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Diffstat (limited to 'gnulib-tests/test-regex.c')
| -rw-r--r-- | gnulib-tests/test-regex.c | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/gnulib-tests/test-regex.c b/gnulib-tests/test-regex.c new file mode 100644 index 0000000..22b6390 --- /dev/null +++ b/gnulib-tests/test-regex.c @@ -0,0 +1,488 @@ +/* Test regular expressions + Copyright 1996-2001, 2003-2022 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + 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. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +#include <config.h> + +#include "regex.h" + +#include <locale.h> +#include <limits.h> +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <wctype.h> +#if HAVE_DECL_ALARM +# include <unistd.h> +# include <signal.h> +#endif + +#include "localcharset.h" + +static int exit_status; + +static void +report_error (char const *format, ...) +{ + va_list args; + va_start (args, format); + fprintf (stderr, "test-regex: "); + vfprintf (stderr, format, args); + fprintf (stderr, "\n"); + va_end (args); + exit_status = 1; +} + +/* Check whether it's really a UTF-8 locale. + On mingw, setlocale (LC_ALL, "en_US.UTF-8") succeeds but returns + "English_United States.1252", with locale_charset () returning "CP1252". */ +static int +really_utf8 (void) +{ + return strcmp (locale_charset (), "UTF-8") == 0; +} + +/* Tests supposed to match; copied from glibc posix/bug-regex11.c. */ +static struct +{ + const char *pattern; + const char *string; + int flags, nmatch; + regmatch_t rm[5]; +} const tests[] = { + /* Test for newline handling in regex. */ + { "[^~]*~", "\nx~y", 0, 2, { { 0, 3 }, { -1, -1 } } }, + /* Other tests. */ + { "a(.*)b", "a b", REG_EXTENDED, 2, { { 0, 3 }, { 1, 2 } } }, + { ".*|\\([KIO]\\)\\([^|]*\\).*|?[KIO]", "10~.~|P|K0|I10|O16|?KSb", 0, 3, + { { 0, 21 }, { 15, 16 }, { 16, 18 } } }, + { ".*|\\([KIO]\\)\\([^|]*\\).*|?\\1", "10~.~|P|K0|I10|O16|?KSb", 0, 3, + { { 0, 21 }, { 8, 9 }, { 9, 10 } } }, + { "^\\(a*\\)\\1\\{9\\}\\(a\\{0,9\\}\\)\\([0-9]*;.*[^a]\\2\\([0-9]\\)\\)", + "a1;;0a1aa2aaa3aaaa4aaaaa5aaaaaa6aaaaaaa7aaaaaaaa8aaaaaaaaa9aa2aa1a0", 0, + 5, { { 0, 67 }, { 0, 0 }, { 0, 1 }, { 1, 67 }, { 66, 67 } } }, + /* Test for BRE expression anchoring. POSIX says just that this may match; + in glibc regex it always matched, so avoid changing it. */ + { "\\(^\\|foo\\)bar", "bar", 0, 2, { { 0, 3 }, { -1, -1 } } }, + { "\\(foo\\|^\\)bar", "bar", 0, 2, { { 0, 3 }, { -1, -1 } } }, + /* In ERE this must be treated as an anchor. */ + { "(^|foo)bar", "bar", REG_EXTENDED, 2, { { 0, 3 }, { -1, -1 } } }, + { "(foo|^)bar", "bar", REG_EXTENDED, 2, { { 0, 3 }, { -1, -1 } } }, + /* Here ^ cannot be treated as an anchor according to POSIX. */ + { "(^|foo)bar", "(^|foo)bar", 0, 2, { { 0, 10 }, { -1, -1 } } }, + { "(foo|^)bar", "(foo|^)bar", 0, 2, { { 0, 10 }, { -1, -1 } } }, + /* More tests on backreferences. */ + { "()\\1", "x", REG_EXTENDED, 2, { { 0, 0 }, { 0, 0 } } }, + { "()x\\1", "x", REG_EXTENDED, 2, { { 0, 1 }, { 0, 0 } } }, + { "()\\1*\\1*", "", REG_EXTENDED, 2, { { 0, 0 }, { 0, 0 } } }, + { "([0-9]).*\\1(a*)", "7;7a6", REG_EXTENDED, 3, { { 0, 4 }, { 0, 1 }, { 3, 4 } } }, + { "([0-9]).