488 lines
18 KiB
C
488 lines
18 KiB
C
/* Test regular expressions
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Copyright 1996-2001, 2003-2025 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include "regex.h"
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#include <locale.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wctype.h>
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#if HAVE_DECL_ALARM
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# include <unistd.h>
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# include <signal.h>
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#endif
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#include "localcharset.h"
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static int exit_status;
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static void
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report_error (char const *format, ...)
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{
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va_list args;
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va_start (args, format);
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fprintf (stderr, "test-regex: ");
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vfprintf (stderr, format, args);
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fprintf (stderr, "\n");
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va_end (args);
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exit_status = 1;
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}
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/* Check whether it's really a UTF-8 locale.
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On mingw, setlocale (LC_ALL, "en_US.UTF-8") succeeds but returns
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"English_United States.1252", with locale_charset () returning "CP1252". */
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static int
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really_utf8 (void)
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{
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return strcmp (locale_charset (), "UTF-8") == 0;
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}
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/* Tests supposed to match; copied from glibc posix/bug-regex11.c. */
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static struct
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{
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const char *pattern;
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const char *string;
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int flags, nmatch;
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regmatch_t rm[5];
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} const tests[] = {
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/* Test for newline handling in regex. */
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{ "[^~]*~", "\nx~y", 0, 2, { { 0, 3 }, { -1, -1 } } },
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/* Other tests. */
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{ "a(.*)b", "a b", REG_EXTENDED, 2, { { 0, 3 }, { 1, 2 } } },
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{ ".*|\\([KIO]\\)\\([^|]*\\).*|?[KIO]", "10~.~|P|K0|I10|O16|?KSb", 0, 3,
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{ { 0, 21 }, { 15, 16 }, { 16, 18 } } },
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{ ".*|\\([KIO]\\)\\([^|]*\\).*|?\\1", "10~.~|P|K0|I10|O16|?KSb", 0, 3,
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{ { 0, 21 }, { 8, 9 }, { 9, 10 } } },
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{ "^\\(a*\\)\\1\\{9\\}\\(a\\{0,9\\}\\)\\([0-9]*;.*[^a]\\2\\([0-9]\\)\\)",
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"a1;;0a1aa2aaa3aaaa4aaaaa5aaaaaa6aaaaaaa7aaaaaaaa8aaaaaaaaa9aa2aa1a0", 0,
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5, { { 0, 67 }, { 0, 0 }, { 0, 1 }, { 1, 67 }, { 66, 67 } } },
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/* Test for BRE expression anchoring. POSIX says just that this may match;
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in glibc regex it always matched, so avoid changing it. */
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{ "\\(^\\|foo\\)bar", "bar", 0, 2, { { 0, 3 }, { -1, -1 } } },
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{ "\\(foo\\|^\\)bar", "bar", 0, 2, { { 0, 3 }, { -1, -1 } } },
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/* In ERE this must be treated as an anchor. */
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{ "(^|foo)bar", "bar", REG_EXTENDED, 2, { { 0, 3 }, { -1, -1 } } },
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{ "(foo|^)bar", "bar", REG_EXTENDED, 2, { { 0, 3 }, { -1, -1 } } },
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/* Here ^ cannot be treated as an anchor according to POSIX. */
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{ "(^|foo)bar", "(^|foo)bar", 0, 2, { { 0, 10 }, { -1, -1 } } },
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{ "(foo|^)bar", "(foo|^)bar", 0, 2, { { 0, 10 }, { -1, -1 } } },
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/* More tests on backreferences. */
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{ "()\\1", "x", REG_EXTENDED, 2, { { 0, 0 }, { 0, 0 } } },
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{ "()x\\1", "x", REG_EXTENDED, 2, { { 0, 1 }, { 0, 0 } } },
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{ "()\\1*\\1*", "", REG_EXTENDED, 2, { { 0, 0 }, { 0, 0 } } },
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{ "([0-9]).*\\1(a*)", "7;7a6", REG_EXTENDED, 3, { { 0, 4 }, { 0, 1 }, { 3, 4 } } },
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{ "([0-9]).*\\1(a*)", "7;7a", REG_EXTENDED, 3, { { 0, 4 }, { 0, 1 }, { 3, 4 } } },
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{ "(b)()c\\1", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 1 }, { 1, 1 } } },
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{ "()(b)c\\2", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 0 }, { 0, 1 } } },
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{ "a(b)()c\\1", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 2 }, { 2, 2 } } },
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{ "a()(b)c\\2", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 1 }, { 1, 2 } } },
