| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LINUX_UNICODE_H |
| #define _LINUX_UNICODE_H |
| |
| #include <linux/init.h> |
| #include <linux/dcache.h> |
| |
| struct utf8data; |
| struct utf8data_table; |
| |
| #define UNICODE_MAJ_SHIFT 16 |
| #define UNICODE_MIN_SHIFT 8 |
| |
| #define UNICODE_AGE(MAJ, MIN, REV) \ |
| (((unsigned int)(MAJ) << UNICODE_MAJ_SHIFT) | \ |
| ((unsigned int)(MIN) << UNICODE_MIN_SHIFT) | \ |
| ((unsigned int)(REV))) |
| |
| static inline u8 unicode_major(unsigned int age) |
| { |
| return (age >> UNICODE_MAJ_SHIFT) & 0xff; |
| } |
| |
| static inline u8 unicode_minor(unsigned int age) |
| { |
| return (age >> UNICODE_MIN_SHIFT) & 0xff; |
| } |
| |
| static inline u8 unicode_rev(unsigned int age) |
| { |
| return age & 0xff; |
| } |
| |
| /* |
| * Two normalization forms are supported: |
| * 1) NFDI |
| * - Apply unicode normalization form NFD. |
| * - Remove any Default_Ignorable_Code_Point. |
| * 2) NFDICF |
| * - Apply unicode normalization form NFD. |
| * - Remove any Default_Ignorable_Code_Point. |
| * - Apply a full casefold (C + F). |
| */ |
| enum utf8_normalization { |
| UTF8_NFDI = 0, |
| UTF8_NFDICF, |
| UTF8_NMAX, |
| }; |
| |
| struct unicode_map { |
| unsigned int version; |
| const struct utf8data *ntab[UTF8_NMAX]; |
| const struct utf8data_table *tables; |
| }; |
| |
| int utf8_validate(const struct unicode_map *um, const struct qstr *str); |
| |
| int utf8_strncmp(const struct unicode_map *um, |
| const struct qstr *s1, const struct qstr *s2); |
| |
| int utf8_strncasecmp(const struct unicode_map *um, |
| const struct qstr *s1, const struct qstr *s2); |
| int utf8_strncasecmp_folded(const struct unicode_map *um, |
| const struct qstr *cf, |
| const struct qstr *s1); |
| |
| int utf8_normalize(const struct unicode_map *um, const struct qstr *str, |
| unsigned char *dest, size_t dlen); |
| |
| int utf8_casefold(const struct unicode_map *um, const struct qstr *str, |
| unsigned char *dest, size_t dlen); |
| |
| int utf8_casefold_hash(const struct unicode_map *um, const void *salt, |
| struct qstr *str); |
| |
| struct unicode_map *utf8_load(unsigned int version); |
| void utf8_unload(struct unicode_map *um); |
| |
| #endif /* _LINUX_UNICODE_H */ |