1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Paul Borman at Krystal Technologies. 9 * 10 * Copyright (c) 2011 The FreeBSD Foundation 11 * 12 * Portions of this software were developed by David Chisnall 13 * under sponsorship from the FreeBSD Foundation. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 #define __RUNETYPE_INTERNAL 1 42 43 #include <runetype.h> 44 #include <errno.h> 45 #include <limits.h> 46 #include <string.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <unistd.h> 50 #include <wchar.h> 51 #include "ldpart.h" 52 #include "mblocal.h" 53 #include "setlocale.h" 54 55 #undef _CurrentRuneLocale 56 extern _RuneLocale const *_CurrentRuneLocale; 57 /* 58 * A cached version of the runes for this thread. Used by ctype.h 59 */ 60 _Thread_local const _RuneLocale *_ThreadRuneLocale; 61 62 extern int __mb_sb_limit; 63 64 extern _RuneLocale *_Read_RuneMagi(const char *); 65 66 static int __setrunelocale(struct xlocale_ctype *l, const char *); 67 68 static void 69 destruct_ctype(void *v) 70 { 71 struct xlocale_ctype *l = v; 72 73 if (&_DefaultRuneLocale != l->runes) 74 free(l->runes); 75 free(l); 76 } 77 78 const _RuneLocale * 79 __getCurrentRuneLocale(void) 80 { 81 82 return (XLOCALE_CTYPE(__get_locale())->runes); 83 } 84 85 static void 86 free_runes(_RuneLocale *rl) 87 { 88 if ((rl != &_DefaultRuneLocale) && (rl)) { 89 free(rl); 90 } 91 } 92 93 static int 94 __setrunelocale(struct xlocale_ctype *l, const char *encoding) 95 { 96 _RuneLocale *rl; 97 int ret; 98 char *path; 99 struct xlocale_ctype saved = *l; 100 101 /* 102 * The "C" and "POSIX" locale are always here. 103 */ 104 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) { 105 free_runes(saved.runes); 106 (void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale); 107 return (0); 108 } 109 110 /* Range checking not needed, encoding length already checked before */ 111 if (asprintf(&path, "%s/%s/LC_CTYPE", _PathLocale, encoding) == -1) 112 return (errno); 113 114 if ((rl = _Read_RuneMagi(path)) == NULL) { 115 free(path); 116 errno = EINVAL; 117 return (errno); 118 } 119 free(path); 120 121 l->__mbrtowc = NULL; 122 l->__mbsinit = NULL; 123 l->__mbsnrtowcs = NULL; 124 l->__wcrtomb = NULL; 125 l->__wcsnrtombs = NULL; 126 127 rl->__sputrune = NULL; 128 rl->__sgetrune = NULL; 129 if (strcmp(rl->__encoding, "NONE:US-ASCII") == 0) 130 ret = _ascii_init(l, rl); 131 else if (strncmp(rl->__encoding, "NONE", 4) == 0) 132 ret = _none_init(l, rl); 133 else if (strcmp(rl->__encoding, "UTF-8") == 0) 134 ret = _UTF8_init(l, rl); 135 else if (strcmp(rl->__encoding, "EUC-CN") == 0) 136 ret = _EUC_CN_init(l, rl); 137 else if (strcmp(rl->__encoding, "EUC-JP") == 0) 138 ret = _EUC_JP_init(l, rl); 139 else if (strcmp(rl->__encoding, "EUC-KR") == 0) 140 ret = _EUC_KR_init(l, rl); 141 else if (strcmp(rl->__encoding, "EUC-TW") == 0) 142 ret = _EUC_TW_init(l, rl); 143 else if (strcmp(rl->__encoding, "GB18030") == 0) 144 ret = _GB18030_init(l, rl); 145 else if (strcmp(rl->__encoding, "GB2312") == 0) 146 ret = _GB2312_init(l, rl); 147 else if (strcmp(rl->__encoding, "GBK") == 0) 148 ret = _GBK_init(l, rl); 149 else if (strcmp(rl->__encoding, "BIG5") == 0) 150 ret = _BIG5_init(l, rl); 151 else if (strcmp(rl->__encoding, "MSKanji") == 0) 152 ret = _MSKanji_init(l, rl); 153 else 154 ret = EFTYPE; 155 156 if (ret == 0) { 157 /* Free the old runes if it exists. */ 158 free_runes(saved.runes); 159 /* Reset the mbstates */ 160 memset(&l->c16rtomb, 0, sizeof(l->c16rtomb)); 161 memset(&l->c32rtomb, 0, sizeof(l->c32rtomb)); 162 memset(&l->mblen, 0, sizeof(l->mblen)); 163 memset(&l->mbrlen, 0, sizeof(l->mbrlen)); 164 memset(&l->mbrtoc16, 0, sizeof(l->mbrtoc16)); 165 memset(&l->mbrtoc32, 0, sizeof(l->mbrtoc32)); 166 memset(&l->mbrtowc, 0, sizeof(l->mbrtowc)); 167 memset(&l->mbsnrtowcs, 0, sizeof(l->mbsnrtowcs)); 168 memset(&l->mbsrtowcs, 0, sizeof(l->mbsrtowcs)); 169 memset(&l->mbtowc, 0, sizeof(l->mbtowc)); 170 memset(&l->wcrtomb, 0, sizeof(l->wcrtomb)); 171 memset(&l->wcsnrtombs, 0, sizeof(l->wcsnrtombs)); 172 memset(&l->wcsrtombs, 0, sizeof(l->wcsrtombs)); 173 memset(&l->wctomb, 0, sizeof(l->wctomb)); 174 } else { 175 /* Restore the saved version if this failed. */ 176 memcpy(l, &saved, sizeof(struct xlocale_ctype)); 177 free(rl); 178 } 179 180 return (ret); 181 } 182 183 int 184 __wrap_setrunelocale(const char *locale) 185 { 186 int ret = __setrunelocale(&__xlocale_global_ctype, locale); 187 188 if (ret != 0) { 189 errno = ret; 190 return (_LDP_ERROR); 191 } 192 __mb_cur_max = __xlocale_global_ctype.__mb_cur_max; 193 __mb_sb_limit = __xlocale_global_ctype.__mb_sb_limit; 194 _CurrentRuneLocale = __xlocale_global_ctype.runes; 195 return (_LDP_LOADED); 196 } 197 198 void 199 __set_thread_rune_locale(locale_t loc) 200 { 201 202 if (loc == NULL) { 203 _ThreadRuneLocale = &_DefaultRuneLocale; 204 } else if (loc == LC_GLOBAL_LOCALE) { 205 _ThreadRuneLocale = 0; 206 } else { 207 _ThreadRuneLocale = XLOCALE_CTYPE(loc)->runes; 208 } 209 } 210 211 void * 212 __ctype_load(const char *locale, locale_t unused __unused) 213 { 214 struct xlocale_ctype *l = calloc(sizeof(struct xlocale_ctype), 1); 215 if (l == NULL) 216 return (NULL); 217 218 l->header.header.destructor = destruct_ctype; 219 if (__setrunelocale(l, locale)) { 220 free(l); 221 return (NULL); 222 } 223 return (l); 224 } 225