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{ "()(b)\\1c\\2", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 0 }, { 0, 1 } } },
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{ "(b())\\2\\1", "bbbb", REG_EXTENDED, 3, { { 0, 2 }, { 0, 1 }, { 1, 1 } } },
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{ "a()(b)\\1c\\2", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 1 }, { 1, 2 } } },
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{ "a()d(b)\\1c\\2", "adbcb", REG_EXTENDED, 3, { { 0, 5 }, { 1, 1 }, { 2, 3 } } },
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{ "a(b())\\2\\1", "abbbb", REG_EXTENDED, 3, { { 0, 3 }, { 1, 2 }, { 2, 2 } } },
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{ "(bb())\\2\\1", "bbbb", REG_EXTENDED, 3, { { 0, 4 }, { 0, 2 }, { 2, 2 } } },
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{ "^([^,]*),\\1,\\1$", "a,a,a", REG_EXTENDED, 2, { { 0, 5 }, { 0, 1 } } },
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{ "^([^,]*),\\1,\\1$", "ab,ab,ab", REG_EXTENDED, 2, { { 0, 8 }, { 0, 2 } } },
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{ "^([^,]*),\\1,\\1,\\1$", "abc,abc,abc,abc", REG_EXTENDED, 2,
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{ { 0, 15 }, { 0, 3 } } },
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{ "^(.?)(.?)(.?)(.?)(.?).?\\5\\4\\3\\2\\1$",
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"level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
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{ "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
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"level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
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{ "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
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"abcdedcba", REG_EXTENDED, 1, { { 0, 9 } } },
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{ "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$",
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"ababababa", REG_EXTENDED, 1, { { 0, 9 } } },
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{ "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$",
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"level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } },
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{ "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$",
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"ababababa", REG_EXTENDED, 1, { { 0, 9 } } },
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/* Test for *+ match. */
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{ "^a*+(.)", "ab", REG_EXTENDED, 2, { { 0, 2 }, { 1, 2 } } },
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/* Test for ** match. */
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{ "^(a*)*(.)", "ab", REG_EXTENDED, 3, { { 0, 2 }, { 0, 1 }, { 1, 2 } } },
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};
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static void
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bug_regex11 (void)
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{
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regex_t re;
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regmatch_t rm[5];
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size_t i;
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int n;
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for (i = 0; i < sizeof (tests) / sizeof (tests[0]); ++i)
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{
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n = regcomp (&re, tests[i].pattern, tests[i].flags);
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if (n != 0)
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{
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char buf[500];
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regerror (n, &re, buf, sizeof (buf));
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report_error ("%s: regcomp %zd failed: %s", tests[i].pattern, i, buf);
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continue;
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}
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if (regexec (&re, tests[i].string, tests[i].nmatch, rm, 0))
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{
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report_error ("%s: regexec %zd failed", tests[i].pattern, i);
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regfree (&re);
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continue;
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}
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for (n = 0; n < tests[i].nmatch; ++n)
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if (rm[n].rm_so != tests[i].rm[n].rm_so
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|| rm[n].rm_eo != tests[i].rm[n].rm_eo)
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{
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if (tests[i].rm[n].rm_so == -1 && tests[i].rm[n].rm_eo == -1)
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break;
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report_error ("%s: regexec %zd match failure rm[%d] %d..%d",
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tests[i].pattern, i, n,
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(int) rm[n].rm_so, (int) rm[n].rm_eo);
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break;
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}
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regfree (&re);
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}
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}
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int
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main (void)
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{
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static struct re_pattern_buffer regex;
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unsigned char folded_chars[UCHAR_MAX + 1];
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int i;
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const char *s;
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struct re_registers regs;
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#if HAVE_DECL_ALARM
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/* In case a bug causes glibc to go into an infinite loop.
