setrunelocale.c revision 175553
1/*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Paul Borman at Krystal Technologies. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/lib/libc/locale/setrunelocale.c 175553 2008-01-21 23:48:12Z ache $"); 35 36#include <runetype.h> 37#include <errno.h> 38#include <limits.h> 39#include <string.h> 40#include <stdio.h> 41#include <stdlib.h> 42#include <unistd.h> 43#include <wchar.h> 44#include "ldpart.h" 45#include "mblocal.h" 46#include "setlocale.h" 47 48extern int __mb_sb_limit; 49 50extern _RuneLocale *_Read_RuneMagi(FILE *); 51 52static int __setrunelocale(const char *); 53 54static int 55__setrunelocale(const char *encoding) 56{ 57 FILE *fp; 58 char name[PATH_MAX]; 59 _RuneLocale *rl; 60 int saverr, ret; 61 static char ctype_encoding[ENCODING_LEN + 1]; 62 static _RuneLocale *CachedRuneLocale; 63 static int Cached__mb_cur_max; 64 static int Cached__mb_sb_limit; 65 static size_t (*Cached__mbrtowc)(wchar_t * __restrict, 66 const char * __restrict, size_t, mbstate_t * __restrict); 67 static size_t (*Cached__wcrtomb)(char * __restrict, wchar_t, 68 mbstate_t * __restrict); 69 static int (*Cached__mbsinit)(const mbstate_t *); 70 static size_t (*Cached__mbsnrtowcs)(wchar_t * __restrict, 71 const char ** __restrict, size_t, size_t, mbstate_t * __restrict); 72 static size_t (*Cached__wcsnrtombs)(char * __restrict, 73 const wchar_t ** __restrict, size_t, size_t, 74 mbstate_t * __restrict); 75 76 /* 77 * The "C" and "POSIX" locale are always here. 78 */ 79 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) { 80 _none_init(&_DefaultRuneLocale); 81 return (0); 82 } 83 84 /* 85 * If the locale name is the same as our cache, use the cache. 86 */ 87 if (CachedRuneLocale != NULL && 88 strcmp(encoding, ctype_encoding) == 0) { 89 _CurrentRuneLocale = CachedRuneLocale; 90 __mb_cur_max = Cached__mb_cur_max; 91 __mb_sb_limit = Cached__mb_sb_limit; 92 __mbrtowc = Cached__mbrtowc; 93 __mbsinit = Cached__mbsinit; 94 __mbsnrtowcs = Cached__mbsnrtowcs; 95 __wcrtomb = Cached__wcrtomb; 96 __wcsnrtombs = Cached__wcsnrtombs; 97 return (0); 98 } 99 100 /* 101 * Slurp the locale file into the cache. 102 */ 103 104 /* Range checking not needed, encoding length already checked before */ 105 (void) strcpy(name, _PathLocale); 106 (void) strcat(name, "/"); 107 (void) strcat(name, encoding); 108 (void) strcat(name, "/LC_CTYPE"); 109 110 if ((fp = fopen(name, "r")) == NULL) 111 return (errno == 0 ? ENOENT : errno); 112 113 if ((rl = _Read_RuneMagi(fp)) == NULL) { 114 saverr = (errno == 0 ? EFTYPE : errno); 115 (void)fclose(fp); 116 return (saverr); 117 } 118 (void)fclose(fp); 119 120 __mbrtowc = NULL; 121 __mbsinit = NULL; 122 __mbsnrtowcs = __mbsnrtowcs_std; 123 __wcrtomb = NULL; 124 __wcsnrtombs = __wcsnrtombs_std; 125 rl->__sputrune = NULL; 126 rl->__sgetrune = NULL; 127 if (strcmp(rl->__encoding, "NONE") == 0) 128 ret = _none_init(rl); 129 else if (strcmp(rl->__encoding, "ASCII") == 0) 130 ret = _ascii_init(rl); 131 else if (strcmp(rl->__encoding, "UTF-8") == 0) 132 ret = _UTF8_init(rl); 133 else if (strcmp(rl->__encoding, "EUC") == 0) 134 ret = _EUC_init(rl); 135 else if (strcmp(rl->__encoding, "GB18030") == 0) 136 ret = _GB18030_init(rl); 137 else if (strcmp(rl->__encoding, "GB2312") == 0) 138 ret = _GB2312_init(rl); 139 else if (strcmp(rl->__encoding, "GBK") == 0) 140 ret = _GBK_init(rl); 141 else if (strcmp(rl->__encoding, "BIG5") == 0) 142 ret = _BIG5_init(rl); 143 else if (strcmp(rl->__encoding, "MSKanji") == 0) 144 ret = _MSKanji_init(rl); 145 else 146 ret = EFTYPE; 147 if (ret == 0) { 148 if (CachedRuneLocale != NULL) { 149 /* See euc.c */ 150 if (strcmp(CachedRuneLocale->__encoding, "EUC") == 0) 151 free(CachedRuneLocale->__variable); 152 free(CachedRuneLocale); 153 } 154 CachedRuneLocale = _CurrentRuneLocale; 155 Cached__mb_cur_max = __mb_cur_max; 156 Cached__mb_sb_limit = __mb_sb_limit; 157 Cached__mbrtowc = __mbrtowc; 158 Cached__mbsinit = __mbsinit; 159 Cached__mbsnrtowcs = __mbsnrtowcs; 160 Cached__wcrtomb = __wcrtomb; 161 Cached__wcsnrtombs = __wcsnrtombs; 162 (void)strcpy(ctype_encoding, encoding); 163 } else 164 free(rl); 165 166 return (ret); 167} 168 169int 170__wrap_setrunelocale(const char *locale) 171{ 172 int ret = __setrunelocale(locale); 173 174 if (ret != 0) { 175 errno = ret; 176 return (_LDP_ERROR); 177 } 178 return (_LDP_LOADED); 179} 180 181