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9d53690f GKB |
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 | ||
6ca99ce7 | 8 | struct utf8data; |
2b3d0478 | 9 | struct utf8data_table; |
6ca99ce7 | 10 | |
49bd03cc CH |
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 | ||
6ca99ce7 CH |
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 | ||
9d53690f | 50 | struct unicode_map { |
f3a9c823 | 51 | unsigned int version; |
6ca99ce7 | 52 | const struct utf8data *ntab[UTF8_NMAX]; |
2b3d0478 | 53 | const struct utf8data_table *tables; |
9d53690f GKB |
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); | |
3ae72562 GKB |
63 | int utf8_strncasecmp_folded(const struct unicode_map *um, |
64 | const struct qstr *cf, | |
65 | const struct qstr *s1); | |
9d53690f GKB |
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 | ||
3d7bfea8 DR |
73 | int utf8_casefold_hash(const struct unicode_map *um, const void *salt, |
74 | struct qstr *str); | |
75 | ||
49bd03cc | 76 | struct unicode_map *utf8_load(unsigned int version); |
9d53690f GKB |
77 | void utf8_unload(struct unicode_map *um); |
78 | ||
79 | #endif /* _LINUX_UNICODE_H */ |