nls_base.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:14k
- /*
- * linux/fs/nls.c
- *
- * Native language support--charsets and unicode translations.
- * By Gordon Chaffee 1996, 1997
- *
- * Unicode based case conversion 1999 by Wolfram Pienkoss
- *
- */
- #include <linux/version.h>
- #include <linux/module.h>
- #include <linux/string.h>
- #include <linux/config.h>
- #include <linux/nls.h>
- #include <linux/slab.h>
- #include <linux/errno.h>
- #ifdef CONFIG_KMOD
- #include <linux/kmod.h>
- #endif
- #include <linux/spinlock.h>
- static struct nls_table *tables;
- static spinlock_t nls_lock = SPIN_LOCK_UNLOCKED;
- /*
- * Sample implementation from Unicode home page.
- * http://www.stonehand.com/unicode/standard/fss-utf.html
- */
- struct utf8_table {
- int cmask;
- int cval;
- int shift;
- long lmask;
- long lval;
- };
- static struct utf8_table utf8_table[] =
- {
- {0x80, 0x00, 0*6, 0x7F, 0, /* 1 byte sequence */},
- {0xE0, 0xC0, 1*6, 0x7FF, 0x80, /* 2 byte sequence */},
- {0xF0, 0xE0, 2*6, 0xFFFF, 0x800, /* 3 byte sequence */},
- {0xF8, 0xF0, 3*6, 0x1FFFFF, 0x10000, /* 4 byte sequence */},
- {0xFC, 0xF8, 4*6, 0x3FFFFFF, 0x200000, /* 5 byte sequence */},
- {0xFE, 0xFC, 5*6, 0x7FFFFFFF, 0x4000000, /* 6 byte sequence */},
- {0, /* end of table */}
- };
- int
- utf8_mbtowc(wchar_t *p, const __u8 *s, int n)
- {
- long l;
- int c0, c, nc;
- struct utf8_table *t;
-
- nc = 0;
- c0 = *s;
- l = c0;
- for (t = utf8_table; t->cmask; t++) {
- nc++;
- if ((c0 & t->cmask) == t->cval) {
- l &= t->lmask;
- if (l < t->lval)
- return -1;
- *p = l;
- return nc;
- }
- if (n <= nc)
- return -1;
- s++;
- c = (*s ^ 0x80) & 0xFF;
- if (c & 0xC0)
- return -1;
- l = (l << 6) | c;
- }
- return -1;
- }
- int
- utf8_mbstowcs(wchar_t *pwcs, const __u8 *s, int n)
- {
- __u16 *op;
- const __u8 *ip;
- int size;
- op = pwcs;
- ip = s;
- while (*ip && n > 0) {
- if (*ip & 0x80) {
- size = utf8_mbtowc(op, ip, n);
- if (size == -1) {
- /* Ignore character and move on */
- ip++;
- n--;
- } else {
- op += size;
- ip += size;
- n -= size;
- }
- } else {
- *op++ = *ip++;
- }
- }
- return (op - pwcs);
- }
- int
- utf8_wctomb(__u8 *s, wchar_t wc, int maxlen)
- {
- long l;
- int c, nc;
- struct utf8_table *t;
-
- if (s == 0)
- return 0;
-
- l = wc;
- nc = 0;
- for (t = utf8_table; t->cmask && maxlen; t++, maxlen--) {
- nc++;
- if (l <= t->lmask) {
- c = t->shift;
- *s = t->cval | (l >> c);
- while (c > 0) {
- c -= 6;
- s++;
- *s = 0x80 | ((l >> c) & 0x3F);
- }
- return nc;
- }
- }
- return -1;
- }
- int
- utf8_wcstombs(__u8 *s, const wchar_t *pwcs, int maxlen)
- {
- const __u16 *ip;
- __u8 *op;
- int size;
- op = s;
- ip = pwcs;
- while (*ip && maxlen > 0) {
- if (*ip > 0x7f) {
- size = utf8_wctomb(op, *ip, maxlen);
- if (size == -1) {
- /* Ignore character and move on */
- maxlen--;
- } else {
- op += size;
- maxlen -= size;
- }
- } else {
- *op++ = (__u8) *ip;
- }
- ip++;
- }
- return (op - s);
- }
- int register_nls(struct nls_table * nls)
- {
- struct nls_table ** tmp = &tables;
- if (!nls)
- return -EINVAL;
- if (nls->next)
- return -EBUSY;
- spin_lock(&nls_lock);
- while (*tmp) {
- if (nls == *tmp) {
- spin_unlock(&nls_lock);
- return -EBUSY;
- }
- tmp = &(*tmp)->next;
- }
- nls->next = tables;
- tables = nls;
- spin_unlock(&nls_lock);
- return 0;
- }
- int unregister_nls(struct nls_table * nls)
- {
- struct nls_table ** tmp = &tables;
- spin_lock(&nls_lock);
- while (*tmp) {
- if (nls == *tmp) {
- *tmp = nls->next;
- spin_unlock(&nls_lock);
- return 0;
- }
- tmp = &(*tmp)->next;
- }
- spin_unlock(&nls_lock);
- return -EINVAL;
- }
- static struct nls_table *find_nls(char *charset)
- {
- struct nls_table *nls;
- spin_lock(&nls_lock);
- for (nls = tables; nls; nls = nls->next)
- if (! strcmp(nls->charset, charset))
- break;
- if (nls && !try_inc_mod_count(nls->owner))
- nls = NULL;
- spin_unlock(&nls_lock);
- return nls;
- }
- struct nls_table *load_nls(char *charset)
- {
- struct nls_table *nls;
- #ifdef CONFIG_KMOD
- char buf[40];
- int ret;
- #endif
- nls = find_nls(charset);
- if (nls)
- return nls;
- #ifdef CONFIG_KMOD
- if (strlen(charset) > sizeof(buf) - sizeof("nls_")) {
- printk("Unable to load NLS charset %s: name too longn",
- charset);
- return NULL;
- }
-
- sprintf(buf, "nls_%s", charset);
