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524 lines
15 KiB
524 lines
15 KiB
/*
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* linux/fs/nls/nls_base.c
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*
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* Native language support--charsets and unicode translations.
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* By Gordon Chaffee 1996, 1997
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*
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* Unicode based case conversion 1999 by Wolfram Pienkoss
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*
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*/
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/nls.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/kmod.h>
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#include <linux/spinlock.h>
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#include <asm/byteorder.h>
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static struct nls_table default_table;
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static struct nls_table *tables = &default_table;
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static DEFINE_SPINLOCK(nls_lock);
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/*
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* Sample implementation from Unicode home page.
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* http://www.stonehand.com/unicode/standard/fss-utf.html
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*/
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struct utf8_table {
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int cmask;
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int cval;
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int shift;
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long lmask;
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long lval;
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};
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static const struct utf8_table utf8_table[] =
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{
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{0x80, 0x00, 0*6, 0x7F, 0, /* 1 byte sequence */},
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{0xE0, 0xC0, 1*6, 0x7FF, 0x80, /* 2 byte sequence */},
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{0xF0, 0xE0, 2*6, 0xFFFF, 0x800, /* 3 byte sequence */},
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{0xF8, 0xF0, 3*6, 0x1FFFFF, 0x10000, /* 4 byte sequence */},
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{0xFC, 0xF8, 4*6, 0x3FFFFFF, 0x200000, /* 5 byte sequence */},
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{0xFE, 0xFC, 5*6, 0x7FFFFFFF, 0x4000000, /* 6 byte sequence */},
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{0, /* end of table */}
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};
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#define UNICODE_MAX 0x0010ffff
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#define PLANE_SIZE 0x00010000
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#define SURROGATE_MASK 0xfffff800
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#define SURROGATE_PAIR 0x0000d800
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#define SURROGATE_LOW 0x00000400
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#define SURROGATE_BITS 0x000003ff
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int utf8_to_utf32(const u8 *s, int len, unicode_t *pu)
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{
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unsigned long l;
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int c0, c, nc;
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const struct utf8_table *t;
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nc = 0;
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c0 = *s;
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l = c0;
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for (t = utf8_table; t->cmask; t++) {
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nc++;
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if ((c0 & t->cmask) == t->cval) {
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l &= t->lmask;
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if (l < t->lval || l > UNICODE_MAX ||
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(l & SURROGATE_MASK) == SURROGATE_PAIR)
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return -1;
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*pu = (unicode_t) l;
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return nc;
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}
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if (len <= nc)
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return -1;
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s++;
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c = (*s ^ 0x80) & 0xFF;
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if (c & 0xC0)
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return -1;
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l = (l << 6) | c;
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}
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return -1;
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}
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EXPORT_SYMBOL(utf8_to_utf32);
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int utf32_to_utf8(unicode_t u, u8 *s, int maxlen)
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{
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unsigned long l;
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int c, nc;
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const struct utf8_table *t;
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if (!s)
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return 0;
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l = u;
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if (l > UNICODE_MAX || (l & SURROGATE_MASK) == SURROGATE_PAIR)
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return -1;
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nc = 0;
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for (t = utf8_table; t->cmask && maxlen; t++, maxlen--) {
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nc++;
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if (l <= t->lmask) {
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c = t->shift;
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*s = (u8) (t->cval | (l >> c));
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while (c > 0) {
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c -= 6;
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s++;
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*s = (u8) (0x80 | ((l >> c) & 0x3F));
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}
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return nc;
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}
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}
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return -1;
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}
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EXPORT_SYMBOL(utf32_to_utf8);
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int utf8s_to_utf16s(const u8 *s, int len, wchar_t *pwcs)
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{
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u16 *op;
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int size;
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unicode_t u;
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op = pwcs;
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while (*s && len > 0) {
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if (*s & 0x80) {
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size = utf8_to_utf32(s, len, &u);
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if (size < 0)
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return -EINVAL;
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if (u >= PLANE_SIZE) {
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u -= PLANE_SIZE;
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*op++ = (wchar_t) (SURROGATE_PAIR |
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((u >> 10) & SURROGATE_BITS));
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*op++ = (wchar_t) (SURROGATE_PAIR |
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SURROGATE_LOW |
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(u & SURROGATE_BITS));
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} else {
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*op++ = (wchar_t) u;
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}
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s += size;
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len -= size;
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} else {
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*op++ = *s++;
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len--;
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}
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}
