Wildcard string compare (globbing)

Jack Handy

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4.90/5 (82 votes)

15 Feb 2005

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Matches a string against a wildcard string such as "*.*" or "bl?h.*" etc. This is good for file globbing or to match hostmasks.

Usage:

This is a fast, lightweight, and simple pattern matching function.

if (wildcmp("bl?h.*", "blah.jpg")) {
  //we have a match!
} else {
  //no match =(
}

Function:

int wildcmp(const char *wild, const char *string) {
  // Written by Jack Handy - <A href="mailto:jakkhandy@hotmail.com">jakkhandy@hotmail.com</A>
  const char *cp = NULL, *mp = NULL;

  while ((*string) && (*wild != '*')) {
    if ((*wild != *string) && (*wild != '?')) {
      return 0;
    }
    wild++;
    string++;
  }

  while (*string) {
    if (*wild == '*') {
      if (!*++wild) {
        return 1;
      }
      mp = wild;
      cp = string+1;
    } else if ((*wild == *string) || (*wild == '?')) {
      wild++;
      string++;
    } else {
      wild = mp;
      string = cp++;
    }
  }

  while (*wild == '*') {
    wild++;
  }
  return !*wild;
}

License

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Written By

Jack Handy

Web Developer

United States

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public static bool Match(string eval, string pattern, bool caseSensitive) { bool match = false; // Make input parameters lower-case if case is not an issue if (!caseSensitive) { eval = eval.ToLower(); pattern = pattern.ToLower(); } // Escape regexp special character in pattern pattern = pattern.Replace(".", @"\."); // Replace valid wildcards with regexp equivalents pattern = pattern.Replace('?', '.').Replace("*", ".*"); // Add boundaries to pattern pattern = @"\A" + pattern + @"\z"; // Search for a match try { match = Regex.IsMatch(eval, pattern); } catch /* (ArgumentException ex) */ { // Syntax error in the regular expression } // Return result return match; }

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Wildcard string compare (globbing)

Usage:

Function:

License

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