forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
548 lines
16 KiB
548 lines
16 KiB
/* |
|
* 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 inlen, 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 (inlen <= 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 maxout) |
|
{ |
|
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 && maxout; t++, maxout--) { |
|
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); |
|
|
|
static inline void put_utf16(wchar_t *s, unsigned c, enum utf16_endian endian) |
|
{ |
|
switch (endian) { |
|
default: |
|
*s = (wchar_t) c; |
|
break; |
|
case UTF16_LITTLE_ENDIAN: |
|
*s = __cpu_to_le16(c); |
|
break; |
|
case UTF16_BIG_ENDIAN: |
|
*s = __cpu_to_be16(c); |
|
break; |
|
} |
|
} |
|
|
|
int utf8s_to_utf16s(const u8 *s, int inlen, enum utf16_endian endian, |
|
wchar_t *pwcs, int maxout) |
|
{ |
|
u16 *op; |
|
int size; |
|
unicode_t u; |
|
|
|
op = pwcs; |
|
while (inlen > 0 && maxout > 0 && *s) { |
|
if (*s & 0x80) { |
|
size = utf8_to_utf32(s, inlen, &u); |
|
if (size < 0) |
|
return -EINVAL; |
|
s += size; |
|
inlen -= size; |
|
|
|
if (u >= PLANE_SIZE) { |
|
if (maxout < 2) |
|
break; |
|
u -= PLANE_SIZE; |
|
put_utf16(op++, SURROGATE_PAIR | |
|
((u >> 10) & SURROGATE_BITS), |
|
endian); |
|
put_utf16(op++, SURROGATE_PAIR | |
|
SURROGATE_LOW | |
|
(u & SURROGATE_BITS), |
|
endian); |
|
maxout -= 2; |
|
} else { |
|
put_utf16(op++, u, endian); |
|
maxout--; |
|
} |
|
} else { |
|
put_utf16(op++, *s++, endian); |
|
inlen--; |
|
maxout--; |
|
} |
|
} |
|
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 inlen, enum utf16_endian endian, |
|
u8 *s, int maxout) |
|
{ |
|
u8 *op; |
|
int size; |
|
unsigned long u, v; |
|
|
|
op = s; |
|
while (inlen > 0 && maxout > 0) { |
|
u = get_utf16(*pwcs, endian); |
|
if (!u) |
|
break; |
|
pwcs++; |
|
inlen--; |
|
if (u > 0x7f) { |
|
if ((u & SURROGATE_MASK) == SURROGATE_PAIR) { |
|
if (u & SURROGATE_LOW) { |
|
/* Ignore character and move on */ |
|
continue; |
|
} |
|
if (inlen <= 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++; |
|
inlen--; |
|
} |
|
size = utf32_to_utf8(u, op, maxout); |
|
if (size == -1) { |
|
/* Ignore character and move on */ |
|
} else { |
|
op += size; |
|
maxout -= size; |
|
} |
|
} else { |
|
*op++ = (u8) u; |
|
maxout--; |
|
} |
|
} |
|
return op - s; |
|
} |
|
EXPORT_SYMBOL(utf16s_to_utf8s); |
|
|
|
int __register_nls(struct nls_table *nls, struct module *owner) |
|
{ |
|
struct nls_table ** tmp = &tables; |
|
|
|
if (nls->next) |
|
return -EBUSY; |
|
|
|
nls->owner = owner; |
|
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; |
|
} |
|
EXPORT_SYMBOL(__register_nls); |
|
|
|
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(unregister_nls); |
|
EXPORT_SYMBOL(unload_nls); |
|
EXPORT_SYMBOL(load_nls); |
|
EXPORT_SYMBOL(load_nls_default); |
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
|