/*
   BAREOS® - Backup Archiving REcovery Open Sourced

   Copyright (C) 2006-2006 Free Software Foundation Europe e.V.
   Copyright (C) 2016-2016 Bareos GmbH & Co. KG

   This program is Free Software; you can redistribute it and/or
   modify it under the terms of version three of the GNU Affero General Public
   License as published by the Free Software Foundation and included
   in the file LICENSE.

   This program 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
   Affero General Public License for more details.

   You should have received a copy of the GNU Affero General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.
*/
/*
 * Kern Sibbald, MMVI
 */
/**
 * @file
 * Test program for testing regular expressions.
 */

#include "include/bareos.h"

#ifndef HAVE_REGEX_H
#include "lib/bregex.h"
#else
#include <regex.h>
#endif


static void usage()
{
  fprintf(stderr,
          "\n"
          "Usage: bregex [-d debug_level] -f <data-file>\n"
          "       -f          specify file of data to be matched\n"
          "       -l          suppress line numbers\n"
          "       -n          print lines that do not match\n"
          "       -d <nn>     set debug level to <nn>\n"
          "       -dt         print timestamp in debug output\n"
          "       -?          print this message.\n"
          "\n\n");

  exit(1);
}


int main(int argc, char* const* argv)
{
  regex_t preg{};
  char prbuf[500];
  char* fname = NULL;
  int rc, ch;
  char data[1000];
  char pat[500];
  FILE* fd;
  bool match_only = true;
  int lineno;
  bool no_linenos = false;


  setlocale(LC_ALL, "");
  tzset();
  bindtextdomain("bareos", LOCALEDIR);
  textdomain("bareos");

  while ((ch = getopt(argc, argv, "d:f:nl?")) != -1) {
    switch (ch) {
      case 'd': /* set debug level */
        if (*optarg == 't') {
          dbg_timestamp = true;
        } else {
          debug_level = atoi(optarg);
          if (debug_level <= 0) { debug_level = 1; }
        }
        break;

      case 'f': /* data */
        fname = optarg;
        break;

      case 'l':
        no_linenos = true;
        break;

      case 'n':
        match_only = false;
        break;

      case '?':
      default:
        usage();
    }
  }
  argc -= optind;
  argv += optind;

  if (!fname) {
    printf("A data file must be specified.\n");
    usage();
  }

  OSDependentInit();

  for (;;) {
    printf("Enter regex pattern: ");
    if (fgets(pat, sizeof(pat) - 1, stdin) == NULL) { break; }
    StripTrailingNewline(pat);
    if (pat[0] == 0) { exit(0); }
    rc = regcomp(&preg, pat, REG_EXTENDED);
    if (rc != 0) {
      regerror(rc, &preg, prbuf, sizeof(prbuf));
      printf("Regex compile error: %s\n", prbuf);
      continue;
    }
    fd = fopen(fname, "r");
    if (!fd) {
      printf(_("Could not open data file: %s\n"), fname);
      exit(1);
    }
    lineno = 0;
    while (fgets(data, sizeof(data) - 1, fd)) {
      StripTrailingNewline(data);
      lineno++;
      rc = regexec(&preg, data, 0, NULL, 0);
      if ((match_only && rc == 0) || (!match_only && rc != 0)) {
        if (no_linenos) {
          printf("%s\n", data);
        } else {
          printf("%5d: %s\n", lineno, data);
        }
      }
    }
    fclose(fd);
    regfree(&preg);
  }
  exit(0);
}