*\\1(a*)", "7;7a", REG_EXTENDED, 3, { { 0, 4 }, { 0, 1 }, { 3, 4 } } }, + { "(b)()c\\1", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 1 }, { 1, 1 } } }, + { "()(b)c\\2", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 0 }, { 0, 1 } } }, + { "a(b)()c\\1", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 2 }, { 2, 2 } } }, + { "a()(b)c\\2", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 1 }, { 1, 2 } } }, + { "()(b)\\1c\\2", "bcb", REG_EXTENDED, 3, { { 0, 3 }, { 0, 0 }, { 0, 1 } } }, + { "(b())\\2\\1", "bbbb", REG_EXTENDED, 3, { { 0, 2 }, { 0, 1 }, { 1, 1 } } }, + { "a()(b)\\1c\\2", "abcb", REG_EXTENDED, 3, { { 0, 4 }, { 1, 1 }, { 1, 2 } } }, + { "a()d(b)\\1c\\2", "adbcb", REG_EXTENDED, 3, { { 0, 5 }, { 1, 1 }, { 2, 3 } } }, + { "a(b())\\2\\1", "abbbb", REG_EXTENDED, 3, { { 0, 3 }, { 1, 2 }, { 2, 2 } } }, + { "(bb())\\2\\1", "bbbb", REG_EXTENDED, 3, { { 0, 4 }, { 0, 2 }, { 2, 2 } } }, + { "^([^,]*),\\1,\\1$", "a,a,a", REG_EXTENDED, 2, { { 0, 5 }, { 0, 1 } } }, + { "^([^,]*),\\1,\\1$", "ab,ab,ab", REG_EXTENDED, 2, { { 0, 8 }, { 0, 2 } } }, + { "^([^,]*),\\1,\\1,\\1$", "abc,abc,abc,abc", REG_EXTENDED, 2, + { { 0, 15 }, { 0, 3 } } }, + { "^(.?)(.?)(.?)(.?)(.?).?\\5\\4\\3\\2\\1$", + "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } }, + { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$", + "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } }, + { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$", + "abcdedcba", REG_EXTENDED, 1, { { 0, 9 } } }, + { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$|^.?$", + "ababababa", REG_EXTENDED, 1, { { 0, 9 } } }, + { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$", + "level", REG_NOSUB | REG_EXTENDED, 0, { { -1, -1 } } }, + { "^(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?).?\\9\\8\\7\\6\\5\\4\\3\\2\\1$", + "ababababa", REG_EXTENDED, 1, { { 0, 9 } } }, + /* Test for *+ match. */ + { "^a*+(.)", "ab", REG_EXTENDED, 2, { { 0, 2 }, { 1, 2 } } }, + /* Test for ** match. */ + { "^(a*)*(.)", "ab", REG_EXTENDED, 3, { { 0, 2 }, { 0, 1 }, { 1, 2 } } }, +}; + +static void +bug_regex11 (void) +{ + regex_t re; + regmatch_t rm[5]; + size_t i; + int n; + + for (i = 0; i < sizeof (tests) / sizeof (tests[0]); ++i) + { + n = regcomp (&re, tests[i].pattern, tests[i].flags); + if (n != 0) + { + char buf[500]; + regerror (n, &re, buf, sizeof (buf)); + report_error ("%s: regcomp %zd failed: %s", tests[i].pattern, i, buf); + continue; + } + + if (regexec (&re, tests[i].string, tests[i].nmatch, rm, 0)) + { + report_error ("%s: regexec %zd failed", tests[i].pattern, i); + regfree (&re); + continue; + } + + for (n = 0; n < tests[i].nmatch; ++n) + if (rm[n].rm_so != tests[i].rm[n].rm_so + || rm[n].rm_eo != tests[i].rm[n].rm_eo) + { + if (tests[i].rm[n].rm_so == -1 && tests[i].rm[n].rm_eo == -1) + break; + report_error ("%s: regexec %zd match failure rm[%d] %d..