| 1 | #ifndef _LINUX_NLS_H |
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| 2 | #define _LINUX_NLS_H |
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| 3 | |
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| 4 | #include <linux/init.h> |
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| 5 | |
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| 6 | /* unicode character */ |
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| 7 | typedef __u16 wchar_t; |
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| 8 | |
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| 9 | struct nls_table { |
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| 10 | char *charset; |
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| 11 | char *alias; |
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| 12 | int (*uni2char) (wchar_t uni, unsigned char *out, int boundlen); |
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| 13 | int (*char2uni) (const unsigned char *rawstring, int boundlen, |
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| 14 | wchar_t *uni); |
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| 15 | unsigned char *charset2lower; |
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| 16 | unsigned char *charset2upper; |
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| 17 | struct module *owner; |
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| 18 | struct nls_table *next; |
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| 19 | }; |
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| 20 | |
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| 21 | /* this value hold the maximum octet of charset */ |
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| 22 | #define NLS_MAX_CHARSET_SIZE 6 /* for UTF-8 */ |
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| 23 | |
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| 24 | /* nls.c */ |
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| 25 | extern int register_nls(struct nls_table *); |
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| 26 | extern int unregister_nls(struct nls_table *); |
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| 27 | extern struct nls_table *load_nls(char *); |
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| 28 | extern void unload_nls(struct nls_table *); |
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| 29 | extern struct nls_table *load_nls_default(void); |
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| 30 | |
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| 31 | extern int utf8_mbtowc(wchar_t *, const __u8 *, int); |
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| 32 | extern int utf8_mbstowcs(wchar_t *, const __u8 *, int); |
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| 33 | extern int utf8_wctomb(__u8 *, wchar_t, int); |
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| 34 | extern int utf8_wcstombs(__u8 *, const wchar_t *, int); |
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| 35 | |
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| 36 | static inline unsigned char nls_tolower(struct nls_table *t, unsigned char c) |
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| 37 | { |
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| 38 | unsigned char nc = t->charset2lower[c]; |
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| 39 | |
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| 40 | return nc ? nc : c; |
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| 41 | } |
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| 42 | |
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| 43 | static inline unsigned char nls_toupper(struct nls_table *t, unsigned char c) |
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| 44 | { |
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| 45 | unsigned char nc = t->charset2upper[c]; |
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| 46 | |
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| 47 | return nc ? nc : c; |
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| 48 | } |
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| 49 | |
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| 50 | static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1, |
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| 51 | const unsigned char *s2, int len) |
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| 52 | { |
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| 53 | while (len--) { |
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| 54 | if (nls_tolower(t, *s1++) != nls_tolower(t, *s2++)) |
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| 55 | return 1; |
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| 56 | } |
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| 57 | |
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| 58 | return 0; |
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| 59 | } |
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| 60 | |
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| 61 | #define MODULE_ALIAS_NLS(name) MODULE_ALIAS("nls_" __stringify(name)) |
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| 62 | |
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| 63 | #endif /* _LINUX_NLS_H */ |
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| 64 | |
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