1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright 2013 Garrett D'Amore <garrett@damore.org> 5 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 6 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved. 7 * Copyright (c) 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Paul Borman at Krystal Technologies. 12 * 13 * Copyright (c) 2011 The FreeBSD Foundation 14 * 15 * Portions of this software were developed by David Chisnall 16 * under sponsorship from the FreeBSD Foundation. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 3. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 */ 42 43 #if defined(LIBC_SCCS) && !defined(lint) 44 static char sccsid[] = "@(#)none.c 8.1 (Berkeley) 6/4/93"; 45 #endif /* LIBC_SCCS and not lint */ 46 #include <errno.h> 47 #include <limits.h> 48 #include <runetype.h> 49 #include <stddef.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <wchar.h> 54 #include "mblocal.h" 55 56 static size_t _none_mbrtowc(wchar_t * __restrict, const char * __restrict, 57 size_t, mbstate_t * __restrict); 58 static int _none_mbsinit(const mbstate_t *); 59 static size_t _none_mbsnrtowcs(wchar_t * __restrict dst, 60 const char ** __restrict src, size_t nms, size_t len, 61 mbstate_t * __restrict ps __unused); 62 static size_t _none_wcrtomb(char * __restrict, wchar_t, 63 mbstate_t * __restrict); 64 static size_t _none_wcsnrtombs(char * __restrict, const wchar_t ** __restrict, 65 size_t, size_t, mbstate_t * __restrict); 66 67 /* setup defaults */ 68 69 int __mb_cur_max = 1; 70 int __mb_sb_limit = 256; /* Expected to be <= _CACHED_RUNES */ 71 72 int 73 _none_init(struct xlocale_ctype *l, _RuneLocale *rl) 74 { 75 76 l->__mbrtowc = _none_mbrtowc; 77 l->__mbsinit = _none_mbsinit; 78 l->__mbsnrtowcs = _none_mbsnrtowcs; 79 l->__wcrtomb = _none_wcrtomb; 80 l->__wcsnrtombs = _none_wcsnrtombs; 81 l->runes = rl; 82 l->__mb_cur_max = 1; 83 l->__mb_sb_limit = 256; 84 return(0); 85 } 86 87 static int 88 _none_mbsinit(const mbstate_t *ps __unused) 89 { 90 91 /* 92 * Encoding is not state dependent - we are always in the 93 * initial state. 94 */ 95 return (1); 96 } 97 98 static size_t 99 _none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 100 mbstate_t * __restrict ps __unused) 101 { 102 103 if (s == NULL) 104 /* Reset to initial shift state (no-op) */ 105 return (0); 106 if (n == 0) 107 /* Incomplete multibyte sequence */ 108 return ((size_t)-2); 109 if (pwc != NULL) 110 *pwc = (unsigned char)*s; 111 return (*s == '\0' ? 0 : 1); 112 } 113 114 static size_t 115 _none_wcrtomb(char * __restrict s, wchar_t wc, 116 mbstate_t * __restrict ps __unused) 117 { 118 119 if (s == NULL) 120 /* Reset to initial shift state (no-op) */ 121 return (1); 122 if (wc < 0 || wc > UCHAR_MAX) { 123 errno = EILSEQ; 124 return ((size_t)-1); 125 } 126 *s = (unsigned char)wc; 127 return (1); 128 } 129 130 static size_t 131 _none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 132 size_t nms, size_t len, mbstate_t * __restrict ps __unused) 133 { 134 const char *s; 135 size_t nchr; 136 137 if (dst == NULL) { 138 s = memchr(*src, '\0', nms); 139 return (s != NULL ? s - *src : nms); 140 } 141 142 s = *src; 143 nchr = 0; 144 while (len-- > 0 && nms-- > 0) { 145 if ((*dst++ = (unsigned char)*s++) == L'\0') { 146 *src = NULL; 147 return (nchr); 148 } 149 nchr++; 150 } 151 *src = s; 152 return (nchr); 153 } 154 155 static size_t 156 _none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 157 size_t nwc, size_t len, mbstate_t * __restrict ps __unused) 158 { 159 const wchar_t *s; 160 size_t nchr; 161 162 if (dst == NULL) { 163 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) { 164 if (*s < 0 || *s > UCHAR_MAX) { 165 errno = EILSEQ; 166 return ((size_t)-1); 167 } 168 } 169 return (s - *src); 170 } 171 172 s = *src; 173 nchr = 0; 174 while (len-- > 0 && nwc-- > 0) { 175 if (*s < 0 || *s > UCHAR_MAX) { 176 *src = s; 177 errno = EILSEQ; 178 return ((size_t)-1); 179 } 180 if ((*dst++ = *s++) == '\0') { 181 *src = NULL; 182 return (nchr); 183 } 184 nchr++; 185 } 186 *src = s; 187 return (nchr); 188 } 189 190 /* setup defaults */ 191 192 struct xlocale_ctype __xlocale_global_ctype = { 193 {{0}, "C"}, 194 (_RuneLocale*)&_DefaultRuneLocale, 195 _none_mbrtowc, 196 _none_mbsinit, 197 _none_mbsnrtowcs, 198 _none_wcrtomb, 199 _none_wcsnrtombs, 200 1, /* __mb_cur_max, */ 201 256 /* __mb_sb_limit */ 202 }; 203 204 struct xlocale_ctype __xlocale_C_ctype = { 205 {{0}, "C"}, 206 (_RuneLocale*)&_DefaultRuneLocale, 207 _none_mbrtowc, 208 _none_mbsinit, 209 _none_mbsnrtowcs, 210 _none_wcrtomb, 211 _none_wcsnrtombs, 212 1, /* __mb_cur_max, */ 213 256 /* __mb_sb_limit */ 214 }; 215