ReactOS  0.4.14-dev-614-gbfd8a84
nls_base.c
Go to the documentation of this file.
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 struct nls_table *tables;
24 
25 /*
26  * Sample implementation from Unicode home page.
27  * http://www.stonehand.com/unicode/standard/fss-utf.html
28  */
29 struct utf8_table {
30  int cmask;
31  int cval;
32  int shift;
33  long lmask;
34  long lval;
35 };
36 
37 static struct utf8_table utf8_table[] =
38 {
39  {0x80, 0x00, 0*6, 0x7F, 0, /* 1 byte sequence */},
40  {0xE0, 0xC0, 1*6, 0x7FF, 0x80, /* 2 byte sequence */},
41  {0xF0, 0xE0, 2*6, 0xFFFF, 0x800, /* 3 byte sequence */},
42  {0xF8, 0xF0, 3*6, 0x1FFFFF, 0x10000, /* 4 byte sequence */},
43  {0xFC, 0xF8, 4*6, 0x3FFFFFF, 0x200000, /* 5 byte sequence */},
44  {0xFE, 0xFC, 5*6, 0x7FFFFFFF, 0x4000000, /* 6 byte sequence */},
45  {0, /* end of table */}
46 };
47 
48 int
49 utf8_mbtowc(wchar_t *p, const __u8 *s, int n)
50 {
51  long l;
52  int c0, c, nc;
53  struct utf8_table *t;
54 
55  nc = 0;
56  c0 = *s;
57  l = c0;
58  for (t = utf8_table; t->cmask; t++) {
59  nc++;
60  if ((c0 & t->cmask) == t->cval) {
61  l &= t->lmask;
62  if (l < t->lval)
63  return -1;
64  *p = (wchar_t)l;
65  return nc;
66  }
67  if (n <= nc)
68  return -1;
69  s++;
70  c = (*s ^ 0x80) & 0xFF;
71  if (c & 0xC0)
72  return -1;
73  l = (l << 6) | c;
74  }
75  return -1;
76 }
77 
78 int
79 utf8_mbstowcs(wchar_t *pwcs, const __u8 *s, int n)
80 {
81  __u16 *op;
82  const __u8 *ip;
83  int size;
84 
85  op = pwcs;
86  ip = s;
87  while (*ip && n > 0) {
88  if (*ip & 0x80) {
89  size = utf8_mbtowc(op, ip, n);
90  if (size == -1) {
91  /* Ignore character and move on */
92  ip++;
93  n--;
94  } else {
95  op++;
96  ip += size;
97  n -= size;
98  }
99  } else {
100  *op++ = *ip++;
101  n--;
102  }
103  }
104  return (int)(op - pwcs);
105 }
106 
107 int
108 utf8_wctomb(__u8 *s, wchar_t wc, int maxlen)
109 {
110  long l;
111  int c, nc;
112  struct utf8_table *t;
113 
114  if (s == 0)
115  return 0;
116 
117  l = wc;
118  nc = 0;
119  for (t = utf8_table; t->cmask && maxlen; t++, maxlen--) {
120  nc++;
121  if (l <= t->lmask) {
122  c = t->shift;
123  *s = (__u8)(t->cval | (l >> c));
124  while (c > 0) {
125  c -= 6;
126  s++;
127  *s = 0x80 | (__u8)((l >> c) & 0x3F);
128  }
129  return nc;
130  }
131  }
132  return -1;
133 }
134 
135 int
136 utf8_wcstombs(__u8 *s, const wchar_t *pwcs, int maxlen)
137 {
138  const __u16 *ip;
139  __u8 *op;
140  int size;
141 
142  op = s;
143  ip = pwcs;
144  while (*ip && maxlen > 0) {
145  if (*ip > 0x7f) {
146  size = utf8_wctomb(op, *ip, maxlen);
147  if (size == -1) {
148  /* Ignore character and move on */
149  maxlen--;
150  } else {
151  op += size;
152  maxlen -= size;
153  }
154  } else {
155  *op++ = (__u8) *ip;
156  }
157  ip++;
158  }
159  return (int)(op - s);
160 }
161 
163 {
164  struct nls_table ** tmp = &tables;
165 
166  if (!nls)
167  return -EINVAL;
168  if (nls->next)
169  return -EBUSY;
170 
172  while (*tmp) {
173  if (nls == *tmp) {
175  return -EBUSY;
176  }
177  tmp = &(*tmp)->next;
178  }
179  nls->next = tables;
180  tables = nls;
182  return 0;
183 }
184 
186 {
187  struct nls_table ** tmp = &tables;
188 
190  while (*tmp) {
191  if (nls == *tmp) {
192  *tmp = nls->next;
194  return 0;
195  }
196  tmp = &(*tmp)->next;
197  }
199  return -EINVAL;
200 }
201 
202 static struct nls_table *find_nls(char *charset)
203 {
204  struct nls_table *nls;
206  for (nls = tables; nls; nls = nls->next) {
207  if (!strcmp(nls->charset, charset))
208  break;
209  if (nls->alias && !strcmp(nls->alias, charset))
210  break;
211  }
212  if (nls && !try_module_get(nls->owner))
213  nls = NULL;
215  return nls;
216 }
217 
218 struct nls_table *load_nls(char *charset)
219 {
220  struct nls_table *nls;
221 #ifdef CONFIG_KMOD
222  int ret;
223 #endif
224 
225  nls = find_nls(charset);
226  if (nls)
227  return nls;
228 
229 #ifdef CONFIG_KMOD
230  ret = request_module("nls_%s", charset);
231  if (ret != 0) {
232  printk("Unable to load NLS charset %s\n", charset);
233  return NULL;
234  }
235  nls = find_nls(charset);
236 #endif
237  return nls;
238 }
239 
240 void unload_nls(struct nls_table *nls)
241 {
242  module_put(nls->owner);
243 }
244 
245 wchar_t charset2uni[256] = {
