1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_UNICODE_H |
3 | #define _LINUX_UNICODE_H |
4 | |
5 | #include <linux/init.h> |
6 | #include <linux/dcache.h> |
7 | |
8 | struct utf8data; |
9 | struct utf8data_table; |
10 | |
11 | #define UNICODE_MAJ_SHIFT 16 |
12 | #define UNICODE_MIN_SHIFT 8 |
13 | |
14 | #define UNICODE_AGE(MAJ, MIN, REV) \ |
15 | (((unsigned int)(MAJ) << UNICODE_MAJ_SHIFT) | \ |
16 | ((unsigned int)(MIN) << UNICODE_MIN_SHIFT) | \ |
17 | ((unsigned int)(REV))) |
18 | |
19 | static inline u8 unicode_major(unsigned int age) |
20 | { |
21 | return (age >> UNICODE_MAJ_SHIFT) & 0xff; |
22 | } |
23 | |
24 | static inline u8 unicode_minor(unsigned int age) |
25 | { |
26 | return (age >> UNICODE_MIN_SHIFT) & 0xff; |
27 | } |
28 | |
29 | static inline u8 unicode_rev(unsigned int age) |
30 | { |
31 | return age & 0xff; |
32 | } |
33 | |
34 | /* |
35 | * Two normalization forms are supported: |
36 | * 1) NFDI |
37 | * - Apply unicode normalization form NFD. |
38 | * - Remove any Default_Ignorable_Code_Point. |
39 | * 2) NFDICF |
40 | * - Apply unicode normalization form NFD. |
41 | * - Remove any Default_Ignorable_Code_Point. |
42 | * - Apply a full casefold (C + F). |
43 | */ |
44 | enum utf8_normalization { |
45 | UTF8_NFDI = 0, |
46 | UTF8_NFDICF, |
47 | UTF8_NMAX, |
48 | }; |
49 | |
50 | struct unicode_map { |
51 | unsigned int version; |
52 | const struct utf8data *ntab[UTF8_NMAX]; |
53 | const struct utf8data_table *tables; |
54 | }; |
55 | |
56 | int utf8_validate(const struct unicode_map *um, const struct qstr *str); |
57 | |
58 | int utf8_strncmp(const struct unicode_map *um, |
59 | const struct qstr *s1, const struct qstr *s2); |
60 | |
61 | int utf8_strncasecmp(const struct unicode_map *um, |
62 | const struct qstr *s1, const struct qstr *s2); |
63 | int utf8_strncasecmp_folded(const struct unicode_map *um, |
64 | const struct qstr *cf, |
65 | const struct qstr *s1); |
66 | |
67 | int utf8_normalize(const struct unicode_map *um, const struct qstr *str, |
68 | unsigned char *dest, size_t dlen); |
69 | |
70 | int utf8_casefold(const struct unicode_map *um, const struct qstr *str, |
71 | unsigned char *dest, size_t dlen); |
72 | |
73 | int utf8_casefold_hash(const struct unicode_map *um, const void *salt, |
74 | struct qstr *str); |
75 | |
76 | struct unicode_map *utf8_load(unsigned int version); |
77 | void utf8_unload(struct unicode_map *um); |
78 | |
79 | #endif /* _LINUX_UNICODE_H */ |
80 | |