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The tests should take less than 10 s on a reasonably modern CPU. */
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int alarm_value = 1000;
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signal (SIGALRM, SIG_DFL);
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alarm (alarm_value);
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#endif
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bug_regex11 ();
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if (setlocale (LC_ALL, "en_US.UTF-8"))
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{
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{
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/* https://sourceware.org/ml/libc-hacker/2006-09/msg00008.html
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This test needs valgrind to catch the bug on Debian
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GNU/Linux 3.1 x86, but it might catch the bug better
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on other platforms and it shouldn't hurt to try the
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test here. */
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static char const pat[] = "insert into";
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static char const data[] =
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"\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK";
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re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE
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| RE_ICASE);
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memset (®ex, 0, sizeof regex);
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s = re_compile_pattern (pat, sizeof pat - 1, ®ex);
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if (s)
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report_error ("%s: %s", pat, s);
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else
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{
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memset (®s, 0, sizeof regs);
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i = re_search (®ex, data, sizeof data - 1,
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0, sizeof data - 1, ®s);
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if (i != -1)
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report_error ("re_search '%s' on '%s' returned %d",
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pat, data, i);
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regfree (®ex);
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free (regs.start);
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free (regs.end);
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}
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}
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if (really_utf8 ())
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{
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/* This test is from glibc bug 15078.
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The test case is from Andreas Schwab in
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<https://sourceware.org/ml/libc-alpha/2013-01/msg00967.html>.
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*/
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static char const pat[] = "[^x]x";
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static char const data[] =
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/* <U1000><U103B><U103D><U1014><U103A><U102F><U1015><U103A> */
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"\xe1\x80\x80"
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"\xe1\x80\xbb"
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"\xe1\x80\xbd"
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"\xe1\x80\x94"
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"\xe1\x80\xba"
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"\xe1\x80\xaf"
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"\xe1\x80\x95"
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"\xe1\x80\xba"
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"x";
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re_set_syntax (0);
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memset (®ex, 0, sizeof regex);
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s = re_compile_pattern (pat, sizeof pat - 1, ®ex);
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if (s)
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report_error ("%s: %s", pat, s);
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else
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{
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memset (®s, 0, sizeof regs);
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i = re_search (®ex, data, sizeof data - 1,
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0, sizeof data - 1, NULL);
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if (i != 0 && i != 21)
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report_error ("re_search '%s' on '%s' returned %d",
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pat, data, i);
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regfree (®ex);
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free (regs.start);
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free (regs.end);
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}
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}
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if (! setlocale (LC_ALL, "C"))
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{
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report_error ("setlocale \"C\" failed");
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return exit_status;
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}
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}
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if (setlocale (LC_ALL, "tr_TR.UTF-8"))
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{
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if (really_utf8 () && towupper (L'i') == 0x0130 /* U+0130; see below. */)
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{
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re_set_syntax (RE_SYNTAX_GREP | RE_ICASE);
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memset (®ex, 0, sizeof regex);
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static char const pat[] = "i";
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s = re_compile_pattern (pat, sizeof pat - 1, ®ex);
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if (s)
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report_error ("%s: %s", pat, s);
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else
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{
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/* UTF-8 encoding of U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE.
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In Turkish, this is the upper-case equivalent of ASCII "i".
