diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/nls/nls_base.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/nls/nls_base.c')
-rw-r--r-- | fs/nls/nls_base.c | 497 |
1 files changed, 497 insertions, 0 deletions
diff --git a/fs/nls/nls_base.c b/fs/nls/nls_base.c new file mode 100644 index 000000000000..897512796edb --- /dev/null +++ b/fs/nls/nls_base.c | |||
@@ -0,0 +1,497 @@ | |||
1 | /* | ||
2 | * linux/fs/nls_base.c | ||
3 | * | ||
4 | * Native language support--charsets and unicode translations. | ||
5 | * By Gordon Chaffee 1996, 1997 | ||
6 | * | ||
7 | * Unicode based case conversion 1999 by Wolfram Pienkoss | ||
8 | * | ||
9 | */ | ||
10 | |||
11 | #include <linux/module.h> | ||
12 | #include <linux/string.h> | ||
13 | #include <linux/config.h> | ||
14 | #include <linux/nls.h> | ||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/errno.h> | ||
17 | #ifdef CONFIG_KMOD | ||
18 | #include <linux/kmod.h> | ||
19 | #endif | ||
20 | #include <linux/spinlock.h> | ||
21 | |||
22 | static struct nls_table default_table; | ||
23 | static struct nls_table *tables = &default_table; | ||
24 | static DEFINE_SPINLOCK(nls_lock); | ||
25 | |||
26 | /* | ||
27 | * Sample implementation from Unicode home page. | ||
28 | * http://www.stonehand.com/unicode/standard/fss-utf.html | ||
29 | */ | ||
30 | struct utf8_table { | ||
31 | int cmask; | ||
32 | int cval; | ||
33 | int shift; | ||
34 | long lmask; | ||
35 | long lval; | ||
36 | }; | ||
37 | |||
38 | static struct utf8_table utf8_table[] = | ||
39 | { | ||
40 | {0x80, 0x00, 0*6, 0x7F, 0, /* 1 byte sequence */}, | ||
41 | {0xE0, 0xC0, 1*6, 0x7FF, 0x80, /* 2 byte sequence */}, | ||
42 | {0xF0, 0xE0, 2*6, 0xFFFF, 0x800, /* 3 byte sequence */}, | ||
43 | {0xF8, 0xF0, 3*6, 0x1FFFFF, 0x10000, /* 4 byte sequence */}, | ||
44 | {0xFC, 0xF8, 4*6, 0x3FFFFFF, 0x200000, /* 5 byte sequence */}, | ||
45 | {0xFE, 0xFC, 5*6, 0x7FFFFFFF, 0x4000000, /* 6 byte sequence */}, | ||
46 | {0, /* end of table */} | ||
47 | }; | ||
48 | |||
49 | int | ||
50 | utf8_mbtowc(wchar_t *p, const __u8 *s, int n) | ||
51 | { | ||
52 | long l; | ||
53 | int c0, c, nc; | ||
54 | struct utf8_table *t; | ||
55 | |||
56 | nc = 0; | ||
57 | c0 = *s; | ||
58 | l = c0; | ||
59 | for (t = utf8_table; t->cmask; t++) { | ||
60 | nc++; | ||
61 | if ((c0 & t->cmask) == t->cval) { | ||
62 | l &= t->lmask; | ||
63 | if (l < t->lval) | ||
64 | return -1; | ||
65 | *p = l; | ||
66 | return nc; | ||
67 | } | ||
68 | if (n <= nc) | ||
69 | return -1; | ||
70 | s++; | ||
71 | c = (*s ^ 0x80) & 0xFF; | ||
72 | if (c & 0xC0) | ||
73 | return -1; | ||
74 | l = (l << 6) | c; | ||
75 | } | ||
76 | return -1; | ||
77 | } | ||
78 | |||
79 | int | ||
80 | utf8_mbstowcs(wchar_t *pwcs, const __u8 *s, int n) | ||
81 | { | ||
82 | __u16 *op; | ||
83 | const __u8 *ip; | ||
84 | int size; | ||
85 | |||
86 | op = pwcs; | ||
87 | ip = s; | ||
88 | while (*ip && n > 0) { | ||
89 | if (*ip & 0x80) { | ||
90 | size = utf8_mbtowc(op, ip, n); | ||
91 | if (size == -1) { | ||
92 | /* Ignore character and move on */ | ||
93 | ip++; | ||
94 | n--; | ||
95 | } else { | ||
96 | op++; | ||
97 | ip += size; | ||
98 | n -= size; | ||
99 | } | ||
100 | } else { | ||
101 | *op++ = *ip++; | ||
102 | n--; | ||
103 | } | ||
104 | } | ||
105 | return (op - pwcs); | ||
106 | } | ||
107 | |||
108 | int | ||
109 | utf8_wctomb(__u8 *s, wchar_t wc, int maxlen) | ||
110 | { | ||
111 | long l; | ||
112 | int c, nc; | ||
113 | struct utf8_table *t; | ||
114 | |||
115 | if (s == 0) | ||
116 | return 0; | ||
117 | |||
118 | l = wc; | ||
119 | nc = 0; | ||
120 | for (t = utf8_table; t->cmask && maxlen; t++, maxlen--) { | ||
121 | nc++; | ||
122 | if (l <= t->lmask) { | ||
123 | c = t->shift; | ||
