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 #include <errno.h> 44 #include <limits.h> 45 #include <runetype.h> 46 #include <stddef.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <wchar.h> 51 #include "mblocal.h" 52 53 static size_t _none_mbrtowc(wchar_t * __restrict, const char * __restrict, 54 size_t, mbstate_t * __restrict); 55 static int _none_mbsinit(const mbstate_t *); 56 static size_t _none_mbsnrtowcs(wchar_t * __restrict dst, 57 const char ** __restrict src, size_t nms, size_t len, 58 mbstate_t * __restrict ps __unused); 59 static size_t _none_wcrtomb(char * __restrict, wchar_t, 60 mbstate_t * __restrict); 61 static size_t _none_wcsnrtombs(char * __restrict, const wchar_t ** __restrict, 62 size_t, size_t, mbstate_t * __restrict); 63 64 /* setup defaults */ 65 66 int __mb_cur_max = 1; 67 int __mb_sb_limit = 256; /* Expected to be <= _CACHED_RUNES */ 68 69 int 70 _none_init(struct xlocale_ctype *l, _RuneLocale *rl) 71 { 72 73 l->__mbrtowc = _none_mbrtowc; 74 l->__mbsinit = _none_mbsinit; 75 l->__mbsnrtowcs = _none_mbsnrtowcs; 76 l->__wcrtomb = _none_wcrtomb; 77 l->__wcsnrtombs = _none_wcsnrtombs; 78 l->runes = rl; 79 l->__mb_cur_max = 1; 80 l->__mb_sb_limit = 256; 81 return(0); 82 } 83 84 static int 85 _none_mbsinit(const mbstate_t *ps __unused) 86 { 87 88 /* 89 * Encoding is not state dependent - we are always in the 90 * initial state. 91 */ 92 return (1); 93 } 94 95 static size_t 96 _none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 97 mbstate_t * __restrict ps __unused) 98 { 99 100 if (s == NULL) 101 /* Reset to initial shift state (no-op) */ 102 return (0); 103 if (n == 0) 104 /* Incomplete multibyte sequence */ 105 return ((size_t)-2); 106 if (pwc != NULL) 107 *pwc = (unsigned char)*s; 108 return (*s == '\0' ? 0 : 1); 109 } 110 111 static size_t 112 _none_wcrtomb(char * __restrict s, wchar_t wc, 113 mbstate_t * __restrict ps __unused) 114 { 115 116 if (s == NULL) 117 /* Reset to initial shift state (no-op) */ 118 return (1); 119 if (wc < 0 || wc > UCHAR_MAX) { 120 errno = EILSEQ; 121 return ((size_t)-1); 122 } 123 *s = (unsigned char)wc; 124 return (1); 125 } 126 127 static size_t 128 _none_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 129 size_t nms, size_t len, mbstate_t * __restrict ps __unused) 130 { 131 const char *s; 132 size_t nchr; 133 134 if (dst == NULL) { 135 s = memchr(*src, '\0', nms); 136 return (s != NULL ? s - *src : nms); 137 } 138 139 s = *src; 140 nchr = 0; 141 while (len-- > 0 && nms-- > 0) { 142 if ((*dst++ = (unsigned char)*s++) == L'\0') { 143 *src = NULL; 144 return (nchr); 145 } 146 nchr++; 147 } 148 *src = s; 149 return (nchr); 150 } 151 152 static size_t 153 _none_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, 154 size_t nwc, size_t len, mbstate_t * __restrict ps __unused) 155 { 156 const wchar_t *s; 157 size_t nchr; 158 159 if (dst == NULL) { 160 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) { 161 if (*s < 0 || *s > UCHAR_MAX) { 162 errno = EILSEQ; 163 return ((size_t)-1); 164 } 165 } 166 return (s - *src); 167 } 168 169 s = *src; 170 nchr = 0; 171 while (len-- > 0 && nwc-- > 0) { 172 if (*s < 0 || *s > UCHAR_MAX) { 173 *src = s; 174 errno = EILSEQ; 175 return ((size_t)-1); 176 } 177 if ((*dst++ = *s++) == '\0') { 178 *src = NULL; 179 return (nchr); 180 } 181 nchr++; 182 } 183 *src = s; 184 return (nchr); 185 } 186 187 /* setup defaults */ 188 189 struct xlocale_ctype __xlocale_global_ctype = { 190 {{0}, "C"}, 191 (_RuneLocale*)&_DefaultRuneLocale, 192 _none_mbrtowc, 193 _none_mbsinit, 194 _none_mbsnrtowcs, 195 _none_wcrtomb, 196 _none_wcsnrtombs, 197 1, /* __mb_cur_max, */ 198 256 /* __mb_sb_limit */ 199 }; 200 201 struct xlocale_ctype __xlocale_C_ctype = { 202 {{0}, "C"}, 203 (_RuneLocale*)&_DefaultRuneLocale, 204 _none_mbrtowc, 205 _none_mbsinit, 206 _none_mbsnrtowcs, 207 _none_wcrtomb, 208 _none_wcsnrtombs, 209 1, /* __mb_cur_max, */ 210 256 /* __mb_sb_limit */ 211 }; 212