From: Gabriel Krisman Bertazi Subject: [PATCH RFC v2 08/13] charsets: utf8: Introduce test module for kernel UTF-8 implementation Date: Thu, 25 Jan 2018 00:53:44 -0200 Message-ID: <20180125025349.31494-9-krisman@collabora.co.uk> References: <20180125025349.31494-1-krisman@collabora.co.uk> Cc: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, alvaro.soliverez@collabora.co.uk, kernel@lists.collabora.co.uk, Gabriel Krisman Bertazi To: tytso@mit.edu, david@fromorbit.com, olaf@sgi.com, viro@zeniv.linux.org.uk Return-path: Received: from bhuna.collabora.co.uk ([46.235.227.227]:52082 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933065AbeAYCzO (ORCPT ); Wed, 24 Jan 2018 21:55:14 -0500 In-Reply-To: <20180125025349.31494-1-krisman@collabora.co.uk> Sender: linux-ext4-owner@vger.kernel.org List-ID: Changes since RFC v1: - Include comparison tests for matching strings with different lengths. - Include tests for characters included in unicode 8.0.0, 9.0.0 and 10.0.0. Signed-off-by: Gabriel Krisman Bertazi --- lib/Kconfig | 5 + lib/charsets/Makefile | 1 + lib/charsets/test_ucd.c | 305 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 311 insertions(+) create mode 100644 lib/charsets/test_ucd.c diff --git a/lib/Kconfig b/lib/Kconfig index 9ca3bda7b2be..dd4552dae48b 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -593,6 +593,11 @@ config UTF8_NORMALIZATION depends on CHARSETS help Say Y here to enable utf8 normalization support. + +config UTF8_SELFTEST + tristate "Test UTF-8 normalization support" + default n + depends on UTF8_NORMALIZATION endmenu config GENERIC_ASHLDI3 diff --git a/lib/charsets/Makefile b/lib/charsets/Makefile index 004d0e5d6ac4..cd57912ce7cb 100644 --- a/lib/charsets/Makefile +++ b/lib/charsets/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_CHARSETS) += ascii.o utf8-y += utf8_core.o utf8norm.o obj-$(CONFIG_UTF8_NORMALIZATION) += utf8.o +obj-$(CONFIG_UTF8_SELFTEST) += test_ucd.o $(obj)/utf8norm.o: $(obj)/utf8data.h $(obj)/utf8data.h: $(srctree)/$(src)/ucd/*.txt $(objtree)/scripts/mkutf8data FORCE diff --git a/lib/charsets/test_ucd.c b/lib/charsets/test_ucd.c new file mode 100644 index 000000000000..a579b798e82f --- /dev/null +++ b/lib/charsets/test_ucd.c @@ -0,0 +1,305 @@ +/* + * Kernel module for testing utf-8 support. + * + * Copyright 2017 Collabora Ltd. All Rights Reserved + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will 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. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include + +unsigned int failed_tests; +unsigned int total_tests; + +/* Tests will be based on this version. */ +#define latest_maj 10 +#define latest_min 0 +#define latest_rev 0 + +#define _test(cond, func, line, fmt, ...) do { \ + total_tests++; \ + if (!cond) { \ + failed_tests++; \ + pr_err("test %s:%d Failed: %s%s", \ + func, line, #cond, (fmt?":":".")); \ + if (fmt) \ + pr_err(fmt, ##__VA_ARGS__); \ + } \ + } while (0) +#define test_f(cond, fmt, ...) _test(cond, __func__, __LINE__, fmt, ##__VA_ARGS__) +#define test(cond) _test(cond, __func__, __LINE__, "") + +const static struct { + /* UTF-8 strings in this vector _must_ be NULL-terminated. */ + unsigned char str[10]; + unsigned char dec[10]; +} nfkdi_test_data[] = { + /* Trivial sequence */ + { + /* "ABba" decomposes to itself */ + .str = {0x41, 0x42, 0x62, 0x61, 0x00}, + .dec = {0x41, 0x42, 0x62, 0x61, 0x00} + }, + /* Simple equivalent sequences */ + { + /* 'VULGAR FRACTION ONE QUARTER' decomposes to + 'NUMBER 1' + 'FRACTION SLASH' + 'NUMBER 4' */ + .str = {0xc2, 0xbc, 0x00}, + .dec = {0x31, 0xe2, 0x81, 0x84, 0x34, 0x00}, + }, + { + /* 'LATIN SMALL LETTER A WITH DIAERESIS' decomposes to + 'LETTER A' + 'COMBINING DIAERESIS' */ + .str = {0xc3, 0xa4, 0x00}, + .dec = {0x61, 0xcc, 0x88, 0x00}, + }, + { + /* 'LATIN SMALL LETTER LJ' decomposes to + 'LETTER L' + 'LETTER J' */ + .str = {0xC7, 0x89, 0x00}, + .dec = {0x6c, 0x6a, 0x00}, + }, + { + /* GREEK ANO TELEIA decomposes to MIDDLE DOT */ + .str = {0xCE, 0x87, 0x00}, + .dec = {0xC2, 0xB7, 0x00} + }, + /* Canonical ordering */ + { + /* A + 'COMBINING ACUTE ACCENT' + 'COMBINING OGONEK' decomposes + to A + 'COMBINING OGONEK' + 'COMBINING ACUTE ACCENT' */ + .str = {0x41, 0xcc, 0x81, 0xcc, 0xa8, 0x0}, + .dec = {0x41, 0xcc, 0xa8, 0xcc, 0x81, 0x0}, + }, + { + /* 'LATIN SMALL LETTER A WITH DIAERESIS' + 'COMBINING OGONEK' + decomposes to + 'LETTER A' + 'COMBINING OGONEK' + 'COMBINING DIAERESIS' */ + .str = {0xc3, 0xa4, 0xCC, 0xA8, 0x00}, + + .dec = {0x61, 0xCC, 0xA8, 0xcc, 0x88, 0x00}, + }, + +}; + +const static struct { + /* UTF-8 strings in this vector _must_ be NULL-terminated. */ + unsigned char str[30]; + unsigned char ncf[30]; +} nfkdicf_test_data[] = { + /* Trivial sequences */ + { + /* "ABba" folds to lowercase */ + .str = {0x41, 0x42, 0x62, 0x61, 0x00}, + .ncf = {0x61, 0x62, 0x62, 0x61, 0x00}, + }, + { + /* All ASCII folds to lower-case */ + .str = "ABCDEFGHIJKLMNOPRSTUVWXYZ0.1", + .ncf = "abcdefghijklmnoprstuvwxyz0.1", + }, + { + /* LATIN SMALL LETTER SHARP S folds to + LATIN SMALL LETTER S + LATIN SMALL LETTER S */ + .str = {0xc3, 0x9f, 0x00}, + .ncf = {0x73, 0x73, 0x00}, + }, + { + /* LATIN CAPITAL LETTER A WITH RING ABOVE folds to + LATIN SMALL LETTER A + COMBINING RING ABOVE */ + .str = {0xC3, 0x85, 0x00}, + .ncf = {0x61, 0xcc, 0x8a, 0x00}, + }, + /* Introduced by UTF-8.0.0. */ + /* Cherokee letters are interesting test-cases because they fold + to upper-case. Before 8.0.0, Cherokee lowercase were + undefined, thus, the folding from LC is not stable between + 7.0.0 -> 8.0.0, but it is from UC. */ + { + /* CHEROKEE SMALL LETTER A folds to CHEROKEE LETTER A */ + .str = {0xea, 0xad, 0xb0, 0x00}, + .ncf = {0xe1, 0x8e, 0xa0, 0x00}, + }, + { + /* CHEROKEE SMALL LETTER YE folds to CHEROKEE LETTER YE */ + .str = {0xe1, 0x8f, 0xb8, 0x00}, + .ncf = {0xe1, 0x8f, 0xb0, 0x00}, + }, + { + /* OLD HUNGARIAN CAPITAL LETTER AMB folds to + OLD HUNGARIAN SMALL LETTER AMB */ + .str = {0xf0, 0x90, 0xb2, 0x83, 0x00}, + .ncf = {0xf0, 0x90, 0xb3, 0x83, 0x00}, + }, + /* Introduced by UTF-9.0.0. */ + { + /* OSAGE CAPITAL LETTER CHA folds to + OSAGE SMALL LETTER CHA */ + .str = {0xf0, 0x90, 0x92, 0xb5, 0x00}, + .ncf = {0xf0, 0x90, 0x93, 0x9d, 0x00}, + }, + { + /* LATIN CAPITAL LETTER SMALL CAPITAL I folds to + LATIN LETTER SMALL CAPITAL I */ + .str = {0xea, 0x9e, 0xae, 0x00}, + .ncf = {0xc9, 0xaa, 0x00}, + }, +}; + +static void check_utf8_nfkdi(void) +{ + int i; + struct utf8cursor u8c; + const struct utf8data *data; + + data = utf8nfkdi(UNICODE_AGE(latest_maj, latest_min, latest_rev)); + if (!data) { + pr_err("%s: Unable to load Unicode %d.%d.%d. Skipping.