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 <stdlib.h> 38 #include <wchar.h> 39 #include "un-namespace.h" 40 #include "libc_private.h" 41 #include "local.h" 42 #include "mblocal.h" 43 #include "xlocale_private.h" 44 45 /* 46 * MT-safe version. 47 */ 48 wint_t 49 fgetwc_l(FILE *fp, locale_t locale) 50 { 51 wint_t r; 52 FIX_LOCALE(locale); 53 54 FLOCKFILE_CANCELSAFE(fp); 55 ORIENT(fp, 1); 56 r = __fgetwc(fp, locale); 57 FUNLOCKFILE_CANCELSAFE(); 58 59 return (r); 60 } 61 62 wint_t 63 fgetwc(FILE *fp) 64 { 65 return fgetwc_l(fp, __get_locale()); 66 } 67 68 /* 69 * Internal (non-MPSAFE) version of fgetwc(). This version takes an 70 * mbstate_t argument specifying the initial conversion state. For 71 * wide streams, this should always be fp->_mbstate. On return, *nread 72 * is set to the number of bytes read. 73 */ 74 wint_t 75 __fgetwc_mbs(FILE *fp, mbstate_t *mbs, int *nread, locale_t locale) 76 { 77 wchar_t wc; 78 size_t nconv; 79 struct xlocale_ctype *l = XLOCALE_CTYPE(locale); 80 81 *nread = 0; 82 if (fp->_r <= 0 && __srefill(fp)) 83 return (WEOF); 84 do { 85 nconv = l->__mbrtowc(&wc, fp->_p, fp->_r, mbs); 86 if (nconv == (size_t)-1) { 87 fp->_flags |= __SERR; 88 return (WEOF); 89 } else if (nconv == (size_t)-2) 90 continue; 91 else if (nconv == 0) { 92 fp->_p++; 93 fp->_r--; 94 (*nread)++; 95 return (L'\0'); 96 } else { 97 fp->_p += nconv; 98 fp->_r -= nconv; 99 *nread += nconv; 100 return (wc); 101 } 102 } while (__srefill(fp) == 0); 103 if (__sfeof(fp)) { 104 fp->_flags |= __SERR; 105 errno = EILSEQ; 106 } 107 return (WEOF); 108 } 109