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return op - pwcs;
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}
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EXPORT_SYMBOL(utf8s_to_utf16s);
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static inline unsigned long get_utf16(unsigned c, enum utf16_endian endian)
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{
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switch (endian) {
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default:
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return c;
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case UTF16_LITTLE_ENDIAN:
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return __le16_to_cpu(c);
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case UTF16_BIG_ENDIAN:
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return __be16_to_cpu(c);
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}
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}
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int utf16s_to_utf8s(const wchar_t *pwcs, int len, enum utf16_endian endian,
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u8 *s, int maxlen)
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{
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u8 *op;
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int size;
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unsigned long u, v;
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op = s;
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while (len > 0 && maxlen > 0) {
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u = get_utf16(*pwcs, endian);
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if (!u)
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break;
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pwcs++;
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len--;
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if (u > 0x7f) {
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if ((u & SURROGATE_MASK) == SURROGATE_PAIR) {
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if (u & SURROGATE_LOW) {
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/* Ignore character and move on */
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continue;
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}
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if (len <= 0)
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break;
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v = get_utf16(*pwcs, endian);
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if ((v & SURROGATE_MASK) != SURROGATE_PAIR ||
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!(v & SURROGATE_LOW)) {
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/* Ignore character and move on */
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continue;
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}
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u = PLANE_SIZE + ((u & SURROGATE_BITS) << 10)
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+ (v & SURROGATE_BITS);
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pwcs++;
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len--;
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}
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size = utf32_to_utf8(u, op, maxlen);
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if (size == -1) {
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/* Ignore character and move on */
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} else {
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op += size;
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maxlen -= size;
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}
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} else {
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*op++ = (u8) u;
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maxlen--;
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}
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}
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return op - s;
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}
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EXPORT_SYMBOL(utf16s_to_utf8s);
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int register_nls(struct nls_table * nls)
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{
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struct nls_table ** tmp = &tables;
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if (nls->next)
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return -EBUSY;
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spin_lock(&nls_lock);
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while (*tmp) {
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if (nls == *tmp) {
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spin_unlock(&nls_lock);
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return -EBUSY;
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}
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tmp = &(*tmp)->next;
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}
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nls->next = tables;
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tables = nls;
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spin_unlock(&nls_lock);
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return 0;
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}
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int unregister_nls(struct nls_table * nls)
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{
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struct nls_table ** tmp = &tables;
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spin_lock(&nls_lock);
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while (*tmp) {
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if (nls == *tmp) {
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*tmp = nls->next;
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spin_unlock(&nls_lock);
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return 0;
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}
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tmp = &(*tmp)->next;
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}
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spin_unlock(&nls_lock);
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return -EINVAL;
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}
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static struct nls_table *find_nls(char *charset)
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{
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struct nls_table *nls;
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spin_lock(&nls_lock);
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for (nls = tables; nls; nls = nls->next) {
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if (!strcmp(nls->charset, charset))
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break;
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if (nls->alias && !strcmp(nls->alias, charset))
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break;
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}
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if (nls && !try_module_get(nls->owner))
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nls = NULL;
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spin_unlock(&nls_lock);
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return nls;
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}
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struct nls_table *load_nls(char *charset)
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{
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return try_then_request_module(find_nls(charset), "nls_%s", charset);
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}
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void unload_nls(struct nls_table *nls)
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{
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if (nls)
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module_put(nls->owner);
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}
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static const wchar_t charset2uni[256] = {
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/* 0x00*/
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0x0000, 0x0001, 0x0002, 0x0003,
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0x0004, 0x0005, 0x0006, 0x0007,
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0x0008, 0x0009, 0x000a, 0x000b,
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0x000c, 0x000d, 0x000e, 0x000f,
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/* 0x10*/
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0x0010, 0x0011, 0x0012, 0x0013,
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0x0014, 0x0015, 0x0016, 0x0017,
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0x0018, 0x0019, 0x001a, 0x001b,
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0x001c, 0x001d, 0x001e, 0x001f,