\n", + __func__, latest_maj, latest_min, latest_rev); + return; + } + + for (i = 0; i < ARRAY_SIZE(nfkdi_test_data); i++) { + int len = strlen(nfkdi_test_data[i].str); + int nlen = strlen(nfkdi_test_data[i].dec); + int j = 0; + unsigned char c; + + test((utf8len(data, nfkdi_test_data[i].str) == nlen)); + test((utf8nlen(data, nfkdi_test_data[i].str, len) == nlen)); + + if (utf8cursor(&u8c, data, nfkdi_test_data[i].str) < 0) + pr_err("can't create cursor\n"); + + while ((c = utf8byte(&u8c)) > 0) { + test_f((c == nfkdi_test_data[i].dec[j]), + "Unexpected byte 0x%x should be 0x%x\n", + c, nfkdi_test_data[i].dec[j]); + j++; + } + + test((j == nlen)); + } +} + +static void check_utf8_nfkdicf(void) +{ + int i; + struct utf8cursor u8c; + const struct utf8data *data; + + data = utf8nfkdicf(UNICODE_AGE(latest_maj, latest_min, latest_rev)); + if (!data) { + pr_err("%s: Unable to load Unicode %d.%d.%d. Skipping.\n", + __func__, latest_maj, latest_min, latest_rev); + return; + } + + for (i = 0; i < ARRAY_SIZE(nfkdicf_test_data); i++) { + int len = strlen(nfkdicf_test_data[i].str); + int nlen = strlen(nfkdicf_test_data[i].ncf); + int j = 0; + unsigned char c; + + test((utf8len(data, nfkdicf_test_data[i].str) == nlen)); + test((utf8nlen(data, nfkdicf_test_data[i].str, len) == nlen)); + + if (utf8cursor(&u8c, data, nfkdicf_test_data[i].str) < 0) + pr_err("can't create cursor\n"); + + while ((c = utf8byte(&u8c)) > 0) { + test_f((c == nfkdicf_test_data[i].ncf[j]), + "Unexpected byte 0x%x should be 0x%x\n", + c, nfkdicf_test_data[i].ncf[j]); + j++; + } + + test((j == nlen)); + } +} + +static void check_utf8_comparisons(void) +{ + int i; + const struct charset *charset = charset_load("utf8-10.0.0"); + + if(!charset) { + pr_err("%s: Unable to load Unicode %d.%d.%d. Skipping.\n", + __func__, latest_maj, latest_min, latest_rev); + return; + } + + for (i = 0; i < ARRAY_SIZE(nfkdi_test_data); i++) { + const char *s1 = nfkdi_test_data[i].str; + const char *s2 = nfkdi_test_data[i].dec; + + test_f(!charset_strncmp(charset, s1, strlen(s1), s2, strlen(s2)), + "%s %s comparison mismatch\n", s1, s2); + } + for (i = 0; i < ARRAY_SIZE(nfkdicf_test_data); i++) { + const char *s1 = nfkdicf_test_data[i].str; + const char *s2 = nfkdicf_test_data[i].ncf; + + test_f(!charset_strncasecmp(charset, s1, strlen(s1), + s2, strlen(s2)), + "%s %s comparison mismatch\n", s1, s2); + } + +} + +static void check_supported_versions(void) +{ + /* Unicode 7.0.0 should be supported. */ + test(utf8version_is_supported(7, 0, 0)); + + /* Unicode 9.0.0 should be supported. */ + test(utf8version_is_supported(9, 0, 0)); + + /* Unicode 10.0.0 (the latest version) should be supported. */ + test(utf8version_is_supported(latest_maj, latest_min, latest_rev)); + + /* Next versions don't exist. */ + test(!utf8version_is_supported(11, 0, 0)); + test(!utf8version_is_supported(0, 0, 0)); + test(!utf8version_is_supported(-1, -1, -1)); +} + +static int __init init_test_ucd(void) +{ + failed_tests = 0; + total_tests = 0; + + check_supported_versions(); + check_utf8_nfkdi(); + check_utf8_nfkdicf(); + check_utf8_comparisons(); + + if (!failed_tests) + pr_info("All %u tests passed\n", total_tests); + else + pr_err("%u out of %u tests failed\n", failed_tests, + total_tests); + return 0; +} + +static void __exit exit_test_ucd(void) +{ +} + +module_init(init_test_ucd); +module_exit(exit_test_ucd); + +MODULE_AUTHOR("Gabriel Krisman Bertazi "); +MODULE_LICENSE("GPL"); -- 2.15.1