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glibc/posix/tst-regex.c
Carlos O'Donell 466f2be6c0 Add generic C.UTF-8 locale (Bug 17318) 
We add a new C.UTF-8 locale. This locale is not builtin to glibc, but
is provided as a distinct locale. The locale provides full support for
UTF-8 and this includes full code point sorting via STRCMP-based
collation (strcmp or wcscmp).

The collation uses a new keyword 'codepoint_collation' which drops all
collation rules and generates an empty zero rules collation to enable
STRCMP usage in collation. This ensures that we get full code point
sorting for C.UTF-8 with a minimal 1406 bytes of overhead (LC_COLLATE
structure information and ASCII collating tables).

The new locale is added to SUPPORTED. Minimal test data for specific
code points (minus those not supported by collate-test) is provided in
C.UTF-8.in, and this verifies code point sorting is working reasonably
across the range. The locale was tested manually with the full set of
code points without failure.

The locale is harmonized with locales already shipping in various
downstream distributions. A new tst-iconv9 test is added which verifies
the C.UTF-8 locale is generally usable.

Testing for fnmatch, regexec, and recomp is provided by extending
bug-regex1, bugregex19, bug-regex4, bug-regex6, transbug, tst-fnmatch,
tst-regcomp-truncated, and tst-regex to use C.UTF-8.

Tested on x86_64 or i686 without regression.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2021-09-06 11:30:28 -04:00

