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unicode: cache the normalization tables in struct unicode_map

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Instead of repeatedly looking up the version add pointers to the
NFD and NFD+CF tables to struct unicode_map, and pass a
unicode_map plus index to the functions using the normalization
tables.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
This commit is contained in:
Christoph Hellwig
2021-09-15 09:00:04 +02:00
committed by Gabriel Krisman Bertazi
parent fbc59d6505
commit 6ca99ce756
5 changed files with 99 additions and 96 deletions
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10
fs/unicode/utf8n.h
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@@ -39,7 +39,8 @@ extern const struct utf8data *utf8nfdicf(unsigned int maxage);
* Returns 0 if only ignorable code points are present.
* Returns -1 if the input is not valid UTF-8.
*/
extern ssize_t utf8nlen(const struct utf8data *data, const char *s, size_t len);
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)
@@ -48,7 +49,8 @@ extern ssize_t utf8nlen(const struct utf8data *data, const char *s, size_t len);
* Cursor structure used by the normalizer.
*/
struct utf8cursor {
const struct utf8data *data;
const struct unicode_map *um;
enum utf8_normalization n;
const char *s;
const char *p;
const char *ss;
@@ -65,8 +67,8 @@ struct utf8cursor {
* Returns 0 on success.
* Returns -1 on failure.
*/
extern int utf8ncursor(struct utf8cursor *u8c, const struct utf8data *data,
const char *s, size_t len);
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.