source: kBuild/vendor/sed/current/testsuite/runptests.c

/* POSIX regex testsuite from IEEE 2003.2.
   Copyright (C) 1998, 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

   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., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301 USA.  */

#include <sys/types.h>
#include <regex.h>
#include <stdio.h>
#include <string.h>

/* Data structure to describe the tests.  */
struct test
{
  int start;
  int end;
  const char *reg;
  const char *str;
  int options;
} tests[] =
{
#include "ptestcases.h"
};


int
main (int argc, char *argv[])
{
  size_t cnt;
  int errors = 0;

  for (cnt = 0; cnt < sizeof (tests) / sizeof (tests[0]); ++cnt)
    if (tests[cnt].str == NULL)
      {
        printf ("\n%s\n%.*s\n", tests[cnt].reg,
                (int) strlen (tests[cnt].reg),
                "-----------------------------------------------------");
      }
    else if (tests[cnt].reg == NULL)
        printf ("!!! %s\n", tests[cnt].str);
    else
      {
        regex_t re;
        regmatch_t match[20];
        int err;

        printf ("regexp: \"%s\", string: \"%s\" -> ", tests[cnt].reg,
                tests[cnt].str);

        /* Compile the expression.  */
        err = regcomp (&re, tests[cnt].reg, tests[cnt].options);
        if (err != 0)
          {
            if (tests[cnt].start == -2)
              puts ("compiling failed, OK");
            else
              {
                char buf[100];
                regerror (err, &re, buf, sizeof (buf));
                printf ("FAIL: %s\n", buf);
                ++errors;
              }

            continue;
          }
        else if (tests[cnt].start == -2)
          {
            puts ("compiling suceeds, FAIL");
            errors++;
            continue;
          }

        /* Run the actual test.  */
        err = regexec (&re, tests[cnt].str, 20, match, 0);

        if (err != 0)
          {
            if (tests[cnt].start == -1)
              puts ("no match, OK");
            else
              {
                puts ("no match, FAIL");
                ++errors;
              }
          }
        else
          {
            if (match[0].rm_so == 0 && tests[cnt].start == 0
                && match[0].rm_eo == 0 && tests[cnt].end == 0)
              puts ("match, OK");
            else if (match[0].rm_so + 1 == tests[cnt].start
                     && match[0].rm_eo == tests[cnt].end)
              puts ("match, OK");
            else
              {
                printf ("wrong match (%d to %d): FAIL\n",
                        match[0].rm_so, match[0].rm_eo);
                ++errors;
              }
          }

        /* Free all resources.  */
        regfree (&re);
      }

  printf ("\n%Zu tests, %d errors\n", cnt, errors);

  return errors != 0;
}