locale/setrunelocale-fbsd.c

   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  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD: src/lib/libc/locale/setrunelocale.c,v 1.44 2004/10/18 02:06:18 ache Exp $");
  39
  40 #include "xlocale_private.h"
  41
  42 #include <runetype.h>
  43 #include <errno.h>
  44 #include <limits.h>
  45 #include <string.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <unistd.h>
  49 #include <wchar.h>
  50 #include "ldpart.h"
  51 #include "mblocal.h"
  52 #include "setlocale.h"
  53
  54 extern int              _none_init(struct __xlocale_st_runelocale *);
  55 extern int              _UTF8_init(struct __xlocale_st_runelocale *);
  56 extern int              _EUC_init(struct __xlocale_st_runelocale *);
  57 extern int              _GB18030_init(struct __xlocale_st_runelocale *);
  58 extern int              _GB2312_init(struct __xlocale_st_runelocale *);
  59 extern int              _GBK_init(struct __xlocale_st_runelocale *);
  60 extern int              _BIG5_init(struct __xlocale_st_runelocale *);
  61 extern int              _MSKanji_init(struct __xlocale_st_runelocale *);
  62 extern int              _UTF2_init(struct __xlocale_st_runelocale *);   /* deprecated */
  63 extern struct __xlocale_st_runelocale   *_Read_RuneMagi(FILE *);
  64
  65 extern void spin_lock(int *);
  66 extern void spin_unlock(int *);
  67
  68 /* depreciated interfaces */
  69 rune_t  sgetrune(const char *, size_t, char const **);
  70 int     sputrune(rune_t, char *, size_t, char **);
  71
  72 __private_extern__ int
  73 __setrunelocale(const char *encoding, locale_t loc)
  74 {
  75         FILE *fp;
  76         char name[PATH_MAX];
  77         struct __xlocale_st_runelocale *xrl;
  78         _RuneLocale *rl;
  79         int saverr, ret;
  80         static struct __xlocale_st_runelocale *CachedRuneLocale;
  81         extern int __mb_cur_max;
  82         static int cache_lock = 0;
  83
  84         /*
  85          * The "C" and "POSIX" locale are always here.
  86          */
  87         if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
  88                 XL_RELEASE(loc->__lc_ctype);
  89                 loc->__lc_ctype = &_DefaultRuneXLocale;
  90                 /* no need to retain _DefaultRuneXLocale */
  91                 if (loc == &__global_locale) {
  92                         _CurrentRuneLocale = &loc->__lc_ctype->_CurrentRuneLocale;
  93                         __mb_cur_max = loc->__lc_ctype->__mb_cur_max;
  94                 }
  95                 return (0);
  96         }
  97
  98         /*
  99          * If the locale name is the same as our cache, use the cache.
 100          */
 101         spin_lock(&cache_lock);
 102         if (CachedRuneLocale != NULL &&
 103             strcmp(encoding, CachedRuneLocale->__ctype_encoding) == 0) {
 104                 XL_RELEASE(loc->__lc_ctype);
 105                 loc->__lc_ctype = CachedRuneLocale;
 106                 XL_RETAIN(loc->__lc_ctype);
 107                 if (loc == &__global_locale) {
 108                         _CurrentRuneLocale = &loc->__lc_ctype->_CurrentRuneLocale;
 109                         __mb_cur_max = loc->__lc_ctype->__mb_cur_max;
 110                 }
 111                 spin_unlock(&cache_lock);
 112                 return (0);
 113         }
 114         spin_unlock(&cache_lock);
 115
 116         /*
 117          * Slurp the locale file into the cache.
 118          */
 119
 120         /* Range checking not needed, encoding length already checked before */
 121         (void) strcpy(name, _PathLocale);
 122         (void) strcat(name, "/");
 123         (void) strcat(name, encoding);
 124         (void) strcat(name, "/LC_CTYPE");
 125
 126         if ((fp = fopen(name, "r")) == NULL)
 127                 return (errno == 0 ? ENOENT : errno);
 128
 129         if ((xrl = _Read_RuneMagi(fp)) == NULL) {
 130                 saverr = (errno == 0 ? EFTYPE : errno);
 131                 (void)fclose(fp);
 132                 return (saverr);
 133         }
 134         (void)fclose(fp);
 135
 136         xrl->__mbrtowc = NULL;
 137         xrl->__mbsinit = NULL;
 138         xrl->__mbsnrtowcs = __mbsnrtowcs_std;
 139         xrl->__wcrtomb = NULL;
 140         xrl->__wcsnrtombs = __wcsnrtombs_std;
 141
 142         rl = &xrl->_CurrentRuneLocale;
 143
 144         /* provide backwards compatibility (depreciated interface) */
 145         rl->__sputrune = sputrune;
 146         rl->__sgetrune = sgetrune;
 147
 148         if (strcmp(rl->__encoding, "NONE") == 0)
 149                 ret = _none_init(xrl);
 150         else if (strcmp(rl->__encoding, "UTF-8") == 0)
 151                 ret = _UTF8_init(xrl);
 152         else if (strcmp(rl->__encoding, "EUC") == 0)
 153                 ret = _EUC_init(xrl);
 154         else if (strcmp(rl->__encoding, "GB18030") == 0)
 155                 ret = _GB18030_init(xrl);
 156         else if (strcmp(rl->__encoding, "GB2312") == 0)
 157                 ret = _GB2312_init(xrl);
 158         else if (strcmp(rl->__encoding, "GBK") == 0)
 159                 ret = _GBK_init(xrl);
 160         else if (strcmp(rl->__encoding, "BIG5") == 0)
 161                 ret = _BIG5_init(xrl);
 162         else if (strcmp(rl->__encoding, "MSKanji") == 0)
 163                 ret = _MSKanji_init(xrl);
 164         else if (strcmp(rl->__encoding, "UTF2") == 0)
 165                 ret = _UTF2_init(xrl);
 166         else
 167                 ret = EFTYPE;
 168         if (ret == 0) {
 169                 (void)strcpy(xrl->__ctype_encoding, encoding);
 170                 XL_RELEASE(loc->__lc_ctype);
 171                 loc->__lc_ctype = xrl;
 172                 if (loc == &__global_locale) {
 173                         _CurrentRuneLocale = &loc->__lc_ctype->_CurrentRuneLocale;
 174                         __mb_cur_max = loc->__lc_ctype->__mb_cur_max;
 175                 }
 176                 spin_lock(&cache_lock);
 177                 XL_RELEASE(CachedRuneLocale);
 178                 CachedRuneLocale = xrl;
 179                 XL_RETAIN(CachedRuneLocale);
 180                 spin_unlock(&cache_lock);
 181         } else
 182                 XL_RELEASE(xrl);
 183
 184         return (ret);
 185 }
 186
 187 int
 188 setrunelocale(const char *encoding)
 189 {
 190         return __setrunelocale(encoding, &__global_locale);
 191 }
 192
 193 __private_extern__ int
 194 __wrap_setrunelocale(const char *locale, locale_t loc)
 195 {
 196         int ret = __setrunelocale(locale, loc);
 197
 198         if (ret != 0) {
 199                 errno = ret;
 200                 return (_LDP_ERROR);
 201         }
 202         return (_LDP_LOADED);
 203 }
 204