246  /* 0x00*/
247  0x0000, 0x0001, 0x0002, 0x0003,
248  0x0004, 0x0005, 0x0006, 0x0007,
249  0x0008, 0x0009, 0x000a, 0x000b,
250  0x000c, 0x000d, 0x000e, 0x000f,
251  /* 0x10*/
252  0x0010, 0x0011, 0x0012, 0x0013,
253  0x0014, 0x0015, 0x0016, 0x0017,
254  0x0018, 0x0019, 0x001a, 0x001b,
255  0x001c, 0x001d, 0x001e, 0x001f,
256  /* 0x20*/
257  0x0020, 0x0021, 0x0022, 0x0023,
258  0x0024, 0x0025, 0x0026, 0x0027,
259  0x0028, 0x0029, 0x002a, 0x002b,
260  0x002c, 0x002d, 0x002e, 0x002f,
261  /* 0x30*/
262  0x0030, 0x0031, 0x0032, 0x0033,
263  0x0034, 0x0035, 0x0036, 0x0037,
264  0x0038, 0x0039, 0x003a, 0x003b,
265  0x003c, 0x003d, 0x003e, 0x003f,
266  /* 0x40*/
267  0x0040, 0x0041, 0x0042, 0x0043,
268  0x0044, 0x0045, 0x0046, 0x0047,
269  0x0048, 0x0049, 0x004a, 0x004b,
270  0x004c, 0x004d, 0x004e, 0x004f,
271  /* 0x50*/
272  0x0050, 0x0051, 0x0052, 0x0053,
273  0x0054, 0x0055, 0x0056, 0x0057,
274  0x0058, 0x0059, 0x005a, 0x005b,
275  0x005c, 0x005d, 0x005e, 0x005f,
276  /* 0x60*/
277  0x0060, 0x0061, 0x0062, 0x0063,
278  0x0064, 0x0065, 0x0066, 0x0067,
279  0x0068, 0x0069, 0x006a, 0x006b,
280  0x006c, 0x006d, 0x006e, 0x006f,
281  /* 0x70*/
282  0x0070, 0x0071, 0x0072, 0x0073,
283  0x0074, 0x0075, 0x0076, 0x0077,
284  0x0078, 0x0079, 0x007a, 0x007b,
285  0x007c, 0x007d, 0x007e, 0x007f,
286  /* 0x80*/
287  0x0080, 0x0081, 0x0082, 0x0083,
288  0x0084, 0x0085, 0x0086, 0x0087,
289  0x0088, 0x0089, 0x008a, 0x008b,
290  0x008c, 0x008d, 0x008e, 0x008f,
291  /* 0x90*/
292  0x0090, 0x0091, 0x0092, 0x0093,
293  0x0094, 0x0095, 0x0096, 0x0097,
294  0x0098, 0x0099, 0x009a, 0x009b,
295  0x009c, 0x009d, 0x009e, 0x009f,
296  /* 0xa0*/
297  0x00a0, 0x00a1, 0x00a2, 0x00a3,
298  0x00a4, 0x00a5, 0x00a6, 0x00a7,
299  0x00a8, 0x00a9, 0x00aa, 0x00ab,
300  0x00ac, 0x00ad, 0x00ae, 0x00af,
301  /* 0xb0*/
302  0x00b0, 0x00b1, 0x00b2, 0x00b3,
303  0x00b4, 0x00b5, 0x00b6, 0x00b7,
304  0x00b8, 0x00b9, 0x00ba, 0x00bb,
305  0x00bc, 0x00bd, 0x00be, 0x00bf,
306  /* 0xc0*/
307  0x00c0, 0x00c1, 0x00c2, 0x00c3,
308  0x00c4, 0x00c5, 0x00c6, 0x00c7,
309  0x00c8, 0x00c9, 0x00ca, 0x00cb,
310  0x00cc, 0x00cd, 0x00ce, 0x00cf,
311  /* 0xd0*/
312  0x00d0, 0x00d1, 0x00d2, 0x00d3,
313  0x00d4, 0x00d5, 0x00d6, 0x00d7,
314  0x00d8, 0x00d9, 0x00da, 0x00db,
315  0x00dc, 0x00dd, 0x00de, 0x00df,
316  /* 0xe0*/
317  0x00e0, 0x00e1, 0x00e2, 0x00e3,
318  0x00e4, 0x00e5, 0x00e6, 0x00e7,
319  0x00e8, 0x00e9, 0x00ea, 0x00eb,
320  0x00ec, 0x00ed, 0x00ee, 0x00ef,
321  /* 0xf0*/
322  0x00f0, 0x00f1, 0x00f2, 0x00f3,
323  0x00f4, 0x00f5, 0x00f6, 0x00f7,
324  0x00f8, 0x00f9, 0x00fa, 0x00fb,
325  0x00fc, 0x00fd, 0x00fe, 0x00ff,
326 };
327 
328 static unsigned char page00[256] = {
329  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
330  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
331  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
332  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
333  0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
334  0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
335  0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
336  0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
337  0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
338  0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
339  0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
340  0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
341  0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
342  0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
343  0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
344  0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
345 
346  0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
347  0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
348  0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
349  0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
350  0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
351  0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
352  0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
353  0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
354  0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
355  0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
