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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Unicode related declarations
*/
#ifndef _LINUX_HFSPLUS_UNICODE_H
#define _LINUX_HFSPLUS_UNICODE_H
/*
* struct hfsplus_ccc_range - one run of consecutive BMP code points that
* share the same Unicode canonical combining class
* @first: the first UTF-16 code point in the run
* @last: the last code point in the run (inclusive)
* @combining_class: canonical combining class (ccc) shared by @first..@last
*/
struct hfsplus_ccc_range {
u16 first;
u16 last;
u8 combining_class;
};
/*
* struct hfsplus_legacy_decomp - corrected canonical decomposition
* @uc: the code point (a UTF-16 code unit) to look up
* @len: number of valid code units in @repl
* @repl: corrected decomposition sequence (base letter + combining marks)
*/
struct hfsplus_legacy_decomp {
u16 uc;
u8 len;
#define HFSPLUS_LEGACY_DECOMP_MAX_LEN (3)
u16 repl[HFSPLUS_LEGACY_DECOMP_MAX_LEN];
};
/*
* struct hfsplus_legacy_seq_fixup - corrected replacement for a short
* sequence of already-decomposed code units
* @match_len: number of valid code units in @match
* @match: decomposed sequence to look for in the buffer
* @repl_len: number of valid code units in @repl
* @repl: corrected sequence to substitute in place of @match
*/
struct hfsplus_legacy_seq_fixup {
u8 match_len;
#define HFSPLUS_LEGACY_SEQ_MAX_MATCH (3)
u16 match[HFSPLUS_LEGACY_SEQ_MAX_MATCH];
u8 repl_len;
#define HFSPLUS_LEGACY_SEQ_MAX_REPL (2)
u16 repl[HFSPLUS_LEGACY_SEQ_MAX_REPL];
};
extern u16 hfsplus_case_fold_table[];
extern u16 hfsplus_decompose_table[];
extern u16 hfsplus_compose_table[];
extern struct hfsplus_ccc_range hfsplus_ccc_table[];
extern struct hfsplus_legacy_decomp hfsplus_legacy_decomp_table[];
extern struct hfsplus_legacy_seq_fixup hfsplus_legacy_seq_fixups[];
u8 hfsplus_combining_class(u16 c);
const u16 *hfsplus_legacy_decompose(u16 uc, int *size);
void hfsplus_fixup_legacy_sequences(u16 *buf, int *len);
#endif /* _LINUX_HFSPLUS_UNICODE_H */
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