%d", + tests[i].pattern, i, n, + (int) rm[n].rm_so, (int) rm[n].rm_eo); + break; + } + + regfree (&re); + } +} + +int +main (void) +{ + static struct re_pattern_buffer regex; + unsigned char folded_chars[UCHAR_MAX + 1]; + int i; + const char *s; + struct re_registers regs; + +#if HAVE_DECL_ALARM + /* In case a bug causes glibc to go into an infinite loop. + The tests should take less than 10 s on a reasonably modern CPU. */ + int alarm_value = 1000; + signal (SIGALRM, SIG_DFL); + alarm (alarm_value); +#endif + + bug_regex11 (); + + if (setlocale (LC_ALL, "en_US.UTF-8")) + { + { + /* https://sourceware.org/ml/libc-hacker/2006-09/msg00008.html + This test needs valgrind to catch the bug on Debian + GNU/Linux 3.1 x86, but it might catch the bug better + on other platforms and it shouldn't hurt to try the + test here. */ + static char const pat[] = "insert into"; + static char const data[] = + "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK"; + re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE + | RE_ICASE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern (pat, sizeof pat - 1, ®ex); + if (s) + report_error ("%s: %s", pat, s); + else + { + memset (®s, 0, sizeof regs); + i = re_search (®ex, data, sizeof data - 1, + 0, sizeof data - 1, ®s); + if (i != -1) + report_error ("re_search '%s' on '%s' returned %d", + pat, data, i); + regfree (®ex); + free (regs.start); + free (regs.end); + } + } + + if (really_utf8 ()) + { + /* This test is from glibc bug 15078. + The test case is from Andreas Schwab in + <https://sourceware.org/ml/libc-alpha/2013-01/msg00967.html>. + */ + static char const pat[] = "[^x]x"; + static char const data[] = + /* <U1000><U103B><U103D><U1014><U103A><U102F><U1015><U103A> */ + "\xe1\x80\x80" + "\xe1\x80\xbb" + "\xe1\x80\xbd" + "\xe1\x80\x94" + "\xe1\x80\xba" + "\xe1\x80\xaf" + "\xe1\x80\x95" + "\xe1\x80\xba" + "x"; + re_set_syntax (0); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern (pat, sizeof pat - 1, ®ex); + if (s) + report_error ("%s: %s", pat, s); + else + { + memset (®s, 0, sizeof regs); + i = re_search (®ex, data, sizeof data - 1, + 0, sizeof data - 1, 0); + if (i != 0 && i != 21) + report_error ("re_search '%s' on '%s' returned %d", + pat, data, i); + regfree (®ex); + free (regs.start); + free (regs.end); + } + } + + if (! setlocale (LC_ALL, "C")) + { + report_error ("setlocale \"C\" failed"); + return exit_status; + } + } + + if (setlocale (LC_ALL, "tr_TR.UTF-8")) + { + if (really_utf8 () && towupper (L'i') == 0x0130 /* U+0130; see below. */) + { + re_set_syntax (RE_SYNTAX_GREP | RE_ICASE); + memset (®ex, 0, sizeof regex); + static char const pat[] = "i"; + s = re_compile_pattern (pat, sizeof pat - 1, ®ex); + if (s) + report_error ("%s: %s", pat, s); + else + { + /* UTF-8 encoding of U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE. + In Turkish, this is the upper-case equivalent of ASCII "i". + Older versions of Gnulib failed to match "i" to U+0130 when + ignoring case in Turkish <https://bugs.gnu.org/43577>. */ + static char const data[] = "\xc4\xb0"; + + memset (®s, 0, sizeof regs); + i = re_search (®ex, data, sizeof data - 1, 0, sizeof data - 1, + ®s); + if (i != 0) + report_error ("re_search '%s' on '%s' returned %d", + pat, data, i); + regfree (®ex); + free (regs.start); + free (regs.end); + } + } + + if (! setlocale (LC_ALL, "C")) + { + report_error ("setlocale \"C\" failed"); + return exit_status; + } + } + + /* This test is from glibc bug 3957, reported by Andrew Mackey. */ + re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE); + memset (®ex, 0, sizeof regex); + static char const pat_3957[] = "a[^x]b"; + s = re_compile_pattern (pat_3957, sizeof pat_3957 - 1, ®ex); + if (s) + report_error ("%s: %s", pat_3957, s); + else + { + /* This should fail, but succeeds for glibc-2.5. */ + memset (®s, 0, sizeof regs); + static char const data[] = "a\nb"; + i = re_search (®ex, data, sizeof data - 1, 0, sizeof data - 1, ®s); + if (i != -1) + report_error ("re_search '%s' on '%s' returned %d", + pat_3957, data, i); + regfree (®ex); + free (regs.start); + free (regs.end); + } + + /* This regular expression is from Spencer ere test number 75 + in grep-2.3. */ + re_set_syntax (RE_SYNTAX_POSIX_EGREP); + memset (®ex, 0, sizeof regex); + for (i = 0; i <= UCHAR_MAX; i++) + folded_chars[i] = i; + regex.translate = folded_chars; + static char const pat75[] = "a[[:@:>@:]]b\n"; + s = re_compile_pattern (pat75, sizeof pat75 - 1, ®ex); + /* This should fail with _Invalid character class name_ error. */ + if (!s) + { + report_error ("re_compile_pattern: failed to reject '%s'", pat75); + regfree (®ex); + } + + /* Ensure that [b-a] is diagnosed as invalid, when + using RE_NO_EMPTY_RANGES. */ + re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES); + memset (®ex, 0, sizeof regex); + static char const pat_b_a[] = "a[b-a]"; + s = re_compile_pattern (pat_b_a, sizeof pat_b_a - 1, ®ex); + if (s == 0) + { + report_error ("re_compile_pattern: failed to reject '%s'", pat_b_a); + regfree (®ex); + } + + /* This should succeed, but does not for glibc-2.1.3. */ + memset (®ex, 0, sizeof regex); + static char const pat_213[] = "{1"; + s = re_compile_pattern (pat_213, sizeof pat_213 - 1, ®ex); + if (s) + report_error ("%s: %s", pat_213, s); + else + regfree (®ex); + + /* The following example is derived from a problem report + against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */ + memset (®ex, 0, sizeof regex); + static char const pat_stolfi[] = "[an\371]*n"; + s = re_compile_pattern (pat_stolfi, sizeof pat_stolfi - 1, ®ex); + if (s) + report_error ("%s: %s", pat_stolfi, s); + /* This should match, but does not for glibc-2.2.1. */ + else + { + memset (®s, 0, sizeof regs); + static char const data[] = "an"; + i = re_match (®ex, data, sizeof data - 1, 0, ®s); + if (i != 2) + report_error ("re_match '%s' on '%s' at 2 returned %d", + pat_stolfi, data, i); + regfree (®ex); + free (regs.start); + free (regs.end); + } + + memset (®ex, 0, sizeof regex); + static char const pat_x[] = "x"; + s = re_compile_pattern (pat_x, sizeof pat_x - 1, ®ex); + if (s) + report_error ("%s: %s", pat_x, s); + /* glibc-2.2.93 does not work with a negative RANGE argument. */ + else + { + memset (®s, 0, sizeof regs); + static char const data[] = "wxy"; + i = re_search (®ex, data, sizeof data - 1, 2, -2, ®s); + if (i != 1) + report_error ("re_search '%s' on '%s' returned %d", pat_x, data, i); + regfree (®ex); + free (regs.start); + free (regs.end); + } + + /* The version of regex.c in older versions of gnulib + ignored RE_ICASE. Detect that problem too. */ + re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern (pat_x, 1, ®ex); + if (s) + report_error ("%s: %s", pat_x, s); + else + { + memset (®s, 0, sizeof regs); + static char const data[] = "WXY"; + i = re_search (®ex, data, sizeof data - 1, 0, 3, ®s); + if (i < 0) + report_error ("re_search '%s' on '%s' returned %d", pat_x, data, i); + regfree (®ex); + 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; +} |