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Older versions of Gnulib failed to match "i" to U+0130 when
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ignoring case in Turkish <https://bugs.gnu.org/43577>. */
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static char const data[] = "\xc4\xb0";
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memset (®s, 0, sizeof regs);
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i = re_search (®ex, data, sizeof data - 1, 0, sizeof data - 1,
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®s);
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if (i != 0)
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report_error ("re_search '%s' on '%s' returned %d",
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pat, data, i);
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regfree (®ex);
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free (regs.start);
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free (regs.end);
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}
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}
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if (! setlocale (LC_ALL, "C"))
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{
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report_error ("setlocale \"C\" failed");
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return exit_status;
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}
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}
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/* This test is from glibc bug 3957, reported by Andrew Mackey. */
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re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE);
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memset (®ex, 0, sizeof regex);
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static char const pat_3957[] = "a[^x]b";
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s = re_compile_pattern (pat_3957, sizeof pat_3957 - 1, ®ex);
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if (s)
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report_error ("%s: %s", pat_3957, s);
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else
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{
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/* This should fail, but succeeds for glibc-2.5. */
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memset (®s, 0, sizeof regs);
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static char const data[] = "a\nb";
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i = re_search (®ex, data, sizeof data - 1, 0, sizeof data - 1, ®s);
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if (i != -1)
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report_error ("re_search '%s' on '%s' returned %d",
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pat_3957, data, i);
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regfree (®ex);
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free (regs.start);
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free (regs.end);
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}
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/* This regular expression is from Spencer ere test number 75
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in grep-2.3. */
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re_set_syntax (RE_SYNTAX_POSIX_EGREP);
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memset (®ex, 0, sizeof regex);
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for (i = 0; i <= UCHAR_MAX; i++)
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folded_chars[i] = i;
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regex.translate = folded_chars;
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static char const pat75[] = "a[[:@:>@:]]b\n";
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s = re_compile_pattern (pat75, sizeof pat75 - 1, ®ex);
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/* This should fail with _Invalid character class name_ error. */
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if (!s)
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{
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report_error ("re_compile_pattern: failed to reject '%s'", pat75);
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regfree (®ex);
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}
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/* Ensure that [b-a] is diagnosed as invalid, when
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using RE_NO_EMPTY_RANGES. */
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re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES);
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memset (®ex, 0, sizeof regex);
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static char const pat_b_a[] = "a[b-a]";
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s = re_compile_pattern (pat_b_a, sizeof pat_b_a - 1, ®ex);
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if (s == NULL)
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{
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report_error ("re_compile_pattern: failed to reject '%s'", pat_b_a);
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regfree (®ex);
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}
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/* This should succeed, but does not for glibc-2.1.3. */
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memset (®ex, 0, sizeof regex);
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static char const pat_213[] = "{1";
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s = re_compile_pattern (pat_213, sizeof pat_213 - 1, ®ex);
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if (s)
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report_error ("%s: %s", pat_213, s);
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else
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regfree (®ex);
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/* The following example is derived from a problem report
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against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */
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memset (®ex, 0, sizeof regex);
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static char const pat_stolfi[] = "[an\371]*n";
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s = re_compile_pattern (pat_stolfi, sizeof pat_stolfi - 1, ®ex);
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if (s)
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report_error ("%s: %s", pat_stolfi, s);