124 | *s = t->cval | (l >> c); | ||
125 | while (c > 0) { | ||
126 | c -= 6; | ||
127 | s++; | ||
128 | *s = 0x80 | ((l >> c) & 0x3F); | ||
129 | } | ||
130 | return nc; | ||
131 | } | ||
132 | } | ||
133 | return -1; | ||
134 | } | ||
135 | |||
136 | int | ||
137 | utf8_wcstombs(__u8 *s, const wchar_t *pwcs, int maxlen) | ||
138 | { | ||
139 | const __u16 *ip; | ||
140 | __u8 *op; | ||
141 | int size; | ||
142 | |||
143 | op = s; | ||
144 | ip = pwcs; | ||
145 | while (*ip && maxlen > 0) { | ||
146 | if (*ip > 0x7f) { | ||
147 | size = utf8_wctomb(op, *ip, maxlen); | ||
148 | if (size == -1) { | ||
149 | /* Ignore character and move on */ | ||
150 | maxlen--; | ||
151 | } else { | ||
152 | op += size; | ||
153 | maxlen -= size; | ||
154 | } | ||
155 | } else { | ||
156 | *op++ = (__u8) *ip; | ||
157 | } | ||
158 | ip++; | ||
159 | } | ||
160 | return (op - s); | ||
161 | } | ||
162 | |||
163 | int register_nls(struct nls_table * nls) | ||
164 | { | ||
165 | struct nls_table ** tmp = &tables; | ||
166 | |||
167 | if (!nls) | ||
168 | return -EINVAL; | ||
169 | if (nls->next) | ||
170 | return -EBUSY; | ||
171 | |||
172 | spin_lock(&nls_lock); | ||
173 | while (*tmp) { | ||
174 | if (nls == *tmp) { | ||
175 | spin_unlock(&nls_lock); | ||
176 | return -EBUSY; | ||
177 | } | ||
178 | tmp = &(*tmp)->next; | ||
179 | } | ||
180 | nls->next = tables; | ||
181 | tables = nls; | ||
182 | spin_unlock(&nls_lock); | ||
183 | return 0; | ||
184 | } | ||
185 | |||
186 | int unregister_nls(struct nls_table * nls) | ||
187 | { | ||
188 | struct nls_table ** tmp = &tables; | ||
189 | |||
190 | spin_lock(&nls_lock); | ||
191 | while (*tmp) { | ||
192 | if (nls == *tmp) { | ||
193 | *tmp = nls->next; | ||
194 | spin_unlock(&nls_lock); | ||
195 | return 0; | ||
196 | } | ||
197 | tmp = &(*tmp)->next; | ||
198 | } | ||
199 | spin_unlock(&nls_lock); | ||
200 | return -EINVAL; | ||
201 | } | ||
202 | |||
203 | static struct nls_table *find_nls(char *charset) | ||
204 | { | ||
205 | struct nls_table *nls; | ||
206 | spin_lock(&nls_lock); | ||
207 | for (nls = tables; nls; nls = nls->next) { | ||
208 | if (!strcmp(nls->charset, charset)) | ||
209 | break; | ||
210 | if (nls->alias && !strcmp(nls->alias, charset)) | ||
211 | break; | ||
212 | } | ||
213 | if (nls && !try_module_get(nls->owner)) | ||
214 | nls = NULL; | ||
215 | spin_unlock(&nls_lock); | ||
216 | return nls; | ||
217 | } | ||
218 | |||
219 | struct nls_table *load_nls(char *charset) | ||
220 | { | ||
221 | struct nls_table *nls; | ||
222 | #ifdef CONFIG_KMOD | ||
223 | int ret; | ||
224 | #endif | ||
225 | |||
226 | nls = find_nls(charset); | ||
227 | if (nls) | ||
228 | return nls; | ||
229 | |||
230 | #ifdef CONFIG_KMOD | ||
231 | ret = request_module("nls_%s", charset); | ||
232 | if (ret != 0) { | ||
233 | printk("Unable to load NLS charset %s\n", charset); | ||
234 | return NULL; | ||
235 | } | ||
236 | nls = find_nls(charset); | ||
237 | #endif | ||
238 | return nls; | ||
239 | } | ||
240 | |||
241 | void unload_nls(struct nls_table *nls) | ||
242 | { | ||
243 | module_put(nls->owner); | ||
244 | } | ||
245 | |||
246 | wchar_t charset2uni[256] = { | ||
247 | /* 0x00*/ | ||
248 | 0x0000, 0x0001, 0x0002, 0x0003, | ||
249 | 0x0004, 0x0005, 0x0006, 0x0007, | ||
250 | 0x0008, 0x0009, 0x000a, 0x000b, | ||
251 | 0x000c, 0x000d, 0x000e, 0x000f, | ||
252 | /* 0x10*/ | ||
253 | 0x0010, 0x0011, 0x0012, 0x0013, | ||
254 | 0x0014, 0x0015, 0x0016, 0x0017, | ||
255 | 0x0018, 0x0019, 0x001a, 0x001b, | ||
256 | 0x001c, 0x001d, 0x001e, 0x001f, | ||
257 | /* 0x20*/ | ||
258 | 0x0020, 0x0021, 0x0022, 0x0023, | ||
259 | 0x0024, 0x0025, 0x0026, 0x0027, | ||
260 | 0x0028, 0x0029, 0x002a, 0x002b, | ||
261 | 0x002c, 0x002d, 0x002e, 0x002f, | ||
