1 /*
2 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
3 * Copyright (c) 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Paul Borman at Krystal Technologies.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "lint.h"
35 #include "file64.h"
36 #include <errno.h>
37 #include <limits.h>
38 #include <string.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <unistd.h>
42 #include <wchar.h>
43 #include "runetype.h"
44 #include "ldpart.h"
45 #include "mblocal.h"
46 #include "setlocale.h"
47 #include "_ctype.h"
48 #include "../i18n/_locale.h"
49
50 extern _RuneLocale *_Read_RuneMagi(FILE *);
51 extern unsigned char __ctype_C[];
52
53 static int __setrunelocale(const char *);
54
55 static int
56 __setrunelocale(const char *encoding)
57 {
58 FILE *fp;
59 char name[PATH_MAX];
60 _RuneLocale *rl;
61 int saverr, ret;
62 size_t (*old__mbrtowc)(wchar_t *_RESTRICT_KYWD,
63 const char *_RESTRICT_KYWD, size_t, mbstate_t *_RESTRICT_KYWD);
64 size_t (*old__wcrtomb)(char *_RESTRICT_KYWD, wchar_t,
65 mbstate_t *_RESTRICT_KYWD);
66 int (*old__mbsinit)(const mbstate_t *);
67 size_t (*old__mbsnrtowcs)(wchar_t *_RESTRICT_KYWD,
68 const char **_RESTRICT_KYWD, size_t, size_t,
69 mbstate_t *_RESTRICT_KYWD);
70 size_t (*old__wcsnrtombs)(char *_RESTRICT_KYWD,
71 const wchar_t **_RESTRICT_KYWD, size_t, size_t,
72 mbstate_t *_RESTRICT_KYWD);
73 static char ctype_encoding[ENCODING_LEN + 1];
74 static _RuneLocale *CachedRuneLocale;
75 static size_t (*Cached__mbrtowc)(wchar_t *_RESTRICT_KYWD,
76 const char *_RESTRICT_KYWD, size_t, mbstate_t *_RESTRICT_KYWD);
77 static size_t (*Cached__wcrtomb)(char *_RESTRICT_KYWD, wchar_t,
78 mbstate_t *_RESTRICT_KYWD);
79 static int (*Cached__mbsinit)(const mbstate_t *);
80 static size_t (*Cached__mbsnrtowcs)(wchar_t *_RESTRICT_KYWD,
81 const char **_RESTRICT_KYWD, size_t, size_t,
82 mbstate_t *_RESTRICT_KYWD);
83 static size_t (*Cached__wcsnrtombs)(char *_RESTRICT_KYWD,
84 const wchar_t **_RESTRICT_KYWD, size_t, size_t,
85 mbstate_t *_RESTRICT_KYWD);
86
87 /*
88 * The "C" and "POSIX" locale are always here.
89 */
90 if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
91 int i;
92
93 (void) memcpy(__ctype, __ctype_C, SZ_TOTAL);
94
95 for (i = 0; i < _CACHED_RUNES; i++) {
96 __ctype_mask[i] = _DefaultRuneLocale.__runetype[i];
97 __trans_upper[i] = _DefaultRuneLocale.__mapupper[i];
98 __trans_lower[i] = _DefaultRuneLocale.__maplower[i];
99 }
100
101 (void) _none_init(&_DefaultRuneLocale);
102 return (0);
103 }
104
105 /*
106 * If the locale name is the same as our cache, use the cache.
107 */
108 if (CachedRuneLocale != NULL &&
109 strcmp(encoding, ctype_encoding) == 0) {
110 _CurrentRuneLocale = CachedRuneLocale;
111 __mbrtowc = Cached__mbrtowc;
112 __mbsinit = Cached__mbsinit;
113 __mbsnrtowcs = Cached__mbsnrtowcs;
114 __wcrtomb = Cached__wcrtomb;
115 __wcsnrtombs = Cached__wcsnrtombs;
116 return (0);
117 }
118
119 /*
120 * Slurp the locale file into the cache.
