1 /* Copyright (C) 2001-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <assert.h>
19 #include <errno.h>
20 #include <error.h>
21 #include <fcntl.h>
22 #include <getopt.h>
23 #include <iconv.h>
24 #include <locale.h>
25 #include <mcheck.h>
26 #include <stdint.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <time.h>
31 #include <unistd.h>
32 #include <sys/stat.h>
33 #include <sys/types.h>
34 #include <regex.h>
35 #include <support/support.h>
36
37
38 #if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
39 static clockid_t cl;
40 static int use_clock;
41 #endif
42 static iconv_t cd;
43 static char *mem;
44 static char *umem;
45 static size_t memlen;
46 static size_t umemlen;
47 static int timing;
48
49 static int test_expr (const char *expr, int expected, int expectedicase);
50 static int run_test (const char *expr, const char *mem, size_t memlen,
51 int icase, int expected);
52 static int run_test_backwards (const char *expr, const char *mem,
53 size_t memlen, int icase, int expected);
54
55
56 static int
57 do_test (void)
58 {
59 const char *file;
60 int fd;
61 struct stat st;
62 int result = 0;
63 char *inmem;
64 char *outmem;
65 size_t inlen;
66 size_t outlen;
67
68 mtrace ();
69
70 /* Make the content of the file available in memory. */
71 file = "./tst-regex.input";
72 fd = open (file, O_RDONLY);
73 if (fd == -1)
74 error (EXIT_FAILURE, errno, "cannot open %s", basename (file));
75
76 if (fstat (fd, &st) != 0)
77 error (EXIT_FAILURE, errno, "cannot stat %s", basename (file));
78 memlen = st.st_size;
79
80 mem = (char *) malloc (memlen + 1);
81 if (mem == NULL)
82 error (EXIT_FAILURE, errno, "while allocating buffer");
83
84 if ((size_t) read (fd, mem, memlen) != memlen)
85 error (EXIT_FAILURE, 0, "cannot read entire file");
86 mem[memlen] = '\0';
87
88 close (fd);
89
90 /* We have to convert a few things from UTF-8 to Latin-1. */
91 cd = iconv_open ("ISO-8859-1", "UTF-8");
92 if (cd == (iconv_t) -1)
93 error (EXIT_FAILURE, errno, "cannot get conversion descriptor");
94
95 /* For the second test we have to convert the file content to Latin-1.
96 This cannot grow the data. */
97 umem = (char *) malloc (memlen + 1);
98 if (umem == NULL)
99 error (EXIT_FAILURE, errno, "while allocating buffer");
100
101 inmem = mem;
102 inlen = memlen;
103 outmem = umem;
104 outlen = memlen;
105 iconv (cd, &inmem, &inlen, &outmem, &outlen);
106 umemlen = outmem - umem;
107 if (inlen != 0)
108 error (EXIT_FAILURE, errno, "cannot convert buffer");
109 umem[umemlen] = '\0';
110
111 #if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
112 # if _POSIX_CPUTIME == 0
113 if (sysconf (_SC_CPUTIME) < 0)
114 use_clock = 0;
115 else
116 # endif
117 /* See whether we can use the CPU clock. */
118 use_clock = clock_getcpuclockid (0, &cl) == 0;
119 #endif
120
121 #ifdef DEBUG
122 re_set_syntax (RE_DEBUG);
123 #endif
124
125 /* Run the actual tests. All tests are run in a single-byte and a
126 multi-byte locale. */
127 result |= test_expr ("[äáàâéèêíìîñöóòôüúùû]", 4, 4);
128 result |= test_expr ("G.ran", 2, 3);
129 result |= test_expr ("G.\\{1\\}ran", 2, 3);
130 result |= test_expr ("G.*ran", 3, 43);
131 result |= test_expr ("[äáàâ]", 0, 0);
132 result |= test_expr ("Uddeborg", 2, 2);
133 result |= test_expr (".Uddeborg", 2, 2);
134
135 /* Free the resources. */
136 free (umem);