262 | /* 0x30*/ | ||
263 | 0x0030, 0x0031, 0x0032, 0x0033, | ||
264 | 0x0034, 0x0035, 0x0036, 0x0037, | ||
265 | 0x0038, 0x0039, 0x003a, 0x003b, | ||
266 | 0x003c, 0x003d, 0x003e, 0x003f, | ||
267 | /* 0x40*/ | ||
268 | 0x0040, 0x0041, 0x0042, 0x0043, | ||
269 | 0x0044, 0x0045, 0x0046, 0x0047, | ||
270 | 0x0048, 0x0049, 0x004a, 0x004b, | ||
271 | 0x004c, 0x004d, 0x004e, 0x004f, | ||
272 | /* 0x50*/ | ||
273 | 0x0050, 0x0051, 0x0052, 0x0053, | ||
274 | 0x0054, 0x0055, 0x0056, 0x0057, | ||
275 | 0x0058, 0x0059, 0x005a, 0x005b, | ||
276 | 0x005c, 0x005d, 0x005e, 0x005f, | ||
277 | /* 0x60*/ | ||
278 | 0x0060, 0x0061, 0x0062, 0x0063, | ||
279 | 0x0064, 0x0065, 0x0066, 0x0067, | ||
280 | 0x0068, 0x0069, 0x006a, 0x006b, | ||
281 | 0x006c, 0x006d, 0x006e, 0x006f, | ||
282 | /* 0x70*/ | ||
283 | 0x0070, 0x0071, 0x0072, 0x0073, | ||
284 | 0x0074, 0x0075, 0x0076, 0x0077, | ||
285 | 0x0078, 0x0079, 0x007a, 0x007b, | ||
286 | 0x007c, 0x007d, 0x007e, 0x007f, | ||
287 | /* 0x80*/ | ||
288 | 0x0080, 0x0081, 0x0082, 0x0083, | ||
289 | 0x0084, 0x0085, 0x0086, 0x0087, | ||
290 | 0x0088, 0x0089, 0x008a, 0x008b, | ||
291 | 0x008c, 0x008d, 0x008e, 0x008f, | ||
292 | /* 0x90*/ | ||
293 | 0x0090, 0x0091, 0x0092, 0x0093, | ||
294 | 0x0094, 0x0095, 0x0096, 0x0097, | ||
295 | 0x0098, 0x0099, 0x009a, 0x009b, | ||
296 | 0x009c, 0x009d, 0x009e, 0x009f, | ||
297 | /* 0xa0*/ | ||
298 | 0x00a0, 0x00a1, 0x00a2, 0x00a3, | ||
299 | 0x00a4, 0x00a5, 0x00a6, 0x00a7, | ||
300 | 0x00a8, 0x00a9, 0x00aa, 0x00ab, | ||
301 | 0x00ac, 0x00ad, 0x00ae, 0x00af, | ||
302 | /* 0xb0*/ | ||
303 | 0x00b0, 0x00b1, 0x00b2, 0x00b3, | ||
304 | 0x00b4, 0x00b5, 0x00b6, 0x00b7, | ||
305 | 0x00b8, 0x00b9, 0x00ba, 0x00bb, | ||
306 | 0x00bc, 0x00bd, 0x00be, 0x00bf, | ||
307 | /* 0xc0*/ | ||
308 | 0x00c0, 0x00c1, 0x00c2, 0x00c3, | ||
309 | 0x00c4, 0x00c5, 0x00c6, 0x00c7, | ||
310 | 0x00c8, 0x00c9, 0x00ca, 0x00cb, | ||
311 | 0x00cc, 0x00cd, 0x00ce, 0x00cf, | ||
312 | /* 0xd0*/ | ||
313 | 0x00d0, 0x00d1, 0x00d2, 0x00d3, | ||
314 | 0x00d4, 0x00d5, 0x00d6, 0x00d7, | ||
315 | 0x00d8, 0x00d9, 0x00da, 0x00db, | ||
316 | 0x00dc, 0x00dd, 0x00de, 0x00df, | ||
317 | /* 0xe0*/ | ||
318 | 0x00e0, 0x00e1, 0x00e2, 0x00e3, | ||
319 | 0x00e4, 0x00e5, 0x00e6, 0x00e7, | ||
320 | 0x00e8, 0x00e9, 0x00ea, 0x00eb, | ||
321 | 0x00ec, 0x00ed, 0x00ee, 0x00ef, | ||
322 | /* 0xf0*/ | ||
323 | 0x00f0, 0x00f1, 0x00f2, 0x00f3, | ||
324 | 0x00f4, 0x00f5, 0x00f6, 0x00f7, | ||
325 | 0x00f8, 0x00f9, 0x00fa, 0x00fb, | ||
326 | 0x00fc, 0x00fd, 0x00fe, 0x00ff, | ||
327 | }; | ||
328 | |||
329 | static unsigned char page00[256] = { | ||
330 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */ | ||
331 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */ | ||
332 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */ | ||
333 | 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */ | ||
334 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */ | ||
335 | 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */ | ||
336 | 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */ | ||
337 | 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */ | ||
338 | 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */ | ||
339 | 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */ | ||
340 | 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */ | ||
341 | 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */ | ||
342 | 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */ | ||
343 | 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */ | ||
344 | 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */ | ||
345 | 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */ | ||
346 | |||
347 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */ | ||