356  0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
357  0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
358  0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
359  0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
360  0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
361  0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
362 };
363 
364 static unsigned char *page_uni2charset[256] = {
365  page00
366 };
367 
368 static unsigned char charset2lower[256] = {
369  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
370  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
371  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
372  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
373  0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
374  0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
375  0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
376  0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
377  0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x40-0x47 */
378  0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x48-0x4f */
379  0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x50-0x57 */
380  0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
381  0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
382  0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
383  0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
384  0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
385 
386  0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
387  0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
388  0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
389  0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
390  0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
391  0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
392  0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
393  0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
394  0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
395  0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
396  0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
397  0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
398  0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
399  0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
400  0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
401  0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
402 };
403 
404 static unsigned char charset2upper[256] = {
405  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
406  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
407  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
408  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
409  0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
410  0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
411  0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
412  0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
413  0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
414  0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
415  0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
416  0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
417  0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x60-0x67 */
418  0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x68-0x6f */
419  0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x70-0x77 */
420  0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
421 
422  0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
423  0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
424  0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
425  0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
426  0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
427  0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
428  0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
429  0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
430  0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
431  0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
432  0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
433  0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
434  0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
435  0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
436  0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
437  0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
438 };
439 
440 
441 static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
442 {
443  unsigned char *uni2charset;
444  unsigned char cl = uni & 0x00ff;
445  unsigned char ch = (uni & 0xff00) >> 8;
446 
447  if (boundlen <= 0)
448  return -ENAMETOOLONG;
449 
450  uni2charset = page_uni2charset[ch];
451  if (uni2charset && uni2charset[cl])
452  out[0] = uni2charset[cl];
453  else
454  return -EINVAL;
455  return 1;
456 }
457 
458 static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
459 {
460  *uni = charset2uni[*rawstring];
461  if (*uni == 0x0000)
462  return -EINVAL;
463  return 1;
464 }
465 
466 #if 0 // Masked by Matt
467 
468 static struct nls_table default_table = {
469  /* .charset */ "default",
470  /* .alias */ 0,
471  /* .uni2char */ uni2char,
472  /* .char2uni */ char2uni,
473  /* .charset2lower */ charset2lower,
474  /* .charset2upper */ charset2upper,
475  /* .owner */ 0
476 };
477 
478 /* Returns a simple default translation table */
479 struct nls_table *load_nls_default(void)
480 {
481  struct nls_table *default_nls;
482 
483  default_nls = load_nls(CONFIG_NLS_DEFAULT);
484  if (default_nls != NULL)
485  return default_nls;
486  else
487  return &default_table;
488 }
489 
490 #endif
491 
501 
502 MODULE_LICENSE("Dual BSD/GPL");
unsigned char __u8
Definition: compat.h:88
int utf8_mbstowcs(wchar_t *pwcs, const __u8 *s, int n)
Definition: nls_base.c:79
CFF_Charset charset
Definition: cffcmap.c:138
struct nls_table * next
Definition: module.h:1040
Definition: arc.h:39
Definition: arc.h:37
GLdouble n
Definition: glext.h:7729
GLdouble GLdouble t
Definition: gl.h:2047
int utf8_wctomb(__u8 *s, wchar_t wc, int maxlen)
Definition: nls_base.c:108
#define spin_lock(sl)
Definition: module.h:304
int utf8_mbtowc(wchar_t *p, const __u8 *s, int n)
Definition: nls_base.c:49
struct nls_table * load_nls_default(void)
struct nls_table * load_nls(char *charset)
Definition: nls_base.c:218
int ip[4]
Definition: rtl.c:1176
static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
Definition: nls_base.c:458
#define nls
Definition: kernel32.h:13
smooth NULL
Definition: ftsmooth.c:416
spinlock_t nls_lock
Definition: nls_base.c:23
long lmask
Definition: nls_base.c:33
static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
Definition: nls_base.c:441
MODULE_LICENSE("Dual BSD/GPL")
r l[0]
Definition: byte_order.h:167
wchar_t charset2uni[256]
Definition: nls_base.c:245
asmlinkage int printk(const char *fmt,...)
Definition: output.c:76
GLsizeiptr size
Definition: glext.h:5919
unsigned short __u16
Definition: compat.h:89
Definition: dhcpd.h:61
int utf8_wcstombs(__u8 *s, const wchar_t *pwcs, int maxlen)
Definition: nls_base.c:136
const GLubyte * c
Definition: glext.h:8905
static FILE * out
Definition: regtests2xml.c:44
#define try_module_get(x)
Definition: module.h:273
static struct nls_table * find_nls(char *charset)
Definition: nls_base.c:202
static unsigned char charset2upper[256]
Definition: nls_base.c:404
int ret
void unload_nls(struct nls_table *nls)
Definition: nls_base.c:240
static unsigned char page00[256]
Definition: nls_base.c:328
int shift
Definition: nls_base.c:32
GLdouble s
Definition: gl.h:2039
#define module_put(x)
Definition: module.h:274
#define spin_unlock(sl)
Definition: module.h:305
int register_nls(struct nls_table *nls)
Definition: nls_base.c:162
int cmask
Definition: nls_base.c:30
struct define * next
Definition: compiler.c:65
int unregister_nls(struct nls_table *nls)
Definition: nls_base.c:185
#define c
Definition: ke_i.h:80
#define wchar_t
Definition: wchar.h:102
struct nls_table * tables
Definition: nls_base.c:22
int strcmp(const char *String1, const char *String2)
Definition: utclib.c:469
static unsigned char charset2lower[256]
Definition: nls_base.c:368
UINT op
Definition: effect.c:223
EXPORT_SYMBOL(register_nls)
static unsigned char * page_uni2charset[256]
Definition: nls_base.c:364
GLfloat GLfloat p
Definition: glext.h:8902
int cval
Definition: nls_base.c:31
long lval
Definition: nls_base.c:34