121 */
122
123 (void) snprintf(name, sizeof (name), "%s/%s/LC_CTYPE/LCL_DATA",
124 _PathLocale, encoding);
125
126 if ((fp = fopen(name, "r")) == NULL)
127 return (errno == 0 ? ENOENT : errno);
128
129 if ((rl = _Read_RuneMagi(fp)) == NULL) {
130 saverr = (errno == 0 ? EINVAL : errno);
131 (void) fclose(fp);
132 return (saverr);
133 }
134 (void) fclose(fp);
135
136 old__mbrtowc = __mbrtowc;
137 old__mbsinit = __mbsinit;
138 old__mbsnrtowcs = __mbsnrtowcs;
139 old__wcrtomb = __wcrtomb;
140 old__wcsnrtombs = __wcsnrtombs;
141
142 __mbrtowc = NULL;
143 __mbsinit = NULL;
144 __mbsnrtowcs = __mbsnrtowcs_std;
145 __wcrtomb = NULL;
146 __wcsnrtombs = __wcsnrtombs_std;
147
148 if (strcmp(rl->__encoding, "NONE") == 0)
149 ret = _none_init(rl);
150 else if (strcmp(rl->__encoding, "UTF-8") == 0)
151 ret = _UTF8_init(rl);
152 else if (strcmp(rl->__encoding, "EUC-CN") == 0)
153 ret = _EUC_CN_init(rl);
154 else if (strcmp(rl->__encoding, "EUC-JP") == 0)
155 ret = _EUC_JP_init(rl);
156 else if (strcmp(rl->__encoding, "EUC-KR") == 0)
157 ret = _EUC_KR_init(rl);
158 else if (strcmp(rl->__encoding, "EUC-TW") == 0)
159 ret = _EUC_TW_init(rl);
160 else if (strcmp(rl->__encoding, "GB18030") == 0)
161 ret = _GB18030_init(rl);
162 else if (strcmp(rl->__encoding, "GB2312") == 0)
163 ret = _GB2312_init(rl);
164 else if (strcmp(rl->__encoding, "GBK") == 0)
165 ret = _GBK_init(rl);
166 else if (strcmp(rl->__encoding, "BIG5") == 0)
167 ret = _BIG5_init(rl);
168 else if (strcmp(rl->__encoding, "MSKanji") == 0)
169 ret = _MSKanji_init(rl);
170 else
171 ret = EINVAL;
172
173 if (ret == 0) {
174 if (CachedRuneLocale != NULL) {
175 free(CachedRuneLocale);
176 }
177 CachedRuneLocale = _CurrentRuneLocale;
178 Cached__mbrtowc = __mbrtowc;
179 Cached__mbsinit = __mbsinit;
180 Cached__mbsnrtowcs = __mbsnrtowcs;
181 Cached__wcrtomb = __wcrtomb;
182 Cached__wcsnrtombs = __wcsnrtombs;
183 (void) strcpy(ctype_encoding, encoding);
184
185 /*
186 * We need to overwrite the _ctype array. This requires
187 * some finagling. This is because references to it may
188 * have been baked into applications.
189 *
190 * Note that it is interesting that toupper/tolower only
191 * produce defined results when the input is representable
192 * as a byte.
193 */
194
195 /*
196 * The top half is the type mask array. Because we
197 * want to support both legacy Solaris code (which have
198 * mask valeus baked in to them), and we want to be able
199 * to import locale files from other sources (FreeBSD)
200 * which probably uses different masks, we have to perform
201 * a conversion here. Ugh. Note that the _CTYPE definitions
202 * we use from FreeBSD are richer than the Solaris legacy.
203 *
204 * We have to cope with these limitations though, because the
205 * inadequate Solaris definitions were baked into binaries.
206 */
207 for (int i = 0; i < _CACHED_RUNES; i++) {
208 /* ctype can only encode the lower 8 bits. */
209 __ctype[i+1] = rl->__runetype[i] & 0xff;
210 __ctype_mask[i] = rl->__runetype[i];
211 }
212
213 /* The bottom half is the toupper/lower array */
214 for (int i = 0; i < _CACHED_RUNES; i++) {
215 __ctype[258 + i] = i;
216 if (rl->__mapupper[i] && rl->__mapupper[i] != i)
217 __ctype[258+i] = rl->__mapupper[i];
218 if (rl->__maplower[i] && rl->__maplower[i] != i)
219 __ctype[258+i] = rl->__maplower[i];
220
221 /* Don't forget these annoyances either! */
222 __trans_upper[i] = rl->__mapupper[i];
223 __trans_lower[i] = rl->__maplower[i];
224 }
225
226 /*
227 * Note that we expect the init code will have populated
228 * the CSWIDTH array (__ctype[514-520]) properly.
229 */
230 } else {
231 __mbrtowc = old__mbrtowc;
232 __mbsinit = old__mbsinit;
233 __mbsnrtowcs = old__mbsnrtowcs;
234 __wcrtomb = old__wcrtomb;
235 __wcsnrtombs = old__wcsnrtombs;
236 free(rl);
237 }
238
239 return (ret);
240 }
241
242 int
243 __wrap_setrunelocale(const char *locale)
244 {
245 int ret = __setrunelocale(locale);
246
247 if (ret != 0) {
248 errno = ret;
249 return (_LDP_ERROR);
250 }
251 return (_LDP_LOADED);
252 }