locale/FreeBSD/setrunelocale.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 <runetype.h>
  41 #include <errno.h>
  42 #include <limits.h>
  43 #include <string.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <unistd.h>
  47 #include <wchar.h>
  48 #include "ldpart.h"
  49 #include "mblocal.h"
  50 #include "setlocale.h"
  51
  52 extern int              _none_init(_RuneLocale *);
  53 extern int              _UTF8_init(_RuneLocale *);
  54 extern int              _EUC_init(_RuneLocale *);
  55 extern int              _GB18030_init(_RuneLocale *);
  56 extern int              _GB2312_init(_RuneLocale *);
  57 extern int              _GBK_init(_RuneLocale *);
  58 extern int              _BIG5_init(_RuneLocale *);
  59 extern int              _MSKanji_init(_RuneLocale *);
  60 extern _RuneLocale      *_Read_RuneMagi(FILE *);
  61
  62 static int              __setrunelocale(const char *);
  63
  64 static int
  65 __setrunelocale(const char *encoding)
  66 {
  67         FILE *fp;
  68         char name[PATH_MAX];
  69         _RuneLocale *rl;
  70         int saverr, ret;
  71         static char ctype_encoding[ENCODING_LEN + 1];
  72         static _RuneLocale *CachedRuneLocale;
  73         static int Cached__mb_cur_max;
  74         static size_t (*Cached__mbrtowc)(wchar_t * __restrict,
  75             const char * __restrict, size_t, mbstate_t * __restrict);
  76         static size_t (*Cached__wcrtomb)(char * __restrict, wchar_t,
  77             mbstate_t * __restrict);
  78         static int (*Cached__mbsinit)(const mbstate_t *);
  79         static size_t (*Cached__mbsnrtowcs)(wchar_t * __restrict,
  80             const char ** __restrict, size_t, size_t, mbstate_t * __restrict);
  81         static size_t (*Cached__wcsnrtombs)(char * __restrict,
  82             const wchar_t ** __restrict, size_t, size_t,
  83             mbstate_t * __restrict);
  84
  85         /*
  86          * The "C" and "POSIX" locale are always here.
  87          */
  88         if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
  89                 _CurrentRuneLocale = &_DefaultRuneLocale;
  90                 __mb_cur_max = 1;
  91                 __mbrtowc = _none_mbrtowc;
  92                 __mbsinit = _none_mbsinit;
  93                 __mbsnrtowcs = _none_mbsnrtowcs;
  94                 __wcrtomb = _none_wcrtomb;
  95                 __wcsnrtombs = _none_wcsnrtombs;
  96                 return (0);
  97         }
  98
  99         /*
 100          * If the locale name is the same as our cache, use the cache.
 101          */
 102         if (CachedRuneLocale != NULL &&
 103             strcmp(encoding, ctype_encoding) == 0) {
 104                 _CurrentRuneLocale = CachedRuneLocale;
 105                 __mb_cur_max = Cached__mb_cur_max;
 106                 __mbrtowc = Cached__mbrtowc;
 107                 __mbsinit = Cached__mbsinit;
 108                 __mbsnrtowcs = Cached__mbsnrtowcs;
 109                 __wcrtomb = Cached__wcrtomb;
 110                 __wcsnrtombs = Cached__wcsnrtombs;
 111                 return (0);
 112         }
 113
 114         /*
 115          * Slurp the locale file into the cache.
 116          */
 117
 118         /* Range checking not needed, encoding length already checked before */
 119         (void) strcpy(name, _PathLocale);
 120         (void) strcat(name, "/");
 121         (void) strcat(name, encoding);
 122         (void) strcat(name, "/LC_CTYPE");
 123
 124         if ((fp = fopen(name, "r")) == NULL)
 125                 return (errno == 0 ? ENOENT : errno);
 126
 127         if ((rl = _Read_RuneMagi(fp)) == NULL) {
 128                 saverr = (errno == 0 ? EFTYPE : errno);
 129                 (void)fclose(fp);
 130                 return (saverr);
 131         }
 132         (void)fclose(fp);
 133
 134         __mbrtowc = NULL;
 135         __mbsinit = NULL;
 136         __mbsnrtowcs = __mbsnrtowcs_std;
 137         __wcrtomb = NULL;
 138         __wcsnrtombs = __wcsnrtombs_std;
 139         rl->__sputrune = NULL;
 140         rl->__sgetrune = NULL;
 141         if (strcmp(rl->__encoding, "NONE") == 0)
 142                 ret = _none_init(rl);
 143         else if (strcmp(rl->__encoding, "UTF-8") == 0)
 144                 ret = _UTF8_init(rl);
 145         else if (strcmp(rl->__encoding, "EUC") == 0)
 146                 ret = _EUC_init(rl);
 147         else if (strcmp(rl->__encoding, "GB18030") == 0)
 148                 ret = _GB18030_init(rl);
 149         else if (strcmp(rl->__encoding, "GB2312") == 0)
 150                 ret = _GB2312_init(rl);
 151         else if (strcmp(rl->__encoding, "GBK") == 0)
 152                 ret = _GBK_init(rl);
 153         else if (strcmp(rl->__encoding, "BIG5") == 0)
 154                 ret = _BIG5_init(rl);
 155         else if (strcmp(rl->__encoding, "MSKanji") == 0)
 156                 ret = _MSKanji_init(rl);
 157         else
 158                 ret = EFTYPE;
 159         if (ret == 0) {
 160                 if (CachedRuneLocale != NULL) {
 161                         /* See euc.c */
 162                         if (strcmp(CachedRuneLocale->__encoding, "EUC") == 0)
 163                                 free(CachedRuneLocale->__variable);
 164                         free(CachedRuneLocale);
 165                 }
 166                 CachedRuneLocale = _CurrentRuneLocale;
 167                 Cached__mb_cur_max = __mb_cur_max;
 168                 Cached__mbrtowc = __mbrtowc;
 169                 Cached__mbsinit = __mbsinit;
 170                 Cached__mbsnrtowcs = __mbsnrtowcs;
 171                 Cached__wcrtomb = __wcrtomb;
 172                 Cached__wcsnrtombs = __wcsnrtombs;
 173                 (void)strcpy(ctype_encoding, encoding);
 174         } else
 175                 free(rl);
 176
 177         return (ret);
 178 }
 179
 180 int
 181 __wrap_setrunelocale(const char *locale)
 182 {
 183         int ret = __setrunelocale(locale);
 184
 185         if (ret != 0) {
 186                 errno = ret;
 187                 return (_LDP_ERROR);
 188         }
 189         return (_LDP_LOADED);
 190 }
 191