- ret = request_module(buf);
- if (ret != 0) {
- printk("Unable to load NLS charset %sn", charset);
- return NULL;
- }
- nls = find_nls(charset);
- #endif
- return nls;
- }
- void unload_nls(struct nls_table *nls)
- {
- if (nls->owner)
- __MOD_DEC_USE_COUNT(nls->owner);
- }
- wchar_t charset2uni[256] = {
- /* 0x00*/
- 0x0000, 0x0001, 0x0002, 0x0003,
- 0x0004, 0x0005, 0x0006, 0x0007,
- 0x0008, 0x0009, 0x000a, 0x000b,
- 0x000c, 0x000d, 0x000e, 0x000f,
- /* 0x10*/
- 0x0010, 0x0011, 0x0012, 0x0013,
- 0x0014, 0x0015, 0x0016, 0x0017,
- 0x0018, 0x0019, 0x001a, 0x001b,
- 0x001c, 0x001d, 0x001e, 0x001f,
- /* 0x20*/
- 0x0020, 0x0021, 0x0022, 0x0023,
- 0x0024, 0x0025, 0x0026, 0x0027,
- 0x0028, 0x0029, 0x002a, 0x002b,
- 0x002c, 0x002d, 0x002e, 0x002f,
- /* 0x30*/
- 0x0030, 0x0031, 0x0032, 0x0033,
- 0x0034, 0x0035, 0x0036, 0x0037,
- 0x0038, 0x0039, 0x003a, 0x003b,
- 0x003c, 0x003d, 0x003e, 0x003f,
- /* 0x40*/
- 0x0040, 0x0041, 0x0042, 0x0043,
- 0x0044, 0x0045, 0x0046, 0x0047,
- 0x0048, 0x0049, 0x004a, 0x004b,
- 0x004c, 0x004d, 0x004e, 0x004f,
- /* 0x50*/
- 0x0050, 0x0051, 0x0052, 0x0053,
- 0x0054, 0x0055, 0x0056, 0x0057,
- 0x0058, 0x0059, 0x005a, 0x005b,
- 0x005c, 0x005d, 0x005e, 0x005f,
- /* 0x60*/
- 0x0060, 0x0061, 0x0062, 0x0063,
- 0x0064, 0x0065, 0x0066, 0x0067,
- 0x0068, 0x0069, 0x006a, 0x006b,
- 0x006c, 0x006d, 0x006e, 0x006f,
- /* 0x70*/
- 0x0070, 0x0071, 0x0072, 0x0073,
- 0x0074, 0x0075, 0x0076, 0x0077,
- 0x0078, 0x0079, 0x007a, 0x007b,
- 0x007c, 0x007d, 0x007e, 0x007f,
- /* 0x80*/
- 0x0080, 0x0081, 0x0082, 0x0083,
- 0x0084, 0x0085, 0x0086, 0x0087,
- 0x0088, 0x0089, 0x008a, 0x008b,
- 0x008c, 0x008d, 0x008e, 0x008f,
- /* 0x90*/
- 0x0090, 0x0091, 0x0092, 0x0093,
- 0x0094, 0x0095, 0x0096, 0x0097,
- 0x0098, 0x0099, 0x009a, 0x009b,
- 0x009c, 0x009d, 0x009e, 0x009f,
- /* 0xa0*/
- 0x00a0, 0x00a1, 0x00a2, 0x00a3,
- 0x00a4, 0x00a5, 0x00a6, 0x00a7,
- 0x00a8, 0x00a9, 0x00aa, 0x00ab,
- 0x00ac, 0x00ad, 0x00ae, 0x00af,
- /* 0xb0*/
- 0x00b0, 0x00b1, 0x00b2, 0x00b3,
- 0x00b4, 0x00b5, 0x00b6, 0x00b7,
- 0x00b8, 0x00b9, 0x00ba, 0x00bb,
- 0x00bc, 0x00bd, 0x00be, 0x00bf,
- /* 0xc0*/
- 0x00c0, 0x00c1, 0x00c2, 0x00c3,
- 0x00c4, 0x00c5, 0x00c6, 0x00c7,
- 0x00c8, 0x00c9, 0x00ca, 0x00cb,
- 0x00cc, 0x00cd, 0x00ce, 0x00cf,
- /* 0xd0*/
- 0x00d0, 0x00d1, 0x00d2, 0x00d3,
- 0x00d4, 0x00d5, 0x00d6, 0x00d7,
- 0x00d8, 0x00d9, 0x00da, 0x00db,
- 0x00dc, 0x00dd, 0x00de, 0x00df,
- /* 0xe0*/
- 0x00e0, 0x00e1, 0x00e2, 0x00e3,
- 0x00e4, 0x00e5, 0x00e6, 0x00e7,
- 0x00e8, 0x00e9, 0x00ea, 0x00eb,
- 0x00ec, 0x00ed, 0x00ee, 0x00ef,
- /* 0xf0*/
- 0x00f0, 0x00f1, 0x00f2, 0x00f3,
- 0x00f4, 0x00f5, 0x00f6, 0x00f7,
- 0x00f8, 0x00f9, 0x00fa, 0x00fb,
- 0x00fc, 0x00fd, 0x00fe, 0x00ff,
- };
- static unsigned char page00[256] = {
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
- 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
- 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
- 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
- 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
- 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
- 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
- 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
- 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
- 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
- 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
- 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
- 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
- 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
- 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
- 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
- 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
- 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
- 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
- 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
- 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
- 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
- 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
- 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
- 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
- };
- static unsigned char *page_uni2charset[256] = {
- page00
- };
- static unsigned char charset2lower[256] = {