137 iconv_close (cd);
138 free (mem);
139
140 return result;
141 }
142
143
144 static int
145 test_expr (const char *expr, int expected, int expectedicase)
146 {
147 int result = 0;
148 char *inmem;
149 char *outmem;
150 size_t inlen;
151 size_t outlen;
152 char *uexpr;
153
154 /* First test: search with basic C.UTF-8 locale. */
155 printf ("INFO: Testing C.UTF-8.\n");
156 xsetlocale (LC_ALL, "C.UTF-8");
157
158 printf ("\nTest \"%s\" with multi-byte locale\n", expr);
159 result |= run_test (expr, mem, memlen, 0, expected);
160 printf ("\nTest \"%s\" with multi-byte locale, case insensitive\n", expr);
161 result |= run_test (expr, mem, memlen, 1, expectedicase);
162 printf ("\nTest \"%s\" backwards with multi-byte locale\n", expr);
163 result |= run_test_backwards (expr, mem, memlen, 0, expected);
164 printf ("\nTest \"%s\" backwards with multi-byte locale, case insensitive\n",
165 expr);
166 result |= run_test_backwards (expr, mem, memlen, 1, expectedicase);
167
168 /* Second test: search with an UTF-8 locale. */
169 printf ("INFO: Testing de_DE.UTF-8.\n");
170 xsetlocale (LC_ALL, "de_DE.UTF-8");
171
172 printf ("\nTest \"%s\" with multi-byte locale\n", expr);
173 result |= run_test (expr, mem, memlen, 0, expected);
174 printf ("\nTest \"%s\" with multi-byte locale, case insensitive\n", expr);
175 result |= run_test (expr, mem, memlen, 1, expectedicase);
176 printf ("\nTest \"%s\" backwards with multi-byte locale\n", expr);
177 result |= run_test_backwards (expr, mem, memlen, 0, expected);
178 printf ("\nTest \"%s\" backwards with multi-byte locale, case insensitive\n",
179 expr);
180 result |= run_test_backwards (expr, mem, memlen, 1, expectedicase);
181
182 /* Second test: search with an ISO-8859-1 locale. */
183 printf ("INFO: Testing de_DE.ISO-8859-1.\n");
184 xsetlocale (LC_ALL, "de_DE.ISO-8859-1");
185
186 inmem = (char *) expr;
187 inlen = strlen (expr);
188 outlen = inlen;
189 outmem = uexpr = alloca (outlen + 1);
190 memset (outmem, '\0', outlen + 1);
191 iconv (cd, &inmem, &inlen, &outmem, &outlen);
192 if (inlen != 0)
193 error (EXIT_FAILURE, errno, "cannot convert expression");
194
195 /* Run the tests. */
196 printf ("\nTest \"%s\" with 8-bit locale\n", expr);
197 result |= run_test (uexpr, umem, umemlen, 0, expected);
198 printf ("\nTest \"%s\" with 8-bit locale, case insensitive\n", expr);
199 result |= run_test (uexpr, umem, umemlen, 1, expectedicase);
200 printf ("\nTest \"%s\" backwards with 8-bit locale\n", expr);
201 result |= run_test_backwards (uexpr, umem, umemlen, 0, expected);
202 printf ("\nTest \"%s\" backwards with 8-bit locale, case insensitive\n",
203 expr);
204 result |= run_test_backwards (uexpr, umem, umemlen, 1, expectedicase);
205
206 return result;
207 }
208
209
210 static int
211 run_test (const char *expr, const char *mem, size_t memlen, int icase,
212 int expected)
213 {
214 #if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
215 struct timespec start;
216 struct timespec finish;
217 #endif
218 regex_t re;
219 int err;
220 size_t offset;
221 int cnt;
222
223 #if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
224 if (use_clock && !timing)
225 use_clock = clock_gettime (cl, &start) == 0;
226 #endif
227
228 err = regcomp (&re, expr, REG_NEWLINE | (icase ? REG_ICASE : 0));
229 if (err != REG_NOERROR)
230 {
231 char buf[200];