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/* 0x20*/
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0x0020, 0x0021, 0x0022, 0x0023,
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0x0024, 0x0025, 0x0026, 0x0027,
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0x0028, 0x0029, 0x002a, 0x002b,
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0x002c, 0x002d, 0x002e, 0x002f,
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/* 0x30*/
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0x0030, 0x0031, 0x0032, 0x0033,
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0x0034, 0x0035, 0x0036, 0x0037,
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0x0038, 0x0039, 0x003a, 0x003b,
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0x003c, 0x003d, 0x003e, 0x003f,
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/* 0x40*/
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0x0040, 0x0041, 0x0042, 0x0043,
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0x0044, 0x0045, 0x0046, 0x0047,
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0x0048, 0x0049, 0x004a, 0x004b,
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0x004c, 0x004d, 0x004e, 0x004f,
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/* 0x50*/
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0x0050, 0x0051, 0x0052, 0x0053,
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0x0054, 0x0055, 0x0056, 0x0057,
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0x0058, 0x0059, 0x005a, 0x005b,
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0x005c, 0x005d, 0x005e, 0x005f,
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/* 0x60*/
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0x0060, 0x0061, 0x0062, 0x0063,
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0x0064, 0x0065, 0x0066, 0x0067,
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0x0068, 0x0069, 0x006a, 0x006b,
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0x006c, 0x006d, 0x006e, 0x006f,
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/* 0x70*/
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0x0070, 0x0071, 0x0072, 0x0073,
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0x0074, 0x0075, 0x0076, 0x0077,
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0x0078, 0x0079, 0x007a, 0x007b,
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0x007c, 0x007d, 0x007e, 0x007f,
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/* 0x80*/
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0x0080, 0x0081, 0x0082, 0x0083,
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0x0084, 0x0085, 0x0086, 0x0087,
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0x0088, 0x0089, 0x008a, 0x008b,
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0x008c, 0x008d, 0x008e, 0x008f,
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/* 0x90*/
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0x0090, 0x0091, 0x0092, 0x0093,
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0x0094, 0x0095, 0x0096, 0x0097,
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0x0098, 0x0099, 0x009a, 0x009b,
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0x009c, 0x009d, 0x009e, 0x009f,
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/* 0xa0*/
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0x00a0, 0x00a1, 0x00a2, 0x00a3,
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0x00a4, 0x00a5, 0x00a6, 0x00a7,
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0x00a8, 0x00a9, 0x00aa, 0x00ab,
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0x00ac, 0x00ad, 0x00ae, 0x00af,
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/* 0xb0*/
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0x00b0, 0x00b1, 0x00b2, 0x00b3,
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0x00b4, 0x00b5, 0x00b6, 0x00b7,
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0x00b8, 0x00b9, 0x00ba, 0x00bb,
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0x00bc, 0x00bd, 0x00be, 0x00bf,
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/* 0xc0*/
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0x00c0, 0x00c1, 0x00c2, 0x00c3,
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0x00c4, 0x00c5, 0x00c6, 0x00c7,
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0x00c8, 0x00c9, 0x00ca, 0x00cb,
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0x00cc, 0x00cd, 0x00ce, 0x00cf,
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/* 0xd0*/
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0x00d0, 0x00d1, 0x00d2, 0x00d3,
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0x00d4, 0x00d5, 0x00d6, 0x00d7,
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0x00d8, 0x00d9, 0x00da, 0x00db,
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0x00dc, 0x00dd, 0x00de, 0x00df,
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/* 0xe0*/
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0x00e0, 0x00e1, 0x00e2, 0x00e3,
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0x00e4, 0x00e5, 0x00e6, 0x00e7,
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0x00e8, 0x00e9, 0x00ea, 0x00eb,
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0x00ec, 0x00ed, 0x00ee, 0x00ef,
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/* 0xf0*/
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0x00f0, 0x00f1, 0x00f2, 0x00f3,
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0x00f4, 0x00f5, 0x00f6, 0x00f7,
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0x00f8, 0x00f9, 0x00fa, 0x00fb,
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0x00fc, 0x00fd, 0x00fe, 0x00ff,
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};
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static const unsigned char page00[256] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
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0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
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0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
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0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
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0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
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0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
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0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
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0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
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0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
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0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
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0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
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0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
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0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
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0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
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0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
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0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
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0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
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0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
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0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
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0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
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0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
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0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
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0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
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0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
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0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
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0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
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0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
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};
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static const unsigned char *const page_uni2charset[256] = {
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page00
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};
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static const unsigned char charset2lower[256] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
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0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
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0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
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|
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");
|
|
|