about summary refs log tree commit diff
path: root/posix/tst-regex.c
blob: adc2d8ab9acf2559752e94d93c5f3afbd8213852 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
/* Copyright (C) 2001, 2003 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <spawn.h>
#include "spawn_int.h"

#include <assert.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <iconv.h>
#include <locale.h>
#include <mcheck.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>


#ifdef _POSIX_CPUTIME
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 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);


int
main (void)
{
  const char *file;
  int fd;
  struct stat st;
  int result;
  char *inmem;
  char *outmem;
  size_t inlen;
  size_t outlen;

  mtrace ();

  /* Make the content of the file available in memory.  */
  file = "../ChangeLog.8";
  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 Latin-1 to UTF-8.  */
  cd = iconv_open ("UTF-8", "ISO-8859-1");
  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 UTF-8.
     Since the text is mostly ASCII it should be enough to allocate
     twice as much memory for the UTF-8 text than for the Latin-1
     text.  */
  umem = (char *) calloc (2, memlen);
  if (umem == NULL)
    error (EXIT_FAILURE, errno, "while allocating buffer");

  inmem = mem;
  inlen = memlen;
  outmem = umem;
  outlen = 2 * memlen - 1;
  iconv (cd, &inmem, &inlen, &outmem, &outlen);
  umemlen = outmem - umem;
  if (inlen != 0)
    error (EXIT_FAILURE, errno, "cannot convert buffer");

#ifdef _POSIX_CPUTIME
  /* 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]", 2, 2);
  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);

  /* 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;
  char *inmem;
  char *outmem;
  size_t inlen;
  size_t outlen;
  char *uexpr;

  /* First test: search with an ISO-8859-1 locale.  */
  if (setlocale (LC_ALL, "de_DE.ISO-8859-1") == NULL)
    error (EXIT_FAILURE, 0, "cannot set locale de_DE.ISO-8859-1");

  printf ("\nTest \"%s\" with 8-bit locale\n", expr);
  result = run_test (expr, mem, memlen, 0, expected);
  printf ("\nTest \"%s\" with 8-bit locale, case insensitive\n", expr);
  result |= run_test (expr, mem, memlen, 1, expectedicase);
  printf ("\nTest \"%s\" backwards with 8-bit locale\n", expr);
  result |= run_test_backwards (expr, mem, memlen, 0, expected);
  printf ("\nTest \"%s\" backwards with 8-bit locale, case insensitive\n",
	  expr);
  result |= run_test_backwards (expr, mem, memlen, 1, expectedicase);

  /* Second test: search with an UTF-8 locale.  */
  if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL)
    error (EXIT_FAILURE, 0, "cannot set locale de_DE.UTF-8");

  inmem = (char *) expr;
  inlen = strlen (expr);
  outlen = inlen * MB_CUR_MAX;
  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 multi-byte locale\n", expr);
  result |= run_test (uexpr, umem, umemlen, 0, expected);
  printf ("\nTest \"%s\" with multi-byte locale, case insensitive\n", expr);
  result |= run_test (uexpr, umem, umemlen, 1, expectedicase);
  printf ("\nTest \"%s\" backwards with multi-byte locale\n", expr);
  result |= run_test_backwards (uexpr, umem, umemlen, 0, expected);
  printf ("\nTest \"%s\" backwards with multi-byte 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)
{
#ifdef _POSIX_CPUTIME
  struct timespec start;
  struct timespec finish;
#endif
  regex_t re;
  int err;
  size_t offset;
  int cnt;

#ifdef _POSIX_CPUTIME
  if (use_clock)
    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);

#ifdef _POSIX_CPUTIME
  if (use_clock)
    {
      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: %ld.%09ld sec\n",
		  finish.tv_sec, finish.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)
{
#ifdef _POSIX_CPUTIME
  struct timespec start;
  struct timespec finish;
#endif
  struct re_pattern_buffer re;
  const char *err;
  size_t offset;
  int cnt;

#ifdef _POSIX_CPUTIME
  if (use_clock)
    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);

#ifdef _POSIX_CPUTIME
  if (use_clock)
    {
      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: %ld.%09ld sec\n",
		  finish.tv_sec, finish.tv_nsec);
	}
    }
#endif

  /* Return an error if the number of matches found is not match we
     expect.  */
  return cnt != expected;
}