferror */ 70 goto error; 71 72 sret = 0; 73 do { 74 src = fp->_p; 75 nl = memchr(fp->_p, '\n', fp->_r); 76 nconv = l->__mbsnrtowcs(wsp, &src, 77 nl != NULL ? (nl - fp->_p + 1) : fp->_r, 78 n - 1, &fp->_mbstate); 79 if (nconv == (size_t)-1) { 80 /* Conversion error */ 81 fp->_flags |= __SERR; 82 goto error; 83 } 84 if (src == NULL) { 85 /* 86 * We hit a null byte. Increment the character count, 87 * since mbsnrtowcs()'s return value doesn't include 88 * the terminating null, then resume conversion 89 * after the null. 90 */ 91 nconv++; 92 src = memchr(fp->_p, '\0', fp->_r); 93 src++; 94 } 95 fp->_r -= (unsigned char *)src - fp->_p; 96 fp->_p = (unsigned char *)src; 97 n -= nconv; 98 wsp += nconv; 99 } while ((wsp == ws || wsp[-1] != L'\n') && n > 1 && (fp->_r > 0 || 100 (sret = __srefill(fp)) == 0)); 101 if (sret && !__sfeof(fp)) 102 /* ferror */ 103 goto error; 104 if (!l->__mbsinit(&fp->_mbstate)) { 105 /* Incomplete character */ 106 fp->_flags |= __SERR; 107 errno = EILSEQ; 108 goto error; 109 } 110 if (wsp == ws) 111 /* EOF */ 112 goto error; 113 ok: 114 *wsp = L'\0'; 115 ret = ws; 116 end: 117 FUNLOCKFILE_CANCELSAFE(); 118 return (ret); 119 120 error: 121 ret = NULL; 122 goto end; 123 } 124 125 wchar_t * 126 fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp) 127 { 128 return fgetws_l(ws, n, fp, __get_locale()); 129 } 130