Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxxxx> --- fs/nls/Makefile | 2 +- fs/nls/nls_base.c | 458 ----------------------------------------- fs/nls/nls_default.c | 473 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 474 insertions(+), 459 deletions(-) create mode 100644 fs/nls/nls_default.c diff --git a/fs/nls/Makefile b/fs/nls/Makefile index ac54db297128..d7cdcc797db7 100644 --- a/fs/nls/Makefile +++ b/fs/nls/Makefile @@ -3,7 +3,7 @@ # Makefile for native language support # -obj-$(CONFIG_NLS) += nls_base.o +obj-$(CONFIG_NLS) += nls_base.o nls_default.o obj-$(CONFIG_NLS_CODEPAGE_437) += nls_cp437.o obj-$(CONFIG_NLS_CODEPAGE_737) += nls_cp737.o diff --git a/fs/nls/nls_base.c b/fs/nls/nls_base.c index 0bb0acf6893f..47deb2fcf3aa 100644 --- a/fs/nls/nls_base.c +++ b/fs/nls/nls_base.c @@ -15,223 +15,11 @@ #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; @@ -299,254 +87,8 @@ void unload_nls(struct nls_table *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 const struct nls_ops charset_ops = { - .uni2char = uni2char, - .char2uni = char2uni, -}; - -static struct nls_table default_table = { - .charset = "default", - .ops = &charset_ops, - .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"); diff --git a/fs/nls/nls_default.c b/fs/nls/nls_default.c new file mode 100644 index 000000000000..2cf2c8b12e78 --- /dev/null +++ b/fs/nls/nls_default.c @@ -0,0 +1,473 @@ +/* + * linux/fs/nls/nls_default.c + * + * Native language support--charsets and unicode translations. + * By Gordon Chaffee 1996, 1997 + * + * Unicode based case conversion 1999 by Wolfram Pienkoss + * + */ + +/* + * Sample implementation from Unicode home page. + * http://www.stonehand.com/unicode/standard/fss-utf.html + */ + +#include <linux/module.h> +#include <asm/byteorder.h> +#include <linux/nls.h> + +static struct nls_table default_table; + +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); + +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 const struct nls_ops charset_ops = { + .uni2char = uni2char, + .char2uni = char2uni, +}; + +static struct nls_table default_table = { + .charset = "default", + .ops = &charset_ops, + .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(load_nls_default); -- 2.17.0