348 | 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */ | ||
349 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */ | ||
350 | 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */ | ||
351 | 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */ | ||
352 | 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */ | ||
353 | 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */ | ||
354 | 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */ | ||
355 | 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */ | ||
356 | 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */ | ||
357 | 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */ | ||
358 | 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */ | ||
359 | 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */ | ||
360 | 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */ | ||
361 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */ | ||
362 | 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */ | ||
363 | }; | ||
364 | |||
365 | static unsigned char *page_uni2charset[256] = { | ||
366 | page00 | ||
367 | }; | ||
368 | |||
369 | static unsigned char charset2lower[256] = { | ||
370 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */ | ||
371 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */ | ||
372 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */ | ||
373 | 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */ | ||
374 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */ | ||
375 | 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */ | ||
376 | 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */ | ||
377 | 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */ | ||
378 | 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x40-0x47 */ | ||
379 | 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x48-0x4f */ | ||
380 | 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x50-0x57 */ | ||
381 | 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */ | ||
382 | 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */ | ||
383 | 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */ | ||
384 | 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */ | ||
385 | 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */ | ||
386 | |||
387 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */ | ||
388 | 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */ | ||
389 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */ | ||
390 | 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */ | ||
391 | 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */ | ||
392 | 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */ | ||
393 | 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */ | ||
394 | 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */ | ||
395 | 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */ | ||
396 | 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */ | ||
397 | 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */ | ||
398 | 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */ | ||
399 | 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */ | ||
400 | 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */ | ||
401 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */ | ||
402 | 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */ | ||
403 | }; | ||
404 | |||
405 | static unsigned char charset2upper[256] = { | ||
406 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */ | ||
407 | 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */ | ||
408 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */ | ||
409 | 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */ | ||