232 regerror (err, &re, buf, sizeof buf);
233 error (EXIT_FAILURE, 0, "cannot compile expression: %s", buf);
234 }
235
236 cnt = 0;
237 offset = 0;
238 assert (mem[memlen] == '\0');
239 while (offset < memlen)
240 {
241 regmatch_t ma[1];
242 const char *sp;
243 const char *ep;
244
245 err = regexec (&re, mem + offset, 1, ma, 0);
246 if (err == REG_NOMATCH)
247 break;
248
249 if (err != REG_NOERROR)
250 {
251 char buf[200];
252 regerror (err, &re, buf, sizeof buf);
253 error (EXIT_FAILURE, 0, "cannot use expression: %s", buf);
254 }
255
256 assert (ma[0].rm_so >= 0);
257 sp = mem + offset + ma[0].rm_so;
258 while (sp > mem && sp[-1] != '\n')
259 --sp;
260
261 ep = mem + offset + ma[0].rm_so;
262 while (*ep != '\0' && *ep != '\n')
263 ++ep;
264
265 printf ("match %d: \"%.*s\"\n", ++cnt, (int) (ep - sp), sp);
266
267 offset = ep + 1 - mem;
268 }
269
270 regfree (&re);
271
272 #if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
273 if (use_clock && !timing)
274 {
275 use_clock = clock_gettime (cl, &finish) == 0;
276 if (use_clock)
277 {
278 if (finish.tv_nsec < start.tv_nsec)
279 {
280 finish.tv_nsec -= start.tv_nsec - 1000000000;
281 finish.tv_sec -= 1 + start.tv_sec;
282 }
283 else
284 {
285 finish.tv_nsec -= start.tv_nsec;
286 finish.tv_sec -= start.tv_sec;
287 }
288
289 printf ("elapsed time: %jd.%09jd sec\n",
290 (intmax_t) finish.tv_sec, (intmax_t) finish.tv_nsec);
291 }
292 }
293
294 if (use_clock && timing)
295 {
296 struct timespec mintime = { .tv_sec = 24 * 60 * 60 };
297
298 for (int i = 0; i < 10; ++i)
299 {
300 offset = 0;
301 use_clock = clock_gettime (cl, &start) == 0;
302
303 if (!use_clock)
304 continue;
305
306 err = regcomp (&re, expr, REG_NEWLINE | (icase ? REG_ICASE : 0));
307 if (err != REG_NOERROR)
308 continue;
309
310 while (offset < memlen)
311 {
312 regmatch_t ma[1];
313
314 err = regexec (&re, mem + offset, 1, ma, 0);
315 if (err != REG_NOERROR)
316 break;
317
318 offset += ma[0].rm_eo;
319 }
320
321 regfree (&re);
322
323 use_clock = clock_gettime (cl, &finish) == 0;
324 if (use_clock)
325 {
326 if (finish.tv_nsec < start.tv_nsec)
327 {
328 finish.tv_nsec -= start.tv_nsec - 1000000000;
329 finish.tv_sec -= 1 + start.tv_sec;
330 }
331 else
332 {
333 finish.tv_nsec -= start.tv_nsec;
334 finish.tv_sec -= start.tv_sec;
335 }
336 if (finish.tv_sec < mintime.tv_sec
337 || (finish.tv_sec == mintime.tv_sec
338 && finish.tv_nsec < mintime.tv_nsec))
339 mintime = finish;
340 }
341 }
342 printf ("elapsed time: %jd.%09jd sec\n",
343 (intmax_t) mintime.tv_sec, (intmax_t) mintime.tv_nsec);
344 }
345 #endif
346
347 /* Return an error if the number of matches found is not match we
348 expect. */
349 return cnt != expected;
350 }
351
352
353 static int
354 run_test_backwards (const char *expr, const char *mem, size_t memlen,
355 int icase, int expected)
356 {
357 #if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
358 struct timespec start;
359 struct timespec finish;
360 #endif
361 struct re_pattern_buffer re;
362 const char *err;
363 size_t offset;
364 int cnt;
365
366 #if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
367 if (use_clock && !timing)
368 use_clock = clock_gettime (cl, &start) == 0;
369 #endif
370
371 re_set_syntax ((RE_SYNTAX_POSIX_BASIC & ~RE_DOT_NEWLINE)
372 | RE_HAT_LISTS_NOT_NEWLINE
373 | (icase ? RE_ICASE : 0));
374
