1 /* 2 * Copyright 2014 Garrett D'Amore <garrett@damore.org> 3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 4 * Copyright (c) 1996 - 2002 FreeBSD Project 5 * Copyright (c) 1991, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Paul Borman at Krystal Technologies. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "lint.h" 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 #include <errno.h> 40 #include <limits.h> 41 #include <locale.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 #include <stdio.h> 46 #include "mtlib.h" 47 #include "collate.h" 48 #include "lnumeric.h" /* for struct lc_numeric */ 49 #include "lctype.h" /* for struct lc_ctype */ 50 #include "runetype.h" 51 #include "setlocale.h" 52 #include "../i18n/_loc_path.h" 53 #include "localeimpl.h" 54 #include "../i18n/_locale.h" 55 #include "libc.h" 56 57 /* 58 * Path to locale storage directory. See ../i18n/_loc_path.h 59 */ 60 char *_PathLocale = _DFLT_LOC_PATH; 61 62 static void install_legacy(locale_t, int); 63 64 static mutex_t setlocale_lock = DEFAULTMUTEX; 65 static locale_t setlocale_list = NULL; 66 67 char * 68 setlocale(int category, const char *locname) 69 { 70 locale_t loc; 71 locale_t srch; 72 int mask; 73 74 if (category < 0 || category > LC_ALL) { 75 errno = EINVAL; 76 return (NULL); 77 } 78 79 if (locname == NULL) 80 return (current_locale(___global_locale, category)); 81 82 mask = (category == LC_ALL ? LC_ALL_MASK : (1 << category)); 83 84 loc = newlocale(mask, locname, NULL); 85 if (loc == NULL) { 86 return (NULL); 87 } 88 89 /* 90 * This next logic looks to see if we have ever used the same locale 91 * settings before. If so, we reuse it. We avoid ever calling 92 * freelocale() on a locale setting built up by setlocale, this 93 * ensures that consumers (uselocale) will always be thread safe; 94 * the actual locale data objects are never freed, and unique 95 * locale objects are also never freed. We reuse to avoid leaking 96 * memory in applications that call setlocale repeatedly. 97 */ 98 lmutex_lock(&setlocale_lock); 99 for (srch = setlocale_list; srch != NULL; srch = srch->next) { 100 if (strcmp(srch->locname, loc->locname) == 0) { 101 break; 102 } 103 } 104 105 if (srch == NULL) { 106 /* this is a new locale, save it for reuse later */ 107 loc->next = setlocale_list; 108 loc->on_list = 1; 109 setlocale_list = loc; 110 } else { 111 /* we already had it, toss the new, and use what we found */ 112 freelocale(loc); 113 loc = srch; 114 } 115 ___global_locale = loc; 116 117 install_legacy(loc, mask); 118 lmutex_unlock(&setlocale_lock); 119 120 return (current_locale(loc, category)); 121 } 122 123 char * 124 current_locale(locale_t loc, int cat) 125 { 126 switch (cat) { 127 case LC_CTYPE: 128 case LC_COLLATE: 129 case LC_MESSAGES: 130 case LC_MONETARY: 131 case LC_NUMERIC: 132 case LC_TIME: 133 return (loc->locdata[cat]->l_lname); 134 case LC_ALL: 135 return (loc->locname); 136 default: 137 return (NULL); 138 } 139 } 140 141 static void 142 install_legacy(locale_t loc, int mask) 143 { 144 /* 145 * Update the legacy fixed variables that may be baked into 146 * legacy programs. This is really unfortunate, but we can't 147 * solve for them otherwise. Note that such legacy programs 148 * are only going to see the global locale settings, and cannot 149 * benefit from uselocale(). 150 */ 151 if (mask & LC_NUMERIC_MASK) { 152 struct lc_numeric *lnum; 153 lnum = loc->locdata[LC_NUMERIC]->l_data[0]; 154 _numeric[0] = *lnum->decimal_point; 155 _numeric[1] = *lnum->thousands_sep; 156 } 157 158 if (mask & LC_CTYPE_MASK) { 159 struct lc_ctype *lct; 160 lct = loc->locdata[LC_CTYPE]->l_data[0]; 161 for (int i = 0; i < _CACHED_RUNES; i++) { 162 /* ctype can only encode the lower 8 bits. */ 163 __ctype[i+1] = lct->lc_ctype_mask[i] & 0xff; 164 __ctype_mask[i] = lct->lc_ctype_mask[i]; 165 } 166 167 /* The bottom half is the toupper/lower array */ 168 for (int i = 0; i < _CACHED_RUNES; i++) { 169 int u, l; 170 __ctype[258 + i] = i; 171 u = lct->lc_trans_upper[i]; 172 l = lct->lc_trans_lower[i]; 173 if (u && u != i) 174 __ctype[258+i] = u; 175 if (l && l != i) 176 __ctype[258+i] = l; 177 178 /* Don't forget these annoyances either! */ 179 __trans_upper[i] = u; 180 __trans_lower[i] = l; 181 } 182 183 /* Maximum mblen, cswidth, weird legacy */ 184 __ctype[520] = lct->lc_max_mblen; 185 } 186 } 187