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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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37
fs/unicode/utf8-core.c
View File

@@ -5,16 +5,13 @@
#include <linux/slab.h>
#include <linux/parser.h>
#include <linux/errno.h>
#include <linux/unicode.h>
#include <linux/stringhash.h>
#include "utf8n.h"
int utf8_validate(const struct unicode_map *um, const struct qstr *str)
{
const struct utf8data *data = utf8nfdi(um->version);
if (utf8nlen(data, str->name, str->len) < 0)
if (utf8nlen(um, UTF8_NFDI, str->name, str->len) < 0)
return -1;
return 0;
}
@@ -23,14 +20,13 @@ EXPORT_SYMBOL(utf8_validate);
int utf8_strncmp(const struct unicode_map *um,
const struct qstr *s1, const struct qstr *s2)
{
const struct utf8data *data = utf8nfdi(um->version);
struct utf8cursor cur1, cur2;
int c1, c2;
if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
if (utf8ncursor(&cur1, um, UTF8_NFDI, s1->name, s1->len) < 0)
return -EINVAL;
if (utf8ncursor(&cur2, data, s2->name, s2->len) < 0)
if (utf8ncursor(&cur2, um, UTF8_NFDI, s2->name, s2->len) < 0)
return -EINVAL;
do {
@@ -50,14 +46,13 @@ EXPORT_SYMBOL(utf8_strncmp);
int utf8_strncasecmp(const struct unicode_map *um,
const struct qstr *s1, const struct qstr *s2)
{
const struct utf8data *data = utf8nfdicf(um->version);
struct utf8cursor cur1, cur2;
int c1, c2;
if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
if (utf8ncursor(&cur1, um, UTF8_NFDICF, s1->name, s1->len) < 0)
return -EINVAL;
if (utf8ncursor(&cur2, data, s2->name, s2->len) < 0)
if (utf8ncursor(&cur2, um, UTF8_NFDICF, s2->name, s2->len) < 0)
return -EINVAL;
do {
@@ -81,12 +76,11 @@ int utf8_strncasecmp_folded(const struct unicode_map *um,
const struct qstr *cf,
const struct qstr *s1)
{
const struct utf8data *data = utf8nfdicf(um->version);
struct utf8cursor cur1;
int c1, c2;
int i = 0;
if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
if (utf8ncursor(&cur1, um, UTF8_NFDICF, s1->name, s1->len) < 0)
return -EINVAL;
do {
@@ -105,11 +99,10 @@ EXPORT_SYMBOL(utf8_strncasecmp_folded);
int utf8_casefold(const struct unicode_map *um, const struct qstr *str,
unsigned char *dest, size_t dlen)
{
const struct utf8data *data = utf8nfdicf(um->version);
struct utf8cursor cur;
size_t nlen = 0;
if (utf8ncursor(&cur, data, str->name, str->len) < 0)
if (utf8ncursor(&cur, um, UTF8_NFDICF, str->name, str->len) < 0)
return -EINVAL;
for (nlen = 0; nlen < dlen; nlen++) {
@@ -128,12 +121,11 @@ EXPORT_SYMBOL(utf8_casefold);
int utf8_casefold_hash(const struct unicode_map *um, const void *salt,
struct qstr *str)
{
const struct utf8data *data = utf8nfdicf(um->version);
struct utf8cursor cur;
int c;
unsigned long hash = init_name_hash(salt);
if (utf8ncursor(&cur, data, str->name, str->len) < 0)
if (utf8ncursor(&cur, um, UTF8_NFDICF, str->name, str->len) < 0)
return -EINVAL;
while ((c = utf8byte(&cur))) {
@@ -149,11 +141,10 @@ EXPORT_SYMBOL(utf8_casefold_hash);
int utf8_normalize(const struct unicode_map *um, const struct qstr *str,
unsigned char *dest, size_t dlen)
{
const struct utf8data *data = utf8nfdi(um->version);
struct utf8cursor cur;
ssize_t nlen = 0;
if (utf8ncursor(&cur, data, str->name, str->len) < 0)
if (utf8ncursor(&cur, um, UTF8_NFDI, str->name, str->len) < 0)
return -EINVAL;
for (nlen = 0; nlen < dlen; nlen++) {
@@ -180,7 +171,17 @@ struct unicode_map *utf8_load(unsigned int version)
if (!um)
return ERR_PTR(-ENOMEM);
um->version = version;
um->ntab[UTF8_NFDI] = utf8nfdi(version);
if (!um->ntab[UTF8_NFDI])
goto out_free_um;
um->ntab[UTF8_NFDICF] = utf8nfdicf(version);
if (!um->ntab[UTF8_NFDICF])
goto out_free_um;
return um;
out_free_um:
kfree(um);
return ERR_PTR(-EINVAL);
}
EXPORT_SYMBOL(utf8_load);