| /* |
| * linux/fs/nls/nls_base.c |
| * |
| * Native language support--charsets and unicode translations. |
| * By Gordon Chaffee 1996, 1997 |
| * |
| * Unicode based case conversion 1999 by Wolfram Pienkoss |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/string.h> |
| #include <linux/nls.h> |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/kmod.h> |
| #include <linux/spinlock.h> |
| #include <asm/byteorder.h> |
| |
| static struct nls_table default_table; |
| static struct nls_table *tables = &default_table; |
| static DEFINE_SPINLOCK(nls_lock); |
| |
| /* |
| * 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 const 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 */} |
| }; |
| |
| #define UNICODE_MAX 0x0010ffff |
| #define PLANE_SIZE 0x00010000 |
| |
| #define SURROGATE_MASK 0xfffff800 |
| #define SURROGATE_PAIR 0x0000d800 |
| #define SURROGATE_LOW 0x00000400 |
| #define SURROGATE_BITS 0x000003ff |
| |
| int utf8_to_utf32(const u8 *s, int len, unicode_t *pu) |
| { |
| unsigned long l; |
| int c0, c, nc; |
| const 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 || l > UNICODE_MAX || |
| (l & SURROGATE_MASK) == SURROGATE_PAIR) |
| return -1; |
| *pu = (unicode_t) l; |
| return nc; |
| } |
| if (len <= nc) |
| return -1; |
| s++; |
| c = (*s ^ 0x80) & 0xFF; |
| if (c & 0xC0) |
| return -1; |
| l = (l << 6) | c; |
| } |
| return -1; |
| } |
| EXPORT_SYMBOL(utf8_to_utf32); |
| |
| int utf32_to_utf8(unicode_t u, u8 *s, int maxlen) |
| { |
| unsigned long l; |
| int c, nc; |
| const struct utf8_table *t; |
| |
| if (!s) |
| return 0; |
| |
| l = u; |
| if (l > UNICODE_MAX || (l & SURROGATE_MASK) == SURROGATE_PAIR) |
| return -1; |
| |
| nc = 0; |
| for (t = utf8_table; t->cmask && maxlen; t++, maxlen--) { |
| nc++; |
| if (l <= t->lmask) { |
| c = t->shift; |
| *s = (u8) (t->cval | (l >> c)); |
| while (c > 0) { |
| c -= 6; |
| s++; |
| *s = (u8) (0x80 | ((l >> c) & 0x3F)); |
| } |
| return nc; |
| } |
| } |
| return -1; |
| } |
| EXPORT_SYMBOL(utf32_to_utf8); |
| |
| int utf8s_to_utf16s(const u8 *s, int len, wchar_t *pwcs) |
| { |
| u16 *op; |
| int size; |
| unicode_t u; |
| |
| op = pwcs; |
| while (*s && len > 0) { |
| if (*s & 0x80) { |
| size = utf8_to_utf32(s, len, &u); |
| if (size < 0) { |
| /* Ignore character and move on */ |
| size = 1; |
| } else if (u >= PLANE_SIZE) { |
| u -= PLANE_SIZE; |
| *op++ = (wchar_t) (SURROGATE_PAIR | |
| ((u >> 10) & SURROGATE_BITS)); |
| *op++ = (wchar_t) (SURROGATE_PAIR | |
| SURROGATE_LOW | |
| (u & SURROGATE_BITS)); |
| } else { |
| *op++ = (wchar_t) u; |
| } |
| s += size; |
| len -= size; |
| } else { |
| *op++ = *s++; |
| len--; |
| } |
| } |
| return op - pwcs; |
| } |
| EXPORT_SYMBOL(utf8s_to_utf16s); |
| |
| static inline unsigned long get_utf16(unsigned c, enum utf16_endian endian) |
| { |
| switch (endian) { |
| default: |
| return c; |
| case UTF16_LITTLE_ENDIAN: |
| return __le16_to_cpu(c); |
| case UTF16_BIG_ENDIAN: |
| return __be16_to_cpu(c); |
| } |
| } |
| |
| int utf16s_to_utf8s(const wchar_t *pwcs, int len, enum utf16_endian endian, |
| u8 *s, int maxlen) |
| { |
| u8 *op; |
| int size; |
| unsigned long u, v; |
| |
| op = s; |
| while (len > 0 && maxlen > 0) { |
| u = get_utf16(*pwcs, endian); |
| if (!u) |
| break; |
| pwcs++; |
| len--; |
| if (u > 0x7f) { |
| if ((u & SURROGATE_MASK) == SURROGATE_PAIR) { |
| if (u & SURROGATE_LOW) { |
| /* Ignore character and move on */ |
| continue; |
| } |
| if (len <= 0) |
| break; |
| v = get_utf16(*pwcs, endian); |
| if ((v & SURROGATE_MASK) != SURROGATE_PAIR || |
| !(v & SURROGATE_LOW)) { |
| /* Ignore character and move on */ |
| continue; |
| } |
| u = PLANE_SIZE + ((u & SURROGATE_BITS) << 10) |
| + (v & SURROGATE_BITS); |
| pwcs++; |
| len--; |
| } |
| size = utf32_to_utf8(u, op, maxlen); |
| if (size == -1) { |
| /* Ignore character and move on */ |
| } else { |
| op += size; |
| maxlen -= size; |
| } |
| } else { |
| *op++ = (u8) u; |
| maxlen--; |
| } |
| } |
| return op - s; |
| } |
| EXPORT_SYMBOL(utf16s_to_utf8s); |
| |
| int register_nls(struct nls_table * nls) |
| { |
| struct nls_table ** tmp = &tables; |
| |
| 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->alias && !strcmp(nls->alias, charset)) |
| break; |
| } |
| if (nls && !try_module_get(nls->owner)) |
| nls = NULL; |
| spin_unlock(&nls_lock); |
| return nls; |
| } |
| |
| struct nls_table *load_nls(char *charset) |
| { |
| return try_then_request_module(find_nls(charset), "nls_%s", charset); |
| } |
| |
| void unload_nls(struct nls_table *nls) |
| { |
| if (nls) |
| module_put(nls->owner); |
| } |
| |
| static const 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 const 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 const unsigned char *const page_uni2charset[256] = { |
| page00 |
| }; |
| |
| static const 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 const 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) |
| { |
| const 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 = { |
| .charset = "default", |
| .uni2char = uni2char, |
| .char2uni = char2uni, |
| .charset2lower = charset2lower, |
| .charset2upper = charset2upper, |
| }; |
| |
| /* 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); |
| |
| MODULE_LICENSE("Dual BSD/GPL"); |