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/* Copyright (C) 2001-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <assert.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <getopt.h>
#include <iconv.h>
#include <locale.h>
#include <mcheck.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <regex.h>
#include <support/support.h>
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
static clockid_t cl;
static int use_clock;
#endif
static iconv_t cd;
static char *mem;
static char *umem;
static size_t memlen;
static size_t umemlen;
static int timing;
static int test_expr (const char *expr, int expected, int expectedicase);
static int run_test (const char *expr, const char *mem, size_t memlen,
int icase, int expected);
static int run_test_backwards (const char *expr, const char *mem,
size_t memlen, int icase, int expected);
static int
do_test (void)
{
const char *file;
int fd;
struct stat st;
int result = 0;
char *inmem;
char *outmem;
size_t inlen;
size_t outlen;
mtrace ();
/* Make the content of the file available in memory. */
file = "./tst-regex.input";
fd = open (file, O_RDONLY);
if (fd == -1)
error (EXIT_FAILURE, errno, "cannot open %s", basename (file));
if (fstat (fd, &st) != 0)
error (EXIT_FAILURE, errno, "cannot stat %s", basename (file));
memlen = st.st_size;
mem = (char *) malloc (memlen + 1);
if (mem == NULL)
error (EXIT_FAILURE, errno, "while allocating buffer");
if ((size_t) read (fd, mem, memlen) != memlen)
error (EXIT_FAILURE, 0, "cannot read entire file");
mem[memlen] = '\0';
close (fd);
/* We have to convert a few things from UTF-8 to Latin-1. */
cd = iconv_open ("ISO-8859-1", "UTF-8");
if (cd == (iconv_t) -1)
error (EXIT_FAILURE, errno, "cannot get conversion descriptor");
/* For the second test we have to convert the file content to Latin-1.
This cannot grow the data. */
umem = (char *) malloc (memlen + 1);
if (umem == NULL)
error (EXIT_FAILURE, errno, "while allocating buffer");
inmem = mem;
inlen = memlen;
outmem = umem;
outlen = memlen;
iconv (cd, &inmem, &inlen, &outmem, &outlen);
umemlen = outmem - umem;
if (inlen != 0)
error (EXIT_FAILURE, errno, "cannot convert buffer");
umem[umemlen] = '\0';
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
# if _POSIX_CPUTIME == 0
if (sysconf (_SC_CPUTIME) < 0)
use_clock = 0;
else
# endif
/* See whether we can use the CPU clock. */
use_clock = clock_getcpuclockid (0, &cl) == 0;
#endif
#ifdef DEBUG
re_set_syntax (RE_DEBUG);
#endif
/* Run the actual tests. All tests are run in a single-byte and a
multi-byte locale. */
result |= test_expr ("[äáàâéèêíìîñöóòôüúùû]", 4, 4);
result |= test_expr ("G.ran", 2, 3);
result |= test_expr ("G.\\{1\\}ran", 2, 3);
result |= test_expr ("G.*ran", 3, 44);
result |= test_expr ("[äáàâ]", 0, 0);
result |= test_expr ("Uddeborg", 2, 2);
result |= test_expr (".Uddeborg", 2, 2);
/* Free the resources. */
free (umem);
iconv_close (cd);
free (mem);
return result;
}
static int
test_expr (const char *expr, int expected, int expectedicase)
{
int result = 0;
char *inmem;
char *outmem;
size_t inlen;
size_t outlen;
char *uexpr;
/* First test: search with basic C.UTF-8 locale. */
printf ("INFO: Testing C.UTF-8.\n");
xsetlocale (LC_ALL, "C.UTF-8");
printf ("\nTest \"%s\" with multi-byte locale\n", expr);
result |= run_test (expr, mem, memlen, 0, expected);
printf ("\nTest \"%s\" with multi-byte locale, case insensitive\n", expr);
result |= run_test (expr, mem, memlen, 1, expectedicase);
printf ("\nTest \"%s\" backwards with multi-byte locale\n", expr);
result |= run_test_backwards (expr, mem, memlen, 0, expected);
printf ("\nTest \"%s\" backwards with multi-byte locale, case insensitive\n",
expr);
result |= run_test_backwards (expr, mem, memlen, 1, expectedicase);
/* Second test: search with an UTF-8 locale. */
printf ("INFO: Testing de_DE.UTF-8.\n");
xsetlocale (LC_ALL, "de_DE.UTF-8");
printf ("\nTest \"%s\" with multi-byte locale\n", expr);
result |= run_test (expr, mem, memlen, 0, expected);
printf ("\nTest \"%s\" with multi-byte locale, case insensitive\n", expr);
result |= run_test (expr, mem, memlen, 1, expectedicase);
printf ("\nTest \"%s\" backwards with multi-byte locale\n", expr);
result |= run_test_backwards (expr, mem, memlen, 0, expected);
printf ("\nTest \"%s\" backwards with multi-byte locale, case insensitive\n",
expr);
result |= run_test_backwards (expr, mem, memlen, 1, expectedicase);
/* Second test: search with an ISO-8859-1 locale. */
printf ("INFO: Testing de_DE.ISO-8859-1.\n");
xsetlocale (LC_ALL, "de_DE.ISO-8859-1");
inmem = (char *) expr;
inlen = strlen (expr);
outlen = inlen;
outmem = uexpr = alloca (outlen + 1);
memset (outmem, '\0', outlen + 1);
iconv (cd, &inmem, &inlen, &outmem, &outlen);
if (inlen != 0)
error (EXIT_FAILURE, errno, "cannot convert expression");
/* Run the tests. */
printf ("\nTest \"%s\" with 8-bit locale\n", expr);
result |= run_test (uexpr, umem, umemlen, 0, expected);
printf ("\nTest \"%s\" with 8-bit locale, case insensitive\n", expr);
result |= run_test (uexpr, umem, umemlen, 1, expectedicase);
printf ("\nTest \"%s\" backwards with 8-bit locale\n", expr);
result |= run_test_backwards (uexpr, umem, umemlen, 0, expected);
printf ("\nTest \"%s\" backwards with 8-bit locale, case insensitive\n",
expr);
result |= run_test_backwards (uexpr, umem, umemlen, 1, expectedicase);
return result;
}
static int
run_test (const char *expr, const char *mem, size_t memlen, int icase,
int expected)
{
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
struct timespec start;
struct timespec finish;
#endif
regex_t re;
int err;
size_t offset;
int cnt;
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
if (use_clock && !timing)
