118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2014 SGI.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it would be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef UTF8NORM_H
|
||
|
|
#define UTF8NORM_H
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/export.h>
|
||
|
|
#include <linux/string.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
|
||
|
|
/* Encoding a unicode version number as a single unsigned int. */
|
||
|
|
#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)))
|
||
|
|
|
||
|
|
/* Highest unicode version supported by the data tables. */
|
||
|
|
extern int utf8version_is_supported(u8 maj, u8 min, u8 rev);
|
||
|
|
extern int utf8version_latest(void);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Look for the correct const struct utf8data for a unicode version.
|
||
|
|
* Returns NULL if the version requested is too new.
|
||
|
|
*
|
||
|
|
* Two normalization forms are supported: nfdi and nfdicf.
|
||
|
|
*
|
||
|
|
* nfdi:
|
||
|
|
* - Apply unicode normalization form NFD.
|
||
|
|
* - Remove any Default_Ignorable_Code_Point.
|
||
|
|
*
|
||
|
|
* nfdicf:
|
||
|
|
* - Apply unicode normalization form NFD.
|
||
|
|
* - Remove any Default_Ignorable_Code_Point.
|
||
|
|
* - Apply a full casefold (C + F).
|
||
|
|
*/
|
||
|
|
extern const struct utf8data *utf8nfdi(unsigned int maxage);
|
||
|
|
extern const struct utf8data *utf8nfdicf(unsigned int maxage);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Determine the maximum age of any unicode character in the string.
|
||
|
|
* Returns 0 if only unassigned code points are present.
|
||
|
|
* Returns -1 if the input is not valid UTF-8.
|
||
|
|
*/
|
||
|
|
extern int utf8agemax(const struct utf8data *data, const char *s);
|
||
|
|
extern int utf8nagemax(const struct utf8data *data, const char *s, size_t len);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Determine the minimum age of any unicode character in the string.
|
||
|
|
* Returns 0 if any unassigned code points are present.
|
||
|
|
* Returns -1 if the input is not valid UTF-8.
|
||
|
|
*/
|
||
|
|
extern int utf8agemin(const struct utf8data *data, const char *s);
|
||
|
|
extern int utf8nagemin(const struct utf8data *data, const char *s, size_t len);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
extern ssize_t utf8len(const struct utf8data *data, const char *s);
|
||
|
|
extern ssize_t utf8nlen(const struct utf8data *data, const char *s, size_t len);
|
||
|
|
|
||
|
|
/* Needed in struct utf8cursor below. */
|
||
|
|
#define UTF8HANGULLEAF (12)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Cursor structure used by the normalizer.
|
||
|
|
*/
|
||
|
|
struct utf8cursor {
|
||
|
|
const struct utf8data *data;
|
||
|
|
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.
|
||
|
|
*/
|
||
|
|
extern int utf8cursor(struct utf8cursor *u8c, const struct utf8data *data,
|
||
|
|
const char *s);
|
||
|
|
extern int utf8ncursor(struct utf8cursor *u8c, const struct utf8data *data,
|
||
|
|
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);
|
||
|
|
|
||
|
|
#endif /* UTF8NORM_H */
|