410 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */ | ||
411 | 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */ | ||
412 | 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */ | ||
413 | 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */ | ||
414 | 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */ | ||
415 | 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */ | ||
416 | 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */ | ||
417 | 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */ | ||
418 | 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x60-0x67 */ | ||
419 | 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x68-0x6f */ | ||
420 | 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x70-0x77 */ | ||
421 | 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */ | ||
422 | |||
423 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */ | ||
424 | 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */ | ||
425 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */ | ||
426 | 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */ | ||
427 | 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */ | ||
428 | 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */ | ||
429 | 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */ | ||
430 | 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */ | ||
431 | 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */ | ||
432 | 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */ | ||
433 | 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */ | ||
434 | 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */ | ||
435 | 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */ | ||
436 | 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */ | ||
437 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */ | ||
438 | 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */ | ||
439 | }; | ||
440 | |||
441 | |||
442 | static int uni2char(wchar_t uni, unsigned char *out, int boundlen) | ||
443 | { | ||
444 | unsigned char *uni2charset; | ||
445 | unsigned char cl = uni & 0x00ff; | ||
446 | unsigned char ch = (uni & 0xff00) >> 8; | ||
447 | |||
448 | if (boundlen <= 0) | ||
449 | return -ENAMETOOLONG; | ||
450 | |||
451 | uni2charset = page_uni2charset[ch]; | ||
452 | if (uni2charset && uni2charset[cl]) | ||
453 | out[0] = uni2charset[cl]; | ||
454 | else | ||
455 | return -EINVAL; | ||
456 | return 1; | ||
457 | } | ||
458 | |||
459 | static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni) | ||
460 | { | ||
461 | *uni = charset2uni[*rawstring]; | ||
462 | if (*uni == 0x0000) | ||
463 | return -EINVAL; | ||
464 | return 1; | ||
465 | } | ||
466 | |||
467 | static struct nls_table default_table = { | ||
468 | .charset = "default", | ||
469 | .uni2char = uni2char, | ||
470 | .char2uni = char2uni, | ||
471 | .charset2lower = charset2lower, | ||
472 | .charset2upper = charset2upper, | ||
473 | }; | ||
474 | |||
475 | /* Returns a simple default translation table */ | ||
476 | struct nls_table *load_nls_default(void) | ||
477 | { | ||
478 | struct nls_table *default_nls; | ||
479 | |||
480 | default_nls = load_nls(CONFIG_NLS_DEFAULT); | ||
481 | if (default_nls != NULL) | ||
482 | return default_nls; | ||
483 | else | ||
484 | return &default_table; | ||
485 | } | ||
486 | |||
487 | EXPORT_SYMBOL(register_nls); | ||
488 | EXPORT_SYMBOL(unregister_nls); | ||
489 | EXPORT_SYMBOL(unload_nls); | ||
490 | EXPORT_SYMBOL(load_nls); | ||
491 | EXPORT_SYMBOL(load_nls_default); | ||
492 | EXPORT_SYMBOL(utf8_mbtowc); | ||
493 | EXPORT_SYMBOL(utf8_mbstowcs); | ||
494 | EXPORT_SYMBOL(utf8_wctomb); | ||
495 | EXPORT_SYMBOL(utf8_wcstombs); | ||
496 | |||
497 | MODULE_LICENSE("Dual BSD/GPL"); | ||