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- /* 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 */
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