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/* This should match, but does not for glibc-2.2.1. */
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else
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{
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memset (®s, 0, sizeof regs);
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static char const data[] = "an";
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i = re_match (®ex, data, sizeof data - 1, 0, ®s);
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if (i != 2)
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report_error ("re_match '%s' on '%s' at 2 returned %d",
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pat_stolfi, data, i);
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regfree (®ex);
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free (regs.start);
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free (regs.end);
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}
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memset (®ex, 0, sizeof regex);
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static char const pat_x[] = "x";
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s = re_compile_pattern (pat_x, sizeof pat_x - 1, ®ex);
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if (s)
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report_error ("%s: %s", pat_x, s);
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/* glibc-2.2.93 does not work with a negative RANGE argument. */
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else
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{
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memset (®s, 0, sizeof regs);
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static char const data[] = "wxy";
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i = re_search (®ex, data, sizeof data - 1, 2, -2, ®s);
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if (i != 1)
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report_error ("re_search '%s' on '%s' returned %d", pat_x, data, i);
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regfree (®ex);
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free (regs.start);
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free (regs.end);
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}
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/* The version of regex.c in older versions of gnulib
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ignored RE_ICASE. Detect that problem too. */
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re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
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memset (®ex, 0, sizeof regex);
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s = re_compile_pattern (pat_x, 1, ®ex);
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if (s)
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report_error ("%s: %s", pat_x, s);
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else
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{
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memset (®s, 0, sizeof regs);
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static char const data[] = "WXY";
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i = re_search (®ex, data, sizeof data - 1, 0, 3, ®s);
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if (i < 0)
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report_error ("re_search '%s' on '%s' returned %d", pat_x, data, i);
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regfree (®ex);
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|
free (regs.start);
|
|
free (regs.end);
|
|
}
|
|
|
|
/* glibc bug 11053. */
|
|
re_set_syntax (RE_SYNTAX_POSIX_BASIC);
|
|
memset (®ex, 0, sizeof regex);
|
|
static char const pat_sub2[] = "\\(a*\\)*a*\\1";
|
|
s = re_compile_pattern (pat_sub2, sizeof pat_sub2 - 1, ®ex);
|
|
if (s)
|
|
report_error ("%s: %s", pat_sub2, s);
|
|
else
|
|
{
|
|
memset (®s, 0, sizeof regs);
|
|
static char const data[] = "a";
|
|
int datalen = sizeof data - 1;
|
|
i = re_search (®ex, data, datalen, 0, datalen, ®s);
|
|
if (i != 0)
|
|
report_error ("re_search '%s' on '%s' returned %d", pat_sub2, data, i);
|
|
else if (regs.num_regs < 2)
|
|
report_error ("re_search '%s' on '%s' returned only %d registers",
|
|
pat_sub2, data, (int) regs.num_regs);
|
|
else if (! (regs.start[0] == 0 && regs.end[0] == 1))
|
|
report_error ("re_search '%s' on '%s' returned wrong match [%d,%d)",
|
|
pat_sub2, data, (int) regs.start[0], (int) regs.end[0]);
|
|
else if (! (regs.start[1] == 0 && regs.end[1] == 0))
|
|
report_error ("re_search '%s' on '%s' returned wrong submatch [%d,%d)",
|
|
pat_sub2, data, (int) regs.start[1], (int) regs.end[1]);
|
|
regfree (®ex);
|
|
free (regs.start);
|
|
free (regs.end);
|
|
}
|
|
|
|
/* Catch a bug reported by Vin Shelton in
|
|
https://lists.gnu.org/r/bug-coreutils/2007-06/msg00089.html
|
|
*/
|
|
re_set_syntax (RE_SYNTAX_POSIX_BASIC
|
|
& ~RE_CONTEXT_INVALID_DUP
|
|
& ~RE_NO_EMPTY_RANGES);
|
|
static char const pat_shelton[] = "[[:alnum:]_-]\\\\+$";
|
|
s = re_compile_pattern (pat_shelton, sizeof pat_shelton - 1, ®ex);
|
|
if (s)
|
|
report_error ("%s: %s", pat_shelton, s);
|
|
else
|
|
regfree (®ex);
|
|
|
|
/* REG_STARTEND was added to glibc on 2004-01-15.
|
|
Reject older versions. */
|
|
if (REG_STARTEND == 0)
|
|
report_error ("REG_STARTEND is zero");
|
|
|
|
/* Matching with the compiled form of this regexp would provoke
|
|
an assertion failure prior to glibc-2.28:
|
|
regexec.c:1375: pop_fail_stack: Assertion 'num >= 0' failed
|
|
With glibc-2.28, compilation fails and reports the invalid
|
|
back reference. */
|
|
re_set_syntax (RE_SYNTAX_POSIX_EGREP);
|
|
memset (®ex, 0, sizeof regex);
|
|
static char const pat_badback[] = "0|()0|\\1|0";
|
|
s = re_compile_pattern (pat_badback, sizeof pat_badback, ®ex);
|
|
if (!s && re_search (®ex, "x", 1, 0, 1, ®s) != -1)
|
|
s = "mishandled invalid back reference";
|
|
if (s && strcmp (s, "Invalid back reference") != 0)
|
|
report_error ("%s: %s", pat_badback, s);
|
|
|
|
#if 0
|
|
/* It would be nice to reject hosts whose regoff_t values are too
|
|
narrow (including glibc on hosts with 64-bit ptrdiff_t and
|
|
32-bit int), but we should wait until glibc implements this
|
|
feature. Otherwise, support for equivalence classes and
|
|
multibyte collation symbols would always be broken except
|
|
when compiling --without-included-regex. */
|
|
if (sizeof (regoff_t) < sizeof (ptrdiff_t)
|
|
|| sizeof (regoff_t) < sizeof (ssize_t))
|
|
report_error ("regoff_t values are too narrow");
|
|
#endif
|
|
|
|
return exit_status;
|
|
}
|