use_clock = clock_gettime (cl, &start) == 0;
#endif
err = regcomp (&re, expr, REG_NEWLINE | (icase ? REG_ICASE : 0));
if (err != REG_NOERROR)
{
char buf[200];
regerror (err, &re, buf, sizeof buf);
error (EXIT_FAILURE, 0, "cannot compile expression: %s", buf);
}
cnt = 0;
offset = 0;
assert (mem[memlen] == '\0');
while (offset < memlen)
{
regmatch_t ma[1];
const char *sp;
const char *ep;
err = regexec (&re, mem + offset, 1, ma, 0);
if (err == REG_NOMATCH)
break;
if (err != REG_NOERROR)
{
char buf[200];
regerror (err, &re, buf, sizeof buf);
error (EXIT_FAILURE, 0, "cannot use expression: %s", buf);
}
assert (ma[0].rm_so >= 0);
sp = mem + offset + ma[0].rm_so;
while (sp > mem && sp[-1] != '\n')
--sp;
ep = mem + offset + ma[0].rm_so;
while (*ep != '\0' && *ep != '\n')
++ep;
printf ("match %d: \"%.*s\"\n", ++cnt, (int) (ep - sp), sp);
offset = ep + 1 - mem;
}
regfree (&re);
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
if (use_clock && !timing)
{
use_clock = clock_gettime (cl, &finish) == 0;
if (use_clock)
{
if (finish.tv_nsec < start.tv_nsec)
{
finish.tv_nsec -= start.tv_nsec - 1000000000;
finish.tv_sec -= 1 + start.tv_sec;
}
else
{
finish.tv_nsec -= start.tv_nsec;
finish.tv_sec -= start.tv_sec;
}
printf ("elapsed time: %jd.%09jd sec\n",
(intmax_t) finish.tv_sec, (intmax_t) finish.tv_nsec);
}
}
if (use_clock && timing)
{
struct timespec mintime = { .tv_sec = 24 * 60 * 60 };
for (int i = 0; i < 10; ++i)
{
offset = 0;
use_clock = clock_gettime (cl, &start) == 0;
if (!use_clock)
continue;
err = regcomp (&re, expr, REG_NEWLINE | (icase ? REG_ICASE : 0));
if (err != REG_NOERROR)
continue;
while (offset < memlen)
{
regmatch_t ma[1];
err = regexec (&re, mem + offset, 1, ma, 0);
if (err != REG_NOERROR)
break;
offset += ma[0].rm_eo;
}
regfree (&re);
use_clock = clock_gettime (cl, &finish) == 0;
if (use_clock)
{
if (finish.tv_nsec < start.tv_nsec)
{
finish.tv_nsec -= start.tv_nsec - 1000000000;
finish.tv_sec -= 1 + start.tv_sec;
}
else
{
finish.tv_nsec -= start.tv_nsec;
finish.tv_sec -= start.tv_sec;
}
if (finish.tv_sec < mintime.tv_sec
|| (finish.tv_sec == mintime.tv_sec
&& finish.tv_nsec < mintime.tv_nsec))
mintime = finish;
}
}
printf ("elapsed time: %jd.%09jd sec\n",
(intmax_t) mintime.tv_sec, (intmax_t) mintime.tv_nsec);
}
#endif
/* Return an error if the number of matches found is not match we
expect. */
return cnt != expected;
}
static int
run_test_backwards (const char *expr, const char *mem, size_t memlen,
int icase, int expected)
{
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
struct timespec start;
struct timespec finish;
#endif
struct re_pattern_buffer re;
const char *err;
size_t offset;
int cnt;
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
if (use_clock && !timing)
use_clock = clock_gettime (cl, &start) == 0;
#endif
re_set_syntax ((RE_SYNTAX_POSIX_BASIC & ~RE_DOT_NEWLINE)
| RE_HAT_LISTS_NOT_NEWLINE
| (icase ? RE_ICASE : 0));
memset (&re, 0, sizeof (re));
re.fastmap = malloc (256);
if (re.fastmap == NULL)
error (EXIT_FAILURE, errno, "cannot allocate fastmap");
err = re_compile_pattern (expr, strlen (expr), &re);
if (err != NULL)
error (EXIT_FAILURE, 0, "cannot compile expression: %s", err);
if (re_compile_fastmap (&re))
error (EXIT_FAILURE, 0, "couldn't compile fastmap");
cnt = 0;
offset = memlen;
assert (mem[memlen] == '\0');
while (offset <= memlen)
{
int start;
const char *sp;
const char *ep;
start = re_search (&re, mem, memlen, offset, -offset, NULL);
if (start == -1)
break;
if (start == -2)
error (EXIT_FAILURE, 0, "internal error in re_search");
sp = mem + start;
while (sp > mem && sp[-1] != '\n')
--sp;
ep = mem + start;
while (*ep != '\0' && *ep != '\n')
++ep;
printf ("match %d: \"%.*s\"\n", ++cnt, (int) (ep - sp), sp);
offset = sp - 1 - mem;
}
regfree (&re);
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
if (use_clock && !timing)
{
use_clock = clock_gettime (cl, &finish) == 0;
if (use_clock)
{
if (finish.tv_nsec < start.tv_nsec)
{
finish.tv_nsec -= start.tv_nsec - 1000000000;
finish.tv_sec -= 1 + start.tv_sec;
}
else
{
finish.tv_nsec -= start.tv_nsec;
finish.tv_sec -= start.tv_sec;
}
printf ("elapsed time: %jd.%09jd sec\n",
(intmax_t) finish.tv_sec, (intmax_t) finish.tv_nsec);
}
}
if (use_clock && timing)
{
struct timespec mintime = { .tv_sec = 24 * 60 * 60 };
for (int i = 0; i < 10; ++i)
{
offset = memlen;
use_clock = clock_gettime (cl, &start) == 0;
if (!use_clock)
continue;
memset (&re, 0, sizeof (re));
re.fastmap = malloc (256);
if (re.fastmap == NULL)
continue;
err = re_compile_pattern (expr, strlen (expr), &re);
if (err != NULL)
continue;
if (re_compile_fastmap (&re))
{
regfree (&re);
continue;
}
while (offset <= memlen)
{
int start;
const char *sp;
start = re_search (&re, mem, memlen, offset, -offset, NULL);
if (start < -1)
break;
sp = mem + start;
while (sp > mem && sp[-1] != '\n')
--sp;
offset = sp - 1 - mem;
}
regfree (&re);
use_clock = clock_gettime (cl, &finish) == 0;
if (use_clock)
{
if (finish.tv_nsec < start.tv_nsec)
{
finish.tv_nsec -= start.tv_nsec - 1000000000;
finish.tv_sec -= 1 + start.tv_sec;
}
else
{
finish.tv_nsec -= start.tv_nsec;
finish.tv_sec -= start.tv_sec;
}
if (finish.tv_sec < mintime.tv_sec
|| (finish.tv_sec == mintime.tv_sec
&& finish.tv_nsec < mintime.tv_nsec))
mintime = finish;
}
}
printf ("elapsed time: %jd.%09jd sec\n",
(intmax_t) mintime.tv_sec, (intmax_t) mintime.tv_nsec);
}
#endif
/* Return an error if the number of matches found is not match we
expect. */
return cnt != expected;
}
/* If --timing is used we will need a larger timout. */
#define TIMEOUT 50
#define CMDLINE_OPTIONS \
{"timing", no_argument, &timing, 1 },
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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