posix/tst-regex.c

   1 /* Copyright (C) 2001 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <spawn.h>
  20 #include "spawn_int.h"
  21
  22 #include <assert.h>
  23 #include <errno.h>
  24 #include <error.h>
  25 #include <fcntl.h>
  26 #include <iconv.h>
  27 #include <locale.h>
  28 #include <mcheck.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <time.h>
  33 #include <unistd.h>
  34 #include <sys/stat.h>
  35 #include <sys/types.h>
  36 #include <regex.h>
  37
  38
  39 #ifdef _POSIX_CPUTIME
  40 static clockid_t cl;
  41 static int use_clock;
  42 #endif
  43 static iconv_t cd;
  44 static char *mem;
  45 static char *umem;
  46 static size_t memlen;
  47
  48 static int test_expr (const char *expr, int expected);
  49 static int run_test (const char *expr, const char *mem, size_t memlen,
  50                      int expected);
  51
  52
  53 int
  54 main (void)
  55 {
  56   const char *file;
  57   int fd;
  58   struct stat st;
  59   int result;
  60   char *inmem;
  61   char *outmem;
  62   size_t inlen;
  63   size_t outlen;
  64
  65   mtrace ();
  66
  67   /* Make the content of the file available in memory.  */
  68   file = "../ChangeLog.8";
  69   fd = open (file, O_RDONLY);
  70   if (fd == -1)
  71     error (EXIT_FAILURE, errno, "cannot open %s", basename (file));
  72
  73   if (fstat (fd, &st) != 0)
  74     error (EXIT_FAILURE, errno, "cannot stat %s", basename (file));
  75   memlen = st.st_size;
  76
  77   mem = (char *) malloc (memlen + 1);
  78   if (mem == NULL)
  79     error (EXIT_FAILURE, errno, "while allocating buffer");
  80
  81   if (read (fd, mem, memlen) != memlen)
  82     error (EXIT_FAILURE, 0, "cannot read entire file");
  83   mem[memlen] = '\0';
  84
  85   close (fd);
  86
  87   /* We have to convert a few things from Latin-1 to UTF-8.  */
  88   cd = iconv_open ("UTF-8", "ISO-8859-1");
  89   if (cd == (iconv_t) -1)
  90     error (EXIT_FAILURE, errno, "cannot get conversion descriptor");
  91
  92   /* For the second test we have to convert the file content to UTF-8.
  93      Since the text is mostly ASCII it should be enough to allocate
  94      twice as much memory for the UTF-8 text than for the Latin-1
  95      text.  */
  96   umem = (char *) calloc (2, memlen);
  97   if (umem == NULL)
  98     error (EXIT_FAILURE, errno, "while allocating buffer");
  99
 100   inmem = mem;
 101   inlen = memlen;
 102   outmem = umem;
 103   outlen = 2 * memlen - 1;
 104   iconv (cd, &inmem, &inlen, &outmem, &outlen);
 105   if (inlen != 0)
 106     error (EXIT_FAILURE, errno, "cannot convert buffer");
 107
 108 #ifdef _POSIX_CPUTIME
 109   /* See whether we can use the CPU clock.  */
 110   use_clock = clock_getcpuclockid (0, &cl) == 0;
 111 #endif
 112
 113 #ifdef DEBUG
 114   re_set_syntax (RE_DEBUG);
 115 #endif
 116
 117   /* Run the actual tests.  All tests are run in a single-byte and a
 118      multi-byte locale.  */
 119   result = test_expr ("[äáàâéèêíìîñöóòôüúùû]", 2);
 120   result |= test_expr ("G.ran", 2);
 121   result |= test_expr ("G.\\{1\\}ran", 2);
 122   result |= test_expr ("G.*ran", 3);
 123   result |= test_expr ("[äáàâ]", 0);
 124
 125   /* Free the resources.  */
 126   free (umem);
 127   iconv_close (cd);
 128   free (mem);
 129
 130   return result;
 131 }
 132
 133
 134 static int
 135 test_expr (const char *expr, int expected)
 136 {
 137   int result;
 138   char *inmem;
 139   char *outmem;
 140   size_t inlen;
 141   size_t outlen;
 142   char *uexpr;
