/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (c) 2014 SGI. * All rights reserved. */ #ifndef UTF8NORM_H#define UTF8NORM_H #include <linux/types.h>#include <linux/export.h>#include <linux/string.h>#include <linux/module.h>#include <linux/unicode.h> int utf8version_is_supported(const struct unicode_map *um, unsigned int version); /* * Determine the length of the normalized from of the string, * excluding any terminating NULL byte. * Returns 0 if only ignorable code points are present. * Returns -1 if the input is not valid UTF-8. */ssize_t utf8nlen(const struct unicode_map *um, enum utf8_normalization n,		const char *s, size_t len); /* Needed in struct utf8cursor below. */#define UTF8HANGULLEAF	(12) /* * Cursor structure used by the normalizer. */struct utf8cursor {	const struct unicode_map *um;	enum utf8_normalization n;	const char	*s;	const char	*p;	const char	*ss;	const char	*sp;	unsigned int	len;	unsigned int	slen;	short int	ccc;	short int	nccc;	unsigned char	hangul[UTF8HANGULLEAF];}; /* * Initialize a utf8cursor to normalize a string. * Returns 0 on success. * Returns -1 on failure. */int utf8ncursor(struct utf8cursor *u8c, const struct unicode_map *um,		enum utf8_normalization n, const char *s, size_t len); /* * Get the next byte in the normalization. * Returns a value > 0 && < 256 on success. * Returns 0 when the end of the normalization is reached. * Returns -1 if the string being normalized is not valid UTF-8. */extern int utf8byte(struct utf8cursor *u8c); struct utf8data {	unsigned int maxage;	unsigned int offset;}; struct utf8data_table {	const unsigned int *utf8agetab;	int utf8agetab_size; 	const struct utf8data *utf8nfdicfdata;	int utf8nfdicfdata_size; 	const struct utf8data *utf8nfdidata;	int utf8nfdidata_size; 	const unsigned char *utf8data;}; extern const struct utf8data_table utf8_data_table; #endif /* UTF8NORM_H */