1 // SPDX-License-Identifier: GPL-2.0-only
3 * Kernel module for testing utf-8 support.
5 * Copyright 2017 Collabora Ltd.
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/module.h>
11 #include <linux/printk.h>
12 #include <linux/unicode.h>
13 #include <linux/dcache.h>
17 unsigned int failed_tests;
18 unsigned int total_tests;
20 /* Tests will be based on this version. */
21 #define UTF8_LATEST UNICODE_AGE(12, 1, 0)
23 #define _test(cond, func, line, fmt, ...) do { \
27 pr_err("test %s:%d Failed: %s%s", \
28 func, line, #cond, (fmt?":":".")); \
30 pr_err(fmt, ##__VA_ARGS__); \
33 #define test_f(cond, fmt, ...) _test(cond, __func__, __LINE__, fmt, ##__VA_ARGS__)
34 #define test(cond) _test(cond, __func__, __LINE__, "")
37 /* UTF-8 strings in this vector _must_ be NULL-terminated. */
38 unsigned char str[10];
39 unsigned char dec[10];
40 } nfdi_test_data[] = {
41 /* Trivial sequence */
43 /* "ABba" decomposes to itself */
47 /* Simple equivalent sequences */
49 /* 'VULGAR FRACTION ONE QUARTER' cannot decompose to
50 'NUMBER 1' + 'FRACTION SLASH' + 'NUMBER 4' on
51 canonical decomposition */
52 .str = {0xc2, 0xbc, 0x00},
53 .dec = {0xc2, 0xbc, 0x00},
56 /* 'LATIN SMALL LETTER A WITH DIAERESIS' decomposes to
57 'LETTER A' + 'COMBINING DIAERESIS' */
58 .str = {0xc3, 0xa4, 0x00},
59 .dec = {0x61, 0xcc, 0x88, 0x00},
62 /* 'LATIN SMALL LETTER LJ' can't decompose to
63 'LETTER L' + 'LETTER J' on canonical decomposition */
64 .str = {0xC7, 0x89, 0x00},
65 .dec = {0xC7, 0x89, 0x00},
68 /* GREEK ANO TELEIA decomposes to MIDDLE DOT */
69 .str = {0xCE, 0x87, 0x00},
70 .dec = {0xC2, 0xB7, 0x00}
72 /* Canonical ordering */
74 /* A + 'COMBINING ACUTE ACCENT' + 'COMBINING OGONEK' decomposes
75 to A + 'COMBINING OGONEK' + 'COMBINING ACUTE ACCENT' */
76 .str = {0x41, 0xcc, 0x81, 0xcc, 0xa8, 0x0},
77 .dec = {0x41, 0xcc, 0xa8, 0xcc, 0x81, 0x0},
80 /* 'LATIN SMALL LETTER A WITH DIAERESIS' + 'COMBINING OGONEK'
82 'LETTER A' + 'COMBINING OGONEK' + 'COMBINING DIAERESIS' */
83 .str = {0xc3, 0xa4, 0xCC, 0xA8, 0x00},
85 .dec = {0x61, 0xCC, 0xA8, 0xcc, 0x88, 0x00},
91 /* UTF-8 strings in this vector _must_ be NULL-terminated. */
92 unsigned char str[30];
93 unsigned char ncf[30];
94 } nfdicf_test_data[] = {
95 /* Trivial sequences */
97 /* "ABba" folds to lowercase */
98 .str = {0x41, 0x42, 0x62, 0x61, 0x00},
99 .ncf = {0x61, 0x62, 0x62, 0x61, 0x00},
102 /* All ASCII folds to lower-case */
103 .str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0.1",
104 .ncf = "abcdefghijklmnopqrstuvwxyz0.1",
107 /* LATIN SMALL LETTER SHARP S folds to
108 LATIN SMALL LETTER S + LATIN SMALL LETTER S */
109 .str = {0xc3, 0x9f, 0x00},
110 .ncf = {0x73, 0x73, 0x00},
113 /* LATIN CAPITAL LETTER A WITH RING ABOVE folds to
114 LATIN SMALL LETTER A + COMBINING RING ABOVE */
115 .str = {0xC3, 0x85, 0x00},
116 .ncf = {0x61, 0xcc, 0x8a, 0x00},
118 /* Introduced by UTF-8.0.0. */
119 /* Cherokee letters are interesting test-cases because they fold
120 to upper-case. Before 8.0.0, Cherokee lowercase were
121 undefined, thus, the folding from LC is not stable between
122 7.0.0 -> 8.0.0, but it is from UC. */
124 /* CHEROKEE SMALL LETTER A folds to CHEROKEE LETTER A */
125 .str = {0xea, 0xad, 0xb0, 0x00},
126 .ncf = {0xe1, 0x8e, 0xa0, 0x00},
129 /* CHEROKEE SMALL LETTER YE folds to CHEROKEE LETTER YE */
130 .str = {0xe1, 0x8f, 0xb8, 0x00},
131 .ncf = {0xe1, 0x8f, 0xb0, 0x00},
134 /* OLD HUNGARIAN CAPITAL LETTER AMB folds to
135 OLD HUNGARIAN SMALL LETTER AMB */
136 .str = {0xf0, 0x90, 0xb2, 0x83, 0x00},
137 .ncf = {0xf0, 0x90, 0xb3, 0x83, 0x00},
139 /* Introduced by UTF-9.0.0. */
141 /* OSAGE CAPITAL LETTER CHA folds to
142 OSAGE SMALL LETTER CHA */
143 .str = {0xf0, 0x90, 0x92, 0xb5, 0x00},
144 .ncf = {0xf0, 0x90, 0x93, 0x9d, 0x00},
147 /* LATIN CAPITAL LETTER SMALL CAPITAL I folds to
148 LATIN LETTER SMALL CAPITAL I */
