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