375 memset (&re, 0, sizeof (re));
376 re.fastmap = malloc (256);
377 if (re.fastmap == NULL)
378 error (EXIT_FAILURE, errno, "cannot allocate fastmap");
379
380 err = re_compile_pattern (expr, strlen (expr), &re);
381 if (err != NULL)
382 error (EXIT_FAILURE, 0, "cannot compile expression: %s", err);
383
384 if (re_compile_fastmap (&re))
385 error (EXIT_FAILURE, 0, "couldn't compile fastmap");
386
387 cnt = 0;
388 offset = memlen;
389 assert (mem[memlen] == '\0');
390 while (offset <= memlen)
391 {
392 int start;
393 const char *sp;
394 const char *ep;
395
396 start = re_search (&re, mem, memlen, offset, -offset, NULL);
397 if (start == -1)
398 break;
399
400 if (start == -2)
401 error (EXIT_FAILURE, 0, "internal error in re_search");
402
403 sp = mem + start;
404 while (sp > mem && sp[-1] != '\n')
405 --sp;
406
407 ep = mem + start;
408 while (*ep != '\0' && *ep != '\n')
409 ++ep;
410
411 printf ("match %d: \"%.*s\"\n", ++cnt, (int) (ep - sp), sp);
412
413 offset = sp - 1 - mem;
414 }
415
416 regfree (&re);
417
418 #if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
419 if (use_clock && !timing)
420 {
421 use_clock = clock_gettime (cl, &finish) == 0;
422 if (use_clock)
423 {
424 if (finish.tv_nsec < start.tv_nsec)
425 {
426 finish.tv_nsec -= start.tv_nsec - 1000000000;
427 finish.tv_sec -= 1 + start.tv_sec;
428 }
429 else
430 {
431 finish.tv_nsec -= start.tv_nsec;
432 finish.tv_sec -= start.tv_sec;
433 }
434
435 printf ("elapsed time: %jd.%09jd sec\n",
436 (intmax_t) finish.tv_sec, (intmax_t) finish.tv_nsec);
437 }
438 }
439
440 if (use_clock && timing)
441 {
442 struct timespec mintime = { .tv_sec = 24 * 60 * 60 };
443
444 for (int i = 0; i < 10; ++i)
445 {
446 offset = memlen;
447 use_clock = clock_gettime (cl, &start) == 0;
448
449 if (!use_clock)
450 continue;
451
452 memset (&re, 0, sizeof (re));
453 re.fastmap = malloc (256);
454 if (re.fastmap == NULL)
455 continue;
456
457 err = re_compile_pattern (expr, strlen (expr), &re);
458 if (err != NULL)
459 continue;
460
461 if (re_compile_fastmap (&re))
462 {
463 regfree (&re);
464 continue;
465 }
466
467 while (offset <= memlen)
468 {
469 int start;
470 const char *sp;
471
472 start = re_search (&re, mem, memlen, offset, -offset, NULL);
473 if (start < -1)
474 break;
475
476 sp = mem + start;
477 while (sp > mem && sp[-1] != '\n')
478 --sp;
479
480 offset = sp - 1 - mem;
481 }
482
483 regfree (&re);
484
485 use_clock = clock_gettime (cl, &finish) == 0;
486 if (use_clock)
487 {
488 if (finish.tv_nsec < start.tv_nsec)
489 {
490 finish.tv_nsec -= start.tv_nsec - 1000000000;
491 finish.tv_sec -= 1 + start.tv_sec;
492 }
493 else
494 {
495 finish.tv_nsec -= start.tv_nsec;
496 finish.tv_sec -= start.tv_sec;
497 }
498 if (finish.tv_sec < mintime.tv_sec
499 || (finish.tv_sec == mintime.tv_sec
500 && finish.tv_nsec < mintime.tv_nsec))
501 mintime = finish;
502 }
503 }
504 printf ("elapsed time: %jd.%09jd sec\n",
505 (intmax_t) mintime.tv_sec, (intmax_t) mintime.tv_nsec);
506 }
507 #endif
508
509 /* Return an error if the number of matches found is not match we
510 expect. */
511 return cnt != expected;
512 }
513
514 /* If --timing is used we will need a larger timeout. */
515 #define TIMEOUT 50
516 #define CMDLINE_OPTIONS \
517 {"timing", no_argument, &timing, 1 },
518 #define TEST_FUNCTION do_test ()
519 #include "../test-skeleton.c"