149 .str = {0xea, 0x9e, 0xae, 0x00},
150 .ncf = {0xc9, 0xaa, 0x00},
152 /* Introduced by UTF-11.0.0. */
154 /* GEORGIAN SMALL LETTER AN folds to GEORGIAN MTAVRULI
156 .str = {0xe1, 0xb2, 0x90, 0x00},
157 .ncf = {0xe1, 0x83, 0x90, 0x00},
161 static ssize_t utf8len(const struct unicode_map *um, enum utf8_normalization n,
164 return utf8nlen(um, n, s, (size_t)-1);
167 static int utf8cursor(struct utf8cursor *u8c, const struct unicode_map *um,
168 enum utf8_normalization n, const char *s)
170 return utf8ncursor(u8c, um, n, s, (unsigned int)-1);
173 static void check_utf8_nfdi(struct unicode_map *um)
176 struct utf8cursor u8c;
178 for (i = 0; i < ARRAY_SIZE(nfdi_test_data); i++) {
179 int len = strlen(nfdi_test_data[i].str);
180 int nlen = strlen(nfdi_test_data[i].dec);
184 test((utf8len(um, UTF8_NFDI, nfdi_test_data[i].str) == nlen));
185 test((utf8nlen(um, UTF8_NFDI, nfdi_test_data[i].str, len) ==
188 if (utf8cursor(&u8c, um, UTF8_NFDI, nfdi_test_data[i].str) < 0)
189 pr_err("can't create cursor\n");
191 while ((c = utf8byte(&u8c)) > 0) {
192 test_f((c == nfdi_test_data[i].dec[j]),
193 "Unexpected byte 0x%x should be 0x%x\n",
194 c, nfdi_test_data[i].dec[j]);
202 static void check_utf8_nfdicf(struct unicode_map *um)
205 struct utf8cursor u8c;
207 for (i = 0; i < ARRAY_SIZE(nfdicf_test_data); i++) {
208 int len = strlen(nfdicf_test_data[i].str);
209 int nlen = strlen(nfdicf_test_data[i].ncf);
213 test((utf8len(um, UTF8_NFDICF, nfdicf_test_data[i].str) ==
215 test((utf8nlen(um, UTF8_NFDICF, nfdicf_test_data[i].str, len) ==
218 if (utf8cursor(&u8c, um, UTF8_NFDICF,
219 nfdicf_test_data[i].str) < 0)
220 pr_err("can't create cursor\n");
222 while ((c = utf8byte(&u8c)) > 0) {
223 test_f((c == nfdicf_test_data[i].ncf[j]),
224 "Unexpected byte 0x%x should be 0x%x\n",
225 c, nfdicf_test_data[i].ncf[j]);
233 static void check_utf8_comparisons(struct unicode_map *table)
237 for (i = 0; i < ARRAY_SIZE(nfdi_test_data); i++) {
238 const struct qstr s1 = {.name = nfdi_test_data[i].str,
239 .len = sizeof(nfdi_test_data[i].str)};
240 const struct qstr s2 = {.name = nfdi_test_data[i].dec,
241 .len = sizeof(nfdi_test_data[i].dec)};
243 test_f(!utf8_strncmp(table, &s1, &s2),
244 "%s %s comparison mismatch\n", s1.name, s2.name);
247 for (i = 0; i < ARRAY_SIZE(nfdicf_test_data); i++) {
248 const struct qstr s1 = {.name = nfdicf_test_data[i].str,
249 .len = sizeof(nfdicf_test_data[i].str)};
250 const struct qstr s2 = {.name = nfdicf_test_data[i].ncf,
251 .len = sizeof(nfdicf_test_data[i].ncf)};
253 test_f(!utf8_strncasecmp(table, &s1, &s2),
254 "%s %s comparison mismatch\n", s1.name, s2.name);
258 static void check_supported_versions(struct unicode_map *um)
260 /* Unicode 7.0.0 should be supported. */
261 test(utf8version_is_supported(um, UNICODE_AGE(7, 0, 0)));
263 /* Unicode 9.0.0 should be supported. */
264 test(utf8version_is_supported(um, UNICODE_AGE(9, 0, 0)));
266 /* Unicode 1x.0.0 (the latest version) should be supported. */
267 test(utf8version_is_supported(um, UTF8_LATEST));
269 /* Next versions don't exist. */
270 test(!utf8version_is_supported(um, UNICODE_AGE(13, 0, 0)));
271 test(!utf8version_is_supported(um, UNICODE_AGE(0, 0, 0)));
272 test(!utf8version_is_supported(um, UNICODE_AGE(-1, -1, -1)));
275 static int __init init_test_ucd(void)
277 struct unicode_map *um;
282 um = utf8_load(UTF8_LATEST);
284 pr_err("%s: Unable to load utf8 table.\n", __func__);
288 check_supported_versions(um);
290 check_utf8_nfdicf(um);
291 check_utf8_comparisons(um);
294 pr_info("All %u tests passed\n", total_tests);
296 pr_err("%u out of %u tests failed\n", failed_tests,
302 static void __exit exit_test_ucd(void)
306 module_init(init_test_ucd);
307 module_exit(exit_test_ucd);
309 MODULE_AUTHOR("Gabriel Krisman Bertazi <krisman@collabora.co.uk>");
310 MODULE_LICENSE("GPL");