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
- 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
- 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
- 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
- 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
- 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
- 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x40-0x47 */
- 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x48-0x4f */
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x50-0x57 */
- 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
- 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
- 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
- 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
- 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
- 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
- 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
- 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
- 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
- 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
- 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
- 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
- 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
- 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
- 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
- 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
- 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
- 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
- };
- static unsigned char charset2upper[256] = {
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
- 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
- 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
- 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
- 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
- 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
- 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
- 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
- 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x60-0x67 */
- 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x68-0x6f */
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x70-0x77 */
- 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
- 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
- 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
- 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
- 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
- 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
- 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
- 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
- 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
- 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
- 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
- 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
- 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
- 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
- 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
- };
- static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
- {
- unsigned char *uni2charset;
- unsigned char cl = uni & 0x00ff;
- unsigned char ch = (uni & 0xff00) >> 8;
- if (boundlen <= 0)
- return -ENAMETOOLONG;
- uni2charset = page_uni2charset[ch];
- if (uni2charset && uni2charset[cl])
- out[0] = uni2charset[cl];
- else
- return -EINVAL;
- return 1;
- }
- static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
- {
- *uni = charset2uni[*rawstring];
- if (*uni == 0x0000)
- return -EINVAL;
- return 1;
- }
- static struct nls_table default_table = {
- "default",
- uni2char,
- char2uni,
- charset2lower,
- charset2upper,
- NULL,
- };
- /* Returns a simple default translation table */
- struct nls_table *load_nls_default(void)
- {
- struct nls_table *default_nls;
-
- default_nls = load_nls(CONFIG_NLS_DEFAULT);
- if (default_nls != NULL)
- return default_nls;
- else
- return &default_table;
- }
- EXPORT_SYMBOL(register_nls);
- EXPORT_SYMBOL(unregister_nls);
- EXPORT_SYMBOL(unload_nls);
- EXPORT_SYMBOL(load_nls);
- EXPORT_SYMBOL(load_nls_default);
- EXPORT_SYMBOL(utf8_mbtowc);
- EXPORT_SYMBOL(utf8_mbstowcs);
- EXPORT_SYMBOL(utf8_wctomb);
- EXPORT_SYMBOL(utf8_wcstombs);