 143
 144   /* First test: search with an ISO-8859-1 locale.  */
 145   if (setlocale (LC_ALL, "de_DE.ISO-8859-1") == NULL)
 146     error (EXIT_FAILURE, 0, "cannot set locale de_DE.ISO-8859-1");
 147
 148   printf ("\nTest \"%s\" with 8-bit locale\n", expr);
 149   result = run_test (expr, mem, memlen, expected);
 150
 151   /* Second test: search with an UTF-8 locale.  */
 152   if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL)
 153     error (EXIT_FAILURE, 0, "cannot set locale de_DE.UTF-8");
 154
 155   inmem = (char *) expr;
 156   inlen = strlen (expr);
 157   outlen = inlen * MB_CUR_MAX;
 158   outmem = uexpr = alloca (outlen + 1);
 159   memset (outmem, '\0', outlen + 1);
 160   iconv (cd, &inmem, &inlen, &outmem, &outlen);
 161   if (inlen != 0)
 162     error (EXIT_FAILURE, errno, "cannot convert expression");
 163
 164   /* Run the tests.  */
 165   printf ("\nTest \"%s\" with multi-byte locale\n", expr);
 166   result |= run_test (uexpr, umem, 2 * memlen - outlen, expected);
 167
 168   return result;
 169 }
 170
 171
 172 static int
 173 run_test (const char *expr, const char *mem, size_t memlen, int expected)
 174 {
 175 #ifdef _POSIX_CPUTIME
 176   struct timespec start;
 177   struct timespec finish;
 178 #endif
 179   regex_t re;
 180   int err;
 181   size_t offset;
 182   int cnt;
 183
 184 #ifdef _POSIX_CPUTIME
 185   if (use_clock)
 186     use_clock = clock_gettime (cl, &start) == 0;
 187 #endif
 188
 189   err = regcomp (&re, expr, REG_NEWLINE);
 190   if (err != REG_NOERROR)
 191     {
 192       char buf[200];
 193       regerror (err, &re, buf, sizeof buf);
 194       error (EXIT_FAILURE, 0, "cannot compile expression: %s", buf);
 195     }
 196
 197   cnt = 0;
 198   offset = 0;
 199   assert (mem[memlen] == '\0');
 200   while (offset < memlen)
 201     {
 202       regmatch_t ma[1];
 203       const char *sp;
 204       const char *ep;
 205
 206       err = regexec (&re, mem + offset, 1, ma, 0);
 207       if (err == REG_NOMATCH)
 208         break;
 209
 210       if (err != REG_NOERROR)
 211         {
 212           char buf[200];
 213           regerror (err, &re, buf, sizeof buf);
 214           error (EXIT_FAILURE, 0, "cannot use expression: %s", buf);
 215         }
 216
 217       assert (ma[0].rm_so >= 0);
 218       sp = mem + offset + ma[0].rm_so;
 219       while (sp > mem && sp[-1] != '\n')
 220         --sp;
 221
 222       ep = mem + offset + ma[0].rm_so;
 223       while (*ep != '\0' && *ep != '\n')
 224         ++ep;
 225
 226       printf ("match %d: \"%.*s\"\n", ++cnt, (int) (ep - sp), sp);
 227
 228       offset = ep + 1 - mem;
 229     }
 230
 231   regfree (&re);
 232
 233 #ifdef _POSIX_CPUTIME
 234   if (use_clock)
 235     {
 236       use_clock = clock_gettime (cl, &finish) == 0;
 237       if (use_clock)
 238         {
 239           if (finish.tv_nsec < start.tv_nsec)
 240             {
 241               finish.tv_nsec -= start.tv_nsec - 1000000000;
 242               finish.tv_sec -= 1 + start.tv_sec;
 243             }
 244           else
 245             {
 246               finish.tv_nsec -= start.tv_nsec;
 247               finish.tv_sec -= start.tv_sec;
 248             }
 249
 250           printf ("elapsed time: %ld.%09ld sec\n",
 251                   finish.tv_sec, finish.tv_nsec);
 252         }
 253     }
 254 #endif
 255
 256   /* Return an error if the number of matches found is not match we
 257      expect.  */
 258   return cnt != expected;
 259 }